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media: refactor starting and waiting for preroll

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Based on patches from Ognyan Tonchev <ognyan@axis.com>

See https://bugzilla.gnome.org/show_bug.cgi?id=711257
This commit is contained in:
Wim Taymans 2013-11-28 13:58:05 +01:00
parent bdef631218
commit 6ce48c51a2
1 changed files with 85 additions and 38 deletions
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123
gst/rtsp-server/rtsp-media.c
View file

@ -173,6 +173,8 @@ static gboolean default_query_position (GstRTSPMedia * media,
gint64 * position);
static gboolean default_query_stop (GstRTSPMedia * media, gint64 * stop);
static gboolean wait_preroll (GstRTSPMedia * media);
static guint gst_rtsp_media_signals[SIGNAL_LAST] = { 0 };
G_DEFINE_TYPE (GstRTSPMedia, gst_rtsp_media, G_TYPE_OBJECT);
@ -1345,10 +1347,14 @@ gst_rtsp_media_seek (GstRTSPMedia * media, GstRTSPTimeRange * range)
/* and block for the seek to complete */
GST_INFO ("done seeking %d", res);
gst_element_get_state (priv->pipeline, NULL, NULL, -1);
GST_INFO ("prerolled again");
g_rec_mutex_unlock (&priv->state_lock);
collect_media_stats (media);
/* wait until pipeline is prerolled again, this will also collect stats */
if (!wait_preroll (media))
goto preroll_failed;
g_rec_mutex_lock (&priv->state_lock);
GST_INFO ("prerolled again");
} else {
GST_INFO ("no seek needed");
res = TRUE;
@ -1376,6 +1382,11 @@ not_supported:
GST_WARNING ("conversion to npt not supported");
return FALSE;
}
preroll_failed:
{
GST_WARNING ("failed to preroll after seek");
return FALSE;
}
}
static void
@ -1684,10 +1695,74 @@ struct _DynPaySignalHandlers
};
static gboolean
start_prepare (GstRTSPMedia * media)
start_preroll (GstRTSPMedia * media)
{
GstRTSPMediaPrivate *priv = media->priv;
GstStateChangeReturn ret;
GST_INFO ("setting pipeline to PAUSED for media %p", media);
/* first go to PAUSED */
ret = gst_element_set_state (priv->pipeline, GST_STATE_PAUSED);
priv->target_state = GST_STATE_PAUSED;
switch (ret) {
case GST_STATE_CHANGE_SUCCESS:
GST_INFO ("SUCCESS state change for media %p", media);
priv->seekable = TRUE;
break;
case GST_STATE_CHANGE_ASYNC:
GST_INFO ("ASYNC state change for media %p", media);
priv->seekable = TRUE;
break;
case GST_STATE_CHANGE_NO_PREROLL:
/* we need to go to PLAYING */
GST_INFO ("NO_PREROLL state change: live media %p", media);
/* FIXME we disable seeking for live streams for now. We should perform a
* seeking query in preroll instead */
priv->seekable = FALSE;
priv->is_live = TRUE;
ret = gst_element_set_state (priv->pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE)
goto state_failed;
break;
case GST_STATE_CHANGE_FAILURE:
goto state_failed;
}
return TRUE;
state_failed:
{
GST_WARNING ("failed to preroll pipeline");
return FALSE;
}
}
static gboolean
wait_preroll (GstRTSPMedia * media)
{
GstRTSPMediaStatus status;
GST_DEBUG ("wait to preroll pipeline");
/* wait until pipeline is prerolled */
status = gst_rtsp_media_get_status (media);
if (status == GST_RTSP_MEDIA_STATUS_ERROR)
goto preroll_failed;
return TRUE;
preroll_failed:
{
GST_WARNING ("failed to preroll pipeline");
return FALSE;
}
}
static gboolean
start_prepare (GstRTSPMedia * media)
{
GstRTSPMediaPrivate *priv = media->priv;
guint i;
GList *walk;
@ -1723,38 +1798,12 @@ start_prepare (GstRTSPMedia * media)
gst_bin_add (GST_BIN (priv->pipeline), priv->fakesink);
}
GST_INFO ("setting pipeline to PAUSED for media %p", media);
/* first go to PAUSED */
ret = gst_element_set_state (priv->pipeline, GST_STATE_PAUSED);
priv->target_state = GST_STATE_PAUSED;
switch (ret) {
case GST_STATE_CHANGE_SUCCESS:
GST_INFO ("SUCCESS state change for media %p", media);
priv->seekable = TRUE;
break;
case GST_STATE_CHANGE_ASYNC:
GST_INFO ("ASYNC state change for media %p", media);
priv->seekable = TRUE;
break;
case GST_STATE_CHANGE_NO_PREROLL:
/* we need to go to PLAYING */
GST_INFO ("NO_PREROLL state change: live media %p", media);
/* FIXME we disable seeking for live streams for now. We should perform a
* seeking query in preroll instead */
priv->seekable = FALSE;
priv->is_live = TRUE;
ret = gst_element_set_state (priv->pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE)
goto state_failed;
break;
case GST_STATE_CHANGE_FAILURE:
goto state_failed;
}
if (!start_preroll (media))
goto preroll_failed;
return FALSE;
state_failed:
preroll_failed:
{
GST_WARNING ("failed to preroll pipeline");
gst_rtsp_media_set_status (media, GST_RTSP_MEDIA_STATUS_ERROR);
@ -1780,7 +1829,6 @@ gboolean
gst_rtsp_media_prepare (GstRTSPMedia * media, GstRTSPThread * thread)
{
GstRTSPMediaPrivate *priv;
GstRTSPMediaStatus status;
GstBus *bus;
GSource *source;
@ -1856,9 +1904,8 @@ wait_status:
/* now wait for all pads to be prerolled, FIXME, we should somehow be
* able to do this async so that we don't block the server thread. */
status = gst_rtsp_media_get_status (media);
if (status == GST_RTSP_MEDIA_STATUS_ERROR)
goto state_failed;
if (!wait_preroll (media))
goto preroll_failed;
g_signal_emit (media, gst_rtsp_media_signals[SIGNAL_PREPARED], 0, NULL);
@ -1896,7 +1943,7 @@ no_rtpbin:
g_warning ("failed to create element 'rtpbin', check your installation");
return FALSE;
}
state_failed:
preroll_failed:
{
GST_WARNING ("failed to preroll pipeline");
gst_rtsp_media_unprepare (media);