gstreamer/gst/playback/test.c
Wim Taymans ac162b0f78 gst/playback/test.c: Example of a small audio/video player using decodebin.
Original commit message from CVS:
* gst/playback/test.c: (gen_video_element), (gen_audio_element),
(cb_newpad), (main):
Example of a small audio/video player using decodebin.
2006-07-20 10:42:21 +00:00

191 lines
5 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2006> Wim Taymans <wim@fluendo.com>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
static GMainLoop *loop;
static GstElement *
gen_video_element ()
{
GstElement *element;
GstElement *conv;
GstElement *sink;
GstPad *pad;
element = gst_bin_new ("vbin");
conv = gst_element_factory_make ("ffmpegcolorspace", "conv");
sink = gst_element_factory_make (DEFAULT_VIDEOSINK, "sink");
gst_bin_add (GST_BIN (element), conv);
gst_bin_add (GST_BIN (element), sink);
gst_element_link_pads (conv, "src", sink, "sink");
pad = gst_element_get_pad (conv, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
return element;
}
static GstElement *
gen_audio_element ()
{
GstElement *element;
GstElement *conv;
GstElement *sink;
GstPad *pad;
element = gst_bin_new ("abin");
conv = gst_element_factory_make ("audioconvert", "conv");
sink = gst_element_factory_make (DEFAULT_AUDIOSINK, "sink");
gst_bin_add (GST_BIN (element), conv);
gst_bin_add (GST_BIN (element), sink);
gst_element_link_pads (conv, "src", sink, "sink");
pad = gst_element_get_pad (conv, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
return element;
}
static void
cb_newpad (GstElement * decodebin, GstPad * pad, gboolean last, gpointer data)
{
GstCaps *caps;
GstStructure *str;
GstPad *sinkpad;
GstElement *sink;
GstElement *pipeline;
const gchar *name;
GstStateChangeReturn ret;
GstPadLinkReturn lret;
/* check media type */
caps = gst_pad_get_caps (pad);
str = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (str);
g_print ("name: %s\n", name);
if (g_strrstr (name, "audio")) {
sink = gen_audio_element ();
} else if (g_strrstr (name, "video")) {
sink = gen_video_element ();
} else {
sink = NULL;
}
gst_caps_unref (caps);
if (sink) {
pipeline = GST_ELEMENT_CAST (data);
/* add new sink to the pipeline */
gst_bin_add (GST_BIN_CAST (pipeline), sink);
/* set the new sink tp PAUSED as well */
ret = gst_element_set_state (sink, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto state_error;
/* get the ghostpad of the sink bin */
sinkpad = gst_element_get_pad (sink, "sink");
/* link'n'play */
lret = gst_pad_link (pad, sinkpad);
if (lret != GST_PAD_LINK_OK)
goto link_failed;
gst_object_unref (sinkpad);
}
return;
/* ERRORS */
state_error:
{
gst_bin_remove (GST_BIN_CAST (pipeline), sink);
g_warning ("could not change state of new sink (%d)", ret);
return;
}
link_failed:
{
g_warning ("could not link pad and sink (%d)", lret);
return;
}
}
gint
main (gint argc, gchar * argv[])
{
GstElement *pipeline, *filesrc, *decodebin;
GstStateChangeReturn res;
gst_init (&argc, &argv);
pipeline = gst_pipeline_new ("pipeline");
filesrc = gst_element_factory_make ("filesrc", "filesrc");
g_assert (filesrc);
decodebin = gst_element_factory_make ("decodebin", "decodebin");
g_assert (decodebin);
g_signal_connect (G_OBJECT (decodebin), "new-decoded-pad",
G_CALLBACK (cb_newpad), pipeline);
gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);
gst_element_link (filesrc, decodebin);
if (argc < 2) {
g_print ("usage: %s <uri>\n", argv[0]);
exit (-1);
}
g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
/* set to paused, decodebin will autoplug and signal new_pad callbacks */
res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
if (res == GST_STATE_CHANGE_FAILURE) {
g_print ("could not pause\n");
return -1;
}
/* wait for paused to complete */
res = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
if (res == GST_STATE_CHANGE_FAILURE) {
g_print ("could not pause\n");
return -1;
}
/* play, now all the sinks are added to the pipeline and are prerolled and
* ready to play. */
res = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (res == GST_STATE_CHANGE_FAILURE) {
g_print ("could not play\n");
return -1;
}
/* go in the mainloop now */
loop = g_main_loop_new (NULL, TRUE);
g_main_loop_run (loop);
return 0;
}