/**
* SECTION:element-rtpmux
+ * @title: rtpmux
* @see_also: rtpdtmfmux
*
* The rtp muxer takes multiple RTP streams having the same clock-rate and
* muxes into a single stream with a single SSRC.
*
- * <refsect2>
- * <title>Example pipelines</title>
+ * ## Example pipelines
* |[
* gst-launch-1.0 rtpmux name=mux ! udpsink host=127.0.0.1 port=8888 \
* alsasrc ! alawenc ! rtppcmapay ! \
* In this example, an audio stream is captured from ALSA and another is
* generated, both are encoded into different payload types and muxed together
* so they can be sent on the same port.
- * </refsect2>
+ *
*/
#ifdef HAVE_CONFIG_H
gstelement_class = (GstElementClass *) klass;
- gst_element_class_add_pad_template (gstelement_class,
- gst_static_pad_template_get (&src_factory));
- gst_element_class_add_pad_template (gstelement_class,
- gst_static_pad_template_get (&sink_factory));
+ gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
+ gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
gst_element_class_set_static_metadata (gstelement_class, "RTP muxer",
"Codec/Muxer",
0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
g_param_spec_uint ("ssrc", "SSRC",
- "The SSRC of the packets (-1 == random)",
+ "The SSRC of the packets (default == random)",
0, G_MAXUINT, DEFAULT_SSRC,
- G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE |
+ G_PARAM_STATIC_STRINGS));
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_rtp_mux_request_new_pad);
static gboolean
gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux, GstEvent * event)
{
- GstIterator *iter;
- gboolean result = FALSE;
- gboolean done = FALSE;
-
- iter = gst_element_iterate_sink_pads (GST_ELEMENT (rtp_mux));
-
- while (!done) {
- GValue item = { 0, };
-
- switch (gst_iterator_next (iter, &item)) {
- case GST_ITERATOR_OK:
- gst_event_ref (event);
- result |= gst_pad_push_event (g_value_get_object (&item), event);
- g_value_reset (&item);
- break;
- case GST_ITERATOR_RESYNC:
- gst_iterator_resync (iter);
- result = FALSE;
- break;
- case GST_ITERATOR_ERROR:
- GST_WARNING_OBJECT (rtp_mux, "Error iterating sinkpads");
- case GST_ITERATOR_DONE:
- done = TRUE;
- break;
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_CUSTOM_UPSTREAM:
+ {
+ const GstStructure *s = gst_event_get_structure (event);
+
+ if (gst_structure_has_name (s, "GstRTPCollision")) {
+ guint ssrc = 0;
+
+ if (!gst_structure_get_uint (s, "ssrc", &ssrc))
+ ssrc = -1;
+
+ GST_DEBUG_OBJECT (rtp_mux, "collided ssrc: %x", ssrc);
+
+ /* choose another ssrc for our stream */
+ GST_OBJECT_LOCK (rtp_mux);
+ if (ssrc == rtp_mux->current_ssrc) {
+ GstCaps *caps;
+ guint suggested_ssrc = 0;
+ guint32 new_ssrc;
+
+ if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
+ rtp_mux->current_ssrc = suggested_ssrc;
+
+ while (ssrc == rtp_mux->current_ssrc)
+ rtp_mux->current_ssrc = g_random_int ();
+
+ new_ssrc = rtp_mux->current_ssrc;
+ GST_INFO_OBJECT (rtp_mux, "New ssrc after collision %x (was: %x)",
+ new_ssrc, ssrc);
+ GST_OBJECT_UNLOCK (rtp_mux);
+
+ caps = gst_pad_get_current_caps (rtp_mux->srcpad);
+ caps = gst_caps_make_writable (caps);
+ gst_caps_set_simple (caps, "ssrc", G_TYPE_UINT, new_ssrc, NULL);
+ gst_pad_set_caps (rtp_mux->srcpad, caps);
+ gst_caps_unref (caps);
+ } else {
+ GST_OBJECT_UNLOCK (rtp_mux);
+ }
+ }
+ break;
}
+ default:
+ break;
}
- gst_iterator_free (iter);
- gst_event_unref (event);
- return result;
+
+ return gst_pad_event_default (rtp_mux->srcpad, GST_OBJECT (rtp_mux), event);
}
static void
gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
rtp_mux->ssrc = DEFAULT_SSRC;
+ rtp_mux->current_ssrc = DEFAULT_SSRC;
rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
GST_LOG_OBJECT (rtp_mux,
- "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u",
+ "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u, ssrc=%x",
rtpbuffer->map[0].size, rtp_mux->seqnum,
- gst_rtp_buffer_get_timestamp (rtpbuffer));
+ gst_rtp_buffer_get_timestamp (rtpbuffer), rtp_mux->current_ssrc);
if (padpriv) {
- if (padpriv->segment.format == GST_FORMAT_TIME)
+ if (padpriv->segment.format == GST_FORMAT_TIME) {
GST_BUFFER_PTS (rtpbuffer->buffer) =
gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
GST_BUFFER_PTS (rtpbuffer->buffer));
+ GST_BUFFER_DTS (rtpbuffer->buffer) =
+ gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
+ GST_BUFFER_DTS (rtpbuffer->buffer));
+ }
}
return TRUE;
return FALSE;
if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
- GST_BUFFER_TIMESTAMP_IS_VALID (*buffer))
- bd->rtp_mux->last_stop = GST_BUFFER_TIMESTAMP (*buffer) +
+ GST_BUFFER_PTS_IS_VALID (*buffer))
+ bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
GST_BUFFER_DURATION (*buffer);
else
bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
return TRUE;
}
+static gboolean resend_events (GstPad * pad, GstEvent ** event,
+ gpointer user_data);
+
static GstFlowReturn
gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
GstBufferList * bufferlist)
GstRTPMux *rtp_mux;
GstFlowReturn ret;
GstRTPMuxPadPrivate *padpriv;
+ gboolean changed = FALSE;
struct BufferListData bd;
rtp_mux = GST_RTP_MUX (parent);
+ if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
+ GstCaps *current_caps = gst_pad_get_current_caps (pad);
+
+ if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
+ gst_pad_mark_reconfigure (rtp_mux->srcpad);
+ if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
+ ret = GST_FLOW_FLUSHING;
+ else
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ gst_buffer_list_unref (bufferlist);
+ goto out;
+ }
+ gst_caps_unref (current_caps);
+ }
+
GST_OBJECT_LOCK (rtp_mux);
padpriv = gst_pad_get_element_private (pad);
bufferlist = gst_buffer_list_make_writable (bufferlist);
gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
+ if (!bd.drop && pad != rtp_mux->last_pad) {
+ changed = TRUE;
+ g_clear_object (&rtp_mux->last_pad);
+ rtp_mux->last_pad = g_object_ref (pad);
+ }
+
GST_OBJECT_UNLOCK (rtp_mux);
+ if (changed)
+ gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
+
if (bd.drop) {
gst_buffer_list_unref (bufferlist);
ret = GST_FLOW_OK;
gst_event_parse_caps (*event, &caps);
gst_rtp_mux_setcaps (pad, rtp_mux, caps);
+ } else if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
+ GstSegment new_segment;
+ gst_segment_init (&new_segment, GST_FORMAT_TIME);
+ gst_pad_push_event (rtp_mux->srcpad, gst_event_new_segment (&new_segment));
} else {
gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
}
gboolean changed = FALSE;
GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
- rtp_mux = GST_RTP_MUX (GST_OBJECT_PARENT (pad));
+ rtp_mux = GST_RTP_MUX (parent);
+
+ if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
+ GstCaps *current_caps = gst_pad_get_current_caps (pad);
+
+ if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
+ gst_pad_mark_reconfigure (rtp_mux->srcpad);
+ if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
+ ret = GST_FLOW_FLUSHING;
+ else
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ gst_buffer_unref (buffer);
+ goto out;
+ }
+ gst_caps_unref (current_caps);
+ }
GST_OBJECT_LOCK (rtp_mux);
padpriv = gst_pad_get_element_private (pad);
}
if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
- GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
- rtp_mux->last_stop = GST_BUFFER_TIMESTAMP (buffer) +
+ GST_BUFFER_PTS_IS_VALID (buffer))
+ rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
GST_BUFFER_DURATION (buffer);
else
rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
ret = gst_pad_push (rtp_mux->srcpad, buffer);
}
+out:
return ret;
}
GstStructure *structure;
gboolean ret = FALSE;
GstRTPMuxPadPrivate *padpriv;
+ GstCaps *peercaps;
+
+ if (caps == NULL)
+ return FALSE;
+
+ if (!gst_caps_is_fixed (caps))
+ return FALSE;
+
+ peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
+ if (peercaps) {
+ GstCaps *tcaps, *othercaps;;
+ tcaps = gst_pad_get_pad_template_caps (pad);
+ othercaps = gst_caps_intersect_full (peercaps, tcaps,
+ GST_CAPS_INTERSECT_FIRST);
+
+ if (gst_caps_get_size (othercaps) > 0) {
+ structure = gst_caps_get_structure (othercaps, 0);
+ GST_OBJECT_LOCK (rtp_mux);
+ if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
+ GST_INFO_OBJECT (pad, "Use downstream ssrc: %x", rtp_mux->current_ssrc);
+ rtp_mux->have_ssrc = TRUE;
+ }
+ if (gst_structure_get_uint (structure,
+ "timestamp-offset", &rtp_mux->ts_base)) {
+ GST_INFO_OBJECT (pad, "Use downstream timestamp-offset: %u",
+ rtp_mux->ts_base);
+ }
+ GST_OBJECT_UNLOCK (rtp_mux);
+ }
+
+ gst_caps_unref (othercaps);
+
+ gst_caps_unref (peercaps);
+ gst_caps_unref (tcaps);
+ }
structure = gst_caps_get_structure (caps, 0);
&padpriv->timestamp_offset)) {
padpriv->have_timestamp_offset = TRUE;
}
- GST_OBJECT_UNLOCK (rtp_mux);
caps = gst_caps_copy (caps);
+ /* if we don't have a specified ssrc, first try to take one from the caps,
+ and if that fails, generate one */
+ if (rtp_mux->ssrc == DEFAULT_SSRC) {
+ if (rtp_mux->current_ssrc == DEFAULT_SSRC) {
+ if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
+ rtp_mux->current_ssrc = g_random_int ();
+ GST_INFO_OBJECT (rtp_mux, "Set random ssrc %x", rtp_mux->current_ssrc);
+ }
+ }
+ } else {
+ rtp_mux->current_ssrc = rtp_mux->ssrc;
+ GST_INFO_OBJECT (rtp_mux, "Set ssrc %x", rtp_mux->current_ssrc);
+ }
+
gst_caps_set_simple (caps,
"timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
- "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base, NULL);
+ "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
+ "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
+
+ GST_OBJECT_UNLOCK (rtp_mux);
if (rtp_mux->send_stream_start) {
gchar s_id[32];
"setting caps %" GST_PTR_FORMAT " on src pad..", caps);
ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
- gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc);
gst_caps_unref (caps);
GstPad *pad = g_value_get_object (item);
GstCaps *peercaps;
GstCaps *accumcaps;
- GstCaps *intersect;
if (pad == mypad)
return TRUE;
peercaps = gst_caps_make_writable (peercaps);
clear_caps (peercaps, TRUE);
- intersect = gst_caps_intersect (accumcaps, peercaps);
-
- g_value_take_boxed (ret, intersect);
- gst_caps_unref (peercaps);
+ g_value_take_boxed (ret, peercaps);
- return !gst_caps_is_empty (intersect);
+ return !gst_caps_is_empty (peercaps);
}
static GstCaps *
GstCaps *peercaps;
GstCaps *othercaps;
GstCaps *tcaps;
+ const GstStructure *structure;
- peercaps = gst_pad_peer_query_caps (mux->srcpad, filter);
+ peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
if (peercaps) {
tcaps = gst_pad_get_pad_template_caps (pad);
}
gst_caps_unref (tcaps);
- clear_caps (othercaps, FALSE);
+ GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
+ GST_PTR_FORMAT, othercaps);
+
+ structure = gst_caps_get_structure (othercaps, 0);
+ if (mux->ssrc == DEFAULT_SSRC) {
+ if (gst_structure_get_uint (structure, "ssrc", &mux->current_ssrc))
+ GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x", mux->current_ssrc);
+ }
+
+ clear_caps (othercaps, TRUE);
g_value_init (&v, GST_TYPE_CAPS);
} while (res == GST_ITERATOR_RESYNC);
gst_iterator_free (iter);
- caps = (GstCaps *) gst_value_get_caps (&v);
+ caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
+
+ g_value_unset (&v);
+ gst_caps_unref (othercaps);
if (res == GST_ITERATOR_ERROR) {
gst_caps_unref (caps);
caps = gst_caps_new_empty ();
}
- gst_caps_unref (othercaps);
return caps;
}
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
+ GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
+ GST_PTR_FORMAT, filter);
caps = gst_rtp_mux_getcaps (pad, mux, filter);
gst_query_set_caps_result (query, caps);
+ GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
+ GST_PTR_FORMAT, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
return res;
-
-
}
-
static void
gst_rtp_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
rtp_mux = GST_RTP_MUX (object);
+ GST_OBJECT_LOCK (rtp_mux);
switch (prop_id) {
case PROP_TIMESTAMP_OFFSET:
g_value_set_int (value, rtp_mux->ts_offset);
g_value_set_int (value, rtp_mux->seqnum_offset);
break;
case PROP_SEQNUM:
- GST_OBJECT_LOCK (rtp_mux);
g_value_set_uint (value, rtp_mux->seqnum);
- GST_OBJECT_UNLOCK (rtp_mux);
break;
case PROP_SSRC:
g_value_set_uint (value, rtp_mux->ssrc);
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
+ GST_OBJECT_UNLOCK (rtp_mux);
}
static void
rtp_mux->seqnum_offset = g_value_get_int (value);
break;
case PROP_SSRC:
+ GST_OBJECT_LOCK (rtp_mux);
rtp_mux->ssrc = g_value_get_uint (value);
+ rtp_mux->current_ssrc = rtp_mux->ssrc;
+ rtp_mux->have_ssrc = TRUE;
+ GST_DEBUG_OBJECT (rtp_mux, "ssrc prop set to %x", rtp_mux->ssrc);
+ GST_OBJECT_UNLOCK (rtp_mux);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
gboolean is_pad;
gboolean ret;
+ GST_OBJECT_LOCK (mux);
+ is_pad = (pad == mux->last_pad);
+ GST_OBJECT_UNLOCK (mux);
+
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
+ GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
+ GST_PTR_FORMAT, caps);
ret = gst_rtp_mux_setcaps (pad, mux, caps);
gst_event_unref (event);
return ret;
gst_event_copy_segment (event, &padpriv->segment);
}
GST_OBJECT_UNLOCK (mux);
+
+ if (is_pad) {
+ GstSegment new_segment;
+ gst_segment_init (&new_segment, GST_FORMAT_TIME);
+ gst_event_unref (event);
+ event = gst_event_new_segment (&new_segment);
+ }
break;
}
default:
break;
}
- GST_OBJECT_LOCK (mux);
- is_pad = (pad == mux->last_pad);
- GST_OBJECT_UNLOCK (mux);
-
if (is_pad) {
return gst_pad_push_event (mux->srcpad, event);
} else {
g_clear_object (&rtp_mux->last_pad);
rtp_mux->send_stream_start = TRUE;
- if (rtp_mux->ssrc == -1)
- rtp_mux->current_ssrc = g_random_int ();
- else
- rtp_mux->current_ssrc = rtp_mux->ssrc;
-
if (rtp_mux->seqnum_offset == -1)
rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
else
rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
+ if (rtp_mux->have_ssrc)
+ rtp_mux->current_ssrc = rtp_mux->ssrc;
+
GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
GST_OBJECT_UNLOCK (rtp_mux);