src/media/video/capture/win/video_capture_device_mf_win.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Windows specific implementation of VideoCaptureDevice.
   6 // DirectShow is used for capturing. DirectShow provide its own threads
   7 // for capturing.
   8
   9 #ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_
  10 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_
  11
  12 #include <mfidl.h>
  13 #include <mfreadwrite.h>
  14
  15 #include <vector>
  16
  17 #include "base/synchronization/lock.h"
  18 #include "base/threading/non_thread_safe.h"
  19 #include "base/win/scoped_comptr.h"
  20 #include "media/base/media_export.h"
  21 #include "media/video/capture/video_capture_device.h"
  22
  23 interface IMFSourceReader;
  24
  25 namespace media {
  26
  27 class MFReaderCallback;
  28
  29 const DWORD kFirstVideoStream =
  30     static_cast<DWORD>(MF_SOURCE_READER_FIRST_VIDEO_STREAM);
  31
  32 class MEDIA_EXPORT VideoCaptureDeviceMFWin
  33     : public base::NonThreadSafe,
  34       public VideoCaptureDevice {
  35  public:
  36   static bool FormatFromGuid(const GUID& guid, VideoPixelFormat* format);
  37
  38   explicit VideoCaptureDeviceMFWin(const Name& device_name);
  39   virtual ~VideoCaptureDeviceMFWin();
  40
  41   // Opens the device driver for this device.
  42   bool Init(const base::win::ScopedComPtr<IMFMediaSource>& source);
  43
  44   // VideoCaptureDevice implementation.
  45   virtual void AllocateAndStart(const VideoCaptureParams& params,
  46                                 scoped_ptr<VideoCaptureDevice::Client> client)
  47       OVERRIDE;
  48   virtual void StopAndDeAllocate() OVERRIDE;
  49
  50   // Captured new video data.
  51   void OnIncomingCapturedData(const uint8* data,
  52                               int length,
  53                               int rotation,
  54                               const base::TimeTicks& time_stamp);
  55
  56  private:
  57   void OnError(HRESULT hr);
  58
  59   Name name_;
  60   base::win::ScopedComPtr<IMFActivate> device_;
  61   scoped_refptr<MFReaderCallback> callback_;
  62
  63   base::Lock lock_;  // Used to guard the below variables.
  64   scoped_ptr<VideoCaptureDevice::Client> client_;
  65   base::win::ScopedComPtr<IMFSourceReader> reader_;
  66   VideoCaptureFormat capture_format_;
  67   bool capture_;
  68
  69   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceMFWin);
  70 };
  71
  72 }  // namespace media
  73
  74 #endif  // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_