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// 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/file_descriptor_posix.h"
#include "base/process/process.h"
#include "base/sync_socket.h"
#include "media/audio/audio_input_controller.h"
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);
virtual ~AudioInputSyncWriter();
// media::AudioOutputController::SyncWriter implementation.
virtual void UpdateRecordedBytes(uint32 bytes) OVERRIDE;
virtual uint32 Write(const void* data,
uint32 size,
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_;
DISALLOW_IMPLICIT_CONSTRUCTORS(AudioInputSyncWriter);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_SYNC_WRITER_H_
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