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133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
#include <gst/gst.h>
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static void
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gst_play_have_type (GstElement * typefind, GstCaps * caps,
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GstElement * pipeline)
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{
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GstElement *osssink;
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GstElement *new_element;
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GstAutoplug *autoplug;
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GstElement *autobin;
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GstElement *filesrc;
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GstElement *cache;
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GST_DEBUG ("GstPipeline: play have type");
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gst_element_set_state (pipeline, GST_STATE_PAUSED);
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filesrc = gst_bin_get_by_name (GST_BIN (pipeline), "disk_source");
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autobin = gst_bin_get_by_name (GST_BIN (pipeline), "autobin");
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cache = gst_bin_get_by_name (GST_BIN (autobin), "cache");
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/* unlink_pads the typefind from the pipeline and remove it */
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gst_element_unlink_pads (cache, "src", typefind, "sink");
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gst_bin_remove (GST_BIN (autobin), typefind);
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/* and an audio sink */
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osssink = gst_element_factory_make ("osssink", "play_audio");
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g_assert (osssink != NULL);
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autoplug = gst_autoplug_factory_make ("staticrender");
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g_assert (autoplug != NULL);
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new_element = gst_autoplug_to_renderers (autoplug, caps, osssink, NULL);
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if (!new_element) {
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g_print ("could not autoplug, no suitable codecs found...\n");
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exit (-1);
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}
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gst_element_set_name (new_element, "new_element");
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gst_bin_add (GST_BIN (autobin), new_element);
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g_object_set (G_OBJECT (cache), "reset", TRUE, NULL);
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gst_element_link_pads (cache, "src", new_element, "sink");
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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}
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static void
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gst_play_cache_empty (GstElement * element, GstElement * pipeline)
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{
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GstElement *autobin;
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GstElement *filesrc;
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GstElement *cache;
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GstElement *new_element;
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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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filesrc = gst_bin_get_by_name (GST_BIN (pipeline), "disk_source");
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autobin = gst_bin_get_by_name (GST_BIN (pipeline), "autobin");
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cache = gst_bin_get_by_name (GST_BIN (autobin), "cache");
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new_element = gst_bin_get_by_name (GST_BIN (autobin), "new_element");
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gst_element_unlink_pads (filesrc, "src", cache, "sink");
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gst_element_unlink_pads (cache, "src", new_element, "sink");
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gst_bin_remove (GST_BIN (autobin), cache);
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gst_element_link_pads (filesrc, "src", new_element, "sink");
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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fprintf (stderr, "done with cache_empty\n");
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}
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int
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main (int argc, char *argv[])
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{
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GstElement *filesrc;
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GstElement *pipeline;
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GstElement *autobin;
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GstElement *typefind;
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GstElement *cache;
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gst_init (&argc, &argv);
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if (argc != 2) {
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g_print ("usage: %s <filename>\n", argv[0]);
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exit (-1);
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}
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/* create a new pipeline to hold the elements */
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pipeline = gst_pipeline_new ("pipeline");
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g_assert (pipeline != NULL);
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/* create a disk reader */
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filesrc = gst_element_factory_make ("filesrc", "disk_source");
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g_assert (filesrc != NULL);
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g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
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gst_bin_add (GST_BIN (pipeline), filesrc);
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autobin = gst_bin_new ("autobin");
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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 (gst_play_cache_empty), pipeline);
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typefind = gst_element_factory_make ("typefind", "typefind");
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g_signal_connect (G_OBJECT (typefind), "have_type",
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G_CALLBACK (gst_play_have_type), pipeline);
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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_link_pads (cache, "src", typefind, "sink");
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gst_element_add_ghost_pad (autobin, gst_element_get_pad (cache, "sink"),
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"sink");
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gst_bin_add (GST_BIN (pipeline), autobin);
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gst_element_link_pads (filesrc, "src", autobin, "sink");
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/* start playing */
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gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
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while (gst_bin_iterate (GST_BIN (pipeline)));
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/* stop the pipeline */
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gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
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gst_object_unref (GST_OBJECT (pipeline));
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exit (0);
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}
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