media/capture/video/win/sink_input_pin_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 // Implement a DirectShow input pin used for receiving captured frames from
   6 // a DirectShow Capture filter.
   7
   8 #ifndef MEDIA_VIDEO_CAPTURE_WIN_SINK_INPUT_PIN_WIN_H_
   9 #define MEDIA_VIDEO_CAPTURE_WIN_SINK_INPUT_PIN_WIN_H_
  10
  11 #include "media/base/video_capture_types.h"
  12 #include "media/capture/video/video_capture_device.h"
  13 #include "media/capture/video/win/pin_base_win.h"
  14 #include "media/capture/video/win/sink_filter_win.h"
  15
  16 namespace media {
  17
  18 // Const used for converting Seconds to REFERENCE_TIME.
  19 extern const REFERENCE_TIME kSecondsToReferenceTime;
  20
  21 // Input pin of the SinkFilter.
  22 class SinkInputPin : public PinBase {
  23  public:
  24   SinkInputPin(IBaseFilter* filter, SinkFilterObserver* observer);
  25
  26   void SetRequestedMediaFormat(VideoCapturePixelFormat pixel_format,
  27                                float frame_rate,
  28                                const BITMAPINFOHEADER& info_header);
  29   // Returns the capability that is negotiated when this
  30   // pin is connected to a media filter.
  31   const VideoCaptureFormat& ResultingFormat();
  32
  33   // Implement PinBase.
  34   bool IsMediaTypeValid(const AM_MEDIA_TYPE* media_type) override;
  35   bool GetValidMediaType(int index, AM_MEDIA_TYPE* media_type) override;
  36
  37   STDMETHOD(Receive)(IMediaSample* media_sample) override;
  38
  39  private:
  40   ~SinkInputPin() override;
  41
  42   VideoCapturePixelFormat requested_pixel_format_;
  43   float requested_frame_rate_;
  44   BITMAPINFOHEADER requested_info_header_;
  45   VideoCaptureFormat resulting_format_;
  46   SinkFilterObserver* observer_;
  47
  48   DISALLOW_IMPLICIT_CONSTRUCTORS(SinkInputPin);
  49 };
  50
  51 }  // namespace media
  52
  53 #endif  // MEDIA_VIDEO_CAPTURE_WIN_SINK_INPUT_PIN_WIN_H_