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Implemented realistic speed simulation with stdio-drives

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This commit is contained in:
Thomas Schmitt 2007-09-12 11:58:43 +00:00
parent bd24c8a60a
commit 1dd0c0623c
2 changed files with 33 additions and 1 deletions
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2
libburn/trunk/cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2007.09.12.115850"
#define Cdrskin_timestamP "2007.09.12.115946"

32
libburn/trunk/libburn/write.c
View File

@ -26,6 +26,7 @@
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "error.h"
#include "sector.h"
@ -1779,6 +1780,34 @@ void burn_stdio_mmc_sync_cache(struct burn_drive *d)
}
/* ts A70912 */
/* Enforces eventual nominal write speed.
@param flag bit0= initialize *prev_time */
int burn_stdio_slowdown(struct burn_drive *d, struct timeval *prev_time,
int amount, int flag)
{
struct timeval tnow;
struct timezone dummy_tz;
double to_wait;
if (flag & 1) {
gettimeofday(prev_time, &dummy_tz);
return 1;
}
if(d->nominal_write_speed <= 0)
return 2;
gettimeofday(&tnow, &dummy_tz);
to_wait = ( ((double) amount) / (double) d->nominal_write_speed ) -
(double) ( tnow.tv_sec - prev_time->tv_sec ) -
(double) ( tnow.tv_usec - prev_time->tv_usec ) / 1.0e6;
if (to_wait >= 0.0001) {
usleep((int) (to_wait * 1000000.0));
}
gettimeofday(prev_time, &dummy_tz);
return 1;
}
#endif /* Libburn_stdio_track_by_sector_datA */
@ -1793,6 +1822,7 @@ int burn_stdio_write_track(struct burn_write_opts *o, struct burn_session *s,
#ifdef Libburn_stdio_track_by_sector_datA
int i, prev_sync_sector = 0;
struct buffer *out = d->buffer;
struct timeval prev_time;
#else
int eof_seen = 0;
off_t t_size, w_count;
@ -1814,6 +1844,7 @@ int burn_stdio_write_track(struct burn_write_opts *o, struct burn_session *s,
d->write = burn_stdio_mmc_write;
d->sync_cache = burn_stdio_mmc_sync_cache;
burn_stdio_slowdown(d, &prev_time, 0, 1); /* initialize */
for (i = 0; open_ended || i < sectors; i++) {
/* transact a (CD sized) sector */
if (!sector_data(o, t, 0))
@ -1829,6 +1860,7 @@ int burn_stdio_write_track(struct burn_write_opts *o, struct burn_session *s,
prev_sync_sector = d->progress.sector;
if (!o->simulate)
burn_stdio_sync_cache(d, 1);
burn_stdio_slowdown(d, &prev_time, 512 * 2, 0);
}
}