gstreamer/examples/queue/queue.c

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#include <stdlib.h>
#include <gst/gst.h>
int main(int argc,char *argv[])
{
GstElement *disksrc, *osssink, *parse, *decode, *queue;
GstElement *bin;
GstElement *thread;
gst_init(&argc,&argv);
if (argc != 2) {
g_print("usage: %s <filename>\n", argv[0]);
exit(-1);
}
/* create a new thread to hold the elements */
thread = gst_thread_new("thread");
g_assert(thread != NULL);
/* create a new bin to hold the elements */
bin = gst_bin_new("bin");
g_assert(bin != NULL);
/* create a disk reader */
disksrc = gst_elementfactory_make("disksrc", "disk_source");
g_assert(disksrc != NULL);
g_object_set(G_OBJECT(disksrc),"location", argv[1],NULL);
parse = gst_elementfactory_make("mp3parse", "parse");
decode = gst_elementfactory_make("mpg123", "decode");
queue = gst_elementfactory_make("queue", "queue");
/* and an audio sink */
osssink = gst_elementfactory_make("osssink", "play_audio");
g_assert(osssink != NULL);
/* 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), decode);
gst_bin_add(GST_BIN(bin), queue);
gst_bin_add(GST_BIN(thread), osssink);
gst_bin_add(GST_BIN(bin), thread);
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(decode,"sink"));
gst_pad_connect(gst_element_get_pad(decode,"src"),
gst_element_get_pad(queue,"sink"));
gst_pad_connect(gst_element_get_pad(queue,"src"),
gst_element_get_pad(osssink,"sink"));
/* start playing */
gst_element_set_state(GST_ELEMENT(bin), GST_STATE_PLAYING);
while (gst_bin_iterate(GST_BIN(bin)));
gst_element_set_state(GST_ELEMENT(bin), GST_STATE_NULL);
exit(0);
}