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 WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 12 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 13 14 #include "webrtc/base/checks.h" 15 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h" 16 17 namespace webrtc { 18 19 class AudioDecoderPcmU final : public AudioDecoder { 20 public: AudioDecoderPcmU(size_t num_channels)21 explicit AudioDecoderPcmU(size_t num_channels) : num_channels_(num_channels) { 22 RTC_DCHECK_GE(num_channels, 1u); 23 } 24 void Reset() override; 25 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; 26 size_t Channels() const override; 27 28 protected: 29 int DecodeInternal(const uint8_t* encoded, 30 size_t encoded_len, 31 int sample_rate_hz, 32 int16_t* decoded, 33 SpeechType* speech_type) override; 34 35 private: 36 const size_t num_channels_; 37 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmU); 38 }; 39 40 class AudioDecoderPcmA final : public AudioDecoder { 41 public: AudioDecoderPcmA(size_t num_channels)42 explicit AudioDecoderPcmA(size_t num_channels) : num_channels_(num_channels) { 43 RTC_DCHECK_GE(num_channels, 1u); 44 } 45 void Reset() override; 46 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; 47 size_t Channels() const override; 48 49 protected: 50 int DecodeInternal(const uint8_t* encoded, 51 size_t encoded_len, 52 int sample_rate_hz, 53 int16_t* decoded, 54 SpeechType* speech_type) override; 55 56 private: 57 const size_t num_channels_; 58 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmA); 59 }; 60 61 } // namespace webrtc 62 63 #endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_ 64