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_G711_AUDIO_DECODER_PCM_H_
12 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_
13 
14 #include "webrtc/base/checks.h"
15 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h"
16 
17 namespace webrtc {
18 
19 class AudioDecoderPcmU final : public AudioDecoder {
20  public:
AudioDecoderPcmU(size_t num_channels)21   explicit AudioDecoderPcmU(size_t num_channels) : num_channels_(num_channels) {
22     RTC_DCHECK_GE(num_channels, 1u);
23   }
24   void Reset() override;
25   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
26   size_t Channels() const override;
27 
28  protected:
29   int DecodeInternal(const uint8_t* encoded,
30                      size_t encoded_len,
31                      int sample_rate_hz,
32                      int16_t* decoded,
33                      SpeechType* speech_type) override;
34 
35  private:
36   const size_t num_channels_;
37   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmU);
38 };
39 
40 class AudioDecoderPcmA final : public AudioDecoder {
41  public:
AudioDecoderPcmA(size_t num_channels)42   explicit AudioDecoderPcmA(size_t num_channels) : num_channels_(num_channels) {
43     RTC_DCHECK_GE(num_channels, 1u);
44   }
45   void Reset() override;
46   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
47   size_t Channels() const override;
48 
49  protected:
50   int DecodeInternal(const uint8_t* encoded,
51                      size_t encoded_len,
52                      int sample_rate_hz,
53                      int16_t* decoded,
54                      SpeechType* speech_type) override;
55 
56  private:
57   const size_t num_channels_;
58   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmA);
59 };
60 
61 }  // namespace webrtc
62 
63 #endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_
64