Modifies AudioInputCallback::OnData and use media::AudioBus instead of plain byte vector

content/browser/renderer_host/media/audio_input_sync_writer.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_SYNC_WRITER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_SYNC_WRITER_H_
 
+#include "base/memory/scoped_vector.h"
 #include "base/process/process.h"
 #include "base/sync_socket.h"
 #include "base/time/time.h"
 #include "media/audio/audio_input_controller.h"
+#include "media/audio/audio_parameters.h"
+#include "media/base/audio_bus.h"
 
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 
 namespace base {
 class SharedMemory;
 }
 
 namespace content {
 // A AudioInputController::SyncWriter implementation using SyncSocket. This
 // is used by AudioInputController to provide a low latency data source for
 // transmitting audio packets between the browser process and the renderer
 // process.
 class AudioInputSyncWriter : public media::AudioInputController::SyncWriter {
  public:
   explicit AudioInputSyncWriter(base::SharedMemory* shared_memory,
-                                int shared_memory_segment_count);
+                                int shared_memory_segment_count,
+                                const media::AudioParameters& params);
 
   virtual ~AudioInputSyncWriter();
 
-  // media::AudioOutputController::SyncWriter implementation.
+  // media::AudioInputController::SyncWriter implementation.
   virtual void UpdateRecordedBytes(uint32 bytes) OVERRIDE;
-  virtual uint32 Write(const void* data,
-                       uint32 size,
-                       double volume,
-                       bool key_pressed) OVERRIDE;
+  virtual void Write(const media::AudioBus* data,
+                     double volume,
+                     bool key_pressed) OVERRIDE;
   virtual void Close() OVERRIDE;
 
   bool Init();
   bool PrepareForeignSocketHandle(base::ProcessHandle process_handle,
 #if defined(OS_WIN)
                                   base::SyncSocket::Handle* foreign_handle);
 #else
                                   base::FileDescriptor* foreign_handle);
 #endif
 
  private:
   base::SharedMemory* shared_memory_;
   uint32 shared_memory_segment_size_;
   uint32 shared_memory_segment_count_;
   uint32 current_segment_id_;
 
   // Socket for transmitting audio data.
   scoped_ptr<base::CancelableSyncSocket> socket_;
 
   // Socket to be used by the renderer. The reference is released after
   // PrepareForeignSocketHandle() is called and ran successfully.
   scoped_ptr<base::CancelableSyncSocket> foreign_socket_;
 
   // The time of the creation of this object.
   base::Time creation_time_;
 
   // The time of the last Write call.
   base::Time last_write_time_;
 
+  // Size in bytes of each audio bus.
+  const int audio_bus_memory_size_;
+
+  // Vector of audio buses allocated during construction and deleted in the
+  // destructor.
+  ScopedVector<media::AudioBus> audio_buses_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(AudioInputSyncWriter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_SYNC_WRITER_H_