diff options
Diffstat (limited to 'third_party/libwebrtc/modules/audio_coding/codecs/pcm16b')
8 files changed, 353 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc new file mode 100644 index 0000000000..7761efe8b3 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2015 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. + */ + +#include "modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h" + +#include <utility> + +#include "modules/audio_coding/codecs/legacy_encoded_audio_frame.h" +#include "modules/audio_coding/codecs/pcm16b/pcm16b.h" +#include "rtc_base/checks.h" + +namespace webrtc { + +AudioDecoderPcm16B::AudioDecoderPcm16B(int sample_rate_hz, size_t num_channels) + : sample_rate_hz_(sample_rate_hz), num_channels_(num_channels) { + RTC_DCHECK(sample_rate_hz == 8000 || sample_rate_hz == 16000 || + sample_rate_hz == 32000 || sample_rate_hz == 48000) + << "Unsupported sample rate " << sample_rate_hz; + RTC_DCHECK_GE(num_channels, 1); +} + +void AudioDecoderPcm16B::Reset() {} + +int AudioDecoderPcm16B::SampleRateHz() const { + return sample_rate_hz_; +} + +size_t AudioDecoderPcm16B::Channels() const { + return num_channels_; +} + +int AudioDecoderPcm16B::DecodeInternal(const uint8_t* encoded, + size_t encoded_len, + int sample_rate_hz, + int16_t* decoded, + SpeechType* speech_type) { + RTC_DCHECK_EQ(sample_rate_hz_, sample_rate_hz); + // Adjust the encoded length down to ensure the same number of samples in each + // channel. + const size_t encoded_len_adjusted = + PacketDuration(encoded, encoded_len) * 2 * + Channels(); // 2 bytes per sample per channel + size_t ret = WebRtcPcm16b_Decode(encoded, encoded_len_adjusted, decoded); + *speech_type = ConvertSpeechType(1); + return static_cast<int>(ret); +} + +std::vector<AudioDecoder::ParseResult> AudioDecoderPcm16B::ParsePayload( + rtc::Buffer&& payload, + uint32_t timestamp) { + const int samples_per_ms = rtc::CheckedDivExact(sample_rate_hz_, 1000); + return LegacyEncodedAudioFrame::SplitBySamples( + this, std::move(payload), timestamp, samples_per_ms * 2 * num_channels_, + samples_per_ms); +} + +int AudioDecoderPcm16B::PacketDuration(const uint8_t* encoded, + size_t encoded_len) const { + // Two encoded byte per sample per channel. + return static_cast<int>(encoded_len / (2 * Channels())); +} + +} // namespace webrtc diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h new file mode 100644 index 0000000000..6f50161d3f --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2015 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. + */ + +#ifndef MODULES_AUDIO_CODING_CODECS_PCM16B_AUDIO_DECODER_PCM16B_H_ +#define MODULES_AUDIO_CODING_CODECS_PCM16B_AUDIO_DECODER_PCM16B_H_ + +#include <stddef.h> +#include <stdint.h> + +#include <vector> + +#include "api/audio_codecs/audio_decoder.h" +#include "rtc_base/buffer.h" + +namespace webrtc { + +class AudioDecoderPcm16B final : public AudioDecoder { + public: + AudioDecoderPcm16B(int sample_rate_hz, size_t num_channels); + + AudioDecoderPcm16B(const AudioDecoderPcm16B&) = delete; + AudioDecoderPcm16B& operator=(const AudioDecoderPcm16B&) = delete; + + void Reset() override; + std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload, + uint32_t timestamp) override; + int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; + int SampleRateHz() const override; + size_t Channels() const override; + + protected: + int DecodeInternal(const uint8_t* encoded, + size_t encoded_len, + int sample_rate_hz, + int16_t* decoded, + SpeechType* speech_type) override; + + private: + const int sample_rate_hz_; + const size_t num_channels_; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_CODING_CODECS_PCM16B_AUDIO_DECODER_PCM16B_H_ diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc new file mode 100644 index 0000000000..9445b1ee3e --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2014 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. + */ + +#include "modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h" + +#include "modules/audio_coding/codecs/pcm16b/pcm16b.h" +#include "rtc_base/checks.h" + +namespace webrtc { + +size_t AudioEncoderPcm16B::EncodeCall(const int16_t* audio, + size_t input_len, + uint8_t* encoded) { + return WebRtcPcm16b_Encode(audio, input_len, encoded); +} + +size_t AudioEncoderPcm16B::BytesPerSample() const { + return 2; +} + +AudioEncoder::CodecType AudioEncoderPcm16B::GetCodecType() const { + return CodecType::kOther; +} + +bool AudioEncoderPcm16B::Config::IsOk() const { + if ((sample_rate_hz != 8000) && (sample_rate_hz != 16000) && + (sample_rate_hz != 32000) && (sample_rate_hz != 48000)) + return false; + return AudioEncoderPcm::Config::IsOk(); +} + +} // namespace webrtc diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h new file mode 100644 index 0000000000..c363b40b3f --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2014 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. + */ + +#ifndef MODULES_AUDIO_CODING_CODECS_PCM16B_AUDIO_ENCODER_PCM16B_H_ +#define MODULES_AUDIO_CODING_CODECS_PCM16B_AUDIO_ENCODER_PCM16B_H_ + +#include "modules/audio_coding/codecs/g711/audio_encoder_pcm.h" + +namespace webrtc { + +class AudioEncoderPcm16B final : public AudioEncoderPcm { + public: + struct Config : public AudioEncoderPcm::Config { + public: + Config() : AudioEncoderPcm::Config(107), sample_rate_hz(8000) {} + bool IsOk() const; + + int sample_rate_hz; + }; + + explicit AudioEncoderPcm16B(const Config& config) + : AudioEncoderPcm(config, config.sample_rate_hz) {} + + AudioEncoderPcm16B(const AudioEncoderPcm16B&) = delete; + AudioEncoderPcm16B& operator=(const AudioEncoderPcm16B&) = delete; + + protected: + size_t EncodeCall(const int16_t* audio, + size_t input_len, + uint8_t* encoded) override; + + size_t BytesPerSample() const override; + + AudioEncoder::CodecType GetCodecType() const override; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_CODING_CODECS_PCM16B_AUDIO_ENCODER_PCM16B_H_ diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b.c b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b.c new file mode 100644 index 0000000000..2f6dce5f41 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b.c @@ -0,0 +1,32 @@ +/* + * 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. + */ + +#include "modules/audio_coding/codecs/pcm16b/pcm16b.h" + +size_t WebRtcPcm16b_Encode(const int16_t* speech, + size_t len, + uint8_t* encoded) { + size_t i; + for (i = 0; i < len; ++i) { + uint16_t s = speech[i]; + encoded[2 * i] = s >> 8; + encoded[2 * i + 1] = s; + } + return 2 * len; +} + +size_t WebRtcPcm16b_Decode(const uint8_t* encoded, + size_t len, + int16_t* speech) { + size_t i; + for (i = 0; i < len / 2; ++i) + speech[i] = encoded[2 * i] << 8 | encoded[2 * i + 1]; + return len / 2; +} diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h new file mode 100644 index 0000000000..75d1efda3b --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h @@ -0,0 +1,63 @@ +/* + * 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. + */ + +#ifndef MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_H_ +#define MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_H_ +/* + * Define the fixpoint numeric formats + */ + +#include <stddef.h> +#include <stdint.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/**************************************************************************** + * WebRtcPcm16b_Encode(...) + * + * "Encode" a sample vector to 16 bit linear (Encoded standard is big endian) + * + * Input: + * - speech : Input speech vector + * - len : Number of samples in speech vector + * + * Output: + * - encoded : Encoded data vector (big endian 16 bit) + * + * Returned value : Length (in bytes) of coded data. + * Always equal to twice the len input parameter. + */ + +size_t WebRtcPcm16b_Encode(const int16_t* speech, size_t len, uint8_t* encoded); + +/**************************************************************************** + * WebRtcPcm16b_Decode(...) + * + * "Decode" a vector to 16 bit linear (Encoded standard is big endian) + * + * Input: + * - encoded : Encoded data vector (big endian 16 bit) + * - len : Number of bytes in encoded + * + * Output: + * - speech : Decoded speech vector + * + * Returned value : Samples in speech + */ + +size_t WebRtcPcm16b_Decode(const uint8_t* encoded, size_t len, int16_t* speech); + +#ifdef __cplusplus +} +#endif + +#endif /* MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_H_ */ diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b_common.cc b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b_common.cc new file mode 100644 index 0000000000..ecf91b45ac --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b_common.cc @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2017 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. + */ + +#include "modules/audio_coding/codecs/pcm16b/pcm16b_common.h" + +#include <stdint.h> + +#include <initializer_list> + +namespace webrtc { + +void Pcm16BAppendSupportedCodecSpecs(std::vector<AudioCodecSpec>* specs) { + for (uint8_t num_channels : {1, 2}) { + for (int sample_rate_hz : {8000, 16000, 32000}) { + specs->push_back( + {{"L16", sample_rate_hz, num_channels}, + {sample_rate_hz, num_channels, sample_rate_hz * num_channels * 16}}); + } + } +} + +} // namespace webrtc diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b_common.h b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b_common.h new file mode 100644 index 0000000000..3fae717ff3 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/pcm16b/pcm16b_common.h @@ -0,0 +1,22 @@ +/* + * Copyright (c) 2017 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. + */ + +#ifndef MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_COMMON_H_ +#define MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_COMMON_H_ + +#include <vector> + +#include "api/audio_codecs/audio_format.h" + +namespace webrtc { +void Pcm16BAppendSupportedCodecSpecs(std::vector<AudioCodecSpec>* specs); +} + +#endif // MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_COMMON_H_ |