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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_INPUT_IMPL_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_INPUT_IMPL_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "content/renderer/media/audio_input_message_filter.h"
#include "media/audio/audio_parameters.h"
#include "webkit/plugins/ppapi/plugin_delegate.h"
namespace media {
class AudioParameters;
}
namespace content {
class PepperPluginDelegateImpl;
// PepperPlatformAudioInputImpl is operated on two threads: the main thread (the
// thread on which objects are created) and the I/O thread. All public methods,
// except the destructor, must be called on the main thread. The notifications
// to the users of this class (via the PlatformAudioInputClient interface) are
// also sent on the main thread. Internally, this class sends audio input IPC
// messages and receives AudioInputMessageFilter::Delegate notifications on the
// I/O thread.
class PepperPlatformAudioInputImpl
: public webkit::ppapi::PluginDelegate::PlatformAudioInput,
public AudioInputMessageFilter::Delegate,
public base::RefCountedThreadSafe<PepperPlatformAudioInputImpl> {
public:
// Factory function, returns NULL on failure. StreamCreated() will be called
// when the stream is created.
static PepperPlatformAudioInputImpl* Create(
const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
const std::string& device_id,
int sample_rate,
int frames_per_buffer,
webkit::ppapi::PluginDelegate::PlatformAudioInputClient* client);
// PlatformAudioInput implementation (called on main thread).
virtual void StartCapture() OVERRIDE;
virtual void StopCapture() OVERRIDE;
virtual void ShutDown() OVERRIDE;
// AudioInputMessageFilter::Delegate.
virtual void OnStreamCreated(base::SharedMemoryHandle handle,
base::SyncSocket::Handle socket_handle,
uint32 length) OVERRIDE;
virtual void OnVolume(double volume) OVERRIDE;
virtual void OnStateChanged(AudioStreamState state) OVERRIDE;
virtual void OnDeviceReady(const std::string&) OVERRIDE;
protected:
virtual ~PepperPlatformAudioInputImpl();
private:
friend class base::RefCountedThreadSafe<PepperPlatformAudioInputImpl>;
PepperPlatformAudioInputImpl();
bool Initialize(
const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
const std::string& device_id,
int sample_rate,
int frames_per_buffer,
webkit::ppapi::PluginDelegate::PlatformAudioInputClient* client);
// I/O thread backends to above functions.
void InitializeOnIOThread(int session_id);
void StartCaptureOnIOThread();
void StopCaptureOnIOThread();
void ShutDownOnIOThread();
void OnDeviceOpened(int request_id,
bool succeeded,
const std::string& label);
void CloseDevice();
void NotifyStreamCreationFailed();
// The client to notify when the stream is created. THIS MUST ONLY BE
// ACCESSED ON THE MAIN THREAD.
webkit::ppapi::PluginDelegate::PlatformAudioInputClient* 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<AudioInputMessageFilter> 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_;
// THIS MUST ONLY BE ACCESSED ON THE MAIN THREAD.
base::WeakPtr<PepperPluginDelegateImpl> plugin_delegate_;
// The unique ID to identify the opened device. THIS MUST ONLY BE ACCESSED ON
// THE MAIN THREAD.
std::string label_;
// Whether ShutDownOnIOThread() has been called. THIS MUST ONLY BE ACCESSED ON
// THE I/O THREAD.
bool shutdown_called_;
// Initialized on the main thread and accessed on the I/O thread afterwards.
media::AudioParameters params_;
DISALLOW_COPY_AND_ASSIGN(PepperPlatformAudioInputImpl);
};
} // namespace content
#endif // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_INPUT_IMPL_H_
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