Line data    Source code

       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/base/constructormagic.h"
      16             : #include "webrtc/modules/audio_coding/codecs/audio_decoder.h"
      17             : 
      18             : namespace webrtc {
      19             : 
      20           0 : class AudioDecoderPcmU final : public AudioDecoder {
      21             :  public:
      22           0 :   explicit AudioDecoderPcmU(size_t num_channels) : num_channels_(num_channels) {
      23           0 :     RTC_DCHECK_GE(num_channels, 1);
      24           0 :   }
      25             :   void Reset() override;
      26             :   std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
      27             :                                         uint32_t timestamp) override;
      28             :   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
      29             :   int SampleRateHz() const override;
      30             :   size_t Channels() const override;
      31             : 
      32             :  protected:
      33             :   int DecodeInternal(const uint8_t* encoded,
      34             :                      size_t encoded_len,
      35             :                      int sample_rate_hz,
      36             :                      int16_t* decoded,
      37             :                      SpeechType* speech_type) override;
      38             : 
      39             :  private:
      40             :   const size_t num_channels_;
      41             :   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmU);
      42             : };
      43             : 
      44           0 : class AudioDecoderPcmA final : public AudioDecoder {
      45             :  public:
      46           0 :   explicit AudioDecoderPcmA(size_t num_channels) : num_channels_(num_channels) {
      47           0 :     RTC_DCHECK_GE(num_channels, 1);
      48           0 :   }
      49             :   void Reset() override;
      50             :   std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
      51             :                                         uint32_t timestamp) override;
      52             :   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
      53             :   int SampleRateHz() const override;
      54             :   size_t Channels() const override;
      55             : 
      56             :  protected:
      57             :   int DecodeInternal(const uint8_t* encoded,
      58             :                      size_t encoded_len,
      59             :                      int sample_rate_hz,
      60             :                      int16_t* decoded,
      61             :                      SpeechType* speech_type) override;
      62             : 
      63             :  private:
      64             :   const size_t num_channels_;
      65             :   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmA);
      66             : };
      67             : 
      68             : }  // namespace webrtc
      69             : 
      70             : #endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_G711_AUDIO_DECODER_PCM_H_