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Use fcntl() instead to set O_NONBLOCK, which is portable. https://bugzilla.gnome.org/show_bug.cgi?id=786763
190 lines
5.5 KiB
C
190 lines
5.5 KiB
C
/* GStreamer
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*
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* example program for the ipcpipelinesrc/ipcpipelinesink elements
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*
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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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* 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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* This program shows a moving ball on a video sink, with the video sink
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* running in a different process than videotestsrc.
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*/
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#define _GNU_SOURCE
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <gst/gst.h>
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static GMainLoop *loop = NULL;
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static gboolean
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master_bus_msg (GstBus * bus, GstMessage * msg, gpointer data)
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{
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GstPipeline *pipeline = data;
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_ERROR:{
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GError *err;
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gchar *dbg;
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gst_message_parse_error (msg, &err, &dbg);
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g_printerr ("ERROR: %s\n", err->message);
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if (dbg != NULL)
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g_printerr ("ERROR debug information: %s\n", dbg);
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g_error_free (err);
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g_free (dbg);
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GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
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GST_DEBUG_GRAPH_SHOW_ALL, "ipc.error");
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g_main_loop_quit (loop);
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break;
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}
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case GST_MESSAGE_WARNING:{
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GError *err;
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gchar *dbg;
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gst_message_parse_warning (msg, &err, &dbg);
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g_printerr ("WARNING: %s\n", err->message);
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if (dbg != NULL)
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g_printerr ("WARNING debug information: %s\n", dbg);
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g_error_free (err);
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g_free (dbg);
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GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
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GST_DEBUG_GRAPH_SHOW_ALL, "ipc.warning");
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break;
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}
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case GST_MESSAGE_ASYNC_DONE:
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GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
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GST_DEBUG_GRAPH_SHOW_ALL, "ipc.async-done");
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break;
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case GST_MESSAGE_EOS:
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gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
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g_main_loop_quit (loop);
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break;
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default:
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break;
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}
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return TRUE;
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}
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static void
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start_source (int fdin, int fdout)
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{
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GstElement *pipeline;
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GstElement *source, *ipcpipelinesink, *capsfilter;
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GstCaps *caps;
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pipeline = gst_pipeline_new (NULL);
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gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), master_bus_msg, pipeline);
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source = gst_element_factory_make ("videotestsrc", NULL);
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g_object_set (source, "pattern", 18, "num-buffers", 50, NULL);
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capsfilter = gst_element_factory_make ("capsfilter", NULL);
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caps =
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gst_caps_new_simple ("video/x-raw", "width", G_TYPE_INT, 640, "height",
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G_TYPE_INT, 480, NULL);
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g_object_set (capsfilter, "caps", caps, NULL);
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gst_caps_unref (caps);
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ipcpipelinesink = gst_element_factory_make ("ipcpipelinesink", NULL);
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g_object_set (ipcpipelinesink, "fdin", fdin, "fdout", fdout, NULL);
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gst_bin_add_many (GST_BIN (pipeline), source, capsfilter, ipcpipelinesink,
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NULL);
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gst_element_link_many (source, capsfilter, ipcpipelinesink, NULL);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
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GST_DEBUG_GRAPH_SHOW_ALL, "ipc.src");
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}
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static void
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start_sink (int fdin, int fdout)
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{
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GstElement *pipeline;
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GstElement *ipcpipelinesrc, *navseek, *sink;
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pipeline = gst_element_factory_make ("ipcslavepipeline", NULL);
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ipcpipelinesrc = gst_element_factory_make ("ipcpipelinesrc", NULL);
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navseek = gst_element_factory_make ("navseek", NULL);
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g_object_set (navseek, "seek-offset", 1.0, NULL);
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sink = gst_element_factory_make ("autovideosink", NULL);
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g_object_set (ipcpipelinesrc, "fdin", fdin, "fdout", fdout, NULL);
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gst_bin_add_many (GST_BIN (pipeline), ipcpipelinesrc, navseek, sink, NULL);
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gst_element_link_many (ipcpipelinesrc, navseek, sink, NULL);
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GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
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GST_DEBUG_GRAPH_SHOW_ALL, "ipc.sink");
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/* The state of the slave pipeline will change together with the state
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* of the master, there is no need to call gst_element_set_state() here */
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}
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static void
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run (pid_t pid)
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{
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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if (pid > 0)
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kill (pid, SIGTERM);
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}
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int
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main (int argc, char **argv)
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{
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int sockets[2];
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pid_t pid;
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if (socketpair (AF_UNIX, SOCK_STREAM, 0, sockets)) {
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fprintf (stderr, "Error creating sockets: %s\n", strerror (errno));
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return 1;
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}
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if (fcntl (sockets[0], F_SETFL, O_NONBLOCK) < 0 ||
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fcntl (sockets[1], F_SETFL, O_NONBLOCK) < 0) {
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fprintf (stderr, "Error setting O_NONBLOCK on sockets: %s\n",
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strerror (errno));
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return 1;
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}
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pid = fork ();
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if (pid < 0) {
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fprintf (stderr, "Error forking: %s\n", strerror (errno));
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return 1;
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} else if (pid > 0) {
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setenv ("GST_DEBUG_FILE", "gstsrc.log", 1);
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gst_init (&argc, &argv);
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start_source (sockets[0], sockets[0]);
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} else {
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setenv ("GST_DEBUG_FILE", "gstsink.log", 1);
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gst_init (&argc, &argv);
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start_sink (sockets[1], sockets[1]);
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}
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run (pid);
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return 0;
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}
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