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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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257 lines
8.1 KiB
C
257 lines
8.1 KiB
C
/* GStreamer Stream Combiner
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* Copyright (C) 2010 Edward Hervey <edward.hervey@collabora.co.uk>
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* (C) 2009 Nokia Corporation
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 "gststreamcombiner.h"
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static GstStaticPadTemplate src_template =
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GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS_ANY);
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GST_DEBUG_CATEGORY_STATIC (gst_stream_combiner_debug);
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#define GST_CAT_DEFAULT gst_stream_combiner_debug
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G_DEFINE_TYPE (GstStreamCombiner, gst_stream_combiner, GST_TYPE_ELEMENT);
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#define STREAMS_LOCK(obj) (g_mutex_lock(&obj->lock))
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#define STREAMS_UNLOCK(obj) (g_mutex_unlock(&obj->lock))
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static void gst_stream_combiner_finalize (GObject * object);
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static GstPad *gst_stream_combiner_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
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static void gst_stream_combiner_release_pad (GstElement * element,
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GstPad * pad);
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static void
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gst_stream_combiner_class_init (GstStreamCombinerClass * klass)
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{
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GObjectClass *gobject_klass;
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GstElementClass *gstelement_klass;
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gobject_klass = (GObjectClass *) klass;
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gstelement_klass = (GstElementClass *) klass;
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gobject_klass->finalize = gst_stream_combiner_finalize;
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GST_DEBUG_CATEGORY_INIT (gst_stream_combiner_debug, "streamcombiner", 0,
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"Stream Combiner");
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gst_element_class_add_pad_template (gstelement_klass,
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gst_static_pad_template_get (&src_template));
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gst_element_class_add_pad_template (gstelement_klass,
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gst_static_pad_template_get (&sink_template));
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gstelement_klass->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_stream_combiner_request_new_pad);
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gstelement_klass->release_pad =
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GST_DEBUG_FUNCPTR (gst_stream_combiner_release_pad);
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gst_element_class_set_static_metadata (gstelement_klass,
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"streamcombiner", "Generic",
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"Recombines streams splitted by the streamsplitter element",
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"Edward Hervey <edward.hervey@collabora.co.uk>");
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}
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static void
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gst_stream_combiner_finalize (GObject * object)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) object;
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g_mutex_clear (&stream_combiner->lock);
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G_OBJECT_CLASS (gst_stream_combiner_parent_class)->finalize (object);
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}
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static GstFlowReturn
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gst_stream_combiner_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) parent;
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/* FIXME : IMPLEMENT */
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/* with lock taken, check if we're the active stream, if not drop */
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return gst_pad_push (stream_combiner->srcpad, buf);
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}
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static gboolean
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gst_stream_combiner_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) parent;
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/* FIXME : IMPLEMENT */
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GST_DEBUG_OBJECT (pad, "Got event %s", GST_EVENT_TYPE_NAME (event));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CUSTOM_DOWNSTREAM:
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if (gst_event_has_name (event, "stream-switching-eos")) {
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gst_event_unref (event);
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event = gst_event_new_eos ();
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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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/* SEGMENT : lock, wait for other stream to EOS, select stream, unlock, push */
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/* EOS : lock, mark pad as unused, unlock , drop event */
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/* CUSTOM_REAL_EOS : push EOS downstream */
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/* FLUSH_START : lock, mark as flushing, unlock. if wasn't flushing forward */
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/* FLUSH_STOP : lock, unmark as flushing, unlock, if was flushing forward */
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/* OTHER : if selected pad forward */
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return gst_pad_push_event (stream_combiner->srcpad, event);
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}
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static gboolean
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gst_stream_combiner_sink_query (GstPad * pad, GstObject * parent,
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GstQuery * query)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) parent;
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return gst_pad_peer_query (stream_combiner->srcpad, query);
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}
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static gboolean
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gst_stream_combiner_src_event (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) parent;
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GstPad *sinkpad = NULL;
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STREAMS_LOCK (stream_combiner);
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if (stream_combiner->current)
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sinkpad = stream_combiner->current;
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else if (stream_combiner->sinkpads)
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sinkpad = (GstPad *) stream_combiner->sinkpads->data;
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STREAMS_UNLOCK (stream_combiner);
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if (sinkpad)
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/* Forward upstream as is */
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return gst_pad_push_event (sinkpad, event);
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return FALSE;
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}
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static gboolean
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gst_stream_combiner_src_query (GstPad * pad, GstObject * parent,
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GstQuery * query)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) parent;
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GstPad *sinkpad = NULL;
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gboolean ret = FALSE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CAPS:
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ret = gst_pad_query_default (pad, parent, query);
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break;
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default:
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STREAMS_LOCK (stream_combiner);
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if (stream_combiner->current)
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sinkpad = stream_combiner->current;
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else if (stream_combiner->sinkpads)
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sinkpad = (GstPad *) stream_combiner->sinkpads->data;
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STREAMS_UNLOCK (stream_combiner);
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if (sinkpad)
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/* Forward upstream as is */
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ret = gst_pad_peer_query (sinkpad, query);
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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_stream_combiner_init (GstStreamCombiner * stream_combiner)
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{
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stream_combiner->srcpad =
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gst_pad_new_from_static_template (&src_template, "src");
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gst_pad_set_event_function (stream_combiner->srcpad,
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gst_stream_combiner_src_event);
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gst_pad_set_query_function (stream_combiner->srcpad,
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gst_stream_combiner_src_query);
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gst_element_add_pad (GST_ELEMENT (stream_combiner), stream_combiner->srcpad);
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g_mutex_init (&stream_combiner->lock);
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}
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static GstPad *
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gst_stream_combiner_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) element;
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GstPad *sinkpad;
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GST_DEBUG_OBJECT (element, "templ:%p, name:%s", templ, name);
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sinkpad = gst_pad_new_from_static_template (&sink_template, name);
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gst_pad_set_chain_function (sinkpad, gst_stream_combiner_chain);
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gst_pad_set_event_function (sinkpad, gst_stream_combiner_sink_event);
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gst_pad_set_query_function (sinkpad, gst_stream_combiner_sink_query);
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STREAMS_LOCK (stream_combiner);
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stream_combiner->sinkpads =
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g_list_append (stream_combiner->sinkpads, sinkpad);
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gst_pad_set_active (sinkpad, TRUE);
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gst_element_add_pad (element, sinkpad);
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stream_combiner->cookie++;
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STREAMS_UNLOCK (stream_combiner);
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GST_DEBUG_OBJECT (element, "Returning pad %p", sinkpad);
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return sinkpad;
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}
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static void
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gst_stream_combiner_release_pad (GstElement * element, GstPad * pad)
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{
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GstStreamCombiner *stream_combiner = (GstStreamCombiner *) element;
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GList *tmp;
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GST_DEBUG_OBJECT (element, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
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STREAMS_LOCK (stream_combiner);
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tmp = g_list_find (stream_combiner->sinkpads, pad);
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if (tmp) {
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GstPad *pad = (GstPad *) tmp->data;
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stream_combiner->sinkpads =
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g_list_delete_link (stream_combiner->sinkpads, tmp);
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stream_combiner->cookie++;
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if (pad == stream_combiner->current) {
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/* Deactivate current flow */
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GST_DEBUG_OBJECT (element, "Removed pad was the current one");
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stream_combiner->current = NULL;
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}
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GST_DEBUG_OBJECT (element, "Removing pad from ourself");
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gst_element_remove_pad (element, pad);
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}
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STREAMS_UNLOCK (stream_combiner);
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return;
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}
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