-#include <unistd.h> /* getpid() */
+/*****************************************************************************
+ * 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 <stdio.h> /* "intf_msg.h" */
-#include <stdlib.h> /* malloc(), free() */
-#include <sys/soundcard.h> /* "audio_output.h" */
-#include <sys/uio.h> /* "input.h" */
-
-#include "common.h"
#include "config.h"
+#include "common.h"
+#include "threads.h"
#include "mtime.h"
-#include "vlc_thread.h"
-#include "debug.h" /* "input_netlist.h" */
-#include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
-
-#include "input.h" /* pes_packet_t */
-#include "input_netlist.h" /* input_NetlistFreePES() */
-#include "decoder_fifo.h" /* DECODER_FIFO_(ISEMPTY|START|INCSTART)() */
+#include "stream_control.h"
+#include "input_ext-dec.h"
#include "audio_output.h"
#include "ac3_decoder.h"
-#include "ac3_exponent.h"
+#include "ac3_decoder_thread.h"
+
+#include "intf_msg.h"
-static const s16 exps_1[128] = { 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5 };
-static const s16 exps_2[128] = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0, 0, 0 };
-static const s16 exps_3[128] = { 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2 };
+#include "ac3_internal.h"
-static __inline__ void exp_unpack_ch( u16 type, u16 expstr, u16 ngrps, u16 initial_exp, u16 exps[], u16 * dest )
+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,
+ -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
+};
+
+static const s16 exps_2[128] =
{
- u16 i,j;
- s16 exp_acc;
- /*
- s16 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 )
- {
- //FIXME set an error flag and mute the frame
- printf( "\n!! Invalid exponent !!\n" );
- exit( 1 );
- }
- */
-
- /*
- exp_1 = exps[i] / 25;
- exp_2 = (exps[i] - (exp_1 * 25)) / 5;
- exp_3 = exps[i] - (exp_1 * 25) - (exp_2 * 5) ;
- */
-
- switch ( expstr )
- {
- case EXP_D45:
- 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;
-
- case EXP_D25:
- 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_D15:
- 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;
- }
- }
+ -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
+};
+
+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
+};
+
+#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 i,j;
+ s16 exp_acc;
+
+ if (expstr == EXP_REUSE)
+ {
+ return 0;
+ }
+
+ /* 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 */
+ 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;
}
-void exponent_unpack( ac3dec_thread_t * p_ac3dec )
+int exponent_unpack (ac3dec_t * p_ac3dec)
{
- u16 i;
-
- for(i=0; i< p_ac3dec->bsi.nfchans; i++)
- exp_unpack_ch(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]);
-
- if(p_ac3dec->audblk.cplinu)
- exp_unpack_ch(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]);
-
- if(p_ac3dec->bsi.lfeon)
- exp_unpack_ch(UNPACK_LFE, p_ac3dec->audblk.lfeexpstr, 2, p_ac3dec->audblk.lfeexps[0],
- &p_ac3dec->audblk.lfeexps[1], p_ac3dec->audblk.lfe_exp);
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ return 0;
}
+
projects / vlc / blobdiff