Mercurial > SDL_sound_CoreAudio

comparison decoders/mpglib/mpg123_sdlsound.h @ 261:9b6e82f7c853

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Initial add.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 21 Feb 2002 19:46:09 +0000
parents
children 52b9f37998db
comparison
equal deleted inserted replaced
260:44a4730a1e6f 261:9b6e82f7c853
1 #include <stdio.h>
2 #include <string.h>
3 #include <signal.h>
4
5 #ifndef WIN32
6 #include <sys/signal.h>
7 #include <unistd.h>
8 #endif
9
10 #include <math.h>
11
12 #ifdef _WIN32
13 # undef WIN32
14 # define WIN32
15
16 # define M_PI 3.14159265358979323846
17 # define M_SQRT2 1.41421356237309504880
18 # define REAL_IS_FLOAT
19 # define NEW_DCT9
20
21 # define random rand
22 # define srandom srand
23
24 #endif
25
26 #ifdef REAL_IS_FLOAT
27 # define real float
28 #elif defined(REAL_IS_LONG_DOUBLE)
29 # define real long double
30 #else
31 # define real double
32 #endif
33
34 #ifdef __GNUC__
35 #define INLINE inline
36 #else
37 #define INLINE
38 #endif
39
40 /* AUDIOBUFSIZE = n*64 with n=1,2,3 ... */
41 #define AUDIOBUFSIZE 16384
42
43 #ifndef FALSE
44 #define FALSE 0
45 #endif
46 #ifndef FALSE
47 #define TRUE 1
48 #endif
49
50 #define SBLIMIT 32
51 #define SSLIMIT 18
52
53 #define SCALE_BLOCK 12
54
55
56 #define MPG_MD_STEREO 0
57 #define MPG_MD_JOINT_STEREO 1
58 #define MPG_MD_DUAL_CHANNEL 2
59 #define MPG_MD_MONO 3
60
61 #define MAXFRAMESIZE 1792
62
63
64 /* Pre Shift fo 16 to 8 bit converter table */
65 #define AUSHIFT (3)
66
67 struct frame {
68 int stereo;
69 int jsbound;
70 int single;
71 int lsf;
72 int mpeg25;
73 int header_change;
74 int lay;
75 int error_protection;
76 int bitrate_index;
77 int sampling_frequency;
78 int padding;
79 int extension;
80 int mode;
81 int mode_ext;
82 int copyright;
83 int original;
84 int emphasis;
85 int framesize; /* computed framesize */
86
87 /* layer2 stuff */
88 int II_sblimit;
89 void *alloc;
90 };
91
92 struct parameter {
93 int quiet; /* shut up! */
94 int tryresync; /* resync stream after error */
95 int verbose; /* verbose level */
96 int checkrange;
97 };
98
99 extern unsigned int get1bit(void);
100 extern unsigned int getbits(int);
101 extern unsigned int getbits_fast(int);
102 extern int set_pointer(long);
103
104 extern unsigned char *wordpointer;
105 extern int bitindex;
106
107 extern void make_decode_tables(long scaleval);
108 extern int do_layer3(struct frame *fr,unsigned char *,int *);
109 extern int do_layer2(struct frame *fr,unsigned char *,int *);
110 extern int do_layer1(struct frame *fr,unsigned char *,int *);
111 extern int decode_header(struct frame *fr,unsigned long newhead);
112
113
114
115 struct gr_info_s {
116 int scfsi;
117 unsigned part2_3_length;
118 unsigned big_values;
119 unsigned scalefac_compress;
120 unsigned block_type;
121 unsigned mixed_block_flag;
122 unsigned table_select[3];
123 unsigned subblock_gain[3];
124 unsigned maxband[3];
125 unsigned maxbandl;
126 unsigned maxb;
127 unsigned region1start;
128 unsigned region2start;
129 unsigned preflag;
130 unsigned scalefac_scale;
131 unsigned count1table_select;
132 real *full_gain[3];
133 real *pow2gain;
134 };
135
136 struct III_sideinfo
137 {
138 unsigned main_data_begin;
139 unsigned private_bits;
140 struct {
141 struct gr_info_s gr[2];
142 } ch[2];
143 };
144
145 extern int synth_1to1 (real *,int,unsigned char *,int *);
146 extern int synth_1to1_8bit (real *,int,unsigned char *,int *);
147 extern int synth_1to1_mono (real *,unsigned char *,int *);
148 extern int synth_1to1_mono2stereo (real *,unsigned char *,int *);
149 extern int synth_1to1_8bit_mono (real *,unsigned char *,int *);
150 extern int synth_1to1_8bit_mono2stereo (real *,unsigned char *,int *);
151
152 extern int synth_2to1 (real *,int,unsigned char *,int *);
153 extern int synth_2to1_8bit (real *,int,unsigned char *,int *);
154 extern int synth_2to1_mono (real *,unsigned char *,int *);
155 extern int synth_2to1_mono2stereo (real *,unsigned char *,int *);
156 extern int synth_2to1_8bit_mono (real *,unsigned char *,int *);
157 extern int synth_2to1_8bit_mono2stereo (real *,unsigned char *,int *);
158
159 extern int synth_4to1 (real *,int,unsigned char *,int *);
160 extern int synth_4to1_8bit (real *,int,unsigned char *,int *);
161 extern int synth_4to1_mono (real *,unsigned char *,int *);
162 extern int synth_4to1_mono2stereo (real *,unsigned char *,int *);
163 extern int synth_4to1_8bit_mono (real *,unsigned char *,int *);
164 extern int synth_4to1_8bit_mono2stereo (real *,unsigned char *,int *);
165
166 extern int synth_ntom (real *,int,unsigned char *,int *);
167 extern int synth_ntom_8bit (real *,int,unsigned char *,int *);
168 extern int synth_ntom_mono (real *,unsigned char *,int *);
169 extern int synth_ntom_mono2stereo (real *,unsigned char *,int *);
170 extern int synth_ntom_8bit_mono (real *,unsigned char *,int *);
171 extern int synth_ntom_8bit_mono2stereo (real *,unsigned char *,int *);
172
173 extern void rewindNbits(int bits);
174 extern int hsstell(void);
175 extern int get_songlen(struct frame *fr,int no);
176
177 extern void init_layer3(int);
178 extern void init_layer2(void);
179 extern void make_decode_tables(long scale);
180 extern void make_conv16to8_table(int);
181 extern void dct64(real *,real *,real *);
182
183 extern void synth_ntom_set_step(long,long);
184
185 extern unsigned char *conv16to8;
186 extern long freqs[9];
187 extern real muls[27][64];
188 extern real decwin[512+32];
189 extern real *pnts[5];
190
191 extern struct parameter param;
192
193