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rtsp-media: Add support for sending+receiving medias

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We need to add an appsrc/appsink in that case because otherwise the
media bin will be a sink and a source for rtpbin, causing a pipeline
loop.

https://bugzilla.gnome.org/show_bug.cgi?id=788950
This commit is contained in:
Sebastian Dröge 2017-10-12 21:00:16 +03:00
parent 94e70b77aa
commit 231700b2bb
1 changed files with 162 additions and 6 deletions
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168
gst/rtsp-server/rtsp-media.c
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@ -119,6 +119,7 @@ struct _GstRTSPMediaPrivate
GSource *source;
guint id;
GstRTSPThread *thread;
GList *pending_pipeline_elements;
gboolean time_provider;
GstNetTimeProvider *nettime;
@ -462,6 +463,7 @@ gst_rtsp_media_finalize (GObject * obj)
g_ptr_array_unref (priv->streams);
g_list_free_full (priv->dynamic, gst_object_unref);
g_list_free_full (priv->pending_pipeline_elements, gst_object_unref);
if (priv->pipeline)
gst_object_unref (priv->pipeline);
@ -867,6 +869,7 @@ gst_rtsp_media_take_pipeline (GstRTSPMedia * media, GstPipeline * pipeline)
GstRTSPMediaPrivate *priv;
GstElement *old;
GstNetTimeProvider *nettime;
GList *l;
g_return_if_fail (GST_IS_RTSP_MEDIA (media));
g_return_if_fail (GST_IS_PIPELINE (pipeline));
@ -887,6 +890,12 @@ gst_rtsp_media_take_pipeline (GstRTSPMedia * media, GstPipeline * pipeline)
gst_object_unref (nettime);
gst_bin_add (GST_BIN_CAST (pipeline), priv->element);
for (l = priv->pending_pipeline_elements; l; l = l->next) {
gst_bin_add (GST_BIN_CAST (pipeline), l->data);
}
g_list_free (priv->pending_pipeline_elements);
priv->pending_pipeline_elements = NULL;
}
/**
@ -1852,6 +1861,78 @@ gst_rtsp_media_collect_streams (GstRTSPMedia * media)
}
}
typedef struct
{
GstElement *appsink, *appsrc;
GstRTSPStream *stream;
} AppSinkSrcData;
static GstFlowReturn
appsink_new_sample (GstAppSink * appsink, gpointer user_data)
{
AppSinkSrcData *data = user_data;
GstSample *sample;
GstFlowReturn ret;
sample = gst_app_sink_pull_sample (appsink);
if (!sample)
return GST_FLOW_FLUSHING;
ret = gst_app_src_push_sample (GST_APP_SRC (data->appsrc), sample);
gst_sample_unref (sample);
return ret;
}
static GstAppSinkCallbacks appsink_callbacks = {
NULL,
NULL,
appsink_new_sample,
};
static GstPadProbeReturn
appsink_pad_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
AppSinkSrcData *data = user_data;
if (GST_IS_EVENT (info->data)
&& GST_EVENT_TYPE (info->data) == GST_EVENT_LATENCY) {
GstClockTime min, max;
if (gst_base_sink_query_latency (GST_BASE_SINK (data->appsink), NULL, NULL,
&min, &max)) {
g_object_set (data->appsrc, "min-latency", min, "max-latency", max, NULL);
g_print ("setting latency to %lu %lu\n", min, max);
}
} else if (GST_IS_QUERY (info->data)) {
GstPad *srcpad = gst_element_get_static_pad (data->appsrc, "src");
if (gst_pad_peer_query (srcpad, GST_QUERY_CAST (info->data))) {
gst_object_unref (srcpad);
return GST_PAD_PROBE_HANDLED;
}
gst_object_unref (srcpad);
}
return GST_PAD_PROBE_OK;
}
static GstPadProbeReturn
appsrc_pad_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
AppSinkSrcData *data = user_data;
if (GST_IS_QUERY (info->data)) {
GstPad *sinkpad = gst_element_get_static_pad (data->appsink, "sink");
if (gst_pad_peer_query (sinkpad, GST_QUERY_CAST (info->data))) {
gst_object_unref (sinkpad);
return GST_PAD_PROBE_HANDLED;
}
gst_object_unref (sinkpad);
}
return GST_PAD_PROBE_OK;
}
/**
* gst_rtsp_media_create_stream:
* @media: a #GstRTSPMedia
@ -1870,9 +1951,10 @@ gst_rtsp_media_create_stream (GstRTSPMedia * media, GstElement * payloader,
{
GstRTSPMediaPrivate *priv;
GstRTSPStream *stream;
GstPad *ghostpad;
GstPad *streampad;
gchar *name;
gint idx;
AppSinkSrcData *data = NULL;
g_return_val_if_fail (GST_IS_RTSP_MEDIA (media), NULL);
g_return_val_if_fail (GST_IS_ELEMENT (payloader), NULL);
@ -1890,12 +1972,71 @@ gst_rtsp_media_create_stream (GstRTSPMedia * media, GstElement * payloader,
else
name = g_strdup_printf ("sink_%u", idx);
ghostpad = gst_ghost_pad_new (name, pad);
gst_pad_set_active (ghostpad, TRUE);
gst_element_add_pad (priv->element, ghostpad);
if ((GST_PAD_IS_SRC (pad) && priv->element->numsinkpads > 0) ||
(GST_PAD_IS_SINK (pad) && priv->element->numsrcpads > 0)) {
GstElement *appsink, *appsrc;
GstPad *sinkpad, *srcpad;
appsink = gst_element_factory_make ("appsink", NULL);
appsrc = gst_element_factory_make ("appsrc", NULL);
if (GST_PAD_IS_SINK (pad)) {
srcpad = gst_element_get_static_pad (appsrc, "src");
gst_bin_add (GST_BIN (priv->element), appsrc);
gst_pad_link (srcpad, pad);
gst_object_unref (srcpad);
streampad = gst_element_get_static_pad (appsink, "sink");
priv->pending_pipeline_elements =
g_list_prepend (priv->pending_pipeline_elements, appsink);
} else {
sinkpad = gst_element_get_static_pad (appsink, "sink");
gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
streampad = gst_element_get_static_pad (appsrc, "src");
priv->pending_pipeline_elements =
g_list_prepend (priv->pending_pipeline_elements, appsrc);
}
g_object_set (appsrc, "block", TRUE, "format", GST_FORMAT_TIME, "is-live",
TRUE, NULL);
g_object_set (appsink, "sync", FALSE, "async", FALSE, NULL);
data = g_new0 (AppSinkSrcData, 1);
data->appsink = appsink;
data->appsrc = appsrc;
sinkpad = gst_element_get_static_pad (appsink, "sink");
gst_pad_add_probe (sinkpad,
GST_PAD_PROBE_TYPE_EVENT_UPSTREAM | GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM,
appsink_pad_probe, data, NULL);
gst_object_unref (sinkpad);
srcpad = gst_element_get_static_pad (appsrc, "src");
gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_QUERY_UPSTREAM,
appsrc_pad_probe, data, NULL);
gst_object_unref (srcpad);
gst_app_sink_set_callbacks (GST_APP_SINK (appsink), &appsink_callbacks,
data, NULL);
g_object_set_data_full (G_OBJECT (streampad), "media-appsink-appsrc", data,
g_free);
} else {
streampad = gst_ghost_pad_new (name, pad);
gst_pad_set_active (streampad, TRUE);
gst_element_add_pad (priv->element, streampad);
}
g_free (name);
stream = gst_rtsp_stream_new (idx, payloader, ghostpad);
stream = gst_rtsp_stream_new (idx, payloader, streampad);
if (data)
data->stream = stream;
if (priv->pool)
gst_rtsp_stream_set_address_pool (stream, priv->pool);
gst_rtsp_stream_set_multicast_iface (stream, priv->multicast_iface);
@ -1943,13 +2084,28 @@ gst_rtsp_media_remove_stream (GstRTSPMedia * media, GstRTSPStream * stream)
{
GstRTSPMediaPrivate *priv;
GstPad *srcpad;
AppSinkSrcData *data;
priv = media->priv;
g_mutex_lock (&priv->lock);
/* remove the ghostpad */
srcpad = gst_rtsp_stream_get_srcpad (stream);
gst_element_remove_pad (priv->element, srcpad);
data = g_object_get_data (G_OBJECT (srcpad), "media-appsink-appsrc");
if (data) {
if (GST_OBJECT_PARENT (data->appsrc) == GST_OBJECT_CAST (priv->pipeline))
gst_bin_remove (GST_BIN_CAST (priv->pipeline), data->appsrc);
else if (GST_OBJECT_PARENT (data->appsrc) ==
GST_OBJECT_CAST (priv->element))
gst_bin_remove (GST_BIN_CAST (priv->element), data->appsrc);
if (GST_OBJECT_PARENT (data->appsink) == GST_OBJECT_CAST (priv->pipeline))
gst_bin_remove (GST_BIN_CAST (priv->pipeline), data->appsink);
else if (GST_OBJECT_PARENT (data->appsink) ==
GST_OBJECT_CAST (priv->element))
gst_bin_remove (GST_BIN_CAST (priv->element), data->appsink);
} else {
gst_element_remove_pad (priv->element, srcpad);
}
gst_object_unref (srcpad);
/* now remove the stream */
g_object_ref (stream);