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bpo-2716: add license for audioop module (GH-19972)

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(cherry picked from commit 4c1145bb37)

Co-authored-by: Furkan Onder <furkanonder@protonmail.com>
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Miss Islington (bot) 2022-10-21 16:07:30 -07:00 • committed by GitHub
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2 changed files with 55 additions and 14 deletions
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44
Modules/audioop.c
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@ -1,3 +1,33 @@
/* The audioop module uses the code base in g777.c file of the Sox project.
* Source: https://web.archive.org/web/19970716121258/http://www.spies.com/Sox/Archive/soxgamma.tar.gz
* Programming the AdLib/Sound Blaster
* FM Music Chips
* Version 2.0 (24 Feb 1992)
*
* Copyright (c) 1991, 1992 by Jeffrey S. Lee
*
* jlee@smylex.uucp
*
*
*
* Warranty and Copyright Policy
*
* This document is provided on an "as-is" basis, and its author makes
* no warranty or representation, express or implied, with respect to
* its quality performance or fitness for a particular purpose. In no
* event will the author of this document be liable for direct, indirect,
* special, incidental, or consequential damages arising out of the use
* or inability to use the information contained within. Use of this
* document is at your own risk.
*
* This file may be used and copied freely so long as the applicable
* copyright notices are retained, and no modifications are made to the
* text of the document. No money shall be charged for its distribution
* beyond reasonable shipping, handling and duplication costs, nor shall
* proprietary changes be made to this document so that it cannot be
* distributed freely. This document may not be included in published
* material or commercial packages without the written consent of its
* author. */
/* audioopmodule - Module to detect peak values in arrays */
@ -28,20 +58,6 @@ fbound(double val, double minval, double maxval)
}
/* Code shamelessly stolen from sox, 12.17.7, g711.c
** (c) Craig Reese, Joe Campbell and Jeff Poskanzer 1989 */
/* From g711.c:
*
* December 30, 1994:
* Functions linear2alaw, linear2ulaw have been updated to correctly
* convert unquantized 16 bit values.
* Tables for direct u- to A-law and A- to u-law conversions have been
* corrected.
* Borge Lindberg, Center for PersonKommunikation, Aalborg University.
* bli@cpk.auc.dk
*
*/
#define BIAS 0x84 /* define the add-in bias for 16 bit samples */
#define CLIP 32635
#define SIGN_BIT (0x80) /* Sign bit for an A-law byte. */