[flac-dev] Regain play analysis patches

[Earl Chew]

I'm a little reluctant to introduce another compiled program when there are
so many other options that will work well enough out of the box.

Here are two ideas:

1. Use bc(1) to compute the raw samples
2. Use perl(1) to compute the raw samples

To generate raw unsigned samples using bc(1) for example:

samplerate = 1000;
duration = 2;
bitspersample = 24;

samplerange = 2 ^ (bitspersample-1) - 1;
samplemidpoint = 2 ^ (bitspersample-1);

pi = 4 * a(1);

scale = 18;
obase = 16;

for (ix = 0; ix < duration * samplerate; ++ix) {
  sample = samplemidpoint + samplerange * s(2 * pi * ix / samplerate);
  s = scale;
  scale = 0;
  sample /= 1;
  sample;
  scale = s;
}



Are you ok with bc(1) ?   Or would you prefer perl(1) ?   Or something else ?


Earl


----- Original Message -----
From: Erik de Castro Lopo <mle+la at mega-nerd.com>
To: flac-dev at xiph.org
Cc: 
Sent: Tuesday, February 14, 2012 6:52:34 PM
Subject: Re: [flac-dev] Regain play analysis patches

Brian Willoughby wrote:

> What about using the C library sin() and cos() functions to generate  
> the test audio instead of sox?  I did not see a description of how  
> the test files are generated, so maybe this is easy or maybe it is  
> hard.  The benefit of shipping the test audio generation source code  
> around with the FLAC sources is that the tests won't break when sox  
> is modified.

+1

Erik
-- 
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
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