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
AudioDecoderPcm16B(size_t num_channels)18 AudioDecoderPcm16B::AudioDecoderPcm16B(size_t num_channels)
19 : num_channels_(num_channels) {
20 RTC_DCHECK_GE(num_channels, 1u);
21 }
22
Reset()23 void AudioDecoderPcm16B::Reset() {}
24
Channels() const25 size_t AudioDecoderPcm16B::Channels() const {
26 return num_channels_;
27 }
28
DecodeInternal(const uint8_t * encoded,size_t encoded_len,int sample_rate_hz,int16_t * decoded,SpeechType * speech_type)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
PacketDuration(const uint8_t * encoded,size_t encoded_len) const42 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