File: common.h

package info (click to toggle)
twolame 0.3.13-4
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 2,800 kB
  • sloc: sh: 11,099; ansic: 9,332; perl: 286; makefile: 171
file content (375 lines) | stat: -rw-r--r-- 11,133 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
/*
 *	TwoLAME: an optimized MPEG Audio Layer Two encoder
 *
 *	Copyright (C) 2001-2004 Michael Cheng
 *	Copyright (C) 2004-2006 The TwoLAME Project
 *
 *	This library is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU Lesser General Public
 *	License as published by the Free Software Foundation; either
 *	version 2.1 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
 *	Lesser General Public License for more details.
 *
 *	You should have received a copy of the GNU Lesser General Public
 *	License along with this library; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  $Id$
 *
 */


#ifndef _COMMON_H
#define _COMMON_H

#ifdef _WIN32
# include "../win32/configwin.h"
#else
# include "config.h"
#endif

#include "twolame.h"



/***************************************************************************************
 Common Definitions
****************************************************************************************/

#ifndef FLOAT
#define			FLOAT					double
#endif

#define			NULL_CHAR				'\0'

#define			MAX_U_32_NUM			0xFFFFFFFF
#ifndef PI
#define			PI						3.14159265358979
#endif
#ifndef E
#define			E						2.71828182845
#endif
#define			PI2						PI/2
#define			PI4						PI/4
#define			PI64					PI/64
#define			LN_TO_LOG10				0.2302585093

#define			BITS_IN_A_BYTE			8
#define			WORD					16
#define			MAX_NAME_SIZE			255
#define			SBLIMIT					32
#define			SSLIMIT					18
#define			FFT_SIZE				1024
#define			HAN_SIZE				512
#define			SCALE_BLOCK				12
#define			SCALE_RANGE				64
#define			SCALE					32768
#define			CRC16_POLYNOMIAL		0x8005
#define			CRC8_POLYNOMIAL			0x1D

#define			MIN(A, B)		((A) < (B) ? (A) : (B))
#define			MAX(A, B)		((A) > (B) ? (A) : (B))


/* This is the smallest MNR a subband can have before it is counted
   as 'noisy' by the logic which chooses the number of JS subbands */

#define NOISY_MIN_MNR	0.0


/***************************************************************************************
  Psychacoustic Model 1/3 Definitions
****************************************************************************************/

#define NOISE			10
#define TONE			20
#define DBMIN			-200.0
#define LAST			-1
#define STOP			-100
#define POWERNORM		90.3090 /* = 20 * log10(32768) to normalize */
/* max output power to 96 dB per spec */


/***************************************************************************************
  Psychoacoustic Model 2/4 Definitions
****************************************************************************************/
#define LXMIN			32.0



/***************************************************************************************
psycho 0 mem struct
****************************************************************************************/

typedef struct psycho_0_mem_struct {
    FLOAT ath_min[SBLIMIT];
} psycho_0_mem;



/***************************************************************************************
psycho 1 mem struct
****************************************************************************************/
#define DBTAB 1000

typedef struct {
    int line;
    FLOAT bark, hear, x;
} g_thres, *g_ptr;

typedef struct {
    FLOAT x;
    int type, next, map;
} mask, *mask_ptr;

typedef struct psycho_1_mem_struct {
    int off[2];
    FLOAT fft_buf[2][1408];
    int *cbound;
    int crit_band;
    int sub_size;
    mask_ptr power;
    g_ptr ltg;
    FLOAT dbtable[DBTAB];
} psycho_1_mem;



/***************************************************************************************
Psycho3 memory structure
****************************************************************************************/
#define HBLKSIZE 513

#define SUBSIZE 136
typedef struct psycho_3_mem_struct {
    int off[2];
    int freq_subset[SUBSIZE];
    FLOAT bark[HBLKSIZE];
    FLOAT ath[HBLKSIZE];
    FLOAT fft_buf[2][1408];
#define CRITBANDMAX 32          /* this is much higher than it needs to be. really only about 24 */
    int cbands;                 /* How many critical bands there really are */
    int cbandindex[CRITBANDMAX];    /* The spectral line index of the start of each critical band */
    FLOAT dbtable[DBTAB];
} psycho_3_mem;



/***************************************************************************************
Psycho2 & 4 memory structure
****************************************************************************************/

#define LOGBLKSIZE		10
#define BLKSIZE			1024
#define HBLKSIZE		513
#define CBANDS			64
#define TRIGTABLESIZE	6284
#define TRIGTABLESCALE	2000.0
typedef int ICB[CBANDS];
typedef int IHBLK[HBLKSIZE];
typedef FLOAT F32[32];
typedef FLOAT F2_32[2][32];
typedef FLOAT FCB[CBANDS];
typedef FLOAT FCBCB[CBANDS][CBANDS];
typedef FLOAT FBLK[BLKSIZE];
typedef FLOAT FHBLK[HBLKSIZE];
typedef FLOAT F2HBLK[2][HBLKSIZE];
typedef FLOAT F22HBLK[2][2][HBLKSIZE];
typedef FLOAT DCB[CBANDS];

typedef struct psycho_4_mem_struct {
    int new;
    int old;
    int oldest;

    int flush;
    int sync_flush;
    int syncsize;

    FLOAT grouped_c[CBANDS];
    FLOAT grouped_e[CBANDS];
    FLOAT nb[CBANDS];
    FLOAT cb[CBANDS];
    FLOAT tb[CBANDS];
    FLOAT ecb[CBANDS];
    FLOAT bc[CBANDS];
    FLOAT cbval[CBANDS];
    FLOAT rnorm[CBANDS];
    FLOAT wsamp_r[BLKSIZE], phi[BLKSIZE], energy[BLKSIZE], window[BLKSIZE];
    FLOAT ath[HBLKSIZE], thr[HBLKSIZE], c[HBLKSIZE];
    FLOAT fthr[HBLKSIZE], absthr[HBLKSIZE]; // psy2 only
    int numlines[CBANDS];
    int partition[HBLKSIZE];
    FLOAT *tmn;
    FCB *s;
    FHBLK *lthr;
    F2HBLK *r, *phi_sav;
    FLOAT snrtmp[2][32];
    FLOAT cos_table[TRIGTABLESIZE];
} psycho_4_mem, psycho_2_mem;


/***************************************************************************************
 Subband utility structures
****************************************************************************************/

typedef struct subband_mem_struct {
    FLOAT x[2][512];
    FLOAT m[16][32];
    int off[2];
    int half[2];
} subband_mem;



/***************************************************************************************
 Header and frame information
****************************************************************************************/

/* Raw Header Information Structure */
typedef struct {
    int version;
    int lay;
    int error_protection;
    int bitrate_index;
    int samplerate_idx;
    int padding;
    int private_bit;
    int mode;
    int mode_ext;
    int copyright;
    int original;
    int emphasis;
} frame_header;



typedef unsigned int subband_t[2][3][SCALE_BLOCK][SBLIMIT];
typedef FLOAT jsb_sample_t[3][SCALE_BLOCK][SBLIMIT];
typedef FLOAT sb_sample_t[2][3][SCALE_BLOCK][SBLIMIT];



/***************************************************************************************
 twolame Global Options structure.
 Defaults shown in []
 ++ means it is an advanced option. Only use it if you know what you're doing.	  
****************************************************************************************/
struct twolame_options_struct {
    // Input PCM audio File Information
    int samplerate_in;          // mpeg1: 32000 [44100] 48000 
    // mpeg2: 16000 22050 24000 
    int samplerate_out;
    int num_channels_in;        // Number of channels on the input stream
    int num_channels_out;       // Number of channels on the output stream

    // Output MP2 File Information
    TWOLAME_MPEG_version version;   // 0 mpeg2 [1] mpeg1 
    int bitrate;                // for mpeg1:32, 48, 56, 64, 80, 96,112,128,160,[192], 224, 256,
    // 320, 384 
    // for mpeg2: 8, 16, 24, 32, 40, 48, 56, 64, 80, [96], 112, 128, 144, 160 
    TWOLAME_MPEG_mode mode;
    TWOLAME_Padding padding;    // [PAD_NO] 
    int do_energy_levels;       // Write energy level information into the end of the frame [FALSE]
    int num_ancillary_bits;     // Number of reserved ancillary bits [0] (Currently only available
    // for non-VBR modes)

    // Psychoacoustic Model options
    int psymodel;               // -1, 0, 1, 2, [3], 4 Psy model number
    FLOAT athlevel;             // Adjust the Absolute Threshold of Hearing curve by [0] dB
    int quickmode;              // Only calculate psy model ever X frames [FALSE] 
    int quickcount;             // Only calculate psy model every [10] frames

    // VBR Options
    int vbr;                    // turn on VBR mode TRUE [FALSE] 
    int vbr_upper_index;        // ++ [0] means no upper bitrate set for VBR mode. valid 1-15
    // depending on mode
    int vbr_max_bitrate;
    FLOAT vbrlevel;             // Set VBR quality. [0.0] (sensible range -10.0 -> 10.0)

    // Miscellaneous Options That Nobody Ever Uses
    TWOLAME_Emphasis emphasis;  // [n]one, 5(50/15 microseconds), c(ccitt j.17) 
    int copyright;              // [FALSE] 
    int original;               // [FALSE] 
    int private_bit;            // [0] Your very own bit in the header.
    int error_protection;       // [FALSE] 

    // Digital Audio Broadcasting Extensions
    unsigned int do_dab;        // Allocate space for the DigitalAudioBroadcasting info [FALSE] 
    unsigned int dab_crc_len;   // Number of CRC bytes for DAB [2], 4 
    unsigned int dab_crc[4];    // DAB CRC bytes are inserted here. User must insert them in frame
    unsigned int dab_xpad_len;  // Number of bytes in the XPAD

    // Processing Options
    int verbosity;              // Verbosity of output 0(never output a thing) [2] 100(output
    // everything)


    // Scaling
    FLOAT scale;
    FLOAT scale_left;
    FLOAT scale_right;



    // Bit allocation stuff
    int lower_index;
    int upper_index;
    int bitrateindextobits[15];
    int vbr_frame_count;        // Used for debugging VBR


    // Used by twolame_encode_frame
    int twolame_init;
    short int buffer[2][TWOLAME_SAMPLES_PER_FRAME]; // Sample buffer
    unsigned int samples_in_buffer; // Number of samples currently in buffer
    unsigned int psycount;
    unsigned int num_crc_bits;  // Number of bits CRC is calculated on

    unsigned int bit_alloc[2][SBLIMIT];
    unsigned int scfsi[2][SBLIMIT];
    unsigned int scalar[2][3][SBLIMIT];
    unsigned int j_scale[3][SBLIMIT];
    FLOAT smrdef[2][32];
    FLOAT smr[2][SBLIMIT];
    FLOAT max_sc[2][SBLIMIT];

    subband_t *subband;
    jsb_sample_t *j_sample;
    sb_sample_t *sb_sample;



    /* Resampling stuff */
    FLOAT resample_ratio;
    void *resample_handle[2];


    // memory for psycho models
    psycho_0_mem *p0mem;
    psycho_1_mem *p1mem;
    psycho_2_mem *p2mem;
    psycho_3_mem *p3mem;
    psycho_4_mem *p4mem;


    // memory for subband
    subband_mem smem;

    // Frame info
    frame_header header;
    int jsbound;                // first band of joint stereo coding
    int sblimit;                // total number of sub bands
    int tablenum;

    int vbrstats[15];
};

#endif                          // _COMMON_H


// vim:ts=4:sw=4:nowrap: