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Add audioconvert and audioscale elements and add an error handler

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Original commit message from CVS:
Add audioconvert and audioscale elements and add an error handler
This commit is contained in:
Tim-Philipp Müller 2005-04-05 16:51:53 +00:00
parent 52f501457d
commit f4b49b70e1
3 changed files with 78 additions and 8 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2005-04-05 Tim-Philipp Müller <tim at centricular dot net>
* examples/helloworld/helloworld.c: (error_cb), (main):
Add audioconvert and audioscale elements and an
error handler.
2005-03-30 Ronald S. Bultje <rbultje@ronald.bitfreak.net> 2005-03-30 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* gst/gstelement.c: (gst_element_found_tags_for_pad): * gst/gstelement.c: (gst_element_found_tags_for_pad):

40
examples/helloworld/helloworld.c
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@ -1,10 +1,22 @@
#include <stdlib.h> #include <stdlib.h>
#include <gst/gst.h> #include <gst/gst.h>
static void
error_cb (GstElement * bin, GstElement * error_element, GError * error,
const gchar * debug_msg, gpointer user_data)
{
gboolean *p_got_error = (gboolean *) user_data;
g_printerr ("An error occured: %s\n", error->message);
*p_got_error = TRUE;
}
int int
main (int argc, char *argv[]) main (int argc, char *argv[])
{ {
GstElement *bin, *filesrc, *decoder, *osssink; GstElement *bin, *filesrc, *decoder, *audioconvert, *audioscale, *osssink;
gboolean got_error;
gst_init (&argc, &argv); gst_init (&argc, &argv);
@ -28,23 +40,43 @@ main (int argc, char *argv[])
g_print ("could not find plugin \"mad\""); g_print ("could not find plugin \"mad\"");
return -1; return -1;
} }
/* create standard converters to make sure the decoded
* samples are converted into a format our audio sink
* understands (if necessary) */
audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
audioscale = gst_element_factory_make ("audioscale", "audioscale");
g_assert (audioconvert && audioscale);
/* and an audio sink */ /* and an audio sink */
osssink = gst_element_factory_make ("osssink", "play_audio"); osssink = gst_element_factory_make ("osssink", "play_audio");
g_assert (osssink); g_assert (osssink);
/* add objects to the main pipeline */ /* add objects to the main pipeline */
gst_bin_add_many (GST_BIN (bin), filesrc, decoder, osssink, NULL); gst_bin_add_many (GST_BIN (bin), filesrc, decoder, audioconvert, audioscale,
osssink, NULL);
/* link the elements */ /* link the elements */
gst_element_link_many (filesrc, decoder, osssink, NULL); if (!gst_element_link_many (filesrc, decoder, audioconvert, audioscale,
osssink, NULL))
g_error ("gst_element_link_many() failed!");
/* check for errors */
got_error = FALSE;
g_signal_connect (bin, "error", G_CALLBACK (error_cb), &got_error);
/* start playing */ /* start playing */
gst_element_set_state (bin, GST_STATE_PLAYING); gst_element_set_state (bin, GST_STATE_PLAYING);
while (gst_bin_iterate (GST_BIN (bin))); while (!got_error && gst_bin_iterate (GST_BIN (bin))) {
;
}
/* stop the bin */ /* stop the bin */
gst_element_set_state (bin, GST_STATE_NULL); gst_element_set_state (bin, GST_STATE_NULL);
/* free */
g_object_unref (bin);
exit (0); exit (0);
} }

40
tests/old/examples/helloworld/helloworld.c
View file

@ -1,10 +1,22 @@
#include <stdlib.h> #include <stdlib.h>
#include <gst/gst.h> #include <gst/gst.h>
static void
error_cb (GstElement * bin, GstElement * error_element, GError * error,
const gchar * debug_msg, gpointer user_data)
{
gboolean *p_got_error = (gboolean *) user_data;
g_printerr ("An error occured: %s\n", error->message);
*p_got_error = TRUE;
}
int int
main (int argc, char *argv[]) main (int argc, char *argv[])
{ {
GstElement *bin, *filesrc, *decoder, *osssink; GstElement *bin, *filesrc, *decoder, *audioconvert, *audioscale, *osssink;
gboolean got_error;
gst_init (&argc, &argv); gst_init (&argc, &argv);
@ -28,23 +40,43 @@ main (int argc, char *argv[])
g_print ("could not find plugin \"mad\""); g_print ("could not find plugin \"mad\"");
return -1; return -1;
} }
/* create standard converters to make sure the decoded
* samples are converted into a format our audio sink
* understands (if necessary) */
audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
audioscale = gst_element_factory_make ("audioscale", "audioscale");
g_assert (audioconvert && audioscale);
/* and an audio sink */ /* and an audio sink */
osssink = gst_element_factory_make ("osssink", "play_audio"); osssink = gst_element_factory_make ("osssink", "play_audio");
g_assert (osssink); g_assert (osssink);
/* add objects to the main pipeline */ /* add objects to the main pipeline */
gst_bin_add_many (GST_BIN (bin), filesrc, decoder, osssink, NULL); gst_bin_add_many (GST_BIN (bin), filesrc, decoder, audioconvert, audioscale,
osssink, NULL);
/* link the elements */ /* link the elements */
gst_element_link_many (filesrc, decoder, osssink, NULL); if (!gst_element_link_many (filesrc, decoder, audioconvert, audioscale,
osssink, NULL))
g_error ("gst_element_link_many() failed!");
/* check for errors */
got_error = FALSE;
g_signal_connect (bin, "error", G_CALLBACK (error_cb), &got_error);
/* start playing */ /* start playing */
gst_element_set_state (bin, GST_STATE_PLAYING); gst_element_set_state (bin, GST_STATE_PLAYING);
while (gst_bin_iterate (GST_BIN (bin))); while (!got_error && gst_bin_iterate (GST_BIN (bin))) {
;
}
/* stop the bin */ /* stop the bin */
gst_element_set_state (bin, GST_STATE_NULL); gst_element_set_state (bin, GST_STATE_NULL);
/* free */
g_object_unref (bin);
exit (0); exit (0);
} }