OpenShot Library | libopenshot  0.2.6
VideoPlaybackThread.cpp
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1 /**
2  * @file
3  * @brief Source file for VideoPlaybackThread class
4  * @author Duzy Chan <code@duzy.info>
5  * @author Jonathan Thomas <jonathan@openshot.org>
6  *
7  * @ref License
8  */
9 
10 /* LICENSE
11  *
12  * Copyright (c) 2008-2019 OpenShot Studios, LLC
13  * <http://www.openshotstudios.com/>. This file is part of
14  * OpenShot Library (libopenshot), an open-source project dedicated to
15  * delivering high quality video editing and animation solutions to the
16  * world. For more information visit <http://www.openshot.org/>.
17  *
18  * OpenShot Library (libopenshot) is free software: you can redistribute it
19  * and/or modify it under the terms of the GNU Lesser General Public License
20  * as published by the Free Software Foundation, either version 3 of the
21  * License, or (at your option) any later version.
22  *
23  * OpenShot Library (libopenshot) is distributed in the hope that it will be
24  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26  * GNU Lesser General Public License for more details.
27  *
28  * You should have received a copy of the GNU Lesser General Public License
29  * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
30  */
31 
32 #include "VideoPlaybackThread.h"
33 
34 namespace openshot
35 {
36  // Constructor
37  VideoPlaybackThread::VideoPlaybackThread(RendererBase *rb)
38  : Thread("video-playback"), renderer(rb)
39  , render(), reset(false)
40  {
41  }
42 
43  // Destructor
44  VideoPlaybackThread::~VideoPlaybackThread()
45  {
46  }
47 
48  // Get the currently playing frame number (if any)
49  int64_t VideoPlaybackThread::getCurrentFramePosition()
50  {
51  if (frame)
52  return frame->number;
53  else
54  return 0;
55  }
56 
57  // Start the thread
58  void VideoPlaybackThread::run()
59  {
60  while (!threadShouldExit()) {
61  // Make other threads wait on the render event
62  bool need_render = render.wait(500);
63 
64  if (need_render && frame)
65  {
66  // Debug
67  ZmqLogger::Instance()->AppendDebugMethod("VideoPlaybackThread::run (before render)", "frame->number", frame->number, "need_render", need_render);
68 
69  // Render the frame to the screen
70  renderer->paint(frame);
71  }
72 
73  // Signal to other threads that the rendered event has completed
74  rendered.signal();
75  }
76 
77  return;
78  }
79 }
std::shared_ptr< Frame > frame
void AppendDebugMethod(std::string method_name, std::string arg1_name="", float arg1_value=-1.0, std::string arg2_name="", float arg2_value=-1.0, std::string arg3_name="", float arg3_value=-1.0, std::string arg4_name="", float arg4_value=-1.0, std::string arg5_name="", float arg5_value=-1.0, std::string arg6_name="", float arg6_value=-1.0)
Append debug information.
Definition: ZmqLogger.cpp:190
Source file for VideoPlaybackThread class.
static ZmqLogger * Instance()
Create or get an instance of this logger singleton (invoke the class with this method) ...
Definition: ZmqLogger.cpp:52
This namespace is the default namespace for all code in the openshot library.
Definition: Compressor.h:46