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
39namespace webrtc {
40
41class 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