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/pcm16b/audio_decoder_pcm16b.h" 12 13 #include "webrtc/base/checks.h" 14 #include "webrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h" 15 16 namespace webrtc { 17 18 AudioDecoderPcm16B::AudioDecoderPcm16B(size_t num_channels) 19 : num_channels_(num_channels) { 20 RTC_DCHECK_GE(num_channels, 1u); 21 } 22 23 void AudioDecoderPcm16B::Reset() {} 24 25 size_t AudioDecoderPcm16B::Channels() const { 26 return num_channels_; 27 } 28 29 int AudioDecoderPcm16B::DecodeInternal(const uint8_t* encoded, 30 size_t encoded_len, 31 int sample_rate_hz, 32 int16_t* decoded, 33 SpeechType* speech_type) { 34 RTC_DCHECK(sample_rate_hz == 8000 || sample_rate_hz == 16000 || 35 sample_rate_hz == 32000 || sample_rate_hz == 48000) 36 << "Unsupported sample rate " << sample_rate_hz; 37 size_t ret = WebRtcPcm16b_Decode(encoded, encoded_len, decoded); 38 *speech_type = ConvertSpeechType(1); 39 return static_cast<int>(ret); 40 } 41 42 int AudioDecoderPcm16B::PacketDuration(const uint8_t* encoded, 43 size_t encoded_len) const { 44 // Two encoded byte per sample per channel. 45 return static_cast<int>(encoded_len / (2 * Channels())); 46 } 47 48 } // namespace webrtc 49
