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 #include "webrtc/modules/audio_coding/codecs/g711/audio_decoder_pcm.h" 12 13 #include "webrtc/modules/audio_coding/codecs/g711/g711_interface.h" 14 15 namespace webrtc { 16 17 void AudioDecoderPcmU::Reset() {} 18 19 size_t AudioDecoderPcmU::Channels() const { 20 return num_channels_; 21 } 22 23 int AudioDecoderPcmU::DecodeInternal(const uint8_t* encoded, 24 size_t encoded_len, 25 int sample_rate_hz, 26 int16_t* decoded, 27 SpeechType* speech_type) { 28 RTC_DCHECK_EQ(sample_rate_hz, 8000); 29 int16_t temp_type = 1; // Default is speech. 30 size_t ret = WebRtcG711_DecodeU(encoded, encoded_len, decoded, &temp_type); 31 *speech_type = ConvertSpeechType(temp_type); 32 return static_cast<int>(ret); 33 } 34 35 int AudioDecoderPcmU::PacketDuration(const uint8_t* encoded, 36 size_t encoded_len) const { 37 // One encoded byte per sample per channel. 38 return static_cast<int>(encoded_len / Channels()); 39 } 40 41 void AudioDecoderPcmA::Reset() {} 42 43 size_t AudioDecoderPcmA::Channels() const { 44 return num_channels_; 45 } 46 47 int AudioDecoderPcmA::DecodeInternal(const uint8_t* encoded, 48 size_t encoded_len, 49 int sample_rate_hz, 50 int16_t* decoded, 51 SpeechType* speech_type) { 52 RTC_DCHECK_EQ(sample_rate_hz, 8000); 53 int16_t temp_type = 1; // Default is speech. 54 size_t ret = WebRtcG711_DecodeA(encoded, encoded_len, decoded, &temp_type); 55 *speech_type = ConvertSpeechType(temp_type); 56 return static_cast<int>(ret); 57 } 58 59 int AudioDecoderPcmA::PacketDuration(const uint8_t* encoded, 60 size_t encoded_len) const { 61 // One encoded byte per sample per channel. 62 return static_cast<int>(encoded_len / Channels()); 63 } 64 65 } // namespace webrtc 66
