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      1 /*
      2  * libjingle
      3  * Copyright 2012 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_MEDIA_BASE_MUTEDVIDEOCAPTURER_H_
     29 #define TALK_MEDIA_BASE_MUTEDVIDEOCAPTURER_H_
     30 
     31 #include "talk/base/thread.h"
     32 #include "talk/media/base/videocapturer.h"
     33 
     34 namespace cricket {
     35 
     36 class MutedFramesGenerator;
     37 
     38 class MutedVideoCapturer : public VideoCapturer {
     39  public:
     40   static const char kCapturerId[];
     41 
     42   MutedVideoCapturer();
     43   virtual ~MutedVideoCapturer();
     44   virtual bool GetBestCaptureFormat(const VideoFormat& desired,
     45                                     VideoFormat* best_format);
     46   virtual CaptureState Start(const VideoFormat& capture_format);
     47   virtual void Stop();
     48   virtual bool IsRunning();
     49   virtual bool IsScreencast() const { return false; }
     50   virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs);
     51 
     52  protected:
     53   void OnMutedFrame(VideoFrame* muted_frame);
     54 
     55   talk_base::scoped_ptr<MutedFramesGenerator> frame_generator_;
     56 };
     57 
     58 }  // namespace cricket
     59 
     60 #endif  // TALK_MEDIA_BASE_MUTEDVIDEOCAPTURER_H_
     61