mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-20 13:28:21 +00:00
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
#include <gst/gst.h>
|
|
|
|
int main(int argc, char *argv[]) {
|
|
GstElement *pipeline, *source, *sink;
|
|
GstBus *bus;
|
|
GstMessage *msg;
|
|
GstStateChangeReturn ret;
|
|
|
|
/* Initialize GStreamer */
|
|
gst_init (&argc, &argv);
|
|
|
|
/* Create the elements */
|
|
source = gst_element_factory_make ("videotestsrc", "source");
|
|
sink = gst_element_factory_make ("autovideosink", "sink");
|
|
|
|
/* Create the empty pipeline */
|
|
pipeline = gst_pipeline_new ("test-pipeline");
|
|
|
|
if (!pipeline || !source || !sink) {
|
|
g_printerr ("Not all elements could be created.\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Build the pipeline */
|
|
gst_bin_add_many (GST_BIN (pipeline), source, sink, NULL);
|
|
if (gst_element_link (source, sink) != TRUE) {
|
|
g_printerr ("Elements could not be linked.\n");
|
|
gst_object_unref (pipeline);
|
|
return -1;
|
|
}
|
|
|
|
/* Modify the source's properties */
|
|
g_object_set (source, "pattern", 0, NULL);
|
|
|
|
/* Start playing */
|
|
ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
|
|
if (ret == GST_STATE_CHANGE_FAILURE) {
|
|
g_printerr ("Unable to set the pipeline to the playing state.\n");
|
|
gst_object_unref (pipeline);
|
|
return -1;
|
|
}
|
|
|
|
/* Wait until error or EOS */
|
|
bus = gst_element_get_bus (pipeline);
|
|
msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
|
|
|
|
/* Parse message */
|
|
if (msg != NULL) {
|
|
GError *err;
|
|
gchar *debug_info;
|
|
|
|
switch (GST_MESSAGE_TYPE (msg)) {
|
|
case GST_MESSAGE_ERROR:
|
|
gst_message_parse_error (msg, &err, &debug_info);
|
|
g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
|
|
g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
|
|
g_clear_error (&err);
|
|
g_free (debug_info);
|
|
break;
|
|
case GST_MESSAGE_EOS:
|
|
g_print ("End-Of-Stream reached.\n");
|
|
break;
|
|
default:
|
|
/* We should not reach here because we only asked for ERRORs and EOS */
|
|
g_printerr ("Unexpected message received.\n");
|
|
break;
|
|
}
|
|
gst_message_unref (msg);
|
|
}
|
|
|
|
/* Free resources */
|
|
gst_object_unref (bus);
|
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
gst_object_unref (pipeline);
|
|
return 0;
|
|
} |