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/*
* time_pts.c: Adjustable clock in PTS units
*
* See the main source file 'xineliboutput.c' for copyright information and
* how to reach the author.
*
* $Id: time_pts.c,v 1.4 2008-04-28 20:48:05 phintuka Exp $
*
*/
#define __STDC_FORMAT_MACROS
#define __STDC_CONSTANT_MACROS
#include <inttypes.h>
#include <time.h>
#include <vdr/config.h>
#include "../logdefs.h" // logging
#include "time_pts.h"
#define MAX_SCR ((int64_t)0x1ffffffffLL)
#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
#else
# warning Posix monotonic clock not available
#endif
int cTimePts::m_Monotonic = -1;
void cTimePts::Init(void)
{
#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
if(m_Monotonic >= 0)
return;
m_Monotonic = 0;
struct timespec resolution;
if(clock_getres(CLOCK_MONOTONIC, &resolution)) {
LOGERR("cTimePts: clock_getres(CLOCK_MONOTONIC) failed");
return;
}
LOGDBG("cTimePts: clock_gettime(CLOCK_MONOTONIC): clock resolution %d us",
((int)resolution.tv_nsec) / 1000);
if( resolution.tv_sec == 0 && resolution.tv_nsec <= 1000000 ) {
struct timespec tp;
if(clock_gettime(CLOCK_MONOTONIC, &tp)) {
LOGERR("cTimePts: clock_gettime(CLOCK_MONOTONIC) failed");
} else {
LOGDBG("cTimePts: using monotonic clock");
m_Monotonic = 1;
}
}
#endif
}
cTimePts::cTimePts(void)
{
m_Paused = false;
m_ScrSpeed = 90000;
m_Multiplier = 90000;
Init();
Set();
}
int64_t cTimePts::Now(void) const
{
if(m_Paused)
return begin;
struct timeval t;
#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
if(m_Monotonic) {
struct timespec tp;
if(clock_gettime(CLOCK_MONOTONIC, &tp)) {
LOGERR("cTimePts: clock_gettime(CLOCK_MONOTONIC) failed");
return -1;
}
t.tv_sec = tp.tv_sec;
t.tv_usec = tp.tv_nsec/1000;
} else if (gettimeofday(&t, NULL)) {
LOGERR("cTimePts: gettimeofday() failed");
return -1;
}
#else
if (gettimeofday(&t, NULL)) {
LOGERR("cTimePts: gettimeofday() failed");
return -1;
}
#endif
t.tv_sec -= tbegin.tv_sec;
if(t.tv_usec < tbegin.tv_usec) {
t.tv_sec--;
t.tv_usec += 1000000;
}
t.tv_usec -= tbegin.tv_usec;
int64_t pts = 0;
pts += (int64_t)t.tv_sec * (int64_t)m_ScrSpeed;
pts += (int64_t)t.tv_usec * (int64_t)m_ScrSpeed / INT64_C(1000000);
if(m_Multiplier != 90000)
pts = pts * m_Multiplier / INT64_C(90000);
return ( pts + begin ) & MAX_SCR;
}
void cTimePts::Set(int64_t Pts)
{
begin = Pts;
#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
if(m_Monotonic) {
struct timespec tp;
if(!clock_gettime(CLOCK_MONOTONIC, &tp)) {
tbegin.tv_sec = tp.tv_sec;
tbegin.tv_usec = tp.tv_nsec/1000;
return;
}
LOGERR("cTimePts: clock_gettime(CLOCL_MONOTONIC) failed");
m_Monotonic = 0;
}
#endif
gettimeofday(&tbegin, NULL);
}
void cTimePts::Pause(void)
{
Set(Now());
m_Paused = true;
}
void cTimePts::Resume(void)
{
if(m_Paused) {
Set(begin);
m_Paused = false;
}
}
void cTimePts::TrickSpeed(const int Multiplier)
{
Set(Now());
if(Multiplier < 0)
m_Multiplier = 90000 * (-Multiplier);
else if(Multiplier > 0)
m_Multiplier = 90000 / Multiplier;
else
LOGERR("cTimePts::SetSpeed: Multiplier=%d", Multiplier);
}
void cTimePts::SetScrSpeed(const int ScrSpeed)
{
Set(Now());
m_ScrSpeed = ScrSpeed;
}
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