rockbox/apps/plugins/mp3_encoder.c

/*  Shine is an MP3 encoder
 *  Copyright (C) 1999-2000  Gabriel Bouvigne
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Library General Public License for more details. */

#include <inttypes.h>
#include "plugin.h"


#define MAX_SAMP_PER_FRAME   1152
#define SAMPL2                576
#define SBLIMIT                32
#define HTN                    16
#define putlong(c, s)  if(s+sz <= 32) { cc = (cc << s) | c;      sz+= s; } \
                       else           { putbits(cc, sz); cc = c; sz = s; }

enum e_byte_order { order_unknown, order_bigEndian, order_littleEndian };

typedef struct {
    int   type; /* 0=(MPEG2 - 22.05,24,16kHz) 1=(MPEG1 - 44.1,48,32kHz) */
    int   mode; /* 0=stereo, 1=jstereo, 2=dual, 3=mono  */
    int   padding;
    long  bitr_id;
    int   smpl_id;
    uint16_t bitrate;
    uint8_t num_bands;
} mpeg_t;

/* Side information */
typedef struct {
    uint32_t part2_3_length;
    int    count1;          /* number of 0-1-quadruples  */
    uint32_t global_gain;
    uint32_t table_select[4];
    uint32_t address1;
    uint32_t address2;
    uint32_t address3;
    long     quantStep;
    long     additStep;
    uint32_t max_val;
    uint8_t  region_0_1;
} side_info_t;

typedef struct {
    enum e_byte_order byte_order;
    side_info_t       cod_info[2][2];
    mpeg_t            mpg;
    long              frac_per_frame;
    long              byte_per_frame;
    long              slot_lag;
    int               sideinfo_len;
    int               mean_bits;
    int               ResvSize;
    int               channels;
    int               granules;
    int               smpl_per_frm;
    uint16_t          samplerate;
} config_t;

typedef struct {
    int       bitpos;   /* current bitpos for writing */
    uint32_t  bbuf[263];
} BF_Data;

struct huffcodetab {
  const uint8_t        len;   /* max. index                  */
  const uint8_t const *table; /* pointer to array[len][len]  */
  const uint8_t const *hlen;  /* pointer to array[len][len]  */
};

struct huffcodebig {
  const uint8_t len;     /* max. index                   */
  const uint8_t linbits; /* number of linbits            */
  const uint16_t linmax;  /* max number stored in linbits */
};

#define shft4(x)    ((x +     8) >>  4)
#define shft9(x)    ((x +   256) >>  9)
#define shft13(x)   ((x +  4096) >> 13)
#define shft15(x)   ((x + 16384) >> 15)
#define shft16(x)   ((x + 32768) >> 16)
#define shft_n(x,n) ((x) >> n)
#define SQRT        724 /* sqrt(2) * 512 */

static short     mfbuf       [2*(1152+512)]      IBSS_ATTR; /*  6656 Bytes */
static int       sb_data     [2][2][18][SBLIMIT] IBSS_ATTR; /*  9216 Bytes */
static int       mdct_freq   [SAMPL2]            IBSS_ATTR; /*  2304 Bytes */
static char      mdct_sign   [SAMPL2]            IBSS_ATTR; /*   576 Bytes */
static short     enc_data    [SAMPL2]            IBSS_ATTR; /*  1152 Bytes */
static BF_Data   CodedData                       IBSS_ATTR; /*  1056 Bytes */

static const uint16_t sfBand[6][23]              ICONST_ATTR;
static const uint16_t const *scalefac            IBSS_ATTR;

static const int16_t   ca    [8]                 ICONST_ATTR; /*    16 Bytes */
static const uint16_t  cs    [8]                 ICONST_ATTR; /*    16 Bytes */
static const int16_t   cx    [9]                 ICONST_ATTR; /*    18 Bytes */
static const int16_t   win   [18][4]             ICONST_ATTR; /*   144 Bytes */
static const int16_t   enwindow    [15*27+24]    ICONST_ATTR; /*   862 Bytes */
static const uint16_t  int2idx     [4096]        ICONST_ATTR; /*  8192 Bytes */
static const uint8_t   ht_count[2][2][16]        ICONST_ATTR; /*    64 Bytes */
static const uint32_t  tab01 [ 16]               ICONST_ATTR; /*    64 Bytes */
static const uint32_t  tab23       [  9]         ICONST_ATTR; /*    36 Bytes */
static const uint32_t  tab56       [ 16]         ICONST_ATTR; /*    64 Bytes */
static const uint32_t  tab1315     [256]         ICONST_ATTR; /*  1024 Bytes */
static const uint32_t  tab1624     [256]         ICONST_ATTR; /*  1024 Bytes */
static const uint32_t  tab789      [ 36]         ICONST_ATTR; /*   144 Bytes */
static const uint32_t  tabABC      [ 64]         ICONST_ATTR; /*   256 Bytes */
static const uint8_t   t1HB        [  4]         ICONST_ATTR;
static const uint8_t   t2HB        [  9]         ICONST_ATTR;
static const uint8_t   t3HB        [  9]         ICONST_ATTR;
static const uint8_t   t5HB        [ 16]         ICONST_ATTR;
static const uint8_t   t6HB        [ 16]         ICONST_ATTR;
static const uint8_t   t7HB        [ 36]         ICONST_ATTR;
static const uint8_t   t8HB        [ 36]         ICONST_ATTR;
static const uint8_t   t9HB        [ 36]         ICONST_ATTR;
static const uint8_t   t10HB       [ 64]         ICONST_ATTR;
static const uint8_t   t11HB       [ 64]         ICONST_ATTR;
static const uint8_t   t12HB       [ 64]         ICONST_ATTR;
static const uint8_t   t13HB       [256]         ICONST_ATTR;
static const uint8_t   t15HB       [256]         ICONST_ATTR;
static const uint16_t  t16HB       [256]         ICONST_ATTR;
static const uint16_t  t24HB       [256]         ICONST_ATTR;
static const uint8_t   t1l         [  8]         ICONST_ATTR;
static const uint8_t   t2l         [  9]         ICONST_ATTR;
static const uint8_t   t3l         [  9]         ICONST_ATTR;
static const uint8_t   t5l         [ 16]         ICONST_ATTR;
static const uint8_t   t6l         [ 16]         ICONST_ATTR;
static const uint8_t   t7l         [ 36]         ICONST_ATTR;
static const uint8_t   t8l         [ 36]         ICONST_ATTR;
static const uint8_t   t9l         [ 36]         ICONST_ATTR;
static const uint8_t   t10l        [ 64]         ICONST_ATTR;
static const uint8_t   t11l        [ 64]         ICONST_ATTR;
static const uint8_t   t12l        [ 64]         ICONST_ATTR;
static const uint8_t   t13l        [256]         ICONST_ATTR;
static const uint8_t   t15l        [256]         ICONST_ATTR;
static const uint8_t   t16l        [256]         ICONST_ATTR;
static const uint8_t   t24l        [256]         ICONST_ATTR;
static struct huffcodetab ht [HTN]               IDATA_ATTR;

static const uint8_t ht_count[2][2][16] =
{ { { 1,  5,  4,  5,  6,  5, 4, 4, 7, 3, 6, 0, 7, 2, 3, 1 },     /* table0 */
    { 1,  5,  5,  7,  5,  8, 7, 9, 5, 7, 7, 9, 7, 9, 9,10 } },   /* hleng0 */
  { {15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 },     /* table1 */
    { 4,  5,  5,  6,  5,  6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 } } }; /* hleng1 */

static const uint8_t  t1HB[4]  = {1,1,1,0}; 
static const uint8_t  t2HB[9]  = {1,2,1,3,1,1,3,2,0};
static const uint8_t  t3HB[9]  = {3,2,1,1,1,1,3,2,0};
static const uint8_t  t5HB[16] = {1,2,6,5,3,1,4,4,7,5,7,1,6,1,1,0};
static const uint8_t  t6HB[16] = {7,3,5,1,6,2,3,2,5,4,4,1,3,3,2,0};

static const uint8_t  t7HB[36] =
{  1, 2,10,19,16,10, 3, 3, 7,10, 5, 3,11, 4,13,17, 8, 4,
  12,11,18,15,11, 2, 7, 6, 9,14, 3, 1, 6, 4, 5, 3, 2, 0 };

static const uint8_t  t8HB[36] =
{  3, 4, 6,18,12, 5, 5, 1, 2,16, 9, 3, 7, 3, 5,14, 7, 3,
  19,17,15,13,10, 4,13, 5, 8,11, 5, 1,12, 4, 4, 1, 1, 0 };

static const uint8_t  t9HB[36] =
{  7, 5, 9,14,15, 7, 6, 4, 5, 5, 6, 7, 7, 6, 8, 8, 8, 5,
  15, 6, 9,10, 5, 1,11, 7, 9, 6, 4, 1,14, 4, 6, 2, 6, 0 };

static const uint8_t t10HB[64] =
{1,2,10,23,35,30,12,17,3,3,8,12,18,21,12,7,11,9,15,21,32,
 40,19,6,14,13,22,34,46,23,18,7,20,19,33,47,27,22,9,3,31,22,
 41,26,21,20,5,3,14,13,10,11,16,6,5,1,9,8,7,8,4,4,2,0 };

static const uint8_t t11HB[64] =
{3,4,10,24,34,33,21,15,5,3,4,10,32,17,11,10,11,7,13,18,30,
 31,20,5,25,11,19,59,27,18,12,5,35,33,31,58,30,16,7,5,28,26,
 32,19,17,15,8,14,14,12,9,13,14,9,4,1,11,4,6,6,6,3,2,0 };

static const uint8_t t12HB[64] =
{9,6,16,33,41,39,38,26,7,5,6,9,23,16,26,11,17,7,11,14,21,
30,10,7,17,10,15,12,18,28,14,5,32,13,22,19,18,16,9,5,40,17,
31,29,17,13,4,2,27,12,11,15,10,7,4,1,27,12,8,12,6,3,1,0 };

static const uint8_t t13HB[256] =
{1,5,14,21,34,51,46,71,42,52,68,52,67,44,43,19,3,4,12,19,31,26,44,33,31,24,32,
 24,31,35,22,14,15,13,23,36,59,49,77,65,29,40,30,40,27,33,42,16,22,20,37,61,56,
 79,73,64,43,76,56,37,26,31,25,14,35,16,60,57,97,75,114,91,54,73,55,41,48,53,
 23,24,58,27,50,96,76,70,93,84,77,58,79,29,74,49,41,17,47,45,78,74,115,94,90,
 79,69,83,71,50,59,38,36,15,72,34,56,95,92,85,91,90,86,73,77,65,51,44,43,42,43,
 20,30,44,55,78,72,87,78,61,46,54,37,30,20,16,53,25,41,37,44,59,54,81,66,76,57,
 54,37,18,39,11,35,33,31,57,42,82,72,80,47,58,55,21,22,26,38,22,53,25,23,38,70,
 60,51,36,55,26,34,23,27,14,9,7,34,32,28,39,49,75,30,52,48,40,52,28,18,17,9,5,
 45,21,34,64,56,50,49,45,31,19,12,15,10,7,6,3,48,23,20,39,36,35,53,21,16,23,13,
 10,6,1,4,2,16,15,17,27,25,20,29,11,17,12,16,8,1,1,0,1 };

static const uint8_t t15HB[256] =
{7,12,18,53,47,76,124,108,89,123,108,119,107,81,122,63,13,5,16,27,46,36,61,51,
 42,70,52,83,65,41,59,36,19,17,15,24,41,34,59,48,40,64,50,78,62,80,56,33,29,28,
 25,43,39,63,55,93,76,59,93,72,54,75,50,29,52,22,42,40,67,57,95,79,72,57,89,69,
 49,66,46,27,77,37,35,66,58,52,91,74,62,48,79,63,90,62,40,38,125,32,60,56,50,
 92,78,65,55,87,71,51,73,51,70,30,109,53,49,94,88,75,66,122,91,73,56,42,64,44,
 21,25,90,43,41,77,73,63,56,92,77,66,47,67,48,53,36,20,71,34,67,60,58,49,88,76,
 67,106,71,54,38,39,23,15,109,53,51,47,90,82,58,57,48,72,57,41,23,27,62,9,86,
 42,40,37,70,64,52,43,70,55,42,25,29,18,11,11,118,68,30,55,50,46,74,65,49,39,
 24,16,22,13,14,7,91,44,39,38,34,63,52,45,31,52,28,19,14,8,9,3,123,60,58,53,47,
 43,32,22,37,24,17,12,15,10,2,1,71,37,34,30,28,20,17,26,21,16,10,6,8,6,2,0};

static const uint16_t t16HB[256] =
{1,5,14,44,74,63,110,93,172,149,138,242,225,195,376,17,3,4,12,20,35,62,53,47,
 83,75,68,119,201,107,207,9,15,13,23,38,67,58,103,90,161,72,127,117,110,209,
 206,16,45,21,39,69,64,114,99,87,158,140,252,212,199,387,365,26,75,36,68,65,
 115,101,179,164,155,264,246,226,395,382,362,9,66,30,59,56,102,185,173,265,142,
 253,232,400,388,378,445,16,111,54,52,100,184,178,160,133,257,244,228,217,385,
 366,715,10,98,48,91,88,165,157,148,261,248,407,397,372,380,889,884,8,85,84,81,
 159,156,143,260,249,427,401,392,383,727,713,708,7,154,76,73,141,131,256,245,
 426,406,394,384,735,359,710,352,11,139,129,67,125,247,233,229,219,393,743,737,
 720,885,882,439,4,243,120,118,115,227,223,396,746,742,736,721,712,706,223,436,
 6,202,224,222,218,216,389,386,381,364,888,443,707,440,437,1728,4,747,211,210,
 208,370,379,734,723,714,1735,883,877,876,3459,865,2,377,369,102,187,726,722,
 358,711,709,866,1734,871,3458,870,434,0,12,10,7,11,10,17,11,9,13,12,10,7,5,3,
 1,3};

static const uint16_t t24HB[256] =
{15,13,46,80,146,262,248,434,426,669,653,649,621,517,1032,88,14,12,21,38,71,
 130,122,216,209,198,327,345,319,297,279,42,47,22,41,74,68,128,120,221,207,194,
 182,340,315,295,541,18,81,39,75,70,134,125,116,220,204,190,178,325,311,293,
 271,16,147,72,69,135,127,118,112,210,200,188,352,323,306,285,540,14,263,66,
 129,126,119,114,214,202,192,180,341,317,301,281,262,12,249,123,121,117,113,
 215,206,195,185,347,330,308,291,272,520,10,435,115,111,109,211,203,196,187,
 353,332,313,298,283,531,381,17,427,212,208,205,201,193,186,177,169,320,303,
 286,268,514,377,16,335,199,197,191,189,181,174,333,321,305,289,275,521,379,
 371,11,668,184,183,179,175,344,331,314,304,290,277,530,383,373,366,10,652,346,
 171,168,164,318,309,299,287,276,263,513,375,368,362,6,648,322,316,312,307,302,
 292,284,269,261,512,376,370,364,359,4,620,300,296,294,288,282,273,266,515,380,
 374,369,365,361,357,2,1033,280,278,274,267,264,259,382,378,372,367,363,360,
 358,356,0,43,20,19,17,15,13,11,9,7,6,4,7,5,3,1,3};

static const uint32_t tab1315[256] =
{ 0x010003,0x050005,0x070006,0x080008,0x090008,0x0a0009,0x0a000a,0x0b000a,
  0x0a000a,0x0b000b,0x0c000b,0x0c000c,0x0d000c,0x0d000c,0x0e000d,0x0e000e,
  0x040005,0x060005,0x080007,0x090008,0x0a0009,0x0a0009,0x0b000a,0x0b000a,
  0x0b000a,0x0b000b,0x0c000b,0x0c000c,0x0d000c,0x0e000c,0x0e000d,0x0e000d,
  0x070006,0x080007,0x090007,0x0a0008,0x0b0009,0x0b0009,0x0c000a,0x0c000a,
  0x0b000a,0x0c000b,0x0c000b,0x0d000c,0x0d000c,0x0e000d,0x0f000d,0x0f000d,
  0x080007,0x090008,0x0a0008,0x0b0009,0x0b0009,0x0c000a,0x0c000a,0x0c000b,
  0x0c000b,0x0d000b,0x0d000c,0x0d000c,0x0d000c,0x0e000d,0x0f000d,0x0f000d,
  0x090008,0x090008,0x0b0009,0x0b0009,0x0c000a,0x0c000a,0x0d000b,0x0d000b,
  0x0c000b,0x0d000b,0x0d000c,0x0e000c,0x0e000c,0x0f000d,0x0f000d,0x10000d,
  0x0a0009,0x0a0009,0x0b0009,0x0c000a,0x0c000a,0x0c000a,0x0d000b,0x0d000b,
  0x0d000b,0x0d000b,0x0e000c,0x0d000c,0x0f000d,0x0f000d,0x10000d,0x10000e,
  0x0a000a,0x0b0009,0x0c000a,0x0c000a,0x0d000a,0x0d000b,0x0d000b,0x0d000b,
  0x0d000b,0x0e000c,0x0e000c,0x0e000c,0x0f000d,0x0f000d,0x10000e,0x10000e,
  0x0b000a,0x0b000a,0x0c000a,0x0d000b,0x0d000b,0x0d000b,0x0e000b,0x0e000c,
  0x0e000c,0x0e000c,0x0f000c,0x0f000c,0x0f000d,0x10000d,0x12000d,0x12000e,
  0x0a000a,0x0a000a,0x0b000a,0x0c000b,0x0c000b,0x0d000b,0x0d000b,0x0e000c,
  0x0e000c,0x0e000c,0x0e000c,0x0f000d,0x0f000d,0x10000e,0x11000e,0x11000e,
  0x0b000a,0x0b000a,0x0c000b,0x0c000b,0x0d000b,0x0d000b,0x0d000c,0x0f000c,
  0x0e000c,0x0f000d,0x0f000d,0x10000d,0x10000d,0x10000e,0x12000e,0x11000e,
  0x0b000b,0x0c000b,0x0c000b,0x0d000b,0x0d000c,0x0e000c,0x0e000c,0x0f000c,
  0x0e000c,0x0f000d,0x10000d,0x0f000d,0x10000d,0x11000e,0x12000f,0x13000e,
  0x0c000b,0x0c000b,0x0c000b,0x0d000b,0x0e000c,0x0e000c,0x0e000c,0x0e000c,
  0x0f000d,0x0f000d,0x0f000d,0x10000d,0x11000e,0x11000e,0x11000e,0x12000f,
  0x0c000c,0x0d000c,0x0d000b,0x0e000c,0x0e000c,0x0f000c,0x0e000d,0x0f000d,
  0x10000d,0x10000d,0x11000d,0x11000d,0x11000e,0x12000e,0x12000f,0x12000f,
  0x0d000c,0x0d000c,0x0e000c,0x0f000c,0x0f000c,0x0f000d,0x10000d,0x10000d,
  0x10000d,0x10000e,0x10000e,0x11000e,0x12000e,0x11000e,0x12000f,0x12000f,
  0x0e000d,0x0e000d,0x0e000d,0x0f000d,0x0f000d,0x0f000d,0x11000d,0x10000d,
  0x10000e,0x13000e,0x11000e,0x11000e,0x11000f,0x13000f,0x12000e,0x12000f,
  0x0d000d,0x0e000d,0x0f000d,0x10000d,0x10000d,0x10000d,0x11000d,0x10000e,
  0x11000e,0x11000e,0x12000e,0x12000e,0x15000f,0x14000f,0x15000f,0x12000f };

static const uint32_t tab01[16] =
{ 0x10004,0x50005,0x50005,0x70006,0x50005,0x80006,0x70006,0x90007,
  0x50005,0x70006,0x70006,0x90007,0x70006,0x90007,0x90007,0xa0008 };

static const uint32_t tab23[ 9] =
{ 0x10002,0x40003,0x70007,0x40004,0x50004,0x70007,0x60006,0x70007,0x80008 };

static const uint32_t tab56[16] =
{ 0x10003,0x40004,0x70006,0x80008,0x40004,0x50004,0x80006,0x90007,
  0x70005,0x80006,0x90007,0xa0008,0x80007,0x80007,0x90008,0xa0009 };

static const uint32_t tab789[36] =
{0x00100803,0x00401004,0x00701c06,0x00902407,0x00902409,0x00a0280a,0x00401004,
 0x00601005,0x00801806,0x00902807,0x00902808,0x00a0280a,0x00701c05,0x00701806,
 0x00902007,0x00a02808,0x00a02809,0x00b02c0a,0x00802407,0x00902807,0x00a02808,
 0x00b02c09,0x00b02c09,0x00b0300a,0x00802408,0x00902408,0x00a02809,0x00b02c09,
 0x00b0300a,0x00c0300b,0x00902809,0x00a02809,0x00b02c0a,0x00c02c0a,0x00c0340b,
 0x00c0340b};

static const uint32_t tabABC[64] =
{0x00100804,0x00401004,0x00701806,0x00902008,0x00a02409,0x00a0280a,0x00a0240a,
 0x00b0280a,0x00401004,0x00601405,0x00801806,0x00902007,0x00a02809,0x00b02809,
 0x00a0240a,0x00a0280a,0x00701806,0x00801c06,0x00902007,0x00a02408,0x00b02809,
 0x00c02c0a,0x00b02809,0x00b0280a,0x00802007,0x00902007,0x00a02408,0x00b02c08,
 0x00c02809,0x00c0300a,0x00b0280a,0x00c02c0a,0x00902408,0x00a02808,0x00b02809,
 0x00c02c09,0x00c02c0a,0x00c0300a,0x00c02c0a,0x00c0300b,0x00a02409,0x00b02809,
 0x00c02c0a,0x00c0300a,0x00d0300a,0x00d0340b,0x00c0300a,0x00d0340b,0x00902409,
 0x00a02409,0x00b02409,0x00c0280a,0x00c02c0a,0x00c0300b,0x00d0300b,0x00d0300c,
 0x00a0240a,0x00a0240a,0x00b0280a,0x00c02c0b,0x00c0300b,0x00d0300b,0x00d0300b,
 0x00d0300c};

static const uint32_t tab1624[256] =
{0x00010004,0x00050005,0x00070007,0x00090008,0x000a0009,0x000a000a,0x000b000a,
 0x000b000b,0x000c000b,0x000c000c,0x000c000c,0x000d000c,0x000d000c,0x000d000c,
 0x000e000d,0x000a000a,0x00040005,0x00060006,0x00080007,0x00090008,0x000a0009,
 0x000b000a,0x000b000a,0x000b000b,0x000c000b,0x000c000b,0x000c000c,0x000d000c,
 0x000e000c,0x000d000c,0x000e000c,0x000a000a,0x00070007,0x00080007,0x00090008,
 0x000a0009,0x000b0009,0x000b000a,0x000c000a,0x000c000b,0x000d000b,0x000c000b,
 0x000d000b,0x000d000c,0x000d000c,0x000e000c,0x000e000d,0x000b0009,0x00090008,
 0x00090008,0x000a0009,0x000b0009,0x000b000a,0x000c000a,0x000c000a,0x000c000b,
 0x000d000b,0x000d000b,0x000e000b,0x000e000c,0x000e000c,0x000f000c,0x000f000c,
 0x000c0009,0x000a0009,0x000a0009,0x000b0009,0x000b000a,0x000c000a,0x000c000a,
 0x000d000a,0x000d000b,0x000d000b,0x000e000b,0x000e000c,0x000e000c,0x000f000c,
 0x000f000c,0x000f000d,0x000b0009,0x000a000a,0x000a0009,0x000b000a,0x000b000a,
 0x000c000a,0x000d000a,0x000d000b,0x000e000b,0x000d000b,0x000e000b,0x000e000c,
 0x000f000c,0x000f000c,0x000f000c,0x0010000c,0x000c0009,0x000b000a,0x000b000a,
 0x000b000a,0x000c000a,0x000d000a,0x000d000b,0x000d000b,0x000d000b,0x000e000b,
 0x000e000c,0x000e000c,0x000e000c,0x000f000c,0x000f000c,0x0010000d,0x000c0009,
 0x000b000b,0x000b000a,0x000c000a,0x000c000a,0x000d000b,0x000d000b,0x000d000b,
 0x000e000b,0x000e000c,0x000f000c,0x000f000c,0x000f000c,0x000f000c,0x0011000d,
 0x0011000d,0x000c000a,0x000b000b,0x000c000b,0x000c000b,0x000d000b,0x000d000b,
 0x000d000b,0x000e000b,0x000e000b,0x000f000b,0x000f000c,0x000f000c,0x000f000c,
 0x0010000c,0x0010000d,0x0010000d,0x000c000a,0x000c000b,0x000c000b,0x000c000b,
 0x000d000b,0x000d000b,0x000e000b,0x000e000b,0x000f000c,0x000f000c,0x000f000c,
 0x000f000c,0x0010000c,0x000f000d,0x0010000d,0x000f000d,0x000d000a,0x000c000c,
 0x000d000b,0x000c000b,0x000d000b,0x000e000b,0x000e000c,0x000e000c,0x000e000c,
 0x000f000c,0x0010000c,0x0010000c,0x0010000d,0x0011000d,0x0011000d,0x0010000d,
 0x000c000a,0x000d000c,0x000d000c,0x000d000b,0x000d000b,0x000e000b,0x000e000c,
 0x000f000c,0x0010000c,0x0010000c,0x0010000c,0x0010000c,0x0010000d,0x0010000d,
 0x000f000d,0x0010000d,0x000d000a,0x000d000c,0x000e000c,0x000e000c,0x000e000c,
 0x000e000c,0x000f000c,0x000f000c,0x000f000c,0x000f000c,0x0011000c,0x0010000d,
 0x0010000d,0x0010000d,0x0010000d,0x0012000d,0x000d000a,0x000f000c,0x000e000c,
 0x000e000c,0x000e000c,0x000f000c,0x000f000c,0x0010000c,0x0010000c,0x0010000d,
 0x0012000d,0x0011000d,0x0011000d,0x0011000d,0x0013000d,0x0011000d,0x000d000a,
 0x000e000d,0x000f000c,0x000d000c,0x000e000c,0x0010000c,0x0010000c,0x000f000c,
 0x0010000d,0x0010000d,0x0011000d,0x0012000d,0x0011000d,0x0013000d,0x0011000d,
 0x0010000d,0x000d000a,0x000a0009,0x000a0009,0x000a0009,0x000b0009,0x000b0009,
 0x000c0009,0x000c0009,0x000c0009,0x000d0009,0x000d0009,0x000d0009,0x000d000a,
 0x000d000a,0x000d000a,0x000d000a,0x000a0006};

static const uint8_t t1l[8]  = {1,3,2,3,1,4,3,5};
static const uint8_t t2l[9]  = {1,3,6,3,3,5,5,5,6};
static const uint8_t t3l[9]  = {2,2,6,3,2,5,5,5,6};
static const uint8_t t5l[16] = {1,3,6,7,3,3,6,7,6,6,7,8,7,6,7,8};
static const uint8_t t6l[16] = {3,3,5,7,3,2,4,5,4,4,5,6,6,5,6,7};

static const uint8_t t7l[36] =
{1,3,6,8,8,9,3,4,6,7,7,8,6,5,7,8,8,9,7,7,8,9,9,9,7,7,8,9,9,10,8,8,9,10,10,10};

static const uint8_t t8l[36] =
{2,3,6,8,8,9,3,2,4,8,8,8,6,4,6,8,8,9,8,8,8,9,9,10,8,7,8,9,10,10,9,8,9,9,11,11};

static const uint8_t t9l[36] =
{3,3,5,6,8,9,3,3,4,5,6,8,4,4,5,6,7,8,6,5,6,7,7,8,7,6,7,7,8,9,8,7,8,8,9,9};

static const uint8_t t10l[64] =
{1,3,6,8,9,9,9,10,3,4,6,7,8,9,8,8,6,6,7,8,9,10,9,9,7,7,8,9,10,10,9,10,8,8,9,10,
 10,10,10,10,9,9,10,10,11,11,10,11,8,8,9,10,10,10,11,11,9,8,9,10,10,11,11,11};

static const uint8_t t11l[64] =
{2,3,5,7,8,9,8,9,3,3,4,6,8,8,7,8,5,5,6,7,8,9,8,8,7,6,7,9,8,10,8,9,8,8,8,9,9,10,
 9,10,8,8,9,10,10,11,10,11,8,7,7,8,9,10,10,10,8,7,8,9,10,10,10,10};

static const uint8_t t12l[64] =
{4,3,5,7,8,9,9,9,3,3,4,5,7,7,8,8,5,4,5,6,7,8,7,8,6,5,6,6,7,8,8,8,7,6,7,7,8,
 8,8,9,8,7,8,8,8,9,8,9,8,7,7,8,8,9,9,10,9,8,8,9,9,9,9,10};

static const uint8_t t13l[256] =
{1,4,6,7,8,9,9,10,9,10,11,11,12,12,13,13,3,4,6,7,8,8,9,9,9,9,10,10,11,12,12,12,
 6,6,7,8,9,9,10,10,9,10,10,11,11,12,13,13,7,7,8,9,9,10,10,10,10,11,11,11,11,12,
 13,13,8,7,9,9,10,10,11,11,10,11,11,12,12,13,13,14,9,8,9,10,10,10,11,11,11,11,
 12,11,13,13,14,14,9,9,10,10,11,11,11,11,11,12,12,12,13,13,14,14,10,9,10,11,11,
 11,12,12,12,12,13,13,13,14,16,16,9,8,9,10,10,11,11,12,12,12,12,13,13,14,15,15,
 10,9,10,10,11,11,11,13,12,13,13,14,14,14,16,15,10,10,10,11,11,12,12,13,12,13,
 14,13,14,15,16,17,11,10,10,11,12,12,12,12,13,13,13,14,15,15,15,16,11,11,11,12,
 12,13,12,13,14,14,15,15,15,16,16,16,12,11,12,13,13,13,14,14,14,14,14,15,16,15,
 16,16,13,12,12,13,13,13,15,14,14,17,15,15,15,17,16,16,12,12,13,14,14,14,15,14,
 15,15,16,16,19,18,19,16};

static const uint8_t t15l[256] =
{3,4,5,7,7,8,9,9,9,10,10,11,11,11,12,13,4,3,5,6,7,7,8,8,8,9,9,10,10,10,11,11,5,
 5,5,6,7,7,8,8,8,9,9,10,10,11,11,11,6,6,6,7,7,8,8,9,9,9,10,10,10,11,11,11,7,6,
 7,7,8,8,9,9,9,9,10,10,10,11,11,11,8,7,7,8,8,8,9,9,9,9,10,10,11,11,11,12,9,7,8,
 8,8,9,9,9,9,10,10,10,11,11,12,12,9,8,8,9,9,9,9,10,10,10,10,10,11,11,11,12,9,8,
 8,9,9,9,9,10,10,10,10,11,11,12,12,12,9,8,9,9,9,9,10,10,10,11,11,11,11,12,12,
 12,10,9,9,9,10,10,10,10,10,11,11,11,11,12,13,12,10,9,9,9,10,10,10,10,11,11,11,
 11,12,12,12,13,11,10,9,10,10,10,11,11,11,11,11,11,12,12,13,13,11,10,10,10,10,
 11,11,11,11,12,12,12,12,12,13,13,12,11,11,11,11,11,11,11,12,12,12,12,13,13,12,
 13,12,11,11,11,11,11,11,12,12,12,12,12,13,13,13,13};

static const uint8_t t16l[256] =
{1,4,6,8,9,9,10,10,11,11,11,12,12,12,13,9,3,4,6,7,8,9,9,9,10,10,10,11,12,11,12,
 8,6,6,7,8,9,9,10,10,11,10,11,11,11,12,12,9,8,7,8,9,9,10,10,10,11,11,12,12,12,
 13,13,10,9,8,9,9,10,10,11,11,11,12,12,12,13,13,13,9,9,8,9,9,10,11,11,12,11,12,
 12,13,13,13,14,10,10,9,9,10,11,11,11,11,12,12,12,12,13,13,14,10,10,9,10,10,11,
 11,11,12,12,13,13,13,13,15,15,10,10,10,10,11,11,11,12,12,13,13,13,13,14,14,14,
 10,11,10,10,11,11,12,12,13,13,13,13,14,13,14,13,11,11,11,10,11,12,12,12,12,13,
 14,14,14,15,15,14,10,12,11,11,11,12,12,13,14,14,14,14,14,14,13,14,11,12,12,12,
 12,12,13,13,13,13,15,14,14,14,14,16,11,14,12,12,12,13,13,14,14,14,16,15,15,15,
 17,15,11,13,13,11,12,14,14,13,14,14,15,16,15,17,15,14,11,9,8,8,9,9,10,10,10,
 11,11,11,11,11,11,11,8};

static const uint8_t t24l[256] =
{4,4,6,7,8,9,9,10,10,11,11,11,11,11,12,9,4,4,5,6,7,8,8,9,9,9,10,10,10,10,10,8,
 6,5,6,7,7,8,8,9,9,9,9,10,10,10,11,7,7,6,7,7,8,8,8,9,9,9,9,10,10,10,10,7,8,7,7,
 8,8,8,8,9,9,9,10,10,10,10,11,7,9,7,8,8,8,8,9,9,9,9,10,10,10,10,10,7,9,8,8,8,8,
 9,9,9,9,10,10,10,10,10,11,7,10,8,8,8,9,9,9,9,10,10,10,10,10,11,11,8,10,9,9,9,
 9,9,9,9,9,10,10,10,10,11,11,8,10,9,9,9,9,9,9,10,10,10,10,10,11,11,11,8,11,9,9,
 9,9,10,10,10,10,10,10,11,11,11,11,8,11,10,9,9,9,10,10,10,10,10,10,11,11,11,11,
 8,11,10,10,10,10,10,10,10,10,10,11,11,11,11,11,8,11,10,10,10,10,10,10,10,11,
 11,11,11,11,11,11,8,12,10,10,10,10,10,10,11,11,11,11,11,11,11,11,8,8,7,7,7,7,
 7,7,7,7,7,7,8,8,8,8,4};

static struct huffcodetab ht[HTN] =
{ { 0, NULL, NULL}, /* Apparently not used */
  { 2, t1HB,  t1l},
  { 3, t2HB,  t2l},
  { 3, t3HB,  t3l},
  { 0, NULL, NULL}, /* Apparently not used */
  { 4, t5HB,  t5l},
  { 4, t6HB,  t6l},
  { 6, t7HB,  t7l},
  { 6, t8HB,  t8l},
  { 6, t9HB,  t9l},
  { 8, t10HB, t10l},
  { 8, t11HB, t11l},
  { 8, t12HB, t12l},
  {16, t13HB, t13l},
  { 0, NULL,  NULL}, /* Apparently not used */
  {16, t15HB, t15l} };

static const struct huffcodebig ht_big[HTN] =
{ { 16,  1,    1 },
  { 16,  2,    3 },
  { 16,  3,    7 },
  { 16,  4,   15 },
  { 16,  6,   63 },
  { 16,  8,  255 },
  { 16, 10, 1023 },
  { 16, 13, 8191 },
  { 16,  4,   15 },
  { 16,  5,   31 },
  { 16,  6,   63 },
  { 16,  7,  127 },
  { 16,  8,  255 },
  { 16,  9,  511 },
  { 16, 11, 2047 },
  { 16, 13, 8191 } };

static const struct
{
  const uint8_t region0_cnt;
  const uint8_t region1_cnt;
} subdv_table[23] =
{ {0, 0}, /*  0 bands */
  {0, 0}, /*  1 bands */
  {0, 0}, /*  2 bands */
  {0, 0}, /*  3 bands */
  {0, 0}, /*  4 bands */
  {0, 1}, /*  5 bands */
  {1, 1}, /*  6 bands */
  {1, 1}, /*  7 bands */
  {1, 2}, /*  8 bands */
  {2, 2}, /*  9 bands */
  {2, 3}, /* 10 bands */
  {2, 3}, /* 11 bands */
  {3, 4}, /* 12 bands */
  {3, 4}, /* 13 bands */
  {3, 4}, /* 14 bands */
  {4, 5}, /* 15 bands */
  {4, 5}, /* 16 bands */
  {4, 6}, /* 17 bands */
  {5, 6}, /* 18 bands */
  {5, 6}, /* 19 bands */
  {5, 7}, /* 20 bands */
  {6, 7}, /* 21 bands */
  {6, 7}, /* 22 bands */
};

static const uint16_t sfBand[6][23] =
{
/* Table B.2.b: 22.05 kHz */
{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
/* Table B.2.c: 24 kHz */
{0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576},
/* Table B.2.a: 16 kHz */
{0,6,12,18,24,30,36,44,45,66,80,96,116,140,168,200,238,248,336,396,464,522,576},
/* Table B.8.b: 44.1 kHz */
{0,4, 8,12,16,20,24,30,36,44,52,62, 74, 90,110,134,162,196,238,288,342,418,576},
/* Table B.8.c: 48 kHz */
{0,4, 8,12,16,20,24,30,36,42,50,60, 72, 88,106,128,156,190,230,276,330,384,576},
/* Table B.8.a: 32 kHz */
{0,4, 8,12,16,20,24,30,36,44,54,66, 82,102,126,156,194,240,296,364,448,550,576} };


static const uint16_t int2idx[4096] = /*  int2idx[i] = sqrt(i*sqrt(i)); */
{
  0,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  6,  7,  7,  8,  8,  8,  9,  9,
  9, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16,
 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21,
 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26,
 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 34, 35, 35, 35, 35, 36, 36, 36,
 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 38, 39, 39, 39, 39, 40, 40, 40, 40, 40,
 41, 41, 41, 41, 42, 42, 42, 42, 42, 43, 43, 43, 43, 44, 44, 44, 44, 44, 45, 45,
 45, 45, 45, 46, 46, 46, 46, 46, 47, 47, 47, 47, 47, 48, 48, 48, 48, 49, 49, 49,
 49, 49, 50, 50, 50, 50, 50, 51, 51, 51, 51, 51, 52, 52, 52, 52, 52, 53, 53, 53,
 53, 53, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 56, 56, 56, 56, 56, 57, 57, 57,
 57, 57, 58, 58, 58, 58, 58, 58, 59, 59, 59, 59, 59, 60, 60, 60, 60, 60, 61, 61,
 61, 61, 61, 62, 62, 62, 62, 62, 62, 63, 63, 63, 63, 63, 64, 64, 64, 64, 64, 65,
 65, 65, 65, 65, 65, 66, 66, 66, 66, 66, 67, 67, 67, 67, 67, 68, 68, 68, 68, 68,
 68, 69, 69, 69, 69, 69, 70, 70, 70, 70, 70, 70, 71, 71, 71, 71, 71, 72, 72, 72,
 72, 72, 72, 73, 73, 73, 73, 73, 74, 74, 74, 74, 74, 74, 75, 75, 75, 75, 75, 75,
 76, 76, 76, 76, 76, 77, 77, 77, 77, 77, 77, 78, 78, 78, 78, 78, 78, 79, 79, 79,
 79, 79, 80, 80, 80, 80, 80, 80, 81, 81, 81, 81, 81, 81, 82, 82, 82, 82, 82, 82,
 83, 83, 83, 83, 83, 84, 84, 84, 84, 84, 84, 85, 85, 85, 85, 85, 85, 86, 86, 86,
 86, 86, 86, 87, 87, 87, 87, 87, 87, 88, 88, 88, 88, 88, 88, 89, 89, 89, 89, 89,
 89, 90, 90, 90, 90, 90, 90, 91, 91, 91, 91, 91, 91, 92, 92, 92, 92, 92, 92, 93,
 93, 93, 93, 93, 93, 94, 94, 94, 94, 94, 94, 95, 95, 95, 95, 95, 95, 96, 96, 96,
 96, 96, 96, 97, 97, 97, 97, 97, 97, 98, 98, 98, 98, 98, 98, 99, 99, 99, 99, 99,
 99, 99,100,100,100,100,100,100,101,101,101,101,101,101,102,102,102,102,102,102,
103,103,103,103,103,103,104,104,104,104,104,104,104,105,105,105,105,105,105,106,
106,106,106,106,106,107,107,107,107,107,107,107,108,108,108,108,108,108,109,109,
109,109,109,109,110,110,110,110,110,110,110,111,111,111,111,111,111,112,112,112,
112,112,112,112,113,113,113,113,113,113,114,114,114,114,114,114,115,115,115,115,
115,115,115,116,116,116,116,116,116,117,117,117,117,117,117,117,118,118,118,118,
118,118,118,119,119,119,119,119,119,120,120,120,120,120,120,120,121,121,121,121,
121,121,122,122,122,122,122,122,122,123,123,123,123,123,123,123,124,124,124,124,
124,124,125,125,125,125,125,125,125,126,126,126,126,126,126,126,127,127,127,127,
127,127,128,128,128,128,128,128,128,129,129,129,129,129,129,129,130,130,130,130,
130,130,131,131,131,131,131,131,131,132,132,132,132,132,132,132,133,133,133,133,
133,133,133,134,134,134,134,134,134,134,135,135,135,135,135,135,136,136,136,136,
136,136,136,137,137,137,137,137,137,137,138,138,138,138,138,138,138,139,139,139,
139,139,139,139,140,140,140,140,140,140,140,141,141,141,141,141,141,141,142,142,
142,142,142,142,142,143,143,143,143,143,143,143,144,144,144,144,144,144,144,145,
145,145,145,145,145,145,146,146,146,146,146,146,146,147,147,147,147,147,147,147,
148,148,148,148,148,148,148,149,149,149,149,149,149,149,150,150,150,150,150,150,
150,151,151,151,151,151,151,151,152,152,152,152,152,152,152,153,153,153,153,153,
153,153,154,154,154,154,154,154,154,154,155,155,155,155,155,155,155,156,156,156,
156,156,156,156,157,157,157,157,157,157,157,158,158,158,158,158,158,158,159,159,
159,159,159,159,159,160,160,160,160,160,160,160,160,161,161,161,161,161,161,161,
162,162,162,162,162,162,162,163,163,163,163,163,163,163,163,164,164,164,164,164,
164,164,165,165,165,165,165,165,165,166,166,166,166,166,166,166,167,167,167,167,
167,167,167,167,168,168,168,168,168,168,168,169,169,169,169,169,169,169,169,170,
170,170,170,170,170,170,171,171,171,171,171,171,171,172,172,172,172,172,172,172,
172,173,173,173,173,173,173,173,174,174,174,174,174,174,174,174,175,175,175,175,
175,175,175,176,176,176,176,176,176,176,176,177,177,177,177,177,177,177,178,178,
178,178,178,178,178,178,179,179,179,179,179,179,179,180,180,180,180,180,180,180,
180,181,181,181,181,181,181,181,182,182,182,182,182,182,182,182,183,183,183,183,
183,183,183,184,184,184,184,184,184,184,184,185,185,185,185,185,185,185,186,186,
186,186,186,186,186,186,187,187,187,187,187,187,187,187,188,188,188,188,188,188,
188,189,189,189,189,189,189,189,189,190,190,190,190,190,190,190,190,191,191,191,
191,191,191,191,192,192,192,192,192,192,192,192,193,193,193,193,193,193,193,193,
194,194,194,194,194,194,194,195,195,195,195,195,195,195,195,196,196,196,196,196,
196,196,196,197,197,197,197,197,197,197,197,198,198,198,198,198,198,198,199,199,
199,199,199,199,199,199,200,200,200,200,200,200,200,200,201,201,201,201,201,201,
201,201,202,202,202,202,202,202,202,202,203,203,203,203,203,203,203,204,204,204,
204,204,204,204,204,205,205,205,205,205,205,205,205,206,206,206,206,206,206,206,
206,207,207,207,207,207,207,207,207,208,208,208,208,208,208,208,208,209,209,209,
209,209,209,209,209,210,210,210,210,210,210,210,210,211,211,211,211,211,211,211,
211,212,212,212,212,212,212,212,212,213,213,213,213,213,213,213,213,214,214,214,
214,214,214,214,214,215,215,215,215,215,215,215,215,216,216,216,216,216,216,216,
216,217,217,217,217,217,217,217,217,218,218,218,218,218,218,218,218,219,219,219,
219,219,219,219,219,220,220,220,220,220,220,220,220,221,221,221,221,221,221,221,
221,222,222,222,222,222,222,222,222,223,223,223,223,223,223,223,223,224,224,224,
224,224,224,224,224,225,225,225,225,225,225,225,225,226,226,226,226,226,226,226,
226,227,227,227,227,227,227,227,227,228,228,228,228,228,228,228,228,229,229,229,
229,229,229,229,229,229,230,230,230,230,230,230,230,230,231,231,231,231,231,231,
231,231,232,232,232,232,232,232,232,232,233,233,233,233,233,233,233,233,234,234,
234,234,234,234,234,234,234,235,235,235,235,235,235,235,235,236,236,236,236,236,
236,236,236,237,237,237,237,237,237,237,237,238,238,238,238,238,238,238,238,238,
239,239,239,239,239,239,239,239,240,240,240,240,240,240,240,240,241,241,241,241,
241,241,241,241,242,242,242,242,242,242,242,242,242,243,243,243,243,243,243,243,
243,244,244,244,244,244,244,244,244,245,245,245,245,245,245,245,245,245,246,246,
246,246,246,246,246,246,247,247,247,247,247,247,247,247,248,248,248,248,248,248,
248,248,248,249,249,249,249,249,249,249,249,250,250,250,250,250,250,250,250,250,
251,251,251,251,251,251,251,251,252,252,252,252,252,252,252,252,253,253,253,253,
253,253,253,253,253,254,254,254,254,254,254,254,254,255,255,255,255,255,255,255,
255,255,256,256,256,256,256,256,256,256,257,257,257,257,257,257,257,257,257,258,
258,258,258,258,258,258,258,259,259,259,259,259,259,259,259,259,260,260,260,260,
260,260,260,260,261,261,261,261,261,261,261,261,261,262,262,262,262,262,262,262,
262,263,263,263,263,263,263,263,263,263,264,264,264,264,264,264,264,264,265,265,
265,265,265,265,265,265,265,266,266,266,266,266,266,266,266,267,267,267,267,267,
267,267,267,267,268,268,268,268,268,268,268,268,268,269,269,269,269,269,269,269,
269,270,270,270,270,270,270,270,270,270,271,271,271,271,271,271,271,271,271,272,
272,272,272,272,272,272,272,273,273,273,273,273,273,273,273,273,274,274,274,274,
274,274,274,274,275,275,275,275,275,275,275,275,275,276,276,276,276,276,276,276,
276,276,277,277,277,277,277,277,277,277,277,278,278,278,278,278,278,278,278,279,
279,279,279,279,279,279,279,279,280,280,280,280,280,280,280,280,280,281,281,281,
281,281,281,281,281,282,282,282,282,282,282,282,282,282,283,283,283,283,283,283,
283,283,283,284,284,284,284,284,284,284,284,284,285,285,285,285,285,285,285,285,
286,286,286,286,286,286,286,286,286,287,287,287,287,287,287,287,287,287,288,288,
288,288,288,288,288,288,288,289,289,289,289,289,289,289,289,289,290,290,290,290,
290,290,290,290,291,291,291,291,291,291,291,291,291,292,292,292,292,292,292,292,
292,292,293,293,293,293,293,293,293,293,293,294,294,294,294,294,294,294,294,294,
295,295,295,295,295,295,295,295,295,296,296,296,296,296,296,296,296,296,297,297,
297,297,297,297,297,297,297,298,298,298,298,298,298,298,298,299,299,299,299,299,
299,299,299,299,300,300,300,300,300,300,300,300,300,301,301,301,301,301,301,301,
301,301,302,302,302,302,302,302,302,302,302,303,303,303,303,303,303,303,303,303,
304,304,304,304,304,304,304,304,304,305,305,305,305,305,305,305,305,305,306,306,
306,306,306,306,306,306,306,307,307,307,307,307,307,307,307,307,308,308,308,308,
308,308,308,308,308,309,309,309,309,309,309,309,309,309,310,310,310,310,310,310,
310,310,310,311,311,311,311,311,311,311,311,311,312,312,312,312,312,312,312,312,
312,313,313,313,313,313,313,313,313,313,314,314,314,314,314,314,314,314,314,315,
315,315,315,315,315,315,315,315,316,316,316,316,316,316,316,316,316,317,317,317,
317,317,317,317,317,317,318,318,318,318,318,318,318,318,318,318,319,319,319,319,
319,319,319,319,319,320,320,320,320,320,320,320,320,320,321,321,321,321,321,321,
321,321,321,322,322,322,322,322,322,322,322,322,323,323,323,323,323,323,323,323,
323,324,324,324,324,324,324,324,324,324,325,325,325,325,325,325,325,325,325,325,
326,326,326,326,326,326,326,326,326,327,327,327,327,327,327,327,327,327,328,328,
328,328,328,328,328,328,328,329,329,329,329,329,329,329,329,329,330,330,330,330,
330,330,330,330,330,330,331,331,331,331,331,331,331,331,331,332,332,332,332,332,
332,332,332,332,333,333,333,333,333,333,333,333,333,334,334,334,334,334,334,334,
334,334,335,335,335,335,335,335,335,335,335,335,336,336,336,336,336,336,336,336,
336,337,337,337,337,337,337,337,337,337,338,338,338,338,338,338,338,338,338,338,
339,339,339,339,339,339,339,339,339,340,340,340,340,340,340,340,340,340,341,341,
341,341,341,341,341,341,341,341,342,342,342,342,342,342,342,342,342,343,343,343,
343,343,343,343,343,343,344,344,344,344,344,344,344,344,344,344,345,345,345,345,
345,345,345,345,345,346,346,346,346,346,346,346,346,346,347,347,347,347,347,347,
347,347,347,347,348,348,348,348,348,348,348,348,348,349,349,349,349,349,349,349,
349,349,350,350,350,350,350,350,350,350,350,350,351,351,351,351,351,351,351,351,
351,352,352,352,352,352,352,352,352,352,352,353,353,353,353,353,353,353,353,353,
354,354,354,354,354,354,354,354,354,355,355,355,355,355,355,355,355,355,355,356,
356,356,356,356,356,356,356,356,357,357,357,357,357,357,357,357,357,357,358,358,
358,358,358,358,358,358,358,359,359,359,359,359,359,359,359,359,359,360,360,360,
360,360,360,360,360,360,361,361,361,361,361,361,361,361,361,361,362,362,362,362,
362,362,362,362,362,363,363,363,363,363,363,363,363,363,363,364,364,364,364,364,
364,364,364,364,365,365,365,365,365,365,365,365,365,365,366,366,366,366,366,366,
366,366,366,367,367,367,367,367,367,367,367,367,367,368,368,368,368,368,368,368,
368,368,369,369,369,369,369,369,369,369,369,369,370,370,370,370,370,370,370,370,
370,370,371,371,371,371,371,371,371,371,371,372,372,372,372,372,372,372,372,372,
372,373,373,373,373,373,373,373,373,373,374,374,374,374,374,374,374,374,374,374,
375,375,375,375,375,375,375,375,375,375,376,376,376,376,376,376,376,376,376,377,
377,377,377,377,377,377,377,377,377,378,378,378,378,378,378,378,378,378,379,379,
379,379,379,379,379,379,379,379,380,380,380,380,380,380,380,380,380,380,381,381,
381,381,381,381,381,381,381,382,382,382,382,382,382,382,382,382,382,383,383,383,
383,383,383,383,383,383,383,384,384,384,384,384,384,384,384,384,385,385,385,385,
385,385,385,385,385,385,386,386,386,386,386,386,386,386,386,386,387,387,387,387,
387,387,387,387,387,387,388,388,388,388,388,388,388,388,388,389,389,389,389,389,
389,389,389,389,389,390,390,390,390,390,390,390,390,390,390,391,391,391,391,391,
391,391,391,391,391,392,392,392,392,392,392,392,392,392,393,393,393,393,393,393,
393,393,393,393,394,394,394,394,394,394,394,394,394,394,395,395,395,395,395,395,
395,395,395,395,396,396,396,396,396,396,396,396,396,397,397,397,397,397,397,397,
397,397,397,398,398,398,398,398,398,398,398,398,398,399,399,399,399,399,399,399,
399,399,399,400,400,400,400,400,400,400,400,400,400,401,401,401,401,401,401,401,
401,401,402,402,402,402,402,402,402,402,402,402,403,403,403,403,403,403,403,403,
403,403,404,404,404,404,404,404,404,404,404,404,405,405,405,405,405,405,405,405,
405,405,406,406,406,406,406,406,406,406,406,406,407,407,407,407,407,407,407,407,
407,407,408,408,408,408,408,408,408,408,408,408,409,409,409,409,409,409,409,409,
409,410,410,410,410,410,410,410,410,410,410,411,411,411,411,411,411,411,411,411,
411,412,412,412,412,412,412,412,412,412,412,413,413,413,413,413,413,413,413,413,
413,414,414,414,414,414,414,414,414,414,414,415,415,415,415,415,415,415,415,415,
415,416,416,416,416,416,416,416,416,416,416,417,417,417,417,417,417,417,417,417,
417,418,418,418,418,418,418,418,418,418,418,419,419,419,419,419,419,419,419,419,
419,420,420,420,420,420,420,420,420,420,420,421,421,421,421,421,421,421,421,421,
421,422,422,422,422,422,422,422,422,422,422,423,423,423,423,423,423,423,423,423,
423,424,424,424,424,424,424,424,424,424,424,425,425,425,425,425,425,425,425,425,
425,426,426,426,426,426,426,426,426,426,426,427,427,427,427,427,427,427,427,427,
427,428,428,428,428,428,428,428,428,428,428,429,429,429,429,429,429,429,429,429,
429,430,430,430,430,430,430,430,430,430,430,431,431,431,431,431,431,431,431,431,
431,432,432,432,432,432,432,432,432,432,432,433,433,433,433,433,433,433,433,433,
433,434,434,434,434,434,434,434,434,434,434,435,435,435,435,435,435,435,435,435,
435,435,436,436,436,436,436,436,436,436,436,436,437,437,437,437,437,437,437,437,
437,437,438,438,438,438,438,438,438,438,438,438,439,439,439,439,439,439,439,439,
439,439,440,440,440,440,440,440,440,440,440,440,441,441,441,441,441,441,441,441,
441,441,442,442,442,442,442,442,442,442,442,442,443,443,443,443,443,443,443,443,
443,443,443,444,444,444,444,444,444,444,444,444,444,445,445,445,445,445,445,445,
445,445,445,446,446,446,446,446,446,446,446,446,446,447,447,447,447,447,447,447,
447,447,447,448,448,448,448,448,448,448,448,448,448,448,449,449,449,449,449,449,
449,449,449,449,450,450,450,450,450,450,450,450,450,450,451,451,451,451,451,451,
451,451,451,451,452,452,452,452,452,452,452,452,452,452,453,453,453,453,453,453,
453,453,453,453,453,454,454,454,454,454,454,454,454,454,454,455,455,455,455,455,
455,455,455,455,455,456,456,456,456,456,456,456,456,456,456,457,457,457,457,457,
457,457,457,457,457,457,458,458,458,458,458,458,458,458,458,458,459,459,459,459,
459,459,459,459,459,459,460,460,460,460,460,460,460,460,460,460,460,461,461,461,
461,461,461,461,461,461,461,462,462,462,462,462,462,462,462,462,462,463,463,463,
463,463,463,463,463,463,463,463,464,464,464,464,464,464,464,464,464,464,465,465,
465,465,465,465,465,465,465,465,466,466,466,466,466,466,466,466,466,466,466,467,
467,467,467,467,467,467,467,467,467,468,468,468,468,468,468,468,468,468,468,469,
469,469,469,469,469,469,469,469,469,469,470,470,470,470,470,470,470,470,470,470,
471,471,471,471,471,471,471,471,471,471,472,472,472,472,472,472,472,472,472,472,
472,473,473,473,473,473,473,473,473,473,473,474,474,474,474,474,474,474,474,474,
474,475,475,475,475,475,475,475,475,475,475,475,476,476,476,476,476,476,476,476,
476,476,477,477,477,477,477,477,477,477,477,477,477,478,478,478,478,478,478,478,
478,478,478,479,479,479,479,479,479,479,479,479,479,479,480,480,480,480,480,480,
480,480,480,480,481,481,481,481,481,481,481,481,481,481,482,482,482,482,482,482,
482,482,482,482,482,483,483,483,483,483,483,483,483,483,483,484,484,484,484,484,
484,484,484,484,484,484,485,485,485,485,485,485,485,485,485,485,486,486,486,486,
486,486,486,486,486,486,486,487,487,487,487,487,487,487,487,487,487,488,488,488,
488,488,488,488,488,488,488,488,489,489,489,489,489,489,489,489,489,489,490,490,
490,490,490,490,490,490,490,490,490,491,491,491,491,491,491,491,491,491,491,492,
492,492,492,492,492,492,492,492,492,492,493,493,493,493,493,493,493,493,493,493,
494,494,494,494,494,494,494,494,494,494,494,495,495,495,495,495,495,495,495,495,
495,496,496,496,496,496,496,496,496,496,496,496,497,497,497,497,497,497,497,497,
497,497,497,498,498,498,498,498,498,498,498,498,498,499,499,499,499,499,499,499,
499,499,499,499,500,500,500,500,500,500,500,500,500,500,501,501,501,501,501,501,
501,501,501,501,501,502,502,502,502,502,502,502,502,502,502,503,503,503,503,503,
503,503,503,503,503,503,504,504,504,504,504,504,504,504,504,504,504,505,505,505,
505,505,505,505,505,505,505,506,506,506,506,506,506,506,506,506,506,506,507,507,
507,507,507,507,507,507,507,507,507,508,508,508,508,508,508,508,508,508,508,509,
509,509,509,509,509,509,509,509,509,509,510,510,510,510,510,510,510,510,510,510,
510,511,511,511,511,511,511,511,511,511,511,512,512,512,512,512 };

static const uint8_t order[32] =
{ 0, 1, 16, 17, 8, 9, 24, 25, 4, 5, 20, 21, 12, 13, 28, 29,
  2, 3, 18, 19,10,11, 26, 27, 6, 7, 22, 23, 14, 15, 30, 31 };

static const uint16_t sampr_index[2][3] =
{ { 22050, 24000, 16000 },      /* MPEG 2 */
  { 44100, 48000, 32000 } };    /* MPEG 1 */

static const uint16_t bitr_index[2][15] =
{ {0, 8,16,24,32,40,48,56, 64, 80, 96,112,128,144,160},    /* MPEG 2 */
  {0,32,40,48,56,64,80,96,112,128,160,192,224,256,320} };  /* MPEG 1 */

static const uint8_t num_bands[3][15]  =
{ {0,10,10,10,10,12,14,16, 20, 22, 24, 26, 28, 30, 32},
  {0,10,10,10,10,10,12,14, 18, 24, 26, 28, 30, 32, 32},
  {0,10,12,14,18,24,26,28, 30, 32, 32, 32, 32, 32, 32} };

static const int16_t cx[9] =
{ 16135, 10531,  5604, 15396, -2845,-12551, 14189,  8192, 16384 };

static const int16_t ca[8] =
{-16859,-15458,-10269, -5961, -3099, -1342,  -465,  -121 };

static const uint16_t cs[8] =
{ 28098, 28893, 31117, 32221, 32621, 32740, 32765, 32768 };

static const int16_t enwindow[15*27+24] =
{ 0,   65,  593,  1766, 22228, 2115, 611, 62,
  8,  119, 1419, 10564,-11659,-1635,-154, -9,
 -8, -119,-1419,-10564, 11659, 1635, 154,  9, 464,  100,  91,
  0,   69,  604,  1635, 23148, 2363, 643, 62,
  7,  107, 1368, 10449,-12733,-1818,-180,-11,
 -7, -107,-1368,-10449, 12733, 1818, 180, 11, 420,  200, 164,
  0,   72,  608,  1465, 23979, 2600, 671, 63,
  7,   94, 1305, 10265,-13818,-2004,-207,-12,
 -7,  -94,-1305,-10265, 13818, 2004, 207, 12, 380,  297, 220,
  0,   76,  606,  1256, 24718, 2825, 693, 63,
  6,   81, 1232, 10016,-14908,-2192,-236,-14,
 -6,  -81,-1232,-10016, 14908, 2192, 236, 14, 342,  392, 262,
  0,   78,  597,  1007, 25359, 3033, 712, 63,
  6,   68, 1150,  9706,-15995,-2380,-267,-15,
 -6,  -68,-1150, -9706, 15995, 2380, 267, 15, 307,  483, 289,
  0,   80,  580,   719, 25901, 3224, 726, 62,
  6,   54, 1060,  9343,-17072,-2565,-299,-17,
 -6,  -54,-1060, -9343, 17072, 2565, 299, 17, 274,  569, 304,
 -1,   82,  555,   391, 26339, 3395, 735, 61,
  5,   40,  963,  8930,-18131,-2747,-332,-19,
 -5,  -40, -963, -8930, 18131, 2747, 332, 19, 242,  650, 307,
 -1,   83,  523,    26, 26672, 3545, 740, 60,
  5,   27,  861,  8474,-19164,-2923,-366,-21,
 -5,  -27, -861, -8474, 19164, 2923, 366, 21, 212,  724, 300,
 -1,   83,  482,  -376, 26900, 3672, 739, 58,
  4,   14,  756,  7981,-20163,-3092,-401,-24,
 -4,  -14, -756, -7981, 20163, 3092, 401, 24, 183,  792, 283,
 -1,   82,  433,  -812, 27022, 3776, 735, 56,
  4,    1,  648,  7456,-21122,-3250,-435,-26,
 -4,   -1, -648, -7456, 21122, 3250, 435, 26, 155,  851, 258,
 -1,   81,  376, -1281, 27038, 3855, 726, 54,
  3,  -11,  539,  6907,-22032,-3397,-470,-28,
 -3,   11, -539, -6907, 22032, 3397, 470, 28, 128,  903, 226,
 -1,   78,  312, -1778, 26951, 3910, 713, 52,
  3,  -22,  430,  6338,-22887,-3530,-503,-31,
 -3,   22, -430, -6338, 22887, 3530, 503, 31, 102,  946, 188,
 -2,   75,  239, -2302, 26761, 3941, 696, 49,
  3,  -33,  322,  5757,-23678,-3648,-537,-34,
 -3,   33, -322, -5757, 23678, 3648, 537, 34,  76,  980, 145,
 -2,   70,  160, -2848, 26472, 3948, 676, 47,
  3,  -42,  217,  5167,-24399,-3749,-568,-36,
 -3,   42, -217, -5167, 24399, 3749, 568, 36,  50, 1004,  99,
 -2,   65,   74, -3412, 26087, 3931, 653, 44,
  2,  -51,  115,  4577,-25045,-3830,-599,-39,
 -2,   51, -115, -4577, 25045, 3830, 599, 39,  25, 1019,  50,

 25610,3891,627,42,-3990,-18,58,-2,
 21226,-21226,10604,-10604,1860,-1860,1458,-1458,576,-576,130,-130,60,-60,8,-8
};

static const int16_t win[18][4] = {
  { -3072, -134, -146, 3352 },
  { -2747, -362, -471, 3579 },
  { -2387, -529, -831, 3747 },
  { -2004, -632,-1214, 3850 },
  { -1609, -666,-1609, 3884 },
  { -1214, -632,-2004, 3850 },
  {  -831, -529,-2387, 3747 },
  {  -471, -362,-2747, 3579 },
  {  -146, -134,-3072, 3352 },
  {   134,-3072,-3352, -146 },
  {   362,-2747,-3579, -471 },
  {   529,-2387,-3747, -831 },
  {   632,-2004,-3850,-1214 },
  {   666,-1609,-3884,-1609 },
  {   632,-1214,-3850,-2004 },
  {   529, -831,-3747,-2387 },
  {   362, -471,-3579,-2747 },
  {   134, -146,-3352,-3072 } };
  
static char* mp3_enc_err[] = {
  /* 0 */ "",
  /* 1 */ "Cannot open file.",
  /* 2 */ "'RIFF' missing.",
  /* 3 */ "'WAVE' missing.",
  /* 4 */ "'fmt ' missing.",
  /* 5 */ "Linear PCM required.",
  /* 6 */ "16 bit per sample required.",
  /* 7 */ "<=2 channels required.",
  /* 8 */ "'data' missing.",
  /* 9 */ "Samplerate not supported."
};

static const char* wav_filename;
static int         mp3file, wavfile, wav_size, frames;
static void        *enc_buffer;
static size_t      enc_buffer_size;
static int         enc_chunk = 0;     /* encode chunk counter    */
static int         enc_size;
static config_t    cfg;
static uint8_t     band_scale_f[22];


/* forward declarations */
static int  HuffmanCode( short *ix, char *xr_sign, uint32_t begin, uint32_t end, int table);
static int  HuffmanCod1( short *ix, char *xr_sign, uint32_t begin, uint32_t end, int table);
static void putbits(uint32_t val, uint32_t nbit);
static int  find_best_2( short *ix, uint32_t start, uint32_t end, const uint32_t *table,
                          uint32_t len, int *bits);
static int  find_best_3( short *ix, uint32_t start, uint32_t end, const uint32_t *table,
                         uint32_t len, int *bits);
static int  count_bit1 ( short *ix, uint32_t start, uint32_t end, int *bits );
static int  count_bigv ( short *ix, uint32_t start, uint32_t end, int table0, int table1,
                  int *bits);


static bool checkString(int fd, char *string)
{
  char temp[4];

  rb->read(fd, temp, 4);

  /* return 1 on match, 0 on no match */
  return !rb->memcmp(temp, string, 4);
}

static int Read16BitsLowHigh(int fd)
{
  char first, second;

  rb->read(fd, &first,  1);
  rb->read(fd, &second, 1);

  return ((int)second << 8) | (first & 0xff);
}


static int Read32BitsLowHigh(int fd)
{
  int first  = 0xffff & Read16BitsLowHigh(fd);
  int second = 0xffff & Read16BitsLowHigh(fd);

  return (second << 16) + first;
}

static int wave_open(void)
{
  unsigned short  wFormatTag;
  /* rockbox: comment 'set but unused" variable
  unsigned long   dAvgBytesPerSec;
  unsigned short  wBlockAlign;
  */
  unsigned short  bits_per_samp;
  long            header_size;

  if((wavfile = rb->open(wav_filename, O_RDONLY)) < 0)
    return -1;
  
  if(!checkString(wavfile,"RIFF")) return -2;
  Read32BitsLowHigh(wavfile); /* complete wave chunk size */
  if(!checkString(wavfile,"WAVE")) return -3;
  if(!checkString(wavfile,"fmt ")) return -4;
  
  header_size = Read32BitsLowHigh(wavfile); /* chunk size */
  wFormatTag  = Read16BitsLowHigh(wavfile);
  
  cfg.channels    = Read16BitsLowHigh(wavfile);
  cfg.samplerate  = Read32BitsLowHigh(wavfile);
  /*dAvgBytesPerSec*/ Read32BitsLowHigh(wavfile);
  /*wBlockAlign    */ Read16BitsLowHigh(wavfile);
  bits_per_samp   = Read16BitsLowHigh(wavfile);
  
  if(wFormatTag != 0x0001)         return -5; /* linear PCM required */
  if(bits_per_samp != 16)          return -6; /* 16 bps required */
  if(cfg.channels > 2)             return -7; /* <=2 channels required */
  if(!checkString(wavfile,"data")) return -8;

  /* Sample rates != 16/22.05/24/32/44.1/48 kHz are not supported. */
  if((cfg.samplerate != 16000) && (cfg.samplerate != 22050) &&
     (cfg.samplerate != 24000) && (cfg.samplerate != 32000) &&
     (cfg.samplerate != 44100) && (cfg.samplerate != 48000))    return -9;
  
  header_size = 0x28;
  wav_size = rb->filesize(wavfile);
  rb->lseek(wavfile, header_size, SEEK_SET);
  
  return 0;
}

static int read_samples(uint16_t *buffer, int num_samples)
{
  uint16_t tmpbuf[MAX_SAMP_PER_FRAME*2]; /*  SAMP_PER_FRAME*MAX_CHANNELS */
  int byte_per_sample = cfg.channels * 2; /* requires bits_per_sample==16 */
  int s, samples = rb->read(wavfile, tmpbuf, byte_per_sample * num_samples) / byte_per_sample;
  /* Pad last sample with zeros */
  memset(tmpbuf + samples*cfg.channels, 0, (num_samples-samples)*cfg.channels);

  if (cfg.channels==1)
  {
    /* interleave the mono samples to stereo as required by encoder */
    for(s=0; s<num_samples; s++)
        buffer[2*s] = tmpbuf[s];
  }
  else
  {
    /* interleaving is correct for stereo */
    memcpy(buffer, tmpbuf, sizeof(tmpbuf));
  }

  return samples;
}

static inline uint32_t myswap32(uint32_t val)
{
  const uint8_t* v = (const uint8_t*)&val;

  return ((uint32_t)v[0]<<24) | ((uint32_t)v[1]<<16) | ((uint32_t)v[2]<<8) | v[3];
}

static void encodeSideInfo( side_info_t si[2][2] )
{
  int gr, ch, header;
  uint32_t  cc=0, sz=0;
  
  /*
   * MPEG header layout:
   * AAAAAAAA AAABBCCD EEEEFFGH IIJJKLMM
   * A (31-21) = frame sync
   * B (20-19) = MPEG type
   * C (18-17) = MPEG layer
   * D (16)    = protection bit
   * E (15-12) = bitrate index
   * F (11-10) = samplerate index
   * G (9)     = padding bit
   * H (8)     = private bit
   * I (7-6)   = channel mode
   * J (5-4)   = mode extension (jstereo only)
   * K (3)     = copyright bit
   * L (2)     = original
   * M (1-0)   = emphasis
   */

  header  = (0xfff00000) | /* frame sync (AAAAAAAAA AAA)
                              mp3 type (upper):  1 (B)  */
            (0x01 << 17) | /* mp3 layer:        01 (CC) */
            ( 0x1 << 16) | /* mp3 crc:           1 (D)  */
            ( 0x1 <<  2);  /* mp3 org:           1 (L)  */
  header |= cfg.mpg.type    << 19;
  header |= cfg.mpg.bitr_id << 12;
  header |= cfg.mpg.smpl_id << 10;
  header |= cfg.mpg.padding <<  9;
  header |= cfg.mpg.mode    <<  6;
  /* no emphasis (bits 0-1) */
  putbits( header, 32 );

  if(cfg.mpg.type == 1)
  { /* MPEG1 */
    if(cfg.channels == 2)  { putlong( 0, 20); }
    else                   { putlong( 0, 18); }

    for(gr=0; gr<cfg.granules; gr++)
      for(ch=0; ch<cfg.channels; ch++)
      {
        side_info_t *gi = &si[gr][ch];

        putlong((gi->part2_3_length+42),12 ); /* add scale_facs array size */
        putlong( gi->address3>>1,        9 );
        putlong( gi->global_gain,        8 );
        putlong( 9,                      4 ); /* set scale_facs compr type */
        putlong( gi->table_select[0],    6 );
        putlong( gi->table_select[1],    5 );
        putlong( gi->table_select[2],    5 );
        putlong( gi->region_0_1,         7 );
        putlong( 1                  ,    2 ); /* set scale_facs to 1bit */
        putlong( gi->table_select[3],    1 );
      }
  }
  else
  { /* MPEG2 */
    if(cfg.channels == 2)  { putlong( 0, 10); }
    else                   { putlong( 0,  9); }

    for(ch=0; ch<cfg.channels; ch++)
    {
      side_info_t *gi = &si[0][ch];

      putlong((gi->part2_3_length+42),12 ); /* add scale_facs array size */
      putlong( gi->address3>>1,        9 );
      putlong( gi->global_gain,        8 );
      putlong( 0xCA,                   9 ); /* set scale_facs compr type */
      putlong( gi->table_select[0],    6 );
      putlong( gi->table_select[1],    5 );
      putlong( gi->table_select[2],    5 );
      putlong( gi->region_0_1     ,    7 );
      putlong( 1                  ,    1 ); /* set scale_facs to 1bit */
      putlong( gi->table_select[3],    1 );
    }
  }
  /* flush remaining bits */
  putbits(cc, sz);
}

/* Note the discussion of huffmancodebits() on pages 28 and 29 of the IS,
   as well as the definitions of the side information on pages 26 and 27. */
static void Huffmancodebits( short *ix, char *xr_sign, side_info_t *gi )
{
  int    region1   = gi->address1;
  int    region2   = gi->address2;
  int    bigvals   = gi->address3;
  int    count1    = bigvals + (gi->count1 << 2);
  int    stuffBits = 0;
  int    bits      = 0;
  int    i, v;

  for(i=v=0; i<32; i+=2)
    v |= band_scale_f[i>>1] << (30-i);
  putbits(v, 32); // store scale_facs (part1)

  for(v=0; i<42; i+=2)
    v |= band_scale_f[i>>1] << (40-i);
  putbits(v, 10); // store scale_facs (part2)

  if(region1 > 0)
    bits += HuffmanCode(ix, xr_sign,   0    , region1, gi->table_select[0]);

  if(region2 > region1)
    bits += HuffmanCode(ix, xr_sign, region1, region2, gi->table_select[1]);

  if(bigvals > region2)
    bits += HuffmanCode(ix, xr_sign, region2, bigvals, gi->table_select[2]);
 
  if(count1 > bigvals)
    bits += HuffmanCod1(ix, xr_sign, bigvals,  count1, gi->table_select[3]);

  if((stuffBits = gi->part2_3_length - bits) > 0)
  {
    int stuffWords = stuffBits >> 5;
    int remainBits = stuffBits & 31;

    if( remainBits )
      putbits( ~0, remainBits );

    while( stuffWords-- )
      putbits( ~0, 32 ); /* Huffman code tables leed to padding ones */
  }
}

int HuffmanCod1( short *ix, char *xr_sign, uint32_t begin, uint32_t end, int tbl)
{
  uint32_t  cc=0, sz=0;
  uint32_t  i, d, p;
  int     sumbit=0, s=0, l=0, v, w, x, y;
  #define sgnv xr_sign[i+0]
  #define sgnw xr_sign[i+1]
  #define sgnx xr_sign[i+2]
  #define sgny xr_sign[i+3]

  for(i=begin; i<end; i+=4)
  {
    v = ix[i+0];
    w = ix[i+1];
    x = ix[i+2];
    y = ix[i+3];
    p = (v << 3) + (w << 2) + (x << 1) + y;

    switch(p)
    {
      case  0: l=0; s = 0; break;
      case  1: l=1; s =                                           sgny; break;
      case  2: l=1; s =                              sgnx;              break;
      case  3: l=2; s =                             (sgnx << 1) + sgny; break;
      case  4: l=1; s =                sgnw;                            break;
      case  5: l=2; s =               (sgnw << 1)               + sgny; break;
      case  6: l=2; s =               (sgnw << 1) +  sgnx;              break;
      case  7: l=3; s =               (sgnw << 2) + (sgnx << 1) + sgny; break;
      case  8: l=1; s =  sgnv;                                          break;
      case  9: l=2; s = (sgnv << 1)                             + sgny; break;
      case 10: l=2; s = (sgnv << 1)               +  sgnx;              break;
      case 11: l=3; s = (sgnv << 2)               + (sgnx << 1) + sgny; break;
      case 12: l=2; s = (sgnv << 1) +  sgnw;                            break;
      case 13: l=3; s = (sgnv << 2) + (sgnw << 1)               + sgny; break;
      case 14: l=3; s = (sgnv << 2) + (sgnw << 1) +  sgnx;              break;
      case 15: l=4; s = (sgnv << 3) + (sgnw << 2) + (sgnx << 1) + sgny; break;
    }

    d = (ht_count[tbl][0][p] << l) + s;
    l =  ht_count[tbl][1][p];
    putlong( d, l );
    sumbit += l;
  }

  /* flush remaining bits */
  putbits(cc, sz);

  return sumbit;
}

/* Implements the pseudocode of page 98 of the IS */
int HuffmanCode(short *ix, char *xr_sign, uint32_t begin, uint32_t end, int table)
{
  uint32_t       cc=0, sz=0, code;
  uint32_t       i, xl=0, yl=0, idx;
  int            x, y, bit, sumbit=0;
  #define sign_x xr_sign[i+0]
  #define sign_y xr_sign[i+1]

  if(table == 0)
    return 0;

  if( table > 15 )
  { /* ESC-table is used */
    uint32_t  linbits = ht_big[table-16].linbits;
    const uint16_t *hffcode = table < 24 ? t16HB : t24HB;
    const uint8_t  *hlen    = table < 24 ? t16l  : t24l;

    for(i=begin; i<end; i+=2)
    {
      x = ix[ i ];
      y = ix[i+1];

      if(x > 14) { xl = x - 15;  x = 15; }
      if(y > 14) { yl = y - 15;  y = 15; }

      idx  = x * 16 + y;
      code = hffcode[idx];
      bit  = hlen   [idx];

      if(x)
      {
        if(x > 14)
        {
          code = (code << linbits) | xl;
          bit += linbits;
        }

        code = (code << 1) | sign_x;
        bit += 1;
      }

      if(y)
      {
        if(y > 14)
        {
          if(bit + linbits + 1 > 32)
          {
            putlong( code, bit );
            sumbit += bit;
            code = bit = 0;
          }

          code = (code << linbits) | yl;
          bit += linbits;
        }

        code = (code << 1) | sign_y;
        bit += 1;
      }

      putlong( code, bit );
      sumbit += bit;
    }
  }
  else
  { /* No ESC-words */
    const struct huffcodetab *h = &ht[table];

    for(i=begin; i<end; i+=2)
    {
      x = ix[i];
      y = ix[i+1];

      idx  = x * h->len + y;
      code = h->table[idx];
      bit  = h->hlen [idx];

      if(x)
      {
        code = (code << 1) | sign_x;
        bit += 1;
      }

      if(y)
      {
        code = (code << 1) | sign_y;
        bit += 1;
      }

      putlong( code, bit );
      sumbit += bit;
    }
  }

  /* flush remaining bits */
  putbits(cc, sz);

  return sumbit;
}

void putbits(uint32_t val, uint32_t nbit)
{
  int new_bitpos = CodedData.bitpos + nbit;
  int ptrpos     = CodedData.bitpos >> 5;

  val = val & (0xffffffff >> (32 - nbit));

  /* data fit in one uint32_t */
  if(((new_bitpos - 1) >> 5) == ptrpos)
    CodedData.bbuf[ptrpos] |= val << ((32 - new_bitpos) & 31);
  else
  {
    CodedData.bbuf[ptrpos  ] |= val >> ((new_bitpos - 32) & 31);
    CodedData.bbuf[ptrpos+1] |= val << ((32 - new_bitpos) & 31);
  }

  CodedData.bitpos = new_bitpos;
}

/***************************************************************************/
/*  Choose the Huffman table that will encode ix[begin..end] with          */
/*  the fewest bits.                                                       */
/*  Note: This code contains knowledge about the sizes and characteristic  */
/*  of the Huffman tables as defined in the IS (Table B.7), and will not   */
/*  work with any arbitrary tables.                                        */
/***************************************************************************/
static int choose_table( short *ix, uint32_t begin, uint32_t end, int *bits )
{
  uint32_t i;
  int    max, table0, table1;
  
  for(i=begin,max=0; i<end; i++)
    if(ix[i] > max)
      max = ix[i];

  if(max < 16)
  {
    /* tables without linbits */
    /* indx: 0  1  2  3  4  5  6  7  8  9 10 11 12  13 14  15 */
    /*  len: 0, 2, 3, 3, 0, 4, 4, 6, 6, 6, 8, 8, 8, 16, 0, 16 */
    switch(max)
    {
      case 0:  return  0;
      case 1:  return       count_bit1(ix, begin, end, bits);
      case 2:  return  2 + find_best_2(ix, begin, end, tab23, 3, bits);
      case 3:  return  5 + find_best_2(ix, begin, end, tab56, 4, bits);
      case 4:
      case 5:  return  7 + find_best_3(ix, begin, end, tab789, 6, bits);
      case 6:
      case 7:  return 10 + find_best_3(ix, begin, end, tabABC, 8, bits);
      default: return 13 + find_best_2(ix, begin, end, tab1315, 16, bits) * 2;
    }
  }
  else
  {
    /* tables with linbits */
    max -= 15;

    for(table0=0; table0<8; table0++)
      if(ht_big[table0].linmax >= max)
        break;

    for(table1=8; table1<16; table1++)
      if(ht_big[table1].linmax >= max)
        break;

    return 16 + count_bigv(ix, begin, end, table0, table1, bits);
  }
}

int find_best_2(short *ix, uint32_t start, uint32_t end, const uint32_t *table,
                uint32_t len, int *bits)
{
  uint32_t i, sum = 0;

  for(i=start; i<end; i+=2)
    sum += table[ix[i] * len + ix[i+1]];

  if((sum & 0xffff) <= (sum >> 16))
  {
    *bits = (sum & 0xffff);
    return 1;
  }
  else
  {
    *bits = sum >> 16;
    return 0;
  }
}

int find_best_3(short *ix, uint32_t start, uint32_t end, const uint32_t *table,
                uint32_t len, int *bits)
{
  uint32_t i, j, sum  = 0;
  int          sum1 = 0;
  int          sum2 = 0;
  int          sum3 = 0;

  /* avoid overflow in packed additions: 78*13 < 1024 */
  for(i=start; i<end; )
  {
    j = i + 2*78 > end ? end : i + 2*78;

    for(sum=0; i<j; i+=2)
      sum += table[ix[i] * len + ix[i+1]];

    sum1 += (sum >> 20);
    sum2 += (sum >> 10) & 0x3ff;
    sum3 += (sum >>  0) & 0x3ff;
  }

  i = 0;
  if(sum1 > sum2) { sum1 = sum2;  i = 1; }
  if(sum1 > sum3) { sum1 = sum3;  i = 2; }

  *bits = sum1;

  return i;
}

/*************************************************************************/
/* Function: Count the number of bits necessary to code the subregion.   */
/*************************************************************************/
int count_bit1(short *ix, uint32_t start, uint32_t end, int *bits )
{
  uint32_t i, sum = 0;

  for(i=start; i<end; i+=2)
    sum += t1l[4 + ix[i] * 2 + ix[i+1]];

  *bits = sum;

  return 1; /* this is table1 */
}

int count_bigv(short *ix, uint32_t start, uint32_t end, int table0,
               int table1, int *bits )
{
  uint32_t  i, sum0, sum1, sum=0, bigv=0, x, y;

  /* ESC-table is used */
  for(i=start; i<end; i+=2)
  {
    x = ix[i];
    y = ix[i+1];

    if(x > 14) { x = 15; bigv++; }
    if(y > 14) { y = 15; bigv++; }

    sum += tab1624[x * 16 + y];
  }

  sum0 = (sum  >>  16)  + bigv * ht_big[table0].linbits;
  sum1 = (sum & 0xffff) + bigv * ht_big[table1].linbits;

  if(sum0 <= sum1)
  {
    *bits = sum0;
    return table0;
  }
  else
  {
    *bits = sum1;
    return table1;
  }
}

/*************************************************************************/
/* Function: Calculation of rzero, count1, address3                      */
/* (Partitions ix into big values, quadruples and zeros).                */
/*************************************************************************/
static int calc_runlen( short *ix, side_info_t *si )
{
  int  p, i, sum = 0;

  for(i=SAMPL2; i-=2; )
    if(*(uint32_t*)&ix[i-2]) /* !!!! short *ix; !!!!! */
      break;

  si->count1 = 0;

  for( ; i>3; i-=4)
  {
    int v = ix[i-1];
    int w = ix[i-2];
    int x = ix[i-3];
    int y = ix[i-4];
    
    if((v | w | x | y) <= 1)
    {
      p = (y<<3) + (x<<2) + (w<<1) + (v);

      sum += tab01[p];

      si->count1++;
    }
    else break;
  }

  si->address3 = i;

  if((sum >> 16) < (sum & 0xffff))
  {
    si->table_select[3] = 0;
    return sum >> 16;
  }
  else
  {
    si->table_select[3] = 1;
    return sum & 0xffff;
  }
}


/*************************************************************************/
/*   Function: Quantization of the vector xr ( -> ix)                    */
/*************************************************************************/
static int quantize_int(int *xr, short *ix, side_info_t *si)
{
  unsigned int i, idx, s, frac_pow[] = { 0x10000, 0xd745, 0xb505, 0x9838 };

  s = frac_pow[si->quantStep & 3] >> si->quantStep / 4;

  /* check for possible 'out of range' values */
  if(((si->max_val + 256) >> 8) * s >= (65536 << 8))
    return 0;

  if(((si->max_val + 256) >> 8) * s < (4096 << 8))
  { /* all values fit the table size */
    for(i=SAMPL2; i--; )
      ix[i] = int2idx[(xr[i] * s + 0x8000) >> 16];
  }
  else
  { /* check each index wether it fits the table */
    for(i=SAMPL2; i--; )
    {
      idx = (xr[i] * s + 0x08000) >> 16;

      if(idx > 4095)  ix[i] = int2idx[(idx + 8) >> 4] << 3;
      else            ix[i] = int2idx[idx];
    }
  }

  return 1;
}

/*************************************************************************/
/* subdivides the bigvalue region which will use separate Huffman tables */
/*************************************************************************/
static void subdivide(side_info_t *si)
{
  int scfb, count0, count1;
  
  if( !si->address3 )
  { /* no bigvalue region */
    si->region_0_1 = 0;
    si->address1   = 0;
    si->address2   = 0;
  }
  else
  {
    /* Calculate scale factor band index */
    for(scfb=0; scalefac[scfb] < si->address3; )
      scfb++;

    count0 = subdv_table[scfb].region0_cnt;
    count1 = subdv_table[scfb].region1_cnt;

    si->region_0_1 = (count0 << 3) | count1;
    si->address1   = scalefac[count0 + 1];
    si->address2   = scalefac[count0 + 1 + count1 + 1];
  }
}

/*******************************************************************/
/* Count the number of bits necessary to code the bigvalues region */
/*******************************************************************/
static int bigv_bitcount(short *ix, side_info_t *gi)
{
  int b1=0, b2=0, b3=0;

  /* Select huffman code tables for bigvalues regions */
  gi->table_select[0] = 0;
  gi->table_select[1] = 0;
  gi->table_select[2] = 0;

  if( gi->address1 > 0 )            /* region0 */
    gi->table_select[0] = choose_table(ix, 0           , gi->address1, &b1);

  if( gi->address2 > gi->address1 ) /* region1 */
    gi->table_select[1] = choose_table(ix, gi->address1, gi->address2, &b2);

  if( gi->address3 > gi->address2 ) /* region2 */
    gi->table_select[2] = choose_table(ix, gi->address2, gi->address3, &b3);

  return b1+b2+b3;
}

static int quantize_and_count_bits(int *xr, short *ix, side_info_t *si)
{
  int bits = 10000;

  if(quantize_int(xr, ix, si))
  {
    bits = calc_runlen(ix, si);      /* rzero,count1,address3  */
    subdivide(si);                   /* bigvalues sfb division */
    bits += bigv_bitcount(ix,si);    /* bit count */
  }

  return bits;
}

/************************************************************************/
/* The code selects the best quantStep for a particular set of scalefacs*/
/************************************************************************/ 
static int inner_loop(int *xr, int max_bits, side_info_t *si)
{
  int bits;

  while((bits=quantize_and_count_bits(xr, enc_data, si)) < max_bits-64)
  {
    if(si->quantStep == 0)
      break;

    if(si->quantStep <= 2)
      si->quantStep  = 0;
    else
      si->quantStep -= 2;
  }

  while(bits > max_bits)
  {
    si->quantStep++;
    bits = quantize_and_count_bits(xr, enc_data, si);
  }

  return bits;
}

static void iteration_loop(int *xr, side_info_t *si, int gr_cnt)
{
  int remain, tar_bits, max_bits = cfg.mean_bits;

  /* distribute reserved bits to remaining granules */
  tar_bits = max_bits + (cfg.ResvSize / gr_cnt & ~7);
  if(tar_bits > max_bits + max_bits/2)
    tar_bits = max_bits + max_bits/2;

  si->part2_3_length = inner_loop(xr, tar_bits, si);
  si->global_gain    = si->quantStep + 142 - si->additStep;

  /* unused bits of the reservoir can be used for remaining granules */
  cfg.ResvSize += max_bits - si->part2_3_length;

  /* end: distribute the reserved bits to one or two granules */
  if(gr_cnt == 1)
  {
    si->part2_3_length += cfg.ResvSize;
    /* mp3 format allows max 12bits for granule length */
    if(si->part2_3_length > 4092)
    {
      remain = (si->part2_3_length - 4092 + 31) >> 5;
      si->part2_3_length    -= remain << 5;
      si[-1].part2_3_length += remain << 5;

      while(remain--)
        putbits(~0, 32);
    }
  }
}


/* returns sum_j=0^31 a[j]*cos(PI*j*(k+1/2)/32), 0<=k<32 */
void window_subband1(short *wk, int sb0[SBLIMIT], int sb1[SBLIMIT]) ICODE_ATTR;
void window_subband1(short *wk, int sb0[SBLIMIT], int sb1[SBLIMIT])
{
  int   k, i, u, v;
  short *x1, *x2;
  short const *wp;

#ifdef CPU_COLDFIRE
  int s0, s1, t0, t1;

  for(k=0; k<18; k++, wk+=64, sb0+=SBLIMIT, sb1+=SBLIMIT)
  {
    wp = enwindow;
    x1 = wk;
    x2 = x1 - 124;

    for(i=-15; i<0; i++)
    {
      asm volatile(
      "move.l (-224*4,%[x2]), %%d4\n"   /* d4 = x2[-224] */
      "movem.l (%[wp]), %%d0-%%d3\n"    /* load 8 values */
      "mac.w %%d0u, %%d4u,                       %%acc0\n"
      "mac.w %%d0u, %%d4l, (-160*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d0l, %%d4u,                       %%acc0\n"
      "mac.w %%d0l, %%d4l, ( -96*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d1u, %%d4u,                       %%acc0\n"
      "mac.w %%d1u, %%d4l, ( -32*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d1l, %%d4u,                       %%acc0\n"
      "mac.w %%d1l, %%d4l, (  32*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d2u, %%d4u,                       %%acc0\n"
      "mac.w %%d2u, %%d4l, (  96*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d2l, %%d4u,                       %%acc0\n"
      "mac.w %%d2l, %%d4l, ( 160*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d3u, %%d4u,                       %%acc0\n"
      "mac.w %%d3u, %%d4l, ( 224*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d3l, %%d4u,                       %%acc0\n"
      "mac.w %%d3l, %%d4l, (-256*4,%[x1]), %%d4, %%acc1\n"
      "movem.l (16,%[wp]), %%d0-%%d3\n" /* load 8 values */
      "mac.w %%d0u, %%d4u,                       %%acc0\n"
      "mac.w %%d0u, %%d4l, (-192*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d0l, %%d4u,                       %%acc0\n"
      "mac.w %%d0l, %%d4l, (-128*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d1u, %%d4u,                       %%acc0\n"
      "mac.w %%d1u, %%d4l, ( -64*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d1l, %%d4u,                       %%acc0\n"
      "mac.w %%d1l, %%d4l, (   0*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d2u, %%d4u,                       %%acc0\n"
      "mac.w %%d2u, %%d4l, (  64*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d2l, %%d4u,                       %%acc0\n"
      "mac.w %%d2l, %%d4l, ( 128*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d3u, %%d4u,                       %%acc0\n"
      "mac.w %%d3u, %%d4l, ( 192*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d3l, %%d4u,                       %%acc0\n"
      "mac.w %%d3l, %%d4l, ( 224*4,%[x1]), %%d4, %%acc1\n"
      "movclr.l %%acc0, %%d0\n"
      "move.l %%d0, %[s0]\n"
      "movclr.l %%acc1, %%d0\n"
      "move.l %%d0, %[s1]\n"

      "movem.l (%[wp]), %%d0-%%d3\n"    /* load 8 values */
      "mac.w %%d0u, %%d4u,                       %%acc0\n"
      "mac.w %%d0u, %%d4l, ( 160*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d0l, %%d4u,                       %%acc0\n"
      "mac.w %%d0l, %%d4l, (  96*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d1u, %%d4u,                       %%acc0\n"
      "mac.w %%d1u, %%d4l, (  32*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d1l, %%d4u,                       %%acc0\n"
      "mac.w %%d1l, %%d4l, ( -32*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d2u, %%d4u,                       %%acc0\n"
      "mac.w %%d2u, %%d4l, ( -96*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d2l, %%d4u,                       %%acc0\n"
      "mac.w %%d2l, %%d4l, (-160*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d3u, %%d4u,                       %%acc0\n"
      "mac.w %%d3u, %%d4l, (-224*4,%[x1]), %%d4, %%acc1\n"
      "mac.w %%d3l, %%d4u,                       %%acc0\n"
      "mac.w %%d3l, %%d4l, ( 256*4,%[x2]), %%d4, %%acc1\n"
      "movem.l (32,%[wp]), %%d0-%%d3\n"  /* load 8 values */
      "mac.w %%d0u, %%d4u,                       %%acc0\n"
      "mac.w %%d0u, %%d4l, ( 192*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d0l, %%d4u,                       %%acc0\n"
      "mac.w %%d0l, %%d4l, ( 128*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d1u, %%d4u,                       %%acc0\n"
      "mac.w %%d1u, %%d4l, (  64*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d1l, %%d4u,                       %%acc0\n"
      "mac.w %%d1l, %%d4l, (   0*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d2u, %%d4u,                       %%acc0\n"
      "mac.w %%d2u, %%d4l, ( -64*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d2l, %%d4u,                       %%acc0\n"
      "mac.w %%d2l, %%d4l, (-128*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d3u, %%d4u,                       %%acc0\n"
      "mac.w %%d3u, %%d4l, (-192*4,%[x2]), %%d4, %%acc1\n"
      "mac.w %%d3l, %%d4u,                       %%acc0\n"
      "mac.w %%d3l, %%d4l,                       %%acc1\n"
      "movclr.l %%acc0, %%d0\n"
      "move.l %%d0, %[t0]\n"
      "movclr.l %%acc1, %%d0\n"
      "move.l %%d0, %[t1]\n"

      : [x1] "+a" (x1), [x2] "+a" (x2), [s0] "+m" (s0), [t0] "+m" (t0),
                                        [s1] "+m" (s1), [t1] "+m" (t1)
      : [wp] "a" (wp) : "d0", "d1", "d2", "d3", "d4");

      sb0[30+i*2] =  shft4(t0)          + shft13(s0) * wp[24];
      sb0[31+i*2] = shft13(t0) * wp[25] - shft13(s0) * wp[26];
      sb1[30+i*2] =  shft4(t1)          + shft13(s1) * wp[24];
      sb1[31+i*2] = shft13(t1) * wp[25] - shft13(s1) * wp[26];
      wp += 27;
      x1 -=  2;
      x2 +=  2;
    }

    asm volatile(
    "move.l ( -32*4,%[x1]), %%d4\n"   /* d4 = x1[-32] */
    "movem.l (%[wp]), %%d0-%%d3\n" /* load 8 values */

    "mac.w %%d0u, %%d4u,                       %%acc0\n"
    "mac.w %%d0u, %%d4l, ( -96*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d0l, %%d4u,                       %%acc0\n"
    "mac.w %%d0l, %%d4l, (-160*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d1u, %%d4u,                       %%acc0\n"
    "mac.w %%d1u, %%d4l, (-224*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d1l, %%d4u,                       %%acc0\n"
    "mac.w %%d1l, %%d4l, (  32*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d2u, %%d4u,                       %%acc0\n"
    "mac.w %%d2u, %%d4l, (  96*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d2l, %%d4u,                       %%acc0\n"
    "mac.w %%d2l, %%d4l, ( 160*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d3u, %%d4u,                       %%acc0\n"
    "mac.w %%d3u, %%d4l, ( 224*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d3l, %%d4u,                       %%acc0\n"
    "mac.w %%d3l, %%d4l, ( -16*4,%[x1]), %%d4, %%acc1\n"
    "movclr.l %%acc0, %%d0\n"
    "move.l %%d0, %[s0]\n"
    "movclr.l %%acc1, %%d0\n"
    "move.l %%d0, %[s1]\n"

    "movem.l (16,%[wp]), %%d0-%%d3\n" /* load 8 values */
    "mac.w %%d0u, %%d4u,                       %%acc0\n"
    "mac.w %%d0u, %%d4l, ( -48*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d1u, %%d4u,                       %%acc0\n"
    "mac.w %%d1u, %%d4l, (  16*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d1l, %%d4u,                       %%acc0\n"
    "mac.w %%d1l, %%d4l, ( -80*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d2u, %%d4u,                       %%acc0\n"
    "mac.w %%d2u, %%d4l, (  48*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d2u, %%d4u,                       %%acc0\n"
    "mac.w %%d2u, %%d4l, (-112*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d3u, %%d4u,                       %%acc0\n"
    "mac.w %%d3u, %%d4l, (  80*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d3l, %%d4u,                       %%acc0\n"
    "mac.w %%d3l, %%d4l, (-144*4,%[x1]), %%d4, %%acc1\n"
    "movem.l (32,%[wp]), %%d0-%%d3\n" /* load 8 values */
    "mac.w %%d0u, %%d4u,                       %%acc0\n"
    "mac.w %%d0u, %%d4l, ( 112*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d0u, %%d4u,                       %%acc0\n"
    "mac.w %%d0u, %%d4l, (-176*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d1u, %%d4u,                       %%acc0\n"
    "mac.w %%d1u, %%d4l, ( 144*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d1l, %%d4u,                       %%acc0\n"
    "mac.w %%d1l, %%d4l, (-208*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d2u, %%d4u,                       %%acc0\n"
    "mac.w %%d2u, %%d4l, ( 176*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d2u, %%d4u,                       %%acc0\n"
    "mac.w %%d2u, %%d4l, (-240*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d3u, %%d4u,                       %%acc0\n"
    "mac.w %%d3u, %%d4l, ( 208*4,%[x1]), %%d4, %%acc1\n"
    "mac.w %%d3l, %%d4u,                       %%acc0\n"
    "mac.w %%d3l, %%d4l,                       %%acc1\n"
    "movclr.l %%acc0, %%d0\n"
    "move.l %%d0, %[t0]\n"
    "movclr.l %%acc1, %%d0\n"
    "move.l %%d0, %[t1]\n"

    : [x1] "+a" (x1), [s0] "+m" (s0), [t0] "+m" (t0),
                      [s1] "+m" (s1), [t1] "+m" (t1)
    : [wp] "a" (wp) : "d0", "d1", "d2", "d3", "d4");

    u  = shft4(s0 - t0);
    v  = shft4(s0 + t0);
    t0 = sb0[14];
    s0 = sb0[15] - t0;

    sb0[31] = v + t0;   /* A0 */
    sb0[30] = u + s0;   /* A1 */
    sb0[15] = u - s0;   /* A2 */
    sb0[14] = v - t0;   /* A3 */

    u  = shft4(s1 - t1);
    v  = shft4(s1 + t1);
    t1 = sb1[14];
    s1 = sb1[15] - t1;

    sb1[31] = v + t1;   /* A0 */
    sb1[30] = u + s1;   /* A1 */
    sb1[15] = u - s1;   /* A2 */
    sb1[14] = v - t1;   /* A3 */
  }
#else
  int ch, s, t, *a;

  for(ch=0; ch<cfg.channels; ch++)
  {
    a = ch ? sb1 : sb0;
    for(k=0; k<18; k++, wk+=64, a+=SBLIMIT)
    {
      wp = enwindow;
      x1 = wk;
      x2 = x1 - 124;

      /* x1[-572] .... x1[448] = 1022 */
      /* 18*4*16*32 */
      for(i=-15; i<0; i++)
      {
        s  = (int)x2[-224*2] * wp[ 0];  t  = (int)x1[ 224*2] * wp[ 0];
        s += (int)x2[-160*2] * wp[ 1];  t += (int)x1[ 160*2] * wp[ 1];
        s += (int)x2[- 96*2] * wp[ 2];  t += (int)x1[  96*2] * wp[ 2];
        s += (int)x2[- 32*2] * wp[ 3];  t += (int)x1[  32*2] * wp[ 3];
        s += (int)x2[  32*2] * wp[ 4];  t += (int)x1[- 32*2] * wp[ 4];
        s += (int)x2[  96*2] * wp[ 5];  t += (int)x1[- 96*2] * wp[ 5];
        s += (int)x2[ 160*2] * wp[ 6];  t += (int)x1[-160*2] * wp[ 6];
        s += (int)x2[ 224*2] * wp[ 7];  t += (int)x1[-224*2] * wp[ 7];
        s += (int)x1[-256*2] * wp[ 8];  t += (int)x2[ 256*2] * wp[16];
        s += (int)x1[-192*2] * wp[ 9];  t += (int)x2[ 192*2] * wp[17];
        s += (int)x1[-128*2] * wp[10];  t += (int)x2[ 128*2] * wp[18];
        s += (int)x1[- 64*2] * wp[11];  t += (int)x2[  64*2] * wp[19];
        s += (int)x1[   0*2] * wp[12];  t += (int)x2[   0*2] * wp[20];
        s += (int)x1[  64*2] * wp[13];  t += (int)x2[- 64*2] * wp[21];
        s += (int)x1[ 128*2] * wp[14];  t += (int)x2[-128*2] * wp[22];
        s += (int)x1[ 192*2] * wp[15];  t += (int)x2[-192*2] * wp[23];

        a[30+i*2] =  shft4(t)          + shft13(s) * wp[24];
        a[31+i*2] = shft13(t) * wp[25] - shft13(s) * wp[26];
        wp += 27;
        x1 -=  2;
        x2 +=  2;
      }

      t  =  (int)x1[- 16*2]            * wp[ 8];  s  = (int)x1[ -32*2] * wp[0];
      t += ((int)x1[- 48*2]-x1[ 16*2]) * wp[10];  s += (int)x1[ -96*2] * wp[1];
      t += ((int)x1[- 80*2]+x1[ 48*2]) * wp[12];  s += (int)x1[-160*2] * wp[2];
      t += ((int)x1[-112*2]-x1[ 80*2]) * wp[14];  s += (int)x1[-224*2] * wp[3];
      t += ((int)x1[-144*2]+x1[112*2]) * wp[16];  s += (int)x1[  32*2] * wp[4];
      t += ((int)x1[-176*2]-x1[144*2]) * wp[18];  s += (int)x1[  96*2] * wp[5];
      t += ((int)x1[-208*2]+x1[176*2]) * wp[20];  s += (int)x1[ 160*2] * wp[6];
      t += ((int)x1[-240*2]-x1[208*2]) * wp[22];  s += (int)x1[ 224*2] * wp[7];

      u = shft4(s - t);
      v = shft4(s + t);
      t = a[14];
      s = a[15] - t;

      a[31] = v + t;   /* A0 */
      a[30] = u + s;   /* A1 */
      a[15] = u - s;   /* A2 */
      a[14] = v - t;   /* A3 */
    }
    wk -= 18 * 64 - 1; /* rewind wk (to next channel start) */
  }
#endif
}

void window_subband2(short *x1, int a[SBLIMIT]) ICODE_ATTR;
void window_subband2(short *x1, int a[SBLIMIT])
{
  int   xr;
  short const *wp = enwindow;
  short *x2 = x1 - 124;

  wp += 27 * 15;
  x1 -=  2 * 15;
  x2 +=  2 * 15;

  xr = a[28] - a[0];  a[0] += a[28];  a[28] = shft9(xr) * wp[-2*27+25];
  xr = a[29] - a[1];  a[1] += a[29];  a[29] = shft9(xr) * wp[-2*27+25];
  xr = a[26] - a[2];  a[2] += a[26];  a[26] = shft9(xr) * wp[-4*27+25];
  xr = a[27] - a[3];  a[3] += a[27];  a[27] = shft9(xr) * wp[-4*27+25];
  xr = a[24] - a[4];  a[4] += a[24];  a[24] = shft9(xr) * wp[-6*27+25];
  xr = a[25] - a[5];  a[5] += a[25];  a[25] = shft9(xr) * wp[-6*27+25];
  xr = a[22] - a[6];  a[6] += a[22];  a[22] = shft9(xr) * SQRT        ;
  xr = a[23] - a[7];  a[7] += a[23];  a[23] = shft9(xr) * SQRT  - a[7];
  a[ 7] -= a[ 6];
  a[22] -= a[ 7];
  a[23] -= a[22];
    
  xr = a[ 6];  a[ 6] = a[31] - xr;  a[31] = a[31] + xr;
  xr = a[ 7];  a[ 7] = a[30] - xr;  a[30] = a[30] + xr;
  xr = a[22];  a[22] = a[15] - xr;  a[15] = a[15] + xr;
  xr = a[23];  a[23] = a[14] - xr;  a[14] = a[14] + xr;

  xr = a[20] - a[ 8];  a[ 8] += a[20];  a[20] = shft9(xr) * wp[-10*27+25];
  xr = a[21] - a[ 9];  a[ 9] += a[21];  a[21] = shft9(xr) * wp[-10*27+25];
  xr = a[18] - a[10];  a[10] += a[18];  a[18] = shft9(xr) * wp[-12*27+25];
  xr = a[19] - a[11];  a[11] += a[19];  a[19] = shft9(xr) * wp[-12*27+25];
  xr = a[16] - a[12];  a[12] += a[16];  a[16] = shft9(xr) * wp[-14*27+25];
  xr = a[17] - a[13];  a[13] += a[17];  a[17] = shft9(xr) * wp[-14*27+25];
  xr =-a[20] + a[24];  a[20] += a[24];  a[24] = shft9(xr) * wp[-12*27+25];
  xr =-a[21] + a[25];  a[21] += a[25];  a[25] = shft9(xr) * wp[-12*27+25];
  xr = a[ 4] - a[ 8];  a[ 4] += a[ 8];  a[ 8] = shft9(xr) * wp[-12*27+25];
  xr = a[ 5] - a[ 9];  a[ 5] += a[ 9];  a[ 9] = shft9(xr) * wp[-12*27+25];
  xr = a[ 0] - a[12];  a[ 0] += a[12];  a[12] = shft9(xr) * wp[ -4*27+25];
  xr = a[ 1] - a[13];  a[ 1] += a[13];  a[13] = shft9(xr) * wp[ -4*27+25];
  xr = a[16] - a[28];  a[16] += a[28];  a[28] = shft9(xr) * wp[ -4*27+25];
  xr =-a[17] + a[29];  a[17] += a[29];  a[29] = shft9(xr) * wp[ -4*27+25];
  
  xr = SQRT * shft9(a[ 2] - a[10]);  a[ 2] += a[10];  a[10] = xr;
  xr = SQRT * shft9(a[ 3] - a[11]);  a[ 3] += a[11];  a[11] = xr;
  xr = SQRT * shft9(a[26] - a[18]);  a[18] += a[26];  a[26] = xr - a[18];
  xr = SQRT * shft9(a[27] - a[19]);  a[19] += a[27];  a[27] = xr - a[19];
  
  xr = a[ 2];  a[19] -= a[ 3];  a[ 3] -= xr;  a[ 2] = a[31] - xr;  a[31] += xr;
  xr = a[ 3];  a[11] -= a[19];  a[18] -= xr;  a[ 3] = a[30] - xr;  a[30] += xr;
  xr = a[18];  a[27] -= a[11];  a[19] -= xr;  a[18] = a[15] - xr;  a[15] += xr;
  
  xr = a[19];  a[10] -= xr;  a[19] = a[14] - xr;  a[14] += xr;
  xr = a[10];  a[11] -= xr;  a[10] = a[23] - xr;  a[23] += xr;
  xr = a[11];  a[26] -= xr;  a[11] = a[22] - xr;  a[22] += xr;
  xr = a[26];  a[27] -= xr;  a[26] = a[ 7] - xr;  a[ 7] += xr;
  
  xr = a[27];  a[27] = a[6] - xr;  a[6] += xr;
  
  xr = SQRT * shft9(a[ 0] - a[ 4]);  a[ 0] += a[ 4];  a[ 4] = xr;
  xr = SQRT * shft9(a[ 1] - a[ 5]);  a[ 1] += a[ 5];  a[ 5] = xr;
  xr = SQRT * shft9(a[16] - a[20]);  a[16] += a[20];  a[20] = xr;
  xr = SQRT * shft9(a[17] - a[21]);  a[17] += a[21];  a[21] = xr;
  xr =-SQRT * shft9(a[ 8] - a[12]);  a[ 8] += a[12];  a[12] = xr - a[ 8];
  xr =-SQRT * shft9(a[ 9] - a[13]);  a[ 9] += a[13];  a[13] = xr - a[ 9];
  xr =-SQRT * shft9(a[25] - a[29]);  a[25] += a[29];  a[29] = xr - a[25];
  xr =-SQRT * shft9(a[24] + a[28]);  a[24] -= a[28];  a[28] = xr - a[24];
  
  xr = a[24] - a[16]; a[24] = xr;
  xr = a[20] - xr;    a[20] = xr;
  xr = a[28] - xr;    a[28] = xr;
  
  xr = a[25] - a[17]; a[25] = xr;
  xr = a[21] - xr;    a[21] = xr;
  xr = a[29] - xr;    a[29] = xr;
  
  xr = a[17] - a[1];  a[17] = xr;
  xr = a[ 9] - xr;    a[ 9] = xr;
  xr = a[25] - xr;    a[25] = xr;
  xr = a[ 5] - xr;    a[ 5] = xr;
  xr = a[21] - xr;    a[21] = xr;
  xr = a[13] - xr;    a[13] = xr;
  xr = a[29] - xr;    a[29] = xr;
  
  xr = a[ 1] - a[0];  a[ 1] = xr;
  xr = a[16] - xr;    a[16] = xr;
  xr = a[17] - xr;    a[17] = xr;
  xr = a[ 8] - xr;    a[ 8] = xr;
  xr = a[ 9] - xr;    a[ 9] = xr;
  xr = a[24] - xr;    a[24] = xr;
  xr = a[25] - xr;    a[25] = xr;
  xr = a[ 4] - xr;    a[ 4] = xr;
  xr = a[ 5] - xr;    a[ 5] = xr;
  xr = a[20] - xr;    a[20] = xr;
  xr = a[21] - xr;    a[21] = xr;
  xr = a[12] - xr;    a[12] = xr;
  xr = a[13] - xr;    a[13] = xr;
  xr = a[28] - xr;    a[28] = xr;
  xr = a[29] - xr;    a[29] = xr;
  
  xr = a[ 0];  a[ 0] += a[31];  a[31] -= xr;
  xr = a[ 1];  a[ 1] += a[30];  a[30] -= xr;
  xr = a[16];  a[16] += a[15];  a[15] -= xr;
  xr = a[17];  a[17] += a[14];  a[14] -= xr;
  xr = a[ 8];  a[ 8] += a[23];  a[23] -= xr;
  xr = a[ 9];  a[ 9] += a[22];  a[22] -= xr;
  xr = a[24];  a[24] += a[ 7];  a[ 7] -= xr;
  xr = a[25];  a[25] += a[ 6];  a[ 6] -= xr;
  xr = a[ 4];  a[ 4] += a[27];  a[27] -= xr;
  xr = a[ 5];  a[ 5] += a[26];  a[26] -= xr;
  xr = a[20];  a[20] += a[11];  a[11] -= xr;
  xr = a[21];  a[21] += a[10];  a[10] -= xr;
  xr = a[12];  a[12] += a[19];  a[19] -= xr;
  xr = a[13];  a[13] += a[18];  a[18] -= xr;
  xr = a[28];  a[28] += a[ 3];  a[ 3] -= xr;
  xr = a[29];  a[29] += a[ 2];  a[ 2] -= xr;
}

void mdct_long(int *out, int *in) ICODE_ATTR;
void mdct_long(int *out, int *in)
{
  int ct,st;
  int tc1, tc2, tc3, tc4, ts5, ts6, ts7, ts8;
  int ts1, ts2, ts3, ts4, tc5, tc6, tc7, tc8;

  /* 1,2, 5,6, 9,10, 13,14, 17 */
  tc1 = in[17] - in[ 9];
  tc3 = in[15] - in[11];
  tc4 = in[14] - in[12];
  ts5 = in[ 0] + in[ 8];
  ts6 = in[ 1] + in[ 7];
  ts7 = in[ 2] + in[ 6];
  ts8 = in[ 3] + in[ 5];

  out[17] = (ts5 + ts7 - ts8) * cx[8] - (ts6 - in[4]) * cx[8];
  st      = (ts5 + ts7 - ts8) * cx[7] + (ts6 - in[4]) * cx[8];
  ct      = (tc1 - tc3 - tc4) * cx[6];
  out[5]  = ct + st;
  out[6]  = ct - st;
    
  tc2     = (in[16] - in[10]) * cx[6];
  ts6     =  ts6 * cx[7] + in[4] * cx[8];

  ct      =  tc1 * cx[0] + tc2 + tc3 * cx[1] + tc4 * cx[2];
  st      = -ts5 * cx[4] + ts6 - ts7 * cx[5] + ts8 * cx[3];
  out[1]  = ct + st;
  out[2]  = ct - st;
    
  ct      =  tc1 * cx[1] - tc2 - tc3 * cx[2] + tc4 * cx[0];
  st      = -ts5 * cx[5] + ts6 - ts7 * cx[3] + ts8 * cx[4];
  out[ 9] = ct + st;
  out[10] = ct - st;
    
  ct      = tc1 * cx[2] - tc2 + tc3 * cx[0] - tc4 * cx[1];
  st      = ts5 * cx[3] - ts6 + ts7 * cx[4] - ts8 * cx[5];
  out[13] = ct + st;
  out[14] = ct - st;

  ts1 = in[ 8] - in[ 0];
  ts3 = in[ 6] - in[ 2];
  ts4 = in[ 5] - in[ 3];
  tc5 = in[17] + in[ 9];
  tc6 = in[16] + in[10];
  tc7 = in[15] + in[11];
  tc8 = in[14] + in[12];

  out[0]  = (tc5 + tc7 + tc8) * cx[8] + (tc6 + in[13]) * cx[8];
  ct      = (tc5 + tc7 + tc8) * cx[7] - (tc6 + in[13]) * cx[8];
  st      = (ts1 - ts3 + ts4) * cx[6];
  out[11] = ct + st;
  out[12] = ct - st;

  ts2     = (in[7] - in[1]) * cx[6];
  tc6     = in[13] * cx[8] - tc6 * cx[7];

  ct      = tc5 * cx[3] - tc6 + tc7 * cx[4] + tc8 * cx[5];
  st      = ts1 * cx[2] + ts2 + ts3 * cx[0] + ts4 * cx[1];
  out[3]  = ct + st;
  out[4]  = ct - st;

  ct      =-tc5 * cx[5] + tc6 - tc7 * cx[3] - tc8 * cx[4];
  st      = ts1 * cx[1] + ts2 - ts3 * cx[2] - ts4 * cx[0];
  out[7]  = ct + st;
  out[8]  = ct - st;

  ct      =-tc5 * cx[4] + tc6 - tc7 * cx[5] - tc8 * cx[3];
  st      = ts1 * cx[0] - ts2 + ts3 * cx[1] - ts4 * cx[2];
  out[15] = ct + st;
  out[16] = ct - st;
}

static int find_bitrate_index(int type, uint16_t bitrate)
{
  int i;

  for(i=0;i<14;i++)
    if(bitrate == bitr_index[type][i])
      break;

  return i;
}

static int find_samplerate_index(uint16_t freq, int *mp3_type)
{
  int    mpg, rate;

  /* set default values: MPEG1 at 44100/s */
  *mp3_type = 1;

  for(mpg=0; mpg<2; mpg++)
    for(rate=0; rate<3; rate++)
      if(freq == sampr_index[mpg][rate])
      { *mp3_type = mpg; return rate; }

  return 0;
}

static void init_mp3_encoder_engine(bool stereo, int bitrate, uint16_t sample_rate)
{
  uint32_t  avg_byte_per_frame;

#ifdef ROCKBOX_LITTLE_ENDIAN
  cfg.byte_order = order_littleEndian;
#else
  cfg.byte_order = order_bigEndian;
#endif

  cfg.samplerate    = sample_rate;
  cfg.channels      = stereo ? 2 : 1;
  cfg.mpg.mode      = stereo ? 0 : 3; /* 0=stereo, 3=mono */
  cfg.mpg.bitrate   = stereo ? bitrate : bitrate > 160 ? 160 : bitrate;
  cfg.mpg.smpl_id   = find_samplerate_index(cfg.samplerate, &cfg.mpg.type);
  cfg.mpg.bitr_id   = find_bitrate_index(cfg.mpg.type, cfg.mpg.bitrate);
  cfg.mpg.num_bands = num_bands[stereo ? cfg.mpg.type : 2][cfg.mpg.bitr_id];
  
  if(0 == cfg.mpg.type)
  { /* use MPEG2 format */
    cfg.smpl_per_frm = MAX_SAMP_PER_FRAME/2;
    cfg.granules     = 1;
  }
  else
  { /* use MPEG1 format */
    cfg.smpl_per_frm = MAX_SAMP_PER_FRAME;
    cfg.granules     = 2;
  }

  scalefac = sfBand[cfg.mpg.smpl_id + 3*cfg.mpg.type];

  ht[ 0].table =  NULL;  ht[ 0].hlen = NULL; /* Apparently not used */
  ht[ 1].table =  t1HB;  ht[ 1].hlen =  t1l;
  ht[ 2].table =  t2HB;  ht[ 2].hlen =  t2l;
  ht[ 3].table =  t3HB;  ht[ 3].hlen =  t3l;
  ht[ 4].table =  NULL;  ht[ 4].hlen = NULL; /* Apparently not used */
  ht[ 5].table =  t5HB;  ht[ 5].hlen =  t5l;
  ht[ 6].table =  t6HB;  ht[ 6].hlen =  t6l;
  ht[ 7].table =  t7HB;  ht[ 7].hlen =  t7l;
  ht[ 8].table =  t8HB;  ht[ 8].hlen =  t8l;
  ht[ 9].table =  t9HB;  ht[ 9].hlen =  t9l;
  ht[10].table = t10HB;  ht[10].hlen = t10l;
  ht[11].table = t11HB;  ht[11].hlen = t11l;
  ht[12].table = t12HB;  ht[12].hlen = t12l;
  ht[13].table = t13HB;  ht[13].hlen = t13l;
  ht[14].table =  NULL;  ht[14].hlen = NULL; /* Apparently not used */
  ht[15].table = t15HB;  ht[15].hlen = t15l;

  /* Figure average number of 'bytes' per frame */
  avg_byte_per_frame = SAMPL2 * 16000 * cfg.mpg.bitrate / (2 - cfg.mpg.type);
  avg_byte_per_frame = avg_byte_per_frame / cfg.samplerate;
  cfg.byte_per_frame = avg_byte_per_frame / 64;
  cfg.frac_per_frame = avg_byte_per_frame & 63;
  cfg.slot_lag       = 0;
  cfg.sideinfo_len   = 32 + (cfg.mpg.type ? (cfg.channels == 1 ? 136 : 256)
                                          : (cfg.channels == 1 ?  72 : 136));
}

static void set_scale_facs(int *mdct_freq)
{
  unsigned int i, is, ie, k, s;
  int max_freq_val, avrg_freq_val;

  /* calc average of first 256 frequency values */
  for(avrg_freq_val=i=0; i<256; i++)
    avrg_freq_val += mdct_freq[i];
  avrg_freq_val >>= 8;

  /* if max of current band is smaller than average, increase precision */
  /* last band keeps untouched (not scaled) */
  for(is=k=0; is<scalefac[21]; k++)
  {
    max_freq_val = 0;

    for(i=is, ie=scalefac[k+1]; i<ie; i++)
      if(max_freq_val < mdct_freq[i])
        max_freq_val = mdct_freq[i];

    for(s=0; s<3; s++)
      if((max_freq_val<<s) > avrg_freq_val)
        break;

    band_scale_f[k] = (unsigned char)s;

    for(i=is; s && i<ie; i++)
      mdct_freq[i] <<= s;

    is = ie;
  }
}

static void compress(void)
{
  int      i, gr, gr_cnt;
  uint32_t max;

  while(1)
  {
    if((frames & 7) == 0)
    { rb->lcd_clear_display();
      rb->lcd_putsxyf(4, 20, "Frame %d / %d", frames, 
          wav_size/cfg.smpl_per_frm/cfg.channels/2);
      rb->lcd_update();
    }
    /* encode one mp3 frame in this loop */
    memset(CodedData.bbuf, 0, sizeof(CodedData.bbuf));
      
    if((cfg.slot_lag += cfg.frac_per_frame) >= 64)
    { /* Padding for this frame */
      cfg.slot_lag   -= 64;
      cfg.mpg.padding = 1;
    }
    else
      cfg.mpg.padding = 0;

    cfg.mean_bits = (8 * cfg.byte_per_frame + 8 * cfg.mpg.padding
                       - cfg.sideinfo_len) / cfg.granules / cfg.channels
                       - 42; // reserved for scale_facs

    /* shift out old samples */
    memcpy(mfbuf, mfbuf + 2*cfg.granules*576, 4*512);

    /* read new samples to iram for further processing */
    if(read_samples((mfbuf + 2*512), cfg.smpl_per_frm) == 0)
      break;

    /* swap bytes if neccessary */
    if(cfg.byte_order == order_bigEndian)
      for(i=0; i<cfg.smpl_per_frm; i++)
      {
        uint32_t t = ((uint32_t*)mfbuf)[512 + i];
        t = ((t >> 8) & 0xff00ff) | ((t << 8) & 0xff00ff00);
        ((uint32_t*)mfbuf)[512 + i] = t;
      }

    cfg.ResvSize = 0;
    gr_cnt = cfg.granules * cfg.channels;
    CodedData.bitpos = cfg.sideinfo_len; /* leave space for mp3 header */

    for(gr=0; gr<cfg.granules; gr++)
    {
      short *wk = mfbuf + 2*286 + gr*1152;
      int ch;

      /* 16bit packed wav data can be windowed efficiently on coldfire */
      window_subband1(wk, sb_data[0][1-gr][0], sb_data[1][1-gr][0]);

      for(ch=0; ch<cfg.channels; ch++)
      {
        int   ii, k, shift;

        wk = mfbuf + 2*286 + gr*1152 + ch;

        /* 36864=4*18*16*32 */
        for(k=0; k<18; k++, wk+=64)
        {
          window_subband2(wk, sb_data[ch][1-gr][k]);
          /* Compensate for inversion in the analysis filter */
          if(k & 1)
          {
            int band;
            for(band=1; band<32; band+=2)
            sb_data[ch][1-gr][k][band] *= -1;
          }
        }

        /* Perform imdct of 18 previous + 18 current subband samples */
        /* for integer precision do this loop again (if neccessary)  */
        shift = 14 - (cfg.cod_info[gr][ch].additStep >> 2);
        for(k=1,ii=0; ii<3 && k; ii++)
        {
          int *mdct = mdct_freq;
          int band;

          cfg.cod_info[gr][ch].additStep = 4 * (14 - shift);
          for(band=0; band<cfg.mpg.num_bands; band++, mdct+=18)
          {
            int *band0 = sb_data[ch][  gr][0] + order[band];
            int *band1 = sb_data[ch][1-gr][0] + order[band];
            int work[18];

            /* 9216=4*32*9*8 */
            for(k=-9; k<0; k++)
            {
              int a = shft_n(band1[(k+9)*32], shift);
              int b = shft_n(band1[(8-k)*32], shift);
              int c = shft_n(band0[(k+9)*32], shift);
              int d = shft_n(band0[(8-k)*32], shift);

              work[k+ 9] = shft16(a * win[k+ 9][0] +
                                  b * win[k+ 9][1] +
                                  c * win[k+ 9][2] +
                                  d * win[k+ 9][3]);

              work[k+18] = shft16(c * win[k+18][0] +
                                  d * win[k+18][1] +
                                  a * win[k+18][2] +
                                  b * win[k+18][3]);
            }

            /* 7200=4*18*100 */
            mdct_long(mdct, work);

            /* Perform aliasing reduction butterfly */
            if(band != 0)
            {
              for(k=7; k>=0; --k)
              {
                int bu, bd;
                bu = shft15(mdct[k]) * ca[k] +
                     shft15(mdct[-1-k]) * cs[k];
                bd = shft15(mdct[k]) * cs[k] -
                     shft15(mdct[-1-k]) * ca[k];
                mdct[-1-k] = bu;
                mdct[ k  ] = bd;
              }
            }
          }

          max = 0;
          for(k=0; k<576; k++)
          {
            if(mdct_freq[k] < 0)
            {
              mdct_sign[k] = 1; /* negative */
              mdct_freq[k] = shft13(-mdct_freq[k]);
            }
            else
            {
              mdct_sign[k] = 0; /* positive */
              mdct_freq[k] = shft13(mdct_freq[k]);
            }

            if(max < (uint32_t)mdct_freq[k])
              max = (uint32_t)mdct_freq[k];
          }

          cfg.cod_info[gr][ch].max_val = max;

          /* calc new shift for higher integer precision */
          for(k=0; max<(uint32_t)(0x7800>>k); k++) shift--;
          for( ; (max>>k)>=(uint32_t)0x10000; k++) shift++;
          if(shift < 0)  shift = 0;
        }

        cfg.cod_info[gr][ch].quantStep +=
                            cfg.cod_info[gr][ch].additStep;

        set_scale_facs(mdct_freq);

        /* bit and noise allocation */
        iteration_loop(mdct_freq, &cfg.cod_info[gr][ch],
                       gr_cnt--);
        /* write the frame to the bitstream */
        Huffmancodebits(enc_data, mdct_sign,
                        &cfg.cod_info[gr][ch]);

        cfg.cod_info[gr][ch].quantStep -=
                            cfg.cod_info[gr][ch].additStep;

        if(cfg.granules == 1)
        {
          memcpy(sb_data[ch][0], sb_data[ch][1],
                 sizeof(sb_data[ch][0]));
        }
      }
    }

    enc_size = (CodedData.bitpos + 7) >> 3;
    /* finish this chunk by adding sideinfo header data */
    CodedData.bitpos = 0;
    encodeSideInfo( cfg.cod_info );

    if(cfg.byte_order != order_bigEndian)
      for(i=0; i<(enc_size+3)/4; i++)
        CodedData.bbuf[i] = myswap32(CodedData.bbuf[i]);

    if(enc_chunk + enc_size > (int)enc_buffer_size)
    {
      /* copy iram mp3 buffer to sdram/file */
      rb->write(mp3file, enc_buffer, enc_chunk & ~3);
      memcpy(enc_buffer, enc_buffer + (enc_chunk >> 2), enc_chunk & 3);
      enc_chunk &= 3;
    }

    memcpy(enc_buffer + enc_chunk, CodedData.bbuf, enc_size);
    enc_chunk += enc_size;
    frames++;
  }
  /* write last chunks to disk */
  rb->write(mp3file, enc_buffer, enc_chunk);
}


int  num_file;
char mp3_name[80];

static void get_mp3_filename(const char *wav_name)
{
    rb->strlcpy(mp3_name, wav_name, sizeof(mp3_name));
    rb->strlcpy(mp3_name + rb->strlen(mp3_name) - 4, ".mp3", 5);
}

#if CONFIG_KEYPAD == IRIVER_H100_PAD || CONFIG_KEYPAD == IRIVER_H300_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_OFF
#define MP3ENC_SELECT BUTTON_SELECT

#elif (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \
      (CONFIG_KEYPAD == IPOD_1G2G_PAD)
#define MP3ENC_PREV BUTTON_SCROLL_BACK
#define MP3ENC_NEXT BUTTON_SCROLL_FWD
#define MP3ENC_DONE BUTTON_MENU
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == GIGABEAT_PAD || \
      CONFIG_KEYPAD == SAMSUNG_YPR0_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_SELECT

#elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
      (CONFIG_KEYPAD == SANSA_C200_PAD) || \
      (CONFIG_KEYPAD == SANSA_CLIP_PAD) || \
      (CONFIG_KEYPAD == SANSA_M200_PAD)
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_SELECT

#elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
#define MP3ENC_PREV BUTTON_SCROLL_BACK
#define MP3ENC_NEXT BUTTON_SCROLL_FWD
#define MP3ENC_DONE BUTTON_UP
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == IRIVER_H10_PAD
#define MP3ENC_PREV BUTTON_SCROLL_UP
#define MP3ENC_NEXT BUTTON_SCROLL_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_PLAY

#elif CONFIG_KEYPAD == GIGABEAT_S_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_BACK
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == MROBE100_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == IAUDIO_M3_PAD
#define MP3ENC_PREV BUTTON_RC_VOL_UP
#define MP3ENC_NEXT BUTTON_RC_VOL_DOWN
#define MP3ENC_DONE BUTTON_RC_REC
#define MP3ENC_SELECT BUTTON_RC_FF

#elif CONFIG_KEYPAD == COWON_D2_PAD
#define MP3ENC_DONE BUTTON_POWER

#elif CONFIG_KEYPAD == IAUDIO67_PAD
#define MP3ENC_PREV BUTTON_LEFT
#define MP3ENC_NEXT BUTTON_RIGHT
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_PLAY

#elif CONFIG_KEYPAD == CREATIVEZVM_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_BACK
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == PHILIPS_HDD6330_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_PLAY

#elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_POWER
#define MP3ENC_SELECT BUTTON_PLAY

#elif CONFIG_KEYPAD == ONDAVX747_PAD || \
CONFIG_KEYPAD == ONDAVX777_PAD || \
CONFIG_KEYPAD == MROBE500_PAD
#define MP3ENC_DONE BUTTON_POWER

#elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
#define MP3ENC_PREV   BUTTON_UP
#define MP3ENC_NEXT   BUTTON_DOWN
#define MP3ENC_DONE   BUTTON_PLAY
#define MP3ENC_SELECT BUTTON_RIGHT

#elif CONFIG_KEYPAD == PBELL_VIBE500_PAD
#define MP3ENC_PREV BUTTON_UP
#define MP3ENC_NEXT BUTTON_DOWN
#define MP3ENC_DONE BUTTON_REC
#define MP3ENC_SELECT BUTTON_OK

#elif CONFIG_KEYPAD == MPIO_HD200_PAD
#define MP3ENC_PREV BUTTON_REW
#define MP3ENC_NEXT BUTTON_FF
#define MP3ENC_DONE BUTTON_PLAY
#define MP3ENC_SELECT BUTTON_FUNC

#elif CONFIG_KEYPAD == MPIO_HD300_PAD
#define MP3ENC_PREV BUTTON_REW
#define MP3ENC_NEXT BUTTON_FF
#define MP3ENC_DONE BUTTON_PLAY
#define MP3ENC_SELECT BUTTON_ENTER

#elif CONFIG_KEYPAD == SANSA_FUZEPLUS_PAD
#define MP3ENC_PREV BUTTON_LEFT
#define MP3ENC_NEXT BUTTON_RIGHT
#define MP3ENC_DONE BUTTON_PLAYPAUSE
#define MP3ENC_SELECT BUTTON_SELECT

#elif CONFIG_KEYPAD == SANSA_CONNECT_PAD
#define MP3ENC_PREV BUTTON_PREV
#define MP3ENC_NEXT BUTTON_NEXT
#define MP3ENC_DONE BUTTON_DOWN
#define MP3ENC_SELECT BUTTON_SELECT

#elif (CONFIG_KEYPAD == HM60X_PAD) || \
    (CONFIG_KEYPAD == HM801_PAD)
#define MP3ENC_PREV BUTTON_LEFT
#define MP3ENC_NEXT BUTTON_RIGHT
#define MP3ENC_DONE BUTTON_DOWN
#define MP3ENC_SELECT BUTTON_SELECT

#else
#error No keymap defined!
#endif

#ifdef HAVE_TOUCHSCREEN
#ifndef MP3ENC_PREV
#define MP3ENC_PREV   BUTTON_MIDLEFT
#endif
#ifndef MP3ENC_NEXT
#define MP3ENC_NEXT   BUTTON_MIDRIGHT
#endif
#ifndef MP3ENC_DONE
#define MP3ENC_DONE   BUTTON_TOPLEFT
#endif
#ifndef MP3ENC_SELECT
#define MP3ENC_SELECT BUTTON_CENTER
#endif
#endif

enum plugin_status plugin_start(const void* parameter)
{
    int   rat, srat, nrat; /* for rate selection */
    int   cont = 1, butt;
    int   ret;
    long  tim  = 0;
    static const char* bstrg[] = {
        "64", "80", "96", "112", "128", "160", "192", "224", "256", "320"
    };
    static const int brate[] = {
        64, 80, 96, 112, 128, 160, 192, 224, 256, 320
    };

    if (parameter == NULL)
        return PLUGIN_ERROR;

    enc_buffer = rb->plugin_get_audio_buffer(&enc_buffer_size);

#ifdef CPU_COLDFIRE
    coldfire_set_macsr(0); /* integer mode */
#endif

    rb->lcd_setfont(FONT_SYSFIXED);

#ifdef HAVE_ADJUSTABLE_CPU_FREQ
    rb->cpu_boost(true);
#endif
    rb->button_clear_queue();

    nrat = 9;
    srat = 4; /* set 128kBit as default */

    while(cont && (butt = rb->button_get_w_tmo(HZ/10)) != MP3ENC_SELECT)
    {
        switch(butt)
        {
            case MP3ENC_DONE:   cont = 0;               break;
            case MP3ENC_PREV|BUTTON_REPEAT:
            case MP3ENC_PREV:   if(srat >  0  ) srat--; break;
            case MP3ENC_NEXT|BUTTON_REPEAT:
            case MP3ENC_NEXT:   if(srat < nrat) srat++; break;
        }

        rb->lcd_clear_display();
        rb->lcd_putsxy(2, 2, "-- Select Bitrate --");

        for(rat=0; rat<=nrat; rat++)
            rb->lcd_putsxy(2, 12 + rat*8, bstrg[rat]);
        rb->lcd_set_drawmode(DRMODE_COMPLEMENT);
        rb->lcd_fillrect(0, 12 + srat*8, 127, 8);
        rb->lcd_set_drawmode(DRMODE_SOLID);
        rb->lcd_update();
    }

    wav_filename = parameter;

    if(cont)
    {
        ret = wave_open();
        if(ret == 0)
        {
            init_mp3_encoder_engine((cfg.channels==2), brate[srat], cfg.samplerate);
            get_mp3_filename(wav_filename);
            mp3file = rb->open(mp3_name , O_WRONLY|O_CREAT|O_TRUNC, 0666);
            frames  = 0;

            tim = *rb->current_tick;
            compress();
            tim = *rb->current_tick - tim;

            rb->close(wavfile);
            rb->close(mp3file);
            rb->reload_directory();
        }
        else
        {
            rb->close(wavfile);
            rb->lcd_clear_display();
            rb->lcd_putsxyf(0, 20, "WaveOpen failed %d", ret);
            rb->lcd_putsxyf(0, 30, "%s", mp3_enc_err[-ret]);
            rb->lcd_update();
            rb->sleep(5*HZ);
        }

        rb->lcd_clear_display();
        rb->lcd_putsxyf(0, 30, "  Conversion: %ld.%02lds    ", tim/100, tim%100);
        tim = frames * cfg.smpl_per_frm * 100 / cfg.samplerate; /* unit=.01s */
        rb->lcd_putsxyf(0, 20, "  WAV-Length: %ld.%02lds    ", tim/100, tim%100);
        rb->lcd_update();
        rb->sleep(5*HZ);
    }

    rb->lcd_setfont(FONT_UI);
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
    rb->cpu_boost(false);
#endif
    return PLUGIN_OK;
}