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// Copyright (c) 2011 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.
//
// AudioInputDeviceManager manages the audio input devices. In particular it
// communicates with MediaStreamManager and AudioInputRendererHost on the
// browser IO thread, handles queries like enumerate/open/close from
// MediaStreamManager and start/stop from AudioInputRendererHost.
// All the queries and work are handled on the IO thread.
#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
#include <map>
#include "base/threading/thread.h"
#include "content/browser/renderer_host/media/media_stream_provider.h"
#include "content/common/content_export.h"
#include "content/common/media/media_stream_options.h"
#include "media/audio/audio_device_name.h"
namespace media_stream {
class AudioInputDeviceManagerEventHandler;
class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
public:
// Calling Start() with this kFakeOpenSessionId will open the default device,
// even though Open() has not been called. This is used to be able to use the
// AudioInputDeviceManager before MediaStream is implemented.
static const int kFakeOpenSessionId;
static const int kInvalidSessionId;
static const char kInvalidDeviceId[];
AudioInputDeviceManager();
virtual ~AudioInputDeviceManager();
// MediaStreamProvider implementation, called on IO thread.
virtual void Register(MediaStreamProviderListener* listener) OVERRIDE;
virtual void Unregister() OVERRIDE;
virtual void EnumerateDevices() OVERRIDE;
virtual int Open(const StreamDeviceInfo& device) OVERRIDE;
virtual void Close(int session_id) OVERRIDE;
// Functions used by AudioInputRenderHost, called on IO thread.
// Start the device referenced by the session id.
void Start(int session_id,
AudioInputDeviceManagerEventHandler* event_handler);
// Stop the device referenced by the session id.
void Stop(int session_id);
private:
// Executed on IO thread to call Listener.
void DevicesEnumeratedOnIOThread(StreamDeviceInfoArray* devices);
void OpenedOnIOThread(int session_id);
void ClosedOnIOThread(int session_id);
void ErrorOnIOThread(int session_id, MediaStreamProviderError error);
MediaStreamProviderListener* listener_;
int next_capture_session_id_;
typedef std::map<int, AudioInputDeviceManagerEventHandler*> EventHandlerMap;
EventHandlerMap event_handlers_;
typedef std::map<int, media::AudioDeviceName> AudioInputDeviceMap;
AudioInputDeviceMap devices_;
DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
};
} // namespace media_stream
DISABLE_RUNNABLE_METHOD_REFCOUNT(media_stream::AudioInputDeviceManager);
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
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