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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* dvfile.cc
*
* Thu Jul 28 17:30:48 CEST 2005
* Copyright 2005 Bent Bisballe
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of MIaV.
*
* MIaV 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 2 of the License, or
* (at your option) any later version.
*
* MIaV 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 MIaV; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "dvfile.h"
#include "dv.h"
#include "util.h"
#include "info.h"
#include <sys/time.h>
dvfile::dvfile()
{
fp = fopen(TEST_MOVIE, "r");
if(!fp) MIaV::info->error("Couldn't open %s for reading.", TEST_MOVIE);
}
dvfile::~dvfile()
{
fclose(fp);
}
Frame *dvfile::readFrame()
{
timeval tv;
// Wait untill atleast 1/25th of a second has passed in order to
// preserve 25fps when enough cpu is available
gettimeofday(&tv, NULL);
long long unsigned int diff =
tv.tv_sec * 1000000LL +
tv.tv_usec - last_frame;
if(diff < (1000000 / 25)) usleep((1000000 / 25) - diff);
unsigned char *ptr = new unsigned char[DVPACKAGE_SIZE];
if(fp) {
while(fread(ptr, DVPACKAGE_SIZE, 1, fp) == 0) {
fseek(fp, 0L, SEEK_SET);
}
} else {
memset(ptr, 0, sizeof(ptr));
}
Frame *frame = new Frame((char*)ptr, DVPACKAGE_SIZE, VF_DV, NULL, 0, AF_DV);
gettimeofday(&tv, NULL);
last_frame = tv.tv_sec * 1000000LL + tv.tv_usec;
return frame;
}
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