[IronPython] Reproducing an C# array of floats

[Daniel D.]

Hi Dino, thanks for the quick reply.

Now I'm using System.Single instead float but the error persists.

For some reason the Read (ref. http://is.gd/4Ngjt) method of SlimDX.DirectSound.CaptureBuffer isn't accepting the array reference properly.

Maybe I should try the Microsoft.DirextX.DirectSound lib, but it's been a little bit difficult to find good references about IronPython+DirectSound (probably by own  fault).
 

From: dinov at microsoft.com
To: users at lists.ironpython.com
Date: Wed, 4 Nov 2009 20:20:35 +0000
Subject: Re: [IronPython] Reproducing an C# array of floats



















float in Python is actually double in C#.  You probably want:

 

from System import Single

 

System.Array.CreateInstance(Single, …)

 

And so on.

 

 







From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Daniel D.

Sent: Wednesday, November 04, 2009 12:12 PM

To: users at lists.ironpython.com

Subject: [IronPython] Reproducing an C# array of floats





 

Hi all,



Sorry for the silly question. I'm quite new to ironpython and I've been trying
to solve this issue for the last 3 hours.



I'm not able to reproduce this code in IronPython. 



float[] sample = new float[8192/sizeof(float)]



I've tried the following but nothing seems to work in my specific case:



System.Array.CreateInstance(float, (8192/4))

clr.Reference[System.Array[float]](8192/4)

System.Array[float]([(8192/4)])



I'm trying to use the SlimDX to capture the microphone input, and pass it to
NumPy to do same FFT stuff.



The original C# code is here:
http://crsouza.blogspot.com/2009/08/capturing-sound-from-microphone-using.html



And here my modified version



import clr



clr.AddReference('SlimDX')

from SlimDX import *

from System import *



captureDevice = DirectSound.DirectSoundCapture()

waveFormat = Multimedia.WaveFormat()



waveFormat.FormatTag = Multimedia.WaveFormatTag.IeeeFloat # For Int16, change
to Pcm

waveFormat.BitsPerSample = 32 # Floats are 32 bits

waveFormat.BlockAlignment = (waveFormat.BitsPerSample/8)

waveFormat.Channels = 1



waveFormat.SamplesPerSecond = 44100

waveFormat.AverageBytesPerSecond =
waveFormat.SamplesPerSecond*waveFormat.BlockAlignment*waveFormat.Channels





bufferDescription = DirectSound.CaptureBufferDescription()

bufferDescription.BufferBytes = 8192

bufferDescription.Format = waveFormat

bufferDescription.WaveMapped = False



buffer = DirectSound.CaptureBuffer(captureDevice,bufferDescription)

buffer.Start(True)



#float[] sample = new float[8192/sizeof(float)];

#sample = Array.CreateInstance(float, (8192/4))

#sample = clr.Reference[Array[float]](8192/4)

sample = Array[float]([(8192/4)])



while (True):

    #print sample    

    print buffer.Read(sample, 0, True);    

        



.... which is generating the following error





C:\Documents and Settings\Administrator\My Documents>ipy
sound_capture_test.py

Traceback (most recent call last):

  File "sound_capture_test.py", line 34, in sound_capture_test.py

TypeError: Read() takes at least 2147483647 arguments (3 given)



        



Any help will be very appreciated. 



Thanks,

Daniel













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