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a5044fa1f9
Select the clock time to be used as NTP time source. This allows proper synchronization between receivers, independent of sharing base times, and just requires them to use the same clock.
143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/* GStreamer
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* Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
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* Copyright (C) 2014 Jan Schmidt <jan@centricular.com>
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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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#include <stdlib.h>
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#include <gst/gst.h>
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#include <gst/net/gstnet.h>
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#define PLAYBACK_DELAY_MS 40
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static void
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source_created (GstElement * pipe, GstElement * source)
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{
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g_object_set (source, "latency", PLAYBACK_DELAY_MS,
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"ntp-time-source", 3, "buffer-mode", 4, "ntp-sync", TRUE, NULL);
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}
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static gboolean
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message (GstBus * bus, GstMessage * message, gpointer user_data)
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{
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GMainLoop *loop = user_data;
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:{
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GError *err = NULL;
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gchar *name, *debug = NULL;
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name = gst_object_get_path_string (message->src);
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gst_message_parse_error (message, &err, &debug);
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g_printerr ("ERROR: from element %s: %s\n", name, err->message);
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if (debug != NULL)
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g_printerr ("Additional debug info:\n%s\n", debug);
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g_error_free (err);
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g_free (debug);
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g_free (name);
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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 = NULL;
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gchar *name, *debug = NULL;
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name = gst_object_get_path_string (message->src);
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gst_message_parse_warning (message, &err, &debug);
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g_printerr ("ERROR: from element %s: %s\n", name, err->message);
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if (debug != NULL)
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g_printerr ("Additional debug info:\n%s\n", debug);
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g_error_free (err);
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g_free (debug);
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g_free (name);
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break;
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}
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case GST_MESSAGE_EOS:
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g_print ("Got EOS\n");
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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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int
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main (int argc, char *argv[])
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{
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GstClock *net_clock;
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gchar *server;
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gint clock_port;
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GstElement *pipe;
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GMainLoop *loop;
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gst_init (&argc, &argv);
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if (argc < 2) {
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g_print ("usage: %s rtsp://URI clock-IP clock-PORT\n"
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"example: %s rtsp://localhost:8554/test 127.0.0.1 8554\n",
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argv[0], argv[0]);
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return -1;
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}
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server = argv[2];
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clock_port = atoi (argv[3]);
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net_clock = gst_net_client_clock_new ("net_clock", server, clock_port, 0);
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if (net_clock == NULL) {
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g_print ("Failed to create net clock client for %s:%d\n",
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server, clock_port);
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return 1;
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}
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/* Wait for the clock to stabilise */
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gst_clock_wait_for_sync (net_clock, GST_CLOCK_TIME_NONE);
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loop = g_main_loop_new (NULL, FALSE);
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pipe = gst_element_factory_make ("playbin", NULL);
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g_object_set (pipe, "uri", argv[1], NULL);
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g_signal_connect (pipe, "source-setup", G_CALLBACK (source_created), NULL);
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gst_pipeline_use_clock (GST_PIPELINE (pipe), net_clock);
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if (gst_element_set_state (pipe,
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GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
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g_print ("Failed to set state to PLAYING\n");
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goto exit;
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};
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gst_bus_add_signal_watch (GST_ELEMENT_BUS (pipe));
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g_signal_connect (GST_ELEMENT_BUS (pipe), "message", G_CALLBACK (message),
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loop);
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g_main_loop_run (loop);
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exit:
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gst_element_set_state (pipe, GST_STATE_NULL);
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gst_object_unref (pipe);
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g_main_loop_unref (loop);
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return 0;
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}
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