public BpmDetector()
{
try {
pipeline = new Pipeline();
filesrc = new FileSrc();
var decodebin = new DecodeBin2();
var audioconvert = Make("audioconvert");
var bpmdetect = Make("bpmdetect");
fakesink = new FakeSink();
pipeline.Add(filesrc, decodebin, audioconvert, bpmdetect, fakesink);
if (!filesrc.Link(decodebin))
{
Log.Error("Could not link pipeline elements");
throw new Exception();
}
// decodebin and audioconvert are linked dynamically when the decodebin creates a new pad
decodebin.NewDecodedPad += delegate(object o, DecodeBin2.NewDecodedPadArgs args) {
var audiopad = audioconvert.GetStaticPad("sink");
if (audiopad.IsLinked)
{
return;
}
using (var caps = args.Pad.Caps) {
using (var str = caps[0]) {
if (!str.Name.Contains("audio"))
{
return;
}
}
}
args.Pad.Link(audiopad);
};
if (!Element.Link(audioconvert, bpmdetect, fakesink))
{
Log.Error("Could not link pipeline elements");
throw new Exception();
}
pipeline.Bus.AddWatch(OnBusMessage);
//gst_bus_add_watch (gst_pipeline_get_bus (GST_PIPELINE (detector->pipeline)), bbd_pipeline_bus_callback, detector);
} catch (Exception e) {
Log.Exception(e);
throw new ApplicationException(Catalog.GetString("Could not create BPM detection driver."), e);
}
}
private void ConstructPipeline()
{
pipeline = new Pipeline("pipeline");
filesrc = ElementFactory.Make("filesrc", "filesrc") as FileSrc;
filesink = ElementFactory.Make("filesink", "filesink") as FileSink;
audioconvert = ElementFactory.Make("audioconvert", "audioconvert");
encoder = ElementFactory.Make("wavenc", "wavenc");
decodebin = ElementFactory.Make("decodebin2", "decodebin") as DecodeBin2;
decodebin.NewDecodedPad += OnNewDecodedPad;
pipeline.Add(filesrc, decodebin, audioconvert, encoder, filesink);
filesrc.Link(decodebin);
audioconvert.Link(encoder);
encoder.Link(filesink);
pipeline.Bus.AddWatch(new BusFunc(OnBusMessage));
}