You've already forked libopenshot
mirror of
https://github.com/OpenShot/libopenshot.git
synced 2026-03-02 08:53:52 -08:00
122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
/**
|
|
* @file
|
|
* @brief Source file for VideoCacheThread class
|
|
* @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/VideoCacheThread.h"
|
|
|
|
namespace openshot
|
|
{
|
|
// Constructor
|
|
VideoCacheThread::VideoCacheThread()
|
|
: Thread("video-cache"), speed(1), is_playing(false), position(1)
|
|
, reader(NULL), max_frames(OPEN_MP_NUM_PROCESSORS * 2), current_display_frame(1)
|
|
{
|
|
}
|
|
|
|
// Destructor
|
|
VideoCacheThread::~VideoCacheThread()
|
|
{
|
|
}
|
|
|
|
// Get the currently playing frame number (if any)
|
|
int64_t VideoCacheThread::getCurrentFramePosition()
|
|
{
|
|
if (frame)
|
|
return frame->number;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
// Set the currently playing frame number (if any)
|
|
void VideoCacheThread::setCurrentFramePosition(int64_t current_frame_number)
|
|
{
|
|
current_display_frame = current_frame_number;
|
|
}
|
|
|
|
// Seek the reader to a particular frame number
|
|
void VideoCacheThread::Seek(int64_t new_position)
|
|
{
|
|
position = new_position;
|
|
}
|
|
|
|
// Play the video
|
|
void VideoCacheThread::Play() {
|
|
// Start playing
|
|
is_playing = true;
|
|
}
|
|
|
|
// Stop the audio
|
|
void VideoCacheThread::Stop() {
|
|
// Stop playing
|
|
is_playing = false;
|
|
}
|
|
|
|
// Start the thread
|
|
void VideoCacheThread::run()
|
|
{
|
|
while (!threadShouldExit() && is_playing) {
|
|
|
|
// Calculate sleep time for frame rate
|
|
double frame_time = (1000.0 / reader->info.fps.ToDouble());
|
|
|
|
// Cache frames before the other threads need them
|
|
// Cache frames up to the max frames
|
|
while (speed == 1 && (position - current_display_frame) < max_frames)
|
|
{
|
|
// Only cache up till the max_frames amount... then sleep
|
|
try
|
|
{
|
|
if (reader) {
|
|
ZmqLogger::Instance()->AppendDebugMethod("VideoCacheThread::run (cache frame)", "position", position, "current_display_frame", current_display_frame, "max_frames", max_frames, "needed_frames", (position - current_display_frame), "", -1, "", -1);
|
|
|
|
// Force the frame to be generated
|
|
reader->GetFrame(position);
|
|
}
|
|
|
|
}
|
|
catch (const OutOfBoundsFrame & e)
|
|
{
|
|
// Ignore out of bounds frame exceptions
|
|
}
|
|
|
|
// Is cache position behind current display frame?
|
|
if (position < current_display_frame) {
|
|
// Jump ahead
|
|
position = current_display_frame;
|
|
}
|
|
|
|
// Increment frame number
|
|
position++;
|
|
}
|
|
|
|
// Sleep for 1 frame length
|
|
usleep(frame_time * 1000);
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|