mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-23 10:11:08 +00:00
Code Issues 1 Projects Releases Wiki Activity

basesrc: handle DTS and PTS

Browse source 
Use DTS and PTS of the subclass.
Calculate PTS from DTS on keyframes.
This commit is contained in:
Wim Taymans 2012-06-28 09:36:34 +02:00
parent 2506dc5fe2
commit d7fdf75e13
1 changed files with 41 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

66
libs/gst/base/gstbasesrc.c
View file

@ -2025,7 +2025,7 @@ gst_base_src_do_sync (GstBaseSrc * basesrc, GstBuffer * buffer)
GstBaseSrcClass *bclass;
GstClockTime base_time;
GstClock *clock;
GstClockTime now = GST_CLOCK_TIME_NONE, timestamp;
GstClockTime now = GST_CLOCK_TIME_NONE, pts, dts, timestamp;
gboolean do_timestamp, first, pseudo_live, is_live;
bclass = GST_BASE_SRC_GET_CLASS (basesrc);
@ -2035,7 +2035,13 @@ gst_base_src_do_sync (GstBaseSrc * basesrc, GstBuffer * buffer)
bclass->get_times (basesrc, buffer, &start, &end);
/* get buffer timestamp */
timestamp = GST_BUFFER_TIMESTAMP (buffer);
dts = GST_BUFFER_DTS (buffer);
pts = GST_BUFFER_PTS (buffer);
if (GST_CLOCK_TIME_IS_VALID (dts))
timestamp = dts;
else
timestamp = pts;
/* grab the lock to prepare for clocking and calculate the startup
* latency. */
@ -2094,9 +2100,9 @@ gst_base_src_do_sync (GstBaseSrc * basesrc, GstBuffer * buffer)
running_time = now - base_time;
GST_LOG_OBJECT (basesrc,
"startup timestamp: %" GST_TIME_FORMAT ", running_time %"
GST_TIME_FORMAT, GST_TIME_ARGS (timestamp),
GST_TIME_ARGS (running_time));
"startup PTS: %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT
", running_time %" GST_TIME_FORMAT, GST_TIME_ARGS (pts),
GST_TIME_ARGS (dts), GST_TIME_ARGS (running_time));
if (pseudo_live && timestamp != -1) {
/* live source and we need to sync, add startup latency to all timestamps
@ -2111,40 +2117,50 @@ gst_base_src_do_sync (GstBaseSrc * basesrc, GstBuffer * buffer)
GST_LOG_OBJECT (basesrc, "no timestamp offset needed");
}
if (!GST_CLOCK_TIME_IS_VALID (timestamp)) {
if (do_timestamp)
timestamp = running_time;
else
timestamp = 0;
if (!GST_CLOCK_TIME_IS_VALID (dts)) {
if (do_timestamp) {
dts = running_time;
} else {
dts = 0;
}
GST_BUFFER_DTS (buffer) = dts;
GST_BUFFER_TIMESTAMP (buffer) = timestamp;
GST_LOG_OBJECT (basesrc, "created timestamp: %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
GST_LOG_OBJECT (basesrc, "created DTS %" GST_TIME_FORMAT,
GST_TIME_ARGS (dts));
}
/* add the timestamp offset we need for sync */
timestamp += basesrc->priv->ts_offset;
} else {
/* not the first buffer, the timestamp is the diff between the clock and
* base_time */
if (do_timestamp && !GST_CLOCK_TIME_IS_VALID (timestamp)) {
if (do_timestamp && !GST_CLOCK_TIME_IS_VALID (dts)) {
now = gst_clock_get_time (clock);
GST_BUFFER_TIMESTAMP (buffer) = now - base_time;
dts = now - base_time;
GST_BUFFER_DTS (buffer) = dts;
GST_LOG_OBJECT (basesrc, "created timestamp: %" GST_TIME_FORMAT,
GST_TIME_ARGS (now - base_time));
GST_LOG_OBJECT (basesrc, "created DTS %" GST_TIME_FORMAT,
GST_TIME_ARGS (dts));
}
}
if (!GST_CLOCK_TIME_IS_VALID (pts)) {
if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
pts = dts;
GST_BUFFER_PTS (buffer) = dts;
GST_LOG_OBJECT (basesrc, "created PTS %" GST_TIME_FORMAT,
GST_TIME_ARGS (pts));
}
/* if we don't have a buffer timestamp, we don't sync */
if (!GST_CLOCK_TIME_IS_VALID (start))
goto no_sync;
if (is_live && GST_CLOCK_TIME_IS_VALID (timestamp)) {
if (is_live) {
/* for pseudo live sources, add our ts_offset to the timestamp */
GST_BUFFER_TIMESTAMP (buffer) += basesrc->priv->ts_offset;
if (GST_CLOCK_TIME_IS_VALID (pts))
GST_BUFFER_PTS (buffer) += basesrc->priv->ts_offset;
if (GST_CLOCK_TIME_IS_VALID (dts))
GST_BUFFER_DTS (buffer) += basesrc->priv->ts_offset;
start += basesrc->priv->ts_offset;
}
@ -2329,10 +2345,10 @@ again:
/* no timestamp set and we are at offset 0, we can timestamp with 0 */
if (offset == 0 && src->segment.time == 0
&& GST_BUFFER_TIMESTAMP (res_buf) == -1 && !src->is_live) {
&& GST_BUFFER_DTS (res_buf) == -1 && !src->is_live) {
GST_DEBUG_OBJECT (src, "setting first timestamp to 0");
res_buf = gst_buffer_make_writable (res_buf);
GST_BUFFER_TIMESTAMP (res_buf) = 0;
GST_BUFFER_DTS (res_buf) = 0;
}
/* now sync before pushing the buffer */