Mercurial > hg > octave-nkf
diff scripts/audio/playaudio.m @ 1636:21fe2afb3692
[project @ 1995-11-16 19:16:11 by jwe]
Initial revision
author | jwe |
---|---|
date | Thu, 16 Nov 1995 19:16:11 +0000 |
parents | |
children | 5cffc4b8de57 |
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new file mode 100644 --- /dev/null +++ b/scripts/audio/playaudio.m @@ -0,0 +1,62 @@ +function playaudio (name, ext) + +# usage: playaudio (name [, ext]) +# playaudio (X) +# +# `playaudio ("name" [, "ext"])' plays the audio file "name.ext". The +# default value for the "ext" argument, which has to be written +# without the initial ".", is "lin". +# Currently, the following audio formats are suppored: +# *) linear encoding with extension "lin" or "raw", played using +# /dev/dsp +# *) mu-law encoding with extension "mu", "au" or "snd", played +# using /dev/audio +# +# `playaudio (X)' plays the audio data contained in the vector X. + +# Written by AW (Andreas.Weingessel@ci.tuwien.ac.at) on Apr 11, 1994 +# Last modified by AW on Nov 7, 1994 +# Copyright Dept of Probability Theory and Statistics TU Wien + + file = octave_tmp_file_name (); + + usage_msg = "playaudio (name [, ext]) or playaudio (X)"; + + if (nargin == 1 && is_vector (name) && ! isstr (name)) + # play a vector + [nr, nc] = size (name); + if (nc != 1) + if (nr == 1) + name = name'; + nr = nc; + else + error ("playaudio: X must be a vector"); + endif + endif + X = name + 127; + num = fopen (file, "w"); + c = fwrite (num, X, "uchar"); + fclose (num); + system (sprintf ("cat %s > /dev/dsp", file)); + unlink (file); + elseif (nargin >= 1 && isstr (name)) + # play a file + if (nargin == 1) + name = [name, ".lin"]; + elseif (nargin == 2) + name = [name, ".", ext]; + else + usage (usage_msg); + endif + if (strcmp (ext, "lin") || strcmp (ext, "raw")) + system (sprintf ("cat %s > /dev/dsp", name)); + elseif (strcmp (ext, "mu") || strcmp (ext, "au") || strcmp (ext, "snd")) + system (sprintf ("cat %s > /dev/audio", name)); + else + error ("playaudio does not support given extension"); + endif + else + usage (usage_msg); + endif + +endfunction