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Diffstat (limited to 'media/libsoundtouch/src')
29 files changed, 6409 insertions, 0 deletions
diff --git a/media/libsoundtouch/src/AAFilter.cpp b/media/libsoundtouch/src/AAFilter.cpp new file mode 100644 index 0000000000..3fd4e9fe6d --- /dev/null +++ b/media/libsoundtouch/src/AAFilter.cpp @@ -0,0 +1,222 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// FIR low-pass (anti-alias) filter with filter coefficient design routine and +/// MMX optimization. +/// +/// Anti-alias filter is used to prevent folding of high frequencies when +/// transposing the sample rate with interpolation. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <memory.h> +#include <assert.h> +#include <math.h> +#include <stdlib.h> +#include "AAFilter.h" +#include "FIRFilter.h" + +using namespace soundtouch; + +#define PI M_PI +#define TWOPI (2 * PI) + +// define this to save AA filter coefficients to a file +// #define _DEBUG_SAVE_AAFILTER_COEFFICIENTS 1 + +#ifdef _DEBUG_SAVE_AAFILTER_COEFFICIENTS + #include <stdio.h> + + static void _DEBUG_SAVE_AAFIR_COEFFS(SAMPLETYPE *coeffs, int len) + { + FILE *fptr = fopen("aa_filter_coeffs.txt", "wt"); + if (fptr == NULL) return; + + for (int i = 0; i < len; i ++) + { + double temp = coeffs[i]; + fprintf(fptr, "%lf\n", temp); + } + fclose(fptr); + } + +#else + #define _DEBUG_SAVE_AAFIR_COEFFS(x, y) +#endif + +/***************************************************************************** + * + * Implementation of the class 'AAFilter' + * + *****************************************************************************/ + +AAFilter::AAFilter(uint len) +{ + pFIR = FIRFilter::newInstance(); + cutoffFreq = 0.5; + setLength(len); +} + + +AAFilter::~AAFilter() +{ + delete pFIR; +} + + +// Sets new anti-alias filter cut-off edge frequency, scaled to +// sampling frequency (nyquist frequency = 0.5). +// The filter will cut frequencies higher than the given frequency. +void AAFilter::setCutoffFreq(double newCutoffFreq) +{ + cutoffFreq = newCutoffFreq; + calculateCoeffs(); +} + + +// Sets number of FIR filter taps +void AAFilter::setLength(uint newLength) +{ + length = newLength; + calculateCoeffs(); +} + + +// Calculates coefficients for a low-pass FIR filter using Hamming window +void AAFilter::calculateCoeffs() +{ + uint i; + double cntTemp, temp, tempCoeff,h, w; + double wc; + double scaleCoeff, sum; + double *work; + SAMPLETYPE *coeffs; + + assert(length >= 2); + assert(length % 4 == 0); + assert(cutoffFreq >= 0); + assert(cutoffFreq <= 0.5); + + work = new double[length]; + coeffs = new SAMPLETYPE[length]; + + wc = 2.0 * PI * cutoffFreq; + tempCoeff = TWOPI / (double)length; + + sum = 0; + for (i = 0; i < length; i ++) + { + cntTemp = (double)i - (double)(length / 2); + + temp = cntTemp * wc; + if (temp != 0) + { + h = sin(temp) / temp; // sinc function + } + else + { + h = 1.0; + } + w = 0.54 + 0.46 * cos(tempCoeff * cntTemp); // hamming window + + temp = w * h; + work[i] = temp; + + // calc net sum of coefficients + sum += temp; + } + + // ensure the sum of coefficients is larger than zero + assert(sum > 0); + + // ensure we've really designed a lowpass filter... + assert(work[length/2] > 0); + assert(work[length/2 + 1] > -1e-6); + assert(work[length/2 - 1] > -1e-6); + + // Calculate a scaling coefficient in such a way that the result can be + // divided by 16384 + scaleCoeff = 16384.0f / sum; + + for (i = 0; i < length; i ++) + { + temp = work[i] * scaleCoeff; + // scale & round to nearest integer + temp += (temp >= 0) ? 0.5 : -0.5; + // ensure no overfloods + assert(temp >= -32768 && temp <= 32767); + coeffs[i] = (SAMPLETYPE)temp; + } + + // Set coefficients. Use divide factor 14 => divide result by 2^14 = 16384 + pFIR->setCoefficients(coeffs, length, 14); + + _DEBUG_SAVE_AAFIR_COEFFS(coeffs, length); + + delete[] work; + delete[] coeffs; +} + + +// Applies the filter to the given sequence of samples. +// Note : The amount of outputted samples is by value of 'filter length' +// smaller than the amount of input samples. +uint AAFilter::evaluate(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples, uint numChannels) const +{ + return pFIR->evaluate(dest, src, numSamples, numChannels); +} + + +/// Applies the filter to the given src & dest pipes, so that processed amount of +/// samples get removed from src, and produced amount added to dest +/// Note : The amount of outputted samples is by value of 'filter length' +/// smaller than the amount of input samples. +uint AAFilter::evaluate(FIFOSampleBuffer &dest, FIFOSampleBuffer &src) const +{ + SAMPLETYPE *pdest; + const SAMPLETYPE *psrc; + uint numSrcSamples; + uint result; + int numChannels = src.getChannels(); + + assert(numChannels == dest.getChannels()); + + numSrcSamples = src.numSamples(); + psrc = src.ptrBegin(); + pdest = dest.ptrEnd(numSrcSamples); + result = pFIR->evaluate(pdest, psrc, numSrcSamples, numChannels); + src.receiveSamples(result); + dest.putSamples(result); + + return result; +} + + +uint AAFilter::getLength() const +{ + return pFIR->getLength(); +} diff --git a/media/libsoundtouch/src/AAFilter.h b/media/libsoundtouch/src/AAFilter.h new file mode 100644 index 0000000000..81d836b750 --- /dev/null +++ b/media/libsoundtouch/src/AAFilter.h @@ -0,0 +1,93 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Sampled sound tempo changer/time stretch algorithm. Changes the sound tempo +/// while maintaining the original pitch by using a time domain WSOLA-like method +/// with several performance-increasing tweaks. +/// +/// Anti-alias filter is used to prevent folding of high frequencies when +/// transposing the sample rate with interpolation. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef AAFilter_H +#define AAFilter_H + +#include "STTypes.h" +#include "FIFOSampleBuffer.h" + +namespace soundtouch +{ + +class AAFilter +{ +protected: + class FIRFilter *pFIR; + + /// Low-pass filter cut-off frequency, negative = invalid + double cutoffFreq; + + /// num of filter taps + uint length; + + /// Calculate the FIR coefficients realizing the given cutoff-frequency + void calculateCoeffs(); +public: + AAFilter(uint length); + + ~AAFilter(); + + /// Sets new anti-alias filter cut-off edge frequency, scaled to sampling + /// frequency (nyquist frequency = 0.5). The filter will cut off the + /// frequencies than that. + void setCutoffFreq(double newCutoffFreq); + + /// Sets number of FIR filter taps, i.e. ~filter complexity + void setLength(uint newLength); + + uint getLength() const; + + /// Applies the filter to the given sequence of samples. + /// Note : The amount of outputted samples is by value of 'filter length' + /// smaller than the amount of input samples. + uint evaluate(SAMPLETYPE *dest, + const SAMPLETYPE *src, + uint numSamples, + uint numChannels) const; + + /// Applies the filter to the given src & dest pipes, so that processed amount of + /// samples get removed from src, and produced amount added to dest + /// Note : The amount of outputted samples is by value of 'filter length' + /// smaller than the amount of input samples. + uint evaluate(FIFOSampleBuffer &dest, + FIFOSampleBuffer &src) const; + +}; + +} + +#endif diff --git a/media/libsoundtouch/src/FIFOSampleBuffer.cpp b/media/libsoundtouch/src/FIFOSampleBuffer.cpp new file mode 100644 index 0000000000..ad36875466 --- /dev/null +++ b/media/libsoundtouch/src/FIFOSampleBuffer.cpp @@ -0,0 +1,275 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// A buffer class for temporarily storaging sound samples, operates as a +/// first-in-first-out pipe. +/// +/// Samples are added to the end of the sample buffer with the 'putSamples' +/// function, and are received from the beginning of the buffer by calling +/// the 'receiveSamples' function. The class automatically removes the +/// outputted samples from the buffer, as well as grows the buffer size +/// whenever necessary. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <stdlib.h> +#include <memory.h> +#include <string.h> +#include <assert.h> + +#include "FIFOSampleBuffer.h" + +using namespace soundtouch; + +// Constructor +FIFOSampleBuffer::FIFOSampleBuffer(int numChannels) +{ + assert(numChannels > 0); + sizeInBytes = 0; // reasonable initial value + buffer = NULL; + bufferUnaligned = NULL; + samplesInBuffer = 0; + bufferPos = 0; + channels = (uint)numChannels; + ensureCapacity(32); // allocate initial capacity +} + + +// destructor +FIFOSampleBuffer::~FIFOSampleBuffer() +{ + delete[] bufferUnaligned; + bufferUnaligned = NULL; + buffer = NULL; +} + + +// Sets number of channels, 1 = mono, 2 = stereo +void FIFOSampleBuffer::setChannels(int numChannels) +{ + uint usedBytes; + + if (!verifyNumberOfChannels(numChannels)) return; + + usedBytes = channels * samplesInBuffer; + channels = (uint)numChannels; + samplesInBuffer = usedBytes / channels; +} + + +// if output location pointer 'bufferPos' isn't zero, 'rewinds' the buffer and +// zeroes this pointer by copying samples from the 'bufferPos' pointer +// location on to the beginning of the buffer. +void FIFOSampleBuffer::rewind() +{ + if (buffer && bufferPos) + { + memmove(buffer, ptrBegin(), sizeof(SAMPLETYPE) * channels * samplesInBuffer); + bufferPos = 0; + } +} + + +// Adds 'numSamples' pcs of samples from the 'samples' memory position to +// the sample buffer. +void FIFOSampleBuffer::putSamples(const SAMPLETYPE *samples, uint nSamples) +{ + memcpy(ptrEnd(nSamples), samples, sizeof(SAMPLETYPE) * nSamples * channels); + samplesInBuffer += nSamples; +} + + +// Increases the number of samples in the buffer without copying any actual +// samples. +// +// This function is used to update the number of samples in the sample buffer +// when accessing the buffer directly with 'ptrEnd' function. Please be +// careful though! +void FIFOSampleBuffer::putSamples(uint nSamples) +{ + uint req; + + req = samplesInBuffer + nSamples; + ensureCapacity(req); + samplesInBuffer += nSamples; +} + + +// Returns a pointer to the end of the used part of the sample buffer (i.e. +// where the new samples are to be inserted). This function may be used for +// inserting new samples into the sample buffer directly. Please be careful! +// +// Parameter 'slackCapacity' tells the function how much free capacity (in +// terms of samples) there _at least_ should be, in order to the caller to +// successfully insert all the required samples to the buffer. When necessary, +// the function grows the buffer size to comply with this requirement. +// +// When using this function as means for inserting new samples, also remember +// to increase the sample count afterwards, by calling the +// 'putSamples(numSamples)' function. +SAMPLETYPE *FIFOSampleBuffer::ptrEnd(uint slackCapacity) +{ + ensureCapacity(samplesInBuffer + slackCapacity); + return buffer + samplesInBuffer * channels; +} + + +// Returns a pointer to the beginning of the currently non-outputted samples. +// This function is provided for accessing the output samples directly. +// Please be careful! +// +// When using this function to output samples, also remember to 'remove' the +// outputted samples from the buffer by calling the +// 'receiveSamples(numSamples)' function +SAMPLETYPE *FIFOSampleBuffer::ptrBegin() +{ + assert(buffer); + return buffer + bufferPos * channels; +} + + +// Ensures that the buffer has enough capacity, i.e. space for _at least_ +// 'capacityRequirement' number of samples. The buffer is grown in steps of +// 4 kilobytes to eliminate the need for frequently growing up the buffer, +// as well as to round the buffer size up to the virtual memory page size. +void FIFOSampleBuffer::ensureCapacity(uint capacityRequirement) +{ + SAMPLETYPE *tempUnaligned, *temp; + + if (capacityRequirement > getCapacity()) + { + // enlarge the buffer in 4kbyte steps (round up to next 4k boundary) + sizeInBytes = (capacityRequirement * channels * sizeof(SAMPLETYPE) + 4095) & (uint)-4096; + assert(sizeInBytes % 2 == 0); + tempUnaligned = new SAMPLETYPE[sizeInBytes / sizeof(SAMPLETYPE) + 16 / sizeof(SAMPLETYPE)]; + if (tempUnaligned == NULL) + { + ST_THROW_RT_ERROR("Couldn't allocate memory!\n"); + } + // Align the buffer to begin at 16byte cache line boundary for optimal performance + temp = (SAMPLETYPE *)SOUNDTOUCH_ALIGN_POINTER_16(tempUnaligned); + if (samplesInBuffer) + { + memcpy(temp, ptrBegin(), samplesInBuffer * channels * sizeof(SAMPLETYPE)); + } + delete[] bufferUnaligned; + buffer = temp; + bufferUnaligned = tempUnaligned; + bufferPos = 0; + } + else + { + // simply rewind the buffer (if necessary) + rewind(); + } +} + + +// Returns the current buffer capacity in terms of samples +uint FIFOSampleBuffer::getCapacity() const +{ + return sizeInBytes / (channels * sizeof(SAMPLETYPE)); +} + + +// Returns the number of samples currently in the buffer +uint FIFOSampleBuffer::numSamples() const +{ + return samplesInBuffer; +} + + +// Output samples from beginning of the sample buffer. Copies demanded number +// of samples to output and removes them from the sample buffer. If there +// are less than 'numsample' samples in the buffer, returns all available. +// +// Returns number of samples copied. +uint FIFOSampleBuffer::receiveSamples(SAMPLETYPE *output, uint maxSamples) +{ + uint num; + + num = (maxSamples > samplesInBuffer) ? samplesInBuffer : maxSamples; + + memcpy(output, ptrBegin(), channels * sizeof(SAMPLETYPE) * num); + return receiveSamples(num); +} + + +// Removes samples from the beginning of the sample buffer without copying them +// anywhere. Used to reduce the number of samples in the buffer, when accessing +// the sample buffer with the 'ptrBegin' function. +uint FIFOSampleBuffer::receiveSamples(uint maxSamples) +{ + if (maxSamples >= samplesInBuffer) + { + uint temp; + + temp = samplesInBuffer; + samplesInBuffer = 0; + return temp; + } + + samplesInBuffer -= maxSamples; + bufferPos += maxSamples; + + return maxSamples; +} + + +// Returns nonzero if the sample buffer is empty +int FIFOSampleBuffer::isEmpty() const +{ + return (samplesInBuffer == 0) ? 1 : 0; +} + + +// Clears the sample buffer +void FIFOSampleBuffer::clear() +{ + samplesInBuffer = 0; + bufferPos = 0; +} + + +/// allow trimming (downwards) amount of samples in pipeline. +/// Returns adjusted amount of samples +uint FIFOSampleBuffer::adjustAmountOfSamples(uint numSamples) +{ + if (numSamples < samplesInBuffer) + { + samplesInBuffer = numSamples; + } + return samplesInBuffer; +} + + +/// Add silence to end of buffer +void FIFOSampleBuffer::addSilent(uint nSamples) +{ + memset(ptrEnd(nSamples), 0, sizeof(SAMPLETYPE) * nSamples * channels); + samplesInBuffer += nSamples; +} diff --git a/media/libsoundtouch/src/FIFOSampleBuffer.h b/media/libsoundtouch/src/FIFOSampleBuffer.h new file mode 100644 index 0000000000..537a7b8722 --- /dev/null +++ b/media/libsoundtouch/src/FIFOSampleBuffer.h @@ -0,0 +1,180 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// A buffer class for temporarily storaging sound samples, operates as a +/// first-in-first-out pipe. +/// +/// Samples are added to the end of the sample buffer with the 'putSamples' +/// function, and are received from the beginning of the buffer by calling +/// the 'receiveSamples' function. The class automatically removes the +/// output samples from the buffer as well as grows the storage size +/// whenever necessary. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef FIFOSampleBuffer_H +#define FIFOSampleBuffer_H + +#include "FIFOSamplePipe.h" + +namespace soundtouch +{ + +/// Sample buffer working in FIFO (first-in-first-out) principle. The class takes +/// care of storage size adjustment and data moving during input/output operations. +/// +/// Notice that in case of stereo audio, one sample is considered to consist of +/// both channel data. +class FIFOSampleBuffer : public FIFOSamplePipe +{ +private: + /// Sample buffer. + SAMPLETYPE *buffer; + + // Raw unaligned buffer memory. 'buffer' is made aligned by pointing it to first + // 16-byte aligned location of this buffer + SAMPLETYPE *bufferUnaligned; + + /// Sample buffer size in bytes + uint sizeInBytes; + + /// How many samples are currently in buffer. + uint samplesInBuffer; + + /// Channels, 1=mono, 2=stereo. + uint channels; + + /// Current position pointer to the buffer. This pointer is increased when samples are + /// removed from the pipe so that it's necessary to actually rewind buffer (move data) + /// only new data when is put to the pipe. + uint bufferPos; + + /// Rewind the buffer by moving data from position pointed by 'bufferPos' to real + /// beginning of the buffer. + void rewind(); + + /// Ensures that the buffer has capacity for at least this many samples. + void ensureCapacity(uint capacityRequirement); + + /// Returns current capacity. + uint getCapacity() const; + +public: + + /// Constructor + FIFOSampleBuffer(int numChannels = 2 ///< Number of channels, 1=mono, 2=stereo. + ///< Default is stereo. + ); + + /// destructor + ~FIFOSampleBuffer(); + + /// Returns a pointer to the beginning of the output samples. + /// This function is provided for accessing the output samples directly. + /// Please be careful for not to corrupt the book-keeping! + /// + /// When using this function to output samples, also remember to 'remove' the + /// output samples from the buffer by calling the + /// 'receiveSamples(numSamples)' function + virtual SAMPLETYPE *ptrBegin(); + + /// Returns a pointer to the end of the used part of the sample buffer (i.e. + /// where the new samples are to be inserted). This function may be used for + /// inserting new samples into the sample buffer directly. Please be careful + /// not corrupt the book-keeping! + /// + /// When using this function as means for inserting new samples, also remember + /// to increase the sample count afterwards, by calling the + /// 'putSamples(numSamples)' function. + SAMPLETYPE *ptrEnd( + uint slackCapacity ///< How much free capacity (in samples) there _at least_ + ///< should be so that the caller can successfully insert the + ///< desired samples to the buffer. If necessary, the function + ///< grows the buffer size to comply with this requirement. + ); + + /// Adds 'numSamples' pcs of samples from the 'samples' memory position to + /// the sample buffer. + virtual void putSamples(const SAMPLETYPE *samples, ///< Pointer to samples. + uint numSamples ///< Number of samples to insert. + ); + + /// Adjusts the book-keeping to increase number of samples in the buffer without + /// copying any actual samples. + /// + /// This function is used to update the number of samples in the sample buffer + /// when accessing the buffer directly with 'ptrEnd' function. Please be + /// careful though! + virtual void putSamples(uint numSamples ///< Number of samples been inserted. + ); + + /// Output samples from beginning of the sample buffer. Copies requested samples to + /// output buffer and removes them from the sample buffer. If there are less than + /// 'numsample' samples in the buffer, returns all that available. + /// + /// \return Number of samples returned. + virtual uint receiveSamples(SAMPLETYPE *output, ///< Buffer where to copy output samples. + uint maxSamples ///< How many samples to receive at max. + ); + + /// Adjusts book-keeping so that given number of samples are removed from beginning of the + /// sample buffer without copying them anywhere. + /// + /// Used to reduce the number of samples in the buffer when accessing the sample buffer directly + /// with 'ptrBegin' function. + virtual uint receiveSamples(uint maxSamples ///< Remove this many samples from the beginning of pipe. + ); + + /// Returns number of samples currently available. + virtual uint numSamples() const; + + /// Sets number of channels, 1 = mono, 2 = stereo. + void setChannels(int numChannels); + + /// Get number of channels + int getChannels() + { + return channels; + } + + /// Returns nonzero if there aren't any samples available for outputting. + virtual int isEmpty() const; + + /// Clears all the samples. + virtual void clear(); + + /// allow trimming (downwards) amount of samples in pipeline. + /// Returns adjusted amount of samples + uint adjustAmountOfSamples(uint numSamples); + + /// Add silence to end of buffer + void addSilent(uint nSamples); +}; + +} + +#endif diff --git a/media/libsoundtouch/src/FIFOSamplePipe.h b/media/libsoundtouch/src/FIFOSamplePipe.h new file mode 100644 index 0000000000..3def42d1ab --- /dev/null +++ b/media/libsoundtouch/src/FIFOSamplePipe.h @@ -0,0 +1,230 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// 'FIFOSamplePipe' : An abstract base class for classes that manipulate sound +/// samples by operating like a first-in-first-out pipe: New samples are fed +/// into one end of the pipe with the 'putSamples' function, and the processed +/// samples are received from the other end with the 'receiveSamples' function. +/// +/// 'FIFOProcessor' : A base class for classes the do signal processing with +/// the samples while operating like a first-in-first-out pipe. When samples +/// are input with the 'putSamples' function, the class processes them +/// and moves the processed samples to the given 'output' pipe object, which +/// may be either another processing stage, or a fifo sample buffer object. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef FIFOSamplePipe_H +#define FIFOSamplePipe_H + +#include <assert.h> +#include <stdlib.h> +#include "STTypes.h" + +namespace soundtouch +{ + +/// Abstract base class for FIFO (first-in-first-out) sample processing classes. +class FIFOSamplePipe +{ +protected: + + bool verifyNumberOfChannels(int nChannels) const + { + if ((nChannels > 0) && (nChannels <= SOUNDTOUCH_MAX_CHANNELS)) + { + return true; + } + ST_THROW_RT_ERROR("Error: Illegal number of channels"); + return false; + } + +public: + // virtual default destructor + virtual ~FIFOSamplePipe() {} + + + /// Returns a pointer to the beginning of the output samples. + /// This function is provided for accessing the output samples directly. + /// Please be careful for not to corrupt the book-keeping! + /// + /// When using this function to output samples, also remember to 'remove' the + /// output samples from the buffer by calling the + /// 'receiveSamples(numSamples)' function + virtual SAMPLETYPE *ptrBegin() = 0; + + /// Adds 'numSamples' pcs of samples from the 'samples' memory position to + /// the sample buffer. + virtual void putSamples(const SAMPLETYPE *samples, ///< Pointer to samples. + uint numSamples ///< Number of samples to insert. + ) = 0; + + + // Moves samples from the 'other' pipe instance to this instance. + void moveSamples(FIFOSamplePipe &other ///< Other pipe instance where from the receive the data. + ) + { + int oNumSamples = other.numSamples(); + + putSamples(other.ptrBegin(), oNumSamples); + other.receiveSamples(oNumSamples); + }; + + /// Output samples from beginning of the sample buffer. Copies requested samples to + /// output buffer and removes them from the sample buffer. If there are less than + /// 'numsample' samples in the buffer, returns all that available. + /// + /// \return Number of samples returned. + virtual uint receiveSamples(SAMPLETYPE *output, ///< Buffer where to copy output samples. + uint maxSamples ///< How many samples to receive at max. + ) = 0; + + /// Adjusts book-keeping so that given number of samples are removed from beginning of the + /// sample buffer without copying them anywhere. + /// + /// Used to reduce the number of samples in the buffer when accessing the sample buffer directly + /// with 'ptrBegin' function. + virtual uint receiveSamples(uint maxSamples ///< Remove this many samples from the beginning of pipe. + ) = 0; + + /// Returns number of samples currently available. + virtual uint numSamples() const = 0; + + // Returns nonzero if there aren't any samples available for outputting. + virtual int isEmpty() const = 0; + + /// Clears all the samples. + virtual void clear() = 0; + + /// allow trimming (downwards) amount of samples in pipeline. + /// Returns adjusted amount of samples + virtual uint adjustAmountOfSamples(uint numSamples) = 0; + +}; + + +/// Base-class for sound processing routines working in FIFO principle. With this base +/// class it's easy to implement sound processing stages that can be chained together, +/// so that samples that are fed into beginning of the pipe automatically go through +/// all the processing stages. +/// +/// When samples are input to this class, they're first processed and then put to +/// the FIFO pipe that's defined as output of this class. This output pipe can be +/// either other processing stage or a FIFO sample buffer. +class FIFOProcessor :public FIFOSamplePipe +{ +protected: + /// Internal pipe where processed samples are put. + FIFOSamplePipe *output; + + /// Sets output pipe. + void setOutPipe(FIFOSamplePipe *pOutput) + { + assert(output == NULL); + assert(pOutput != NULL); + output = pOutput; + } + + /// Constructor. Doesn't define output pipe; it has to be set be + /// 'setOutPipe' function. + FIFOProcessor() + { + output = NULL; + } + + /// Constructor. Configures output pipe. + FIFOProcessor(FIFOSamplePipe *pOutput ///< Output pipe. + ) + { + output = pOutput; + } + + /// Destructor. + virtual ~FIFOProcessor() + { + } + + /// Returns a pointer to the beginning of the output samples. + /// This function is provided for accessing the output samples directly. + /// Please be careful for not to corrupt the book-keeping! + /// + /// When using this function to output samples, also remember to 'remove' the + /// output samples from the buffer by calling the + /// 'receiveSamples(numSamples)' function + virtual SAMPLETYPE *ptrBegin() + { + return output->ptrBegin(); + } + +public: + + /// Output samples from beginning of the sample buffer. Copies requested samples to + /// output buffer and removes them from the sample buffer. If there are less than + /// 'numsample' samples in the buffer, returns all that available. + /// + /// \return Number of samples returned. + virtual uint receiveSamples(SAMPLETYPE *outBuffer, ///< Buffer where to copy output samples. + uint maxSamples ///< How many samples to receive at max. + ) + { + return output->receiveSamples(outBuffer, maxSamples); + } + + /// Adjusts book-keeping so that given number of samples are removed from beginning of the + /// sample buffer without copying them anywhere. + /// + /// Used to reduce the number of samples in the buffer when accessing the sample buffer directly + /// with 'ptrBegin' function. + virtual uint receiveSamples(uint maxSamples ///< Remove this many samples from the beginning of pipe. + ) + { + return output->receiveSamples(maxSamples); + } + + /// Returns number of samples currently available. + virtual uint numSamples() const + { + return output->numSamples(); + } + + /// Returns nonzero if there aren't any samples available for outputting. + virtual int isEmpty() const + { + return output->isEmpty(); + } + + /// allow trimming (downwards) amount of samples in pipeline. + /// Returns adjusted amount of samples + virtual uint adjustAmountOfSamples(uint numSamples) + { + return output->adjustAmountOfSamples(numSamples); + } +}; + +} + +#endif diff --git a/media/libsoundtouch/src/FIRFilter.cpp b/media/libsoundtouch/src/FIRFilter.cpp new file mode 100644 index 0000000000..201395bd51 --- /dev/null +++ b/media/libsoundtouch/src/FIRFilter.cpp @@ -0,0 +1,331 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// General FIR digital filter routines with MMX optimization. +/// +/// Notes : MMX optimized functions reside in a separate, platform-specific file, +/// e.g. 'mmx_win.cpp' or 'mmx_gcc.cpp' +/// +/// This source file contains OpenMP optimizations that allow speeding up the +/// corss-correlation algorithm by executing it in several threads / CPU cores +/// in parallel. See the following article link for more detailed discussion +/// about SoundTouch OpenMP optimizations: +/// http://www.softwarecoven.com/parallel-computing-in-embedded-mobile-devices +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <memory.h> +#include <assert.h> +#include <math.h> +#include <stdlib.h> +#include "FIRFilter.h" +#include "cpu_detect.h" + +using namespace soundtouch; + +/***************************************************************************** + * + * Implementation of the class 'FIRFilter' + * + *****************************************************************************/ + +FIRFilter::FIRFilter() +{ + resultDivFactor = 0; + resultDivider = 0; + length = 0; + lengthDiv8 = 0; + filterCoeffs = NULL; + filterCoeffsStereo = NULL; +} + + +FIRFilter::~FIRFilter() +{ + delete[] filterCoeffs; + delete[] filterCoeffsStereo; +} + + +// Usual C-version of the filter routine for stereo sound +uint FIRFilter::evaluateFilterStereo(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples) const +{ + int j, end; +#ifdef SOUNDTOUCH_FLOAT_SAMPLES + // when using floating point samples, use a scaler instead of a divider + // because division is much slower operation than multiplying. + double dScaler = 1.0 / (double)resultDivider; +#endif + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = length & -8; + + assert((length != 0) && (length == ilength) && (src != NULL) && (dest != NULL) && (filterCoeffs != NULL)); + + end = 2 * (numSamples - ilength); + + #pragma omp parallel for + for (j = 0; j < end; j += 2) + { + const SAMPLETYPE *ptr; + LONG_SAMPLETYPE suml, sumr; + + suml = sumr = 0; + ptr = src + j; + + for (int i = 0; i < ilength; i ++) + { + suml += ptr[2 * i] * filterCoeffsStereo[2 * i]; + sumr += ptr[2 * i + 1] * filterCoeffsStereo[2 * i + 1]; + } + +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + suml >>= resultDivFactor; + sumr >>= resultDivFactor; + // saturate to 16 bit integer limits + suml = (suml < -32768) ? -32768 : (suml > 32767) ? 32767 : suml; + // saturate to 16 bit integer limits + sumr = (sumr < -32768) ? -32768 : (sumr > 32767) ? 32767 : sumr; +#endif // SOUNDTOUCH_INTEGER_SAMPLES + dest[j] = (SAMPLETYPE)suml; + dest[j + 1] = (SAMPLETYPE)sumr; + } + return numSamples - ilength; +} + + +// Usual C-version of the filter routine for mono sound +uint FIRFilter::evaluateFilterMono(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples) const +{ + int j, end; +#ifdef SOUNDTOUCH_FLOAT_SAMPLES + // when using floating point samples, use a scaler instead of a divider + // because division is much slower operation than multiplying. + double dScaler = 1.0 / (double)resultDivider; +#endif + + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = length & -8; + + assert(ilength != 0); + + end = numSamples - ilength; + #pragma omp parallel for + for (j = 0; j < end; j ++) + { + const SAMPLETYPE *pSrc = src + j; + LONG_SAMPLETYPE sum; + int i; + + sum = 0; + for (i = 0; i < ilength; i ++) + { + sum += pSrc[i] * filterCoeffs[i]; + } +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + sum >>= resultDivFactor; + // saturate to 16 bit integer limits + sum = (sum < -32768) ? -32768 : (sum > 32767) ? 32767 : sum; +#endif // SOUNDTOUCH_INTEGER_SAMPLES + dest[j] = (SAMPLETYPE)sum; + } + return end; +} + + +uint FIRFilter::evaluateFilterMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples, uint numChannels) +{ + int j, end; + +#ifdef SOUNDTOUCH_FLOAT_SAMPLES + // when using floating point samples, use a scaler instead of a divider + // because division is much slower operation than multiplying. + double dScaler = 1.0 / (double)resultDivider; +#endif + + assert(length != 0); + assert(src != NULL); + assert(dest != NULL); + assert(filterCoeffs != NULL); + assert(numChannels < 16); + + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = length & -8; + + end = numChannels * (numSamples - ilength); + + #pragma omp parallel for + for (j = 0; j < end; j += numChannels) + { + const SAMPLETYPE *ptr; + LONG_SAMPLETYPE sums[16]; + uint c; + int i; + + for (c = 0; c < numChannels; c ++) + { + sums[c] = 0; + } + + ptr = src + j; + + for (i = 0; i < ilength; i ++) + { + SAMPLETYPE coef=filterCoeffs[i]; + for (c = 0; c < numChannels; c ++) + { + sums[c] += ptr[0] * coef; + ptr ++; + } + } + + for (c = 0; c < numChannels; c ++) + { +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + sums[c] >>= resultDivFactor; +#endif // SOUNDTOUCH_INTEGER_SAMPLES + dest[j+c] = (SAMPLETYPE)sums[c]; + } + } + return numSamples - ilength; +} + + +// Set filter coeffiecients and length. +// +// Throws an exception if filter length isn't divisible by 8 +void FIRFilter::setCoefficients(const SAMPLETYPE *coeffs, uint newLength, uint uResultDivFactor) +{ + assert(newLength > 0); + if (newLength % 8) ST_THROW_RT_ERROR("FIR filter length not divisible by 8"); + + #ifdef SOUNDTOUCH_FLOAT_SAMPLES + // scale coefficients already here if using floating samples + double scale = 1.0 / resultDivider; + #else + short scale = 1; + #endif + + lengthDiv8 = newLength / 8; + length = lengthDiv8 * 8; + assert(length == newLength); + + resultDivFactor = uResultDivFactor; + resultDivider = (SAMPLETYPE)::pow(2.0, (int)resultDivFactor); + + delete[] filterCoeffs; + filterCoeffs = new SAMPLETYPE[length]; + delete[] filterCoeffsStereo; + filterCoeffsStereo = new SAMPLETYPE[length*2]; + for (uint i = 0; i < length; i ++) + { + filterCoeffs[i] = (SAMPLETYPE)(coeffs[i] * scale); + // create also stereo set of filter coefficients: this allows compiler + // to autovectorize filter evaluation much more efficiently + filterCoeffsStereo[2 * i] = (SAMPLETYPE)(coeffs[i] * scale); + filterCoeffsStereo[2 * i + 1] = (SAMPLETYPE)(coeffs[i] * scale); + } +} + + +uint FIRFilter::getLength() const +{ + return length; +} + + +// Applies the filter to the given sequence of samples. +// +// Note : The amount of outputted samples is by value of 'filter_length' +// smaller than the amount of input samples. +uint FIRFilter::evaluate(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples, uint numChannels) +{ + assert(length > 0); + assert(lengthDiv8 * 8 == length); + + if (numSamples < length) return 0; + +#ifndef USE_MULTICH_ALWAYS + if (numChannels == 1) + { + return evaluateFilterMono(dest, src, numSamples); + } + else if (numChannels == 2) + { + return evaluateFilterStereo(dest, src, numSamples); + } + else +#endif // USE_MULTICH_ALWAYS + { + assert(numChannels > 0); + return evaluateFilterMulti(dest, src, numSamples, numChannels); + } +} + + +// Operator 'new' is overloaded so that it automatically creates a suitable instance +// depending on if we've a MMX-capable CPU available or not. +void * FIRFilter::operator new(size_t s) +{ + // Notice! don't use "new FIRFilter" directly, use "newInstance" to create a new instance instead! + ST_THROW_RT_ERROR("Error in FIRFilter::new: Don't use 'new FIRFilter', use 'newInstance' member instead!"); + return newInstance(); +} + + +FIRFilter * FIRFilter::newInstance() +{ +#if defined(SOUNDTOUCH_ALLOW_MMX) || defined(SOUNDTOUCH_ALLOW_SSE) + uint uExtensions; + + uExtensions = detectCPUextensions(); +#endif + + // Check if MMX/SSE instruction set extensions supported by CPU + +#ifdef SOUNDTOUCH_ALLOW_MMX + // MMX routines available only with integer sample types + if (uExtensions & SUPPORT_MMX) + { + return ::new FIRFilterMMX; + } + else +#endif // SOUNDTOUCH_ALLOW_MMX + +#ifdef SOUNDTOUCH_ALLOW_SSE + if (uExtensions & SUPPORT_SSE) + { + // SSE support + return ::new FIRFilterSSE; + } + else +#endif // SOUNDTOUCH_ALLOW_SSE + + { + // ISA optimizations not supported, use plain C version + return ::new FIRFilter; + } +} diff --git a/media/libsoundtouch/src/FIRFilter.h b/media/libsoundtouch/src/FIRFilter.h new file mode 100644 index 0000000000..39c2cc7542 --- /dev/null +++ b/media/libsoundtouch/src/FIRFilter.h @@ -0,0 +1,140 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// General FIR digital filter routines with MMX optimization. +/// +/// Note : MMX optimized functions reside in a separate, platform-specific file, +/// e.g. 'mmx_win.cpp' or 'mmx_gcc.cpp' +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef FIRFilter_H +#define FIRFilter_H + +#include <stddef.h> +#include "STTypes.h" + +namespace soundtouch +{ + +class FIRFilter +{ +protected: + // Number of FIR filter taps + uint length; + // Number of FIR filter taps divided by 8 + uint lengthDiv8; + + // Result divider factor in 2^k format + uint resultDivFactor; + + // Result divider value. + SAMPLETYPE resultDivider; + + // Memory for filter coefficients + SAMPLETYPE *filterCoeffs; + SAMPLETYPE *filterCoeffsStereo; + + virtual uint evaluateFilterStereo(SAMPLETYPE *dest, + const SAMPLETYPE *src, + uint numSamples) const; + virtual uint evaluateFilterMono(SAMPLETYPE *dest, + const SAMPLETYPE *src, + uint numSamples) const; + virtual uint evaluateFilterMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples, uint numChannels); + +public: + FIRFilter(); + virtual ~FIRFilter(); + + /// Operator 'new' is overloaded so that it automatically creates a suitable instance + /// depending on if we've a MMX-capable CPU available or not. + static void * operator new(size_t s); + + static FIRFilter *newInstance(); + + /// Applies the filter to the given sequence of samples. + /// Note : The amount of outputted samples is by value of 'filter_length' + /// smaller than the amount of input samples. + /// + /// \return Number of samples copied to 'dest'. + uint evaluate(SAMPLETYPE *dest, + const SAMPLETYPE *src, + uint numSamples, + uint numChannels); + + uint getLength() const; + + virtual void setCoefficients(const SAMPLETYPE *coeffs, + uint newLength, + uint uResultDivFactor); +}; + + +// Optional subclasses that implement CPU-specific optimizations: + +#ifdef SOUNDTOUCH_ALLOW_MMX + +/// Class that implements MMX optimized functions exclusive for 16bit integer samples type. + class FIRFilterMMX : public FIRFilter + { + protected: + short *filterCoeffsUnalign; + short *filterCoeffsAlign; + + virtual uint evaluateFilterStereo(short *dest, const short *src, uint numSamples) const; + public: + FIRFilterMMX(); + ~FIRFilterMMX(); + + virtual void setCoefficients(const short *coeffs, uint newLength, uint uResultDivFactor); + }; + +#endif // SOUNDTOUCH_ALLOW_MMX + + +#ifdef SOUNDTOUCH_ALLOW_SSE + /// Class that implements SSE optimized functions exclusive for floating point samples type. + class FIRFilterSSE : public FIRFilter + { + protected: + float *filterCoeffsUnalign; + float *filterCoeffsAlign; + + virtual uint evaluateFilterStereo(float *dest, const float *src, uint numSamples) const; + public: + FIRFilterSSE(); + ~FIRFilterSSE(); + + virtual void setCoefficients(const float *coeffs, uint newLength, uint uResultDivFactor); + }; + +#endif // SOUNDTOUCH_ALLOW_SSE + +} + +#endif // FIRFilter_H diff --git a/media/libsoundtouch/src/InterpolateCubic.cpp b/media/libsoundtouch/src/InterpolateCubic.cpp new file mode 100644 index 0000000000..b37b0fa801 --- /dev/null +++ b/media/libsoundtouch/src/InterpolateCubic.cpp @@ -0,0 +1,196 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Cubic interpolation routine. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <stddef.h> +#include <math.h> +#include "InterpolateCubic.h" +#include "STTypes.h" + +using namespace soundtouch; + +// cubic interpolation coefficients +static const float _coeffs[]= +{ -0.5f, 1.0f, -0.5f, 0.0f, + 1.5f, -2.5f, 0.0f, 1.0f, + -1.5f, 2.0f, 0.5f, 0.0f, + 0.5f, -0.5f, 0.0f, 0.0f}; + + +InterpolateCubic::InterpolateCubic() +{ + fract = 0; +} + + +void InterpolateCubic::resetRegisters() +{ + fract = 0; +} + + +/// Transpose mono audio. Returns number of produced output samples, and +/// updates "srcSamples" to amount of consumed source samples +int InterpolateCubic::transposeMono(SAMPLETYPE *pdest, + const SAMPLETYPE *psrc, + int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 4; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + float out; + const float x3 = 1.0f; + const float x2 = (float)fract; // x + const float x1 = x2*x2; // x^2 + const float x0 = x1*x2; // x^3 + float y0, y1, y2, y3; + + assert(fract < 1.0); + + y0 = _coeffs[0] * x0 + _coeffs[1] * x1 + _coeffs[2] * x2 + _coeffs[3] * x3; + y1 = _coeffs[4] * x0 + _coeffs[5] * x1 + _coeffs[6] * x2 + _coeffs[7] * x3; + y2 = _coeffs[8] * x0 + _coeffs[9] * x1 + _coeffs[10] * x2 + _coeffs[11] * x3; + y3 = _coeffs[12] * x0 + _coeffs[13] * x1 + _coeffs[14] * x2 + _coeffs[15] * x3; + + out = y0 * psrc[0] + y1 * psrc[1] + y2 * psrc[2] + y3 * psrc[3]; + + pdest[i] = (SAMPLETYPE)out; + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + psrc += whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} + + +/// Transpose stereo audio. Returns number of produced output samples, and +/// updates "srcSamples" to amount of consumed source samples +int InterpolateCubic::transposeStereo(SAMPLETYPE *pdest, + const SAMPLETYPE *psrc, + int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 4; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + const float x3 = 1.0f; + const float x2 = (float)fract; // x + const float x1 = x2*x2; // x^2 + const float x0 = x1*x2; // x^3 + float y0, y1, y2, y3; + float out0, out1; + + assert(fract < 1.0); + + y0 = _coeffs[0] * x0 + _coeffs[1] * x1 + _coeffs[2] * x2 + _coeffs[3] * x3; + y1 = _coeffs[4] * x0 + _coeffs[5] * x1 + _coeffs[6] * x2 + _coeffs[7] * x3; + y2 = _coeffs[8] * x0 + _coeffs[9] * x1 + _coeffs[10] * x2 + _coeffs[11] * x3; + y3 = _coeffs[12] * x0 + _coeffs[13] * x1 + _coeffs[14] * x2 + _coeffs[15] * x3; + + out0 = y0 * psrc[0] + y1 * psrc[2] + y2 * psrc[4] + y3 * psrc[6]; + out1 = y0 * psrc[1] + y1 * psrc[3] + y2 * psrc[5] + y3 * psrc[7]; + + pdest[2*i] = (SAMPLETYPE)out0; + pdest[2*i+1] = (SAMPLETYPE)out1; + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + psrc += 2*whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} + + +/// Transpose multi-channel audio. Returns number of produced output samples, and +/// updates "srcSamples" to amount of consumed source samples +int InterpolateCubic::transposeMulti(SAMPLETYPE *pdest, + const SAMPLETYPE *psrc, + int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 4; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + const float x3 = 1.0f; + const float x2 = (float)fract; // x + const float x1 = x2*x2; // x^2 + const float x0 = x1*x2; // x^3 + float y0, y1, y2, y3; + + assert(fract < 1.0); + + y0 = _coeffs[0] * x0 + _coeffs[1] * x1 + _coeffs[2] * x2 + _coeffs[3] * x3; + y1 = _coeffs[4] * x0 + _coeffs[5] * x1 + _coeffs[6] * x2 + _coeffs[7] * x3; + y2 = _coeffs[8] * x0 + _coeffs[9] * x1 + _coeffs[10] * x2 + _coeffs[11] * x3; + y3 = _coeffs[12] * x0 + _coeffs[13] * x1 + _coeffs[14] * x2 + _coeffs[15] * x3; + + for (int c = 0; c < numChannels; c ++) + { + float out; + out = y0 * psrc[c] + y1 * psrc[c + numChannels] + y2 * psrc[c + 2 * numChannels] + y3 * psrc[c + 3 * numChannels]; + pdest[0] = (SAMPLETYPE)out; + pdest ++; + } + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + psrc += numChannels*whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} diff --git a/media/libsoundtouch/src/InterpolateCubic.h b/media/libsoundtouch/src/InterpolateCubic.h new file mode 100644 index 0000000000..481abd64bc --- /dev/null +++ b/media/libsoundtouch/src/InterpolateCubic.h @@ -0,0 +1,69 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Cubic interpolation routine. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef _InterpolateCubic_H_ +#define _InterpolateCubic_H_ + +#include "RateTransposer.h" +#include "STTypes.h" + +namespace soundtouch +{ + +class InterpolateCubic : public TransposerBase +{ +protected: + virtual int transposeMono(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + virtual int transposeStereo(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + virtual int transposeMulti(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + + double fract; + +public: + InterpolateCubic(); + + virtual void resetRegisters(); + + int getLatency() const + { + return 1; + } +}; + +} + +#endif diff --git a/media/libsoundtouch/src/InterpolateLinear.cpp b/media/libsoundtouch/src/InterpolateLinear.cpp new file mode 100644 index 0000000000..9533e79b79 --- /dev/null +++ b/media/libsoundtouch/src/InterpolateLinear.cpp @@ -0,0 +1,296 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Linear interpolation algorithm. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <assert.h> +#include <stdlib.h> +#include "InterpolateLinear.h" + +using namespace soundtouch; + +////////////////////////////////////////////////////////////////////////////// +// +// InterpolateLinearInteger - integer arithmetic implementation +// + +/// fixed-point interpolation routine precision +#define SCALE 65536 + + +// Constructor +InterpolateLinearInteger::InterpolateLinearInteger() : TransposerBase() +{ + // Notice: use local function calling syntax for sake of clarity, + // to indicate the fact that C++ constructor can't call virtual functions. + resetRegisters(); + setRate(1.0f); +} + + +void InterpolateLinearInteger::resetRegisters() +{ + iFract = 0; +} + + +// Transposes the sample rate of the given samples using linear interpolation. +// 'Mono' version of the routine. Returns the number of samples returned in +// the "dest" buffer +int InterpolateLinearInteger::transposeMono(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 1; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + LONG_SAMPLETYPE temp; + + assert(iFract < SCALE); + + temp = (SCALE - iFract) * src[0] + iFract * src[1]; + dest[i] = (SAMPLETYPE)(temp / SCALE); + i++; + + iFract += iRate; + + int iWhole = iFract / SCALE; + iFract -= iWhole * SCALE; + srcCount += iWhole; + src += iWhole; + } + srcSamples = srcCount; + + return i; +} + + +// Transposes the sample rate of the given samples using linear interpolation. +// 'Stereo' version of the routine. Returns the number of samples returned in +// the "dest" buffer +int InterpolateLinearInteger::transposeStereo(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 1; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + LONG_SAMPLETYPE temp0; + LONG_SAMPLETYPE temp1; + + assert(iFract < SCALE); + + temp0 = (SCALE - iFract) * src[0] + iFract * src[2]; + temp1 = (SCALE - iFract) * src[1] + iFract * src[3]; + dest[0] = (SAMPLETYPE)(temp0 / SCALE); + dest[1] = (SAMPLETYPE)(temp1 / SCALE); + dest += 2; + i++; + + iFract += iRate; + + int iWhole = iFract / SCALE; + iFract -= iWhole * SCALE; + srcCount += iWhole; + src += 2*iWhole; + } + srcSamples = srcCount; + + return i; +} + + +int InterpolateLinearInteger::transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 1; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + LONG_SAMPLETYPE temp, vol1; + + assert(iFract < SCALE); + vol1 = (LONG_SAMPLETYPE)(SCALE - iFract); + for (int c = 0; c < numChannels; c ++) + { + temp = vol1 * src[c] + iFract * src[c + numChannels]; + dest[0] = (SAMPLETYPE)(temp / SCALE); + dest ++; + } + i++; + + iFract += iRate; + + int iWhole = iFract / SCALE; + iFract -= iWhole * SCALE; + srcCount += iWhole; + src += iWhole * numChannels; + } + srcSamples = srcCount; + + return i; +} + + +// Sets new target iRate. Normal iRate = 1.0, smaller values represent slower +// iRate, larger faster iRates. +void InterpolateLinearInteger::setRate(double newRate) +{ + iRate = (int)(newRate * SCALE + 0.5); + TransposerBase::setRate(newRate); +} + + +////////////////////////////////////////////////////////////////////////////// +// +// InterpolateLinearFloat - floating point arithmetic implementation +// +////////////////////////////////////////////////////////////////////////////// + + +// Constructor +InterpolateLinearFloat::InterpolateLinearFloat() : TransposerBase() +{ + // Notice: use local function calling syntax for sake of clarity, + // to indicate the fact that C++ constructor can't call virtual functions. + resetRegisters(); + setRate(1.0); +} + + +void InterpolateLinearFloat::resetRegisters() +{ + fract = 0; +} + + +// Transposes the sample rate of the given samples using linear interpolation. +// 'Mono' version of the routine. Returns the number of samples returned in +// the "dest" buffer +int InterpolateLinearFloat::transposeMono(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 1; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + double out; + assert(fract < 1.0); + + out = (1.0 - fract) * src[0] + fract * src[1]; + dest[i] = (SAMPLETYPE)out; + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + src += whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} + + +// Transposes the sample rate of the given samples using linear interpolation. +// 'Mono' version of the routine. Returns the number of samples returned in +// the "dest" buffer +int InterpolateLinearFloat::transposeStereo(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 1; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + double out0, out1; + assert(fract < 1.0); + + out0 = (1.0 - fract) * src[0] + fract * src[2]; + out1 = (1.0 - fract) * src[1] + fract * src[3]; + dest[2*i] = (SAMPLETYPE)out0; + dest[2*i+1] = (SAMPLETYPE)out1; + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + src += 2*whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} + + +int InterpolateLinearFloat::transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 1; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + float temp, vol1, fract_float; + + vol1 = (float)(1.0 - fract); + fract_float = (float)fract; + for (int c = 0; c < numChannels; c ++) + { + temp = vol1 * src[c] + fract_float * src[c + numChannels]; + *dest = (SAMPLETYPE)temp; + dest ++; + } + i++; + + fract += rate; + + int iWhole = (int)fract; + fract -= iWhole; + srcCount += iWhole; + src += iWhole * numChannels; + } + srcSamples = srcCount; + + return i; +} diff --git a/media/libsoundtouch/src/InterpolateLinear.h b/media/libsoundtouch/src/InterpolateLinear.h new file mode 100644 index 0000000000..ff362e84b1 --- /dev/null +++ b/media/libsoundtouch/src/InterpolateLinear.h @@ -0,0 +1,98 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Linear interpolation routine. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef _InterpolateLinear_H_ +#define _InterpolateLinear_H_ + +#include "RateTransposer.h" +#include "STTypes.h" + +namespace soundtouch +{ + +/// Linear transposer class that uses integer arithmetic +class InterpolateLinearInteger : public TransposerBase +{ +protected: + int iFract; + int iRate; + + virtual int transposeMono(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + virtual int transposeStereo(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples); +public: + InterpolateLinearInteger(); + + /// Sets new target rate. Normal rate = 1.0, smaller values represent slower + /// rate, larger faster rates. + virtual void setRate(double newRate); + + virtual void resetRegisters(); + + int getLatency() const + { + return 0; + } +}; + + +/// Linear transposer class that uses floating point arithmetic +class InterpolateLinearFloat : public TransposerBase +{ +protected: + double fract; + + virtual int transposeMono(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + virtual int transposeStereo(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples); + +public: + InterpolateLinearFloat(); + + virtual void resetRegisters(); + + int getLatency() const + { + return 0; + } +}; + +} + +#endif diff --git a/media/libsoundtouch/src/InterpolateShannon.cpp b/media/libsoundtouch/src/InterpolateShannon.cpp new file mode 100644 index 0000000000..975d872ad6 --- /dev/null +++ b/media/libsoundtouch/src/InterpolateShannon.cpp @@ -0,0 +1,181 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Sample interpolation routine using 8-tap band-limited Shannon interpolation +/// with kaiser window. +/// +/// Notice. This algorithm is remarkably much heavier than linear or cubic +/// interpolation, and not remarkably better than cubic algorithm. Thus mostly +/// for experimental purposes +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <math.h> +#include "InterpolateShannon.h" +#include "STTypes.h" + +using namespace soundtouch; + + +/// Kaiser window with beta = 2.0 +/// Values scaled down by 5% to avoid overflows +static const double _kaiser8[8] = +{ + 0.41778693317814, + 0.64888025049173, + 0.83508562409944, + 0.93887857733412, + 0.93887857733412, + 0.83508562409944, + 0.64888025049173, + 0.41778693317814 +}; + + +InterpolateShannon::InterpolateShannon() +{ + fract = 0; +} + + +void InterpolateShannon::resetRegisters() +{ + fract = 0; +} + + +#define PI 3.1415926536 +#define sinc(x) (sin(PI * (x)) / (PI * (x))) + +/// Transpose mono audio. Returns number of produced output samples, and +/// updates "srcSamples" to amount of consumed source samples +int InterpolateShannon::transposeMono(SAMPLETYPE *pdest, + const SAMPLETYPE *psrc, + int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 8; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + double out; + assert(fract < 1.0); + + out = psrc[0] * sinc(-3.0 - fract) * _kaiser8[0]; + out += psrc[1] * sinc(-2.0 - fract) * _kaiser8[1]; + out += psrc[2] * sinc(-1.0 - fract) * _kaiser8[2]; + if (fract < 1e-6) + { + out += psrc[3] * _kaiser8[3]; // sinc(0) = 1 + } + else + { + out += psrc[3] * sinc(- fract) * _kaiser8[3]; + } + out += psrc[4] * sinc( 1.0 - fract) * _kaiser8[4]; + out += psrc[5] * sinc( 2.0 - fract) * _kaiser8[5]; + out += psrc[6] * sinc( 3.0 - fract) * _kaiser8[6]; + out += psrc[7] * sinc( 4.0 - fract) * _kaiser8[7]; + + pdest[i] = (SAMPLETYPE)out; + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + psrc += whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} + + +/// Transpose stereo audio. Returns number of produced output samples, and +/// updates "srcSamples" to amount of consumed source samples +int InterpolateShannon::transposeStereo(SAMPLETYPE *pdest, + const SAMPLETYPE *psrc, + int &srcSamples) +{ + int i; + int srcSampleEnd = srcSamples - 8; + int srcCount = 0; + + i = 0; + while (srcCount < srcSampleEnd) + { + double out0, out1, w; + assert(fract < 1.0); + + w = sinc(-3.0 - fract) * _kaiser8[0]; + out0 = psrc[0] * w; out1 = psrc[1] * w; + w = sinc(-2.0 - fract) * _kaiser8[1]; + out0 += psrc[2] * w; out1 += psrc[3] * w; + w = sinc(-1.0 - fract) * _kaiser8[2]; + out0 += psrc[4] * w; out1 += psrc[5] * w; + w = _kaiser8[3] * ((fract < 1e-5) ? 1.0 : sinc(- fract)); // sinc(0) = 1 + out0 += psrc[6] * w; out1 += psrc[7] * w; + w = sinc( 1.0 - fract) * _kaiser8[4]; + out0 += psrc[8] * w; out1 += psrc[9] * w; + w = sinc( 2.0 - fract) * _kaiser8[5]; + out0 += psrc[10] * w; out1 += psrc[11] * w; + w = sinc( 3.0 - fract) * _kaiser8[6]; + out0 += psrc[12] * w; out1 += psrc[13] * w; + w = sinc( 4.0 - fract) * _kaiser8[7]; + out0 += psrc[14] * w; out1 += psrc[15] * w; + + pdest[2*i] = (SAMPLETYPE)out0; + pdest[2*i+1] = (SAMPLETYPE)out1; + i ++; + + // update position fraction + fract += rate; + // update whole positions + int whole = (int)fract; + fract -= whole; + psrc += 2*whole; + srcCount += whole; + } + srcSamples = srcCount; + return i; +} + + +/// Transpose stereo audio. Returns number of produced output samples, and +/// updates "srcSamples" to amount of consumed source samples +int InterpolateShannon::transposeMulti(SAMPLETYPE *pdest, + const SAMPLETYPE *psrc, + int &srcSamples) +{ + // not implemented + assert(false); + return 0; +} diff --git a/media/libsoundtouch/src/InterpolateShannon.h b/media/libsoundtouch/src/InterpolateShannon.h new file mode 100644 index 0000000000..72ab0b526d --- /dev/null +++ b/media/libsoundtouch/src/InterpolateShannon.h @@ -0,0 +1,74 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Sample interpolation routine using 8-tap band-limited Shannon interpolation +/// with kaiser window. +/// +/// Notice. This algorithm is remarkably much heavier than linear or cubic +/// interpolation, and not remarkably better than cubic algorithm. Thus mostly +/// for experimental purposes +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef _InterpolateShannon_H_ +#define _InterpolateShannon_H_ + +#include "RateTransposer.h" +#include "STTypes.h" + +namespace soundtouch +{ + +class InterpolateShannon : public TransposerBase +{ +protected: + int transposeMono(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + int transposeStereo(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + int transposeMulti(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples); + + double fract; + +public: + InterpolateShannon(); + + void resetRegisters(); + + int getLatency() const + { + return 3; + } +}; + +} + +#endif diff --git a/media/libsoundtouch/src/RateTransposer.cpp b/media/libsoundtouch/src/RateTransposer.cpp new file mode 100644 index 0000000000..4c202391e0 --- /dev/null +++ b/media/libsoundtouch/src/RateTransposer.cpp @@ -0,0 +1,315 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Sample rate transposer. Changes sample rate by using linear interpolation +/// together with anti-alias filtering (first order interpolation with anti- +/// alias filtering should be quite adequate for this application) +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <memory.h> +#include <assert.h> +#include <stdlib.h> +#include <stdio.h> +#include "RateTransposer.h" +#include "InterpolateLinear.h" +#include "InterpolateCubic.h" +#include "InterpolateShannon.h" +#include "AAFilter.h" + +using namespace soundtouch; + +// Define default interpolation algorithm here +TransposerBase::ALGORITHM TransposerBase::algorithm = TransposerBase::CUBIC; + + +// Constructor +RateTransposer::RateTransposer() : FIFOProcessor(&outputBuffer) +{ + bUseAAFilter = +#ifndef SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER + true; +#else + // Disable Anti-alias filter if desirable to avoid click at rate change zero value crossover + false; +#endif + + // Instantiates the anti-alias filter + pAAFilter = new AAFilter(64); + pTransposer = TransposerBase::newInstance(); + clear(); +} + + +RateTransposer::~RateTransposer() +{ + delete pAAFilter; + delete pTransposer; +} + + +/// Enables/disables the anti-alias filter. Zero to disable, nonzero to enable +void RateTransposer::enableAAFilter(bool newMode) +{ +#ifndef SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER + // Disable Anti-alias filter if desirable to avoid click at rate change zero value crossover + bUseAAFilter = newMode; + clear(); +#endif +} + + +/// Returns nonzero if anti-alias filter is enabled. +bool RateTransposer::isAAFilterEnabled() const +{ + return bUseAAFilter; +} + + +AAFilter *RateTransposer::getAAFilter() +{ + return pAAFilter; +} + + +// Sets new target iRate. Normal iRate = 1.0, smaller values represent slower +// iRate, larger faster iRates. +void RateTransposer::setRate(double newRate) +{ + double fCutoff; + + pTransposer->setRate(newRate); + + // design a new anti-alias filter + if (newRate > 1.0) + { + fCutoff = 0.5 / newRate; + } + else + { + fCutoff = 0.5 * newRate; + } + pAAFilter->setCutoffFreq(fCutoff); +} + + +// Adds 'nSamples' pcs of samples from the 'samples' memory position into +// the input of the object. +void RateTransposer::putSamples(const SAMPLETYPE *samples, uint nSamples) +{ + processSamples(samples, nSamples); +} + + +// Transposes sample rate by applying anti-alias filter to prevent folding. +// Returns amount of samples returned in the "dest" buffer. +// The maximum amount of samples that can be returned at a time is set by +// the 'set_returnBuffer_size' function. +void RateTransposer::processSamples(const SAMPLETYPE *src, uint nSamples) +{ + uint count; + + if (nSamples == 0) return; + + // Store samples to input buffer + inputBuffer.putSamples(src, nSamples); + + // If anti-alias filter is turned off, simply transpose without applying + // the filter + if (bUseAAFilter == false) + { + count = pTransposer->transpose(outputBuffer, inputBuffer); + return; + } + + assert(pAAFilter); + + // Transpose with anti-alias filter + if (pTransposer->rate < 1.0f) + { + // If the parameter 'Rate' value is smaller than 1, first transpose + // the samples and then apply the anti-alias filter to remove aliasing. + + // Transpose the samples, store the result to end of "midBuffer" + pTransposer->transpose(midBuffer, inputBuffer); + + // Apply the anti-alias filter for transposed samples in midBuffer + pAAFilter->evaluate(outputBuffer, midBuffer); + } + else + { + // If the parameter 'Rate' value is larger than 1, first apply the + // anti-alias filter to remove high frequencies (prevent them from folding + // over the lover frequencies), then transpose. + + // Apply the anti-alias filter for samples in inputBuffer + pAAFilter->evaluate(midBuffer, inputBuffer); + + // Transpose the AA-filtered samples in "midBuffer" + pTransposer->transpose(outputBuffer, midBuffer); + } +} + + +// Sets the number of channels, 1 = mono, 2 = stereo +void RateTransposer::setChannels(int nChannels) +{ + if (!verifyNumberOfChannels(nChannels) || + (pTransposer->numChannels == nChannels)) return; + + pTransposer->setChannels(nChannels); + inputBuffer.setChannels(nChannels); + midBuffer.setChannels(nChannels); + outputBuffer.setChannels(nChannels); +} + + +// Clears all the samples in the object +void RateTransposer::clear() +{ + outputBuffer.clear(); + midBuffer.clear(); + inputBuffer.clear(); + pTransposer->resetRegisters(); + + // prefill buffer to avoid losing first samples at beginning of stream + int prefill = getLatency(); + inputBuffer.addSilent(prefill); +} + + +// Returns nonzero if there aren't any samples available for outputting. +int RateTransposer::isEmpty() const +{ + int res; + + res = FIFOProcessor::isEmpty(); + if (res == 0) return 0; + return inputBuffer.isEmpty(); +} + + +/// Return approximate initial input-output latency +int RateTransposer::getLatency() const +{ + return pTransposer->getLatency() + + ((bUseAAFilter) ? (pAAFilter->getLength() / 2) : 0); +} + + +////////////////////////////////////////////////////////////////////////////// +// +// TransposerBase - Base class for interpolation +// + +// static function to set interpolation algorithm +void TransposerBase::setAlgorithm(TransposerBase::ALGORITHM a) +{ + TransposerBase::algorithm = a; +} + + +// Transposes the sample rate of the given samples using linear interpolation. +// Returns the number of samples returned in the "dest" buffer +int TransposerBase::transpose(FIFOSampleBuffer &dest, FIFOSampleBuffer &src) +{ + int numSrcSamples = src.numSamples(); + int sizeDemand = (int)((double)numSrcSamples / rate) + 8; + int numOutput; + SAMPLETYPE *psrc = src.ptrBegin(); + SAMPLETYPE *pdest = dest.ptrEnd(sizeDemand); + +#ifndef USE_MULTICH_ALWAYS + if (numChannels == 1) + { + numOutput = transposeMono(pdest, psrc, numSrcSamples); + } + else if (numChannels == 2) + { + numOutput = transposeStereo(pdest, psrc, numSrcSamples); + } + else +#endif // USE_MULTICH_ALWAYS + { + assert(numChannels > 0); + numOutput = transposeMulti(pdest, psrc, numSrcSamples); + } + dest.putSamples(numOutput); + src.receiveSamples(numSrcSamples); + return numOutput; +} + + +TransposerBase::TransposerBase() +{ + numChannels = 0; + rate = 1.0f; +} + + +TransposerBase::~TransposerBase() +{ +} + + +void TransposerBase::setChannels(int channels) +{ + numChannels = channels; + resetRegisters(); +} + + +void TransposerBase::setRate(double newRate) +{ + rate = newRate; +} + + +// static factory function +TransposerBase *TransposerBase::newInstance() +{ +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + // Notice: For integer arithmetic support only linear algorithm (due to simplest calculus) + return ::new InterpolateLinearInteger; +#else + switch (algorithm) + { + case LINEAR: + return new InterpolateLinearFloat; + + case CUBIC: + return new InterpolateCubic; + + case SHANNON: + return new InterpolateShannon; + + default: + assert(false); + return NULL; + } +#endif +} diff --git a/media/libsoundtouch/src/RateTransposer.h b/media/libsoundtouch/src/RateTransposer.h new file mode 100644 index 0000000000..59381fab5f --- /dev/null +++ b/media/libsoundtouch/src/RateTransposer.h @@ -0,0 +1,164 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Sample rate transposer. Changes sample rate by using linear interpolation +/// together with anti-alias filtering (first order interpolation with anti- +/// alias filtering should be quite adequate for this application). +/// +/// Use either of the derived classes of 'RateTransposerInteger' or +/// 'RateTransposerFloat' for corresponding integer/floating point tranposing +/// algorithm implementation. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef RateTransposer_H +#define RateTransposer_H + +#include <stddef.h> +#include "AAFilter.h" +#include "FIFOSamplePipe.h" +#include "FIFOSampleBuffer.h" + +#include "STTypes.h" + +namespace soundtouch +{ + +/// Abstract base class for transposer implementations (linear, advanced vs integer, float etc) +class TransposerBase +{ +public: + enum ALGORITHM { + LINEAR = 0, + CUBIC, + SHANNON + }; + +protected: + virtual int transposeMono(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples) = 0; + virtual int transposeStereo(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples) = 0; + virtual int transposeMulti(SAMPLETYPE *dest, + const SAMPLETYPE *src, + int &srcSamples) = 0; + + static ALGORITHM algorithm; + +public: + double rate; + int numChannels; + + TransposerBase(); + virtual ~TransposerBase(); + + virtual int transpose(FIFOSampleBuffer &dest, FIFOSampleBuffer &src); + virtual void setRate(double newRate); + virtual void setChannels(int channels); + virtual int getLatency() const = 0; + + virtual void resetRegisters() = 0; + + // static factory function + static TransposerBase *newInstance(); + + // static function to set interpolation algorithm + static void setAlgorithm(ALGORITHM a); +}; + + +/// A common linear samplerate transposer class. +/// +class RateTransposer : public FIFOProcessor +{ +protected: + /// Anti-alias filter object + AAFilter *pAAFilter; + TransposerBase *pTransposer; + + /// Buffer for collecting samples to feed the anti-alias filter between + /// two batches + FIFOSampleBuffer inputBuffer; + + /// Buffer for keeping samples between transposing & anti-alias filter + FIFOSampleBuffer midBuffer; + + /// Output sample buffer + FIFOSampleBuffer outputBuffer; + + bool bUseAAFilter; + + + /// Transposes sample rate by applying anti-alias filter to prevent folding. + /// Returns amount of samples returned in the "dest" buffer. + /// The maximum amount of samples that can be returned at a time is set by + /// the 'set_returnBuffer_size' function. + void processSamples(const SAMPLETYPE *src, + uint numSamples); + +public: + RateTransposer(); + virtual ~RateTransposer(); + + /// Returns the output buffer object + FIFOSamplePipe *getOutput() { return &outputBuffer; }; + + /// Return anti-alias filter object + AAFilter *getAAFilter(); + + /// Enables/disables the anti-alias filter. Zero to disable, nonzero to enable + void enableAAFilter(bool newMode); + + /// Returns nonzero if anti-alias filter is enabled. + bool isAAFilterEnabled() const; + + /// Sets new target rate. Normal rate = 1.0, smaller values represent slower + /// rate, larger faster rates. + virtual void setRate(double newRate); + + /// Sets the number of channels, 1 = mono, 2 = stereo + void setChannels(int channels); + + /// Adds 'numSamples' pcs of samples from the 'samples' memory position into + /// the input of the object. + void putSamples(const SAMPLETYPE *samples, uint numSamples); + + /// Clears all the samples in the object + void clear(); + + /// Returns nonzero if there aren't any samples available for outputting. + int isEmpty() const; + + /// Return approximate initial input-output latency + int getLatency() const; +}; + +} + +#endif diff --git a/media/libsoundtouch/src/STTypes.h b/media/libsoundtouch/src/STTypes.h new file mode 100644 index 0000000000..d80bc2899e --- /dev/null +++ b/media/libsoundtouch/src/STTypes.h @@ -0,0 +1,195 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Common type definitions for SoundTouch audio processing library. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef STTypes_H +#define STTypes_H + +typedef unsigned int uint; +typedef unsigned long ulong; + +// Patch for MinGW: on Win64 long is 32-bit +#ifdef _WIN64 + typedef unsigned long long ulongptr; +#else + typedef ulong ulongptr; +#endif + + +// Helper macro for aligning pointer up to next 16-byte boundary +#define SOUNDTOUCH_ALIGN_POINTER_16(x) ( ( (ulongptr)(x) + 15 ) & ~(ulongptr)15 ) + + +#include "soundtouch_config.h" + +#if defined(WIN32) +#if defined(BUILDING_SOUNDTOUCH) +#define SOUNDTOUCH_API __declspec(dllexport) +#else +#define SOUNDTOUCH_API __declspec(dllimport) +#endif +#else +#define SOUNDTOUCH_API +#endif + +namespace soundtouch +{ + /// Max allowed number of channels + #define SOUNDTOUCH_MAX_CHANNELS 16 + + /// Activate these undef's to overrule the possible sampletype + /// setting inherited from some other header file: + //#undef SOUNDTOUCH_INTEGER_SAMPLES + //#undef SOUNDTOUCH_FLOAT_SAMPLES + + /// If following flag is defined, always uses multichannel processing + /// routines also for mono and stero sound. This is for routine testing + /// purposes; output should be same with either routines, yet disabling + /// the dedicated mono/stereo processing routines will result in slower + /// runtime performance so recommendation is to keep this off. + // #define USE_MULTICH_ALWAYS + + #if (defined(__SOFTFP__) && defined(ANDROID)) + // For Android compilation: Force use of Integer samples in case that + // compilation uses soft-floating point emulation - soft-fp is way too slow + #undef SOUNDTOUCH_FLOAT_SAMPLES + #define SOUNDTOUCH_INTEGER_SAMPLES 1 + #endif + + #if !(SOUNDTOUCH_INTEGER_SAMPLES || SOUNDTOUCH_FLOAT_SAMPLES) + + /// Choose either 32bit floating point or 16bit integer sampletype + /// by choosing one of the following defines, unless this selection + /// has already been done in some other file. + //// + /// Notes: + /// - In Windows environment, choose the sample format with the + /// following defines. + /// - In GNU environment, the floating point samples are used by + /// default, but integer samples can be chosen by giving the + /// following switch to the configure script: + /// ./configure --enable-integer-samples + /// However, if you still prefer to select the sample format here + /// also in GNU environment, then please #undef the INTEGER_SAMPLE + /// and FLOAT_SAMPLE defines first as in comments above. + //#define SOUNDTOUCH_INTEGER_SAMPLES 1 //< 16bit integer samples + #define SOUNDTOUCH_FLOAT_SAMPLES 1 //< 32bit float samples + + #endif + + #if (_M_IX86 || __i386__ || __x86_64__ || _M_X64) + /// Define this to allow X86-specific assembler/intrinsic optimizations. + /// Notice that library contains also usual C++ versions of each of these + /// these routines, so if you're having difficulties getting the optimized + /// routines compiled for whatever reason, you may disable these optimizations + /// to make the library compile. + + #define SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS 1 + + /// In GNU environment, allow the user to override this setting by + /// giving the following switch to the configure script: + /// ./configure --disable-x86-optimizations + /// ./configure --enable-x86-optimizations=no + #ifdef SOUNDTOUCH_DISABLE_X86_OPTIMIZATIONS + #undef SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS + #endif + #else + /// Always disable optimizations when not using a x86 systems. + #undef SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS + + #endif + + // If defined, allows the SIMD-optimized routines to skip unevenly aligned + // memory offsets that can cause performance penalty in some SIMD implementations. + // Causes slight compromise in sound quality. + // #define SOUNDTOUCH_ALLOW_NONEXACT_SIMD_OPTIMIZATION 1 + + + #ifdef SOUNDTOUCH_INTEGER_SAMPLES + // 16bit integer sample type + typedef short SAMPLETYPE; + // data type for sample accumulation: Use 32bit integer to prevent overflows + typedef long LONG_SAMPLETYPE; + + #ifdef SOUNDTOUCH_FLOAT_SAMPLES + // check that only one sample type is defined + #error "conflicting sample types defined" + #endif // SOUNDTOUCH_FLOAT_SAMPLES + + #ifdef SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS + // Allow MMX optimizations (not available in X64 mode) + #if (!_M_X64) + #define SOUNDTOUCH_ALLOW_MMX 1 + #endif + #endif + + #else + + // floating point samples + typedef float SAMPLETYPE; + // data type for sample accumulation: Use float also here to enable + // efficient autovectorization + typedef float LONG_SAMPLETYPE; + + #ifdef SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS + // Allow SSE optimizations + #define SOUNDTOUCH_ALLOW_SSE 1 + #endif + + #endif // SOUNDTOUCH_INTEGER_SAMPLES + + #if ((SOUNDTOUCH_ALLOW_SSE) || (__SSE__) || (SOUNDTOUCH_USE_NEON)) + #if SOUNDTOUCH_ALLOW_NONEXACT_SIMD_OPTIMIZATION + #define ST_SIMD_AVOID_UNALIGNED + #endif + #endif + +}; + +// define ST_NO_EXCEPTION_HANDLING switch to disable throwing std exceptions: +// #define ST_NO_EXCEPTION_HANDLING 1 +#ifdef ST_NO_EXCEPTION_HANDLING + // Exceptions disabled. Throw asserts instead if enabled. + #include <assert.h> + #define ST_THROW_RT_ERROR(x) {assert((const char *)x);} +#else + // use c++ standard exceptions + #include <stdexcept> + #include <string> + #define ST_THROW_RT_ERROR(x) {throw std::runtime_error(x);} +#endif + +// When this #define is active, eliminates a clicking sound when the "rate" or "pitch" +// parameter setting crosses from value <1 to >=1 or vice versa during processing. +// Default is off as such crossover is untypical case and involves a slight sound +// quality compromise. +//#define SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER 1 + +#endif diff --git a/media/libsoundtouch/src/SoundTouch.cpp b/media/libsoundtouch/src/SoundTouch.cpp new file mode 100644 index 0000000000..69fba8b9b5 --- /dev/null +++ b/media/libsoundtouch/src/SoundTouch.cpp @@ -0,0 +1,538 @@ +////////////////////////////////////////////////////////////////////////////// +/// +/// SoundTouch - main class for tempo/pitch/rate adjusting routines. +/// +/// Notes: +/// - Initialize the SoundTouch object instance by setting up the sound stream +/// parameters with functions 'setSampleRate' and 'setChannels', then set +/// desired tempo/pitch/rate settings with the corresponding functions. +/// +/// - The SoundTouch class behaves like a first-in-first-out pipeline: The +/// samples that are to be processed are fed into one of the pipe by calling +/// function 'putSamples', while the ready processed samples can be read +/// from the other end of the pipeline with function 'receiveSamples'. +/// +/// - The SoundTouch processing classes require certain sized 'batches' of +/// samples in order to process the sound. For this reason the classes buffer +/// incoming samples until there are enough of samples available for +/// processing, then they carry out the processing step and consequently +/// make the processed samples available for outputting. +/// +/// - For the above reason, the processing routines introduce a certain +/// 'latency' between the input and output, so that the samples input to +/// SoundTouch may not be immediately available in the output, and neither +/// the amount of outputtable samples may not immediately be in direct +/// relationship with the amount of previously input samples. +/// +/// - The tempo/pitch/rate control parameters can be altered during processing. +/// Please notice though that they aren't currently protected by semaphores, +/// so in multi-thread application external semaphore protection may be +/// required. +/// +/// - This class utilizes classes 'TDStretch' for tempo change (without modifying +/// pitch) and 'RateTransposer' for changing the playback rate (that is, both +/// tempo and pitch in the same ratio) of the sound. The third available control +/// 'pitch' (change pitch but maintain tempo) is produced by a combination of +/// combining the two other controls. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <assert.h> +#include <stdlib.h> +#include <memory.h> +#include <math.h> +#include <stdio.h> + +#include "SoundTouch.h" +#include "TDStretch.h" +#include "RateTransposer.h" +#include "cpu_detect.h" + +using namespace soundtouch; + +/// test if two floating point numbers are equal +#define TEST_FLOAT_EQUAL(a, b) (fabs(a - b) < 1e-10) + + +/// Print library version string for autoconf +extern "C" void soundtouch_ac_test() +{ + printf("SoundTouch Version: %s\n",SOUNDTOUCH_VERSION); +} + + +SoundTouch::SoundTouch() +{ + // Initialize rate transposer and tempo changer instances + + pRateTransposer = new RateTransposer(); + pTDStretch = TDStretch::newInstance(); + + setOutPipe(pTDStretch); + + rate = tempo = 0; + + virtualPitch = + virtualRate = + virtualTempo = 1.0; + + calcEffectiveRateAndTempo(); + + samplesExpectedOut = 0; + samplesOutput = 0; + + channels = 0; + bSrateSet = false; +} + + +SoundTouch::~SoundTouch() +{ + delete pRateTransposer; + delete pTDStretch; +} + + +/// Get SoundTouch library version string +const char *SoundTouch::getVersionString() +{ + static const char *_version = SOUNDTOUCH_VERSION; + + return _version; +} + + +/// Get SoundTouch library version Id +uint SoundTouch::getVersionId() +{ + return SOUNDTOUCH_VERSION_ID; +} + + +// Sets the number of channels, 1 = mono, 2 = stereo +void SoundTouch::setChannels(uint numChannels) +{ + if (!verifyNumberOfChannels(numChannels)) return; + + channels = numChannels; + pRateTransposer->setChannels((int)numChannels); + pTDStretch->setChannels((int)numChannels); +} + + +// Sets new rate control value. Normal rate = 1.0, smaller values +// represent slower rate, larger faster rates. +void SoundTouch::setRate(double newRate) +{ + virtualRate = newRate; + calcEffectiveRateAndTempo(); +} + + +// Sets new rate control value as a difference in percents compared +// to the original rate (-50 .. +100 %) +void SoundTouch::setRateChange(double newRate) +{ + virtualRate = 1.0 + 0.01 * newRate; + calcEffectiveRateAndTempo(); +} + + +// Sets new tempo control value. Normal tempo = 1.0, smaller values +// represent slower tempo, larger faster tempo. +void SoundTouch::setTempo(double newTempo) +{ + virtualTempo = newTempo; + calcEffectiveRateAndTempo(); +} + + +// Sets new tempo control value as a difference in percents compared +// to the original tempo (-50 .. +100 %) +void SoundTouch::setTempoChange(double newTempo) +{ + virtualTempo = 1.0 + 0.01 * newTempo; + calcEffectiveRateAndTempo(); +} + + +// Sets new pitch control value. Original pitch = 1.0, smaller values +// represent lower pitches, larger values higher pitch. +void SoundTouch::setPitch(double newPitch) +{ + virtualPitch = newPitch; + calcEffectiveRateAndTempo(); +} + + +// Sets pitch change in octaves compared to the original pitch +// (-1.00 .. +1.00) +void SoundTouch::setPitchOctaves(double newPitch) +{ + virtualPitch = exp(0.69314718056 * newPitch); + calcEffectiveRateAndTempo(); +} + + +// Sets pitch change in semi-tones compared to the original pitch +// (-12 .. +12) +void SoundTouch::setPitchSemiTones(int newPitch) +{ + setPitchOctaves((double)newPitch / 12.0); +} + + +void SoundTouch::setPitchSemiTones(double newPitch) +{ + setPitchOctaves(newPitch / 12.0); +} + + +// Calculates 'effective' rate and tempo values from the +// nominal control values. +void SoundTouch::calcEffectiveRateAndTempo() +{ + double oldTempo = tempo; + double oldRate = rate; + + tempo = virtualTempo / virtualPitch; + rate = virtualPitch * virtualRate; + + if (!TEST_FLOAT_EQUAL(rate,oldRate)) pRateTransposer->setRate(rate); + if (!TEST_FLOAT_EQUAL(tempo, oldTempo)) pTDStretch->setTempo(tempo); + +#ifndef SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER + if (rate <= 1.0f) + { + if (output != pTDStretch) + { + FIFOSamplePipe *tempoOut; + + assert(output == pRateTransposer); + // move samples in the current output buffer to the output of pTDStretch + tempoOut = pTDStretch->getOutput(); + tempoOut->moveSamples(*output); + // move samples in pitch transposer's store buffer to tempo changer's input + // deprecated : pTDStretch->moveSamples(*pRateTransposer->getStore()); + + output = pTDStretch; + } + } + else +#endif + { + if (output != pRateTransposer) + { + FIFOSamplePipe *transOut; + + assert(output == pTDStretch); + // move samples in the current output buffer to the output of pRateTransposer + transOut = pRateTransposer->getOutput(); + transOut->moveSamples(*output); + // move samples in tempo changer's input to pitch transposer's input + pRateTransposer->moveSamples(*pTDStretch->getInput()); + + output = pRateTransposer; + } + } +} + + +// Sets sample rate. +void SoundTouch::setSampleRate(uint srate) +{ + // set sample rate, leave other tempo changer parameters as they are. + pTDStretch->setParameters((int)srate); + bSrateSet = true; +} + + +// Adds 'numSamples' pcs of samples from the 'samples' memory position into +// the input of the object. +void SoundTouch::putSamples(const SAMPLETYPE *samples, uint nSamples) +{ + if (bSrateSet == false) + { + ST_THROW_RT_ERROR("SoundTouch : Sample rate not defined"); + } + else if (channels == 0) + { + ST_THROW_RT_ERROR("SoundTouch : Number of channels not defined"); + } + + // accumulate how many samples are expected out from processing, given the current + // processing setting + samplesExpectedOut += (double)nSamples / ((double)rate * (double)tempo); + +#ifndef SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER + if (rate <= 1.0f) + { + // transpose the rate down, output the transposed sound to tempo changer buffer + assert(output == pTDStretch); + pRateTransposer->putSamples(samples, nSamples); + pTDStretch->moveSamples(*pRateTransposer); + } + else +#endif + { + // evaluate the tempo changer, then transpose the rate up, + assert(output == pRateTransposer); + pTDStretch->putSamples(samples, nSamples); + pRateTransposer->moveSamples(*pTDStretch); + } +} + + +// Flushes the last samples from the processing pipeline to the output. +// Clears also the internal processing buffers. +// +// Note: This function is meant for extracting the last samples of a sound +// stream. This function may introduce additional blank samples in the end +// of the sound stream, and thus it's not recommended to call this function +// in the middle of a sound stream. +void SoundTouch::flush() +{ + int i; + int numStillExpected; + SAMPLETYPE *buff = new SAMPLETYPE[128 * channels]; + + // how many samples are still expected to output + numStillExpected = (int)((long)(samplesExpectedOut + 0.5) - samplesOutput); + if (numStillExpected < 0) numStillExpected = 0; + + memset(buff, 0, 128 * channels * sizeof(SAMPLETYPE)); + // "Push" the last active samples out from the processing pipeline by + // feeding blank samples into the processing pipeline until new, + // processed samples appear in the output (not however, more than + // 24ksamples in any case) + for (i = 0; (numStillExpected > (int)numSamples()) && (i < 200); i ++) + { + putSamples(buff, 128); + } + + adjustAmountOfSamples(numStillExpected); + + delete[] buff; + + // Clear input buffers + pTDStretch->clearInput(); + // yet leave the output intouched as that's where the + // flushed samples are! +} + + +// Changes a setting controlling the processing system behaviour. See the +// 'SETTING_...' defines for available setting ID's. +bool SoundTouch::setSetting(int settingId, int value) +{ + int sampleRate, sequenceMs, seekWindowMs, overlapMs; + + // read current tdstretch routine parameters + pTDStretch->getParameters(&sampleRate, &sequenceMs, &seekWindowMs, &overlapMs); + + switch (settingId) + { + case SETTING_USE_AA_FILTER : + // enables / disabless anti-alias filter + pRateTransposer->enableAAFilter((value != 0) ? true : false); + return true; + + case SETTING_AA_FILTER_LENGTH : + // sets anti-alias filter length + pRateTransposer->getAAFilter()->setLength(value); + return true; + + case SETTING_USE_QUICKSEEK : + // enables / disables tempo routine quick seeking algorithm + pTDStretch->enableQuickSeek((value != 0) ? true : false); + return true; + + case SETTING_SEQUENCE_MS: + // change time-stretch sequence duration parameter + pTDStretch->setParameters(sampleRate, value, seekWindowMs, overlapMs); + return true; + + case SETTING_SEEKWINDOW_MS: + // change time-stretch seek window length parameter + pTDStretch->setParameters(sampleRate, sequenceMs, value, overlapMs); + return true; + + case SETTING_OVERLAP_MS: + // change time-stretch overlap length parameter + pTDStretch->setParameters(sampleRate, sequenceMs, seekWindowMs, value); + return true; + + default : + return false; + } +} + + +// Reads a setting controlling the processing system behaviour. See the +// 'SETTING_...' defines for available setting ID's. +// +// Returns the setting value. +int SoundTouch::getSetting(int settingId) const +{ + int temp; + + switch (settingId) + { + case SETTING_USE_AA_FILTER : + return (uint)pRateTransposer->isAAFilterEnabled(); + + case SETTING_AA_FILTER_LENGTH : + return pRateTransposer->getAAFilter()->getLength(); + + case SETTING_USE_QUICKSEEK : + return (uint)pTDStretch->isQuickSeekEnabled(); + + case SETTING_SEQUENCE_MS: + pTDStretch->getParameters(NULL, &temp, NULL, NULL); + return temp; + + case SETTING_SEEKWINDOW_MS: + pTDStretch->getParameters(NULL, NULL, &temp, NULL); + return temp; + + case SETTING_OVERLAP_MS: + pTDStretch->getParameters(NULL, NULL, NULL, &temp); + return temp; + + case SETTING_NOMINAL_INPUT_SEQUENCE : + { + int size = pTDStretch->getInputSampleReq(); + +#ifndef SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER + if (rate <= 1.0) + { + // transposing done before timestretch, which impacts latency + return (int)(size * rate + 0.5); + } +#endif + return size; + } + + case SETTING_NOMINAL_OUTPUT_SEQUENCE : + { + int size = pTDStretch->getOutputBatchSize(); + + if (rate > 1.0) + { + // transposing done after timestretch, which impacts latency + return (int)(size / rate + 0.5); + } + return size; + } + + case SETTING_INITIAL_LATENCY: + { + double latency = pTDStretch->getLatency(); + int latency_tr = pRateTransposer->getLatency(); + +#ifndef SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER + if (rate <= 1.0) + { + // transposing done before timestretch, which impacts latency + latency = (latency + latency_tr) * rate; + } + else +#endif + { + latency += (double)latency_tr / rate; + } + + return (int)(latency + 0.5); + } + + default : + return 0; + } +} + + +// Clears all the samples in the object's output and internal processing +// buffers. +void SoundTouch::clear() +{ + samplesExpectedOut = 0; + samplesOutput = 0; + pRateTransposer->clear(); + pTDStretch->clear(); +} + + +/// Returns number of samples currently unprocessed. +uint SoundTouch::numUnprocessedSamples() const +{ + FIFOSamplePipe * psp; + if (pTDStretch) + { + psp = pTDStretch->getInput(); + if (psp) + { + return psp->numSamples(); + } + } + return 0; +} + + +/// Output samples from beginning of the sample buffer. Copies requested samples to +/// output buffer and removes them from the sample buffer. If there are less than +/// 'numsample' samples in the buffer, returns all that available. +/// +/// \return Number of samples returned. +uint SoundTouch::receiveSamples(SAMPLETYPE *output, uint maxSamples) +{ + uint ret = FIFOProcessor::receiveSamples(output, maxSamples); + samplesOutput += (long)ret; + return ret; +} + + +/// Adjusts book-keeping so that given number of samples are removed from beginning of the +/// sample buffer without copying them anywhere. +/// +/// Used to reduce the number of samples in the buffer when accessing the sample buffer directly +/// with 'ptrBegin' function. +uint SoundTouch::receiveSamples(uint maxSamples) +{ + uint ret = FIFOProcessor::receiveSamples(maxSamples); + samplesOutput += (long)ret; + return ret; +} + + +/// Get ratio between input and output audio durations, useful for calculating +/// processed output duration: if you'll process a stream of N samples, then +/// you can expect to get out N * getInputOutputSampleRatio() samples. +double SoundTouch::getInputOutputSampleRatio() +{ + return 1.0 / (tempo * rate); +} diff --git a/media/libsoundtouch/src/SoundTouch.h b/media/libsoundtouch/src/SoundTouch.h new file mode 100644 index 0000000000..19c161fed5 --- /dev/null +++ b/media/libsoundtouch/src/SoundTouch.h @@ -0,0 +1,348 @@ +////////////////////////////////////////////////////////////////////////////// +/// +/// SoundTouch - main class for tempo/pitch/rate adjusting routines. +/// +/// Notes: +/// - Initialize the SoundTouch object instance by setting up the sound stream +/// parameters with functions 'setSampleRate' and 'setChannels', then set +/// desired tempo/pitch/rate settings with the corresponding functions. +/// +/// - The SoundTouch class behaves like a first-in-first-out pipeline: The +/// samples that are to be processed are fed into one of the pipe by calling +/// function 'putSamples', while the ready processed samples can be read +/// from the other end of the pipeline with function 'receiveSamples'. +/// +/// - The SoundTouch processing classes require certain sized 'batches' of +/// samples in order to process the sound. For this reason the classes buffer +/// incoming samples until there are enough of samples available for +/// processing, then they carry out the processing step and consequently +/// make the processed samples available for outputting. +/// +/// - For the above reason, the processing routines introduce a certain +/// 'latency' between the input and output, so that the samples input to +/// SoundTouch may not be immediately available in the output, and neither +/// the amount of outputtable samples may not immediately be in direct +/// relationship with the amount of previously input samples. +/// +/// - The tempo/pitch/rate control parameters can be altered during processing. +/// Please notice though that they aren't currently protected by semaphores, +/// so in multi-thread application external semaphore protection may be +/// required. +/// +/// - This class utilizes classes 'TDStretch' for tempo change (without modifying +/// pitch) and 'RateTransposer' for changing the playback rate (that is, both +/// tempo and pitch in the same ratio) of the sound. The third available control +/// 'pitch' (change pitch but maintain tempo) is produced by a combination of +/// combining the two other controls. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef SoundTouch_H +#define SoundTouch_H + +#include "FIFOSamplePipe.h" +#include "STTypes.h" + +namespace soundtouch +{ + +/// Soundtouch library version string +#define SOUNDTOUCH_VERSION "2.2" + +/// SoundTouch library version id +#define SOUNDTOUCH_VERSION_ID (20200) + +// +// Available setting IDs for the 'setSetting' & 'get_setting' functions: + +/// Enable/disable anti-alias filter in pitch transposer (0 = disable) +#define SETTING_USE_AA_FILTER 0 + +/// Pitch transposer anti-alias filter length (8 .. 128 taps, default = 32) +#define SETTING_AA_FILTER_LENGTH 1 + +/// Enable/disable quick seeking algorithm in tempo changer routine +/// (enabling quick seeking lowers CPU utilization but causes a minor sound +/// quality compromising) +#define SETTING_USE_QUICKSEEK 2 + +/// Time-stretch algorithm single processing sequence length in milliseconds. This determines +/// to how long sequences the original sound is chopped in the time-stretch algorithm. +/// See "STTypes.h" or README for more information. +#define SETTING_SEQUENCE_MS 3 + +/// Time-stretch algorithm seeking window length in milliseconds for algorithm that finds the +/// best possible overlapping location. This determines from how wide window the algorithm +/// may look for an optimal joining location when mixing the sound sequences back together. +/// See "STTypes.h" or README for more information. +#define SETTING_SEEKWINDOW_MS 4 + +/// Time-stretch algorithm overlap length in milliseconds. When the chopped sound sequences +/// are mixed back together, to form a continuous sound stream, this parameter defines over +/// how long period the two consecutive sequences are let to overlap each other. +/// See "STTypes.h" or README for more information. +#define SETTING_OVERLAP_MS 5 + + +/// Call "getSetting" with this ID to query processing sequence size in samples. +/// This value gives approximate value of how many input samples you'll need to +/// feed into SoundTouch after initial buffering to get out a new batch of +/// output samples. +/// +/// This value does not include initial buffering at beginning of a new processing +/// stream, use SETTING_INITIAL_LATENCY to get the initial buffering size. +/// +/// Notices: +/// - This is read-only parameter, i.e. setSetting ignores this parameter +/// - This parameter value is not constant but change depending on +/// tempo/pitch/rate/samplerate settings. +#define SETTING_NOMINAL_INPUT_SEQUENCE 6 + + +/// Call "getSetting" with this ID to query nominal average processing output +/// size in samples. This value tells approcimate value how many output samples +/// SoundTouch outputs once it does DSP processing run for a batch of input samples. +/// +/// Notices: +/// - This is read-only parameter, i.e. setSetting ignores this parameter +/// - This parameter value is not constant but change depending on +/// tempo/pitch/rate/samplerate settings. +#define SETTING_NOMINAL_OUTPUT_SEQUENCE 7 + + +/// Call "getSetting" with this ID to query initial processing latency, i.e. +/// approx. how many samples you'll need to enter to SoundTouch pipeline before +/// you can expect to get first batch of ready output samples out. +/// +/// After the first output batch, you can then expect to get approx. +/// SETTING_NOMINAL_OUTPUT_SEQUENCE ready samples out for every +/// SETTING_NOMINAL_INPUT_SEQUENCE samples that you enter into SoundTouch. +/// +/// Example: +/// processing with parameter -tempo=5 +/// => initial latency = 5509 samples +/// input sequence = 4167 samples +/// output sequence = 3969 samples +/// +/// Accordingly, you can expect to feed in approx. 5509 samples at beginning of +/// the stream, and then you'll get out the first 3969 samples. After that, for +/// every approx. 4167 samples that you'll put in, you'll receive again approx. +/// 3969 samples out. +/// +/// This also means that average latency during stream processing is +/// INITIAL_LATENCY-OUTPUT_SEQUENCE/2, in the above example case 5509-3969/2 +/// = 3524 samples +/// +/// Notices: +/// - This is read-only parameter, i.e. setSetting ignores this parameter +/// - This parameter value is not constant but change depending on +/// tempo/pitch/rate/samplerate settings. +#define SETTING_INITIAL_LATENCY 8 + + +class SOUNDTOUCH_API SoundTouch : public FIFOProcessor +{ +private: + /// Rate transposer class instance + class RateTransposer *pRateTransposer; + + /// Time-stretch class instance + class TDStretch *pTDStretch; + + /// Virtual pitch parameter. Effective rate & tempo are calculated from these parameters. + double virtualRate; + + /// Virtual pitch parameter. Effective rate & tempo are calculated from these parameters. + double virtualTempo; + + /// Virtual pitch parameter. Effective rate & tempo are calculated from these parameters. + double virtualPitch; + + /// Flag: Has sample rate been set? + bool bSrateSet; + + /// Accumulator for how many samples in total will be expected as output vs. samples put in, + /// considering current processing settings. + double samplesExpectedOut; + + /// Accumulator for how many samples in total have been read out from the processing so far + long samplesOutput; + + /// Calculates effective rate & tempo valuescfrom 'virtualRate', 'virtualTempo' and + /// 'virtualPitch' parameters. + void calcEffectiveRateAndTempo(); + +protected : + /// Number of channels + uint channels; + + /// Effective 'rate' value calculated from 'virtualRate', 'virtualTempo' and 'virtualPitch' + double rate; + + /// Effective 'tempo' value calculated from 'virtualRate', 'virtualTempo' and 'virtualPitch' + double tempo; + +public: + SoundTouch(); + virtual ~SoundTouch(); + + /// Get SoundTouch library version string + static const char *getVersionString(); + + /// Get SoundTouch library version Id + static uint getVersionId(); + + /// Sets new rate control value. Normal rate = 1.0, smaller values + /// represent slower rate, larger faster rates. + void setRate(double newRate); + + /// Sets new tempo control value. Normal tempo = 1.0, smaller values + /// represent slower tempo, larger faster tempo. + void setTempo(double newTempo); + + /// Sets new rate control value as a difference in percents compared + /// to the original rate (-50 .. +100 %) + void setRateChange(double newRate); + + /// Sets new tempo control value as a difference in percents compared + /// to the original tempo (-50 .. +100 %) + void setTempoChange(double newTempo); + + /// Sets new pitch control value. Original pitch = 1.0, smaller values + /// represent lower pitches, larger values higher pitch. + void setPitch(double newPitch); + + /// Sets pitch change in octaves compared to the original pitch + /// (-1.00 .. +1.00) + void setPitchOctaves(double newPitch); + + /// Sets pitch change in semi-tones compared to the original pitch + /// (-12 .. +12) + void setPitchSemiTones(int newPitch); + void setPitchSemiTones(double newPitch); + + /// Sets the number of channels, 1 = mono, 2 = stereo + void setChannels(uint numChannels); + + /// Sets sample rate. + void setSampleRate(uint srate); + + /// Get ratio between input and output audio durations, useful for calculating + /// processed output duration: if you'll process a stream of N samples, then + /// you can expect to get out N * getInputOutputSampleRatio() samples. + /// + /// This ratio will give accurate target duration ratio for a full audio track, + /// given that the the whole track is processed with same processing parameters. + /// + /// If this ratio is applied to calculate intermediate offsets inside a processing + /// stream, then this ratio is approximate and can deviate +- some tens of milliseconds + /// from ideal offset, yet by end of the audio stream the duration ratio will become + /// exact. + /// + /// Example: if processing with parameters "-tempo=15 -pitch=-3", the function + /// will return value 0.8695652... Now, if processing an audio stream whose duration + /// is exactly one million audio samples, then you can expect the processed + /// output duration be 0.869565 * 1000000 = 869565 samples. + double getInputOutputSampleRatio(); + + /// Flushes the last samples from the processing pipeline to the output. + /// Clears also the internal processing buffers. + // + /// Note: This function is meant for extracting the last samples of a sound + /// stream. This function may introduce additional blank samples in the end + /// of the sound stream, and thus it's not recommended to call this function + /// in the middle of a sound stream. + void flush(); + + /// Adds 'numSamples' pcs of samples from the 'samples' memory position into + /// the input of the object. Notice that sample rate _has_to_ be set before + /// calling this function, otherwise throws a runtime_error exception. + virtual void putSamples( + const SAMPLETYPE *samples, ///< Pointer to sample buffer. + uint numSamples ///< Number of samples in buffer. Notice + ///< that in case of stereo-sound a single sample + ///< contains data for both channels. + ); + + /// Output samples from beginning of the sample buffer. Copies requested samples to + /// output buffer and removes them from the sample buffer. If there are less than + /// 'numsample' samples in the buffer, returns all that available. + /// + /// \return Number of samples returned. + virtual uint receiveSamples(SAMPLETYPE *output, ///< Buffer where to copy output samples. + uint maxSamples ///< How many samples to receive at max. + ); + + /// Adjusts book-keeping so that given number of samples are removed from beginning of the + /// sample buffer without copying them anywhere. + /// + /// Used to reduce the number of samples in the buffer when accessing the sample buffer directly + /// with 'ptrBegin' function. + virtual uint receiveSamples(uint maxSamples ///< Remove this many samples from the beginning of pipe. + ); + + /// Clears all the samples in the object's output and internal processing + /// buffers. + virtual void clear(); + + /// Changes a setting controlling the processing system behaviour. See the + /// 'SETTING_...' defines for available setting ID's. + /// + /// \return 'true' if the setting was successfully changed + bool setSetting(int settingId, ///< Setting ID number. see SETTING_... defines. + int value ///< New setting value. + ); + + /// Reads a setting controlling the processing system behaviour. See the + /// 'SETTING_...' defines for available setting ID's. + /// + /// \return the setting value. + int getSetting(int settingId ///< Setting ID number, see SETTING_... defines. + ) const; + + /// Returns number of samples currently unprocessed. + virtual uint numUnprocessedSamples() const; + + /// Return number of channels + uint numChannels() const + { + return channels; + } + + /// Other handy functions that are implemented in the ancestor classes (see + /// classes 'FIFOProcessor' and 'FIFOSamplePipe') + /// + /// - receiveSamples() : Use this function to receive 'ready' processed samples from SoundTouch. + /// - numSamples() : Get number of 'ready' samples that can be received with + /// function 'receiveSamples()' + /// - isEmpty() : Returns nonzero if there aren't any 'ready' samples. + /// - clear() : Clears all samples from ready/processing buffers. +}; + +} +#endif diff --git a/media/libsoundtouch/src/SoundTouchFactory.cpp b/media/libsoundtouch/src/SoundTouchFactory.cpp new file mode 100644 index 0000000000..d33fc133d7 --- /dev/null +++ b/media/libsoundtouch/src/SoundTouchFactory.cpp @@ -0,0 +1,31 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include <soundtouch/SoundTouch.h> + +namespace soundtouch +{ + +SOUNDTOUCH_API +soundtouch::SoundTouch* +createSoundTouchObj() +{ + return new soundtouch::SoundTouch(); +} + +SOUNDTOUCH_API +void +destroySoundTouchObj(soundtouch::SoundTouch* aObj) +{ + // SoundTouch runs deletes in its destructor, meaning they need to be run in + // the DLL context. Gecko should send its SoundTouch obj pointers here to be + // cleaned up. + if (aObj) { + delete aObj; + } +} + +} diff --git a/media/libsoundtouch/src/SoundTouchFactory.h b/media/libsoundtouch/src/SoundTouchFactory.h new file mode 100644 index 0000000000..98d8a7deb1 --- /dev/null +++ b/media/libsoundtouch/src/SoundTouchFactory.h @@ -0,0 +1,22 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Code for dealing with creating/deleting SoundTouch objects across DLL +// boundaries. + +#include <soundtouch/STTypes.h> +#include <soundtouch/SoundTouch.h> + +namespace soundtouch +{ +SOUNDTOUCH_API +soundtouch::SoundTouch* +createSoundTouchObj(); + +SOUNDTOUCH_API +void +destroySoundTouchObj(soundtouch::SoundTouch* aObj); +} diff --git a/media/libsoundtouch/src/TDStretch.cpp b/media/libsoundtouch/src/TDStretch.cpp new file mode 100644 index 0000000000..709e979d1d --- /dev/null +++ b/media/libsoundtouch/src/TDStretch.cpp @@ -0,0 +1,1108 @@ +/////////////////////////////////////////////////////////////////////////////// +/// +/// Sampled sound tempo changer/time stretch algorithm. Changes the sound tempo +/// while maintaining the original pitch by using a time domain WSOLA-like +/// method with several performance-increasing tweaks. +/// +/// Notes : MMX optimized functions reside in a separate, platform-specific +/// file, e.g. 'mmx_win.cpp' or 'mmx_gcc.cpp'. +/// +/// This source file contains OpenMP optimizations that allow speeding up the +/// corss-correlation algorithm by executing it in several threads / CPU cores +/// in parallel. See the following article link for more detailed discussion +/// about SoundTouch OpenMP optimizations: +/// http://www.softwarecoven.com/parallel-computing-in-embedded-mobile-devices +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include <string.h> +#include <limits.h> +#include <assert.h> +#include <math.h> +#include <float.h> + +#include "STTypes.h" +#include "cpu_detect.h" +#include "TDStretch.h" + +using namespace soundtouch; + +#define max(x, y) (((x) > (y)) ? (x) : (y)) + +/***************************************************************************** + * + * Constant definitions + * + *****************************************************************************/ + +// Table for the hierarchical mixing position seeking algorithm +const short _scanOffsets[5][24]={ + { 124, 186, 248, 310, 372, 434, 496, 558, 620, 682, 744, 806, + 868, 930, 992, 1054, 1116, 1178, 1240, 1302, 1364, 1426, 1488, 0}, + {-100, -75, -50, -25, 25, 50, 75, 100, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, + { -20, -15, -10, -5, 5, 10, 15, 20, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, + { -4, -3, -2, -1, 1, 2, 3, 4, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, + { 121, 114, 97, 114, 98, 105, 108, 32, 104, 99, 117, 111, + 116, 100, 110, 117, 111, 115, 0, 0, 0, 0, 0, 0}}; + +/***************************************************************************** + * + * Implementation of the class 'TDStretch' + * + *****************************************************************************/ + + +TDStretch::TDStretch() : FIFOProcessor(&outputBuffer) +{ + bQuickSeek = false; + channels = 2; + + pMidBuffer = NULL; + pMidBufferUnaligned = NULL; + overlapLength = 0; + + bAutoSeqSetting = true; + bAutoSeekSetting = true; + + tempo = 1.0f; + setParameters(44100, DEFAULT_SEQUENCE_MS, DEFAULT_SEEKWINDOW_MS, DEFAULT_OVERLAP_MS); + setTempo(1.0f); + + clear(); +} + + + +TDStretch::~TDStretch() +{ + delete[] pMidBufferUnaligned; +} + + + +// Sets routine control parameters. These control are certain time constants +// defining how the sound is stretched to the desired duration. +// +// 'sampleRate' = sample rate of the sound +// 'sequenceMS' = one processing sequence length in milliseconds (default = 82 ms) +// 'seekwindowMS' = seeking window length for scanning the best overlapping +// position (default = 28 ms) +// 'overlapMS' = overlapping length (default = 12 ms) + +void TDStretch::setParameters(int aSampleRate, int aSequenceMS, + int aSeekWindowMS, int aOverlapMS) +{ + // accept only positive parameter values - if zero or negative, use old values instead + if (aSampleRate > 0) + { + if (aSampleRate > 192000) ST_THROW_RT_ERROR("Error: Excessive samplerate"); + this->sampleRate = aSampleRate; + } + + if (aOverlapMS > 0) this->overlapMs = aOverlapMS; + + if (aSequenceMS > 0) + { + this->sequenceMs = aSequenceMS; + bAutoSeqSetting = false; + } + else if (aSequenceMS == 0) + { + // if zero, use automatic setting + bAutoSeqSetting = true; + } + + if (aSeekWindowMS > 0) + { + this->seekWindowMs = aSeekWindowMS; + bAutoSeekSetting = false; + } + else if (aSeekWindowMS == 0) + { + // if zero, use automatic setting + bAutoSeekSetting = true; + } + + calcSeqParameters(); + + calculateOverlapLength(overlapMs); + + // set tempo to recalculate 'sampleReq' + setTempo(tempo); +} + + + +/// Get routine control parameters, see setParameters() function. +/// Any of the parameters to this function can be NULL, in such case corresponding parameter +/// value isn't returned. +void TDStretch::getParameters(int *pSampleRate, int *pSequenceMs, int *pSeekWindowMs, int *pOverlapMs) const +{ + if (pSampleRate) + { + *pSampleRate = sampleRate; + } + + if (pSequenceMs) + { + *pSequenceMs = (bAutoSeqSetting) ? (USE_AUTO_SEQUENCE_LEN) : sequenceMs; + } + + if (pSeekWindowMs) + { + *pSeekWindowMs = (bAutoSeekSetting) ? (USE_AUTO_SEEKWINDOW_LEN) : seekWindowMs; + } + + if (pOverlapMs) + { + *pOverlapMs = overlapMs; + } +} + + +// Overlaps samples in 'midBuffer' with the samples in 'pInput' +void TDStretch::overlapMono(SAMPLETYPE *pOutput, const SAMPLETYPE *pInput) const +{ + int i; + SAMPLETYPE m1, m2; + + m1 = (SAMPLETYPE)0; + m2 = (SAMPLETYPE)overlapLength; + + for (i = 0; i < overlapLength ; i ++) + { + pOutput[i] = (pInput[i] * m1 + pMidBuffer[i] * m2 ) / overlapLength; + m1 += 1; + m2 -= 1; + } +} + + + +void TDStretch::clearMidBuffer() +{ + memset(pMidBuffer, 0, channels * sizeof(SAMPLETYPE) * overlapLength); +} + + +void TDStretch::clearInput() +{ + inputBuffer.clear(); + clearMidBuffer(); + isBeginning = true; + maxnorm = 0; + maxnormf = 1e8; + skipFract = 0; +} + + +// Clears the sample buffers +void TDStretch::clear() +{ + outputBuffer.clear(); + clearInput(); +} + + + +// Enables/disables the quick position seeking algorithm. Zero to disable, nonzero +// to enable +void TDStretch::enableQuickSeek(bool enable) +{ + bQuickSeek = enable; +} + + +// Returns nonzero if the quick seeking algorithm is enabled. +bool TDStretch::isQuickSeekEnabled() const +{ + return bQuickSeek; +} + + +// Seeks for the optimal overlap-mixing position. +int TDStretch::seekBestOverlapPosition(const SAMPLETYPE *refPos) +{ + if (bQuickSeek) + { + return seekBestOverlapPositionQuick(refPos); + } + else + { + return seekBestOverlapPositionFull(refPos); + } +} + + +// Overlaps samples in 'midBuffer' with the samples in 'pInputBuffer' at position +// of 'ovlPos'. +inline void TDStretch::overlap(SAMPLETYPE *pOutput, const SAMPLETYPE *pInput, uint ovlPos) const +{ +#ifndef USE_MULTICH_ALWAYS + if (channels == 1) + { + // mono sound. + overlapMono(pOutput, pInput + ovlPos); + } + else if (channels == 2) + { + // stereo sound + overlapStereo(pOutput, pInput + 2 * ovlPos); + } + else +#endif // USE_MULTICH_ALWAYS + { + assert(channels > 0); + overlapMulti(pOutput, pInput + channels * ovlPos); + } +} + + +// Seeks for the optimal overlap-mixing position. The 'stereo' version of the +// routine +// +// The best position is determined as the position where the two overlapped +// sample sequences are 'most alike', in terms of the highest cross-correlation +// value over the overlapping period +int TDStretch::seekBestOverlapPositionFull(const SAMPLETYPE *refPos) +{ + int bestOffs; + double bestCorr; + int i; + double norm; + + bestCorr = -FLT_MAX; + bestOffs = 0; + + // Scans for the best correlation value by testing each possible position + // over the permitted range. + bestCorr = calcCrossCorr(refPos, pMidBuffer, norm); + bestCorr = (bestCorr + 0.1) * 0.75; + + #pragma omp parallel for + for (i = 1; i < seekLength; i ++) + { + double corr; + // Calculates correlation value for the mixing position corresponding to 'i' +#if defined(_OPENMP) || defined(ST_SIMD_AVOID_UNALIGNED) + // in parallel OpenMP mode, can't use norm accumulator version as parallel executor won't + // iterate the loop in sequential order + // in SIMD mode, avoid accumulator version to allow avoiding unaligned positions + corr = calcCrossCorr(refPos + channels * i, pMidBuffer, norm); +#else + // In non-parallel version call "calcCrossCorrAccumulate" that is otherwise same + // as "calcCrossCorr", but saves time by reusing & updating previously stored + // "norm" value + corr = calcCrossCorrAccumulate(refPos + channels * i, pMidBuffer, norm); +#endif + // heuristic rule to slightly favour values close to mid of the range + double tmp = (double)(2 * i - seekLength) / (double)seekLength; + corr = ((corr + 0.1) * (1.0 - 0.25 * tmp * tmp)); + + // Checks for the highest correlation value + if (corr > bestCorr) + { + // For optimal performance, enter critical section only in case that best value found. + // in such case repeat 'if' condition as it's possible that parallel execution may have + // updated the bestCorr value in the mean time + #pragma omp critical + if (corr > bestCorr) + { + bestCorr = corr; + bestOffs = i; + } + } + } + +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + adaptNormalizer(); +#endif + + // clear cross correlation routine state if necessary (is so e.g. in MMX routines). + clearCrossCorrState(); + + return bestOffs; +} + + +// Quick seek algorithm for improved runtime-performance: First roughly scans through the +// correlation area, and then scan surroundings of two best preliminary correlation candidates +// with improved precision +// +// Based on testing: +// - This algorithm gives on average 99% as good match as the full algorithm +// - this quick seek algorithm finds the best match on ~90% of cases +// - on those 10% of cases when this algorithm doesn't find best match, +// it still finds on average ~90% match vs. the best possible match +int TDStretch::seekBestOverlapPositionQuick(const SAMPLETYPE *refPos) +{ +#define _MIN(a, b) (((a) < (b)) ? (a) : (b)) +#define SCANSTEP 16 +#define SCANWIND 8 + + int bestOffs; + int i; + int bestOffs2; + float bestCorr, corr; + float bestCorr2; + double norm; + + // note: 'float' types used in this function in case that the platform would need to use software-fp + + bestCorr = + bestCorr2 = -FLT_MAX; + bestOffs = + bestOffs2 = SCANWIND; + + // Scans for the best correlation value by testing each possible position + // over the permitted range. Look for two best matches on the first pass to + // increase possibility of ideal match. + // + // Begin from "SCANSTEP" instead of SCANWIND to make the calculation + // catch the 'middlepoint' of seekLength vector as that's the a-priori + // expected best match position + // + // Roughly: + // - 15% of cases find best result directly on the first round, + // - 75% cases find better match on 2nd round around the best match from 1st round + // - 10% cases find better match on 2nd round around the 2nd-best-match from 1st round + for (i = SCANSTEP; i < seekLength - SCANWIND - 1; i += SCANSTEP) + { + // Calculates correlation value for the mixing position corresponding + // to 'i' + corr = (float)calcCrossCorr(refPos + channels*i, pMidBuffer, norm); + // heuristic rule to slightly favour values close to mid of the seek range + float tmp = (float)(2 * i - seekLength - 1) / (float)seekLength; + corr = ((corr + 0.1f) * (1.0f - 0.25f * tmp * tmp)); + + // Checks for the highest correlation value + if (corr > bestCorr) + { + // found new best match. keep the previous best as 2nd best match + bestCorr2 = bestCorr; + bestOffs2 = bestOffs; + bestCorr = corr; + bestOffs = i; + } + else if (corr > bestCorr2) + { + // not new best, but still new 2nd best match + bestCorr2 = corr; + bestOffs2 = i; + } + } + + // Scans surroundings of the found best match with small stepping + int end = _MIN(bestOffs + SCANWIND + 1, seekLength); + for (i = bestOffs - SCANWIND; i < end; i++) + { + if (i == bestOffs) continue; // this offset already calculated, thus skip + + // Calculates correlation value for the mixing position corresponding + // to 'i' + corr = (float)calcCrossCorr(refPos + channels*i, pMidBuffer, norm); + // heuristic rule to slightly favour values close to mid of the range + float tmp = (float)(2 * i - seekLength - 1) / (float)seekLength; + corr = ((corr + 0.1f) * (1.0f - 0.25f * tmp * tmp)); + + // Checks for the highest correlation value + if (corr > bestCorr) + { + bestCorr = corr; + bestOffs = i; + } + } + + // Scans surroundings of the 2nd best match with small stepping + end = _MIN(bestOffs2 + SCANWIND + 1, seekLength); + for (i = bestOffs2 - SCANWIND; i < end; i++) + { + if (i == bestOffs2) continue; // this offset already calculated, thus skip + + // Calculates correlation value for the mixing position corresponding + // to 'i' + corr = (float)calcCrossCorr(refPos + channels*i, pMidBuffer, norm); + // heuristic rule to slightly favour values close to mid of the range + float tmp = (float)(2 * i - seekLength - 1) / (float)seekLength; + corr = ((corr + 0.1f) * (1.0f - 0.25f * tmp * tmp)); + + // Checks for the highest correlation value + if (corr > bestCorr) + { + bestCorr = corr; + bestOffs = i; + } + } + + // clear cross correlation routine state if necessary (is so e.g. in MMX routines). + clearCrossCorrState(); + +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + adaptNormalizer(); +#endif + + return bestOffs; +} + + + + +/// For integer algorithm: adapt normalization factor divider with music so that +/// it'll not be pessimistically restrictive that can degrade quality on quieter sections +/// yet won't cause integer overflows either +void TDStretch::adaptNormalizer() +{ + // Do not adapt normalizer over too silent sequences to avoid averaging filter depleting to + // too low values during pauses in music + if ((maxnorm > 1000) || (maxnormf > 40000000)) + { + //norm averaging filter + maxnormf = 0.9f * maxnormf + 0.1f * (float)maxnorm; + + if ((maxnorm > 800000000) && (overlapDividerBitsNorm < 16)) + { + // large values, so increase divider + overlapDividerBitsNorm++; + if (maxnorm > 1600000000) overlapDividerBitsNorm++; // extra large value => extra increase + } + else if ((maxnormf < 1000000) && (overlapDividerBitsNorm > 0)) + { + // extra small values, decrease divider + overlapDividerBitsNorm--; + } + } + + maxnorm = 0; +} + + +/// clear cross correlation routine state if necessary +void TDStretch::clearCrossCorrState() +{ + // default implementation is empty. +} + + +/// Calculates processing sequence length according to tempo setting +void TDStretch::calcSeqParameters() +{ + // Adjust tempo param according to tempo, so that variating processing sequence length is used + // at various tempo settings, between the given low...top limits + #define AUTOSEQ_TEMPO_LOW 0.5 // auto setting low tempo range (-50%) + #define AUTOSEQ_TEMPO_TOP 2.0 // auto setting top tempo range (+100%) + + // sequence-ms setting values at above low & top tempo + #define AUTOSEQ_AT_MIN 90.0 + #define AUTOSEQ_AT_MAX 40.0 + #define AUTOSEQ_K ((AUTOSEQ_AT_MAX - AUTOSEQ_AT_MIN) / (AUTOSEQ_TEMPO_TOP - AUTOSEQ_TEMPO_LOW)) + #define AUTOSEQ_C (AUTOSEQ_AT_MIN - (AUTOSEQ_K) * (AUTOSEQ_TEMPO_LOW)) + + // seek-window-ms setting values at above low & top tempoq + #define AUTOSEEK_AT_MIN 20.0 + #define AUTOSEEK_AT_MAX 15.0 + #define AUTOSEEK_K ((AUTOSEEK_AT_MAX - AUTOSEEK_AT_MIN) / (AUTOSEQ_TEMPO_TOP - AUTOSEQ_TEMPO_LOW)) + #define AUTOSEEK_C (AUTOSEEK_AT_MIN - (AUTOSEEK_K) * (AUTOSEQ_TEMPO_LOW)) + + #define CHECK_LIMITS(x, mi, ma) (((x) < (mi)) ? (mi) : (((x) > (ma)) ? (ma) : (x))) + + double seq, seek; + + if (bAutoSeqSetting) + { + seq = AUTOSEQ_C + AUTOSEQ_K * tempo; + seq = CHECK_LIMITS(seq, AUTOSEQ_AT_MAX, AUTOSEQ_AT_MIN); + sequenceMs = (int)(seq + 0.5); + } + + if (bAutoSeekSetting) + { + seek = AUTOSEEK_C + AUTOSEEK_K * tempo; + seek = CHECK_LIMITS(seek, AUTOSEEK_AT_MAX, AUTOSEEK_AT_MIN); + seekWindowMs = (int)(seek + 0.5); + } + + // Update seek window lengths + seekWindowLength = (sampleRate * sequenceMs) / 1000; + if (seekWindowLength < 2 * overlapLength) + { + seekWindowLength = 2 * overlapLength; + } + seekLength = (sampleRate * seekWindowMs) / 1000; +} + + + +// Sets new target tempo. Normal tempo = 'SCALE', smaller values represent slower +// tempo, larger faster tempo. +void TDStretch::setTempo(double newTempo) +{ + int intskip; + + tempo = newTempo; + + // Calculate new sequence duration + calcSeqParameters(); + + // Calculate ideal skip length (according to tempo value) + nominalSkip = tempo * (seekWindowLength - overlapLength); + intskip = (int)(nominalSkip + 0.5); + + // Calculate how many samples are needed in the 'inputBuffer' to + // process another batch of samples + //sampleReq = max(intskip + overlapLength, seekWindowLength) + seekLength / 2; + sampleReq = max(intskip + overlapLength, seekWindowLength) + seekLength; +} + + + +// Sets the number of channels, 1 = mono, 2 = stereo +void TDStretch::setChannels(int numChannels) +{ + if (!verifyNumberOfChannels(numChannels) || + (channels == numChannels)) return; + + channels = numChannels; + inputBuffer.setChannels(channels); + outputBuffer.setChannels(channels); + + // re-init overlap/buffer + overlapLength=0; + setParameters(sampleRate); +} + + +// nominal tempo, no need for processing, just pass the samples through +// to outputBuffer +/* +void TDStretch::processNominalTempo() +{ + assert(tempo == 1.0f); + + if (bMidBufferDirty) + { + // If there are samples in pMidBuffer waiting for overlapping, + // do a single sliding overlapping with them in order to prevent a + // clicking distortion in the output sound + if (inputBuffer.numSamples() < overlapLength) + { + // wait until we've got overlapLength input samples + return; + } + // Mix the samples in the beginning of 'inputBuffer' with the + // samples in 'midBuffer' using sliding overlapping + overlap(outputBuffer.ptrEnd(overlapLength), inputBuffer.ptrBegin(), 0); + outputBuffer.putSamples(overlapLength); + inputBuffer.receiveSamples(overlapLength); + clearMidBuffer(); + // now we've caught the nominal sample flow and may switch to + // bypass mode + } + + // Simply bypass samples from input to output + outputBuffer.moveSamples(inputBuffer); +} +*/ + + +// Processes as many processing frames of the samples 'inputBuffer', store +// the result into 'outputBuffer' +void TDStretch::processSamples() +{ + int ovlSkip; + int offset = 0; + int temp; + + /* Removed this small optimization - can introduce a click to sound when tempo setting + crosses the nominal value + if (tempo == 1.0f) + { + // tempo not changed from the original, so bypass the processing + processNominalTempo(); + return; + } + */ + + // Process samples as long as there are enough samples in 'inputBuffer' + // to form a processing frame. + while ((int)inputBuffer.numSamples() >= sampleReq) + { + if (isBeginning == false) + { + // apart from the very beginning of the track, + // scan for the best overlapping position & do overlap-add + offset = seekBestOverlapPosition(inputBuffer.ptrBegin()); + + // Mix the samples in the 'inputBuffer' at position of 'offset' with the + // samples in 'midBuffer' using sliding overlapping + // ... first partially overlap with the end of the previous sequence + // (that's in 'midBuffer') + overlap(outputBuffer.ptrEnd((uint)overlapLength), inputBuffer.ptrBegin(), (uint)offset); + outputBuffer.putSamples((uint)overlapLength); + offset += overlapLength; + } + else + { + // Adjust processing offset at beginning of track by not perform initial overlapping + // and compensating that in the 'input buffer skip' calculation + isBeginning = false; + int skip = (int)(tempo * overlapLength + 0.5 * seekLength + 0.5); + + #ifdef ST_SIMD_AVOID_UNALIGNED + // in SIMD mode, round the skip amount to value corresponding to aligned memory address + if (channels == 1) + { + skip &= -4; + } + else if (channels == 2) + { + skip &= -2; + } + #endif + skipFract -= skip; + if (skipFract <= -nominalSkip) + { + skipFract = -nominalSkip; + } + } + + // ... then copy sequence samples from 'inputBuffer' to output: + + // crosscheck that we don't have buffer overflow... + if ((int)inputBuffer.numSamples() < (offset + seekWindowLength - overlapLength)) + { + continue; // just in case, shouldn't really happen + } + + // length of sequence + temp = (seekWindowLength - 2 * overlapLength); + outputBuffer.putSamples(inputBuffer.ptrBegin() + channels * offset, (uint)temp); + + // Copies the end of the current sequence from 'inputBuffer' to + // 'midBuffer' for being mixed with the beginning of the next + // processing sequence and so on + assert((offset + temp + overlapLength) <= (int)inputBuffer.numSamples()); + memcpy(pMidBuffer, inputBuffer.ptrBegin() + channels * (offset + temp), + channels * sizeof(SAMPLETYPE) * overlapLength); + + // Remove the processed samples from the input buffer. Update + // the difference between integer & nominal skip step to 'skipFract' + // in order to prevent the error from accumulating over time. + skipFract += nominalSkip; // real skip size + ovlSkip = (int)skipFract; // rounded to integer skip + skipFract -= ovlSkip; // maintain the fraction part, i.e. real vs. integer skip + inputBuffer.receiveSamples((uint)ovlSkip); + } +} + + +// Adds 'numsamples' pcs of samples from the 'samples' memory position into +// the input of the object. +void TDStretch::putSamples(const SAMPLETYPE *samples, uint nSamples) +{ + // Add the samples into the input buffer + inputBuffer.putSamples(samples, nSamples); + // Process the samples in input buffer + processSamples(); +} + + + +/// Set new overlap length parameter & reallocate RefMidBuffer if necessary. +void TDStretch::acceptNewOverlapLength(int newOverlapLength) +{ + int prevOvl; + + assert(newOverlapLength >= 0); + prevOvl = overlapLength; + overlapLength = newOverlapLength; + + if (overlapLength > prevOvl) + { + delete[] pMidBufferUnaligned; + + pMidBufferUnaligned = new SAMPLETYPE[overlapLength * channels + 16 / sizeof(SAMPLETYPE)]; + // ensure that 'pMidBuffer' is aligned to 16 byte boundary for efficiency + pMidBuffer = (SAMPLETYPE *)SOUNDTOUCH_ALIGN_POINTER_16(pMidBufferUnaligned); + + clearMidBuffer(); + } +} + + +// Operator 'new' is overloaded so that it automatically creates a suitable instance +// depending on if we've a MMX/SSE/etc-capable CPU available or not. +void * TDStretch::operator new(size_t s) +{ + // Notice! don't use "new TDStretch" directly, use "newInstance" to create a new instance instead! + ST_THROW_RT_ERROR("Error in TDStretch::new: Don't use 'new TDStretch' directly, use 'newInstance' member instead!"); + return newInstance(); +} + + +TDStretch * TDStretch::newInstance() +{ +#if defined(SOUNDTOUCH_ALLOW_MMX) || defined(SOUNDTOUCH_ALLOW_SSE) + uint uExtensions; + + uExtensions = detectCPUextensions(); +#endif + + // Check if MMX/SSE instruction set extensions supported by CPU + +#ifdef SOUNDTOUCH_ALLOW_MMX + // MMX routines available only with integer sample types + if (uExtensions & SUPPORT_MMX) + { + return ::new TDStretchMMX; + } + else +#endif // SOUNDTOUCH_ALLOW_MMX + + +#ifdef SOUNDTOUCH_ALLOW_SSE + if (uExtensions & SUPPORT_SSE) + { + // SSE support + return ::new TDStretchSSE; + } + else +#endif // SOUNDTOUCH_ALLOW_SSE + + { + // ISA optimizations not supported, use plain C version + return ::new TDStretch; + } +} + + +////////////////////////////////////////////////////////////////////////////// +// +// Integer arithmetic specific algorithm implementations. +// +////////////////////////////////////////////////////////////////////////////// + +#ifdef SOUNDTOUCH_INTEGER_SAMPLES + +// Overlaps samples in 'midBuffer' with the samples in 'input'. The 'Stereo' +// version of the routine. +void TDStretch::overlapStereo(short *poutput, const short *input) const +{ + int i; + short temp; + int cnt2; + + for (i = 0; i < overlapLength ; i ++) + { + temp = (short)(overlapLength - i); + cnt2 = 2 * i; + poutput[cnt2] = (input[cnt2] * i + pMidBuffer[cnt2] * temp ) / overlapLength; + poutput[cnt2 + 1] = (input[cnt2 + 1] * i + pMidBuffer[cnt2 + 1] * temp ) / overlapLength; + } +} + + +// Overlaps samples in 'midBuffer' with the samples in 'input'. The 'Multi' +// version of the routine. +void TDStretch::overlapMulti(short *poutput, const short *input) const +{ + short m1; + int i = 0; + + for (m1 = 0; m1 < overlapLength; m1 ++) + { + short m2 = (short)(overlapLength - m1); + for (int c = 0; c < channels; c ++) + { + poutput[i] = (input[i] * m1 + pMidBuffer[i] * m2) / overlapLength; + i++; + } + } +} + +// Calculates the x having the closest 2^x value for the given value +static int _getClosest2Power(double value) +{ + return (int)(log(value) / log(2.0) + 0.5); +} + + +/// Calculates overlap period length in samples. +/// Integer version rounds overlap length to closest power of 2 +/// for a divide scaling operation. +void TDStretch::calculateOverlapLength(int aoverlapMs) +{ + int newOvl; + + assert(aoverlapMs >= 0); + + // calculate overlap length so that it's power of 2 - thus it's easy to do + // integer division by right-shifting. Term "-1" at end is to account for + // the extra most significatnt bit left unused in result by signed multiplication + overlapDividerBitsPure = _getClosest2Power((sampleRate * aoverlapMs) / 1000.0) - 1; + if (overlapDividerBitsPure > 9) overlapDividerBitsPure = 9; + if (overlapDividerBitsPure < 3) overlapDividerBitsPure = 3; + newOvl = (int)pow(2.0, (int)overlapDividerBitsPure + 1); // +1 => account for -1 above + + acceptNewOverlapLength(newOvl); + + overlapDividerBitsNorm = overlapDividerBitsPure; + + // calculate sloping divider so that crosscorrelation operation won't + // overflow 32-bit register. Max. sum of the crosscorrelation sum without + // divider would be 2^30*(N^3-N)/3, where N = overlap length + slopingDivider = (newOvl * newOvl - 1) / 3; +} + + +double TDStretch::calcCrossCorr(const short *mixingPos, const short *compare, double &norm) +{ + long corr; + unsigned long lnorm; + int i; + + #ifdef ST_SIMD_AVOID_UNALIGNED + // in SIMD mode skip 'mixingPos' positions that aren't aligned to 16-byte boundary + if (((ulongptr)mixingPos) & 15) return -1e50; + #endif + + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = (channels * overlapLength) & -8; + + corr = lnorm = 0; + // Same routine for stereo and mono + for (i = 0; i < ilength; i += 2) + { + corr += (mixingPos[i] * compare[i] + + mixingPos[i + 1] * compare[i + 1]) >> overlapDividerBitsNorm; + lnorm += (mixingPos[i] * mixingPos[i] + + mixingPos[i + 1] * mixingPos[i + 1]) >> overlapDividerBitsNorm; + // do intermediate scalings to avoid integer overflow + } + + if (lnorm > maxnorm) + { + // modify 'maxnorm' inside critical section to avoid multi-access conflict if in OpenMP mode + #pragma omp critical + if (lnorm > maxnorm) + { + maxnorm = lnorm; + } + } + // Normalize result by dividing by sqrt(norm) - this step is easiest + // done using floating point operation + norm = (double)lnorm; + return (double)corr / sqrt((norm < 1e-9) ? 1.0 : norm); +} + + +/// Update cross-correlation by accumulating "norm" coefficient by previously calculated value +double TDStretch::calcCrossCorrAccumulate(const short *mixingPos, const short *compare, double &norm) +{ + long corr; + long lnorm; + int i; + + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = (channels * overlapLength) & -8; + + // cancel first normalizer tap from previous round + lnorm = 0; + for (i = 1; i <= channels; i ++) + { + lnorm -= (mixingPos[-i] * mixingPos[-i]) >> overlapDividerBitsNorm; + } + + corr = 0; + // Same routine for stereo and mono. + for (i = 0; i < ilength; i += 2) + { + corr += (mixingPos[i] * compare[i] + + mixingPos[i + 1] * compare[i + 1]) >> overlapDividerBitsNorm; + } + + // update normalizer with last samples of this round + for (int j = 0; j < channels; j ++) + { + i --; + lnorm += (mixingPos[i] * mixingPos[i]) >> overlapDividerBitsNorm; + } + + norm += (double)lnorm; + if (norm > maxnorm) + { + maxnorm = (unsigned long)norm; + } + + // Normalize result by dividing by sqrt(norm) - this step is easiest + // done using floating point operation + return (double)corr / sqrt((norm < 1e-9) ? 1.0 : norm); +} + +#endif // SOUNDTOUCH_INTEGER_SAMPLES + +////////////////////////////////////////////////////////////////////////////// +// +// Floating point arithmetic specific algorithm implementations. +// + +#ifdef SOUNDTOUCH_FLOAT_SAMPLES + +// Overlaps samples in 'midBuffer' with the samples in 'pInput' +void TDStretch::overlapStereo(float *pOutput, const float *pInput) const +{ + int i; + float fScale; + float f1; + float f2; + + fScale = 1.0f / (float)overlapLength; + + f1 = 0; + f2 = 1.0f; + + for (i = 0; i < 2 * (int)overlapLength ; i += 2) + { + pOutput[i + 0] = pInput[i + 0] * f1 + pMidBuffer[i + 0] * f2; + pOutput[i + 1] = pInput[i + 1] * f1 + pMidBuffer[i + 1] * f2; + + f1 += fScale; + f2 -= fScale; + } +} + + +// Overlaps samples in 'midBuffer' with the samples in 'input'. +void TDStretch::overlapMulti(float *pOutput, const float *pInput) const +{ + int i; + float fScale; + float f1; + float f2; + + fScale = 1.0f / (float)overlapLength; + + f1 = 0; + f2 = 1.0f; + + i=0; + for (int i2 = 0; i2 < overlapLength; i2 ++) + { + // note: Could optimize this slightly by taking into account that always channels > 2 + for (int c = 0; c < channels; c ++) + { + pOutput[i] = pInput[i] * f1 + pMidBuffer[i] * f2; + i++; + } + f1 += fScale; + f2 -= fScale; + } +} + + +/// Calculates overlapInMsec period length in samples. +void TDStretch::calculateOverlapLength(int overlapInMsec) +{ + int newOvl; + + assert(overlapInMsec >= 0); + newOvl = (sampleRate * overlapInMsec) / 1000; + if (newOvl < 16) newOvl = 16; + + // must be divisible by 8 + newOvl -= newOvl % 8; + + acceptNewOverlapLength(newOvl); +} + + +/// Calculate cross-correlation +double TDStretch::calcCrossCorr(const float *mixingPos, const float *compare, double &anorm) +{ + float corr; + float norm; + int i; + + #ifdef ST_SIMD_AVOID_UNALIGNED + // in SIMD mode skip 'mixingPos' positions that aren't aligned to 16-byte boundary + if (((ulongptr)mixingPos) & 15) return -1e50; + #endif + + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = (channels * overlapLength) & -8; + + corr = norm = 0; + // Same routine for stereo and mono + for (i = 0; i < ilength; i ++) + { + corr += mixingPos[i] * compare[i]; + norm += mixingPos[i] * mixingPos[i]; + } + + anorm = norm; + return corr / sqrt((norm < 1e-9 ? 1.0 : norm)); +} + + +/// Update cross-correlation by accumulating "norm" coefficient by previously calculated value +double TDStretch::calcCrossCorrAccumulate(const float *mixingPos, const float *compare, double &norm) +{ + float corr; + int i; + + corr = 0; + + // cancel first normalizer tap from previous round + for (i = 1; i <= channels; i ++) + { + norm -= mixingPos[-i] * mixingPos[-i]; + } + + // hint compiler autovectorization that loop length is divisible by 8 + int ilength = (channels * overlapLength) & -8; + + // Same routine for stereo and mono + for (i = 0; i < ilength; i ++) + { + corr += mixingPos[i] * compare[i]; + } + + // update normalizer with last samples of this round + for (int j = 0; j < channels; j ++) + { + i --; + norm += mixingPos[i] * mixingPos[i]; + } + + return corr / sqrt((norm < 1e-9 ? 1.0 : norm)); +} + + +#endif // SOUNDTOUCH_FLOAT_SAMPLES diff --git a/media/libsoundtouch/src/TDStretch.h b/media/libsoundtouch/src/TDStretch.h new file mode 100644 index 0000000000..3ef79c7cdf --- /dev/null +++ b/media/libsoundtouch/src/TDStretch.h @@ -0,0 +1,279 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Sampled sound tempo changer/time stretch algorithm. Changes the sound tempo +/// while maintaining the original pitch by using a time domain WSOLA-like method +/// with several performance-increasing tweaks. +/// +/// Note : MMX/SSE optimized functions reside in separate, platform-specific files +/// 'mmx_optimized.cpp' and 'sse_optimized.cpp' +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef TDStretch_H +#define TDStretch_H + +#include <stddef.h> +#include "STTypes.h" +#include "RateTransposer.h" +#include "FIFOSamplePipe.h" + +namespace soundtouch +{ + +/// Default values for sound processing parameters: +/// Notice that the default parameters are tuned for contemporary popular music +/// processing. For speech processing applications these parameters suit better: +/// #define DEFAULT_SEQUENCE_MS 40 +/// #define DEFAULT_SEEKWINDOW_MS 15 +/// #define DEFAULT_OVERLAP_MS 8 +/// + +/// Default length of a single processing sequence, in milliseconds. This determines to how +/// long sequences the original sound is chopped in the time-stretch algorithm. +/// +/// The larger this value is, the lesser sequences are used in processing. In principle +/// a bigger value sounds better when slowing down tempo, but worse when increasing tempo +/// and vice versa. +/// +/// Increasing this value reduces computational burden & vice versa. +//#define DEFAULT_SEQUENCE_MS 40 +#define DEFAULT_SEQUENCE_MS USE_AUTO_SEQUENCE_LEN + +/// Giving this value for the sequence length sets automatic parameter value +/// according to tempo setting (recommended) +#define USE_AUTO_SEQUENCE_LEN 0 + +/// Seeking window default length in milliseconds for algorithm that finds the best possible +/// overlapping location. This determines from how wide window the algorithm may look for an +/// optimal joining location when mixing the sound sequences back together. +/// +/// The bigger this window setting is, the higher the possibility to find a better mixing +/// position will become, but at the same time large values may cause a "drifting" artifact +/// because consequent sequences will be taken at more uneven intervals. +/// +/// If there's a disturbing artifact that sounds as if a constant frequency was drifting +/// around, try reducing this setting. +/// +/// Increasing this value increases computational burden & vice versa. +//#define DEFAULT_SEEKWINDOW_MS 15 +#define DEFAULT_SEEKWINDOW_MS USE_AUTO_SEEKWINDOW_LEN + +/// Giving this value for the seek window length sets automatic parameter value +/// according to tempo setting (recommended) +#define USE_AUTO_SEEKWINDOW_LEN 0 + +/// Overlap length in milliseconds. When the chopped sound sequences are mixed back together, +/// to form a continuous sound stream, this parameter defines over how long period the two +/// consecutive sequences are let to overlap each other. +/// +/// This shouldn't be that critical parameter. If you reduce the DEFAULT_SEQUENCE_MS setting +/// by a large amount, you might wish to try a smaller value on this. +/// +/// Increasing this value increases computational burden & vice versa. +#define DEFAULT_OVERLAP_MS 8 + + +/// Class that does the time-stretch (tempo change) effect for the processed +/// sound. +class TDStretch : public FIFOProcessor +{ +protected: + int channels; + int sampleReq; + + int overlapLength; + int seekLength; + int seekWindowLength; + int overlapDividerBitsNorm; + int overlapDividerBitsPure; + int slopingDivider; + int sampleRate; + int sequenceMs; + int seekWindowMs; + int overlapMs; + + unsigned long maxnorm; + float maxnormf; + + double tempo; + double nominalSkip; + double skipFract; + + bool bQuickSeek; + bool bAutoSeqSetting; + bool bAutoSeekSetting; + bool isBeginning; + + SAMPLETYPE *pMidBuffer; + SAMPLETYPE *pMidBufferUnaligned; + + FIFOSampleBuffer outputBuffer; + FIFOSampleBuffer inputBuffer; + + void acceptNewOverlapLength(int newOverlapLength); + + virtual void clearCrossCorrState(); + void calculateOverlapLength(int overlapMs); + + virtual double calcCrossCorr(const SAMPLETYPE *mixingPos, const SAMPLETYPE *compare, double &norm); + virtual double calcCrossCorrAccumulate(const SAMPLETYPE *mixingPos, const SAMPLETYPE *compare, double &norm); + + virtual int seekBestOverlapPositionFull(const SAMPLETYPE *refPos); + virtual int seekBestOverlapPositionQuick(const SAMPLETYPE *refPos); + virtual int seekBestOverlapPosition(const SAMPLETYPE *refPos); + + virtual void overlapStereo(SAMPLETYPE *output, const SAMPLETYPE *input) const; + virtual void overlapMono(SAMPLETYPE *output, const SAMPLETYPE *input) const; + virtual void overlapMulti(SAMPLETYPE *output, const SAMPLETYPE *input) const; + + void clearMidBuffer(); + void overlap(SAMPLETYPE *output, const SAMPLETYPE *input, uint ovlPos) const; + + void calcSeqParameters(); + void adaptNormalizer(); + + /// Changes the tempo of the given sound samples. + /// Returns amount of samples returned in the "output" buffer. + /// The maximum amount of samples that can be returned at a time is set by + /// the 'set_returnBuffer_size' function. + void processSamples(); + +public: + TDStretch(); + virtual ~TDStretch(); + + /// Operator 'new' is overloaded so that it automatically creates a suitable instance + /// depending on if we've a MMX/SSE/etc-capable CPU available or not. + static void *operator new(size_t s); + + /// Use this function instead of "new" operator to create a new instance of this class. + /// This function automatically chooses a correct feature set depending on if the CPU + /// supports MMX/SSE/etc extensions. + static TDStretch *newInstance(); + + /// Returns the output buffer object + FIFOSamplePipe *getOutput() { return &outputBuffer; }; + + /// Returns the input buffer object + FIFOSamplePipe *getInput() { return &inputBuffer; }; + + /// Sets new target tempo. Normal tempo = 'SCALE', smaller values represent slower + /// tempo, larger faster tempo. + void setTempo(double newTempo); + + /// Returns nonzero if there aren't any samples available for outputting. + virtual void clear(); + + /// Clears the input buffer + void clearInput(); + + /// Sets the number of channels, 1 = mono, 2 = stereo + void setChannels(int numChannels); + + /// Enables/disables the quick position seeking algorithm. Zero to disable, + /// nonzero to enable + void enableQuickSeek(bool enable); + + /// Returns nonzero if the quick seeking algorithm is enabled. + bool isQuickSeekEnabled() const; + + /// Sets routine control parameters. These control are certain time constants + /// defining how the sound is stretched to the desired duration. + // + /// 'sampleRate' = sample rate of the sound + /// 'sequenceMS' = one processing sequence length in milliseconds + /// 'seekwindowMS' = seeking window length for scanning the best overlapping + /// position + /// 'overlapMS' = overlapping length + void setParameters(int sampleRate, ///< Samplerate of sound being processed (Hz) + int sequenceMS = -1, ///< Single processing sequence length (ms) + int seekwindowMS = -1, ///< Offset seeking window length (ms) + int overlapMS = -1 ///< Sequence overlapping length (ms) + ); + + /// Get routine control parameters, see setParameters() function. + /// Any of the parameters to this function can be NULL, in such case corresponding parameter + /// value isn't returned. + void getParameters(int *pSampleRate, int *pSequenceMs, int *pSeekWindowMs, int *pOverlapMs) const; + + /// Adds 'numsamples' pcs of samples from the 'samples' memory position into + /// the input of the object. + virtual void putSamples( + const SAMPLETYPE *samples, ///< Input sample data + uint numSamples ///< Number of samples in 'samples' so that one sample + ///< contains both channels if stereo + ); + + /// return nominal input sample requirement for triggering a processing batch + int getInputSampleReq() const + { + return (int)(nominalSkip + 0.5); + } + + /// return nominal output sample amount when running a processing batch + int getOutputBatchSize() const + { + return seekWindowLength - overlapLength; + } + + /// return approximate initial input-output latency + int getLatency() const + { + return sampleReq; + } +}; + + +// Implementation-specific class declarations: + +#ifdef SOUNDTOUCH_ALLOW_MMX + /// Class that implements MMX optimized routines for 16bit integer samples type. + class TDStretchMMX : public TDStretch + { + protected: + double calcCrossCorr(const short *mixingPos, const short *compare, double &norm); + double calcCrossCorrAccumulate(const short *mixingPos, const short *compare, double &norm); + virtual void overlapStereo(short *output, const short *input) const; + virtual void clearCrossCorrState(); + }; +#endif /// SOUNDTOUCH_ALLOW_MMX + + +#ifdef SOUNDTOUCH_ALLOW_SSE + /// Class that implements SSE optimized routines for floating point samples type. + class TDStretchSSE : public TDStretch + { + protected: + double calcCrossCorr(const float *mixingPos, const float *compare, double &norm); + double calcCrossCorrAccumulate(const float *mixingPos, const float *compare, double &norm); + }; + +#endif /// SOUNDTOUCH_ALLOW_SSE + +} +#endif /// TDStretch_H diff --git a/media/libsoundtouch/src/cpu_detect.h b/media/libsoundtouch/src/cpu_detect.h new file mode 100644 index 0000000000..093b6097aa --- /dev/null +++ b/media/libsoundtouch/src/cpu_detect.h @@ -0,0 +1,55 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// A header file for detecting the Intel MMX instructions set extension. +/// +/// Please see 'mmx_win.cpp', 'mmx_cpp.cpp' and 'mmx_non_x86.cpp' for the +/// routine implementations for x86 Windows, x86 gnu version and non-x86 +/// platforms, respectively. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef _CPU_DETECT_H_ +#define _CPU_DETECT_H_ + +#include "STTypes.h" + +#define SUPPORT_MMX 0x0001 +#define SUPPORT_3DNOW 0x0002 +#define SUPPORT_ALTIVEC 0x0004 +#define SUPPORT_SSE 0x0008 +#define SUPPORT_SSE2 0x0010 + +/// Checks which instruction set extensions are supported by the CPU. +/// +/// \return A bitmask of supported extensions, see SUPPORT_... defines. +uint detectCPUextensions(void); + +/// Disables given set of instruction extensions. See SUPPORT_... defines. +void disableExtensions(uint wDisableMask); + +#endif // _CPU_DETECT_H_ diff --git a/media/libsoundtouch/src/cpu_detect_x86.cpp b/media/libsoundtouch/src/cpu_detect_x86.cpp new file mode 100644 index 0000000000..f0f026b20d --- /dev/null +++ b/media/libsoundtouch/src/cpu_detect_x86.cpp @@ -0,0 +1,130 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Generic version of the x86 CPU extension detection routine. +/// +/// This file is for GNU & other non-Windows compilers, see 'cpu_detect_x86_win.cpp' +/// for the Microsoft compiler version. +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include "cpu_detect.h" +#include "STTypes.h" + + +#if defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS) + #if defined(__GNUC__) && defined(HAVE_CPUID_H) + // gcc and clang + #include "cpuid.h" + #elif defined(_M_IX86) + // windows non-gcc + #include <intrin.h> + #endif + + #define bit_MMX (1 << 23) + #define bit_SSE (1 << 25) + #define bit_SSE2 (1 << 26) +#endif + + +////////////////////////////////////////////////////////////////////////////// +// +// processor instructions extension detection routines +// +////////////////////////////////////////////////////////////////////////////// + +// Flag variable indicating whick ISA extensions are disabled (for debugging) +static uint _dwDisabledISA = 0x00; // 0xffffffff; //<- use this to disable all extensions + +// Disables given set of instruction extensions. See SUPPORT_... defines. +void disableExtensions(uint dwDisableMask) +{ + _dwDisabledISA = dwDisableMask; +} + + +/// Checks which instruction set extensions are supported by the CPU. +uint detectCPUextensions(void) +{ +/// If building for a 64bit system (no Itanium) and the user wants optimizations. +/// Return the OR of SUPPORT_{MMX,SSE,SSE2}. 11001 or 0x19. +/// Keep the _dwDisabledISA test (2 more operations, could be eliminated). +#if ((defined(__GNUC__) && defined(__x86_64__)) \ + || defined(_M_X64)) \ + && defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS) + return 0x19 & ~_dwDisabledISA; + +/// If building for a 32bit system and the user wants optimizations. +/// Keep the _dwDisabledISA test (2 more operations, could be eliminated). +#elif ((defined(__GNUC__) && defined(__i386__)) \ + || defined(_M_IX86)) \ + && defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS) + + if (_dwDisabledISA == 0xffffffff) return 0; + + uint res = 0; + +#if !defined(__GNUC__) + // Window / VS version of cpuid. Notice that Visual Studio 2005 or later required + // for __cpuid intrinsic support. + int reg[4] = {-1}; + + // Check if no cpuid support. + __cpuid(reg,0); + if ((unsigned int)reg[0] == 0) return 0; // always disable extensions. + + __cpuid(reg,1); + if ((unsigned int)reg[3] & bit_MMX) res = res | SUPPORT_MMX; + if ((unsigned int)reg[3] & bit_SSE) res = res | SUPPORT_SSE; + if ((unsigned int)reg[3] & bit_SSE2) res = res | SUPPORT_SSE2; +#elif defined(HAVE_CPUID_H) + // GCC version of cpuid. Requires GCC 4.3.0 or later for __cpuid intrinsic support. + uint eax, ebx, ecx, edx; // unsigned int is the standard type. uint is defined by the compiler and not guaranteed to be portable. + + // Check if no cpuid support. + if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx)) return 0; // always disable extensions. + + if (edx & bit_MMX) res = res | SUPPORT_MMX; + if (edx & bit_SSE) res = res | SUPPORT_SSE; + if (edx & bit_SSE2) res = res | SUPPORT_SSE2; +#else + // Compatible with GCC but no cpuid.h. + return 0; +#endif + + return res & ~_dwDisabledISA; + +#else + +/// One of these is true: +/// 1) We don't want optimizations. +/// 2) Using an unsupported compiler. +/// 3) Running on a non-x86 platform. + return 0; + +#endif +} diff --git a/media/libsoundtouch/src/mmx_optimized.cpp b/media/libsoundtouch/src/mmx_optimized.cpp new file mode 100644 index 0000000000..0bc7fe86f7 --- /dev/null +++ b/media/libsoundtouch/src/mmx_optimized.cpp @@ -0,0 +1,396 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// MMX optimized routines. All MMX optimized functions have been gathered into +/// this single source code file, regardless to their class or original source +/// code file, in order to ease porting the library to other compiler and +/// processor platforms. +/// +/// The MMX-optimizations are programmed using MMX compiler intrinsics that +/// are supported both by Microsoft Visual C++ and GCC compilers, so this file +/// should compile with both toolsets. +/// +/// NOTICE: If using Visual Studio 6.0, you'll need to install the "Visual C++ +/// 6.0 processor pack" update to support compiler intrinsic syntax. The update +/// is available for download at Microsoft Developers Network, see here: +/// http://msdn.microsoft.com/en-us/vstudio/aa718349.aspx +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include "STTypes.h" + +#ifdef SOUNDTOUCH_ALLOW_MMX +// MMX routines available only with integer sample type + +using namespace soundtouch; + +////////////////////////////////////////////////////////////////////////////// +// +// implementation of MMX optimized functions of class 'TDStretchMMX' +// +////////////////////////////////////////////////////////////////////////////// + +#include "TDStretch.h" +#include <mmintrin.h> +#include <limits.h> +#include <math.h> + + +// Calculates cross correlation of two buffers +double TDStretchMMX::calcCrossCorr(const short *pV1, const short *pV2, double &dnorm) +{ + const __m64 *pVec1, *pVec2; + __m64 shifter; + __m64 accu, normaccu; + long corr, norm; + int i; + + pVec1 = (__m64*)pV1; + pVec2 = (__m64*)pV2; + + shifter = _m_from_int(overlapDividerBitsNorm); + normaccu = accu = _mm_setzero_si64(); + + // Process 4 parallel sets of 2 * stereo samples or 4 * mono samples + // during each round for improved CPU-level parallellization. + for (i = 0; i < channels * overlapLength / 16; i ++) + { + __m64 temp, temp2; + + // dictionary of instructions: + // _m_pmaddwd : 4*16bit multiply-add, resulting two 32bits = [a0*b0+a1*b1 ; a2*b2+a3*b3] + // _mm_add_pi32 : 2*32bit add + // _m_psrad : 32bit right-shift + + temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[0], pVec2[0]), shifter), + _mm_sra_pi32(_mm_madd_pi16(pVec1[1], pVec2[1]), shifter)); + temp2 = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[0], pVec1[0]), shifter), + _mm_sra_pi32(_mm_madd_pi16(pVec1[1], pVec1[1]), shifter)); + accu = _mm_add_pi32(accu, temp); + normaccu = _mm_add_pi32(normaccu, temp2); + + temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[2], pVec2[2]), shifter), + _mm_sra_pi32(_mm_madd_pi16(pVec1[3], pVec2[3]), shifter)); + temp2 = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[2], pVec1[2]), shifter), + _mm_sra_pi32(_mm_madd_pi16(pVec1[3], pVec1[3]), shifter)); + accu = _mm_add_pi32(accu, temp); + normaccu = _mm_add_pi32(normaccu, temp2); + + pVec1 += 4; + pVec2 += 4; + } + + // copy hi-dword of mm0 to lo-dword of mm1, then sum mmo+mm1 + // and finally store the result into the variable "corr" + + accu = _mm_add_pi32(accu, _mm_srli_si64(accu, 32)); + corr = _m_to_int(accu); + + normaccu = _mm_add_pi32(normaccu, _mm_srli_si64(normaccu, 32)); + norm = _m_to_int(normaccu); + + // Clear MMS state + _m_empty(); + + if (norm > (long)maxnorm) + { + // modify 'maxnorm' inside critical section to avoid multi-access conflict if in OpenMP mode + #pragma omp critical + if (norm > (long)maxnorm) + { + maxnorm = norm; + } + } + + // Normalize result by dividing by sqrt(norm) - this step is easiest + // done using floating point operation + dnorm = (double)norm; + + return (double)corr / sqrt(dnorm < 1e-9 ? 1.0 : dnorm); + // Note: Warning about the missing EMMS instruction is harmless + // as it'll be called elsewhere. +} + + +/// Update cross-correlation by accumulating "norm" coefficient by previously calculated value +double TDStretchMMX::calcCrossCorrAccumulate(const short *pV1, const short *pV2, double &dnorm) +{ + const __m64 *pVec1, *pVec2; + __m64 shifter; + __m64 accu; + long corr, lnorm; + int i; + + // cancel first normalizer tap from previous round + lnorm = 0; + for (i = 1; i <= channels; i ++) + { + lnorm -= (pV1[-i] * pV1[-i]) >> overlapDividerBitsNorm; + } + + pVec1 = (__m64*)pV1; + pVec2 = (__m64*)pV2; + + shifter = _m_from_int(overlapDividerBitsNorm); + accu = _mm_setzero_si64(); + + // Process 4 parallel sets of 2 * stereo samples or 4 * mono samples + // during each round for improved CPU-level parallellization. + for (i = 0; i < channels * overlapLength / 16; i ++) + { + __m64 temp; + + // dictionary of instructions: + // _m_pmaddwd : 4*16bit multiply-add, resulting two 32bits = [a0*b0+a1*b1 ; a2*b2+a3*b3] + // _mm_add_pi32 : 2*32bit add + // _m_psrad : 32bit right-shift + + temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[0], pVec2[0]), shifter), + _mm_sra_pi32(_mm_madd_pi16(pVec1[1], pVec2[1]), shifter)); + accu = _mm_add_pi32(accu, temp); + + temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[2], pVec2[2]), shifter), + _mm_sra_pi32(_mm_madd_pi16(pVec1[3], pVec2[3]), shifter)); + accu = _mm_add_pi32(accu, temp); + + pVec1 += 4; + pVec2 += 4; + } + + // copy hi-dword of mm0 to lo-dword of mm1, then sum mmo+mm1 + // and finally store the result into the variable "corr" + + accu = _mm_add_pi32(accu, _mm_srli_si64(accu, 32)); + corr = _m_to_int(accu); + + // Clear MMS state + _m_empty(); + + // update normalizer with last samples of this round + pV1 = (short *)pVec1; + for (int j = 1; j <= channels; j ++) + { + lnorm += (pV1[-j] * pV1[-j]) >> overlapDividerBitsNorm; + } + dnorm += (double)lnorm; + + if (lnorm > (long)maxnorm) + { + maxnorm = lnorm; + } + + // Normalize result by dividing by sqrt(norm) - this step is easiest + // done using floating point operation + return (double)corr / sqrt((dnorm < 1e-9) ? 1.0 : dnorm); +} + + +void TDStretchMMX::clearCrossCorrState() +{ + // Clear MMS state + _m_empty(); + //_asm EMMS; +} + + +// MMX-optimized version of the function overlapStereo +void TDStretchMMX::overlapStereo(short *output, const short *input) const +{ + const __m64 *pVinput, *pVMidBuf; + __m64 *pVdest; + __m64 mix1, mix2, adder, shifter; + int i; + + pVinput = (const __m64*)input; + pVMidBuf = (const __m64*)pMidBuffer; + pVdest = (__m64*)output; + + // mix1 = mixer values for 1st stereo sample + // mix1 = mixer values for 2nd stereo sample + // adder = adder for updating mixer values after each round + + mix1 = _mm_set_pi16(0, overlapLength, 0, overlapLength); + adder = _mm_set_pi16(1, -1, 1, -1); + mix2 = _mm_add_pi16(mix1, adder); + adder = _mm_add_pi16(adder, adder); + + // Overlaplength-division by shifter. "+1" is to account for "-1" deduced in + // overlapDividerBits calculation earlier. + shifter = _m_from_int(overlapDividerBitsPure + 1); + + for (i = 0; i < overlapLength / 4; i ++) + { + __m64 temp1, temp2; + + // load & shuffle data so that input & mixbuffer data samples are paired + temp1 = _mm_unpacklo_pi16(pVMidBuf[0], pVinput[0]); // = i0l m0l i0r m0r + temp2 = _mm_unpackhi_pi16(pVMidBuf[0], pVinput[0]); // = i1l m1l i1r m1r + + // temp = (temp .* mix) >> shifter + temp1 = _mm_sra_pi32(_mm_madd_pi16(temp1, mix1), shifter); + temp2 = _mm_sra_pi32(_mm_madd_pi16(temp2, mix2), shifter); + pVdest[0] = _mm_packs_pi32(temp1, temp2); // pack 2*2*32bit => 4*16bit + + // update mix += adder + mix1 = _mm_add_pi16(mix1, adder); + mix2 = _mm_add_pi16(mix2, adder); + + // --- second round begins here --- + + // load & shuffle data so that input & mixbuffer data samples are paired + temp1 = _mm_unpacklo_pi16(pVMidBuf[1], pVinput[1]); // = i2l m2l i2r m2r + temp2 = _mm_unpackhi_pi16(pVMidBuf[1], pVinput[1]); // = i3l m3l i3r m3r + + // temp = (temp .* mix) >> shifter + temp1 = _mm_sra_pi32(_mm_madd_pi16(temp1, mix1), shifter); + temp2 = _mm_sra_pi32(_mm_madd_pi16(temp2, mix2), shifter); + pVdest[1] = _mm_packs_pi32(temp1, temp2); // pack 2*2*32bit => 4*16bit + + // update mix += adder + mix1 = _mm_add_pi16(mix1, adder); + mix2 = _mm_add_pi16(mix2, adder); + + pVinput += 2; + pVMidBuf += 2; + pVdest += 2; + } + + _m_empty(); // clear MMS state +} + + +////////////////////////////////////////////////////////////////////////////// +// +// implementation of MMX optimized functions of class 'FIRFilter' +// +////////////////////////////////////////////////////////////////////////////// + +#include "FIRFilter.h" + + +FIRFilterMMX::FIRFilterMMX() : FIRFilter() +{ + filterCoeffsAlign = NULL; + filterCoeffsUnalign = NULL; +} + + +FIRFilterMMX::~FIRFilterMMX() +{ + delete[] filterCoeffsUnalign; +} + + +// (overloaded) Calculates filter coefficients for MMX routine +void FIRFilterMMX::setCoefficients(const short *coeffs, uint newLength, uint uResultDivFactor) +{ + uint i; + FIRFilter::setCoefficients(coeffs, newLength, uResultDivFactor); + + // Ensure that filter coeffs array is aligned to 16-byte boundary + delete[] filterCoeffsUnalign; + filterCoeffsUnalign = new short[2 * newLength + 8]; + filterCoeffsAlign = (short *)SOUNDTOUCH_ALIGN_POINTER_16(filterCoeffsUnalign); + + // rearrange the filter coefficients for mmx routines + for (i = 0;i < length; i += 4) + { + filterCoeffsAlign[2 * i + 0] = coeffs[i + 0]; + filterCoeffsAlign[2 * i + 1] = coeffs[i + 2]; + filterCoeffsAlign[2 * i + 2] = coeffs[i + 0]; + filterCoeffsAlign[2 * i + 3] = coeffs[i + 2]; + + filterCoeffsAlign[2 * i + 4] = coeffs[i + 1]; + filterCoeffsAlign[2 * i + 5] = coeffs[i + 3]; + filterCoeffsAlign[2 * i + 6] = coeffs[i + 1]; + filterCoeffsAlign[2 * i + 7] = coeffs[i + 3]; + } +} + + +// mmx-optimized version of the filter routine for stereo sound +uint FIRFilterMMX::evaluateFilterStereo(short *dest, const short *src, uint numSamples) const +{ + // Create stack copies of the needed member variables for asm routines : + uint i, j; + __m64 *pVdest = (__m64*)dest; + + if (length < 2) return 0; + + for (i = 0; i < (numSamples - length) / 2; i ++) + { + __m64 accu1; + __m64 accu2; + const __m64 *pVsrc = (const __m64*)src; + const __m64 *pVfilter = (const __m64*)filterCoeffsAlign; + + accu1 = accu2 = _mm_setzero_si64(); + for (j = 0; j < lengthDiv8 * 2; j ++) + { + __m64 temp1, temp2; + + temp1 = _mm_unpacklo_pi16(pVsrc[0], pVsrc[1]); // = l2 l0 r2 r0 + temp2 = _mm_unpackhi_pi16(pVsrc[0], pVsrc[1]); // = l3 l1 r3 r1 + + accu1 = _mm_add_pi32(accu1, _mm_madd_pi16(temp1, pVfilter[0])); // += l2*f2+l0*f0 r2*f2+r0*f0 + accu1 = _mm_add_pi32(accu1, _mm_madd_pi16(temp2, pVfilter[1])); // += l3*f3+l1*f1 r3*f3+r1*f1 + + temp1 = _mm_unpacklo_pi16(pVsrc[1], pVsrc[2]); // = l4 l2 r4 r2 + + accu2 = _mm_add_pi32(accu2, _mm_madd_pi16(temp2, pVfilter[0])); // += l3*f2+l1*f0 r3*f2+r1*f0 + accu2 = _mm_add_pi32(accu2, _mm_madd_pi16(temp1, pVfilter[1])); // += l4*f3+l2*f1 r4*f3+r2*f1 + + // accu1 += l2*f2+l0*f0 r2*f2+r0*f0 + // += l3*f3+l1*f1 r3*f3+r1*f1 + + // accu2 += l3*f2+l1*f0 r3*f2+r1*f0 + // l4*f3+l2*f1 r4*f3+r2*f1 + + pVfilter += 2; + pVsrc += 2; + } + // accu >>= resultDivFactor + accu1 = _mm_srai_pi32(accu1, resultDivFactor); + accu2 = _mm_srai_pi32(accu2, resultDivFactor); + + // pack 2*2*32bits => 4*16 bits + pVdest[0] = _mm_packs_pi32(accu1, accu2); + src += 4; + pVdest ++; + } + + _m_empty(); // clear emms state + + return (numSamples & 0xfffffffe) - length; +} + +#else + +// workaround to not complain about empty module +bool _dontcomplain_mmx_empty; + +#endif // SOUNDTOUCH_ALLOW_MMX diff --git a/media/libsoundtouch/src/moz.build b/media/libsoundtouch/src/moz.build new file mode 100644 index 0000000000..63173892f2 --- /dev/null +++ b/media/libsoundtouch/src/moz.build @@ -0,0 +1,53 @@ +# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*- +# vim: set filetype=python: +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +EXPORTS.soundtouch += [ + 'FIFOSamplePipe.h', + 'SoundTouch.h', + 'soundtouch_config.h', + 'SoundTouchFactory.h', + 'STTypes.h', +] + +UNIFIED_SOURCES += [ + 'AAFilter.cpp', + 'cpu_detect_x86.cpp', + 'FIFOSampleBuffer.cpp', + 'FIRFilter.cpp', + 'InterpolateCubic.cpp', + 'InterpolateLinear.cpp', + 'InterpolateShannon.cpp', + 'RateTransposer.cpp', + 'SoundTouch.cpp', + 'SoundTouchFactory.cpp', + 'TDStretch.cpp', +] + +if CONFIG['INTEL_ARCHITECTURE']: + if CONFIG['MOZ_SAMPLE_TYPE_FLOAT32']: + SOURCES += ['sse_optimized.cpp'] + SOURCES['sse_optimized.cpp'].flags += CONFIG['SSE2_FLAGS'] + else: + SOURCES += ['mmx_optimized.cpp'] + SOURCES['mmx_optimized.cpp'].flags += CONFIG['MMX_FLAGS'] + +if CONFIG['OS_ARCH'] != 'WINNT': + # GCC/Clang require permissions to be explicitly set for the soundtouch + # header. + CXXFLAGS += ['-include', SRCDIR + '/soundtouch_perms.h'] +else: + # Windows need alloca renamed to _alloca + DEFINES['alloca'] = '_alloca' + +DEFINES['BUILDING_SOUNDTOUCH'] = 1 + +# We allow warnings for third-party code that can be updated from upstream. +AllowCompilerWarnings() + +FINAL_LIBRARY = 'lgpllibs' + +# Use abort() instead of exception in SoundTouch. +DEFINES['ST_NO_EXCEPTION_HANDLING'] = 1 diff --git a/media/libsoundtouch/src/soundtouch_config.h b/media/libsoundtouch/src/soundtouch_config.h new file mode 100644 index 0000000000..469bb822af --- /dev/null +++ b/media/libsoundtouch/src/soundtouch_config.h @@ -0,0 +1,7 @@ +#include "mozilla/SSE.h" + +#ifdef MOZ_SAMPLE_TYPE_FLOAT32 +#define SOUNDTOUCH_FLOAT_SAMPLES 1 +#else +#define SOUNDTOUCH_INTEGER_SAMPLES 1 +#endif diff --git a/media/libsoundtouch/src/soundtouch_perms.h b/media/libsoundtouch/src/soundtouch_perms.h new file mode 100644 index 0000000000..0af2fe6183 --- /dev/null +++ b/media/libsoundtouch/src/soundtouch_perms.h @@ -0,0 +1,18 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Include file for fixing symbol visibility on non-windows platforms, until +// system headers wrappers work uniformly across all of them. + +#ifndef MOZILLA_SOUNDTOUCH_PERMS_H +#define MOZILLA_SOUNDTOUCH_PERMS_H + +#pragma GCC visibility push(default) +#include "SoundTouch.h" +#include "SoundTouchFactory.h" +#pragma GCC visibility pop + +#endif // MOZILLA_SOUNDTOUCH_PERMS_H diff --git a/media/libsoundtouch/src/sse_optimized.cpp b/media/libsoundtouch/src/sse_optimized.cpp new file mode 100644 index 0000000000..9c16ea8f89 --- /dev/null +++ b/media/libsoundtouch/src/sse_optimized.cpp @@ -0,0 +1,365 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// SSE optimized routines for Pentium-III, Athlon-XP and later CPUs. All SSE +/// optimized functions have been gathered into this single source +/// code file, regardless to their class or original source code file, in order +/// to ease porting the library to other compiler and processor platforms. +/// +/// The SSE-optimizations are programmed using SSE compiler intrinsics that +/// are supported both by Microsoft Visual C++ and GCC compilers, so this file +/// should compile with both toolsets. +/// +/// NOTICE: If using Visual Studio 6.0, you'll need to install the "Visual C++ +/// 6.0 processor pack" update to support SSE instruction set. The update is +/// available for download at Microsoft Developers Network, see here: +/// http://msdn.microsoft.com/en-us/vstudio/aa718349.aspx +/// +/// If the above URL is expired or removed, go to "http://msdn.microsoft.com" and +/// perform a search with keywords "processor pack". +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#include "cpu_detect.h" +#include "STTypes.h" + +using namespace soundtouch; + +#ifdef SOUNDTOUCH_ALLOW_SSE + +// SSE routines available only with float sample type + +////////////////////////////////////////////////////////////////////////////// +// +// implementation of SSE optimized functions of class 'TDStretchSSE' +// +////////////////////////////////////////////////////////////////////////////// + +#include "TDStretch.h" +#include <xmmintrin.h> +#include <math.h> + +// Calculates cross correlation of two buffers +double TDStretchSSE::calcCrossCorr(const float *pV1, const float *pV2, double &anorm) +{ + int i; + const float *pVec1; + const __m128 *pVec2; + __m128 vSum, vNorm; + + // Note. It means a major slow-down if the routine needs to tolerate + // unaligned __m128 memory accesses. It's way faster if we can skip + // unaligned slots and use _mm_load_ps instruction instead of _mm_loadu_ps. + // This can mean up to ~ 10-fold difference (incl. part of which is + // due to skipping every second round for stereo sound though). + // + // Compile-time define SOUNDTOUCH_ALLOW_NONEXACT_SIMD_OPTIMIZATION is provided + // for choosing if this little cheating is allowed. + +#ifdef ST_SIMD_AVOID_UNALIGNED + // Little cheating allowed, return valid correlation only for + // aligned locations, meaning every second round for stereo sound. + + #define _MM_LOAD _mm_load_ps + + if (((ulongptr)pV1) & 15) return -1e50; // skip unaligned locations + +#else + // No cheating allowed, use unaligned load & take the resulting + // performance hit. + #define _MM_LOAD _mm_loadu_ps +#endif + + // ensure overlapLength is divisible by 8 + assert((overlapLength % 8) == 0); + + // Calculates the cross-correlation value between 'pV1' and 'pV2' vectors + // Note: pV2 _must_ be aligned to 16-bit boundary, pV1 need not. + pVec1 = (const float*)pV1; + pVec2 = (const __m128*)pV2; + vSum = vNorm = _mm_setzero_ps(); + + // Unroll the loop by factor of 4 * 4 operations. Use same routine for + // stereo & mono, for mono it just means twice the amount of unrolling. + for (i = 0; i < channels * overlapLength / 16; i ++) + { + __m128 vTemp; + // vSum += pV1[0..3] * pV2[0..3] + vTemp = _MM_LOAD(pVec1); + vSum = _mm_add_ps(vSum, _mm_mul_ps(vTemp ,pVec2[0])); + vNorm = _mm_add_ps(vNorm, _mm_mul_ps(vTemp ,vTemp)); + + // vSum += pV1[4..7] * pV2[4..7] + vTemp = _MM_LOAD(pVec1 + 4); + vSum = _mm_add_ps(vSum, _mm_mul_ps(vTemp, pVec2[1])); + vNorm = _mm_add_ps(vNorm, _mm_mul_ps(vTemp ,vTemp)); + + // vSum += pV1[8..11] * pV2[8..11] + vTemp = _MM_LOAD(pVec1 + 8); + vSum = _mm_add_ps(vSum, _mm_mul_ps(vTemp, pVec2[2])); + vNorm = _mm_add_ps(vNorm, _mm_mul_ps(vTemp ,vTemp)); + + // vSum += pV1[12..15] * pV2[12..15] + vTemp = _MM_LOAD(pVec1 + 12); + vSum = _mm_add_ps(vSum, _mm_mul_ps(vTemp, pVec2[3])); + vNorm = _mm_add_ps(vNorm, _mm_mul_ps(vTemp ,vTemp)); + + pVec1 += 16; + pVec2 += 4; + } + + // return value = vSum[0] + vSum[1] + vSum[2] + vSum[3] + float *pvNorm = (float*)&vNorm; + float norm = (pvNorm[0] + pvNorm[1] + pvNorm[2] + pvNorm[3]); + anorm = norm; + + float *pvSum = (float*)&vSum; + return (double)(pvSum[0] + pvSum[1] + pvSum[2] + pvSum[3]) / sqrt(norm < 1e-9 ? 1.0 : norm); + + /* This is approximately corresponding routine in C-language yet without normalization: + double corr, norm; + uint i; + + // Calculates the cross-correlation value between 'pV1' and 'pV2' vectors + corr = norm = 0.0; + for (i = 0; i < channels * overlapLength / 16; i ++) + { + corr += pV1[0] * pV2[0] + + pV1[1] * pV2[1] + + pV1[2] * pV2[2] + + pV1[3] * pV2[3] + + pV1[4] * pV2[4] + + pV1[5] * pV2[5] + + pV1[6] * pV2[6] + + pV1[7] * pV2[7] + + pV1[8] * pV2[8] + + pV1[9] * pV2[9] + + pV1[10] * pV2[10] + + pV1[11] * pV2[11] + + pV1[12] * pV2[12] + + pV1[13] * pV2[13] + + pV1[14] * pV2[14] + + pV1[15] * pV2[15]; + + for (j = 0; j < 15; j ++) norm += pV1[j] * pV1[j]; + + pV1 += 16; + pV2 += 16; + } + return corr / sqrt(norm); + */ +} + + + +double TDStretchSSE::calcCrossCorrAccumulate(const float *pV1, const float *pV2, double &norm) +{ + // call usual calcCrossCorr function because SSE does not show big benefit of + // accumulating "norm" value, and also the "norm" rolling algorithm would get + // complicated due to SSE-specific alignment-vs-nonexact correlation rules. + return calcCrossCorr(pV1, pV2, norm); +} + + +////////////////////////////////////////////////////////////////////////////// +// +// implementation of SSE optimized functions of class 'FIRFilter' +// +////////////////////////////////////////////////////////////////////////////// + +#include "FIRFilter.h" + +FIRFilterSSE::FIRFilterSSE() : FIRFilter() +{ + filterCoeffsAlign = NULL; + filterCoeffsUnalign = NULL; +} + + +FIRFilterSSE::~FIRFilterSSE() +{ + delete[] filterCoeffsUnalign; + filterCoeffsAlign = NULL; + filterCoeffsUnalign = NULL; +} + + +// (overloaded) Calculates filter coefficients for SSE routine +void FIRFilterSSE::setCoefficients(const float *coeffs, uint newLength, uint uResultDivFactor) +{ + uint i; + float fDivider; + + FIRFilter::setCoefficients(coeffs, newLength, uResultDivFactor); + + // Scale the filter coefficients so that it won't be necessary to scale the filtering result + // also rearrange coefficients suitably for SSE + // Ensure that filter coeffs array is aligned to 16-byte boundary + delete[] filterCoeffsUnalign; + filterCoeffsUnalign = new float[2 * newLength + 4]; + filterCoeffsAlign = (float *)SOUNDTOUCH_ALIGN_POINTER_16(filterCoeffsUnalign); + + fDivider = (float)resultDivider; + + // rearrange the filter coefficients for mmx routines + for (i = 0; i < newLength; i ++) + { + filterCoeffsAlign[2 * i + 0] = + filterCoeffsAlign[2 * i + 1] = coeffs[i + 0] / fDivider; + } +} + + + +// SSE-optimized version of the filter routine for stereo sound +uint FIRFilterSSE::evaluateFilterStereo(float *dest, const float *source, uint numSamples) const +{ + int count = (int)((numSamples - length) & (uint)-2); + int j; + + assert(count % 2 == 0); + + if (count < 2) return 0; + + assert(source != NULL); + assert(dest != NULL); + assert((length % 8) == 0); + assert(filterCoeffsAlign != NULL); + assert(((ulongptr)filterCoeffsAlign) % 16 == 0); + + // filter is evaluated for two stereo samples with each iteration, thus use of 'j += 2' + #pragma omp parallel for + for (j = 0; j < count; j += 2) + { + const float *pSrc; + float *pDest; + const __m128 *pFil; + __m128 sum1, sum2; + uint i; + + pSrc = (const float*)source + j * 2; // source audio data + pDest = dest + j * 2; // destination audio data + pFil = (const __m128*)filterCoeffsAlign; // filter coefficients. NOTE: Assumes coefficients + // are aligned to 16-byte boundary + sum1 = sum2 = _mm_setzero_ps(); + + for (i = 0; i < length / 8; i ++) + { + // Unroll loop for efficiency & calculate filter for 2*2 stereo samples + // at each pass + + // sum1 is accu for 2*2 filtered stereo sound data at the primary sound data offset + // sum2 is accu for 2*2 filtered stereo sound data for the next sound sample offset. + + sum1 = _mm_add_ps(sum1, _mm_mul_ps(_mm_loadu_ps(pSrc) , pFil[0])); + sum2 = _mm_add_ps(sum2, _mm_mul_ps(_mm_loadu_ps(pSrc + 2), pFil[0])); + + sum1 = _mm_add_ps(sum1, _mm_mul_ps(_mm_loadu_ps(pSrc + 4), pFil[1])); + sum2 = _mm_add_ps(sum2, _mm_mul_ps(_mm_loadu_ps(pSrc + 6), pFil[1])); + + sum1 = _mm_add_ps(sum1, _mm_mul_ps(_mm_loadu_ps(pSrc + 8) , pFil[2])); + sum2 = _mm_add_ps(sum2, _mm_mul_ps(_mm_loadu_ps(pSrc + 10), pFil[2])); + + sum1 = _mm_add_ps(sum1, _mm_mul_ps(_mm_loadu_ps(pSrc + 12), pFil[3])); + sum2 = _mm_add_ps(sum2, _mm_mul_ps(_mm_loadu_ps(pSrc + 14), pFil[3])); + + pSrc += 16; + pFil += 4; + } + + // Now sum1 and sum2 both have a filtered 2-channel sample each, but we still need + // to sum the two hi- and lo-floats of these registers together. + + // post-shuffle & add the filtered values and store to dest. + _mm_storeu_ps(pDest, _mm_add_ps( + _mm_shuffle_ps(sum1, sum2, _MM_SHUFFLE(1,0,3,2)), // s2_1 s2_0 s1_3 s1_2 + _mm_shuffle_ps(sum1, sum2, _MM_SHUFFLE(3,2,1,0)) // s2_3 s2_2 s1_1 s1_0 + )); + } + + // Ideas for further improvement: + // 1. If it could be guaranteed that 'source' were always aligned to 16-byte + // boundary, a faster aligned '_mm_load_ps' instruction could be used. + // 2. If it could be guaranteed that 'dest' were always aligned to 16-byte + // boundary, a faster '_mm_store_ps' instruction could be used. + + return (uint)count; + + /* original routine in C-language. please notice the C-version has differently + organized coefficients though. + double suml1, suml2; + double sumr1, sumr2; + uint i, j; + + for (j = 0; j < count; j += 2) + { + const float *ptr; + const float *pFil; + + suml1 = sumr1 = 0.0; + suml2 = sumr2 = 0.0; + ptr = src; + pFil = filterCoeffs; + for (i = 0; i < lengthLocal; i ++) + { + // unroll loop for efficiency. + + suml1 += ptr[0] * pFil[0] + + ptr[2] * pFil[2] + + ptr[4] * pFil[4] + + ptr[6] * pFil[6]; + + sumr1 += ptr[1] * pFil[1] + + ptr[3] * pFil[3] + + ptr[5] * pFil[5] + + ptr[7] * pFil[7]; + + suml2 += ptr[8] * pFil[0] + + ptr[10] * pFil[2] + + ptr[12] * pFil[4] + + ptr[14] * pFil[6]; + + sumr2 += ptr[9] * pFil[1] + + ptr[11] * pFil[3] + + ptr[13] * pFil[5] + + ptr[15] * pFil[7]; + + ptr += 16; + pFil += 8; + } + dest[0] = (float)suml1; + dest[1] = (float)sumr1; + dest[2] = (float)suml2; + dest[3] = (float)sumr2; + + src += 4; + dest += 4; + } + */ +} + +#endif // SOUNDTOUCH_ALLOW_SSE |