[Octave-bug-tracker] [bug #45490] audiowrite / wavwrite writes 32bit samples as int32 instead of float32

[Rik]

Update of bug #45490 (project octave):

                  Status:               Confirmed => Patch Submitted        

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Follow-up Comment #4:

Any action on this bug?  There is a table at
https://www.mathworks.com/help/matlab/ref/audiowrite.html that Octave should
follow.  It lists the output format which depends on the file extension
('.wav'), the class of the input, and the number of bits per sample.

I tried 


audiowrite ('single32.wav', xs, 8000, 'BitsPerSample', 32)
audiowrite ('int32.wav', xint32, 8000, 'BitsPerSample', 32)


and then in the shell I used 'file' to check the resulting WAV formats.  Both
files are


int32.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 32 bit, mono
8000 Hz


It sounded like Mike thought this would be very easy.  I made a stab at it and
am attaching the patch to this report.  I also changed the output to PCM32
when Bits Per Sample is 24 for compatibility with Matlab.  I also added a
decode for Bits Per Sample == 64 which maps to SF_DOUBLE_FORMAT.


(file #41712)
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Additional Item Attachment:

File name: bug45490.cset                  Size:1 KB


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