1 /*
2  * libjingle
3  * Copyright 2004 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_FAKEVIDEOCAPTURER_H_
29 #define TALK_MEDIA_BASE_FAKEVIDEOCAPTURER_H_
30 
31 #include <string.h>
32 
33 #include <vector>
34 
35 #include "talk/media/base/videocapturer.h"
36 #include "talk/media/base/videocommon.h"
37 #include "talk/media/base/videoframe.h"
38 #include "webrtc/base/timeutils.h"
39 #ifdef HAVE_WEBRTC_VIDEO
40 #include "talk/media/webrtc/webrtcvideoframefactory.h"
41 #endif
42 
43 namespace cricket {
44 
45 // Fake video capturer that allows the test to manually pump in frames.
46 class FakeVideoCapturer : public cricket::VideoCapturer {
47  public:
FakeVideoCapturer()48   FakeVideoCapturer()
49       : running_(false),
50         initial_unix_timestamp_(time(NULL) * rtc::kNumNanosecsPerSec),
51         next_timestamp_(rtc::kNumNanosecsPerMillisec),
52         is_screencast_(false),
53         rotation_(webrtc::kVideoRotation_0) {
54 #ifdef HAVE_WEBRTC_VIDEO
55     set_frame_factory(new cricket::WebRtcVideoFrameFactory());
56 #endif
57     // Default supported formats. Use ResetSupportedFormats to over write.
58     std::vector<cricket::VideoFormat> formats;
59     formats.push_back(cricket::VideoFormat(1280, 720,
60         cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
61     formats.push_back(cricket::VideoFormat(640, 480,
62         cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
63     formats.push_back(cricket::VideoFormat(320, 240,
64         cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
65     formats.push_back(cricket::VideoFormat(160, 120,
66         cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
67     formats.push_back(cricket::VideoFormat(1280, 720,
68         cricket::VideoFormat::FpsToInterval(60), cricket::FOURCC_I420));
69     ResetSupportedFormats(formats);
70   }
~FakeVideoCapturer()71   ~FakeVideoCapturer() {
72     SignalDestroyed(this);
73   }
74 
ResetSupportedFormats(const std::vector<cricket::VideoFormat> & formats)75   void ResetSupportedFormats(const std::vector<cricket::VideoFormat>& formats) {
76     SetSupportedFormats(formats);
77   }
CaptureFrame()78   bool CaptureFrame() {
79     if (!GetCaptureFormat()) {
80       return false;
81     }
82     return CaptureCustomFrame(GetCaptureFormat()->width,
83                               GetCaptureFormat()->height,
84                               GetCaptureFormat()->interval,
85                               GetCaptureFormat()->fourcc);
86   }
CaptureCustomFrame(int width,int height,uint32_t fourcc)87   bool CaptureCustomFrame(int width, int height, uint32_t fourcc) {
88     // default to 30fps
89     return CaptureCustomFrame(width, height, 33333333, fourcc);
90   }
CaptureCustomFrame(int width,int height,int64_t timestamp_interval,uint32_t fourcc)91   bool CaptureCustomFrame(int width,
92                           int height,
93                           int64_t timestamp_interval,
94                           uint32_t fourcc) {
95     if (!running_) {
96       return false;
97     }
98     // Currently, |fourcc| is always I420 or ARGB.
99     // TODO(fbarchard): Extend SizeOf to take fourcc.
100     uint32_t size = 0u;
101     if (fourcc == cricket::FOURCC_ARGB) {
102       size = width * 4 * height;
103     } else if (fourcc == cricket::FOURCC_I420) {
104       size = static_cast<uint32_t>(cricket::VideoFrame::SizeOf(width, height));
105     } else {
106       return false;  // Unsupported FOURCC.
107     }
108     if (size == 0u) {
109       return false;  // Width and/or Height were zero.
110     }
111 
112     cricket::CapturedFrame frame;
113     frame.width = width;
114     frame.height = height;
115     frame.fourcc = fourcc;
116     frame.data_size = size;
117     frame.time_stamp = initial_unix_timestamp_ + next_timestamp_;
118     next_timestamp_ += timestamp_interval;
119 
120     rtc::scoped_ptr<char[]> data(new char[size]);
121     frame.data = data.get();
122     // Copy something non-zero into the buffer so Validate wont complain that
123     // the frame is all duplicate.
124     memset(frame.data, 1, size / 2);
125     memset(reinterpret_cast<uint8_t*>(frame.data) + (size / 2), 2,
126            size - (size / 2));
127     memcpy(frame.data, reinterpret_cast<const uint8_t*>(&fourcc), 4);
128     frame.rotation = rotation_;
129     // TODO(zhurunz): SignalFrameCaptured carry returned value to be able to
130     // capture results from downstream.
131     SignalFrameCaptured(this, &frame);
132     return true;
133   }
134 
SignalCapturedFrame(cricket::CapturedFrame * frame)135   void SignalCapturedFrame(cricket::CapturedFrame* frame) {
136     SignalFrameCaptured(this, frame);
137   }
138 
139   sigslot::signal1<FakeVideoCapturer*> SignalDestroyed;
140 
Start(const cricket::VideoFormat & format)141   virtual cricket::CaptureState Start(const cricket::VideoFormat& format) {
142     cricket::VideoFormat supported;
143     if (GetBestCaptureFormat(format, &supported)) {
144       SetCaptureFormat(&supported);
145     }
146     running_ = true;
147     SetCaptureState(cricket::CS_RUNNING);
148     return cricket::CS_RUNNING;
149   }
Stop()150   virtual void Stop() {
151     running_ = false;
152     SetCaptureFormat(NULL);
153     SetCaptureState(cricket::CS_STOPPED);
154   }
IsRunning()155   virtual bool IsRunning() { return running_; }
SetScreencast(bool is_screencast)156   void SetScreencast(bool is_screencast) {
157     is_screencast_ = is_screencast;
158   }
IsScreencast()159   virtual bool IsScreencast() const { return is_screencast_; }
GetPreferredFourccs(std::vector<uint32_t> * fourccs)160   bool GetPreferredFourccs(std::vector<uint32_t>* fourccs) {
161     fourccs->push_back(cricket::FOURCC_I420);
162     fourccs->push_back(cricket::FOURCC_MJPG);
163     return true;
164   }
165 
SetRotation(webrtc::VideoRotation rotation)166   void SetRotation(webrtc::VideoRotation rotation) {
167     rotation_ = rotation;
168   }
169 
GetRotation()170   webrtc::VideoRotation GetRotation() { return rotation_; }
171 
172  private:
173   bool running_;
174   int64_t initial_unix_timestamp_;
175   int64_t next_timestamp_;
176   bool is_screencast_;
177   webrtc::VideoRotation rotation_;
178 };
179 
180 }  // namespace cricket
181 
182 #endif  // TALK_MEDIA_BASE_FAKEVIDEOCAPTURER_H_
183