gstreamer/gst/autoplug/autoplugtest.c

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#include <gst/gst.h>
#include <string.h>
GstElement *pipeline, *src, *autobin, *cache, *typefind, *decoder, *sink;
void cache_empty(GstElement *element, gpointer private) {
fprintf(stderr,"have cache empty\n");
gst_element_set_state (pipeline, GST_STATE_PAUSED);
gst_element_disconnect(src,"src",cache,"sink");
gst_schedule_show (GST_ELEMENT_SCHED(pipeline));
gst_element_disconnect(cache,"src",decoder,"sink");
gst_schedule_show (GST_ELEMENT_SCHED(pipeline));
gst_bin_remove (GST_BIN(autobin), cache);
gst_schedule_show (GST_ELEMENT_SCHED(pipeline));
gst_element_connect(src,"src",decoder,"sink");
gst_schedule_show (GST_ELEMENT_SCHED(pipeline));
gst_element_set_state (pipeline, GST_STATE_PLAYING);
gst_schedule_show (GST_ELEMENT_SCHED(pipeline));
fprintf(stderr,"done with cache_empty\n");
}
void have_type(GstElement *element, GstCaps *caps, GstCaps **private_caps) {
fprintf(stderr,"have caps, mime type is %s\n",gst_caps_get_mime(caps));
gst_element_set_state (pipeline, GST_STATE_PAUSED);
// disconnect the typefind from the pipeline and remove it
gst_element_disconnect(cache,"src",typefind,"sink");
gst_bin_remove(GST_BIN(autobin),typefind);
gst_schedule_show (GST_ELEMENT_SCHED(pipeline));
if (strstr(gst_caps_get_mime(caps),"mp3")) {
decoder = gst_elementfactory_make ("mad","decoder");
sink = gst_elementfactory_make ("osssink","sink");
gst_bin_add(GST_BIN(autobin),decoder);
gst_bin_add(GST_BIN(autobin),sink);
gst_element_connect(decoder,"src",sink,"sink");
g_object_set (G_OBJECT(cache), "reset", TRUE, NULL);
gst_element_connect(cache,"src",decoder,"sink");
}
else if (strstr(gst_caps_get_mime(caps),"x-ogg")) {
decoder = gst_elementfactory_make ("vorbisdec","decoder");
sink = gst_elementfactory_make ("osssink","sink");
gst_bin_add(GST_BIN(autobin),decoder);
gst_bin_add(GST_BIN(autobin),sink);
gst_element_connect(decoder,"src",sink,"sink");
g_object_set (G_OBJECT(cache), "reset", TRUE, NULL);
gst_element_connect(cache,"src",decoder,"sink");
}
gst_element_set_state (pipeline, GST_STATE_PLAYING);
fprintf(stderr,"done with have_type signal\n");
}
int main (int argc,char *argv[]) {
GstCaps *caps;
gst_init(&argc,&argv);
pipeline = gst_pipeline_new("pipeline");
src = gst_elementfactory_make ("disksrc","src");
g_object_set(G_OBJECT(src),"location",argv[1],NULL);
gst_bin_add (GST_BIN(pipeline),src);
autobin = gst_bin_new("autobin");
cache = gst_elementfactory_make ("autoplugcache","cache");
g_signal_connectc (G_OBJECT(cache),"cache_empty",(GCallback)cache_empty,NULL,FALSE);
typefind = gst_elementfactory_make ("typefind", "typefind");
g_signal_connectc (G_OBJECT(typefind),"have_type",(GCallback)have_type,&caps,FALSE);
gst_bin_add (GST_BIN(autobin),cache);
gst_bin_add (GST_BIN(autobin),typefind);
gst_element_connect(cache,"src",typefind,"sink");
gst_element_add_ghost_pad(autobin,gst_element_get_pad(cache,"sink"),"sink");
gst_bin_add (GST_BIN(pipeline), autobin);
gst_element_connect (src,"src",autobin,"sink");
gst_element_set_state(pipeline,GST_STATE_PLAYING);
while (1)
gst_bin_iterate(GST_BIN(pipeline));
}