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b53f682d75
This can read from an SDP file or get the SDP data via property. Works around the problem that sdpdemux inside decodebin fails because the GST_STATE_CHANGE_NO_PREROLL is not observed by the pipeline. See https://bugzilla.gnome.org/show_bug.cgi?id=702495 https://bugzilla.gnome.org/show_bug.cgi?id=762860
332 lines
9.1 KiB
C
332 lines
9.1 KiB
C
/*
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* Copyright (C) 2016 Sebastian Dröge <sebastian@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstsdpsrc.h"
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#include <gst/app/app.h>
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (sdp_src_debug);
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#define GST_CAT_DEFAULT sdp_src_debug
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("stream_%u",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS ("application/x-rtp"));
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enum
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{
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PROP_0,
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PROP_LOCATION,
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PROP_SDP
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};
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static void gst_sdp_src_handler_init (gpointer g_iface, gpointer iface_data);
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#define gst_sdp_src_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstSdpSrc, gst_sdp_src, GST_TYPE_BIN,
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G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_sdp_src_handler_init));
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static void
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gst_sdp_src_finalize (GObject * object)
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{
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GstSdpSrc *self = GST_SDP_SRC_CAST (object);
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if (self->sdp_buffer)
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gst_buffer_unref (self->sdp_buffer);
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g_free (self->location);
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g_free (self->sdp);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_sdp_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstSdpSrc *self = GST_SDP_SRC_CAST (object);
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switch (prop_id) {
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case PROP_LOCATION:
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g_value_set_string (value, self->location);
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break;
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case PROP_SDP:
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g_value_set_string (value, self->sdp);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_sdp_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSdpSrc *self = GST_SDP_SRC_CAST (object);
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switch (prop_id) {
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case PROP_LOCATION:
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g_free (self->location);
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self->location = g_value_dup_string (value);
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break;
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case PROP_SDP:
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g_free (self->sdp);
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self->sdp = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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pad_added_cb (GstElement * element, GstPad * pad, gpointer user_data)
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{
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GstSdpSrc *self = GST_SDP_SRC_CAST (user_data);
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GstPad *ghost;
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ghost =
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gst_ghost_pad_new_from_template (GST_PAD_NAME (pad), pad,
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gst_static_pad_template_get (&src_template));
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gst_pad_set_active (ghost, TRUE);
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gst_element_add_pad (GST_ELEMENT_CAST (self), ghost);
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}
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static void
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pad_removed_cb (GstElement * element, GstPad * pad, gpointer user_data)
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{
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GstSdpSrc *self = GST_SDP_SRC_CAST (user_data);
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GstPad *peer;
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peer = gst_pad_get_peer (pad);
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if (peer) {
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GstPad *ghost =
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GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD (peer)));
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if (ghost) {
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gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (ghost), NULL);
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gst_element_remove_pad (GST_ELEMENT_CAST (self), ghost);
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gst_object_unref (ghost);
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}
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gst_object_unref (peer);
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}
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}
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static void
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no_more_pads_cb (GstElement * element, gpointer user_data)
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{
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gst_element_no_more_pads (GST_ELEMENT_CAST (user_data));
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}
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static void
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remove_pad (const GValue * item, gpointer user_data)
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{
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GstElement *self = user_data;
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GstPad *pad = g_value_get_object (item);
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gst_element_remove_pad (self, pad);
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}
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static GstStateChangeReturn
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gst_sdp_src_change_state (GstElement * element, GstStateChange transition)
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{
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GstSdpSrc *self = GST_SDP_SRC_CAST (element);
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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GST_OBJECT_LOCK (self);
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if (self->sdp_buffer)
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gst_buffer_unref (self->sdp_buffer);
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self->sdp_buffer = NULL;
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if (self->location && strcmp (self->location, "sdp://") != 0) {
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/* Do nothing */
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} else if (self->sdp) {
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self->sdp_buffer =
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gst_buffer_new_wrapped (self->sdp, strlen (self->sdp) + 1);
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} else {
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ret = GST_STATE_CHANGE_FAILURE;
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}
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GST_OBJECT_UNLOCK (self);
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if (ret != GST_STATE_CHANGE_FAILURE) {
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if (self->sdp_buffer) {
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GstCaps *caps = gst_caps_new_empty_simple ("application/sdp");
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self->src = gst_element_factory_make ("appsrc", NULL);
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g_object_set (self->src, "caps", caps, "emit-signals", FALSE, NULL);
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gst_caps_unref (caps);
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} else {
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self->src = gst_element_factory_make ("filesrc", NULL);
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g_object_set (self->src, "location", self->location + 6, NULL);
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}
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self->demux = gst_element_factory_make ("sdpdemux", NULL);
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g_signal_connect (self->demux, "pad-added", G_CALLBACK (pad_added_cb),
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self);
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g_signal_connect (self->demux, "pad-removed",
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G_CALLBACK (pad_removed_cb), self);
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g_signal_connect (self->demux, "no-more-pads",
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G_CALLBACK (no_more_pads_cb), self);
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gst_bin_add_many (GST_BIN_CAST (self), self->src, self->demux, NULL);
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gst_element_link_pads (self->src, "src", self->demux, "sink");
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}
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break;
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default:
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break;
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}
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:{
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GstIterator *it;
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it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (self));
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while (gst_iterator_foreach (it, remove_pad, self) == GST_ITERATOR_RESYNC)
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gst_iterator_resync (it);
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gst_iterator_free (it);
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if (self->src) {
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gst_bin_remove (GST_BIN_CAST (self), self->src);
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self->src = NULL;
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}
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if (self->demux) {
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gst_bin_remove (GST_BIN_CAST (self), self->demux);
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self->demux = NULL;
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}
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break;
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}
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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if (ret != GST_STATE_CHANGE_FAILURE)
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ret = GST_STATE_CHANGE_NO_PREROLL;
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if (self->sdp_buffer) {
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if (gst_app_src_push_buffer (GST_APP_SRC_CAST (self->src),
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gst_buffer_ref (self->sdp_buffer)) != GST_FLOW_OK)
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ret = GST_STATE_CHANGE_FAILURE;
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else
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gst_app_src_end_of_stream (GST_APP_SRC_CAST (self->src));
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}
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break;
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default:
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break;
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}
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return ret;
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}
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static void
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gst_sdp_src_class_init (GstSdpSrcClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *element_class = (GstElementClass *) klass;
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GST_DEBUG_CATEGORY_INIT (sdp_src_debug, "sdpsrc", 0, "SDP Source");
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gobject_class->finalize = gst_sdp_src_finalize;
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gobject_class->set_property = gst_sdp_src_set_property;
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gobject_class->get_property = gst_sdp_src_get_property;
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g_object_class_install_property (gobject_class, PROP_LOCATION,
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g_param_spec_string ("location",
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"Location",
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"URI to SDP file (sdp:///path/to/file)", NULL,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_SDP,
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g_param_spec_string ("sdp",
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"SDP",
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"SDP description used instead of location", NULL,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_static_metadata (element_class, "SDP Source",
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"Source/Network/RTP",
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"Stream RTP based on an SDP",
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"Sebastian Dröge <sebastian@centricular.com>");
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_sdp_src_change_state);
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}
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static void
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gst_sdp_src_init (GstSdpSrc * self)
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{
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}
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static GstURIType
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gst_sdp_src_get_uri_type (GType type)
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{
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return GST_URI_SRC;
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}
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static const gchar *const *
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gst_sdp_src_get_protocols (GType type)
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{
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static const gchar *protocols[] = { "sdp", 0 };
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return protocols;
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}
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static gchar *
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gst_sdp_src_get_uri (GstURIHandler * handler)
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{
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gchar *uri = NULL;
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g_object_get (handler, "location", &uri, NULL);
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return uri;
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}
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static gboolean
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gst_sdp_src_set_uri (GstURIHandler * handler, const gchar * uri,
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GError ** error)
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{
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if (uri && !g_str_has_prefix (uri, "sdp://")) {
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g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
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"Invalid SDP URI");
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return FALSE;
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}
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g_object_set (handler, "location", uri, NULL);
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return TRUE;
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}
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static void
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gst_sdp_src_handler_init (gpointer g_iface, gpointer iface_data)
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{
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GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
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iface->get_type = gst_sdp_src_get_uri_type;
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iface->get_protocols = gst_sdp_src_get_protocols;
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iface->get_uri = gst_sdp_src_get_uri;
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iface->set_uri = gst_sdp_src_set_uri;
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}
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