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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_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_IMPL_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_IMPL_H_
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "content/renderer/media/audio_message_filter.h"
#include "webkit/plugins/ppapi/plugin_delegate.h"
class AudioParameters;
namespace base {
class MessageLoopProxy;
}
class PepperPlatformAudioOutputImpl
: public webkit::ppapi::PluginDelegate::PlatformAudioOutput,
public AudioMessageFilter::Delegate,
public base::RefCountedThreadSafe<PepperPlatformAudioOutputImpl> {
public:
virtual ~PepperPlatformAudioOutputImpl();
// Factory function, returns NULL on failure. StreamCreated() will be called
// when the stream is created.
static PepperPlatformAudioOutputImpl* Create(
int sample_rate,
int frames_per_buffer,
webkit::ppapi::PluginDelegate::PlatformAudioCommonClient* client);
// PlatformAudioOutput implementation (called on main thread).
virtual bool StartPlayback() OVERRIDE;
virtual bool StopPlayback() OVERRIDE;
virtual void ShutDown() OVERRIDE;
private:
PepperPlatformAudioOutputImpl();
bool Initialize(
int sample_rate,
int frames_per_buffer,
webkit::ppapi::PluginDelegate::PlatformAudioCommonClient* client);
// I/O thread backends to above functions.
void InitializeOnIOThread(const AudioParameters& params);
void StartPlaybackOnIOThread();
void StopPlaybackOnIOThread();
void ShutDownOnIOThread();
// AudioMessageFilter::Delegate.
virtual void OnStateChanged(AudioStreamState state) OVERRIDE;
virtual void OnStreamCreated(base::SharedMemoryHandle handle,
base::SyncSocket::Handle socket_handle,
uint32 length) OVERRIDE;
// The client to notify when the stream is created. THIS MUST ONLY BE
// ACCESSED ON THE MAIN THREAD.
webkit::ppapi::PluginDelegate::PlatformAudioCommonClient* client_;
// MessageFilter used to send/receive IPC. THIS MUST ONLY BE ACCESSED ON THE
// I/O thread except to send messages and get the message loop.
scoped_refptr<AudioMessageFilter> filter_;
// Our ID on the MessageFilter. THIS MUST ONLY BE ACCESSED ON THE I/O THREAD
// or else you could race with the initialize function which sets it.
int32 stream_id_;
base::MessageLoopProxy* main_message_loop_proxy_;
DISALLOW_COPY_AND_ASSIGN(PepperPlatformAudioOutputImpl);
};
#endif // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_IMPL_H_
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