1 /* 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 12 #define MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 13 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include <vector> 18 19 #include "api/audio_codecs/audio_decoder.h" 20 #include "rtc_base/buffer.h" 21 #include "rtc_base/checks.h" 22 23 namespace webrtc { 24 25 class AudioDecoderPcmU final : public AudioDecoder { 26 public: AudioDecoderPcmU(size_t num_channels)27 explicit AudioDecoderPcmU(size_t num_channels) : num_channels_(num_channels) { 28 RTC_DCHECK_GE(num_channels, 1); 29 } 30 31 AudioDecoderPcmU(const AudioDecoderPcmU&) = delete; 32 AudioDecoderPcmU& operator=(const AudioDecoderPcmU&) = delete; 33 34 void Reset() override; 35 std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload, 36 uint32_t timestamp) override; 37 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; 38 int SampleRateHz() const override; 39 size_t Channels() const override; 40 41 protected: 42 int DecodeInternal(const uint8_t* encoded, 43 size_t encoded_len, 44 int sample_rate_hz, 45 int16_t* decoded, 46 SpeechType* speech_type) override; 47 48 private: 49 const size_t num_channels_; 50 }; 51 52 class AudioDecoderPcmA final : public AudioDecoder { 53 public: AudioDecoderPcmA(size_t num_channels)54 explicit AudioDecoderPcmA(size_t num_channels) : num_channels_(num_channels) { 55 RTC_DCHECK_GE(num_channels, 1); 56 } 57 58 AudioDecoderPcmA(const AudioDecoderPcmA&) = delete; 59 AudioDecoderPcmA& operator=(const AudioDecoderPcmA&) = delete; 60 61 void Reset() override; 62 std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload, 63 uint32_t timestamp) override; 64 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; 65 int SampleRateHz() const override; 66 size_t Channels() const override; 67 68 protected: 69 int DecodeInternal(const uint8_t* encoded, 70 size_t encoded_len, 71 int sample_rate_hz, 72 int16_t* decoded, 73 SpeechType* speech_type) override; 74 75 private: 76 const size_t num_channels_; 77 }; 78 79 } // namespace webrtc 80 81 #endif // MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 82