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Listen for eos and error signal to quit main loop. https://bugzilla.gnome.org/show_bug.cgi?id=739346
213 lines
5.6 KiB
C
213 lines
5.6 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <stdlib.h>
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static GMainLoop *loop;
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static GstElement *
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gen_video_element (void)
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{
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GstElement *element;
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GstElement *conv;
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GstElement *sink;
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GstPad *pad;
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element = gst_bin_new ("vbin");
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conv = gst_element_factory_make ("videoconvert", "conv");
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sink = gst_element_factory_make (DEFAULT_VIDEOSINK, "sink");
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g_assert (sink);
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gst_bin_add (GST_BIN (element), conv);
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gst_bin_add (GST_BIN (element), sink);
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gst_element_link_pads (conv, "src", sink, "sink");
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pad = gst_element_get_static_pad (conv, "sink");
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gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
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gst_object_unref (pad);
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return element;
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}
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static GstElement *
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gen_audio_element (void)
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{
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GstElement *element;
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GstElement *conv;
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GstElement *sink;
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GstPad *pad;
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element = gst_bin_new ("abin");
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conv = gst_element_factory_make ("audioconvert", "conv");
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sink = gst_element_factory_make (DEFAULT_AUDIOSINK, "sink");
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g_assert (sink);
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gst_bin_add (GST_BIN (element), conv);
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gst_bin_add (GST_BIN (element), sink);
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gst_element_link_pads (conv, "src", sink, "sink");
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pad = gst_element_get_static_pad (conv, "sink");
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gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
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gst_object_unref (pad);
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return element;
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}
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static void
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pad_added_cb (GstElement * decodebin, GstPad * pad, gpointer data)
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{
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GstCaps *caps;
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GstStructure *str;
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GstPad *sinkpad;
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GstElement *sink;
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GstElement *pipeline;
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const gchar *name;
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GstStateChangeReturn ret;
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GstPadLinkReturn lret;
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/* check media type */
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caps = gst_pad_query_caps (pad, NULL);
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str = gst_caps_get_structure (caps, 0);
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name = gst_structure_get_name (str);
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g_print ("name: %s\n", name);
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if (g_strrstr (name, "audio")) {
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sink = gen_audio_element ();
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} else if (g_strrstr (name, "video")) {
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sink = gen_video_element ();
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} else {
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sink = NULL;
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}
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gst_caps_unref (caps);
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if (sink) {
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pipeline = GST_ELEMENT_CAST (data);
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/* add new sink to the pipeline */
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gst_bin_add (GST_BIN_CAST (pipeline), sink);
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/* set the new sink tp PAUSED as well */
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ret = gst_element_set_state (sink, GST_STATE_PAUSED);
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if (ret == GST_STATE_CHANGE_FAILURE)
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goto state_error;
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/* get the ghostpad of the sink bin */
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sinkpad = gst_element_get_static_pad (sink, "sink");
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/* link'n'play */
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lret = gst_pad_link (pad, sinkpad);
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if (lret != GST_PAD_LINK_OK)
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goto link_failed;
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gst_object_unref (sinkpad);
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}
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return;
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/* ERRORS */
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state_error:
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{
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gst_bin_remove (GST_BIN_CAST (pipeline), sink);
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g_warning ("could not change state of new sink (%d)", ret);
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return;
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}
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link_failed:
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{
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g_warning ("could not link pad and sink (%d)", lret);
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return;
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}
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}
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static void
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error_eos_cb (GstBus * bus, GstMessage * msg, GMainLoop * main_loop)
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{
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g_main_loop_quit (main_loop);
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}
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gint
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main (gint argc, gchar * argv[])
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{
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GstElement *pipeline, *filesrc, *decodebin;
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GstStateChangeReturn res;
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GstBus *bus;
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gst_init (&argc, &argv);
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pipeline = gst_pipeline_new ("pipeline");
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filesrc = gst_element_factory_make ("filesrc", "filesrc");
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g_assert (filesrc);
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decodebin = gst_element_factory_make ("decodebin", "decodebin");
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g_assert (decodebin);
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loop = g_main_loop_new (NULL, TRUE);
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bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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gst_bus_add_signal_watch (bus);
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g_signal_connect (bus, "message::eos", G_CALLBACK (error_eos_cb), loop);
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g_signal_connect (bus, "message::error", G_CALLBACK (error_eos_cb), loop);
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g_signal_connect (G_OBJECT (decodebin), "pad-added",
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G_CALLBACK (pad_added_cb), pipeline);
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gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);
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gst_element_link (filesrc, decodebin);
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if (argc < 2) {
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g_print ("usage: %s <uri>\n", argv[0]);
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exit (-1);
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}
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if (!g_str_has_prefix (argv[1], "file://")) {
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g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
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} else {
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g_object_set (G_OBJECT (filesrc), "location", argv[1] + 7, NULL);
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}
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/* set to paused, decodebin will autoplug and signal new_pad callbacks */
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res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
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if (res == GST_STATE_CHANGE_FAILURE) {
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g_print ("could not pause\n");
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return -1;
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}
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/* wait for paused to complete */
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res = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
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if (res == GST_STATE_CHANGE_FAILURE) {
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g_print ("could not pause\n");
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return -1;
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}
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/* play, now all the sinks are added to the pipeline and are prerolled and
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* ready to play. */
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res = gst_element_set_state (pipeline, GST_STATE_PLAYING);
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if (res == GST_STATE_CHANGE_FAILURE) {
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g_print ("could not play\n");
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return -1;
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}
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/* go in the mainloop now */
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g_main_loop_run (loop);
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return 0;
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}
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