static void timeshift_status
( timeshift_t *ts, int64_t current_time )
{
streaming_message_t *tsm;
timeshift_status_t *status;
status = calloc(1, sizeof(timeshift_status_t));
timeshift_fill_status(ts, status, current_time);
tsm = streaming_msg_create_data(SMT_TIMESHIFT_STATUS, status);
streaming_target_deliver2(ts->output, tsm);
}
static ssize_t _read_msg ( timeshift_file_t *tsf, int fd, streaming_message_t **sm )
{
ssize_t r, cnt = 0;
size_t sz;
streaming_message_type_t type;
int64_t time;
void *data;
int code;
/* Clear */
*sm = NULL;
/* Size */
r = _read_buf(tsf, fd, &sz, sizeof(sz));
if (r < 0) return -1;
if (r != sizeof(sz)) return 0;
cnt += r;
/* EOF */
if (sz == 0) return cnt;
/* Wrong data size */
if (sz > 1024 * 1024) return -1;
/* Type */
r = _read_buf(tsf, fd, &type, sizeof(type));
if (r < 0) return -1;
if (r != sizeof(type)) return 0;
cnt += r;
/* Time */
r = _read_buf(tsf, fd, &time, sizeof(time));
if (r < 0) return -1;
if (r != sizeof(time)) return 0;
cnt += r;
/* Adjust size */
sz -= sizeof(type) + sizeof(time);
cnt += sz;
/* Standard messages */
switch (type) {
/* Unhandled */
case SMT_START:
case SMT_NOSTART:
case SMT_NOSTART_WARN:
case SMT_SERVICE_STATUS:
case SMT_DESCRAMBLE_INFO:
return -1;
break;
/* Code */
case SMT_STOP:
case SMT_EXIT:
case SMT_SPEED:
if (sz != sizeof(code)) return -1;
r = _read_buf(tsf, fd, &code, sz);
if (r != sz) {
if (r < 0) return -1;
return 0;
}
*sm = streaming_msg_create_code(type, code);
break;
/* Data */
case SMT_SKIP:
case SMT_SIGNAL_STATUS:
case SMT_MPEGTS:
case SMT_PACKET:
data = malloc(sz);
r = _read_buf(tsf, fd, data, sz);
if (r != sz) {
free(data);
if (r < 0) return -1;
return 0;
}
if (type == SMT_PACKET) {
th_pkt_t *pkt = data;
pkt->pkt_payload = pkt->pkt_meta = NULL;
pkt->pkt_refcount = 0;
*sm = streaming_msg_create_pkt(pkt);
r = _read_pktbuf(tsf, fd, &pkt->pkt_meta);
if (r < 0) {
streaming_msg_free(*sm);
return r;
}
cnt += r;
r = _read_pktbuf(tsf, fd, &pkt->pkt_payload);
if (r < 0) {
streaming_msg_free(*sm);
return r;
}
cnt += r;
} else {
*sm = streaming_msg_create_data(type, data);
}
(*sm)->sm_time = time;
break;
default:
return -1;
}
/* OK */
return cnt;
}
/*
* Timeshift thread
*/
void *timeshift_reader ( void *p )
{
timeshift_t *ts = p;
int nfds, end, run = 1, wait = -1;
timeshift_file_t *cur_file = NULL;
int cur_speed = 100, keyframe_mode = 0;
int64_t pause_time = 0, play_time = 0, last_time = 0;
int64_t now, deliver, skip_time = 0;
streaming_message_t *sm = NULL, *ctrl = NULL;
timeshift_index_iframe_t *tsi = NULL;
streaming_skip_t *skip = NULL;
time_t last_status = 0;
tvhpoll_t *pd;
tvhpoll_event_t ev = { 0 };
pd = tvhpoll_create(1);
ev.fd = ts->rd_pipe.rd;
ev.events = TVHPOLL_IN;
tvhpoll_add(pd, &ev, 1);
/* Output */
while (run) {
// Note: Previously we allowed unlimited wait, but we now must wake periodically
// to output status message
if (wait < 0 || wait > 1000)
wait = 1000;
/* Wait for data */
if(wait)
nfds = tvhpoll_wait(pd, &ev, 1, wait);
else
nfds = 0;
wait = -1;
end = 0;
skip = NULL;
now = getmonoclock();
/* Control */
pthread_mutex_lock(&ts->state_mutex);
if (nfds == 1) {
if (_read_msg(NULL, ts->rd_pipe.rd, &ctrl) > 0) {
/* Exit */
if (ctrl->sm_type == SMT_EXIT) {
tvhtrace("timeshift", "ts %d read exit request", ts->id);
run = 0;
streaming_msg_free(ctrl);
ctrl = NULL;
/* Speed */
} else if (ctrl->sm_type == SMT_SPEED) {
int speed = ctrl->sm_code;
int keyframe;
/* Bound it */
if (speed > 3200) speed = 3200;
if (speed < -3200) speed = -3200;
/* Ignore negative */
if (ts->ondemand && (speed < 0))
speed = cur_file ? speed : 0;
/* Process */
if (cur_speed != speed) {
/* Live playback */
if (ts->state == TS_LIVE) {
/* Reject */
if (speed >= 100) {
tvhlog(LOG_DEBUG, "timeshift", "ts %d reject 1x+ in live mode",
ts->id);
speed = 100;
/* Set position */
} else {
tvhlog(LOG_DEBUG, "timeshift", "ts %d enter timeshift mode",
ts->id);
timeshift_writer_flush(ts);
pthread_mutex_lock(&ts->rdwr_mutex);
if ((cur_file = timeshift_filemgr_get(ts, 1))) {
cur_file->roff = cur_file->size;
pause_time = cur_file->last;
last_time = pause_time;
}
pthread_mutex_unlock(&ts->rdwr_mutex);
}
/* Buffer playback */
} else if (ts->state == TS_PLAY) {
pause_time = last_time;
/* Paused */
} else {
}
/* Check keyframe mode */
keyframe = (speed < 0) || (speed > 400);
if (keyframe != keyframe_mode) {
tvhlog(LOG_DEBUG, "timeshift", "using keyframe mode? %s",
keyframe ? "yes" : "no");
keyframe_mode = keyframe;
if (keyframe) {
tsi = NULL;
}
}
/* Update */
play_time = getmonoclock();
cur_speed = speed;
if (speed != 100 || ts->state != TS_LIVE)
ts->state = speed == 0 ? TS_PAUSE : TS_PLAY;
tvhlog(LOG_DEBUG, "timeshift", "ts %d change speed %d",
ts->id, speed);
}
/* Send on the message */
ctrl->sm_code = speed;
streaming_target_deliver2(ts->output, ctrl);
ctrl = NULL;
/* Skip/Seek */
} else if (ctrl->sm_type == SMT_SKIP) {
skip = ctrl->sm_data;
switch (skip->type) {
case SMT_SKIP_LIVE:
if (ts->state != TS_LIVE) {
/* Reset */
if (ts->full) {
pthread_mutex_lock(&ts->rdwr_mutex);
timeshift_filemgr_flush(ts, NULL);
ts->full = 0;
pthread_mutex_unlock(&ts->rdwr_mutex);
}
/* Release */
if (sm)
streaming_msg_free(sm);
/* Find end */
skip_time = 0x7fffffffffffffffLL;
// TODO: change this sometime!
}
break;
case SMT_SKIP_ABS_TIME:
if (ts->pts_delta == 0) {
tvhlog(LOG_ERR, "timeshift", "ts %d abs skip not possible no PTS delta", ts->id);
skip = NULL;
break;
}
/* -fallthrough */
case SMT_SKIP_REL_TIME:
/* Convert */
skip_time = ts_rescale(skip->time, 1000000);
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip %"PRId64" requested %"PRId64, ts->id, skip_time, skip->time);
/* Live playback (stage1) */
if (ts->state == TS_LIVE) {
pthread_mutex_lock(&ts->rdwr_mutex);
if ((cur_file = timeshift_filemgr_get(ts, !ts->ondemand))) {
cur_file->roff = cur_file->size;
last_time = cur_file->last;
} else {
tvhlog(LOG_ERR, "timeshift", "ts %d failed to get current file", ts->id);
skip = NULL;
}
pthread_mutex_unlock(&ts->rdwr_mutex);
}
/* May have failed */
if (skip) {
skip_time += (skip->type == SMT_SKIP_ABS_TIME) ? ts->pts_delta : last_time;
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip last_time %"PRId64" pts_delta %"PRId64,
ts->id, skip_time - ts->pts_delta, ts->pts_delta);
/* Live (stage2) */
if (ts->state == TS_LIVE) {
if (skip_time >= now) {
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip ignored, already live", ts->id);
skip = NULL;
} else {
ts->state = TS_PLAY;
}
}
}
/* OK */
if (skip) {
/* Adjust time */
play_time = now;
pause_time = skip_time;
tsi = NULL;
/* Clear existing packet */
if (sm)
streaming_msg_free(sm);
sm = NULL;
}
break;
default:
tvhlog(LOG_ERR, "timeshift", "ts %d invalid/unsupported skip type: %d", ts->id, skip->type);
skip = NULL;
break;
}
/* Error */
if (!skip) {
((streaming_skip_t*)ctrl->sm_data)->type = SMT_SKIP_ERROR;
streaming_target_deliver2(ts->output, ctrl);
ctrl = NULL;
}
/* Ignore */
} else {
streaming_msg_free(ctrl);
ctrl = NULL;
}
}
}
/* Status message */
if (now >= (last_status + 1000000)) {
streaming_message_t *tsm;
timeshift_status_t *status;
timeshift_index_iframe_t *fst, *lst;
status = calloc(1, sizeof(timeshift_status_t));
fst = _timeshift_first_frame(ts);
lst = _timeshift_last_frame(ts);
status->full = ts->full;
status->shift = ts->state <= TS_LIVE ? 0 : ts_rescale_i(now - last_time, 1000000);
if (lst && fst && lst != fst && ts->pts_delta != PTS_UNSET) {
status->pts_start = ts_rescale_i(fst->time - ts->pts_delta, 1000000);
status->pts_end = ts_rescale_i(lst->time - ts->pts_delta, 1000000);
} else {
status->pts_start = PTS_UNSET;
status->pts_end = PTS_UNSET;
}
tsm = streaming_msg_create_data(SMT_TIMESHIFT_STATUS, status);
streaming_target_deliver2(ts->output, tsm);
last_status = now;
}
/* Done */
if (!run || !cur_file || ((ts->state != TS_PLAY && !skip))) {
pthread_mutex_unlock(&ts->state_mutex);
continue;
}
/* Calculate delivery time */
deliver = (now - play_time) + TIMESHIFT_PLAY_BUF;
deliver = (deliver * cur_speed) / 100;
deliver = (deliver + pause_time);
/* Determine next packet */
if (!sm) {
/* Rewind or Fast forward (i-frame only) */
if (skip || keyframe_mode) {
timeshift_file_t *tsf = NULL;
int64_t req_time;
/* Time */
if (!skip)
req_time = last_time + ((cur_speed < 0) ? -1 : 1);
else
req_time = skip_time;
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip to %"PRId64" from %"PRId64,
ts->id, req_time - ts->pts_delta, last_time - ts->pts_delta);
/* Find */
pthread_mutex_lock(&ts->rdwr_mutex);
end = _timeshift_skip(ts, req_time, last_time,
cur_file, &tsf, &tsi);
pthread_mutex_unlock(&ts->rdwr_mutex);
if (tsi)
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip found pkt @ %"PRId64,
ts->id, tsi->time - ts->pts_delta);
/* File changed (close) */
if ((tsf != cur_file) && cur_file && cur_file->rfd >= 0) {
close(cur_file->rfd);
cur_file->rfd = -1;
}
/* Position */
if (cur_file)
cur_file->refcount--;
if ((cur_file = tsf) != NULL) {
if (tsi)
cur_file->roff = tsi->pos;
else
cur_file->roff = 0;
}
}
/* Find packet */
if (_timeshift_read(ts, &cur_file, &sm, &wait) == -1) {
pthread_mutex_unlock(&ts->state_mutex);
break;
}
}
/* Send skip response */
if (skip) {
if (sm && sm->sm_type == SMT_PACKET) {
th_pkt_t *pkt = sm->sm_data;
skip->time = pkt->pkt_pts;
skip->type = SMT_SKIP_ABS_TIME;
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip to pts %"PRId64" ok, time %"PRId64,
ts->id, ts_rescale(skip->time, 1000000), sm->sm_time - ts->pts_delta);
} else {
/* Report error */
skip->type = SMT_SKIP_ERROR;
skip = NULL;
tvhlog(LOG_DEBUG, "timeshift", "ts %d skip failed (%d)", ts->id, sm ? sm->sm_type : -1);
}
streaming_target_deliver2(ts->output, ctrl);
ctrl = NULL;
}
/* Deliver */
if (sm && (skip ||
(((cur_speed < 0) && (sm->sm_time >= deliver)) ||
((cur_speed > 0) && (sm->sm_time <= deliver))))) {
if (sm->sm_type == SMT_PACKET && tvhtrace_enabled()) {
th_pkt_t *pkt = sm->sm_data;
tvhtrace("timeshift",
"ts %d pkt out - stream %d type %c pts %10"PRId64
" dts %10"PRId64 " dur %10d len %6zu time %14"PRItime_t,
ts->id,
pkt->pkt_componentindex,
pkt_frametype_to_char(pkt->pkt_frametype),
ts_rescale(pkt->pkt_pts, 1000000),
ts_rescale(pkt->pkt_dts, 1000000),
pkt->pkt_duration,
pktbuf_len(pkt->pkt_payload), sm->sm_time - ts->pts_delta);
}
last_time = sm->sm_time;
streaming_target_deliver2(ts->output, sm);
sm = NULL;
wait = 0;
} else if (sm) {
if (cur_speed > 0)
wait = (sm->sm_time - deliver) / 1000;
else
wait = (deliver - sm->sm_time) / 1000;
if (wait == 0) wait = 1;
tvhtrace("timeshift", "ts %d wait %d",
ts->id, wait);
}
/* Terminate */
if (!cur_file || end != 0) {
if (!end)
end = (cur_speed > 0) ? 1 : -1;
/* Back to live (unless buffer is full) */
if (end == 1 && !ts->full) {
tvhlog(LOG_DEBUG, "timeshift", "ts %d eob revert to live mode", ts->id);
ts->state = TS_LIVE;
cur_speed = 100;
ctrl = streaming_msg_create_code(SMT_SPEED, cur_speed);
streaming_target_deliver2(ts->output, ctrl);
ctrl = NULL;
/* Flush timeshift buffer to live */
if (_timeshift_flush_to_live(ts, &cur_file, &sm, &wait) == -1)
break;
/* Close file (if open) */
if (cur_file && cur_file->rfd >= 0) {
close(cur_file->rfd);
cur_file->rfd = -1;
}
/* Flush ALL files */
if (ts->ondemand)
timeshift_filemgr_flush(ts, NULL);
/* Pause */
} else {
if (cur_speed <= 0) {
cur_speed = 0;
ts->state = TS_PAUSE;
} else {
cur_speed = 100;
ts->state = TS_PLAY;
play_time = now;
}
tvhlog(LOG_DEBUG, "timeshift", "ts %d sob speed %d", ts->id, cur_speed);
pause_time = last_time;
ctrl = streaming_msg_create_code(SMT_SPEED, cur_speed);
streaming_target_deliver2(ts->output, ctrl);
ctrl = NULL;
}
/* Flush unwanted */
} else if (ts->ondemand && cur_file) {
pthread_mutex_lock(&ts->rdwr_mutex);
timeshift_filemgr_flush(ts, cur_file);
pthread_mutex_unlock(&ts->rdwr_mutex);
}
pthread_mutex_unlock(&ts->state_mutex);
}
/* Cleanup */
tvhpoll_destroy(pd);
if (cur_file && cur_file->rfd >= 0) {
close(cur_file->rfd);
cur_file->rfd = -1;
}
if (sm) streaming_msg_free(sm);
if (ctrl) streaming_msg_free(ctrl);
tvhtrace("timeshift", "ts %d exit reader thread", ts->id);
return NULL;
}
