From 5f647c8fef33f35210d550ad1477ef43520b32a3 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sat, 20 Nov 2004 16:23:53 +0000 Subject: * add µlaw/alaw support * abstracted resampler API * add integer-only resampler ("trivial") * show used resampler wherever useful * add mixing/volume adjusting for float32ne and u8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@294 fefdeb5f-60dc-0310-8127-8f9354f1896f --- polyp/g711.h | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 polyp/g711.h (limited to 'polyp/g711.h') diff --git a/polyp/g711.h b/polyp/g711.h new file mode 100644 index 00000000..97cedf81 --- /dev/null +++ b/polyp/g711.h @@ -0,0 +1,40 @@ +#ifndef foog711hfoo +#define foog711hfoo + +/* g711.h - include for G711 u-law and a-law conversion routines +** +** Copyright (C) 2001 Chris Bagwell +** +** Permission to use, copy, modify, and distribute this software and its +** documentation for any purpose and without fee is hereby granted, provided +** that the above copyright notice appear in all copies and that both that +** copyright notice and this permission notice appear in supporting +** documentation. This software is provided "as is" without express or +** implied warranty. +*/ + +/** Copied from sox -- Lennart Poettring*/ + +#include + +#ifdef FAST_ALAW_CONVERSION +extern uint8_t _st_13linear2alaw[0x2000]; +extern int16_t _st_alaw2linear16[256]; +#define st_13linear2alaw(sw) (_st_13linear2alaw[(sw + 0x1000)]) +#define st_alaw2linear16(uc) (_st_alaw2linear16[uc]) +#else +unsigned char st_13linear2alaw(int16_t pcm_val); +int16_t st_alaw2linear16(unsigned char); +#endif + +#ifdef FAST_ULAW_CONVERSION +extern uint8_t _st_14linear2ulaw[0x4000]; +extern int16_t _st_ulaw2linear16[256]; +#define st_14linear2ulaw(sw) (_st_14linear2ulaw[(sw + 0x2000)]) +#define st_ulaw2linear16(uc) (_st_ulaw2linear16[uc]) +#else +unsigned char st_14linear2ulaw(int16_t pcm_val); +int16_t st_ulaw2linear16(unsigned char); +#endif + +#endif -- cgit