File indexing completed on 2024-06-16 04:38:28

 /*
     SPDX-FileCopyrightText: 2003 Fabrice Bellard
     SPDX-FileCopyrightText: 2020-2022 Mladen Milinkovic <max@smoothware.net>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "clock.h"
 
 #include <cmath>
 
 extern "C" {
 #include "libavutil/time.h"
 #include "libavutil/avutil.h"
 }
 
 #include "videoplayer/backend/packetqueue.h"
 
 using namespace SubtitleComposer;
 
 Clock::Clock()
     : m_pts(0.),
       m_ptsDrift(0.),
       m_lastUpdated(0.),
       m_speed(0.),
       m_serial(0),
       m_paused(false),
       m_queueSerial(nullptr)
 {
 
 }
 
 double
 Clock::get() const
 {
     if(*m_queueSerial != m_serial)
         return NAN;
     if(m_paused) {
         return m_pts;
     } else {
         double time = av_gettime_relative() / double(AV_TIME_BASE);
         return m_ptsDrift + time - (time - m_lastUpdated) * (1.0 - m_speed);
     }
 }
 
 void
 Clock::setAt(double pts, int serial, double time)
 {
     m_pts = pts;
     m_lastUpdated = time;
     m_ptsDrift = m_pts - time;
     m_serial = serial;
 }
 
 void
 Clock::set(double pts, int serial)
 {
     double time = av_gettime_relative() / double(AV_TIME_BASE);
     setAt(pts, serial, time);
 }
 
 void
 Clock::setSpeed(double speed)
 {
     set(get(), m_serial);
     m_speed = speed;
 }
 
 void
 Clock::init(const PacketQueue *queue)
 {
     m_speed = 1.0;
     m_paused = 0;
     m_queueSerial = queue == nullptr ? &m_serial : &queue->m_serial;
     set(NAN, -1);
 }
 
 void
 Clock::syncTo(Clock *other)
 {
     double clock = get();
     double otherClock = other->get();
     if(!std::isnan(otherClock) && (std::isnan(clock) || fabs(clock - otherClock) > AV_NOSYNC_THRESHOLD))
         set(otherClock, other->m_serial);
 }