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_OPUS_AUDIO_DECODER_OPUS_H_
12 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_DECODER_OPUS_H_
13 
14 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h"
15 #include "webrtc/modules/audio_coding/codecs/opus/opus_interface.h"
16 
17 namespace webrtc {
18 
19 class AudioDecoderOpus final : public AudioDecoder {
20  public:
21   explicit AudioDecoderOpus(size_t num_channels);
22   ~AudioDecoderOpus() override;
23 
24   void Reset() override;
25   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
26   int PacketDurationRedundant(const uint8_t* encoded,
27                               size_t encoded_len) const override;
28   bool PacketHasFec(const uint8_t* encoded, size_t encoded_len) const override;
29   size_t Channels() const override;
30 
31  protected:
32   int DecodeInternal(const uint8_t* encoded,
33                      size_t encoded_len,
34                      int sample_rate_hz,
35                      int16_t* decoded,
36                      SpeechType* speech_type) override;
37   int DecodeRedundantInternal(const uint8_t* encoded,
38                               size_t encoded_len,
39                               int sample_rate_hz,
40                               int16_t* decoded,
41                               SpeechType* speech_type) override;
42 
43  private:
44   OpusDecInst* dec_state_;
45   const size_t channels_;
46   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderOpus);
47 };
48 
49 }  // namespace webrtc
50 
51 #endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_DECODER_OPUS_H_
52