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authormarkster <markster@f38db490-d61c-443f-a65b-d21fe96a405b>2003-11-04 02:40:09 +0000
committermarkster <markster@f38db490-d61c-443f-a65b-d21fe96a405b>2003-11-04 02:40:09 +0000
commitf8c39a08f6ff651221ff896f8a174abf635f3a0a (patch)
treeac950750c9c1b65bb563df9c6506858c7f8f30c1 /codecs/mp3/src/msis.c
parentad46ab972ccf439d1dd3a533335b54089c53e431 (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/src/msis.c')
-rwxr-xr-xcodecs/mp3/src/msis.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/codecs/mp3/src/msis.c b/codecs/mp3/src/msis.c
deleted file mode 100755
index a30e534b9..000000000
--- a/codecs/mp3/src/msis.c
+++ /dev/null
@@ -1,300 +0,0 @@
-/*____________________________________________________________________________
-
- FreeAmp - The Free MP3 Player
-
- MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology
- Corp. http://www.xingtech.com
-
- Portions Copyright (C) 1998-1999 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.
-
- $Id$
-____________________________________________________________________________*/
-
-/**** msis.c ***************************************************
- Layer III
- antialias, ms and is stereo precessing
-
-**** is_process assumes never switch
- from short to long in is region *****
-
-is_process does ms or stereo in "forbidded sf regions"
- //ms_mode = 0
- lr[0][i][0] = 1.0f;
- lr[0][i][1] = 0.0f;
- // ms_mode = 1, in is bands is routine does ms processing
- lr[1][i][0] = 1.0f;
- lr[1][i][1] = 1.0f;
-
-******************************************************************/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <float.h>
-#include <math.h>
-#include "L3.h"
-#include "mhead.h"
-
-/* The functions are different than their prototypes, by design */
-
-typedef float ARRAY2[2];
-typedef float ARRAY8_2[8][2];
-
-
-/* nBand[0] = long, nBand[1] = short */
-
-/* intensity stereo */
-/* if ms mode quant pre-scales all values by 1.0/sqrt(2.0) ms_mode in table
- compensates */
-
-
-/* intensity stereo MPEG2 */
-/* lr2[intensity_scale][ms_mode][sflen_offset+sf][left/right] */
-typedef float ARRAY2_64_2[2][64][2];
-typedef float ARRAY64_2[64][2];
-
-#ifdef ASM_X86
-extern void antialias_asm(float x[], int n);
-#endif /* ASM_X86 */
-
-
-/*===============================================================*/
-ARRAY2 *alias_init_addr(MPEG *m)
-{
- return m->cupl.csa;
-}
-/*-----------------------------------------------------------*/
-ARRAY8_2 *msis_init_addr(MPEG *m)
-{
-/*-------
-pi = 4.0*atan(1.0);
-t = pi/12.0;
-for(i=0;i<7;i++) {
- s = sin(i*t);
- c = cos(i*t);
- // ms_mode = 0
- m->cupl.lr[0][i][0] = (float)(s/(s+c));
- m->cupl.lr[0][i][1] = (float)(c/(s+c));
- // ms_mode = 1
- m->cupl.lr[1][i][0] = (float)(sqrt(2.0)*(s/(s+c)));
- m->cupl.lr[1][i][1] = (float)(sqrt(2.0)*(c/(s+c)));
-}
-//sf = 7
-//ms_mode = 0
-m->cupl.lr[0][i][0] = 1.0f;
-m->cupl.lr[0][i][1] = 0.0f;
-// ms_mode = 1, in is bands is routine does ms processing
-m->cupl.lr[1][i][0] = 1.0f;
-m->cupl.lr[1][i][1] = 1.0f;
-------------*/
-
- return m->cupl.lr;
-}
-/*-------------------------------------------------------------*/
-ARRAY2_64_2 *msis_init_addr_MPEG2(MPEG *m)
-{
- return m->cupl.lr2;
-}
-/*===============================================================*/
-void antialias(MPEG *m, float x[], int n)
-{
-#ifdef ASM_X86
- antialias_asm(x, n);
-#else
- int i, k;
- float a, b;
-
- for (k = 0; k < n; k++)
- {
- for (i = 0; i < 8; i++)
- {
- a = x[17 - i];
- b = x[18 + i];
- x[17 - i] = a * m->cupl.csa[i][0] - b * m->cupl.csa[i][1];
- x[18 + i] = b * m->cupl.csa[i][0] + a * m->cupl.csa[i][1];
- }
- x += 18;
- }
-#endif
-}
-/*===============================================================*/
-void ms_process(float x[][1152], int n) /* sum-difference stereo */
-{
- int i;
- float xl, xr;
-
-/*-- note: sqrt(2) done scaling by dequant ---*/
- for (i = 0; i < n; i++)
- {
- xl = x[0][i] + x[1][i];
- xr = x[0][i] - x[1][i];
- x[0][i] = xl;
- x[1][i] = xr;
- }
- return;
-}
-/*===============================================================*/
-void is_process_MPEG1(MPEG *vm, float x[][1152], /* intensity stereo */
- SCALEFACT * sf,
- CB_INFO cb_info[2], /* [ch] */
- int nsamp, int ms_mode)
-{
- int i, j, n, cb, w;
- float fl, fr;
- int m;
- int isf;
- float fls[3], frs[3];
- int cb0;
-
-
- cb0 = cb_info[1].cbmax; /* start at end of right */
- i = vm->cupl.sfBandIndex[cb_info[1].cbtype][cb0];
- cb0++;
- m = nsamp - i; /* process to len of left */
-
- if (cb_info[1].cbtype)
- goto short_blocks;
-/*------------------------*/
-/* long_blocks: */
- for (cb = cb0; cb < 21; cb++)
- {
- isf = sf->l[cb];
- n = vm->cupl.nBand[0][cb];
- fl = vm->cupl.lr[ms_mode][isf][0];
- fr = vm->cupl.lr[ms_mode][isf][1];
- for (j = 0; j < n; j++, i++)
- {
- if (--m < 0)
- goto exit;
- x[1][i] = fr * x[0][i];
- x[0][i] = fl * x[0][i];
- }
- }
- return;
-/*------------------------*/
- short_blocks:
- for (cb = cb0; cb < 12; cb++)
- {
- for (w = 0; w < 3; w++)
- {
- isf = sf->s[w][cb];
- fls[w] = vm->cupl.lr[ms_mode][isf][0];
- frs[w] = vm->cupl.lr[ms_mode][isf][1];
- }
- n = vm->cupl.nBand[1][cb];
- for (j = 0; j < n; j++)
- {
- m -= 3;
- if (m < 0)
- goto exit;
- x[1][i] = frs[0] * x[0][i];
- x[0][i] = fls[0] * x[0][i];
- x[1][1 + i] = frs[1] * x[0][1 + i];
- x[0][1 + i] = fls[1] * x[0][1 + i];
- x[1][2 + i] = frs[2] * x[0][2 + i];
- x[0][2 + i] = fls[2] * x[0][2 + i];
- i += 3;
- }
- }
-
- exit:
- return;
-}
-/*===============================================================*/
-void is_process_MPEG2(MPEG *vm, float x[][1152], /* intensity stereo */
- SCALEFACT * sf,
- CB_INFO cb_info[2], /* [ch] */
- IS_SF_INFO * is_sf_info,
- int nsamp, int ms_mode)
-{
- int i, j, k, n, cb, w;
- float fl, fr;
- int m;
- int isf;
- int il[21];
- int tmp;
- int r;
- ARRAY2 *lr;
- int cb0, cb1;
-
- lr = vm->cupl.lr2[is_sf_info->intensity_scale][ms_mode];
-
- if (cb_info[1].cbtype)
- goto short_blocks;
-
-/*------------------------*/
-/* long_blocks: */
- cb0 = cb_info[1].cbmax; /* start at end of right */
- i = vm->cupl.sfBandIndex[0][cb0];
- m = nsamp - i; /* process to len of left */
-/* gen sf info */
- for (k = r = 0; r < 3; r++)
- {
- tmp = (1 << is_sf_info->slen[r]) - 1;
- for (j = 0; j < is_sf_info->nr[r]; j++, k++)
- il[k] = tmp;
- }
- for (cb = cb0 + 1; cb < 21; cb++)
- {
- isf = il[cb] + sf->l[cb];
- fl = lr[isf][0];
- fr = lr[isf][1];
- n = vm->cupl.nBand[0][cb];
- for (j = 0; j < n; j++, i++)
- {
- if (--m < 0)
- goto exit;
- x[1][i] = fr * x[0][i];
- x[0][i] = fl * x[0][i];
- }
- }
- return;
-/*------------------------*/
- short_blocks:
-
- for (k = r = 0; r < 3; r++)
- {
- tmp = (1 << is_sf_info->slen[r]) - 1;
- for (j = 0; j < is_sf_info->nr[r]; j++, k++)
- il[k] = tmp;
- }
-
- for (w = 0; w < 3; w++)
- {
- cb0 = cb_info[1].cbmax_s[w]; /* start at end of right */
- i = vm->cupl.sfBandIndex[1][cb0] + w;
- cb1 = cb_info[0].cbmax_s[w]; /* process to end of left */
-
- for (cb = cb0 + 1; cb <= cb1; cb++)
- {
- isf = il[cb] + sf->s[w][cb];
- fl = lr[isf][0];
- fr = lr[isf][1];
- n = vm->cupl.nBand[1][cb];
- for (j = 0; j < n; j++)
- {
- x[1][i] = fr * x[0][i];
- x[0][i] = fl * x[0][i];
- i += 3;
- }
- }
-
- }
-
- exit:
- return;
-}
-/*===============================================================*/