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rtsp-stream: preroll on gap events

Browse source 
This allows negotiating a SDP with all streams present, but only
start sending packets at some later point in time

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-rtsp-server/-/merge_requests/146>
This commit is contained in:
Mathieu Duponchelle 2020-08-21 03:02:40 +02:00 committed by GStreamer Merge Bot
parent 883ddc72bb
commit 5699ada939
1 changed files with 22 additions and 9 deletions
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31
gst/rtsp-server/rtsp-stream.c
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@ -5179,35 +5179,47 @@ pad_blocking (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
GstRTSPStreamPrivate *priv;
GstRTSPStream *stream;
GstBuffer *buffer = NULL;
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
stream = user_data;
priv = stream->priv;
GST_DEBUG_OBJECT (pad, "now blocking");
g_mutex_lock (&priv->lock);
priv->blocking = TRUE;
if ((info->type & GST_PAD_PROBE_TYPE_BUFFER)) {
buffer = gst_pad_probe_info_get_buffer (info);
priv->position = GST_BUFFER_TIMESTAMP (buffer);
} else if ((info->type & GST_PAD_PROBE_TYPE_BUFFER_LIST)) {
GstBufferList *list = gst_pad_probe_info_get_buffer_list (info);
buffer = gst_buffer_list_get (list, 0);
priv->position = GST_BUFFER_TIMESTAMP (buffer);
} else if ((info->type & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM)) {
if (GST_EVENT_TYPE (info->data) == GST_EVENT_GAP) {
gst_event_parse_gap (info->data, &priv->position, NULL);
} else {
ret = GST_PAD_PROBE_PASS;
g_mutex_unlock (&priv->lock);
goto done;
}
} else {
g_assert_not_reached ();
}
g_assert (buffer);
priv->position = GST_BUFFER_TIMESTAMP (buffer);
GST_DEBUG_OBJECT (stream, "buffer position: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
priv->blocking = TRUE;
GST_DEBUG_OBJECT (pad, "Now blocking");
GST_DEBUG_OBJECT (stream, "position: %" GST_TIME_FORMAT,
GST_TIME_ARGS (priv->position));
g_mutex_unlock (&priv->lock);
gst_element_post_message (priv->payloader,
gst_message_new_element (GST_OBJECT_CAST (priv->payloader),
gst_structure_new_empty ("GstRTSPStreamBlocking")));
return GST_PAD_PROBE_OK;
done:
return ret;
}
static void
@ -5233,7 +5245,8 @@ set_blocked (GstRTSPStream * stream, gboolean blocked)
priv->blocking = FALSE;
priv->blocked_id[i] = gst_pad_add_probe (priv->send_src[i],
GST_PAD_PROBE_TYPE_BLOCK | GST_PAD_PROBE_TYPE_BUFFER |
GST_PAD_PROBE_TYPE_BUFFER_LIST, pad_blocking,
GST_PAD_PROBE_TYPE_BUFFER_LIST |
GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, pad_blocking,
g_object_ref (stream), g_object_unref);
}
}