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
43namespace cricket {
44
45// Fake video capturer that allows the test to manually pump in frames.
46class FakeVideoCapturer : public cricket::VideoCapturer {
47 public:
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  }
71  ~FakeVideoCapturer() {
72    SignalDestroyed(this);
73  }
74
75  void ResetSupportedFormats(const std::vector<cricket::VideoFormat>& formats) {
76    SetSupportedFormats(formats);
77  }
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  }
87  bool CaptureCustomFrame(int width, int height, uint32_t fourcc) {
88    // default to 30fps
89    return CaptureCustomFrame(width, height, 33333333, fourcc);
90  }
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
135  void SignalCapturedFrame(cricket::CapturedFrame* frame) {
136    SignalFrameCaptured(this, frame);
137  }
138
139  sigslot::signal1<FakeVideoCapturer*> SignalDestroyed;
140
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  }
150  virtual void Stop() {
151    running_ = false;
152    SetCaptureFormat(NULL);
153    SetCaptureState(cricket::CS_STOPPED);
154  }
155  virtual bool IsRunning() { return running_; }
156  void SetScreencast(bool is_screencast) {
157    is_screencast_ = is_screencast;
158  }
159  virtual bool IsScreencast() const { return is_screencast_; }
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
166  void SetRotation(webrtc::VideoRotation rotation) {
167    rotation_ = rotation;
168  }
169
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