media/capture/video/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/capture/video/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 : public base::NonThreadSafe,
  33                                              public VideoCaptureDevice {
  34  public:
  35   static bool FormatFromGuid(const GUID& guid, VideoCapturePixelFormat* format);
  36
  37   explicit VideoCaptureDeviceMFWin(const Name& device_name);
  38   ~VideoCaptureDeviceMFWin() override;
  39
  40   // Opens the device driver for this device.
  41   bool Init(const base::win::ScopedComPtr<IMFMediaSource>& source);
  42
  43   // VideoCaptureDevice implementation.
  44   void AllocateAndStart(const VideoCaptureParams& params,
  45                         scoped_ptr<VideoCaptureDevice::Client> client) override;
  46   void StopAndDeAllocate() override;
  47
  48   // Captured new video data.
  49   void OnIncomingCapturedData(const uint8* data,
  50                               int length,
  51                               int rotation,
  52                               const base::TimeTicks& time_stamp);
  53
  54  private:
  55   void OnError(HRESULT hr);
  56
  57   Name name_;
  58   base::win::ScopedComPtr<IMFActivate> device_;
  59   scoped_refptr<MFReaderCallback> callback_;
  60
  61   base::Lock lock_;  // Used to guard the below variables.
  62   scoped_ptr<VideoCaptureDevice::Client> client_;
  63   base::win::ScopedComPtr<IMFSourceReader> reader_;
  64   VideoCaptureFormat capture_format_;
  65   bool capture_;
  66
  67   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceMFWin);
  68 };
  69
  70 }  // namespace media
  71
  72 #endif  // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_