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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
#include <gst/gst.h>
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/* playbin2 flags */
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typedef enum
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{
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GST_PLAY_FLAG_VIS = (1 << 3) /* Enable rendering of visualizations when there is no video stream. */
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} GstPlayFlags;
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/* Return TRUE if this is a Visualization element */
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static gboolean
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filter_vis_features (GstPluginFeature * feature, gpointer data)
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{
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GstElementFactory *factory;
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if (!GST_IS_ELEMENT_FACTORY (feature))
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return FALSE;
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factory = GST_ELEMENT_FACTORY (feature);
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if (!g_strrstr (gst_element_factory_get_klass (factory), "Visualization"))
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return FALSE;
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return TRUE;
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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 *pipeline, *vis_plugin;
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GstBus *bus;
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GstMessage *msg;
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GList *list, *walk;
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GstElementFactory *selected_factory = NULL;
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guint flags;
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/* Initialize GStreamer */
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gst_init (&argc, &argv);
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/* Get a list of all visualization plugins */
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list =
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gst_registry_feature_filter (gst_registry_get (), filter_vis_features,
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FALSE, NULL);
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/* Print their names */
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g_print ("Available visualization plugins:\n");
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for (walk = list; walk != NULL; walk = g_list_next (walk)) {
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const gchar *name;
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GstElementFactory *factory;
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factory = GST_ELEMENT_FACTORY (walk->data);
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name = gst_element_factory_get_longname (factory);
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g_print (" %s\n", name);
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if (selected_factory == NULL || g_str_has_prefix (name, "GOOM")) {
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selected_factory = factory;
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}
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}
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/* Don't use the factory if it's still empty */
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/* e.g. no visualization plugins found */
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if (!selected_factory) {
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g_print ("No visualization plugins found!\n");
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return -1;
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}
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/* We have now selected a factory for the visualization element */
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g_print ("Selected '%s'\n",
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gst_element_factory_get_longname (selected_factory));
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vis_plugin = gst_element_factory_create (selected_factory, NULL);
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if (!vis_plugin)
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return -1;
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/* Build the pipeline */
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pipeline =
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gst_parse_launch ("playbin uri=http://radio.hbr1.com:19800/ambient.ogg",
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NULL);
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/* Set the visualization flag */
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g_object_get (pipeline, "flags", &flags, NULL);
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flags |= GST_PLAY_FLAG_VIS;
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g_object_set (pipeline, "flags", flags, NULL);
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/* set vis plugin for playbin2 */
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g_object_set (pipeline, "vis-plugin", vis_plugin, NULL);
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/* Start playing */
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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/* Wait until error or EOS */
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bus = gst_element_get_bus (pipeline);
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msg =
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gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE,
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GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
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/* Free resources */
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if (msg != NULL)
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gst_message_unref (msg);
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gst_plugin_feature_list_free (list);
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gst_object_unref (bus);
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return 0;
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}
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