Convert audio samples in Whispernet.

components/audio_modem/audio_recorder_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUDIO_MODEM_AUDIO_RECORDER_IMPL_H_
 #define COMPONENTS_AUDIO_MODEM_AUDIO_RECORDER_IMPL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/audio_modem/audio_recorder.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
-#include "media/base/audio_converter.h"
 
 namespace base {
 class MessageLoop;
 }
 
 namespace media {
 class AudioBus;
 }
 
 namespace audio_modem {
 
 // The AudioRecorder class will record audio until told to stop.
 class AudioRecorderImpl final
     : public AudioRecorder,
-      public media::AudioInputStream::AudioInputCallback,
-      public media::AudioConverter::InputCallback {
+      public media::AudioInputStream::AudioInputCallback {
  public:
   using RecordedSamplesCallback = base::Callback<void(const std::string&)>;
 
   AudioRecorderImpl();
 
   // AudioRecorder overrides:
   void Initialize(const RecordedSamplesCallback& decode_callback) override;
   void Record() override;
   void Stop() override;
   void Finalize() override;
@@ skipping 29 matching lines @@
   // AudioInputStream::AudioInputCallback overrides:
   // Called by the audio recorder when a full packet of audio data is
   // available. This is called from a special audio thread and the
   // implementation should return as soon as possible.
   void OnData(media::AudioInputStream* stream,
               const media::AudioBus* source,
               uint32 hardware_delay_bytes,
               double volume) override;
   void OnError(media::AudioInputStream* stream) override;
 
-  // AudioConverter::InputCallback overrides:
-  double ProvideInput(media::AudioBus* dest,
-                      base::TimeDelta buffer_delay) override;
-
   // Flushes the audio loop, making sure that any queued operations are
   // performed.
   void FlushAudioLoopForTesting();
 
   bool is_recording_;
 
   media::AudioInputStream* stream_;
 
   RecordedSamplesCallback decode_callback_;
 
-  // ProvideInput will use this buffer as its source.
-  const media::AudioBus* temp_conversion_buffer_;
-
   // Outside of the ctor/Initialize method, only access the next variables on
   // the recording thread.
   scoped_ptr<media::AudioBus> buffer_;
   int total_buffer_frames_;
   int buffer_frame_index_;
 
-  scoped_ptr<media::AudioConverter> converter_;
-
   scoped_ptr<media::AudioInputStream> input_stream_for_testing_;
   scoped_ptr<media::AudioParameters> params_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRecorderImpl);
 };
 
 }  // namespace audio_modem
 
 #endif  // COMPONENTS_AUDIO_MODEM_AUDIO_RECORDER_IMPL_H_