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
  38 #endif
  39
  40 #ifdef REAL_IS_FLOAT
  41 #  define real float
  42 #elif defined(REAL_IS_LONG_DOUBLE)
  43 #  define real long double
  44 #else
  45 #  define real double
  46 #endif
  47
  48 #ifdef __GNUC__
  49 #define INLINE inline
  50 #else
  51 #define INLINE
  52 #endif
  53
  54 #ifndef FALSE
  55 #define         FALSE                   0
  56 #endif
  57 #ifndef TRUE
  58 #define         TRUE                    1
  59 #endif
  60
  61 #define         SBLIMIT                 32
  62 #define         SSLIMIT                 18
  63
  64 #define         SCALE_BLOCK             12
  65
  66
  67 #define         MPG_MD_STEREO           0
  68 #define         MPG_MD_JOINT_STEREO     1
  69 #define         MPG_MD_DUAL_CHANNEL     2
  70 #define         MPG_MD_MONO             3
  71
  72 #define MAXFRAMESIZE 1792
  73
  74
  75 struct frame {
  76     int stereo;
  77     int jsbound;
  78     int single;
  79     int lsf;
  80     int mpeg25;
  81     int header_change;
  82     int lay;
  83     int error_protection;
  84     int bitrate_index;
  85     int sampling_frequency;
  86     int padding;
  87     int extension;
  88     int mode;
  89     int mode_ext;
  90     int copyright;
  91     int original;
  92     int emphasis;
  93     int framesize; /* computed framesize */
  94
  95     /* layer2 stuff */
  96     int II_sblimit;
  97     const struct al_table *alloc;
  98
  99     struct mpstr *mp;
 100 };
 101
 102 struct parameter {
 103         int quiet;      /* shut up! */
 104         int tryresync;  /* resync stream after error */
 105         int verbose;    /* verbose level */
 106         int checkrange;
 107 };
 108
 109 extern unsigned int   get1bit(void);
 110 extern unsigned int   getbits(int);
 111 extern unsigned int   getbits_fast(int);
 112 extern int set_pointer(struct mpstr *,long);
 113
 114 extern unsigned char *wordpointer;
 115 extern int bitindex;
 116
 117 extern void make_decode_tables(long scaleval);
 118 extern int do_layer3(struct frame *fr,unsigned char *,int *);
 119 extern int do_layer2(struct frame *fr,unsigned char *,int *);
 120 extern int do_layer1(struct frame *fr,unsigned char *,int *);
 121 extern int decode_header(struct frame *fr,unsigned long newhead);
 122
 123
 124
 125 struct gr_info_s {
 126       int scfsi;
 127       unsigned part2_3_length;
 128       unsigned big_values;
 129       unsigned scalefac_compress;
 130       unsigned block_type;
 131       unsigned mixed_block_flag;
 132       unsigned table_select[3];
 133       unsigned subblock_gain[3];
 134       unsigned maxband[3];
 135       unsigned maxbandl;
 136       unsigned maxb;
 137       unsigned region1start;
 138       unsigned region2start;
 139       unsigned preflag;
 140       unsigned scalefac_scale;
 141       unsigned count1table_select;
 142       real *full_gain[3];
 143       real *pow2gain;
 144 };
 145
 146 struct III_sideinfo
 147 {
 148   unsigned main_data_begin;
 149   unsigned private_bits;
 150   struct {
 151     struct gr_info_s gr[2];
 152   } ch[2];
 153 };
 154
 155 extern int synth_1to1 (struct mpstr *,real *,int,unsigned char *,int *);
 156 extern int synth_1to1_mono (struct mpstr *,real *,unsigned char *,int *);
 157
 158 extern void init_layer3(int);
 159 extern void init_layer2(void);
 160 extern void make_decode_tables(long scale);
 161 extern void dct64(real *,real *,real *);
 162
 163 extern unsigned char *conv16to8;
 164 extern const long freqs[9];
 165 extern real muls[27][64];
 166 extern real decwin[512+32];
 167 extern real *pnts[5];
 168
 169 extern const struct parameter param;