| /* |
| * 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/constructormagic.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; |
| |
| int SampleRateHz() const override; |
| size_t NumChannels() const override; |
| size_t Num10MsFramesInNextPacket() const override; |
| size_t Max10MsFramesInAPacket() const override; |
| int GetTargetBitrate() const override; |
| void Reset() override; |
| |
| protected: |
| AudioEncoderPcm(const Config& config, int sample_rate_hz); |
| |
| EncodedInfo EncodeImpl(uint32_t rtp_timestamp, |
| rtc::ArrayView<const int16_t> audio, |
| rtc::Buffer* encoded) override; |
| |
| virtual size_t EncodeCall(const int16_t* audio, |
| size_t input_len, |
| uint8_t* encoded) = 0; |
| |
| virtual size_t BytesPerSample() const = 0; |
| |
| // Used to set EncodedInfoLeaf::encoder_type in |
| // AudioEncoderPcm::EncodeImpl |
| virtual AudioEncoder::CodecType GetCodecType() 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; |
| |
| AudioEncoder::CodecType GetCodecType() 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; |
| |
| AudioEncoder::CodecType GetCodecType() 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_ |