// 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_MEDIA_AUDIO_DEVICE_FACTORY_H_
#define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
namespace media {
class AudioInputDevice;
class AudioOutputDevice;
}
namespace content {
// A factory for creating AudioOutputDevices and AudioInputDevices. There is a
// global factory function that can be installed for the purposes of testing to
// provide specialized implementations.
class CONTENT_EXPORT AudioDeviceFactory {
public:
// Creates an AudioOutputDevice using the currently registered factory.
// |render_view_id| and |render_frame_id| refer to the render view and render
// frame containing the entity producing the audio.
static scoped_refptr<media::AudioOutputDevice> NewOutputDevice(
int render_view_id, int render_frame_id);
// Creates an AudioInputDevice using the currently registered factory.
// |render_view_id| refers to the render view containing the entity consuming
// the audio.
static scoped_refptr<media::AudioInputDevice> NewInputDevice(
int render_view_id);
protected:
AudioDeviceFactory();
virtual ~AudioDeviceFactory();
// You can derive from this class and specify an implementation for these
// functions to provide alternate audio device implementations.
// If the return value of either of these function is NULL, we fall back
// on the default implementation.
virtual media::AudioOutputDevice* CreateOutputDevice(int render_view_id) = 0;
virtual media::AudioInputDevice* CreateInputDevice(int render_view_id) = 0;
private:
// The current globally registered factory. This is NULL when we should
// create the default AudioRendererSinks.
static AudioDeviceFactory* factory_;
DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_