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 MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_DECODER_OPUS_H_
12 #define MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_DECODER_OPUS_H_
13 
14 #include "api/audio_codecs/audio_decoder.h"
15 #include "modules/audio_coding/codecs/opus/opus_interface.h"
16 #include "rtc_base/constructormagic.h"
17 
18 namespace webrtc {
19 
20 class AudioDecoderOpusImpl final : public AudioDecoder {
21  public:
22   explicit AudioDecoderOpusImpl(size_t num_channels);
23   ~AudioDecoderOpusImpl() override;
24 
25   std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
26                                         uint32_t timestamp) override;
27   void Reset() override;
28   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
29   int PacketDurationRedundant(const uint8_t* encoded,
30                               size_t encoded_len) const override;
31   bool PacketHasFec(const uint8_t* encoded, size_t encoded_len) const override;
32   int SampleRateHz() const override;
33   size_t Channels() const override;
34 
35  protected:
36   int DecodeInternal(const uint8_t* encoded,
37                      size_t encoded_len,
38                      int sample_rate_hz,
39                      int16_t* decoded,
40                      SpeechType* speech_type) override;
41   int DecodeRedundantInternal(const uint8_t* encoded,
42                               size_t encoded_len,
43                               int sample_rate_hz,
44                               int16_t* decoded,
45                               SpeechType* speech_type) override;
46 
47  private:
48   OpusDecInst* dec_state_;
49   const size_t channels_;
50   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderOpusImpl);
51 };
52 
53 }  // namespace webrtc
54 
55 #endif  // MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_DECODER_OPUS_H_
56