gstreamer/tests/mp1vid.c

#include <gst/gst.h>

GstElement *audiothread;
GstElement *audioqueue;
GstElement *audiodecode;
GstElement *audiosink;

void new_pad(GstElement *parse,GstPad *pad,GstElement *pipeline) {

  if (!strncmp(gst_pad_get_name(pad), "audio_", 6)) {
    fprintf(stderr,"have audio pad\n");

    fprintf(stderr,"creating thread\n");
    audiothread = gst_elementfactory_make("thread","audiothread");
    gst_bin_add(GST_BIN(pipeline),audiothread);

    fprintf(stderr,"creating queue\n");
    audioqueue = gst_elementfactory_make("queue","audioqueue");
    gst_bin_add(GST_BIN(audiothread),audioqueue);
    gst_pad_connect(pad,gst_element_get_pad(audioqueue,"sink"));

    fprintf(stderr,"creating decoder\n");
    audiodecode = gst_elementfactory_make("mad","audiodecode");
    gst_bin_add(GST_BIN(audiothread),audiodecode);
    gst_element_connect(audioqueue,"src",audiodecode,"sink");

    fprintf(stderr,"creating esdsink\n");
    audiosink = gst_elementfactory_make("osssink","audiosink");
    gst_bin_add(GST_BIN(audiothread),audiosink);
    gst_element_connect(audiodecode,"src",audiosink,"sink");

    fprintf(stderr,"setting state to PLAYING\n");
    gst_element_set_state(audiothread,GST_STATE_PLAYING);

    fprintf(stderr,"done dealing with new audio pad\n");
  }
}

int main(int argc,char *argv[]) {
  GstElement *pipeline, *sourcethread, *src, *parse;
  int i;

  gst_init(&argc,&argv);

  pipeline = gst_pipeline_new("pipeline");
  sourcethread = gst_elementfactory_make("thread","sourcethread");
  src = gst_elementfactory_make("disksrc","src");
  gtk_object_set(GTK_OBJECT(src),"location","/opt/data/AlienSong.mpg",NULL);
  parse = gst_elementfactory_make("mpeg1parse","parse");

  gtk_signal_connect(GTK_OBJECT(parse),"new_pad",
                      GTK_SIGNAL_FUNC(new_pad),pipeline);

  gst_bin_add(GST_BIN(sourcethread),src);
  gst_bin_add(GST_BIN(sourcethread),parse);

  gst_element_connect(src,"src",parse,"sink");

  gst_bin_add(GST_BIN(pipeline),sourcethread);

  gst_schedule_show(GST_ELEMENT_SCHED(pipeline));

  gst_element_set_state(pipeline,GST_STATE_PLAYING);
  sleep(1);

  while (1) {
//    sleep(1);
    gst_element_set_state(pipeline,GST_STATE_PAUSED);fprintf(stderr,"paused... ");
//    sleep(1);
    gst_element_set_state(pipeline,GST_STATE_PLAYING);fprintf(stderr,"playing.\n");
  }

//  for (i=0;i<10;i++)
//  while (1)
//    gst_bin_iterate(GST_BIN(pipeline));
}