content/renderer/media/media_stream_video_capturer_source.h

   1 // Copyright 2014 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 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
   6 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
   7
   8 #include "base/callback.h"
   9 #include "base/gtest_prod_util.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/threading/thread_checker.h"
  12 #include "content/common/media/video_capture.h"
  13 #include "content/renderer/media/media_stream_video_source.h"
  14
  15 namespace media{
  16 class VideoCapturerSource;
  17 }  // namespace media
  18
  19 namespace content {
  20
  21 // Representation of a video stream coming from a camera, owned by Blink as
  22 // WebMediaStreamSource. Objects of this class are created and live on main
  23 // Render thread. Objects can be constructed either by indicating a |device| to
  24 // look for, or by plugging in a |source| constructed elsewhere.
  25 class CONTENT_EXPORT MediaStreamVideoCapturerSource
  26     : public MediaStreamVideoSource {
  27  public:
  28   MediaStreamVideoCapturerSource(const SourceStoppedCallback& stop_callback,
  29                                  scoped_ptr<media::VideoCapturerSource> source);
  30   MediaStreamVideoCapturerSource(const SourceStoppedCallback& stop_callback,
  31                                  const StreamDeviceInfo& device_info);
  32   virtual ~MediaStreamVideoCapturerSource();
  33
  34  private:
  35   friend class MediaStreamVideoCapturerSourceTest;
  36
  37   // Implements MediaStreamVideoSource.
  38   void GetCurrentSupportedFormats(
  39       int max_requested_width,
  40       int max_requested_height,
  41       double max_requested_frame_rate,
  42       const VideoCaptureDeviceFormatsCB& callback) override;
  43   void StartSourceImpl(
  44       const media::VideoCaptureFormat& format,
  45       const blink::WebMediaConstraints& constraints,
  46       const VideoCaptureDeliverFrameCB& frame_callback) override;
  47   void StopSourceImpl() override;
  48
  49   // Method to bind as RunningCallback in VideoCapturerSource::StartCapture().
  50   void OnStarted(bool result);
  51
  52   const char* GetPowerLineFrequencyForTesting() const;
  53
  54   // The source that provides video frames.
  55   const scoped_ptr<media::VideoCapturerSource> source_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
  58 };
  59
  60 }  // namespace content
  61
  62 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_