/*
* Output packet
*/
static int _timeshift_read
( timeshift_t *ts, timeshift_file_t **cur_file, off_t *cur_off, int *fd,
streaming_message_t **sm, int *wait )
{
if (*cur_file) {
/* Open file */
if (*fd == -1) {
tvhtrace("timeshift", "ts %d open file %s",
ts->id, (*cur_file)->path);
*fd = open((*cur_file)->path, O_RDONLY);
}
tvhtrace("timeshift", "ts %d seek to %"PRIoff_t, ts->id, *cur_off);
lseek(*fd, *cur_off, SEEK_SET);
/* Read msg */
ssize_t r = _read_msg(*fd, sm);
if (r < 0) {
streaming_message_t *e = streaming_msg_create_code(SMT_STOP, SM_CODE_UNDEFINED_ERROR);
streaming_target_deliver2(ts->output, e);
tvhlog(LOG_ERR, "timeshift", "ts %d could not read buffer", ts->id);
return -1;
}
tvhtrace("timeshift", "ts %d read msg %p (%"PRIssize_t")",
ts->id, *sm, r);
/* Incomplete */
if (r == 0) {
lseek(*fd, *cur_off, SEEK_SET);
return 0;
}
/* Update */
*cur_off += r;
/* Special case - EOF */
if (r == sizeof(size_t) || *cur_off > (*cur_file)->size) {
close(*fd);
*fd = -1;
pthread_mutex_lock(&ts->rdwr_mutex);
*cur_file = timeshift_filemgr_next(*cur_file, NULL, 0);
pthread_mutex_unlock(&ts->rdwr_mutex);
*cur_off = 0; // reset
*wait = 0;
/* Check SMT_START index */
} else {
streaming_message_t *ssm = _timeshift_find_sstart(*cur_file, (*sm)->sm_time);
if (ssm && ssm->sm_data != ts->smt_start) {
streaming_target_deliver2(ts->output, streaming_msg_clone(ssm));
if (ts->smt_start)
streaming_start_unref(ts->smt_start);
ts->smt_start = ssm->sm_data;
atomic_add(&ts->smt_start->ss_refcount, 1);
}
}
}
return 0;
}
/*
* Output packet
*/
static int _timeshift_read
( timeshift_t *ts, timeshift_file_t **cur_file,
streaming_message_t **sm, int *wait )
{
timeshift_file_t *tsf = *cur_file;
ssize_t r;
off_t off, ooff;
if (tsf) {
/* Open file */
if (tsf->rfd < 0 && !tsf->ram) {
tsf->rfd = open(tsf->path, O_RDONLY);
tvhtrace("timeshift", "ts %d open file %s (fd %i)", ts->id, tsf->path, tsf->rfd);
if (tsf->rfd < 0)
return -1;
}
if (tsf->rfd >= 0)
if ((off = lseek(tsf->rfd, tsf->roff, SEEK_SET)) != tsf->roff)
tvherror("timeshift", "ts %d seek to %s failed (off %"PRId64" != %"PRId64"): %s",
ts->id, tsf->path, (int64_t)tsf->roff, (int64_t)off, strerror(errno));
/* Read msg */
ooff = tsf->roff;
r = _read_msg(tsf, -1, sm);
if (r < 0) {
streaming_message_t *e = streaming_msg_create_code(SMT_STOP, SM_CODE_UNDEFINED_ERROR);
streaming_target_deliver2(ts->output, e);
tvhtrace("timeshift", "ts %d seek to %jd (fd %i)", ts->id, (intmax_t)tsf->roff, tsf->rfd);
tvhlog(LOG_ERR, "timeshift", "ts %d could not read buffer", ts->id);
return -1;
}
tvhtrace("timeshift", "ts %d seek to %jd (fd %i) read msg %p (%"PRId64")", ts->id, (intmax_t)tsf->roff, tsf->rfd, *sm, (int64_t)r);
/* Incomplete */
if (r == 0) {
if (tsf->rfd >= 0) {
tvhtrace("timeshift", "ts %d seek to %jd (fd %i) (incomplete)", ts->id, (intmax_t)tsf->roff, tsf->rfd);
if ((off = lseek(tsf->rfd, ooff, SEEK_SET)) != ooff)
tvherror("timeshift", "seek to %s failed (off %"PRId64" != %"PRId64"): %s",
tsf->path, (int64_t)ooff, (int64_t)off, strerror(errno));
}
tsf->roff = ooff;
return 0;
}
/* Special case - EOF */
if (r == sizeof(size_t) || tsf->roff > tsf->size) {
if (tsf->rfd >= 0)
close(tsf->rfd);
tsf->rfd = -1;
pthread_mutex_lock(&ts->rdwr_mutex);
*cur_file = timeshift_filemgr_next(tsf, NULL, 0);
pthread_mutex_unlock(&ts->rdwr_mutex);
tsf->roff = 0; // reset
*wait = 0;
/* Check SMT_START index */
} else {
streaming_message_t *ssm = _timeshift_find_sstart(*cur_file, (*sm)->sm_time);
if (ssm && ssm->sm_data != ts->smt_start) {
streaming_target_deliver2(ts->output, streaming_msg_clone(ssm));
if (ts->smt_start)
streaming_start_unref(ts->smt_start);
ts->smt_start = ssm->sm_data;
atomic_add(&ts->smt_start->ss_refcount, 1);
}
}
}
return 0;
}
