xref: /external/chromium_org/media/video/capture/win/video_capture_device_mf_win.h

// 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.

// Windows specific implementation of VideoCaptureDevice.
// DirectShow is used for capturing. DirectShow provide its own threads
// for capturing.

#ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_
#define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_

#include <mfidl.h>
#include <mfreadwrite.h>

#include <vector>

#include "base/synchronization/lock.h"
#include "base/threading/non_thread_safe.h"
#include "base/win/scoped_comptr.h"
#include "media/base/media_export.h"
#include "media/video/capture/video_capture_device.h"

interface IMFSourceReader;

namespace media {

class MFReaderCallback;

const DWORD kFirstVideoStream =
    static_cast<DWORD>(MF_SOURCE_READER_FIRST_VIDEO_STREAM);

class MEDIA_EXPORT VideoCaptureDeviceMFWin
    : public base::NonThreadSafe,
      public VideoCaptureDevice {
 public:
  static bool FormatFromGuid(const GUID& guid, VideoPixelFormat* format);

  explicit VideoCaptureDeviceMFWin(const Name& device_name);
  virtual ~VideoCaptureDeviceMFWin();

  // Opens the device driver for this device.
  bool Init(const base::win::ScopedComPtr<IMFMediaSource>& source);

  // VideoCaptureDevice implementation.
  virtual void AllocateAndStart(const VideoCaptureParams& params,
                                scoped_ptr<VideoCaptureDevice::Client> client)
      OVERRIDE;
  virtual void StopAndDeAllocate() OVERRIDE;

  // Captured new video data.
  void OnIncomingCapturedData(const uint8* data,
                              int length,
                              int rotation,
                              const base::TimeTicks& time_stamp);

 private:
  void OnError(HRESULT hr);

  Name name_;
  base::win::ScopedComPtr<IMFActivate> device_;
  scoped_refptr<MFReaderCallback> callback_;

  base::Lock lock_;  // Used to guard the below variables.
  scoped_ptr<VideoCaptureDevice::Client> client_;
  base::win::ScopedComPtr<IMFSourceReader> reader_;
  VideoCaptureFormat capture_format_;
  bool capture_;

  DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceMFWin);
};

}  // namespace media

#endif  // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_