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-rw-r--r--ac3dec/exponent.c132
1 files changed, 0 insertions, 132 deletions
diff --git a/ac3dec/exponent.c b/ac3dec/exponent.c
deleted file mode 100644
index 16fca46..0000000
--- a/ac3dec/exponent.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * exponent.c
- *
- * Copyright (C) Aaron Holtzman - May 1999
- *
- * This file is part of ac3dec, a free Dolby AC-3 stream decoder.
- *
- * ac3dec 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, or (at your option)
- * any later version.
- *
- * ac3dec 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 GNU Make; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "ac3.h"
-#include "ac3_internal.h"
-
-
-#include "exponent.h"
-
-
-static inline void exp_unpack_ch(uint16_t type,uint16_t expstr,uint16_t ngrps,uint16_t initial_exp, uint16_t exps[], uint16_t *dest);
-
-
-/**
- *
- **/
-
-void exponent_unpack( bsi_t *bsi, audblk_t *audblk)
-{
- uint16_t i;
-
- for(i=0; i< bsi->nfchans; i++)
- exp_unpack_ch(UNPACK_FBW, audblk->chexpstr[i], audblk->nchgrps[i], audblk->exps[i][0], &audblk->exps[i][1], audblk->fbw_exp[i]);
-
- if(audblk->cplinu)
- exp_unpack_ch(UNPACK_CPL, audblk->cplexpstr, audblk->ncplgrps, audblk->cplabsexp << 1, audblk->cplexps, &audblk->cpl_exp[audblk->cplstrtmant]);
-
- if(bsi->lfeon)
- exp_unpack_ch(UNPACK_LFE, audblk->lfeexpstr, 2, audblk->lfeexps[0], &audblk->lfeexps[1], audblk->lfe_exp);
-}
-
-
-/**
- *
- **/
-
-static inline void exp_unpack_ch(uint16_t type,uint16_t expstr,uint16_t ngrps,uint16_t initial_exp,
- uint16_t exps[], uint16_t *dest)
-{
- uint16_t i,j;
- int16_t exp_acc;
- int16_t exp_1,exp_2,exp_3;
-
- if (expstr == EXP_REUSE)
- return;
-
- /* Handle the initial absolute exponent */
- exp_acc = initial_exp;
- j = 0;
-
- /* In the case of a fbw channel then the initial absolute values is
- * also an exponent */
- if(type != UNPACK_CPL)
- dest[j++] = exp_acc;
-
- /* Loop through the groups and fill the dest array appropriately */
- for(i=0; i< ngrps; i++) {
- if(exps[i] > 124)
- goto error;
-
- exp_1 = exps[i] / 25;
- exp_2 = (exps[i] - (exp_1 * 25)) / 5;
- exp_3 = exps[i] - (exp_1 * 25) - (exp_2 * 5) ;
-
- exp_acc += (exp_1 - 2);
-
- switch(expstr) {
- case EXP_D45:
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- case EXP_D25:
- dest[j++] = exp_acc;
- case EXP_D15:
- dest[j++] = exp_acc;
- }
-
- exp_acc += (exp_2 - 2);
-
- switch(expstr) {
- case EXP_D45:
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- case EXP_D25:
- dest[j++] = exp_acc;
- case EXP_D15:
- dest[j++] = exp_acc;
- }
-
- exp_acc += (exp_3 - 2);
-
- switch(expstr) {
- case EXP_D45:
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- case EXP_D25:
- dest[j++] = exp_acc;
- case EXP_D15:
- dest[j++] = exp_acc;
- }
- }
-
- return;
-error:
-#ifdef DEBUG
- fprintf (stderr,"** Invalid exponent - skipping frame **\n");
-#endif
- HANDLE_ERROR ();
-}
-