diff options
Diffstat (limited to 'webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h')
-rw-r--r-- | webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h new file mode 100644 index 0000000000..b839488628 --- /dev/null +++ b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h @@ -0,0 +1,117 @@ +/* + * 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 WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_ENCODER_PCM_H_ +#define WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_ENCODER_PCM_H_ + +#include <vector> + +#include "webrtc/base/scoped_ptr.h" +#include "webrtc/modules/audio_coding/codecs/audio_encoder.h" + +namespace webrtc { + +class AudioEncoderPcm : public AudioEncoder { + public: + struct Config { + public: + bool IsOk() const; + + int frame_size_ms; + size_t num_channels; + int payload_type; + + protected: + explicit Config(int pt) + : frame_size_ms(20), num_channels(1), payload_type(pt) {} + }; + + ~AudioEncoderPcm() override; + + size_t MaxEncodedBytes() const override; + int SampleRateHz() const override; + size_t NumChannels() const override; + size_t Num10MsFramesInNextPacket() const override; + size_t Max10MsFramesInAPacket() const override; + int GetTargetBitrate() const override; + EncodedInfo EncodeInternal(uint32_t rtp_timestamp, + rtc::ArrayView<const int16_t> audio, + size_t max_encoded_bytes, + uint8_t* encoded) override; + void Reset() override; + + protected: + AudioEncoderPcm(const Config& config, int sample_rate_hz); + + virtual size_t EncodeCall(const int16_t* audio, + size_t input_len, + uint8_t* encoded) = 0; + + virtual size_t BytesPerSample() const = 0; + + private: + const int sample_rate_hz_; + const size_t num_channels_; + const int payload_type_; + const size_t num_10ms_frames_per_packet_; + const size_t full_frame_samples_; + std::vector<int16_t> speech_buffer_; + uint32_t first_timestamp_in_buffer_; +}; + +struct CodecInst; + +class AudioEncoderPcmA final : public AudioEncoderPcm { + public: + struct Config : public AudioEncoderPcm::Config { + Config() : AudioEncoderPcm::Config(8) {} + }; + + explicit AudioEncoderPcmA(const Config& config) + : AudioEncoderPcm(config, kSampleRateHz) {} + explicit AudioEncoderPcmA(const CodecInst& codec_inst); + + protected: + size_t EncodeCall(const int16_t* audio, + size_t input_len, + uint8_t* encoded) override; + + size_t BytesPerSample() const override; + + private: + static const int kSampleRateHz = 8000; + RTC_DISALLOW_COPY_AND_ASSIGN(AudioEncoderPcmA); +}; + +class AudioEncoderPcmU final : public AudioEncoderPcm { + public: + struct Config : public AudioEncoderPcm::Config { + Config() : AudioEncoderPcm::Config(0) {} + }; + + explicit AudioEncoderPcmU(const Config& config) + : AudioEncoderPcm(config, kSampleRateHz) {} + explicit AudioEncoderPcmU(const CodecInst& codec_inst); + + protected: + size_t EncodeCall(const int16_t* audio, + size_t input_len, + uint8_t* encoded) override; + + size_t BytesPerSample() const override; + + private: + static const int kSampleRateHz = 8000; + RTC_DISALLOW_COPY_AND_ASSIGN(AudioEncoderPcmU); +}; + +} // namespace webrtc + +#endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_ENCODER_PCM_H_ |