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// Copyright 2014 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 MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_FACTORY_H_
#define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_FACTORY_H_
#include "base/threading/thread_checker.h"
#include "media/video/capture/video_capture_device.h"
namespace media {
// VideoCaptureDeviceFactory is the base class for creation of video capture
// devices in the different platforms. VCDFs are created by MediaStreamManager
// on IO thread and plugged into VideoCaptureManager, who owns and operates them
// in Device Thread (a.k.a. Audio Thread).
class MEDIA_EXPORT VideoCaptureDeviceFactory {
public:
static scoped_ptr<VideoCaptureDeviceFactory> CreateFactory(
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
VideoCaptureDeviceFactory();
virtual ~VideoCaptureDeviceFactory();
// Creates a VideoCaptureDevice object. Returns NULL if something goes wrong.
virtual scoped_ptr<VideoCaptureDevice> Create(
const VideoCaptureDevice::Name& device_name) = 0;
// Asynchronous version of GetDeviceNames calling back to |callback|.
virtual void EnumerateDeviceNames(const base::Callback<
void(scoped_ptr<media::VideoCaptureDevice::Names>)>& callback);
// Gets the supported formats of a particular device attached to the system.
// This method should be called before allocating or starting a device. In
// case format enumeration is not supported, or there was a problem, the
// formats array will be empty.
virtual void GetDeviceSupportedFormats(
const VideoCaptureDevice::Name& device,
VideoCaptureFormats* supported_formats) = 0;
// Gets the supported formats for still image of a particular device attached
// to the system. In case format enumeration is not supported, or there was
// a problem, the formats array will be empty.
virtual void GetDeviceSupportedImageFormats(
const VideoCaptureDevice::Name& device,
ImageCaptureFormats* supported_formats) {}
protected:
// Gets the names of all video capture devices connected to this computer.
// Used by the default implementation of EnumerateDeviceNames().
virtual void GetDeviceNames(VideoCaptureDevice::Names* device_names) = 0;
base::ThreadChecker thread_checker_;
private:
static VideoCaptureDeviceFactory* CreateVideoCaptureDeviceFactory(
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceFactory);
};
} // namespace media
#endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_FACTORY_H_