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Add beginnings of seeking.

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Parse the Range header and perform a seek on the pipeline for the requested
position. It's disabled currently until I figure out what's going wrong.
This commit is contained in:
Wim Taymans 2009-03-12 20:32:14 +01:00
parent 0ae095e825
commit 525d639cde
3 changed files with 149 additions and 34 deletions
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12
gst/rtsp-server/rtsp-client.c
View file

@ -471,6 +471,8 @@ handle_play_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *ses
guint n_streams, i;
guint timestamp, seqnum;
gchar *str;
GstRTSPTimeRange *range;
GstRTSPResult res;
if (!session)
goto no_session;
@ -485,6 +487,16 @@ handle_play_request (GstRTSPClient *client, GstRTSPUrl *uri, GstRTSPSession *ses
media->state != GST_RTSP_STATE_READY)
goto invalid_state;
/* parse the range header if we have one */
res = gst_rtsp_message_get_header (request, GST_RTSP_HDR_RANGE, &str, 0);
if (res == GST_RTSP_OK) {
if (gst_rtsp_range_parse (str, &range) == GST_RTSP_OK) {
/* we have a range, seek to the position */
gst_rtsp_media_seek (media->media, range);
gst_rtsp_range_free (range);
}
}
/* grab RTPInfo from the payloaders now */
rtpinfo = g_string_new ("");

169
gst/rtsp-server/rtsp-media.c
View file

@ -157,6 +157,50 @@ do_loop (GstRTSPMediaClass *klass)
return NULL;
}
static void
collect_media_stats (GstRTSPMedia *media)
{
GstFormat format;
gint64 position, duration;
media->range.unit = GST_RTSP_RANGE_NPT;
if (media->is_live) {
media->range.min.type = GST_RTSP_TIME_NOW;
media->range.min.seconds = -1;
media->range.max.type = GST_RTSP_TIME_END;
media->range.max.seconds = -1;
}
else {
/* get the position */
format = GST_FORMAT_TIME;
if (!gst_element_query_position (media->pipeline, &format, &position))
position = 0;
/* get the duration */
format = GST_FORMAT_TIME;
if (!gst_element_query_duration (media->pipeline, &format, &duration))
duration = -1;
if (position == -1) {
media->range.min.type = GST_RTSP_TIME_NOW;
media->range.min.seconds = -1;
}
else {
media->range.min.type = GST_RTSP_TIME_SECONDS;
media->range.min.seconds = ((gdouble)position) / GST_SECOND;
}
if (duration == -1) {
media->range.max.type = GST_RTSP_TIME_END;
media->range.max.seconds = -1;
}
else {
media->range.max.type = GST_RTSP_TIME_SECONDS;
media->range.max.seconds = ((gdouble)duration) / GST_SECOND;
}
}
}
/**
* gst_rtsp_media_new:
*
@ -250,6 +294,97 @@ gst_rtsp_media_get_stream (GstRTSPMedia *media, guint idx)
return res;
}
/**
* gst_rtsp_media_seek:
* @stream: a #GstRTSPMediaStream
* @range: a #GstRTSPTimeRange
*
* Seek the pipeline to @range.
*
* Returns: %TRUE on success.
*/
gboolean
gst_rtsp_media_seek (GstRTSPMedia *media, GstRTSPTimeRange *range)
{
GstSeekFlags flags;
gboolean res;
gint64 start, stop;
GstSeekType start_type, stop_type;
g_return_val_if_fail (GST_IS_RTSP_MEDIA (media), FALSE);
g_return_val_if_fail (range != NULL, FALSE);
if (range->unit != GST_RTSP_RANGE_NPT)
goto not_supported;
/* depends on the current playing state of the pipeline. We might need to
* queue this until we get EOS. */
flags = GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE;
start_type = stop_type = GST_SEEK_TYPE_NONE;
switch (range->min.type) {
case GST_RTSP_TIME_NOW:
start = -1;
break;
case GST_RTSP_TIME_SECONDS:
start = range->min.seconds * GST_SECOND;
start_type = GST_SEEK_TYPE_SET;
break;
case GST_RTSP_TIME_END:
default:
goto weird_type;
}
switch (range->max.type) {
case GST_RTSP_TIME_SECONDS:
stop = range->max.seconds * GST_SECOND;
stop_type = GST_SEEK_TYPE_SET;
break;
case GST_RTSP_TIME_END:
stop = -1;
stop_type = GST_SEEK_TYPE_SET;
break;
case GST_RTSP_TIME_NOW:
default:
goto weird_type;
}
if (start != -1 || stop != -1) {
g_message ("seeking to %"GST_TIME_FORMAT" - %"GST_TIME_FORMAT,
GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
#if 0
res = gst_element_seek (media->pipeline, 1.0, GST_FORMAT_TIME,
flags, start_type, start, stop_type, stop);
#endif
res = TRUE;
/* and block for the seek to complete */
gst_element_get_state (media->pipeline, NULL, NULL, -1);
g_message ("done seeking %d", res);
collect_media_stats (media);
}
else {
g_message ("no seek needed");
res = TRUE;
}
return res;
/* ERRORS */
not_supported:
{
g_warning ("seek unit %d not supported", range->unit);
return FALSE;
}
weird_type:
{
g_warning ("weird range type %d not supported", range->min.type);
return FALSE;
}
}
/**
* gst_rtsp_media_stream_rtp:
* @stream: a #GstRTSPMediaStream
@ -699,40 +834,6 @@ unlock_streams (GstRTSPMedia *media)
}
}
static void
collect_media_stats (GstRTSPMedia *media)
{
GstFormat format;
gint64 duration;
media->range.unit = GST_RTSP_RANGE_NPT;
if (media->is_live) {
media->range.min.type = GST_RTSP_TIME_NOW;
media->range.min.seconds = -1;
media->range.max.type = GST_RTSP_TIME_END;
media->range.max.seconds = -1;
}
else {
media->range.min.type = GST_RTSP_TIME_SECONDS;
media->range.min.seconds = 0.0;
/* get the duration */
format = GST_FORMAT_TIME;
if (!gst_element_query_duration (media->pipeline, &format, &duration))
duration = -1;
if (duration == -1) {
media->range.max.type = GST_RTSP_TIME_END;
media->range.max.seconds = -1;
}
else {
media->range.max.type = GST_RTSP_TIME_SECONDS;
media->range.max.seconds = ((gdouble)duration) / GST_SECOND;
}
}
}
static gboolean
default_handle_message (GstRTSPMedia *media, GstMessage *message)
{

2
gst/rtsp-server/rtsp-media.h
View file

@ -200,6 +200,8 @@ gboolean gst_rtsp_media_prepare (GstRTSPMedia *media);
guint gst_rtsp_media_n_streams (GstRTSPMedia *media);
GstRTSPMediaStream * gst_rtsp_media_get_stream (GstRTSPMedia *media, guint idx);
gboolean gst_rtsp_media_seek (GstRTSPMedia *media, GstRTSPTimeRange *range);
GstFlowReturn gst_rtsp_media_stream_rtp (GstRTSPMediaStream *stream, GstBuffer *buffer);
GstFlowReturn gst_rtsp_media_stream_rtcp (GstRTSPMediaStream *stream, GstBuffer *buffer);