VideoPlaybackThread.cpp

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/**
 * @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)
    int 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)
                {
                        // Render the frame to the screen
                        renderer->paint(frame);

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

        return;
    }
}