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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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rtsp: add support for dynamic elements
Add support for dynamic elements. Don't set live pipelines back to paused.
This commit is contained in:
Wim Taymans
Wim Taymans
parent
415e5e674b
commit
fab65082da
3 changed files with 117 additions and 40 deletions
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@ -402,39 +402,52 @@ static void
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collect_streams (GstRTSPMediaFactory *factory, const GstRTSPUrl *url,
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GstRTSPMedia *media)
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{
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GstElement *element, *pay;
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GstElement *element, *elem;
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GstPad * pad;
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gint i;
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GstRTSPMediaStream *stream;
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gboolean have_elem;
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element = media->element;
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for (i = 0; ; i++) {
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have_elem = TRUE;
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for (i = 0; have_elem ; i++) {
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gchar *name;
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have_elem = FALSE;
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name = g_strdup_printf ("pay%d", i);
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if (!(pay = gst_bin_get_by_name (GST_BIN (element), name))) {
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/* no more payloaders found, we have found all the streams and we can
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* end the loop */
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g_free (name);
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break;
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if ((elem = gst_bin_get_by_name (GST_BIN (element), name))) {
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/* create the stream */
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stream = g_new0 (GstRTSPMediaStream, 1);
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stream->payloader = elem;
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g_message ("found stream %d with payloader %p", i, elem);
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pad = gst_element_get_static_pad (elem, "src");
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/* ghost the pad of the payloader to the element */
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stream->srcpad = gst_ghost_pad_new (name, pad);
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gst_element_add_pad (media->element, stream->srcpad);
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gst_object_unref (elem);
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/* add stream now */
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g_array_append_val (media->streams, stream);
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have_elem = TRUE;
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}
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/* create the stream */
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stream = g_new0 (GstRTSPMediaStream, 1);
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stream->payloader = pay;
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g_message ("found stream %d with payloader %p", i, pay);
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pad = gst_element_get_static_pad (pay, "src");
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/* ghost the pad of the payloader to the element */
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stream->srcpad = gst_ghost_pad_new (name, pad);
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gst_element_add_pad (media->element, stream->srcpad);
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gst_object_unref (pay);
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g_free (name);
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/* add stream now */
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g_array_append_val (media->streams, stream);
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name = g_strdup_printf ("dynpay%d", i);
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if ((elem = gst_bin_get_by_name (GST_BIN (element), name))) {
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/* a stream that will dynamically create pads to provide RTP packets */
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g_message ("found dynamic element %d, %p", i, elem);
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media->dynamic = g_list_prepend (media->dynamic, elem);
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have_elem = TRUE;
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}
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g_free (name);
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}
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}
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@ -134,6 +134,9 @@ gst_rtsp_media_finalize (GObject * obj)
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}
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g_array_free (media->streams, TRUE);
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g_list_foreach (media->dynamic, (GFunc) gst_object_unref, NULL);
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g_list_free (media->dynamic);
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if (media->source) {
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g_source_destroy (media->source);
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g_source_unref (media->source);
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@ -761,7 +764,6 @@ setup_stream (GstRTSPMediaStream *stream, guint idx, GstRTSPMedia *media)
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GstPad *pad, *teepad, *selpad;
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GstPadLinkReturn ret;
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gint i;
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GstElement *tee;
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/* allocate udp ports, we will have 4 of them, 2 for receiving RTP/RTCP and 2
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* for sending RTP/RTCP. The sender and receiver ports are shared between the
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@ -826,42 +828,42 @@ setup_stream (GstRTSPMediaStream *stream, guint idx, GstRTSPMedia *media)
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goto link_failed;
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/* make tee for RTP and link to stream */
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tee = gst_element_factory_make ("tee", NULL);
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gst_bin_add (GST_BIN_CAST (media->pipeline), tee);
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stream->tee[0] = gst_element_factory_make ("tee", NULL);
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gst_bin_add (GST_BIN_CAST (media->pipeline), stream->tee[0]);
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pad = gst_element_get_static_pad (tee, "sink");
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pad = gst_element_get_static_pad (stream->tee[0], "sink");
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gst_pad_link (stream->send_rtp_src, pad);
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gst_object_unref (pad);
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/* link RTP sink, we're pretty sure this will work. */
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teepad = gst_element_get_request_pad (tee, "src%d");
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teepad = gst_element_get_request_pad (stream->tee[0], "src%d");
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pad = gst_element_get_static_pad (stream->udpsink[0], "sink");
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gst_pad_link (teepad, pad);
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gst_object_unref (pad);
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gst_object_unref (teepad);
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teepad = gst_element_get_request_pad (tee, "src%d");
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teepad = gst_element_get_request_pad (stream->tee[0], "src%d");
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pad = gst_element_get_static_pad (stream->appsink[0], "sink");
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gst_pad_link (teepad, pad);
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gst_object_unref (pad);
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gst_object_unref (teepad);
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/* make tee for RTCP */
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tee = gst_element_factory_make ("tee", NULL);
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gst_bin_add (GST_BIN_CAST (media->pipeline), tee);
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stream->tee[1] = gst_element_factory_make ("tee", NULL);
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gst_bin_add (GST_BIN_CAST (media->pipeline), stream->tee[1]);
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pad = gst_element_get_static_pad (tee, "sink");
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pad = gst_element_get_static_pad (stream->tee[1], "sink");
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gst_pad_link (stream->send_rtcp_src, pad);
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gst_object_unref (pad);
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/* link RTCP elements */
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teepad = gst_element_get_request_pad (tee, "src%d");
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teepad = gst_element_get_request_pad (stream->tee[1], "src%d");
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pad = gst_element_get_static_pad (stream->udpsink[1], "sink");
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gst_pad_link (teepad, pad);
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gst_object_unref (pad);
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gst_object_unref (teepad);
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teepad = gst_element_get_request_pad (tee, "src%d");
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teepad = gst_element_get_request_pad (stream->tee[1], "src%d");
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pad = gst_element_get_static_pad (stream->appsink[1], "sink");
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gst_pad_link (teepad, pad);
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gst_object_unref (pad);
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@ -1046,6 +1048,56 @@ bus_message (GstBus *bus, GstMessage *message, GstRTSPMedia *media)
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return ret;
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}
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static void
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pad_added_cb (GstElement *element, GstPad *pad, GstRTSPMedia *media)
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{
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GstRTSPMediaStream *stream;
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gchar *name;
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gint i;
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i = media->streams->len + 1;
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g_message ("pad added %s:%s, stream %d", GST_DEBUG_PAD_NAME (pad), i);
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stream = g_new0 (GstRTSPMediaStream, 1);
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stream->payloader = element;
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name = g_strdup_printf ("dynpay%d", i);
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/* ghost the pad of the payloader to the element */
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stream->srcpad = gst_ghost_pad_new (name, pad);
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gst_pad_set_active (stream->srcpad, TRUE);
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gst_element_add_pad (media->element, stream->srcpad);
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g_free (name);
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/* add stream now */
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g_array_append_val (media->streams, stream);
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setup_stream (stream, i, media);
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for (i = 0; i < 2; i++) {
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gst_element_set_state (stream->udpsink[i], GST_STATE_PAUSED);
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gst_element_set_state (stream->appsink[i], GST_STATE_PAUSED);
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gst_element_set_state (stream->tee[i], GST_STATE_PAUSED);
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gst_element_set_state (stream->selector[i], GST_STATE_PAUSED);
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gst_element_set_state (stream->appsrc[i], GST_STATE_PAUSED);
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}
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}
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static void
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no_more_pads_cb (GstElement *element, GstRTSPMedia *media)
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{
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g_message ("no more pads");
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if (media->fakesink) {
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gst_object_ref (media->fakesink);
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gst_bin_remove (GST_BIN (media->pipeline), media->fakesink);
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gst_element_set_state (media->fakesink, GST_STATE_NULL);
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gst_object_unref (media->fakesink);
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media->fakesink = NULL;
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g_message ("removed fakesink");
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}
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}
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/**
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* gst_rtsp_media_prepare:
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* @obj: a #GstRTSPMedia
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@ -1065,6 +1117,7 @@ gst_rtsp_media_prepare (GstRTSPMedia *media)
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guint i, n_streams;
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GstRTSPMediaClass *klass;
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GstBus *bus;
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GList *walk;
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if (media->prepared)
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goto was_prepared;
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@ -1090,10 +1143,11 @@ gst_rtsp_media_prepare (GstRTSPMedia *media)
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media->rtpbin = gst_element_factory_make ("gstrtpbin", "rtpbin");
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/* add stuf to the bin */
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/* add stuff to the bin */
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gst_bin_add (GST_BIN (media->pipeline), media->rtpbin);
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/* link streams we already have */
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/* link streams we already have, other streams might appear when we have
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* dynamic elements */
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n_streams = gst_rtsp_media_n_streams (media);
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for (i = 0; i < n_streams; i++) {
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GstRTSPMediaStream *stream;
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@ -1103,6 +1157,16 @@ gst_rtsp_media_prepare (GstRTSPMedia *media)
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setup_stream (stream, i, media);
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}
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for (walk = media->dynamic; walk; walk = g_list_next (walk)) {
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GstElement *elem = walk->data;
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g_signal_connect (elem, "pad-added", (GCallback) pad_added_cb, media);
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g_signal_connect (elem, "no-more-pads", (GCallback) no_more_pads_cb, media);
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media->fakesink = gst_element_factory_make ("fakesink", "fakesink");
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gst_bin_add (GST_BIN (media->pipeline), media->fakesink);
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}
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/* first go to PAUSED */
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ret = gst_element_set_state (media->pipeline, GST_STATE_PAUSED);
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media->target_state = GST_STATE_PAUSED;
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@ -1129,11 +1193,6 @@ gst_rtsp_media_prepare (GstRTSPMedia *media)
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if (ret == GST_STATE_CHANGE_FAILURE)
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goto state_failed;
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/* and back to PAUSED for live pipelines */
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ret = gst_element_set_state (media->pipeline, GST_STATE_PAUSED);
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if (ret == GST_STATE_CHANGE_FAILURE)
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goto state_failed;
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/* collect stats about the media */
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collect_media_stats (media);
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@ -1158,7 +1217,7 @@ state_failed:
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}
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is_reused:
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{
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g_warning ("can not reused media %p", media);
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g_warning ("can not reuse media %p", media);
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return FALSE;
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}
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}
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@ -1281,8 +1340,10 @@ gst_rtsp_media_set_state (GstRTSPMedia *media, GstState state, GArray *transport
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}
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case GST_RTSP_LOWER_TRANS_TCP:
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if (add) {
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g_message ("adding TCP %s", trans->destination);
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stream->transports = g_list_prepend (stream->transports, tr);
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} else if (remove) {
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g_message ("removing TCP %s", trans->destination);
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stream->transports = g_list_remove (stream->transports, tr);
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}
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break;
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@ -110,6 +110,7 @@ struct _GstRTSPMediaStream {
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GstElement *appsrc[2];
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GstElement *appsink[2];
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GstElement *tee[2];
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GstElement *selector[2];
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/* server ports for sending/receiving */
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@ -153,11 +154,13 @@ struct _GstRTSPMedia {
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GstElement *element;
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GArray *streams;
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GList *dynamic;
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gboolean prepared;
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gint active;
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/* the pipeline for the media */
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GstElement *pipeline;
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GstElement *fakesink;
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GSource *source;
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guint id;
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