ref: a188768fb3df7ca7cce2c0abaa58ff945cdf4ea4
dir: /TODO/
People are encouraged to pick some of these and implement it. Send
all patches to cbagwell@sprynet.com.
o I've add the most common and public standard FormatTags to the
.wav file detection. A lot of them should be implemented since
you can grab the source code from the .au handler and software
is avaliable from public sources for the rest.
o highpass and lowpass filters don't let you specify the cut
of freq. Need some improvements to these filters.
SJB: The old highp.c filter is IMHO broken, need to review that code.
o Create a version of OSS and Sun driver that can play and record from the
same device in duplex.
o Internally sox can handle multiple effects on a given sound file.
Add support for this from the command line.
o Add support for mixing multiple inputs from command line.
o Endian checks are probably invalid on 64-bit machines. Need to use
something a more constant size the "int". Probably should make it
at least a util function/macro that can be overriden at compile time.
o Enhance sox for better interactive support. This includes updating
effect parameters in real time and ablity to start/stop/scan
file handlers in real time.
o More handlers! Everyone who adds sound hardware to a computer has
the urge to come up with their own file format.
o More effects! I don't know DSP at all. A Pitch Shifter is high
on the list. Spectrum analyser, etc, using FFTW lib.
o Loop support for all formats that know about it. WAV has
some support for loops ("cue-points") but no support for
MIDI note numbers. Someone needs to add this in.
o Comment strings. Some file formats have space for embedded comments.
These are currently thrown away. Printing them out, carrying them
forward, and an to add new ones would be handy.
o Add support for .TXT format as Cooledit supports. Not really fit for
graphing since it is only a stream of ascii sample values but some
program appear to like it. Also has a much nicer header.
http://lab.chass.utoronto.ca/damion/audio/coolwav.htm
o Update auto file type to include detection of .wve and .smp files.
o This software wants to be a dataflow system with signal
sources, sinks, and processors. It wants to be class-based.
It wants to have a scripting control language.
It's really a shame I hate C++.
o Keep sox from using "fail" on errors. Sox was supposed to be
a sound library called "ST" but libraries shouldn't exit a program,
they should return error codes for users to handle.
o Enhance general robustness... For instance, malloc is called in
lots of places without checking its return value.
SOX includes skeleton format files to assist you in supporting new
formats, sound effect loops, and special-purpose programs.
The full skeleton format, skel.c, helps you write a driver
for a new format which has data structures. Skeleff.c is
a starting point for writing a sound effect loop. Sox.c is
a good starting point for new programs. (Someone finally
did this and told me what was wrong...)
In handlers.c, note that many formats set up the header and then
use the raw driver for reading and writing.