-#include <stdio.h> /* "intf_msg.h" */
+/*****************************************************************************
+ * ac3_exponent.c: ac3 exponent calculations
+ *****************************************************************************
+ * Copyright (C) 1999, 2000 VideoLAN
+ * $Id: ac3_exponent.c,v 1.23 2001/04/20 12:14:34 reno Exp $
+ *
+ * Authors: Michel Kaempf <maxx@via.ecp.fr>
+ * Michel Lespinasse <walken@zoy.org>
+ * Aaron Holtzman <aholtzma@engr.uvic.ca>
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+#include "defs.h"
+
+#include <string.h> /* memcpy(), memset() */
+
+#include "config.h"
+#include "common.h"
+#include "threads.h"
+#include "mtime.h"
+
+#include "stream_control.h"
+#include "input_ext-dec.h"
+
+#include "audio_output.h"
-#include "int_types.h"
#include "ac3_decoder.h"
-#include "ac3_bit_stream.h"
+#include "ac3_decoder_thread.h"
+
+#include "intf_msg.h"
+
#include "ac3_internal.h"
static const s16 exps_1[128] =
- { -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
+{
+ -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 0, 0, 0 };
+ 0, 0, 0
+};
static const s16 exps_2[128] =
- { -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
+{
-2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
-2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
-2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
-2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
- 0, 0, 0 };
+ -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
+ 0, 0, 0
+};
static const s16 exps_3[128] =
- { -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,
+{
-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,
-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,
-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,
-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,
- 0, 0, 0 };
+ -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,
+ 0, 0, 0
+};
#define UNPACK_FBW 1
#define UNPACK_CPL 2
#define UNPACK_LFE 4
static __inline__ int exp_unpack_ch (ac3dec_t * p_ac3dec, u16 type,
- u16 expstr, u16 ngrps, u16 initial_exp,
- u16 exps[], u16 * dest)
+ u16 expstr, u16 ngrps, u16 initial_exp,
+ u16 exps[], u16 * dest)
{
u16 i,j;
s16 exp_acc;
- if (expstr == EXP_REUSE) {
+ if (expstr == EXP_REUSE)
+ {
return 0;
}
/* In the case of a fbw channel then the initial absolute values is
* also an exponent */
- if (type != UNPACK_CPL) {
+ if (type != UNPACK_CPL)
+ {
dest[j++] = exp_acc;
}
/* Loop through the groups and fill the dest array appropriately */
- switch (expstr) {
- case EXP_D15: /* 1 */
- for (i = 0; i < ngrps; i++) {
- if (exps[i] > 124) {
- fprintf (stderr, "ac3dec debug: invalid exponent\n");
- return 1;
- }
- exp_acc += (exps_1[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- exp_acc += (exps_2[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- exp_acc += (exps_3[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- }
- break;
-
- case EXP_D25: /* 2 */
- for (i = 0; i < ngrps; i++) {
- if (exps[i] > 124) {
- fprintf (stderr, "ac3dec debug: invalid exponent\n");
- return 1;
- }
- exp_acc += (exps_1[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- exp_acc += (exps_2[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- exp_acc += (exps_3[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- }
- break;
-
- case EXP_D45: /* 3 */
- for (i = 0; i < ngrps; i++) {
- if (exps[i] > 124) {
- fprintf (stderr, "ac3dec debug: invalid exponent\n");
- return 1;
- }
- exp_acc += (exps_1[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- exp_acc += (exps_2[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- exp_acc += (exps_3[exps[i]] /*- 2*/);
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- dest[j++] = exp_acc;
- }
- break;
+ switch (expstr)
+ {
+ case EXP_D15: /* 1 */
+ for (i = 0; i < ngrps; i++)
+ {
+ if (exps[i] > 124)
+ {
+ intf_ErrMsg ( "ac3dec error: invalid exponent" );
+ return 1;
+ }
+ exp_acc += (exps_1[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ exp_acc += (exps_2[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ exp_acc += (exps_3[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ }
+ break;
+
+ case EXP_D25: /* 2 */
+ for (i = 0; i < ngrps; i++)
+ {
+ if (exps[i] > 124)
+ {
+ intf_ErrMsg ( "ac3dec error: invalid exponent" );
+ return 1;
+ }
+ exp_acc += (exps_1[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ exp_acc += (exps_2[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ exp_acc += (exps_3[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ }
+ break;
+
+ case EXP_D45: /* 3 */
+ for (i = 0; i < ngrps; i++)
+ {
+ if (exps[i] > 124)
+ {
+ intf_ErrMsg ( "ac3dec error: invalid exponent" );
+ return 1;
+ }
+ exp_acc += (exps_1[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ exp_acc += (exps_2[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ exp_acc += (exps_3[exps[i]] /*- 2*/);
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ dest[j++] = exp_acc;
+ }
+ break;
}
return 0;
{
u16 i;
- for (i = 0; i < p_ac3dec->bsi.nfchans; i++) {
- if (exp_unpack_ch (p_ac3dec, UNPACK_FBW, p_ac3dec->audblk.chexpstr[i],
- p_ac3dec->audblk.nchgrps[i],
- p_ac3dec->audblk.exps[i][0],
- &p_ac3dec->audblk.exps[i][1],
- p_ac3dec->audblk.fbw_exp[i]))
- return 1;
+ for (i = 0; i < p_ac3dec->bsi.nfchans; i++)
+ {
+ if (exp_unpack_ch (p_ac3dec, UNPACK_FBW, p_ac3dec->audblk.chexpstr[i],
+ p_ac3dec->audblk.nchgrps[i],
+ p_ac3dec->audblk.exps[i][0],
+ &p_ac3dec->audblk.exps[i][1],
+ p_ac3dec->audblk.fbw_exp[i]))
+ {
+ return 1;
+ }
}
- if (p_ac3dec->audblk.cplinu) {
+ if (p_ac3dec->audblk.cplinu)
+ {
if (exp_unpack_ch (p_ac3dec, UNPACK_CPL, p_ac3dec->audblk.cplexpstr,
- p_ac3dec->audblk.ncplgrps,
- p_ac3dec->audblk.cplabsexp << 1,
- p_ac3dec->audblk.cplexps,
- &p_ac3dec->audblk.cpl_exp[p_ac3dec->audblk.cplstrtmant]))
- return 1;
+ p_ac3dec->audblk.ncplgrps,
+ p_ac3dec->audblk.cplabsexp << 1,
+ p_ac3dec->audblk.cplexps,
+ &p_ac3dec->audblk.cpl_exp[p_ac3dec->audblk.cplstrtmant]))
+ {
+ return 1;
+ }
}
- if (p_ac3dec->bsi.lfeon) {
+ if (p_ac3dec->bsi.lfeon)
+ {
if (exp_unpack_ch (p_ac3dec, UNPACK_LFE, p_ac3dec->audblk.lfeexpstr,
- 2, p_ac3dec->audblk.lfeexps[0],
- &p_ac3dec->audblk.lfeexps[1],
- p_ac3dec->audblk.lfe_exp))
- return 1;
+ 2, p_ac3dec->audblk.lfeexps[0],
+ &p_ac3dec->audblk.lfeexps[1],
+ p_ac3dec->audblk.lfe_exp))
+ {
+ return 1;
+ }
}
return 0;
}
+
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