Beispiel #1
0
func oggplayer() {
	pipeline := C.gst_pipeline_new(toGStr("audio-player"))
	source, err := NewElement("filesrc", "file-source")
	if err != nil {
		log.Fatal(err)
	}
	demuxer, err := NewElement("oggdemux", "ogg-demuxer")
	if err != nil {
		log.Fatal(err)
	}
	decoder, err := NewElement("vorbisdec", "vorbis-decoder")
	if err != nil {
		log.Fatal(err)
	}
	conv, err := NewElement("audioconvert", "converter")
	if err != nil {
		log.Fatal(err)
	}
	sink, err := NewElement("autoaudiosink", "audio-output")
	if err != nil {
		log.Fatal(err)
	}

	ObjSet(asGObj(source), "location", os.Args[1])
	messages := PipelineWatchBus(asGstPipeline(pipeline))
	BinAdd(pipeline, source, demuxer, decoder, conv, sink)
	ElementLink(source, demuxer)
	ElementLink(decoder, conv, sink)
	ObjConnect(asGObj(demuxer), "pad-added", func(elem *C.GstElement, pad *C.GstPad) {
		sink := C.gst_element_get_static_pad(decoder, toGStr("sink"))
		C.gst_pad_link(pad, sink)
		C.gst_object_unref(asGPtr(sink))
	})
	C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)

	go func() {
		for msg := range messages {
			MessageDump(msg)
		}
	}()

	go func() {
		var pos, length C.gint64
		for _ = range time.NewTicker(time.Second * 1).C {
			C.gst_element_query_position(pipeline, C.GST_FORMAT_TIME, &pos)
			C.gst_element_query_duration(pipeline, C.GST_FORMAT_TIME, &length)
			p("%v / %v\n", time.Duration(pos), time.Duration(length))
			if time.Duration(pos) > time.Second*5 {
				C.gst_element_seek(pipeline, 1.0, C.GST_FORMAT_TIME, C.GST_SEEK_FLAG_FLUSH,
					C.GST_SEEK_TYPE_SET, 10,
					C.GST_SEEK_TYPE_NONE, C.GST_CLOCK_TIME_NONE)
			}
		}
	}()

	loop := C.g_main_loop_new(nil, False())
	C.g_main_loop_run(loop)
}
Beispiel #2
0
// QueryDuration() is a wrapper around gst_element_query_duration().
func (v *Element) QueryDuration(format Format) (cur int64, success bool) {
	var ccur C.gint64
	c := C.gst_element_query_duration(v.native(), C.GstFormat(format), &ccur)
	return int64(ccur), gobool(c)
}