diff --git a/codecs/mp3/src/cup.c b/codecs/mp3/src/cup.c
new file mode 100755
index 0000000000000000000000000000000000000000..34659f15b0ce07427404381a6ebb1fa3c0702020
--- /dev/null
+++ b/codecs/mp3/src/cup.c
@@ -0,0 +1,500 @@
+/*____________________________________________________________________________
+
+ 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.
+
+ $Id$
+____________________________________________________________________________*/
+
+/**** cup.c ***************************************************
+
+MPEG audio decoder Layer I/II mpeg1 and mpeg2
+should be portable ANSI C, should be endian independent
+
+
+mod 2/21/95 2/21/95 add bit skip, sb limiting
+
+mods 11/15/95 for Layer I
+
+******************************************************************/
+/******************************************************************
+
+ MPEG audio software decoder portable ANSI c.
+ Decodes all Layer I/II to 16 bit linear pcm.
+ Optional stereo to mono conversion. Optional
+ output sample rate conversion to half or quarter of
+ native mpeg rate. dec8.c adds oupuut conversion features.
+
+-------------------------------------
+int audio_decode_init(MPEG *m, MPEG_HEAD *h, int framebytes_arg,
+ int reduction_code, int transform_code, int convert_code,
+ int freq_limit)
+
+initilize decoder:
+ return 0 = fail, not 0 = success
+
+MPEG *m input, mpeg structure for multiple streams
+MPEG_HEAD *h input, mpeg header info (returned by call to head_info)
+framebytes input, mpeg frame size (returned by call to head_info)
+reduction_code input, sample rate reduction code
+ 0 = full rate
+ 1 = half rate
+ 2 = quarter rate
+
+transform_code input, ignored
+convert_code input, channel conversion
+ convert_code: 0 = two chan output
+ 1 = convert two chan to mono
+ 2 = convert two chan to left chan
+ 3 = convert two chan to right chan
+freq_limit input, limits bandwidth of pcm output to specified
+ frequency. Special use. Set to 24000 for normal use.
+
+
+---------------------------------
+void audio_decode_info( MPEG *m, DEC_INFO *info)
+
+MPEG *m input, mpeg structure for multiple streams
+information return:
+ Call after audio_decode_init. See mhead.h for
+ information returned in DEC_INFO structure.
+
+
+---------------------------------
+IN_OUT audio_decode(unsigned char *bs, void *pcmbuf)
+
+decode one mpeg audio frame:
+bs input, mpeg bitstream, must start with
+ sync word. Caution: may read up to 3 bytes
+ beyond end of frame.
+pcmbuf output, pcm samples.
+
+IN_OUT structure returns:
+ Number bytes conceptually removed from mpeg bitstream.
+ Returns 0 if sync loss.
+ Number bytes of pcm output.
+
+*******************************************************************/
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <float.h>
+#include <math.h>
+#include "L3.h"
+#include "mhead.h" /* mpeg header structure */
+
+
+#ifdef _MSC_VER
+#pragma warning(disable: 4709)
+#endif
+
+
+/*-------------------------------------------------------
+NOTE: Decoder may read up to three bytes beyond end of
+frame. Calling application must ensure that this does
+not cause a memory access violation (protection fault)
+---------------------------------------------------------*/
+
+/*====================================================================*/
+/*----------------*/
+
+/* Read Only */
+static int look_joint[16] =
+{ /* lookup stereo sb's by mode+ext */
+ 64, 64, 64, 64, /* stereo */
+ 2 * 4, 2 * 8, 2 * 12, 2 * 16, /* joint */
+ 64, 64, 64, 64, /* dual */
+ 32, 32, 32, 32, /* mono */
+}; /* Okay to be global */
+
+/* Read Only */
+static int bat_bit_master[] =
+{
+ 0, 5, 7, 9, 10, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48};
+
+
+void sbt_mono(MPEG *m, float *sample, short *pcm, int n);
+void sbt_dual(MPEG *m, float *sample, short *pcm, int n);
+
+
+IN_OUT L2audio_decode(void *mv, unsigned char *bs, signed short *pcm);
+
+/*======================================================================*/
+/*======================================================================*/
+
+/*------------- initialize bit getter -------------*/
+static void load_init(MPEG *m, unsigned char *buf)
+{
+ m->cup.bs_ptr = buf;
+ m->cup.bits = 0;
+ m->cup.bitbuf = 0;
+}
+/*------------- get n bits from bitstream -------------*/
+static long load(MPEG *m, int n)
+{
+ unsigned long x;
+
+ if (m->cup.bits < n)
+ { /* refill bit buf if necessary */
+ while (m->cup.bits <= 24)
+ {
+ m->cup.bitbuf = (m->cup.bitbuf << 8) | *m->cup.bs_ptr++;
+ m->cup.bits += 8;
+ }
+ }
+ m->cup.bits -= n;
+ x = m->cup.bitbuf >> m->cup.bits;
+ m->cup.bitbuf -= x << m->cup.bits;
+ return x;
+}
+/*------------- skip over n bits in bitstream -------------*/
+static void skip(MPEG *m, int n)
+{
+ int k;
+
+ if (m->cup.bits < n)
+ {
+ n -= m->cup.bits;
+ k = n >> 3;
+/*--- bytes = n/8 --*/
+ m->cup.bs_ptr += k;
+ n -= k << 3;
+ m->cup.bitbuf = *m->cup.bs_ptr++;
+ m->cup.bits = 8;
+ }
+ m->cup.bits -= n;
+ m->cup.bitbuf -= (m->cup.bitbuf >> m->cup.bits) << m->cup.bits;
+}
+/*--------------------------------------------------------------*/
+#define mac_load_check(n) if( m->cup.bits < (n) ) { \
+ while( m->cup.bits <= 24 ) { \
+ m->cup.bitbuf = (m->cup.bitbuf << 8) | *m->cup.bs_ptr++; \
+ m->cup.bits += 8; \
+ } \
+ }
+/*--------------------------------------------------------------*/
+#define mac_load(n) ( m->cup.bits -= n, \
+ m->cup.bitval = m->cup.bitbuf >> m->cup.bits, \
+ m->cup.bitbuf -= m->cup.bitval << m->cup.bits, \
+ m->cup.bitval )
+/*======================================================================*/
+static void unpack_ba(MPEG *m)
+{
+ int i, j, k;
+ /* Read Only */
+ static int nbit[4] =
+ {4, 4, 3, 2};
+ int nstereo;
+
+ m->cup.bit_skip = 0;
+ nstereo = m->cup.stereo_sb;
+ k = 0;
+ for (i = 0; i < 4; i++)
+ {
+ for (j = 0; j < m->cup.nbat[i]; j++, k++)
+ {
+ mac_load_check(4);
+ m->cup.ballo[k] = m->cup.samp_dispatch[k] = m->cup.bat[i][mac_load(nbit[i])];
+ if (k >= m->cup.nsb_limit)
+ m->cup.bit_skip += bat_bit_master[m->cup.samp_dispatch[k]];
+ m->cup.c_value[k] = m->cup.look_c_value[m->cup.samp_dispatch[k]];
+ if (--nstereo < 0)
+ {
+ m->cup.ballo[k + 1] = m->cup.ballo[k];
+ m->cup.samp_dispatch[k] += 18; /* flag as joint */
+ m->cup.samp_dispatch[k + 1] = m->cup.samp_dispatch[k]; /* flag for sf */
+ m->cup.c_value[k + 1] = m->cup.c_value[k];
+ k++;
+ j++;
+ }
+ }
+ }
+ m->cup.samp_dispatch[m->cup.nsb_limit] = 37; /* terminate the dispatcher with skip */
+ m->cup.samp_dispatch[k] = 36; /* terminate the dispatcher */
+
+}
+/*-------------------------------------------------------------------------*/
+static void unpack_sfs(MPEG *m) /* unpack scale factor selectors */
+{
+ int i;
+ for (i = 0; i < m->cup.max_sb; i++)
+ {
+ mac_load_check(2);
+ if (m->cup.ballo[i])
+ m->cup.sf_dispatch[i] = mac_load(2);
+ else
+ m->cup.sf_dispatch[i] = 4; /* no allo */
+ }
+ m->cup.sf_dispatch[i] = 5; /* terminate dispatcher */
+}
+/*-------------------------------------------------------------------------*/
+static void unpack_sf(MPEG *m) /* unpack scale factor */
+{ /* combine dequant and scale factors */
+ int i;
+
+ i = -1;
+ dispatch:switch (m->cup.sf_dispatch[++i])
+ {
+ case 0: /* 3 factors 012 */
+ mac_load_check(18);
+ m->cup.cs_factor[0][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ m->cup.cs_factor[1][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ m->cup.cs_factor[2][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ goto dispatch;
+ case 1: /* 2 factors 002 */
+ mac_load_check(12);
+ m->cup.cs_factor[1][i] = m->cup.cs_factor[0][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ m->cup.cs_factor[2][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ goto dispatch;
+ case 2: /* 1 factor 000 */
+ mac_load_check(6);
+ m->cup.cs_factor[2][i] = m->cup.cs_factor[1][i] = m->cup.cs_factor[0][i] =
+ m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ goto dispatch;
+ case 3: /* 2 factors 022 */
+ mac_load_check(12);
+ m->cup.cs_factor[0][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ m->cup.cs_factor[2][i] = m->cup.cs_factor[1][i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ goto dispatch;
+ case 4: /* no allo */
+/*-- m->cup.cs_factor[2][i] = m->cup.cs_factor[1][i] = m->cup.cs_factor[0][i] = 0.0; --*/
+ goto dispatch;
+ case 5: /* all done */
+ ;
+ } /* end switch */
+}
+/*-------------------------------------------------------------------------*/
+#define UNPACK_N(n) s[k] = m->cup.cs_factor[i][k]*(load(m,n)-((1 << (n-1)) -1)); \
+ s[k+64] = m->cup.cs_factor[i][k]*(load(m,n)-((1 << (n-1)) -1)); \
+ s[k+128] = m->cup.cs_factor[i][k]*(load(m,n)-((1 << (n-1)) -1)); \
+ goto dispatch;
+#define UNPACK_N2(n) mac_load_check(3*n); \
+ s[k] = m->cup.cs_factor[i][k]*(mac_load(n)-((1 << (n-1)) -1)); \
+ s[k+64] = m->cup.cs_factor[i][k]*(mac_load(n)-((1 << (n-1)) -1)); \
+ s[k+128] = m->cup.cs_factor[i][k]*(mac_load(n)-((1 << (n-1)) -1)); \
+ goto dispatch;
+#define UNPACK_N3(n) mac_load_check(2*n); \
+ s[k] = m->cup.cs_factor[i][k]*(mac_load(n)-((1 << (n-1)) -1)); \
+ s[k+64] = m->cup.cs_factor[i][k]*(mac_load(n)-((1 << (n-1)) -1)); \
+ mac_load_check(n); \
+ s[k+128] = m->cup.cs_factor[i][k]*(mac_load(n)-((1 << (n-1)) -1)); \
+ goto dispatch;
+#define UNPACKJ_N(n) tmp = (load(m,n)-((1 << (n-1)) -1)); \
+ s[k] = m->cup.cs_factor[i][k]*tmp; \
+ s[k+1] = m->cup.cs_factor[i][k+1]*tmp; \
+ tmp = (load(m,n)-((1 << (n-1)) -1)); \
+ s[k+64] = m->cup.cs_factor[i][k]*tmp; \
+ s[k+64+1] = m->cup.cs_factor[i][k+1]*tmp; \
+ tmp = (load(m,n)-((1 << (n-1)) -1)); \
+ s[k+128] = m->cup.cs_factor[i][k]*tmp; \
+ s[k+128+1] = m->cup.cs_factor[i][k+1]*tmp; \
+ k++; /* skip right chan dispatch */ \
+ goto dispatch;
+/*-------------------------------------------------------------------------*/
+static void unpack_samp(MPEG *m) /* unpack samples */
+{
+ int i, j, k;
+ float *s;
+ int n;
+ long tmp;
+
+ s = m->cup.sample;
+ for (i = 0; i < 3; i++)
+ { /* 3 groups of scale factors */
+ for (j = 0; j < 4; j++)
+ {
+ k = -1;
+ dispatch:switch (m->cup.samp_dispatch[++k])
+ {
+ case 0:
+ s[k + 128] = s[k + 64] = s[k] = 0.0F;
+ goto dispatch;
+ case 1: /* 3 levels grouped 5 bits */
+ mac_load_check(5);
+ n = mac_load(5);
+ s[k] = m->cup.cs_factor[i][k] * m->cup.group3_table[n][0];
+ s[k + 64] = m->cup.cs_factor[i][k] * m->cup.group3_table[n][1];
+ s[k + 128] = m->cup.cs_factor[i][k] * m->cup.group3_table[n][2];
+ goto dispatch;
+ case 2: /* 5 levels grouped 7 bits */
+ mac_load_check(7);
+ n = mac_load(7);
+ s[k] = m->cup.cs_factor[i][k] * m->cup.group5_table[n][0];
+ s[k + 64] = m->cup.cs_factor[i][k] * m->cup.group5_table[n][1];
+ s[k + 128] = m->cup.cs_factor[i][k] * m->cup.group5_table[n][2];
+ goto dispatch;
+ case 3:
+ UNPACK_N2(3) /* 7 levels */
+ case 4: /* 9 levels grouped 10 bits */
+ mac_load_check(10);
+ n = mac_load(10);
+ s[k] = m->cup.cs_factor[i][k] * m->cup.group9_table[n][0];
+ s[k + 64] = m->cup.cs_factor[i][k] * m->cup.group9_table[n][1];
+ s[k + 128] = m->cup.cs_factor[i][k] * m->cup.group9_table[n][2];
+ goto dispatch;
+ case 5:
+ UNPACK_N2(4) /* 15 levels */
+ case 6:
+ UNPACK_N2(5) /* 31 levels */
+ case 7:
+ UNPACK_N2(6) /* 63 levels */
+ case 8:
+ UNPACK_N2(7) /* 127 levels */
+ case 9:
+ UNPACK_N2(8) /* 255 levels */
+ case 10:
+ UNPACK_N3(9) /* 511 levels */
+ case 11:
+ UNPACK_N3(10) /* 1023 levels */
+ case 12:
+ UNPACK_N3(11) /* 2047 levels */
+ case 13:
+ UNPACK_N3(12) /* 4095 levels */
+ case 14:
+ UNPACK_N(13) /* 8191 levels */
+ case 15:
+ UNPACK_N(14) /* 16383 levels */
+ case 16:
+ UNPACK_N(15) /* 32767 levels */
+ case 17:
+ UNPACK_N(16) /* 65535 levels */
+/* -- joint ---- */
+ case 18 + 0:
+ s[k + 128 + 1] = s[k + 128] = s[k + 64 + 1] = s[k + 64] = s[k + 1] = s[k] = 0.0F;
+ k++; /* skip right chan dispatch */
+ goto dispatch;
+ case 18 + 1: /* 3 levels grouped 5 bits */
+ n = load(m,5);
+ s[k] = m->cup.cs_factor[i][k] * m->cup.group3_table[n][0];
+ s[k + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group3_table[n][0];
+ s[k + 64] = m->cup.cs_factor[i][k] * m->cup.group3_table[n][1];
+ s[k + 64 + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group3_table[n][1];
+ s[k + 128] = m->cup.cs_factor[i][k] * m->cup.group3_table[n][2];
+ s[k + 128 + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group3_table[n][2];
+ k++; /* skip right chan dispatch */
+ goto dispatch;
+ case 18 + 2: /* 5 levels grouped 7 bits */
+ n = load(m,7);
+ s[k] = m->cup.cs_factor[i][k] * m->cup.group5_table[n][0];
+ s[k + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group5_table[n][0];
+ s[k + 64] = m->cup.cs_factor[i][k] * m->cup.group5_table[n][1];
+ s[k + 64 + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group5_table[n][1];
+ s[k + 128] = m->cup.cs_factor[i][k] * m->cup.group5_table[n][2];
+ s[k + 128 + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group5_table[n][2];
+ k++; /* skip right chan dispatch */
+ goto dispatch;
+ case 18 + 3:
+ UNPACKJ_N(3) /* 7 levels */
+ case 18 + 4: /* 9 levels grouped 10 bits */
+ n = load(m,10);
+ s[k] = m->cup.cs_factor[i][k] * m->cup.group9_table[n][0];
+ s[k + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group9_table[n][0];
+ s[k + 64] = m->cup.cs_factor[i][k] * m->cup.group9_table[n][1];
+ s[k + 64 + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group9_table[n][1];
+ s[k + 128] = m->cup.cs_factor[i][k] * m->cup.group9_table[n][2];
+ s[k + 128 + 1] = m->cup.cs_factor[i][k + 1] * m->cup.group9_table[n][2];
+ k++; /* skip right chan dispatch */
+ goto dispatch;
+ case 18 + 5:
+ UNPACKJ_N(4) /* 15 levels */
+ case 18 + 6:
+ UNPACKJ_N(5) /* 31 levels */
+ case 18 + 7:
+ UNPACKJ_N(6) /* 63 levels */
+ case 18 + 8:
+ UNPACKJ_N(7) /* 127 levels */
+ case 18 + 9:
+ UNPACKJ_N(8) /* 255 levels */
+ case 18 + 10:
+ UNPACKJ_N(9) /* 511 levels */
+ case 18 + 11:
+ UNPACKJ_N(10) /* 1023 levels */
+ case 18 + 12:
+ UNPACKJ_N(11) /* 2047 levels */
+ case 18 + 13:
+ UNPACKJ_N(12) /* 4095 levels */
+ case 18 + 14:
+ UNPACKJ_N(13) /* 8191 levels */
+ case 18 + 15:
+ UNPACKJ_N(14) /* 16383 levels */
+ case 18 + 16:
+ UNPACKJ_N(15) /* 32767 levels */
+ case 18 + 17:
+ UNPACKJ_N(16) /* 65535 levels */
+/* -- end of dispatch -- */
+ case 37:
+ skip(m, m->cup.bit_skip);
+ case 36:
+ s += 3 * 64;
+ } /* end switch */
+ } /* end j loop */
+ } /* end i loop */
+
+
+}
+/*-------------------------------------------------------------------------*/
+IN_OUT audio_decode(MPEG *m, unsigned char *bs, signed short *pcm)
+{
+ return m->cup.audio_decode_routine(m, bs, pcm);
+}
+/*-------------------------------------------------------------------------*/
+IN_OUT L2audio_decode(void *mv, unsigned char *bs, signed short *pcm)
+{
+ MPEG *m = mv;
+ int sync, prot;
+ IN_OUT in_out;
+
+ load_init(m, bs); /* initialize bit getter */
+/* test sync */
+ in_out.in_bytes = 0; /* assume fail */
+ in_out.out_bytes = 0;
+ sync = load(m,12);
+ if (sync != 0xFFF)
+ return in_out; /* sync fail */
+
+ load(m,3); /* skip id and option (checked by init) */
+ prot = load(m,1); /* load prot bit */
+ load(m,6); /* skip to pad */
+ m->cup.pad = load(m,1);
+ load(m,1); /* skip to mode */
+ m->cup.stereo_sb = look_joint[load(m,4)];
+ if (prot)
+ load(m,4); /* skip to data */
+ else
+ load(m,20); /* skip crc */
+
+ unpack_ba(m); /* unpack bit allocation */
+ unpack_sfs(m); /* unpack scale factor selectors */
+ unpack_sf(m); /* unpack scale factor */
+ unpack_samp(m); /* unpack samples */
+
+ m->cup.sbt(m, m->cup.sample, pcm, 36);
+/*-----------*/
+ in_out.in_bytes = m->cup.framebytes + m->cup.pad;
+ in_out.out_bytes = m->cup.outbytes;
+
+ return in_out;
+}
+/*-------------------------------------------------------------------------*/
+#include "cupini.c" /* initialization */
+#include "cupL1.c" /* Layer I */
+/*-------------------------------------------------------------------------*/
diff --git a/codecs/mp3/src/cupL1.c b/codecs/mp3/src/cupL1.c
new file mode 100755
index 0000000000000000000000000000000000000000..84b46d24d645819e217a52a1de91880148170edf
--- /dev/null
+++ b/codecs/mp3/src/cupL1.c
@@ -0,0 +1,319 @@
+/*____________________________________________________________________________
+
+ 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.
+
+ $Id$
+____________________________________________________________________________*/
+
+/**** cupL1.c ***************************************************
+
+MPEG audio decoder Layer I mpeg1 and mpeg2
+
+include to clup.c
+
+
+******************************************************************/
+/*======================================================================*/
+
+
+/* Read Only */
+static int bat_bit_masterL1[] =
+{
+ 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+
+/*======================================================================*/
+static void unpack_baL1(MPEG *m)
+{
+ int j;
+ int nstereo;
+
+ m->cup.bit_skip = 0;
+ nstereo = m->cup.stereo_sb;
+
+ for (j = 0; j < m->cup.nbatL1; j++)
+ {
+ mac_load_check(4);
+ m->cup.ballo[j] = m->cup.samp_dispatch[j] = mac_load(4);
+ if (j >= m->cup.nsb_limit)
+ m->cup.bit_skip += bat_bit_masterL1[m->cup.samp_dispatch[j]];
+ m->cup.c_value[j] = m->cup.look_c_valueL1[m->cup.samp_dispatch[j]];
+ if (--nstereo < 0)
+ {
+ m->cup.ballo[j + 1] = m->cup.ballo[j];
+ m->cup.samp_dispatch[j] += 15; /* flag as joint */
+ m->cup.samp_dispatch[j + 1] = m->cup.samp_dispatch[j]; /* flag for sf */
+ m->cup.c_value[j + 1] = m->cup.c_value[j];
+ j++;
+ }
+ }
+/*-- terminate with bit skip and end --*/
+ m->cup.samp_dispatch[m->cup.nsb_limit] = 31;
+ m->cup.samp_dispatch[j] = 30;
+}
+/*-------------------------------------------------------------------------*/
+static void unpack_sfL1(MPEG *m) /* unpack scale factor */
+{ /* combine dequant and scale factors */
+ int i;
+
+ for (i = 0; i < m->cup.nbatL1; i++)
+ {
+ if (m->cup.ballo[i])
+ {
+ mac_load_check(6);
+ m->cup.cs_factorL1[i] = m->cup.c_value[i] * m->cup.sf_table[mac_load(6)];
+ }
+ }
+/*-- done --*/
+}
+/*-------------------------------------------------------------------------*/
+#define UNPACKL1_N(n) s[k] = m->cup.cs_factorL1[k]*(load(m,n)-((1 << (n-1)) -1)); \
+ goto dispatch;
+#define UNPACKL1J_N(n) tmp = (load(m,n)-((1 << (n-1)) -1)); \
+ s[k] = m->cup.cs_factorL1[k]*tmp; \
+ s[k+1] = m->cup.cs_factorL1[k+1]*tmp; \
+ k++; \
+ goto dispatch;
+/*-------------------------------------------------------------------------*/
+static void unpack_sampL1(MPEG *m) /* unpack samples */
+{
+ int j, k;
+ float *s;
+ long tmp;
+
+ s = m->cup.sample;
+ for (j = 0; j < 12; j++)
+ {
+ k = -1;
+ dispatch:switch (m->cup.samp_dispatch[++k])
+ {
+ case 0:
+ s[k] = 0.0F;
+ goto dispatch;
+ case 1:
+ UNPACKL1_N(2) /* 3 levels */
+ case 2:
+ UNPACKL1_N(3) /* 7 levels */
+ case 3:
+ UNPACKL1_N(4) /* 15 levels */
+ case 4:
+ UNPACKL1_N(5) /* 31 levels */
+ case 5:
+ UNPACKL1_N(6) /* 63 levels */
+ case 6:
+ UNPACKL1_N(7) /* 127 levels */
+ case 7:
+ UNPACKL1_N(8) /* 255 levels */
+ case 8:
+ UNPACKL1_N(9) /* 511 levels */
+ case 9:
+ UNPACKL1_N(10) /* 1023 levels */
+ case 10:
+ UNPACKL1_N(11) /* 2047 levels */
+ case 11:
+ UNPACKL1_N(12) /* 4095 levels */
+ case 12:
+ UNPACKL1_N(13) /* 8191 levels */
+ case 13:
+ UNPACKL1_N(14) /* 16383 levels */
+ case 14:
+ UNPACKL1_N(15) /* 32767 levels */
+/* -- joint ---- */
+ case 15 + 0:
+ s[k + 1] = s[k] = 0.0F;
+ k++; /* skip right chan dispatch */
+ goto dispatch;
+/* -- joint ---- */
+ case 15 + 1:
+ UNPACKL1J_N(2) /* 3 levels */
+ case 15 + 2:
+ UNPACKL1J_N(3) /* 7 levels */
+ case 15 + 3:
+ UNPACKL1J_N(4) /* 15 levels */
+ case 15 + 4:
+ UNPACKL1J_N(5) /* 31 levels */
+ case 15 + 5:
+ UNPACKL1J_N(6) /* 63 levels */
+ case 15 + 6:
+ UNPACKL1J_N(7) /* 127 levels */
+ case 15 + 7:
+ UNPACKL1J_N(8) /* 255 levels */
+ case 15 + 8:
+ UNPACKL1J_N(9) /* 511 levels */
+ case 15 + 9:
+ UNPACKL1J_N(10) /* 1023 levels */
+ case 15 + 10:
+ UNPACKL1J_N(11) /* 2047 levels */
+ case 15 + 11:
+ UNPACKL1J_N(12) /* 4095 levels */
+ case 15 + 12:
+ UNPACKL1J_N(13) /* 8191 levels */
+ case 15 + 13:
+ UNPACKL1J_N(14) /* 16383 levels */
+ case 15 + 14:
+ UNPACKL1J_N(15) /* 32767 levels */
+
+/* -- end of dispatch -- */
+ case 31:
+ skip(m,m->cup.bit_skip);
+ case 30:
+ s += 64;
+ } /* end switch */
+ } /* end j loop */
+
+/*-- done --*/
+}
+/*-------------------------------------------------------------------*/
+IN_OUT L1audio_decode(void *mv, unsigned char *bs, signed short *pcm)
+{
+ MPEG *m = mv;
+ int sync, prot;
+ IN_OUT in_out;
+
+ load_init(m, bs); /* initialize bit getter */
+/* test sync */
+ in_out.in_bytes = 0; /* assume fail */
+ in_out.out_bytes = 0;
+ sync = load(m,12);
+ if (sync != 0xFFF)
+ return in_out; /* sync fail */
+
+
+ load(m,3); /* skip id and option (checked by init) */
+ prot = load(m,1); /* load prot bit */
+ load(m,6); /* skip to pad */
+ m->cup.pad = (load(m,1)) << 2;
+ load(m,1); /* skip to mode */
+ m->cup.stereo_sb = look_joint[load(m,4)];
+ if (prot)
+ load(m,4); /* skip to data */
+ else
+ load(m,20); /* skip crc */
+
+ unpack_baL1(m); /* unpack bit allocation */
+ unpack_sfL1(m); /* unpack scale factor */
+ unpack_sampL1(m); /* unpack samples */
+
+ m->cup.sbt(m, m->cup.sample, pcm, 12);
+/*-----------*/
+ in_out.in_bytes = m->cup.framebytes + m->cup.pad;
+ in_out.out_bytes = m->cup.outbytes;
+
+ return in_out;
+}
+/*-------------------------------------------------------------------------*/
+int L1audio_decode_init(MPEG *m, MPEG_HEAD * h, int framebytes_arg,
+ int reduction_code, int transform_code, int convert_code,
+ int freq_limit)
+{
+ int i, k;
+ long samprate;
+ int limit;
+ long step;
+ int bit_code;
+
+/*--- sf init done by layer II init ---*/
+ if (m->cup.first_pass_L1)
+ {
+ for (step = 4, i = 1; i < 16; i++, step <<= 1)
+ m->cup.look_c_valueL1[i] = (float) (2.0 / (step - 1));
+ m->cup.first_pass_L1 = 0;
+ }
+
+ transform_code = transform_code; /* not used, asm compatability */
+
+ bit_code = 0;
+ if (convert_code & 8)
+ bit_code = 1;
+ convert_code = convert_code & 3; /* higher bits used by dec8 freq cvt */
+ if (reduction_code < 0)
+ reduction_code = 0;
+ if (reduction_code > 2)
+ reduction_code = 2;
+ if (freq_limit < 1000)
+ freq_limit = 1000;
+
+
+ m->cup.framebytes = framebytes_arg;
+/* check if code handles */
+ if (h->option != 3)
+ return 0; /* layer I only */
+
+ m->cup.nbatL1 = 32;
+ m->cup.max_sb = m->cup.nbatL1;
+/*----- compute nsb_limit --------*/
+ samprate = sr_table[4 * h->id + h->sr_index];
+ m->cup.nsb_limit = (freq_limit * 64L + samprate / 2) / samprate;
+/*- caller limit -*/
+/*---- limit = 0.94*(32>>reduction_code); ----*/
+ limit = (32 >> reduction_code);
+ if (limit > 8)
+ limit--;
+ if (m->cup.nsb_limit > limit)
+ m->cup.nsb_limit = limit;
+ if (m->cup.nsb_limit > m->cup.max_sb)
+ m->cup.nsb_limit = m->cup.max_sb;
+
+ m->cup.outvalues = 384 >> reduction_code;
+ if (h->mode != 3)
+ { /* adjust for 2 channel modes */
+ m->cup.nbatL1 *= 2;
+ m->cup.max_sb *= 2;
+ m->cup.nsb_limit *= 2;
+ }
+
+/* set sbt function */
+ k = 1 + convert_code;
+ if (h->mode == 3)
+ {
+ k = 0;
+ }
+ m->cup.sbt = sbt_table[bit_code][reduction_code][k];
+ m->cup.outvalues *= out_chans[k];
+
+ if (bit_code)
+ m->cup.outbytes = m->cup.outvalues;
+ else
+ m->cup.outbytes = sizeof(short) * m->cup.outvalues;
+
+ m->cup.decinfo.channels = out_chans[k];
+ m->cup.decinfo.outvalues = m->cup.outvalues;
+ m->cup.decinfo.samprate = samprate >> reduction_code;
+ if (bit_code)
+ m->cup.decinfo.bits = 8;
+ else
+ m->cup.decinfo.bits = sizeof(short) * 8;
+
+ m->cup.decinfo.framebytes = m->cup.framebytes;
+ m->cup.decinfo.type = 0;
+
+
+/* clear sample buffer, unused sub bands must be 0 */
+ for (i = 0; i < 768; i++)
+ m->cup.sample[i] = 0.0F;
+
+
+/* init sub-band transform */
+ sbt_init();
+
+ return 1;
+}
+/*---------------------------------------------------------*/