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122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
#include <gst/gst.h>
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#include <string.h>
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GstElement *pipeline, *src, *autobin, *cache, *typefind, *decoder, *sink;
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/* callback for when we have the type of the file
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* we set up a playing pipeline based on the mime type
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*/
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void
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have_type (GstElement *element, GstCaps *caps, GstCaps **private_caps)
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{
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gchar *mime = g_strdup_printf (gst_caps_get_mime (caps));
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fprintf (stderr, "have caps, mime type is %s\n", mime);
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gst_element_set_state (pipeline, GST_STATE_PAUSED);
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/* disconnect the typefind from the pipeline and remove it,
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* since we now know what the type is */
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gst_element_disconnect (cache, typefind);
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gst_bin_remove (GST_BIN (autobin), typefind);
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gst_scheduler_show (GST_ELEMENT_SCHED (pipeline));
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/* now based on the mime type set up the pipeline properly */
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if (strstr (mime, "mp3")) {
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decoder = gst_element_factory_make ("mad", "decoder");
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}
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else if (strstr (mime, "x-ogg")) {
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decoder = gst_element_factory_make ("vorbisfile", "decoder");
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}
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else if (strstr (mime, "x-wav")) {
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decoder = gst_element_factory_make ("wavparse", "decoder");
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}
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else if (strstr (mime, "x-flac")) {
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decoder = gst_element_factory_make ("flacdec", "decoder");
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}
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else {
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g_print ("mime type %s not handled in this program, exiting.\n", mime);
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g_free (mime);
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exit (-1);
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}
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g_free (mime);
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/* handle playback */
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sink = gst_element_factory_make ("osssink", "sink");
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gst_bin_add (GST_BIN (autobin), decoder);
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gst_bin_add (GST_BIN (autobin), sink);
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gst_element_connect (decoder, sink);
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g_object_set (G_OBJECT (cache), "reset", TRUE, NULL);
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gst_element_connect (cache, decoder);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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fprintf (stderr, "done with have_type signal, playing\n");
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}
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void cache_empty (GstElement *element, gpointer private) {
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fprintf(stderr,"have cache empty\n");
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gst_element_set_state (pipeline, GST_STATE_PAUSED);
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gst_element_disconnect_pads (src,"src",cache,"sink");
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gst_scheduler_show (GST_ELEMENT_SCHED(pipeline));
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gst_element_disconnect_pads (cache,"src",decoder,"sink");
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gst_scheduler_show (GST_ELEMENT_SCHED(pipeline));
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gst_bin_remove (GST_BIN(autobin), cache);
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gst_scheduler_show (GST_ELEMENT_SCHED(pipeline));
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gst_element_connect_pads (src,"src",decoder,"sink");
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gst_scheduler_show (GST_ELEMENT_SCHED(pipeline));
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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gst_scheduler_show (GST_ELEMENT_SCHED(pipeline));
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fprintf(stderr,"done with cache_empty\n");
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}
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int main (int argc,char *argv[]) {
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GstCaps *caps;
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gst_init (&argc, &argv);
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pipeline = gst_pipeline_new ("pipeline");
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src = gst_element_factory_make ("filesrc","src");
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if (argc < 2) {
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g_print ("Please give a file to test the autoplugger on.\n");
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return -1;
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}
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g_object_set (G_OBJECT (src), "location", argv[1], NULL);
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gst_bin_add (GST_BIN (pipeline), src);
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/* the autobin will be used to do the autoplugging in */
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autobin = gst_bin_new ("autobin");
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/* a cache is used to make autoplugging quicker */
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cache = gst_element_factory_make ("autoplugcache", "cache");
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g_signal_connect (G_OBJECT (cache), "cache_empty",
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G_CALLBACK (cache_empty), NULL);
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/* typefind does the type detection */
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typefind = gst_element_factory_make ("typefind", "typefind");
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/* execute the callback when we find the type */
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g_signal_connect (G_OBJECT (typefind), "have_type",
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G_CALLBACK (have_type), &caps);
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gst_bin_add (GST_BIN (autobin), cache);
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gst_bin_add (GST_BIN (autobin), typefind);
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gst_element_connect (cache, typefind);
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gst_element_add_ghost_pad (autobin,
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gst_element_get_pad (cache, "sink") ,"sink");
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gst_bin_add (GST_BIN (pipeline), autobin);
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gst_element_connect (src, autobin);
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/* pipeline is now src ! autobin
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* with autobin: cache ! typefind
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*/
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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while (gst_bin_iterate (GST_BIN (pipeline)));
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return 0;
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}
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