mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-26 03:31:05 +00:00
978c380731
Original commit message from CVS: Fixed the helloworld example by using a pipeline as the toplevel element.
89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
#include <stdlib.h>
|
|
#include <gst/gst.h>
|
|
|
|
gboolean playing;
|
|
|
|
/* eos will be called when the src element has an end of stream */
|
|
void eos(GstElement *element)
|
|
{
|
|
g_print("have eos, quitting\n");
|
|
|
|
playing = FALSE;
|
|
}
|
|
|
|
int main(int argc,char *argv[])
|
|
{
|
|
GstElement *bin, *disksrc, *parse, *decoder, *downmix, *mulaw, *mulawdec, *osssink;
|
|
|
|
gst_init(&argc,&argv);
|
|
|
|
if (argc != 2) {
|
|
g_print("usage: %s <filename>\n", argv[0]);
|
|
exit(-1);
|
|
}
|
|
|
|
/* create a new bin to hold the elements */
|
|
bin = gst_pipeline_new("pipeline");
|
|
|
|
/* create a disk reader */
|
|
disksrc = gst_elementfactory_make("disksrc", "disk_source");
|
|
gtk_object_set(GTK_OBJECT(disksrc),"location", argv[1],NULL);
|
|
gtk_signal_connect(GTK_OBJECT(disksrc),"eos",
|
|
GTK_SIGNAL_FUNC(eos),NULL);
|
|
|
|
/* now it's time to get the parser */
|
|
parse = gst_elementfactory_make("mp3parse","parse");
|
|
decoder = gst_elementfactory_make("mpg123","decoder");
|
|
downmix = gst_elementfactory_make("stereo2mono","stereo2mono");
|
|
mulaw = gst_elementfactory_make("mulawencode","mulaw");
|
|
mulawdec = gst_elementfactory_make("mulawdecode","mulawdec");
|
|
/* and an audio sink */
|
|
osssink = gst_elementfactory_make("osssink", "play_audio");
|
|
|
|
/* add objects to the main pipeline */
|
|
gst_bin_add(GST_BIN(bin), disksrc);
|
|
gst_bin_add(GST_BIN(bin), parse);
|
|
gst_bin_add(GST_BIN(bin), decoder);
|
|
gst_bin_add(GST_BIN(bin), downmix);
|
|
gst_bin_add(GST_BIN(bin), mulaw);
|
|
gst_bin_add(GST_BIN(bin), mulawdec);
|
|
gst_bin_add(GST_BIN(bin), osssink);
|
|
|
|
/* connect src to sink */
|
|
gst_pad_connect(gst_element_get_pad(disksrc,"src"),
|
|
gst_element_get_pad(parse,"sink"));
|
|
gst_pad_connect(gst_element_get_pad(parse,"src"),
|
|
gst_element_get_pad(decoder,"sink"));
|
|
gst_pad_connect(gst_element_get_pad(decoder,"src"),
|
|
gst_element_get_pad(downmix,"sink"));
|
|
gst_pad_connect(gst_element_get_pad(downmix,"src"),
|
|
gst_element_get_pad(mulaw,"sink"));
|
|
gst_pad_connect(gst_element_get_pad(mulaw,"src"),
|
|
gst_element_get_pad(mulawdec,"sink"));
|
|
gst_pad_connect(gst_element_get_pad(mulawdec,"src"),
|
|
gst_element_get_pad(osssink,"sink"));
|
|
|
|
/* start playing */
|
|
gst_element_set_state(bin, GST_STATE_PLAYING);
|
|
|
|
playing = TRUE;
|
|
|
|
while (playing) {
|
|
gst_bin_iterate(GST_BIN(bin));
|
|
}
|
|
|
|
/* stop the bin */
|
|
gst_element_set_state(bin, GST_STATE_NULL);
|
|
|
|
gst_object_destroy(GST_OBJECT(osssink));
|
|
gst_object_destroy(GST_OBJECT(parse));
|
|
gst_object_destroy(GST_OBJECT(decoder));
|
|
gst_object_destroy(GST_OBJECT(downmix));
|
|
gst_object_destroy(GST_OBJECT(mulaw));
|
|
gst_object_destroy(GST_OBJECT(mulawdec));
|
|
gst_object_destroy(GST_OBJECT(disksrc));
|
|
gst_object_destroy(GST_OBJECT(bin));
|
|
|
|
exit(0);
|
|
}
|
|
|