diff options
Diffstat (limited to 'Doc/lib/libaudioop.tex')
| -rw-r--r-- | Doc/lib/libaudioop.tex | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Doc/lib/libaudioop.tex b/Doc/lib/libaudioop.tex index b700155..69a3a83 100644 --- a/Doc/lib/libaudioop.tex +++ b/Doc/lib/libaudioop.tex @@ -13,7 +13,7 @@ otherwise the sample size (in bytes) is always a parameter of the operation. The module defines the following variables and functions: -\renewcommand{\indexsubitem}{(in module audioop)} +\setindexsubitem{(in module audioop)} \begin{excdesc}{error} This exception is raised on all errors, such as unknown number of bytes per sample, etc. @@ -201,7 +201,7 @@ distinction between mono and stereo fragments, i.e.\ all samples are treated equal. If this is a problem the stereo fragment should be split into two mono fragments first and recombined later. Here is an example of how to do that: -\bcode\begin{verbatim} +\begin{verbatim} def mul_stereo(sample, width, lfactor, rfactor): lsample = audioop.tomono(sample, width, 1, 0) rsample = audioop.tomono(sample, width, 0, 1) @@ -210,7 +210,7 @@ def mul_stereo(sample, width, lfactor, rfactor): lsample = audioop.tostereo(lsample, width, 1, 0) rsample = audioop.tostereo(rsample, width, 0, 1) return audioop.add(lsample, rsample, width) -\end{verbatim}\ecode +\end{verbatim} % If you use the ADPCM coder to build network packets and you want your protocol to be stateless (i.e.\ to be able to tolerate packet loss) @@ -231,7 +231,7 @@ They are primarily meant to do echo cancellation. A reasonably fast way to do this is to pick the most energetic piece of the output sample, locate that in the input sample and subtract the whole output sample from the input sample: -\bcode\begin{verbatim} +\begin{verbatim} def echocancel(outputdata, inputdata): pos = audioop.findmax(outputdata, 800) # one tenth second out_test = outputdata[pos*2:] @@ -244,4 +244,4 @@ def echocancel(outputdata, inputdata): postfill = '\0'*(len(inputdata)-len(prefill)-len(outputdata)) outputdata = prefill + audioop.mul(outputdata,2,-factor) + postfill return audioop.add(inputdata, outputdata, 2) -\end{verbatim}\ecode +\end{verbatim} |