public void TestAdd() {
Bin bin = new Bin ("test-bin");
Element e1 = new FakeSrc ("fakesrc");
Element e2 = new FakeSink ("fakesink");
Assert.IsNotNull (bin, "Could not create bin");
Assert.IsNotNull (e1, "Could not create fakesrc");
Assert.IsNotNull (e2, "Could not create fakesink");
bin.Add (e1, e2);
Assert.AreEqual (bin.ChildrenCount, 2);
}
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);
}
}
public void TestAddRemove() {
Bin bin = ElementFactory.Make ("bin") as Bin;
Assert.IsNotNull (bin, "Could not create bin");
Element e1 = new FakeSrc ("fakesrc");
Element e2 = new Identity ("identity");
Element e3 = new FakeSink ("fakesink");
Assert.IsNotNull (e1, "Could not create fakesrc");
Assert.IsNotNull (e2, "Could not create identity");
Assert.IsNotNull (e3, "Could not create fakesink");
bin.Add (e1, e2, e3);
Element.Link (e1, e2, e3);
Assert.AreEqual (bin.ChildrenCount, 3);
bin.Remove (e2, e3);
Assert.AreEqual (bin.ChildrenCount, 1);
bin.Add (e2);
Assert.AreEqual (bin.ChildrenCount, 2);
bin.Remove (e1, e2);
Assert.AreEqual (bin.ChildrenCount, 0);
}
private void PCMHandoff (object o, FakeSink.HandoffArgs args)
{
Gst.Buffer data;
if (OnDataAvailable == null) {
return;
}
if (vis_thawing) {
// Flush our buffers out.
vis_buffer.Clear ();
System.Array.Clear (vis_fft_sample_buffer, 0, vis_fft_sample_buffer.Length);
vis_thawing = false;
}
Structure structure = args.Buffer.Caps [0];
int channels = (int)structure.GetValue ("channels");
wanted_size = (uint)(channels * SLICE_SIZE * sizeof (float));
//TODO see if buffer need a copy or not
//but copy is no available in gst# ;(
vis_buffer.Push (args.Buffer);
int i, j;
while ((data = vis_buffer.Peek (wanted_size)) != null) {
float[] buff = new float[data.Size];
Marshal.Copy (data.Data, buff, 0, (int) data.Size);
float[] deinterlaced = new float [channels * SLICE_SIZE];
float[] specbuf = new float [SLICE_SIZE * 2];
System.Array.Copy (specbuf, vis_fft_sample_buffer, SLICE_SIZE);
for (i = 0; i < SLICE_SIZE; i++) {
float avg = 0.0f;
for (j = 0; j < channels; j++) {
float sample = buff[i * channels + j];
deinterlaced[j * SLICE_SIZE + i] = sample;
avg += sample;
}
avg /= channels;
specbuf[i + SLICE_SIZE] = avg;
}
System.Array.Copy (vis_fft_sample_buffer, 0, specbuf, SLICE_SIZE, SLICE_SIZE);
gst_fft_f32_window (vis_fft, specbuf, FFTWindow.Hamming);
gst_fft_f32_fft (vis_fft, specbuf, vis_fft_buffer);
for (i = 0; i < SLICE_SIZE; i++) {
float val;
GstFFTF32Complex cplx = vis_fft_buffer[i];
val = cplx.r * cplx.r + cplx.i * cplx.i;
val /= SLICE_SIZE * SLICE_SIZE;
val = (float)(10.0f * System.Math.Log10 ((double)val));
val = (val + 60.0f) / 60.0f;
if (val < 0.0f)
val = 0.0f;
specbuf[i] = val;
}
float [] flat = new float[channels * SLICE_SIZE];
System.Array.Copy (deinterlaced, flat, flat.Length);
float [][] cbd = new float[channels][];
for (int k = 0; k < channels; k++) {
float [] channel = new float[SLICE_SIZE];
System.Array.Copy (flat, k * SLICE_SIZE, channel, 0, SLICE_SIZE);
cbd [k] = channel;
}
float [] spec = new float [SLICE_SIZE];
System.Array.Copy (specbuf, spec, SLICE_SIZE);
try {
OnDataAvailable (cbd, new float[][] { spec });
} catch (System.Exception e) {
Log.Exception ("Uncaught exception during visualization data post.", e);
}
vis_buffer.Flush ((uint)wanted_size);
}
}
