#102 [PATCH] modified spectrogram hh:mm:ss in X-axis

[dettox]

modified spectrogram.c, added option "-g", show time tick labels in hh:mm:ss when the tick is in seconds, you can find the patch as attachment

[dettox]

here a screenshot of the usage and the new help:

$sox --help-effect spectrogram

sox: SoX v14.4.2

Effect usage:

spectrogram [options]
-x num X-axis size in pixels; default derived or 800
-X num X-axis pixels/second; default derived or 100
-y num Y-axis size in pixels (per channel); slow if not 1 + 2^n
-Y num Y-height total (i.e. not per channel); default 550
-z num Z-axis range in dB; default 120
-Z num Z-axis maximum in dBFS; default 0
-q num Z-axis quantisation (0 - 249); default 249
-w name Window: Hann(default)/Hamming/Bartlett/Rectangular/Kaiser/Dolph
-W num Window adjust parameter (-10 - 10); applies only to Kaiser/Dolph
-s Slack overlap of windows
-a Suppress axis lines
-r Raw spectrogram; no axes or legends
-l Light background
-m Monochrome
-h High colour
-g X-axis time in hh:mm:ss format
-p num Permute colours (1 - 6); default 1
-A Alternative, inferior, fixed colour-set (for compatibility only)
-t text Title text
-c text Comment text
-o text Output file name; default `spectrogram.png'
-d time Audio duration to fit to X-axis; e.g. 1:00, 48
-S position Start the spectrogram at the given input position

[Martin Guy]

This has several issues:
- it doesn't apply cleanly to the git master HEAD
- the formatting doesn't match the exiting code
- the compiler reports that "i" may be used uninitialized at line 915 (tick=i/10) and the later "Tick label" line. Use of i here, left over from the end of a previous loop, is bizarre.
- I've tried applying the failed patch (to spectrogram.c) manually to git master HEAD, but the x-axis ticks remain in seconds, and "Time (s)" is replaced by the file length in HMS format (that's probably my fault in misapplying it)

I suggest this be closed until these issues are addressed