Mercurial > SDL_sound_CoreAudio
annotate decoders/mpglib/mpg123_sdlsound.h @ 385:9efb760c4a6b
FIXME removal and cleanups.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Fri, 05 Jul 2002 22:32:54 +0000 |
| parents | cbb15ecf423a |
| children | c42ac9ee2ce4 |
| rev | line source |
|---|---|
| 261 | 1 #include <stdio.h> |
| 2 #include <string.h> | |
| 3 | |
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4 #if !defined(WIN32) && !defined(macintosh) && !defined(_WIN32_WCE) |
| 261 | 5 #include <unistd.h> |
| 6 #endif | |
| 7 | |
| 8 #include <math.h> | |
| 9 | |
| 322 | 10 #if defined(_WIN32) |
| 261 | 11 # undef WIN32 |
| 12 # define WIN32 | |
| 322 | 13 #endif |
| 14 | |
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15 #if defined(WIN32) || defined(macintosh) || defined(_WIN32_WCE) |
| 261 | 16 |
| 17 # define M_PI 3.14159265358979323846 | |
| 18 # define M_SQRT2 1.41421356237309504880 | |
| 19 # define REAL_IS_FLOAT | |
| 20 # define NEW_DCT9 | |
| 21 | |
| 22 # define random rand | |
| 23 # define srandom srand | |
| 24 | |
| 25 #endif | |
| 26 | |
| 27 #ifdef REAL_IS_FLOAT | |
| 28 # define real float | |
| 29 #elif defined(REAL_IS_LONG_DOUBLE) | |
| 30 # define real long double | |
| 31 #else | |
| 32 # define real double | |
| 33 #endif | |
| 34 | |
| 35 #ifdef __GNUC__ | |
| 36 #define INLINE inline | |
|
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Patches for Visual C compatibility.
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37 #elif (defined _MSC_VER) |
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38 #define INLINE __inline__ |
| 261 | 39 #else |
| 40 #define INLINE | |
| 41 #endif | |
| 42 | |
| 43 /* AUDIOBUFSIZE = n*64 with n=1,2,3 ... */ | |
| 44 #define AUDIOBUFSIZE 16384 | |
| 45 | |
| 46 #ifndef FALSE | |
| 47 #define FALSE 0 | |
| 48 #endif | |
| 49 #ifndef FALSE | |
| 50 #define TRUE 1 | |
| 51 #endif | |
| 52 | |
| 53 #define SBLIMIT 32 | |
| 54 #define SSLIMIT 18 | |
| 55 | |
| 56 #define SCALE_BLOCK 12 | |
| 57 | |
| 58 | |
| 59 #define MPG_MD_STEREO 0 | |
| 60 #define MPG_MD_JOINT_STEREO 1 | |
| 61 #define MPG_MD_DUAL_CHANNEL 2 | |
| 62 #define MPG_MD_MONO 3 | |
| 63 | |
| 64 #define MAXFRAMESIZE 1792 | |
| 65 | |
| 66 | |
| 67 /* Pre Shift fo 16 to 8 bit converter table */ | |
| 68 #define AUSHIFT (3) | |
| 69 | |
| 70 struct frame { | |
| 71 int stereo; | |
| 72 int jsbound; | |
| 73 int single; | |
| 74 int lsf; | |
| 75 int mpeg25; | |
| 76 int header_change; | |
| 77 int lay; | |
| 78 int error_protection; | |
| 79 int bitrate_index; | |
| 80 int sampling_frequency; | |
| 81 int padding; | |
| 82 int extension; | |
| 83 int mode; | |
| 84 int mode_ext; | |
| 85 int copyright; | |
| 86 int original; | |
| 87 int emphasis; | |
| 88 int framesize; /* computed framesize */ | |
| 89 | |
| 90 /* layer2 stuff */ | |
| 91 int II_sblimit; | |
| 92 void *alloc; | |
| 93 }; | |
| 94 | |
| 95 struct parameter { | |
| 96 int quiet; /* shut up! */ | |
| 97 int tryresync; /* resync stream after error */ | |
| 98 int verbose; /* verbose level */ | |
| 99 int checkrange; | |
| 100 }; | |
| 101 | |
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102 struct mpstr; /* forward declaration. */ |
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103 |
| 261 | 104 extern unsigned int get1bit(void); |
| 105 extern unsigned int getbits(int); | |
| 106 extern unsigned int getbits_fast(int); | |
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107 extern int set_pointer(long,struct mpstr *); |
| 261 | 108 |
| 109 extern unsigned char *wordpointer; | |
| 110 extern int bitindex; | |
| 111 | |
| 112 extern void make_decode_tables(long scaleval); | |
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113 extern int do_layer3(struct frame *fr,unsigned char *,int *,struct mpstr *); |
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114 extern int do_layer2(struct frame *fr,unsigned char *,int *,struct mpstr *); |
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115 extern int do_layer1(struct frame *fr,unsigned char *,int *,struct mpstr *); |
| 261 | 116 extern int decode_header(struct frame *fr,unsigned long newhead); |
| 117 | |
| 118 | |
| 119 | |
| 120 struct gr_info_s { | |
| 121 int scfsi; | |
| 122 unsigned part2_3_length; | |
| 123 unsigned big_values; | |
| 124 unsigned scalefac_compress; | |
| 125 unsigned block_type; | |
| 126 unsigned mixed_block_flag; | |
| 127 unsigned table_select[3]; | |
| 128 unsigned subblock_gain[3]; | |
| 129 unsigned maxband[3]; | |
| 130 unsigned maxbandl; | |
| 131 unsigned maxb; | |
| 132 unsigned region1start; | |
| 133 unsigned region2start; | |
| 134 unsigned preflag; | |
| 135 unsigned scalefac_scale; | |
| 136 unsigned count1table_select; | |
| 137 real *full_gain[3]; | |
| 138 real *pow2gain; | |
| 139 }; | |
| 140 | |
| 141 struct III_sideinfo | |
| 142 { | |
| 143 unsigned main_data_begin; | |
| 144 unsigned private_bits; | |
| 145 struct { | |
| 146 struct gr_info_s gr[2]; | |
| 147 } ch[2]; | |
| 148 }; | |
| 149 | |
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150 |
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151 extern int synth_1to1 (real *,int,unsigned char *,int *,struct mpstr *); |
| 261 | 152 extern int synth_1to1_8bit (real *,int,unsigned char *,int *); |
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153 extern int synth_1to1_mono (real *,unsigned char *,int *,struct mpstr *); |
| 261 | 154 extern int synth_1to1_mono2stereo (real *,unsigned char *,int *); |
| 155 extern int synth_1to1_8bit_mono (real *,unsigned char *,int *); | |
| 156 extern int synth_1to1_8bit_mono2stereo (real *,unsigned char *,int *); | |
| 157 | |
| 158 extern int synth_2to1 (real *,int,unsigned char *,int *); | |
| 159 extern int synth_2to1_8bit (real *,int,unsigned char *,int *); | |
| 160 extern int synth_2to1_mono (real *,unsigned char *,int *); | |
| 161 extern int synth_2to1_mono2stereo (real *,unsigned char *,int *); | |
| 162 extern int synth_2to1_8bit_mono (real *,unsigned char *,int *); | |
| 163 extern int synth_2to1_8bit_mono2stereo (real *,unsigned char *,int *); | |
| 164 | |
| 165 extern int synth_4to1 (real *,int,unsigned char *,int *); | |
| 166 extern int synth_4to1_8bit (real *,int,unsigned char *,int *); | |
| 167 extern int synth_4to1_mono (real *,unsigned char *,int *); | |
| 168 extern int synth_4to1_mono2stereo (real *,unsigned char *,int *); | |
| 169 extern int synth_4to1_8bit_mono (real *,unsigned char *,int *); | |
| 170 extern int synth_4to1_8bit_mono2stereo (real *,unsigned char *,int *); | |
| 171 | |
| 172 extern int synth_ntom (real *,int,unsigned char *,int *); | |
| 173 extern int synth_ntom_8bit (real *,int,unsigned char *,int *); | |
| 174 extern int synth_ntom_mono (real *,unsigned char *,int *); | |
| 175 extern int synth_ntom_mono2stereo (real *,unsigned char *,int *); | |
| 176 extern int synth_ntom_8bit_mono (real *,unsigned char *,int *); | |
| 177 extern int synth_ntom_8bit_mono2stereo (real *,unsigned char *,int *); | |
| 178 | |
| 179 extern void rewindNbits(int bits); | |
| 180 extern int hsstell(void); | |
| 181 extern int get_songlen(struct frame *fr,int no); | |
| 182 | |
| 183 extern void init_layer3(int); | |
| 184 extern void init_layer2(void); | |
| 185 extern void make_decode_tables(long scale); | |
| 186 extern void make_conv16to8_table(int); | |
| 187 extern void dct64(real *,real *,real *); | |
| 188 | |
| 189 extern void synth_ntom_set_step(long,long); | |
| 190 | |
| 191 extern unsigned char *conv16to8; | |
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Cleanups and audio format determination.
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192 extern long mpglib_freqs[9]; |
| 261 | 193 extern real muls[27][64]; |
| 194 extern real decwin[512+32]; | |
| 195 extern real *pnts[5]; | |
| 196 | |
| 197 extern struct parameter param; | |
| 198 | |
| 199 |