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#ifndef TALK_APP_WEBRTC_ANDROIDVIDEOCAPTURER_H_
28#define TALK_APP_WEBRTC_ANDROIDVIDEOCAPTURER_H_
29
30#include <string>
31#include <vector>
32
33#include "talk/media/base/videocapturer.h"
34#include "webrtc/base/thread_checker.h"
35#include "webrtc/common_video/include/video_frame_buffer.h"
36
37namespace webrtc {
38
39class AndroidVideoCapturer;
40
41class AndroidVideoCapturerDelegate : public rtc::RefCountInterface {
42 public:
43  virtual ~AndroidVideoCapturerDelegate() {}
44  // Start capturing. The implementation of the delegate must call
45  // AndroidVideoCapturer::OnCapturerStarted with the result of this request.
46  virtual void Start(int width, int height, int framerate,
47                     AndroidVideoCapturer* capturer) = 0;
48
49  // Stops capturing.
50  // The delegate may not call into AndroidVideoCapturer after this call.
51  virtual void Stop() = 0;
52
53  // Must returns a JSON string "{{width=xxx, height=xxx, framerate = xxx}}"
54  virtual std::string GetSupportedFormats() = 0;
55};
56
57// Android implementation of cricket::VideoCapturer for use with WebRtc
58// PeerConnection.
59class AndroidVideoCapturer : public cricket::VideoCapturer {
60 public:
61  explicit AndroidVideoCapturer(
62      const rtc::scoped_refptr<AndroidVideoCapturerDelegate>& delegate);
63  virtual ~AndroidVideoCapturer();
64
65  // Called from JNI when the capturer has been started.
66  void OnCapturerStarted(bool success);
67
68  // Called from JNI when a new frame has been captured.
69  // Argument |buffer| is intentionally by value, for use with rtc::Bind.
70  void OnIncomingFrame(
71      const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& buffer,
72      int rotation,
73      int64_t time_stamp);
74
75  // Called from JNI to request a new video format.
76  void OnOutputFormatRequest(int width, int height, int fps);
77
78  AndroidVideoCapturerDelegate* delegate() { return delegate_.get(); }
79
80  // cricket::VideoCapturer implementation.
81  bool GetBestCaptureFormat(const cricket::VideoFormat& desired,
82                            cricket::VideoFormat* best_format) override;
83
84 private:
85  // cricket::VideoCapturer implementation.
86  // Video frames will be delivered using
87  // cricket::VideoCapturer::SignalFrameCaptured on the thread that calls Start.
88  cricket::CaptureState Start(
89      const cricket::VideoFormat& capture_format) override;
90  void Stop() override;
91  bool IsRunning() override;
92  bool IsScreencast() const override { return false; }
93  bool GetPreferredFourccs(std::vector<uint32_t>* fourccs) override;
94
95  bool running_;
96  rtc::scoped_refptr<AndroidVideoCapturerDelegate> delegate_;
97
98  rtc::ThreadChecker thread_checker_;
99
100  class FrameFactory;
101  FrameFactory* frame_factory_;  // Owned by cricket::VideoCapturer.
102
103  cricket::CaptureState current_state_;
104};
105
106}  // namespace webrtc
107
108#endif  // TALK_APP_WEBRTC_ANDROIDVIDEOCAPTURER_H_
109