Home | History | Annotate | Download | only in objc 
      1 /*
      2  * libjingle
      3  * Copyright 2015 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_APP_WEBRTC_OBJC_AVFOUNDATION_VIDEO_CAPTURER_H_
     29 #define TALK_APP_WEBRTC_OBJC_AVFOUNDATION_VIDEO_CAPTURER_H_
     30 
     31 #include "talk/media/base/videocapturer.h"
     32 #include "webrtc/base/scoped_ptr.h"
     33 #include "webrtc/video_frame.h"
     34 
     35 #import <AVFoundation/AVFoundation.h>
     36 
     37 @class RTCAVFoundationVideoCapturerInternal;
     38 
     39 namespace webrtc {
     40 
     41 class AVFoundationVideoCapturer : public cricket::VideoCapturer {
     42  public:
     43   AVFoundationVideoCapturer();
     44   ~AVFoundationVideoCapturer();
     45 
     46   cricket::CaptureState Start(const cricket::VideoFormat& format) override;
     47   void Stop() override;
     48   bool IsRunning() override;
     49   bool IsScreencast() const override {
     50     return false;
     51   }
     52   bool GetPreferredFourccs(std::vector<uint32_t>* fourccs) override {
     53     fourccs->push_back(cricket::FOURCC_NV12);
     54     return true;
     55   }
     56 
     57   // Returns the active capture session.
     58   AVCaptureSession* GetCaptureSession();
     59 
     60   // Switches the camera being used (either front or back).
     61   void SetUseBackCamera(bool useBackCamera);
     62   bool GetUseBackCamera() const;
     63 
     64   // Converts the sample buffer into a cricket::CapturedFrame and signals the
     65   // frame for capture.
     66   void CaptureSampleBuffer(CMSampleBufferRef sampleBuffer);
     67 
     68  private:
     69   // Used to signal frame capture on the thread that capturer was started on.
     70   void SignalFrameCapturedOnStartThread(const cricket::CapturedFrame* frame);
     71 
     72   RTCAVFoundationVideoCapturerInternal* _capturer;
     73   rtc::Thread* _startThread;  // Set in Start(), unset in Stop().
     74 };  // AVFoundationVideoCapturer
     75 
     76 }  // namespace webrtc
     77 
     78 #endif  // TALK_APP_WEBRTC_OBJC_AVFOUNDATION_CAPTURER_H_
     79