This file is indexed.

/usr/include/bs2b/bs2b.h is in libbs2b-dev 3.1.0+dfsg-2.2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
/*-
 * Copyright (c) 2005 Boris Mikhaylov
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef BS2B_H
#define BS2B_H

#include "bs2bversion.h"
#include "bs2btypes.h"

/* Minimum/maximum sample rate (Hz) */
#define BS2B_MINSRATE 2000
#define BS2B_MAXSRATE 384000

/* Minimum/maximum cut frequency (Hz) */
/* bs2b_set_level_fcut() */
#define BS2B_MINFCUT 300
#define BS2B_MAXFCUT 2000

/* Minimum/maximum feed level (dB * 10 @ low frequencies) */
/* bs2b_set_level_feed() */
#define BS2B_MINFEED 10   /* 1 dB */
#define BS2B_MAXFEED 150  /* 15 dB */

/* Normal crossfeed levels (Obsolete) */
#define BS2B_HIGH_CLEVEL     ( ( uint32_t )700 | ( ( uint32_t )30 << 16 ) )
#define BS2B_MIDDLE_CLEVEL   ( ( uint32_t )500 | ( ( uint32_t )45 << 16 ) )
#define BS2B_LOW_CLEVEL      ( ( uint32_t )360 | ( ( uint32_t )60 << 16 ) )

/* Easy crossfeed levels (Obsolete) */
#define BS2B_HIGH_ECLEVEL    ( ( uint32_t )700 | ( ( uint32_t )60 << 16 ) )
#define BS2B_MIDDLE_ECLEVEL  ( ( uint32_t )500 | ( ( uint32_t )72 << 16 ) )
#define BS2B_LOW_ECLEVEL     ( ( uint32_t )360 | ( ( uint32_t )84 << 16 ) )

/* Default crossfeed levels */
/* bs2b_set_level() */
#define BS2B_DEFAULT_CLEVEL  ( ( uint32_t )700 | ( ( uint32_t )45 << 16 ) )
#define BS2B_CMOY_CLEVEL     ( ( uint32_t )700 | ( ( uint32_t )60 << 16 ) )
#define BS2B_JMEIER_CLEVEL   ( ( uint32_t )650 | ( ( uint32_t )95 << 16 ) )

/* Default sample rate (Hz) */
#define BS2B_DEFAULT_SRATE   44100

/* A delay at low frequency by microseconds according to cut frequency */
#define bs2b_level_delay( fcut ) ( ( 18700 / fcut ) * 10 )

typedef struct
{
	uint32_t level;              /* Crossfeed level */
	uint32_t srate;              /* Sample rate (Hz) */
	double a0_lo, b1_lo;         /* Lowpass IIR filter coefficients */
	double a0_hi, a1_hi, b1_hi;  /* Highboost IIR filter coefficients */
	double gain;                 /* Global gain against overloading */
	/* Buffer of last filtered sample: [0] 1-st channel, [1] 2-d channel */
	struct { double asis[ 2 ], lo[ 2 ], hi[ 2 ]; } lfs;
} t_bs2bd;

typedef t_bs2bd *t_bs2bdp;

#ifdef __cplusplus
extern "C"
{
#endif	/* __cplusplus */

/* Allocates and sets a data to defaults.
 * Return NULL on error.
 */
t_bs2bdp bs2b_open( void );

/* Close */
void bs2b_close( t_bs2bdp bs2bdp );

/* Sets a new coefficients by new crossfeed value.
 * level = ( ( uint32_t )fcut | ( ( uint32_t )feed << 16 ) )
 * where 'feed' is crossfeeding level at low frequencies (dB * 10)
 * and 'fcut' is cut frecuency (Hz)
 */
void bs2b_set_level( t_bs2bdp bs2bdp, uint32_t level );

/* Return a current crossfeed level value. */
uint32_t bs2b_get_level( t_bs2bdp bs2bdp );

/* Sets a new coefficients by new cut frecuency value (Hz). */
void bs2b_set_level_fcut( t_bs2bdp bs2bdp, int fcut );

/* Return a current cut frecuency value (Hz). */
int bs2b_get_level_fcut( t_bs2bdp bs2bdp );

/* Sets a new coefficients by new crossfeeding level value (dB * 10). */
void bs2b_set_level_feed( t_bs2bdp bs2bdp, int feed );

/* Return a current crossfeeding level value (dB * 10). */
int bs2b_get_level_feed( t_bs2bdp bs2bdp );

/* Return a current delay value at low frequencies (micro seconds). */
int bs2b_get_level_delay( t_bs2bdp bs2bdp );

/* Clear buffers and sets a new coefficients with new sample rate value.
 * srate - sample rate by Hz.
 */
void bs2b_set_srate( t_bs2bdp bs2bdp, uint32_t srate );

/* Return current sample rate value */
uint32_t bs2b_get_srate( t_bs2bdp bs2bdp );

/* Clear buffer */
void bs2b_clear( t_bs2bdp bs2bdp );

/* Return 1 if buffer is clear */
int bs2b_is_clear( t_bs2bdp bs2bdp );

/* Return bs2b version string */
char const *bs2b_runtime_version( void );

/* Return bs2b version integer */
uint32_t bs2b_runtime_version_int( void );

/* 'bs2b_cross_feed_*' crossfeeds buffer of 'n' stereo samples
 * pointed by 'sample'.
 * sample[i]   - first channel,
 * sample[i+1] - second channel.
 * Where 'i' is ( i = 0; i < n * 2; i += 2 )
 */

/* sample poits to double floats native endians */
void bs2b_cross_feed_d( t_bs2bdp bs2bdp, double *sample, int n );

/* sample poits to double floats big endians */
void bs2b_cross_feed_dbe( t_bs2bdp bs2bdp, double *sample, int n );

/* sample poits to double floats little endians */
void bs2b_cross_feed_dle( t_bs2bdp bs2bdp, double *sample, int n );

/* sample poits to floats native endians */
void bs2b_cross_feed_f( t_bs2bdp bs2bdp, float *sample, int n );

/* sample poits to floats big endians */
void bs2b_cross_feed_fbe( t_bs2bdp bs2bdp, float *sample, int n );

/* sample poits to floats little endians */
void bs2b_cross_feed_fle( t_bs2bdp bs2bdp, float *sample, int n );

/* sample poits to 32bit signed integers native endians */
void bs2b_cross_feed_s32( t_bs2bdp bs2bdp, int32_t *sample, int n );

/* sample poits to 32bit unsigned integers native endians */
void bs2b_cross_feed_u32( t_bs2bdp bs2bdp, uint32_t *sample, int n );

/* sample poits to 32bit signed integers big endians */
void bs2b_cross_feed_s32be( t_bs2bdp bs2bdp, int32_t *sample, int n );

/* sample poits to 32bit unsigned integers big endians */
void bs2b_cross_feed_u32be( t_bs2bdp bs2bdp, uint32_t *sample, int n );

/* sample poits to 32bit signed integers little endians */
void bs2b_cross_feed_s32le( t_bs2bdp bs2bdp, int32_t *sample, int n );

/* sample poits to 32bit unsigned integers little endians */
void bs2b_cross_feed_u32le( t_bs2bdp bs2bdp, uint32_t *sample, int n );

/* sample poits to 16bit signed integers native endians */
void bs2b_cross_feed_s16( t_bs2bdp bs2bdp, int16_t *sample, int n );

/* sample poits to 16bit unsigned integers native endians */
void bs2b_cross_feed_u16( t_bs2bdp bs2bdp, uint16_t *sample, int n );

/* sample poits to 16bit signed integers big endians */
void bs2b_cross_feed_s16be( t_bs2bdp bs2bdp, int16_t *sample, int n );

/* sample poits to 16bit unsigned integers big endians */
void bs2b_cross_feed_u16be( t_bs2bdp bs2bdp, uint16_t *sample, int n );

/* sample poits to 16bit signed integers little endians */
void bs2b_cross_feed_s16le( t_bs2bdp bs2bdp, int16_t *sample, int n );

/* sample poits to 16bit unsigned integers little endians */
void bs2b_cross_feed_u16le( t_bs2bdp bs2bdp, uint16_t *sample, int n );

/* sample poits to 8bit signed integers */
void bs2b_cross_feed_s8( t_bs2bdp bs2bdp, int8_t *sample, int n );

/* sample poits to 8bit unsigned integers */
void bs2b_cross_feed_u8( t_bs2bdp bs2bdp, uint8_t *sample, int n );

/* sample poits to 24bit signed integers native endians */
void bs2b_cross_feed_s24( t_bs2bdp bs2bdp, bs2b_int24_t *sample, int n );

/* sample poits to 24bit unsigned integers native endians */
void bs2b_cross_feed_u24( t_bs2bdp bs2bdp, bs2b_uint24_t *sample, int n );

/* sample poits to 24bit signed integers be endians */
void bs2b_cross_feed_s24be( t_bs2bdp bs2bdp, bs2b_int24_t *sample, int n );

/* sample poits to 24bit unsigned integers be endians */
void bs2b_cross_feed_u24be( t_bs2bdp bs2bdp, bs2b_uint24_t *sample, int n );

/* sample poits to 24bit signed integers little endians */
void bs2b_cross_feed_s24le( t_bs2bdp bs2bdp, bs2b_int24_t *sample, int n );

/* sample poits to 24bit unsigned integers little endians */
void bs2b_cross_feed_u24le( t_bs2bdp bs2bdp, bs2b_uint24_t *sample, int n );

#ifdef __cplusplus
}	/* extern "C" */
#endif /* __cplusplus */

#endif	/* BS2B_H */