diff options
author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-11-04 02:40:09 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-11-04 02:40:09 +0000 |
commit | f8c39a08f6ff651221ff896f8a174abf635f3a0a (patch) | |
tree | ac950750c9c1b65bb563df9c6506858c7f8f30c1 /codecs/mp3/include/itype.h | |
parent | ad46ab972ccf439d1dd3a533335b54089c53e431 (diff) |
Remove really broke MP3 stuff in favor of G.726 in the near future
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@1689 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'codecs/mp3/include/itype.h')
-rwxr-xr-x | codecs/mp3/include/itype.h | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/codecs/mp3/include/itype.h b/codecs/mp3/include/itype.h deleted file mode 100755 index 0b24f40e1..000000000 --- a/codecs/mp3/include/itype.h +++ /dev/null @@ -1,108 +0,0 @@ -/*____________________________________________________________________________ - - FreeAmp - The Free MP3 Player - - MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology - Corp. http://www.xingtech.com - - Portions Copyright (C) 1998 EMusic.com - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id$ -____________________________________________________________________________*/ - -/*--------------------------------------------------------------- - -mpeg Layer II audio decoder, integer version -variable type control - ------------------------------------------------------------------*/ -/*----------------------------------------------------------------- -Variable types can have a large impact on performance. If the -native type int is 32 bit or better, setting all variables to the -native int is probably the best bet. Machines with fast floating -point handware will probably run faster with the floating point -version of this decoder. - -On 16 bit machines, use the native 16 bit int where possible -with special consideration given to the multiplies used in -the dct and window (see below). - - -The code uses the type INT32 when 32 or more bits are required. -Use the native int if possible. -Signed types are required for all but DCTCOEF which may be unsigned. - -THe major parts of the decoder are: bit stream unpack (iup.c), -dct (cidct.c), and window (iwinq.c). The compute time relationship -is usually unpack < dct < window. - --------------------------------------------------------------------*/ - -/*-------------- dct cidct.c ------------------------------------------- -dct input is type SAMPLEINT, output is WININT - -DCTCOEF: dct coefs, 16 or more bits required -DCTBITS: fractional bits in dct coefs. Coefs are unsigned in - the range 0.50 to 10.2. DCTBITS=10 is a compromise - between precision and the possibility of overflowing - intermediate results. - - -DCTSATURATE: If set, saturates dct output to 16 bit. - Dct output may overflow if WININT is 16 bit, overflow - is rare, but very noisy. Define to 1 for 16 bit WININT. - Define to 0 otherwise. - -The multiply used in the dct (routine forward_bf in cidct.c) requires -the multiplication of a 32 bit variable by a 16 bit unsigned coef -to produce a signed 32 bit result. On 16 bit machines this could be -faster than a full 32x32 multiply. - -------------------------------------------------------------------*/ -/*-------------- WINDOW iwinq.c --------------------------------------- -window input is type WININT, output is short (16 bit pcm audio) - -window coefs WINBITS fractional bits, - coefs are signed range in -1.15 to 0.96. - WINBITS=14 is maximum for 16 bit signed representation. - Some CPU's will multiply faster with fewer bits. - WINBITS less that 8 may cause noticeable quality loss. - -WINMULT defines the multiply used in the window (iwinq.c) -WINMULT must produce a 32 bit (or better) result, although both -multipliers may be 16 bit. A 16x16-->32 multiply may offer -a performance advantage if the compiler can be coerced into -doing the right thing. -------------------------------------------------------------------*/ -/*-- settings for MS C++ 4.0 flat 32 bit (long=int=32bit) --*/ -/*-- asm replacement modules must use these settings ---*/ - -typedef long INT32; -typedef unsigned long UINT32; - -typedef int SAMPLEINT; - -typedef int DCTCOEF; - -#define DCTBITS 10 -#define DCTSATURATE 0 - -typedef int WININT; -typedef int WINCOEF; - -#define WINBITS 10 -#define WINMULT(x,coef) ((x)*(coef)) |