dlls/winemp3.acm/mpg123.h

   1 /*
   2  * Copyright (c) Michael Hipp and other authors of the mpglib project.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include        <stdio.h>
  20 #include        <string.h>
  21 #include        <signal.h>
  22
  23 #ifndef WIN32
  24 #include        <sys/signal.h>
  25 #include        <unistd.h>
  26 #endif
  27
  28 #include        <math.h>
  29
  30 #ifdef _WIN32
  31 # undef WIN32
  32 # define WIN32
  33
  34 # define M_PI       3.14159265358979323846
  35 # define M_SQRT2        1.41421356237309504880
  36 # define REAL_IS_FLOAT
  37 # define NEW_DCT9
  38
  39 # define random rand
  40 # define srandom srand
  41
  42 #endif
  43
  44 #ifdef REAL_IS_FLOAT
  45 #  define real float
  46 #elif defined(REAL_IS_LONG_DOUBLE)
  47 #  define real long double
  48 #else
  49 #  define real double
  50 #endif
  51
  52 #ifdef __GNUC__
  53 #define INLINE inline
  54 #else
  55 #define INLINE
  56 #endif
  57
  58 /* AUDIOBUFSIZE = n*64 with n=1,2,3 ...  */
  59 #define         AUDIOBUFSIZE            16384
  60
  61 #ifndef FALSE
  62 #define         FALSE                   0
  63 #endif
  64 #ifndef FALSE
  65 #define         TRUE                    1
  66 #endif
  67
  68 #define         SBLIMIT                 32
  69 #define         SSLIMIT                 18
  70
  71 #define         SCALE_BLOCK             12
  72
  73
  74 #define         MPG_MD_STEREO           0
  75 #define         MPG_MD_JOINT_STEREO     1
  76 #define         MPG_MD_DUAL_CHANNEL     2
  77 #define         MPG_MD_MONO             3
  78
  79 #define MAXFRAMESIZE 1792
  80
  81
  82 /* Pre Shift fo 16 to 8 bit converter table */
  83 #define AUSHIFT (3)
  84
  85 struct frame {
  86     int stereo;
  87     int jsbound;
  88     int single;
  89     int lsf;
  90     int mpeg25;
  91     int header_change;
  92     int lay;
  93     int error_protection;
  94     int bitrate_index;
  95     int sampling_frequency;
  96     int padding;
  97     int extension;
  98     int mode;
  99     int mode_ext;
 100     int copyright;
 101     int original;
 102     int emphasis;
 103     int framesize; /* computed framesize */
 104
 105     /* layer2 stuff */
 106     int II_sblimit;
 107     const struct al_table *alloc;
 108 };
 109
 110 struct parameter {
 111         int quiet;      /* shut up! */
 112         int tryresync;  /* resync stream after error */
 113         int verbose;    /* verbose level */
 114         int checkrange;
 115 };
 116
 117 extern unsigned int   get1bit(void);
 118 extern unsigned int   getbits(int);
 119 extern unsigned int   getbits_fast(int);
 120 extern int set_pointer(long);
 121
 122 extern unsigned char *wordpointer;
 123 extern int bitindex;
 124
 125 extern void make_decode_tables(long scaleval);
 126 extern int do_layer3(struct frame *fr,unsigned char *,int *);
 127 extern int do_layer2(struct frame *fr,unsigned char *,int *);
 128 extern int do_layer1(struct frame *fr,unsigned char *,int *);
 129 extern int decode_header(struct frame *fr,unsigned long newhead);
 130
 131
 132
 133 struct gr_info_s {
 134       int scfsi;
 135       unsigned part2_3_length;
 136       unsigned big_values;
 137       unsigned scalefac_compress;
 138       unsigned block_type;
 139       unsigned mixed_block_flag;
 140       unsigned table_select[3];
 141       unsigned subblock_gain[3];
 142       unsigned maxband[3];
 143       unsigned maxbandl;
 144       unsigned maxb;
 145       unsigned region1start;
 146       unsigned region2start;
 147       unsigned preflag;
 148       unsigned scalefac_scale;
 149       unsigned count1table_select;
 150       real *full_gain[3];
 151       real *pow2gain;
 152 };
 153
 154 struct III_sideinfo
 155 {
 156   unsigned main_data_begin;
 157   unsigned private_bits;
 158   struct {
 159     struct gr_info_s gr[2];
 160   } ch[2];
 161 };
 162
 163 extern int synth_1to1 (real *,int,unsigned char *,int *);
 164 extern int synth_1to1_8bit (real *,int,unsigned char *,int *);
 165 extern int synth_1to1_mono (real *,unsigned char *,int *);
 166 extern int synth_1to1_mono2stereo (real *,unsigned char *,int *);
 167 extern int synth_1to1_8bit_mono (real *,unsigned char *,int *);
 168 extern int synth_1to1_8bit_mono2stereo (real *,unsigned char *,int *);
 169
 170 extern int synth_2to1 (real *,int,unsigned char *,int *);
 171 extern int synth_2to1_8bit (real *,int,unsigned char *,int *);
 172 extern int synth_2to1_mono (real *,unsigned char *,int *);
 173 extern int synth_2to1_mono2stereo (real *,unsigned char *,int *);
 174 extern int synth_2to1_8bit_mono (real *,unsigned char *,int *);
 175 extern int synth_2to1_8bit_mono2stereo (real *,unsigned char *,int *);
 176
 177 extern int synth_4to1 (real *,int,unsigned char *,int *);
 178 extern int synth_4to1_8bit (real *,int,unsigned char *,int *);
 179 extern int synth_4to1_mono (real *,unsigned char *,int *);
 180 extern int synth_4to1_mono2stereo (real *,unsigned char *,int *);
 181 extern int synth_4to1_8bit_mono (real *,unsigned char *,int *);
 182 extern int synth_4to1_8bit_mono2stereo (real *,unsigned char *,int *);
 183
 184 extern int synth_ntom (real *,int,unsigned char *,int *);
 185 extern int synth_ntom_8bit (real *,int,unsigned char *,int *);
 186 extern int synth_ntom_mono (real *,unsigned char *,int *);
 187 extern int synth_ntom_mono2stereo (real *,unsigned char *,int *);
 188 extern int synth_ntom_8bit_mono (real *,unsigned char *,int *);
 189 extern int synth_ntom_8bit_mono2stereo (real *,unsigned char *,int *);
 190
 191 extern void rewindNbits(int bits);
 192 extern int  hsstell(void);
 193 extern int get_songlen(struct frame *fr,int no);
 194
 195 extern void init_layer3(int);
 196 extern void init_layer2(void);
 197 extern void make_decode_tables(long scale);
 198 extern void make_conv16to8_table(int);
 199 extern void dct64(real *,real *,real *);
 200
 201 extern void synth_ntom_set_step(long,long);
 202
 203 extern unsigned char *conv16to8;
 204 extern const long freqs[9];
 205 extern real muls[27][64];
 206 extern real decwin[512+32];
 207 extern real *pnts[5];
 208
 209 extern const struct parameter param;