mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 11:11:08 +00:00
122 lines
4 KiB
C
122 lines
4 KiB
C
/* GStreamer
|
|
* Copyright (C) 2015-2017 YouView TV Ltd
|
|
* Author: Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
|
|
*
|
|
* gstipcslavepipeline.c:
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
/**
|
|
* SECTION:element-ipcslavepipeline
|
|
* @see_also: #GstIpcPipelineSink, #GstIpcPipelineSrc
|
|
*
|
|
* This is a GstPipeline subclass meant to embed one ore more ipcpipelinesrc
|
|
* elements, and be slaved transparently to the master pipeline, using one ore
|
|
* more ipcpipelinesink elements on the master.
|
|
*
|
|
* The actual pipeline slaving logic happens in ipcpipelinesrc. The only thing
|
|
* that this class actually does is that it watches the pipeline bus for
|
|
* messages and forwards them to the master pipeline through the ipcpipelinesrc
|
|
* elements that it contains.
|
|
*
|
|
* For more details about this mechanism and its uses, see the documentation
|
|
* of the ipcpipelinesink element.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#include "gstipcpipelinesrc.h"
|
|
#include "gstipcslavepipeline.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_ipcslavepipeline_debug);
|
|
#define GST_CAT_DEFAULT gst_ipcslavepipeline_debug
|
|
|
|
#define _do_init \
|
|
GST_DEBUG_CATEGORY_INIT (gst_ipcslavepipeline_debug, "ipcslavepipeline", 0, "ipcslavepipeline element");
|
|
#define gst_ipc_slave_pipeline_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_CODE (GstIpcSlavePipeline, gst_ipc_slave_pipeline,
|
|
GST_TYPE_PIPELINE, _do_init);
|
|
|
|
static gboolean gst_ipc_slave_pipeline_post_message (GstElement * element,
|
|
GstMessage * message);
|
|
|
|
static void
|
|
gst_ipc_slave_pipeline_class_init (GstIpcSlavePipelineClass * klass)
|
|
{
|
|
GstElementClass *element_class;
|
|
|
|
element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
element_class->post_message = gst_ipc_slave_pipeline_post_message;
|
|
|
|
gst_element_class_set_static_metadata (element_class,
|
|
"Inter-process slave pipeline",
|
|
"Generic/Bin/Slave",
|
|
"Contains the slave part of an inter-process pipeline",
|
|
"Vincent Penquerc'h <vincent.penquerch@collabora.co.uk");
|
|
}
|
|
|
|
static void
|
|
gst_ipc_slave_pipeline_init (GstIpcSlavePipeline * isp)
|
|
{
|
|
}
|
|
|
|
static gboolean
|
|
send_message_if_ipcpipelinesrc (const GValue * v, GValue * r,
|
|
gpointer user_data)
|
|
{
|
|
GstElement *e;
|
|
GType et;
|
|
gboolean ret;
|
|
GstMessage *message = user_data;
|
|
|
|
e = g_value_get_object (v);
|
|
et = gst_element_factory_get_element_type (gst_element_get_factory (e));
|
|
if (et == GST_TYPE_IPC_PIPELINE_SRC) {
|
|
g_signal_emit_by_name (G_OBJECT (e), "forward-message", message, &ret);
|
|
|
|
/* if we succesfully sent this to the master and it's not ASYNC_DONE or EOS,
|
|
* we can skip sending it again through the other ipcpipelinesrcs */
|
|
if (ret && GST_MESSAGE_TYPE (message) != GST_MESSAGE_ASYNC_DONE &&
|
|
GST_MESSAGE_TYPE (message) != GST_MESSAGE_EOS)
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_ipc_slave_pipeline_forward_message (GstIpcSlavePipeline * pipeline,
|
|
GstMessage * message)
|
|
{
|
|
GstIterator *it;
|
|
|
|
it = gst_bin_iterate_sources (GST_BIN (pipeline));
|
|
gst_iterator_fold (it, send_message_if_ipcpipelinesrc, NULL, message);
|
|
gst_iterator_free (it);
|
|
}
|
|
|
|
static gboolean
|
|
gst_ipc_slave_pipeline_post_message (GstElement * element, GstMessage * message)
|
|
{
|
|
gst_ipc_slave_pipeline_forward_message (GST_IPC_SLAVE_PIPELINE
|
|
(element), message);
|
|
|
|
return GST_ELEMENT_CLASS (parent_class)->post_message (element, message);
|
|
}
|