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 #include "rtc_base/constructor_magic.h" 23 24 namespace webrtc { 25 26 class AudioDecoderPcmU final : public AudioDecoder { 27 public: AudioDecoderPcmU(size_t num_channels)28 explicit AudioDecoderPcmU(size_t num_channels) : num_channels_(num_channels) { 29 RTC_DCHECK_GE(num_channels, 1); 30 } 31 void Reset() override; 32 std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload, 33 uint32_t timestamp) override; 34 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; 35 int SampleRateHz() const override; 36 size_t Channels() const override; 37 38 protected: 39 int DecodeInternal(const uint8_t* encoded, 40 size_t encoded_len, 41 int sample_rate_hz, 42 int16_t* decoded, 43 SpeechType* speech_type) override; 44 45 private: 46 const size_t num_channels_; 47 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmU); 48 }; 49 50 class AudioDecoderPcmA final : public AudioDecoder { 51 public: AudioDecoderPcmA(size_t num_channels)52 explicit AudioDecoderPcmA(size_t num_channels) : num_channels_(num_channels) { 53 RTC_DCHECK_GE(num_channels, 1); 54 } 55 void Reset() override; 56 std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload, 57 uint32_t timestamp) override; 58 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; 59 int SampleRateHz() const override; 60 size_t Channels() const override; 61 62 protected: 63 int DecodeInternal(const uint8_t* encoded, 64 size_t encoded_len, 65 int sample_rate_hz, 66 int16_t* decoded, 67 SpeechType* speech_type) override; 68 69 private: 70 const size_t num_channels_; 71 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmA); 72 }; 73 74 } // namespace webrtc 75 76 #endif // MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 77