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#ifdef HAVE_WEBRTC_VIDEO
54    set_frame_factory(new cricket::WebRtcVideoFrameFactory());
55#endif
56    // Default supported formats. Use ResetSupportedFormats to over write.
57    std::vector<cricket::VideoFormat> formats;
58    formats.push_back(cricket::VideoFormat(1280, 720,
59        cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
60    formats.push_back(cricket::VideoFormat(640, 480,
61        cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
62    formats.push_back(cricket::VideoFormat(320, 240,
63        cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
64    formats.push_back(cricket::VideoFormat(160, 120,
65        cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
66    ResetSupportedFormats(formats);
67  }
68  ~FakeVideoCapturer() {
69    SignalDestroyed(this);
70  }
71
72  void ResetSupportedFormats(const std::vector<cricket::VideoFormat>& formats) {
73    SetSupportedFormats(formats);
74  }
75  bool CaptureFrame() {
76    if (!GetCaptureFormat()) {
77      return false;
78    }
79    return CaptureCustomFrame(GetCaptureFormat()->width,
80                              GetCaptureFormat()->height,
81                              GetCaptureFormat()->fourcc);
82  }
83  bool CaptureCustomFrame(int width, int height, uint32 fourcc) {
84    if (!running_) {
85      return false;
86    }
87    // Currently, |fourcc| is always I420 or ARGB.
88    // TODO(fbarchard): Extend SizeOf to take fourcc.
89    uint32 size = 0u;
90    if (fourcc == cricket::FOURCC_ARGB) {
91      size = width * 4 * height;
92    } else if (fourcc == cricket::FOURCC_I420) {
93      size = static_cast<uint32>(cricket::VideoFrame::SizeOf(width, height));
94    } else {
95      return false;  // Unsupported FOURCC.
96    }
97    if (size == 0u) {
98      return false;  // Width and/or Height were zero.
99    }
100
101    cricket::CapturedFrame frame;
102    frame.width = width;
103    frame.height = height;
104    frame.fourcc = fourcc;
105    frame.data_size = size;
106    frame.elapsed_time = next_timestamp_;
107    frame.time_stamp = initial_unix_timestamp_ + next_timestamp_;
108    next_timestamp_ += 33333333;  // 30 fps
109
110    rtc::scoped_ptr<char[]> data(new char[size]);
111    frame.data = data.get();
112    // Copy something non-zero into the buffer so Validate wont complain that
113    // the frame is all duplicate.
114    memset(frame.data, 1, size / 2);
115    memset(reinterpret_cast<uint8*>(frame.data) + (size / 2), 2,
116         size - (size / 2));
117    memcpy(frame.data, reinterpret_cast<const uint8*>(&fourcc), 4);
118    // TODO(zhurunz): SignalFrameCaptured carry returned value to be able to
119    // capture results from downstream.
120    SignalFrameCaptured(this, &frame);
121    return true;
122  }
123
124  sigslot::signal1<FakeVideoCapturer*> SignalDestroyed;
125
126  virtual cricket::CaptureState Start(const cricket::VideoFormat& format) {
127    cricket::VideoFormat supported;
128    if (GetBestCaptureFormat(format, &supported)) {
129      SetCaptureFormat(&supported);
130    }
131    running_ = true;
132    SetCaptureState(cricket::CS_RUNNING);
133    return cricket::CS_RUNNING;
134  }
135  virtual void Stop() {
136    running_ = false;
137    SetCaptureFormat(NULL);
138    SetCaptureState(cricket::CS_STOPPED);
139  }
140  virtual bool IsRunning() { return running_; }
141  void SetScreencast(bool is_screencast) {
142    is_screencast_ = is_screencast;
143  }
144  virtual bool IsScreencast() const { return is_screencast_; }
145  bool GetPreferredFourccs(std::vector<uint32>* fourccs) {
146    fourccs->push_back(cricket::FOURCC_I420);
147    fourccs->push_back(cricket::FOURCC_MJPG);
148    return true;
149  }
150
151 private:
152  bool running_;
153  int64 initial_unix_timestamp_;
154  int64 next_timestamp_;
155  bool is_screencast_;
156};
157
158}  // namespace cricket
159
160#endif  // TALK_MEDIA_BASE_FAKEVIDEOCAPTURER_H_
161