libopenshot/src/Qt/VideoPlaybackThread.cpp

/**
 * @file
 * @brief Source file for VideoPlaybackThread class
 * @author Duzy Chan <code@duzy.info>
 * @author Jonathan Thomas <jonathan@openshot.org>
 *
 * @section LICENSE
 *
 * Copyright (c) 2008-2014 OpenShot Studios, LLC
 * <http://www.openshotstudios.com/>. This file is part of
 * OpenShot Library (libopenshot), an open-source project dedicated to
 * delivering high quality video editing and animation solutions to the
 * world. For more information visit <http://www.openshot.org/>.
 *
 * OpenShot Library (libopenshot) is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * OpenShot Library (libopenshot) is distributed in the hope that it will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
 */

#include "../../include/Qt/VideoPlaybackThread.h"

namespace openshot
{
	// Constructor
    VideoPlaybackThread::VideoPlaybackThread(RendererBase *rb)
	: Thread("video-playback"), renderer(rb)
	, render(), reset(false)
    {
    }

    // Destructor
    VideoPlaybackThread::~VideoPlaybackThread()
    {
    }

    // Get the currently playing frame number (if any)
    int64_t VideoPlaybackThread::getCurrentFramePosition()
    {
    	if (frame)
    		return frame->number;
    	else
    		return 0;
    }

    // Start the thread
    void VideoPlaybackThread::run()
    {
	while (!threadShouldExit()) {
	    // Make other threads wait on the render event
		bool need_render = render.wait(500);

		if (need_render && frame)
		{
			// Debug
			ZmqLogger::Instance()->AppendDebugMethod("VideoPlaybackThread::run (before render)", "frame->number", frame->number, "need_render", need_render, "", -1, "", -1, "", -1, "", -1);

			// Render the frame to the screen
			renderer->paint(frame);
		}

		// Signal to other threads that the rendered event has completed
		rendered.signal();
	}

	return;
    }
}