author | hgs |
Fri, 30 Apr 2010 19:11:56 -0500 | |
changeset 19 | 24ed0baaf8e5 |
parent 16 | 8e837d1bf446 |
child 30 | 7e817e7e631c |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
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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., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, 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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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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#ifdef HAVE_STDLIB_H |
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#include <stdlib.h> /* exit */ |
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#endif |
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#include <gst/gst.h> |
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static GMainLoop *loop; |
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|
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static void |
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new_pad (GstElement * element, GstPad * pad, gboolean last, GstElement * sink) |
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{ |
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g_print ("New pad...\n"); |
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} |
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|
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static void |
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no_more_pads (GstElement * element) |
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{ |
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g_print ("No more pads...\n"); |
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g_main_loop_quit (loop); |
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} |
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|
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static gboolean |
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start_finding (GstElement * pipeline) |
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{ |
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GstStateChangeReturn res; |
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g_print ("finding caps...\n"); |
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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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exit (-1); |
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} |
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return FALSE; |
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} |
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static void |
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dump_element_stats (GstElement * element) |
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{ |
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GstIterator *it; |
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gpointer data; |
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it = gst_element_iterate_src_pads (element); |
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while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) { |
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GstPad *pad = GST_PAD (data); |
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GstCaps *caps; |
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gchar *str; |
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GstQuery *query; |
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g_print ("stream %s:\n", GST_OBJECT_NAME (pad)); |
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caps = gst_pad_get_caps (pad); |
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str = gst_caps_to_string (caps); |
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g_print (" caps: %s\n", str); |
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g_free (str); |
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gst_caps_unref (caps); |
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query = gst_query_new_duration (GST_FORMAT_TIME); |
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if (gst_pad_query (pad, query)) { |
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gint64 duration; |
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gst_query_parse_duration (query, NULL, &duration); |
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|
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g_print (" duration: %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (duration)); |
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} |
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gst_query_unref (query); |
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|
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gst_object_unref (pad); |
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} |
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gst_iterator_free (it); |
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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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99 |
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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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g_signal_connect (G_OBJECT (decodebin), "new-decoded-pad", |
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111 |
G_CALLBACK (new_pad), NULL); |
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112 |
g_signal_connect (G_OBJECT (decodebin), "no-more-pads", |
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113 |
G_CALLBACK (no_more_pads), NULL); |
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114 |
|
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115 |
gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL); |
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116 |
gst_element_link (filesrc, decodebin); |
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117 |
|
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118 |
if (argc < 2) { |
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g_print ("usage: %s <uri>\n", argv[0]); |
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120 |
exit (-1); |
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121 |
} |
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122 |
g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL); |
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123 |
|
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124 |
/* event based programming approach */ |
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loop = g_main_loop_new (NULL, TRUE); |
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126 |
g_idle_add ((GSourceFunc) start_finding, pipeline); |
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g_main_loop_run (loop); |
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128 |
|
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129 |
dump_element_stats (decodebin); |
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130 |
|
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131 |
return 0; |
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132 |
} |