da9e012e8a
Split plugin into features including dynamic types which can be indiviually registered during a static build. More details here: https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/199 https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/661 Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2116>
127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/* GStreamer
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* Copyright (C) 2015-2017 YouView TV Ltd
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* Author: Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
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*
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* gstipcslavepipeline.c:
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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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/**
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* SECTION:element-ipcslavepipeline
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* @see_also: #GstIpcPipelineSink, #GstIpcPipelineSrc
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*
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* This is a GstPipeline subclass meant to embed one ore more ipcpipelinesrc
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* elements, and be slaved transparently to the master pipeline, using one ore
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* more ipcpipelinesink elements on the master.
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*
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* The actual pipeline slaving logic happens in ipcpipelinesrc. The only thing
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* that this class actually does is that it watches the pipeline bus for
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* messages and forwards them to the master pipeline through the ipcpipelinesrc
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* elements that it contains.
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*
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* For more details about this mechanism and its uses, see the documentation
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* of the ipcpipelinesink element.
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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 <string.h>
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#include "gstipcpipelineelements.h"
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#include "gstipcpipelinesrc.h"
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#include "gstipcslavepipeline.h"
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GST_DEBUG_CATEGORY_STATIC (gst_ipcslavepipeline_debug);
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#define GST_CAT_DEFAULT gst_ipcslavepipeline_debug
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#define _do_init \
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GST_DEBUG_CATEGORY_INIT (gst_ipcslavepipeline_debug, "ipcslavepipeline", 0, "ipcslavepipeline element");
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#define gst_ipc_slave_pipeline_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstIpcSlavePipeline, gst_ipc_slave_pipeline,
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GST_TYPE_PIPELINE, _do_init);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (ipcslavepipeline, "ipcslavepipeline",
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GST_RANK_NONE, GST_TYPE_IPC_SLAVE_PIPELINE,
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icepipeline_element_init (plugin));
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static gboolean gst_ipc_slave_pipeline_post_message (GstElement * element,
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GstMessage * message);
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static void
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gst_ipc_slave_pipeline_class_init (GstIpcSlavePipelineClass * klass)
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{
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GstElementClass *element_class;
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element_class = GST_ELEMENT_CLASS (klass);
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element_class->post_message = gst_ipc_slave_pipeline_post_message;
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gst_element_class_set_static_metadata (element_class,
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"Inter-process slave pipeline",
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"Generic/Bin/Slave",
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"Contains the slave part of an inter-process pipeline",
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"Vincent Penquerc'h <vincent.penquerch@collabora.co.uk");
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}
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static void
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gst_ipc_slave_pipeline_init (GstIpcSlavePipeline * isp)
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{
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}
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static gboolean
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send_message_if_ipcpipelinesrc (const GValue * v, GValue * r,
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gpointer user_data)
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{
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GstElement *e;
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GType et;
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gboolean ret;
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GstMessage *message = user_data;
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e = g_value_get_object (v);
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et = gst_element_factory_get_element_type (gst_element_get_factory (e));
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if (et == GST_TYPE_IPC_PIPELINE_SRC) {
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g_signal_emit_by_name (G_OBJECT (e), "forward-message", message, &ret);
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/* if we successfully sent this to the master and it's not ASYNC_DONE or EOS,
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* we can skip sending it again through the other ipcpipelinesrcs */
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if (ret && GST_MESSAGE_TYPE (message) != GST_MESSAGE_ASYNC_DONE &&
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GST_MESSAGE_TYPE (message) != GST_MESSAGE_EOS)
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return FALSE;
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}
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return TRUE;
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}
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static void
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gst_ipc_slave_pipeline_forward_message (GstIpcSlavePipeline * pipeline,
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GstMessage * message)
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{
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GstIterator *it;
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it = gst_bin_iterate_sources (GST_BIN (pipeline));
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gst_iterator_fold (it, send_message_if_ipcpipelinesrc, NULL, message);
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gst_iterator_free (it);
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}
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static gboolean
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gst_ipc_slave_pipeline_post_message (GstElement * element, GstMessage * message)
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{
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gst_ipc_slave_pipeline_forward_message (GST_IPC_SLAVE_PIPELINE
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(element), message);
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return GST_ELEMENT_CLASS (parent_class)->post_message (element, message);
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}
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