Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 923 insertions, 0 deletions

diff --git a/third_party/libwebrtc/common_audio/resampler/resampler.cc b/third_party/libwebrtc/common_audio/resampler/resampler.cc
new file mode 100644
index 0000000000..0fdb249052
--- /dev/null
+++ b/third_party/libwebrtc/common_audio/resampler/resampler.cc
@@ -0,0 +1,923 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+/*
+ * A wrapper for resampling a numerous amount of sampling combinations.
+ */
+
+#include "common_audio/resampler/include/resampler.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common_audio/signal_processing/include/signal_processing_library.h"
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+
+Resampler::Resampler()
+    : state1_(nullptr),
+      state2_(nullptr),
+      state3_(nullptr),
+      in_buffer_(nullptr),
+      out_buffer_(nullptr),
+      in_buffer_size_(0),
+      out_buffer_size_(0),
+      in_buffer_size_max_(0),
+      out_buffer_size_max_(0),
+      my_in_frequency_khz_(0),
+      my_out_frequency_khz_(0),
+      my_mode_(kResamplerMode1To1),
+      num_channels_(0),
+      helper_left_(nullptr),
+      helper_right_(nullptr) {}
+
+Resampler::Resampler(int inFreq, int outFreq, size_t num_channels)
+    : Resampler() {
+  Reset(inFreq, outFreq, num_channels);
+}
+
+Resampler::~Resampler() {
+  if (state1_) {
+    free(state1_);
+  }
+  if (state2_) {
+    free(state2_);
+  }
+  if (state3_) {
+    free(state3_);
+  }
+  if (in_buffer_) {
+    free(in_buffer_);
+  }
+  if (out_buffer_) {
+    free(out_buffer_);
+  }
+  if (helper_left_) {
+    delete helper_left_;
+  }
+  if (helper_right_) {
+    delete helper_right_;
+  }
+}
+
+int Resampler::ResetIfNeeded(int inFreq, int outFreq, size_t num_channels) {
+  int tmpInFreq_kHz = inFreq / 1000;
+  int tmpOutFreq_kHz = outFreq / 1000;
+
+  if ((tmpInFreq_kHz != my_in_frequency_khz_) ||
+      (tmpOutFreq_kHz != my_out_frequency_khz_) ||
+      (num_channels != num_channels_)) {
+    return Reset(inFreq, outFreq, num_channels);
+  } else {
+    return 0;
+  }
+}
+
+int Resampler::Reset(int inFreq, int outFreq, size_t num_channels) {
+  if (num_channels != 1 && num_channels != 2) {
+    RTC_LOG(LS_WARNING)
+        << "Reset() called with unsupported channel count, num_channels = "
+        << num_channels;
+    return -1;
+  }
+  ResamplerMode mode;
+  if (ComputeResamplerMode(inFreq, outFreq, &mode) != 0) {
+    RTC_LOG(LS_WARNING)
+        << "Reset() called with unsupported sample rates, inFreq = " << inFreq
+        << ", outFreq = " << outFreq;
+    return -1;
+  }
+  // Reinitialize internal state for the frequencies and sample rates.
+  num_channels_ = num_channels;
+  my_mode_ = mode;
+
+  if (state1_) {
+    free(state1_);
+    state1_ = nullptr;
+  }
+  if (state2_) {
+    free(state2_);
+    state2_ = nullptr;
+  }
+  if (state3_) {
+    free(state3_);
+    state3_ = nullptr;
+  }
+  if (in_buffer_) {
+    free(in_buffer_);
+    in_buffer_ = nullptr;
+  }
+  if (out_buffer_) {
+    free(out_buffer_);
+    out_buffer_ = nullptr;
+  }
+  if (helper_left_) {
+    delete helper_left_;
+    helper_left_ = nullptr;
+  }
+  if (helper_right_) {
+    delete helper_right_;
+    helper_right_ = nullptr;
+  }
+
+  in_buffer_size_ = 0;
+  out_buffer_size_ = 0;
+  in_buffer_size_max_ = 0;
+  out_buffer_size_max_ = 0;
+
+  // We need to track what domain we're in.
+  my_in_frequency_khz_ = inFreq / 1000;
+  my_out_frequency_khz_ = outFreq / 1000;
+
+  if (num_channels_ == 2) {
+    // Create two mono resamplers.
+    helper_left_ = new Resampler(inFreq, outFreq, 1);
+    helper_right_ = new Resampler(inFreq, outFreq, 1);
+  }
+
+  // Now create the states we need.
+  switch (my_mode_) {
+    case kResamplerMode1To1:
+      // No state needed;
+      break;
+    case kResamplerMode1To2:
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode1To3:
+      state1_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
+      WebRtcSpl_ResetResample16khzTo48khz(
+          static_cast<WebRtcSpl_State16khzTo48khz*>(state1_));
+      break;
+    case kResamplerMode1To4:
+      // 1:2
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      // 2:4
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode1To6:
+      // 1:2
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      // 2:6
+      state2_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
+      WebRtcSpl_ResetResample16khzTo48khz(
+          static_cast<WebRtcSpl_State16khzTo48khz*>(state2_));
+      break;
+    case kResamplerMode1To12:
+      // 1:2
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      // 2:4
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+      // 4:12
+      state3_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
+      WebRtcSpl_ResetResample16khzTo48khz(
+          static_cast<WebRtcSpl_State16khzTo48khz*>(state3_));
+      break;
+    case kResamplerMode2To3:
+      // 2:6
+      state1_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
+      WebRtcSpl_ResetResample16khzTo48khz(
+          static_cast<WebRtcSpl_State16khzTo48khz*>(state1_));
+      // 6:3
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode2To11:
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+
+      state2_ = malloc(sizeof(WebRtcSpl_State8khzTo22khz));
+      WebRtcSpl_ResetResample8khzTo22khz(
+          static_cast<WebRtcSpl_State8khzTo22khz*>(state2_));
+      break;
+    case kResamplerMode4To11:
+      state1_ = malloc(sizeof(WebRtcSpl_State8khzTo22khz));
+      WebRtcSpl_ResetResample8khzTo22khz(
+          static_cast<WebRtcSpl_State8khzTo22khz*>(state1_));
+      break;
+    case kResamplerMode8To11:
+      state1_ = malloc(sizeof(WebRtcSpl_State16khzTo22khz));
+      WebRtcSpl_ResetResample16khzTo22khz(
+          static_cast<WebRtcSpl_State16khzTo22khz*>(state1_));
+      break;
+    case kResamplerMode11To16:
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+
+      state2_ = malloc(sizeof(WebRtcSpl_State22khzTo16khz));
+      WebRtcSpl_ResetResample22khzTo16khz(
+          static_cast<WebRtcSpl_State22khzTo16khz*>(state2_));
+      break;
+    case kResamplerMode11To32:
+      // 11 -> 22
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+
+      // 22 -> 16
+      state2_ = malloc(sizeof(WebRtcSpl_State22khzTo16khz));
+      WebRtcSpl_ResetResample22khzTo16khz(
+          static_cast<WebRtcSpl_State22khzTo16khz*>(state2_));
+
+      // 16 -> 32
+      state3_ = malloc(8 * sizeof(int32_t));
+      memset(state3_, 0, 8 * sizeof(int32_t));
+
+      break;
+    case kResamplerMode2To1:
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode3To1:
+      state1_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
+      WebRtcSpl_ResetResample48khzTo16khz(
+          static_cast<WebRtcSpl_State48khzTo16khz*>(state1_));
+      break;
+    case kResamplerMode4To1:
+      // 4:2
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      // 2:1
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode6To1:
+      // 6:2
+      state1_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
+      WebRtcSpl_ResetResample48khzTo16khz(
+          static_cast<WebRtcSpl_State48khzTo16khz*>(state1_));
+      // 2:1
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode12To1:
+      // 12:4
+      state1_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
+      WebRtcSpl_ResetResample48khzTo16khz(
+          static_cast<WebRtcSpl_State48khzTo16khz*>(state1_));
+      // 4:2
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+      // 2:1
+      state3_ = malloc(8 * sizeof(int32_t));
+      memset(state3_, 0, 8 * sizeof(int32_t));
+      break;
+    case kResamplerMode3To2:
+      // 3:6
+      state1_ = malloc(8 * sizeof(int32_t));
+      memset(state1_, 0, 8 * sizeof(int32_t));
+      // 6:2
+      state2_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
+      WebRtcSpl_ResetResample48khzTo16khz(
+          static_cast<WebRtcSpl_State48khzTo16khz*>(state2_));
+      break;
+    case kResamplerMode11To2:
+      state1_ = malloc(sizeof(WebRtcSpl_State22khzTo8khz));
+      WebRtcSpl_ResetResample22khzTo8khz(
+          static_cast<WebRtcSpl_State22khzTo8khz*>(state1_));
+
+      state2_ = malloc(8 * sizeof(int32_t));
+      memset(state2_, 0, 8 * sizeof(int32_t));
+
+      break;
+    case kResamplerMode11To4:
+      state1_ = malloc(sizeof(WebRtcSpl_State22khzTo8khz));
+      WebRtcSpl_ResetResample22khzTo8khz(
+          static_cast<WebRtcSpl_State22khzTo8khz*>(state1_));
+      break;
+    case kResamplerMode11To8:
+      state1_ = malloc(sizeof(WebRtcSpl_State22khzTo16khz));
+      WebRtcSpl_ResetResample22khzTo16khz(
+          static_cast<WebRtcSpl_State22khzTo16khz*>(state1_));
+      break;
+  }
+
+  return 0;
+}
+
+int Resampler::ComputeResamplerMode(int in_freq_hz,
+                                    int out_freq_hz,
+                                    ResamplerMode* mode) {
+  // Start with a math exercise, Euclid's algorithm to find the gcd:
+  int a = in_freq_hz;
+  int b = out_freq_hz;
+  int c = a % b;
+  while (c != 0) {
+    a = b;
+    b = c;
+    c = a % b;
+  }
+  // b is now the gcd;
+
+  // Scale with GCD
+  const int reduced_in_freq = in_freq_hz / b;
+  const int reduced_out_freq = out_freq_hz / b;
+
+  if (reduced_in_freq == reduced_out_freq) {
+    *mode = kResamplerMode1To1;
+  } else if (reduced_in_freq == 1) {
+    switch (reduced_out_freq) {
+      case 2:
+        *mode = kResamplerMode1To2;
+        break;
+      case 3:
+        *mode = kResamplerMode1To3;
+        break;
+      case 4:
+        *mode = kResamplerMode1To4;
+        break;
+      case 6:
+        *mode = kResamplerMode1To6;
+        break;
+      case 12:
+        *mode = kResamplerMode1To12;
+        break;
+      default:
+        return -1;
+    }
+  } else if (reduced_out_freq == 1) {
+    switch (reduced_in_freq) {
+      case 2:
+        *mode = kResamplerMode2To1;
+        break;
+      case 3:
+        *mode = kResamplerMode3To1;
+        break;
+      case 4:
+        *mode = kResamplerMode4To1;
+        break;
+      case 6:
+        *mode = kResamplerMode6To1;
+        break;
+      case 12:
+        *mode = kResamplerMode12To1;
+        break;
+      default:
+        return -1;
+    }
+  } else if ((reduced_in_freq == 2) && (reduced_out_freq == 3)) {
+    *mode = kResamplerMode2To3;
+  } else if ((reduced_in_freq == 2) && (reduced_out_freq == 11)) {
+    *mode = kResamplerMode2To11;
+  } else if ((reduced_in_freq == 4) && (reduced_out_freq == 11)) {
+    *mode = kResamplerMode4To11;
+  } else if ((reduced_in_freq == 8) && (reduced_out_freq == 11)) {
+    *mode = kResamplerMode8To11;
+  } else if ((reduced_in_freq == 3) && (reduced_out_freq == 2)) {
+    *mode = kResamplerMode3To2;
+  } else if ((reduced_in_freq == 11) && (reduced_out_freq == 2)) {
+    *mode = kResamplerMode11To2;
+  } else if ((reduced_in_freq == 11) && (reduced_out_freq == 4)) {
+    *mode = kResamplerMode11To4;
+  } else if ((reduced_in_freq == 11) && (reduced_out_freq == 16)) {
+    *mode = kResamplerMode11To16;
+  } else if ((reduced_in_freq == 11) && (reduced_out_freq == 32)) {
+    *mode = kResamplerMode11To32;
+  } else if ((reduced_in_freq == 11) && (reduced_out_freq == 8)) {
+    *mode = kResamplerMode11To8;
+  } else {
+    return -1;
+  }
+  return 0;
+}
+
+// Synchronous resampling, all output samples are written to samplesOut
+int Resampler::Push(const int16_t* samplesIn,
+                    size_t lengthIn,
+                    int16_t* samplesOut,
+                    size_t maxLen,
+                    size_t& outLen) {
+  if (num_channels_ == 2) {
+    // Split up the signal and call the helper object for each channel
+    int16_t* left =
+        static_cast<int16_t*>(malloc(lengthIn * sizeof(int16_t) / 2));
+    int16_t* right =
+        static_cast<int16_t*>(malloc(lengthIn * sizeof(int16_t) / 2));
+    int16_t* out_left =
+        static_cast<int16_t*>(malloc(maxLen / 2 * sizeof(int16_t)));
+    int16_t* out_right =
+        static_cast<int16_t*>(malloc(maxLen / 2 * sizeof(int16_t)));
+    int res = 0;
+    for (size_t i = 0; i < lengthIn; i += 2) {
+      left[i >> 1] = samplesIn[i];
+      right[i >> 1] = samplesIn[i + 1];
+    }
+
+    // It's OK to overwrite the local parameter, since it's just a copy
+    lengthIn = lengthIn / 2;
+
+    size_t actualOutLen_left = 0;
+    size_t actualOutLen_right = 0;
+    // Do resampling for right channel
+    res |= helper_left_->Push(left, lengthIn, out_left, maxLen / 2,
+                              actualOutLen_left);
+    res |= helper_right_->Push(right, lengthIn, out_right, maxLen / 2,
+                               actualOutLen_right);
+    if (res || (actualOutLen_left != actualOutLen_right)) {
+      free(left);
+      free(right);
+      free(out_left);
+      free(out_right);
+      return -1;
+    }
+
+    // Reassemble the signal
+    for (size_t i = 0; i < actualOutLen_left; i++) {
+      samplesOut[i * 2] = out_left[i];
+      samplesOut[i * 2 + 1] = out_right[i];
+    }
+    outLen = 2 * actualOutLen_left;
+
+    free(left);
+    free(right);
+    free(out_left);
+    free(out_right);
+
+    return 0;
+  }
+
+  // Containers for temp samples
+  int16_t* tmp;
+  int16_t* tmp_2;
+  // tmp data for resampling routines
+  int32_t* tmp_mem;
+
+  switch (my_mode_) {
+    case kResamplerMode1To1:
+      memcpy(samplesOut, samplesIn, lengthIn * sizeof(int16_t));
+      outLen = lengthIn;
+      break;
+    case kResamplerMode1To2:
+      if (maxLen < (lengthIn * 2)) {
+        return -1;
+      }
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, samplesOut,
+                            static_cast<int32_t*>(state1_));
+      outLen = lengthIn * 2;
+      return 0;
+    case kResamplerMode1To3:
+
+      // We can only handle blocks of 160 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 160) != 0) {
+        return -1;
+      }
+      if (maxLen < (lengthIn * 3)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(336 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 160) {
+        WebRtcSpl_Resample16khzTo48khz(
+            samplesIn + i, samplesOut + i * 3,
+            static_cast<WebRtcSpl_State16khzTo48khz*>(state1_), tmp_mem);
+      }
+      outLen = lengthIn * 3;
+      free(tmp_mem);
+      return 0;
+    case kResamplerMode1To4:
+      if (maxLen < (lengthIn * 4)) {
+        return -1;
+      }
+
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * 2 * lengthIn));
+      // 1:2
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp,
+                            static_cast<int32_t*>(state1_));
+      // 2:4
+      WebRtcSpl_UpsampleBy2(tmp, lengthIn * 2, samplesOut,
+                            static_cast<int32_t*>(state2_));
+      outLen = lengthIn * 4;
+      free(tmp);
+      return 0;
+    case kResamplerMode1To6:
+      // We can only handle blocks of 80 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 80) != 0) {
+        return -1;
+      }
+      if (maxLen < (lengthIn * 6)) {
+        return -1;
+      }
+
+      // 1:2
+
+      tmp_mem = static_cast<int32_t*>(malloc(336 * sizeof(int32_t)));
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * 2 * lengthIn));
+
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp,
+                            static_cast<int32_t*>(state1_));
+      outLen = lengthIn * 2;
+
+      for (size_t i = 0; i < outLen; i += 160) {
+        WebRtcSpl_Resample16khzTo48khz(
+            tmp + i, samplesOut + i * 3,
+            static_cast<WebRtcSpl_State16khzTo48khz*>(state2_), tmp_mem);
+      }
+      outLen = outLen * 3;
+      free(tmp_mem);
+      free(tmp);
+
+      return 0;
+    case kResamplerMode1To12:
+      // We can only handle blocks of 40 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 40) != 0) {
+        return -1;
+      }
+      if (maxLen < (lengthIn * 12)) {
+        return -1;
+      }
+
+      tmp_mem = static_cast<int32_t*>(malloc(336 * sizeof(int32_t)));
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * 4 * lengthIn));
+      // 1:2
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, samplesOut,
+                            static_cast<int32_t*>(state1_));
+      outLen = lengthIn * 2;
+      // 2:4
+      WebRtcSpl_UpsampleBy2(samplesOut, outLen, tmp,
+                            static_cast<int32_t*>(state2_));
+      outLen = outLen * 2;
+      // 4:12
+      for (size_t i = 0; i < outLen; i += 160) {
+        // WebRtcSpl_Resample16khzTo48khz() takes a block of 160 samples
+        // as input and outputs a resampled block of 480 samples. The
+        // data is now actually in 32 kHz sampling rate, despite the
+        // function name, and with a resampling factor of three becomes
+        // 96 kHz.
+        WebRtcSpl_Resample16khzTo48khz(
+            tmp + i, samplesOut + i * 3,
+            static_cast<WebRtcSpl_State16khzTo48khz*>(state3_), tmp_mem);
+      }
+      outLen = outLen * 3;
+      free(tmp_mem);
+      free(tmp);
+
+      return 0;
+    case kResamplerMode2To3:
+      if (maxLen < (lengthIn * 3 / 2)) {
+        return -1;
+      }
+      // 2:6
+      // We can only handle blocks of 160 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 160) != 0) {
+        return -1;
+      }
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * lengthIn * 3));
+      tmp_mem = static_cast<int32_t*>(malloc(336 * sizeof(int32_t)));
+      for (size_t i = 0; i < lengthIn; i += 160) {
+        WebRtcSpl_Resample16khzTo48khz(
+            samplesIn + i, tmp + i * 3,
+            static_cast<WebRtcSpl_State16khzTo48khz*>(state1_), tmp_mem);
+      }
+      lengthIn = lengthIn * 3;
+      // 6:3
+      WebRtcSpl_DownsampleBy2(tmp, lengthIn, samplesOut,
+                              static_cast<int32_t*>(state2_));
+      outLen = lengthIn / 2;
+      free(tmp);
+      free(tmp_mem);
+      return 0;
+    case kResamplerMode2To11:
+
+      // We can only handle blocks of 80 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 80) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 11) / 2)) {
+        return -1;
+      }
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * 2 * lengthIn));
+      // 1:2
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp,
+                            static_cast<int32_t*>(state1_));
+      lengthIn *= 2;
+
+      tmp_mem = static_cast<int32_t*>(malloc(98 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 80) {
+        WebRtcSpl_Resample8khzTo22khz(
+            tmp + i, samplesOut + (i * 11) / 4,
+            static_cast<WebRtcSpl_State8khzTo22khz*>(state2_), tmp_mem);
+      }
+      outLen = (lengthIn * 11) / 4;
+      free(tmp_mem);
+      free(tmp);
+      return 0;
+    case kResamplerMode4To11:
+
+      // We can only handle blocks of 80 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 80) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 11) / 4)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(98 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 80) {
+        WebRtcSpl_Resample8khzTo22khz(
+            samplesIn + i, samplesOut + (i * 11) / 4,
+            static_cast<WebRtcSpl_State8khzTo22khz*>(state1_), tmp_mem);
+      }
+      outLen = (lengthIn * 11) / 4;
+      free(tmp_mem);
+      return 0;
+    case kResamplerMode8To11:
+      // We can only handle blocks of 160 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 160) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 11) / 8)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(88 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 160) {
+        WebRtcSpl_Resample16khzTo22khz(
+            samplesIn + i, samplesOut + (i * 11) / 8,
+            static_cast<WebRtcSpl_State16khzTo22khz*>(state1_), tmp_mem);
+      }
+      outLen = (lengthIn * 11) / 8;
+      free(tmp_mem);
+      return 0;
+
+    case kResamplerMode11To16:
+      // We can only handle blocks of 110 samples
+      if ((lengthIn % 110) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 16) / 11)) {
+        return -1;
+      }
+
+      tmp_mem = static_cast<int32_t*>(malloc(104 * sizeof(int32_t)));
+      tmp = static_cast<int16_t*>(malloc((sizeof(int16_t) * lengthIn * 2)));
+
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp,
+                            static_cast<int32_t*>(state1_));
+
+      for (size_t i = 0; i < (lengthIn * 2); i += 220) {
+        WebRtcSpl_Resample22khzTo16khz(
+            tmp + i, samplesOut + (i / 220) * 160,
+            static_cast<WebRtcSpl_State22khzTo16khz*>(state2_), tmp_mem);
+      }
+
+      outLen = (lengthIn * 16) / 11;
+
+      free(tmp_mem);
+      free(tmp);
+      return 0;
+
+    case kResamplerMode11To32:
+
+      // We can only handle blocks of 110 samples
+      if ((lengthIn % 110) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 32) / 11)) {
+        return -1;
+      }
+
+      tmp_mem = static_cast<int32_t*>(malloc(104 * sizeof(int32_t)));
+      tmp = static_cast<int16_t*>(malloc((sizeof(int16_t) * lengthIn * 2)));
+
+      // 11 -> 22 kHz in samplesOut
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, samplesOut,
+                            static_cast<int32_t*>(state1_));
+
+      // 22 -> 16 in tmp
+      for (size_t i = 0; i < (lengthIn * 2); i += 220) {
+        WebRtcSpl_Resample22khzTo16khz(
+            samplesOut + i, tmp + (i / 220) * 160,
+            static_cast<WebRtcSpl_State22khzTo16khz*>(state2_), tmp_mem);
+      }
+
+      // 16 -> 32 in samplesOut
+      WebRtcSpl_UpsampleBy2(tmp, (lengthIn * 16) / 11, samplesOut,
+                            static_cast<int32_t*>(state3_));
+
+      outLen = (lengthIn * 32) / 11;
+
+      free(tmp_mem);
+      free(tmp);
+      return 0;
+
+    case kResamplerMode2To1:
+      if (maxLen < (lengthIn / 2)) {
+        return -1;
+      }
+      WebRtcSpl_DownsampleBy2(samplesIn, lengthIn, samplesOut,
+                              static_cast<int32_t*>(state1_));
+      outLen = lengthIn / 2;
+      return 0;
+    case kResamplerMode3To1:
+      // We can only handle blocks of 480 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 480) != 0) {
+        return -1;
+      }
+      if (maxLen < (lengthIn / 3)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(496 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 480) {
+        WebRtcSpl_Resample48khzTo16khz(
+            samplesIn + i, samplesOut + i / 3,
+            static_cast<WebRtcSpl_State48khzTo16khz*>(state1_), tmp_mem);
+      }
+      outLen = lengthIn / 3;
+      free(tmp_mem);
+      return 0;
+    case kResamplerMode4To1:
+      if (maxLen < (lengthIn / 4)) {
+        return -1;
+      }
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * lengthIn / 2));
+      // 4:2
+      WebRtcSpl_DownsampleBy2(samplesIn, lengthIn, tmp,
+                              static_cast<int32_t*>(state1_));
+      // 2:1
+      WebRtcSpl_DownsampleBy2(tmp, lengthIn / 2, samplesOut,
+                              static_cast<int32_t*>(state2_));
+      outLen = lengthIn / 4;
+      free(tmp);
+      return 0;
+
+    case kResamplerMode6To1:
+      // We can only handle blocks of 480 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 480) != 0) {
+        return -1;
+      }
+      if (maxLen < (lengthIn / 6)) {
+        return -1;
+      }
+
+      tmp_mem = static_cast<int32_t*>(malloc(496 * sizeof(int32_t)));
+      tmp = static_cast<int16_t*>(malloc((sizeof(int16_t) * lengthIn) / 3));
+
+      for (size_t i = 0; i < lengthIn; i += 480) {
+        WebRtcSpl_Resample48khzTo16khz(
+            samplesIn + i, tmp + i / 3,
+            static_cast<WebRtcSpl_State48khzTo16khz*>(state1_), tmp_mem);
+      }
+      outLen = lengthIn / 3;
+      free(tmp_mem);
+      WebRtcSpl_DownsampleBy2(tmp, outLen, samplesOut,
+                              static_cast<int32_t*>(state2_));
+      free(tmp);
+      outLen = outLen / 2;
+      return 0;
+    case kResamplerMode12To1:
+      // We can only handle blocks of 480 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 480) != 0) {
+        return -1;
+      }
+      if (maxLen < (lengthIn / 12)) {
+        return -1;
+      }
+
+      tmp_mem = static_cast<int32_t*>(malloc(496 * sizeof(int32_t)));
+      tmp = static_cast<int16_t*>(malloc((sizeof(int16_t) * lengthIn) / 3));
+      tmp_2 = static_cast<int16_t*>(malloc((sizeof(int16_t) * lengthIn) / 6));
+      // 12:4
+      for (size_t i = 0; i < lengthIn; i += 480) {
+        // WebRtcSpl_Resample48khzTo16khz() takes a block of 480 samples
+        // as input and outputs a resampled block of 160 samples. The
+        // data is now actually in 96 kHz sampling rate, despite the
+        // function name, and with a resampling factor of 1/3 becomes
+        // 32 kHz.
+        WebRtcSpl_Resample48khzTo16khz(
+            samplesIn + i, tmp + i / 3,
+            static_cast<WebRtcSpl_State48khzTo16khz*>(state1_), tmp_mem);
+      }
+      outLen = lengthIn / 3;
+      free(tmp_mem);
+      // 4:2
+      WebRtcSpl_DownsampleBy2(tmp, outLen, tmp_2,
+                              static_cast<int32_t*>(state2_));
+      outLen = outLen / 2;
+      free(tmp);
+      // 2:1
+      WebRtcSpl_DownsampleBy2(tmp_2, outLen, samplesOut,
+                              static_cast<int32_t*>(state3_));
+      free(tmp_2);
+      outLen = outLen / 2;
+      return 0;
+    case kResamplerMode3To2:
+      if (maxLen < (lengthIn * 2 / 3)) {
+        return -1;
+      }
+      // 3:6
+      tmp = static_cast<int16_t*>(malloc(sizeof(int16_t) * lengthIn * 2));
+      WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp,
+                            static_cast<int32_t*>(state1_));
+      lengthIn *= 2;
+      // 6:2
+      // We can only handle blocks of 480 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 480) != 0) {
+        free(tmp);
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(496 * sizeof(int32_t)));
+      for (size_t i = 0; i < lengthIn; i += 480) {
+        WebRtcSpl_Resample48khzTo16khz(
+            tmp + i, samplesOut + i / 3,
+            static_cast<WebRtcSpl_State48khzTo16khz*>(state2_), tmp_mem);
+      }
+      outLen = lengthIn / 3;
+      free(tmp);
+      free(tmp_mem);
+      return 0;
+    case kResamplerMode11To2:
+      // We can only handle blocks of 220 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 220) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 2) / 11)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(126 * sizeof(int32_t)));
+      tmp =
+          static_cast<int16_t*>(malloc((lengthIn * 4) / 11 * sizeof(int16_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 220) {
+        WebRtcSpl_Resample22khzTo8khz(
+            samplesIn + i, tmp + (i * 4) / 11,
+            static_cast<WebRtcSpl_State22khzTo8khz*>(state1_), tmp_mem);
+      }
+      lengthIn = (lengthIn * 4) / 11;
+
+      WebRtcSpl_DownsampleBy2(tmp, lengthIn, samplesOut,
+                              static_cast<int32_t*>(state2_));
+      outLen = lengthIn / 2;
+
+      free(tmp_mem);
+      free(tmp);
+      return 0;
+    case kResamplerMode11To4:
+      // We can only handle blocks of 220 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 220) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 4) / 11)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(126 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 220) {
+        WebRtcSpl_Resample22khzTo8khz(
+            samplesIn + i, samplesOut + (i * 4) / 11,
+            static_cast<WebRtcSpl_State22khzTo8khz*>(state1_), tmp_mem);
+      }
+      outLen = (lengthIn * 4) / 11;
+      free(tmp_mem);
+      return 0;
+    case kResamplerMode11To8:
+      // We can only handle blocks of 160 samples
+      // Can be fixed, but I don't think it's needed
+      if ((lengthIn % 220) != 0) {
+        return -1;
+      }
+      if (maxLen < ((lengthIn * 8) / 11)) {
+        return -1;
+      }
+      tmp_mem = static_cast<int32_t*>(malloc(104 * sizeof(int32_t)));
+
+      for (size_t i = 0; i < lengthIn; i += 220) {
+        WebRtcSpl_Resample22khzTo16khz(
+            samplesIn + i, samplesOut + (i * 8) / 11,
+            static_cast<WebRtcSpl_State22khzTo16khz*>(state1_), tmp_mem);
+      }
+      outLen = (lengthIn * 8) / 11;
+      free(tmp_mem);
+      return 0;
+  }
+  return 0;
+}
+
+}  // namespace webrtc