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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Copyright (C) 2013 Matthias P. Braendli
http://mpb.li
SIMUL throttling output. It guarantees correct frame generation rate
*/
/*
This file is part of CRC-DabMux.
CRC-DabMux is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
CRC-DabMux 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with CRC-DabMux. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dabOutput.h"
#include <cstring>
#include <cstdio>
#include <fcntl.h>
#include <limits.h>
#ifdef _WIN32
# include <io.h>
# ifdef __MINGW32__
# define FS_DECLARE_CFG_ARRAYS
# include <winioctl.h>
# endif
# include <sdci.h>
#else
# include <unistd.h>
# include <sys/time.h>
# ifndef O_BINARY
# define O_BINARY 0
# endif // O_BINARY
#endif
int DabOutputSimul::Open(const char* name)
{
#ifdef _WIN32
startTime_ = GetTickCount();
#else
gettimeofday(&startTime_, NULL);
#endif
return 0;
}
int DabOutputSimul::Write(void* buffer, int size)
{
unsigned long current;
unsigned long start;
unsigned long waiting;
#ifdef _WIN32
current = GetTickCount();
start = this->startTime_;
if (current < start) {
waiting = start - current + 24;
Sleep(waiting);
} else {
waiting = 24 - (current - start);
if ((current - start) < 24) {
Sleep(waiting);
}
}
this->startTime_ += 24;
#else
timeval curTime;
gettimeofday(&curTime, NULL);
current = (1000000ul * curTime.tv_sec) + curTime.tv_usec;
start = (1000000ul * this->startTime_.tv_sec) + this->startTime_.tv_usec;
waiting = 24000ul - (current - start);
if ((current - start) < 24000ul) {
usleep(waiting);
}
this->startTime_.tv_usec += 24000;
if (this->startTime_.tv_usec >= 1000000) {
this->startTime_.tv_usec -= 1000000;
++this->startTime_.tv_sec;
}
#endif
return size;
}
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