Example #1
0
func (e *Element) LinkPads(pad_name string, dst *Element, dst_pad_name string) bool {
	src_pname := (*C.gchar)(C.CString(pad_name))
	defer C.free(unsafe.Pointer(src_pname))
	dst_pname := (*C.gchar)(C.CString(dst_pad_name))
	defer C.free(unsafe.Pointer(dst_pname))
	return C.gst_element_link_pads(e.g(), src_pname, dst.g(), dst_pname) != 0
}
Example #2
0
File: play.go Project: reusee/oplay
func play2() {
	pipeline := C.gst_pipeline_new(toGStr("pipeline"))

	source, err := NewElement("filesrc", "source")
	if err != nil {
		log.Fatal(err)
	}
	ObjSet(asGObj(source), "location", os.Args[1])

	demux, err := NewElement("oggdemux", "demuxer")
	if err != nil {
		log.Fatal(err)
	}

	BinAdd(pipeline, source, demux)
	C.gst_element_link_pads(source, toGStr("src"), demux, toGStr("sink"))
	ObjConnect(asGObj(demux), "pad-added", func(demuxer *C.GstElement, pad *C.GstPad) {
		p("pad added %T %v\n", pad, pad)
	})

	// bus
	messages := PipelineWatchBus(asGstPipeline(pipeline))

	C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)

	loop := C.g_main_loop_new(nil, 0)
	go func() {
	loop:
		for msg := range messages {
			runtime.GC()
			p("=> %s: %s\n", fromGStr(C.gst_object_get_name(asGstObj(msg.src))),
				fromGStr(C.gst_message_type_get_name(msg._type)))
			switch msg._type {

			case C.GST_MESSAGE_ERROR:
				var err *C.GError
				var debug *C.gchar
				C.gst_message_parse_error(msg, &err, &debug)
				p("Error: %s\n%s\n", fromGStr(err.message), fromGStr(debug))
				C.g_error_free(err)
				C.g_free(asGPtr(debug))
				C.g_main_loop_quit(loop)
				break loop
			case C.GST_MESSAGE_WARNING:
			case C.GST_MESSAGE_INFO:

			case C.GST_MESSAGE_EOS:
				C.g_main_loop_quit(loop)
				break loop

			case C.GST_MESSAGE_TAG:
				var tags *C.GstTagList
				C.gst_message_parse_tag(msg, &tags)
				//TagListForeach(tags, ) TODO
				C.gst_tag_list_unref(tags)

			case C.GST_MESSAGE_STATE_CHANGED:
				var newState, oldState C.GstState
				C.gst_message_parse_state_changed(msg, &oldState, &newState, nil)
				p("%s -> %s\n", fromGStr(C.gst_element_state_get_name(oldState)),
					fromGStr(C.gst_element_state_get_name(newState)))

			}

			C.gst_message_unref(msg)
		}
		p("loop break.\n")
	}()

	runtime.LockOSThread()
	C.g_main_loop_run(loop)
	p("quit.\n")
}