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ca7a964fb1
Instead of the deprecated gst_element_get_request_pad.
173 lines
4.8 KiB
C
173 lines
4.8 KiB
C
#include <gst/gst.h>
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#define SWITCH_TIMEOUT 1
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#define NUM_VIDEO_BUFFERS 500
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static GMainLoop *loop;
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/* Output selector src pads */
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static GstPad *osel_src1 = NULL;
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static GstPad *osel_src2 = NULL;
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static gboolean
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my_bus_callback (GstBus * bus, GstMessage * message, gpointer data)
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{
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g_print ("Got %s message\n", GST_MESSAGE_TYPE_NAME (message));
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:{
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GError *err;
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gchar *debug;
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gst_message_parse_error (message, &err, &debug);
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g_print ("Error: %s\n", err->message);
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g_error_free (err);
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g_free (debug);
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g_main_loop_quit (loop);
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break;
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}
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case GST_MESSAGE_EOS:
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/* end-of-stream */
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g_main_loop_quit (loop);
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break;
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default:
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/* unhandled message */
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break;
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}
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/* we want to be notified again the next time there is a message
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* on the bus, so returning TRUE (FALSE means we want to stop watching
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* for messages on the bus and our callback should not be called again)
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*/
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return TRUE;
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}
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static gboolean
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switch_cb (gpointer user_data)
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{
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GstElement *sel = GST_ELEMENT (user_data);
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GstPad *old_pad, *new_pad = NULL;
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g_object_get (G_OBJECT (sel), "active-pad", &old_pad, NULL);
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if (old_pad == osel_src1)
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new_pad = osel_src2;
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else
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new_pad = osel_src1;
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g_object_set (G_OBJECT (sel), "active-pad", new_pad, NULL);
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g_print ("switched from %s:%s to %s:%s\n", GST_DEBUG_PAD_NAME (old_pad),
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GST_DEBUG_PAD_NAME (new_pad));
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gst_object_unref (old_pad);
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return TRUE;
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}
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static void
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on_bin_element_added (GstBin * bin, GstElement * element, gpointer user_data)
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{
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g_object_set (G_OBJECT (element), "sync", FALSE, "async", FALSE, NULL);
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}
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gint
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main (gint argc, gchar * argv[])
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{
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GstElement *pipeline, *src, *toverlay, *osel, *sink1, *sink2, *c1, *c2, *c0;
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GstPad *sinkpad;
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GstBus *bus;
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/* init GStreamer */
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gst_init (&argc, &argv);
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loop = g_main_loop_new (NULL, FALSE);
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/* create elements */
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pipeline = gst_element_factory_make ("pipeline", "pipeline");
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src = gst_element_factory_make ("videotestsrc", "src");
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c0 = gst_element_factory_make ("videoconvert", NULL);
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toverlay = gst_element_factory_make ("timeoverlay", "timeoverlay");
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osel = gst_element_factory_make ("output-selector", "osel");
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c1 = gst_element_factory_make ("videoconvert", NULL);
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c2 = gst_element_factory_make ("videoconvert", NULL);
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sink1 = gst_element_factory_make ("autovideosink", "sink1");
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sink2 = gst_element_factory_make ("autovideosink", "sink2");
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if (!pipeline || !src || !c0 || !toverlay || !osel || !c1 || !c2 || !sink1 ||
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!sink2) {
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g_print ("missing element\n");
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return -1;
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}
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/* add them to bin */
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gst_bin_add_many (GST_BIN (pipeline), src, c0, toverlay, osel, c1, sink1, c2,
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sink2, NULL);
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/* set properties */
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g_object_set (G_OBJECT (src), "is-live", TRUE, NULL);
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g_object_set (G_OBJECT (src), "do-timestamp", TRUE, NULL);
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g_object_set (G_OBJECT (src), "num-buffers", NUM_VIDEO_BUFFERS, NULL);
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g_object_set (G_OBJECT (osel), "resend-latest", TRUE, NULL);
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/* handle deferred properties */
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g_signal_connect (G_OBJECT (sink1), "element-added",
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G_CALLBACK (on_bin_element_added), NULL);
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g_signal_connect (G_OBJECT (sink2), "element-added",
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G_CALLBACK (on_bin_element_added), NULL);
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/* link src ! timeoverlay ! osel */
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if (!gst_element_link_many (src, c0, toverlay, osel, NULL)) {
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g_print ("linking failed\n");
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return -1;
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}
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/* link output 1 */
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sinkpad = gst_element_get_static_pad (c1, "sink");
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osel_src1 = gst_element_request_pad_simple (osel, "src_%u");
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if (gst_pad_link (osel_src1, sinkpad) != GST_PAD_LINK_OK) {
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g_print ("linking output 1 converter failed\n");
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return -1;
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}
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gst_object_unref (sinkpad);
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if (!gst_element_link (c1, sink1)) {
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g_print ("linking output 1 failed\n");
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return -1;
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}
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/* link output 2 */
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sinkpad = gst_element_get_static_pad (c2, "sink");
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osel_src2 = gst_element_request_pad_simple (osel, "src_%u");
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if (gst_pad_link (osel_src2, sinkpad) != GST_PAD_LINK_OK) {
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g_print ("linking output 2 converter failed\n");
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return -1;
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}
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gst_object_unref (sinkpad);
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if (!gst_element_link (c2, sink2)) {
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g_print ("linking output 2 failed\n");
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return -1;
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}
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/* add switch callback */
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g_timeout_add_seconds (SWITCH_TIMEOUT, switch_cb, osel);
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/* change to playing */
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bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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gst_bus_add_watch (bus, my_bus_callback, loop);
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gst_object_unref (bus);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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/* now run */
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g_main_loop_run (loop);
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/* also clean up */
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_element_release_request_pad (osel, osel_src1);
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gst_element_release_request_pad (osel, osel_src2);
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gst_object_unref (GST_OBJECT (pipeline));
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return 0;
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}
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