Re: [LAU] sndfile-waveform PNG generator ?

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To: <tim@...>
Cc: <linux-audio-user@...>
Date: Tuesday, January 10, 2012 - 8:32 pm

On 01/10/2012 08:42 PM, Tim Orford wrote:

Hi Tim,
dreaming up --help:

Usage: snd2png
Options:
-o write PNG to file instead of STDOUT
-w width in pixels (default 800)
-h height in pixels (default 192)

maybe:
-A annotate axes with sample-number (X), value (Y).
add info-box: sample-rate, bit-format.
-c foreground color (RGBA) 0x000000ff (black)
-C background color (RGBA) 0xffffff80 (semi transp white)

maybe later:
-l log-scale
-r rectified waveform shape
-F specify font for annotations
-t use timecode instead of sample-numbers for x-axis
-T timecode start-offset - override BWF header info
-M add meta-data to annotations.
-f FFT analyze, colour highlight peak freq.

In general: keep it professional (scientific) and simple.

I've been thinking of throwing some time at forking sndfile-spectrogram
which already has all required infrastructure (and more). I don't think
a dedicated libwaveform is needed. It's pretty straight forward, isn't
it? I was actually surprised that there's actually no sndfile-waveform
tool, yet! -- Yeah right. It's a gimmick :)

> While I am posting to the list, I would like to improve

AFAIK you can use cairo-surface as OpenGL-textures.

> does anyone have any

Nope, none that you would not already know.
That reminds me: How are things going with SampleCat?

> Regards

greetings,
robin
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Messages in current thread:
Re: [LAU] sndfile-waveform PNG generator ?, Robin Gareus, (Tue Jan 10, 2:38 pm)
Re: [LAU] sndfile-waveform PNG generator ?, Tim Orford, (Tue Jan 10, 7:43 pm)
Re: [LAU] libwaveform was Re: sndfile-waveform PNG generator ?, Erik de Castro Lopo, (Thu Feb 2, 10:04 pm)
Re: [LAU] libwaveform was Re: sndfile-waveform PNG generator ?, Erik de Castro Lopo, (Thu Feb 2, 10:58 pm)
Re: [LAU] sndfile-waveform PNG generator ?, Robin Gareus, (Tue Jan 10, 8:32 pm)
Re: [LAU] sndfile-waveform PNG generator ?, Joel Roth, (Tue Jan 10, 10:36 pm)
Re: [LAU] sndfile-waveform PNG generator ?, Erik de Castro Lopo, (Tue Jan 10, 9:13 pm)
Re: [LAU] sndfile-waveform PNG generator ?, carmen, (Wed Jan 11, 5:21 am)
Re: [LAU] sndfile-waveform PNG generator ?, Robin Gareus, (Wed Jan 11, 1:36 am)
Re: [LAU] sndfile-waveform PNG generator ?, Robin Gareus, (Wed Jan 11, 5:04 pm)
Re: [LAU] sndfile-waveform PNG generator ?, Erik de Castro Lopo, (Sat Jan 14, 2:57 am)