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/* GStreamer
*
* example program for the ipcpipelinesrc/ipcpipelinesink elements
*
* Copyright (C) 2015-2017 YouView TV Ltd
* Author: Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
*
* 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.
*/
/*
* This program shows a moving ball on a video sink, with the video sink
* running in a different process than videotestsrc.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define _GNU_SOURCE
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <gst/gst.h>
static GMainLoop *loop = NULL;
static gboolean
master_bus_msg (GstBus * bus, GstMessage * msg, gpointer data)
{
GstPipeline *pipeline = data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ERROR:{
GError *err;
gchar *dbg;
gst_message_parse_error (msg, &err, &dbg);
g_printerr ("ERROR: %s\n", err->message);
if (dbg != NULL)
g_printerr ("ERROR debug information: %s\n", dbg);
g_error_free (err);
g_free (dbg);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "ipc.error");
g_main_loop_quit (loop);
break;
}
case GST_MESSAGE_WARNING:{
GError *err;
gchar *dbg;
gst_message_parse_warning (msg, &err, &dbg);
g_printerr ("WARNING: %s\n", err->message);
if (dbg != NULL)
g_printerr ("WARNING debug information: %s\n", dbg);
g_error_free (err);
g_free (dbg);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "ipc.warning");
break;
}
case GST_MESSAGE_ASYNC_DONE:
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "ipc.async-done");
break;
case GST_MESSAGE_EOS:
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
g_main_loop_quit (loop);
break;
default:
break;
}
return TRUE;
}
static void
start_source (int fdin, int fdout)
{
GstElement *pipeline;
GstElement *source, *ipcpipelinesink, *capsfilter;
GstCaps *caps;
pipeline = gst_pipeline_new (NULL);
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), master_bus_msg, pipeline);
source = gst_element_factory_make ("videotestsrc", NULL);
g_object_set (source, "pattern", 18, "num-buffers", 50, NULL);
capsfilter = gst_element_factory_make ("capsfilter", NULL);
caps =
gst_caps_new_simple ("video/x-raw", "width", G_TYPE_INT, 640, "height",
G_TYPE_INT, 480, NULL);
g_object_set (capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
ipcpipelinesink = gst_element_factory_make ("ipcpipelinesink", NULL);
g_object_set (ipcpipelinesink, "fdin", fdin, "fdout", fdout, NULL);
gst_bin_add_many (GST_BIN (pipeline), source, capsfilter, ipcpipelinesink,
NULL);
gst_element_link_many (source, capsfilter, ipcpipelinesink, NULL);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "ipc.src");
}
static void
start_sink (int fdin, int fdout)
{
GstElement *pipeline;
GstElement *ipcpipelinesrc, *navseek, *sink;
pipeline = gst_element_factory_make ("ipcslavepipeline", NULL);
ipcpipelinesrc = gst_element_factory_make ("ipcpipelinesrc", NULL);
navseek = gst_element_factory_make ("navseek", NULL);
g_object_set (navseek, "seek-offset", 1.0, NULL);
sink = gst_element_factory_make ("autovideosink", NULL);
g_object_set (ipcpipelinesrc, "fdin", fdin, "fdout", fdout, NULL);
gst_bin_add_many (GST_BIN (pipeline), ipcpipelinesrc, navseek, sink, NULL);
gst_element_link_many (ipcpipelinesrc, navseek, sink, NULL);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "ipc.sink");
/* The state of the slave pipeline will change together with the state
* of the master, there is no need to call gst_element_set_state() here */
}
static void
run (pid_t pid)
{
loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (loop);
if (pid > 0)
kill (pid, SIGTERM);
}
int
main (int argc, char **argv)
{
int sockets[2];
pid_t pid;
if (socketpair (AF_UNIX, SOCK_STREAM, 0, sockets)) {
fprintf (stderr, "Error creating sockets: %s\n", strerror (errno));
return 1;
}
if (fcntl (sockets[0], F_SETFL, O_NONBLOCK) < 0 ||
fcntl (sockets[1], F_SETFL, O_NONBLOCK) < 0) {
fprintf (stderr, "Error setting O_NONBLOCK on sockets: %s\n",
strerror (errno));
return 1;
}
pid = fork ();
if (pid < 0) {
fprintf (stderr, "Error forking: %s\n", strerror (errno));
return 1;
} else if (pid > 0) {
setenv ("GST_DEBUG_FILE", "gstsrc.log", 1);
gst_init (&argc, &argv);
start_source (sockets[0], sockets[0]);
} else {
setenv ("GST_DEBUG_FILE", "gstsink.log", 1);
gst_init (&argc, &argv);
start_sink (sockets[1], sockets[1]);
}
run (pid);
return 0;
}
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