blob: e95e487e88a95acc4f97077ac84206cd864d7c2f [file] [log] [blame]
// 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 "content/common/content_export.h"
namespace media {
class AudioInputDevice;
class AudioRendererSink;
}
namespace content {
// A factory for creating AudioRendererSinks. There is a global factory
// function that can be installed for the purposes of testing to provide
// a specialized AudioRendererSink class.
class CONTENT_EXPORT AudioDeviceFactory {
public:
// Creates an AudioRendererSink using the currently registered factory,
// or the default one if no factory is registered. Ownership of the returned
// pointer will be passed to the caller.
static media::AudioRendererSink* NewOutputDevice();
// TODO(henrika): Update AudioInputDevice to inherit from an interface
// similar to AudioRendererSink, but for input. Same for the callback
// interfaces.
static media::AudioInputDevice* NewInputDevice();
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::AudioRendererSink* CreateOutputDevice() = 0;
virtual media::AudioInputDevice* CreateInputDevice() = 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_