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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
#include <stdlib.h>
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#include <gst/gst.h>
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/* returns all factories which have a maximum of maxtemplates GstPadTemplates in direction dir
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*/
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GList *
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gst_factories_at_most_templates(GList *factories, GstPadDirection dir, guint maxtemplates)
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{
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GList *ret = NULL;
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while (factories)
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{
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guint count = 0;
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GList *templs = ((GstElementFactory *) factories->data)->padtemplates;
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while (templs)
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{
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if (GST_PADTEMPLATE_DIRECTION (templs->data) == dir)
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{
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count++;
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}
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if (count > maxtemplates)
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break;
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templs = g_list_next (templs);
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}
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if (count <= maxtemplates)
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ret = g_list_prepend (ret, factories->data);
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factories = g_list_next (factories);
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}
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return ret;
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}
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static void
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property_change_callback (GObject *object, GstObject *orig, GParamSpec *pspec)
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{
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GValue value = { 0, }; /* the important thing is that value.type = 0 */
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gchar *str = 0;
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if (pspec->flags & G_PARAM_READABLE) {
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g_value_init(&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
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g_object_get_property (G_OBJECT (orig), pspec->name, &value);
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if (G_IS_PARAM_SPEC_STRING (pspec))
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str = g_value_dup_string (&value);
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else if (G_IS_PARAM_SPEC_ENUM (pspec))
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str = g_strdup_printf ("%d", g_value_get_enum (&value));
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else if (G_IS_PARAM_SPEC_INT64 (pspec))
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str = g_strdup_printf ("%lld", g_value_get_int64 (&value));
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else
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str = g_strdup_value_contents (&value);
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g_print ("%s: %s = %s\n", GST_OBJECT_NAME (orig), pspec->name, str);
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g_free (str);
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g_value_unset(&value);
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} else {
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g_warning ("Parameter not readable. What's up with that?");
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}
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}
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static void
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error_callback (GObject *object, GstObject *orig, gchar *error)
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{
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g_print ("ERROR: %s: %s\n", GST_OBJECT_NAME (orig), error);
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}
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/**
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* Test program for the autoplugger.
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* Uses new API extensions (2002-01-28), too.
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*
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* USAGE: spidertest <mediafile>
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* If mediafile can be recognized, xvideo and oss audio output are tried.
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*/
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int main(int argc,char *argv[])
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{
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GstElement *bin, *filesrc, *decoder, *osssink, *videosink;
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GList *facs;
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if (argc < 2) {
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g_print("usage: %s <file>\n", argv[0]);
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exit(-1);
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}
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gst_init(&argc,&argv);
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/* create a new bin to hold the elements */
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bin = gst_pipeline_new("pipeline");
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g_signal_connect (bin, "deep_notify", G_CALLBACK (property_change_callback), NULL);
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g_signal_connect (bin, "error", G_CALLBACK (error_callback), NULL);
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/* create a disk reader */
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filesrc = gst_elementfactory_make("filesrc", "disk_source");
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g_object_set(G_OBJECT(filesrc),"location", argv[1], NULL);
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/* now it's time to get the decoder */
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decoder = gst_elementfactory_make("spider", "spider");
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if (!decoder) {
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g_print ("could not find plugin \"spider\"\n");
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exit (-2);
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}
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/* only use decoding plugins */
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g_object_get (decoder, "factories", &facs, NULL);
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facs = gst_factories_at_most_templates(facs, GST_PAD_SINK, 1);
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g_object_set (decoder, "factories", facs, NULL);
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/* create video and audio sink */
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osssink = gst_elementfactory_make("osssink", "audio");
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videosink = gst_elementfactory_make("xvideosink", "video");
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if ((!osssink) || (!videosink)) {
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g_print ("could not create output plugins\n");
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exit (-3);
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}
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/* add objects to the main pipeline */
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gst_bin_add(GST_BIN(bin), filesrc);
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gst_bin_add(GST_BIN(bin), decoder);
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gst_bin_add(GST_BIN(bin), osssink);
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gst_bin_add(GST_BIN(bin), videosink);
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/* connect objects */
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if (!(gst_element_connect_elements(filesrc, decoder) &&
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gst_element_connect_elements(decoder, osssink) &&
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gst_element_connect_elements(decoder, videosink)))
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{
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g_print ("the pipeline could not be connected\n");
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exit (-4);
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}
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gst_bin_use_clock (GST_BIN (bin), gst_system_clock_obtain ());
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/* start playing */
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gst_element_set_state(bin, GST_STATE_PLAYING);
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while (gst_bin_iterate(GST_BIN(bin)));
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exit(0);
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}
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