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/* BSE - Better Sound Engine
* Copyright (C) 1997-2004 Tim Janik
*
* 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.
*
* A copy of the GNU Lesser General Public License should ship along
* with this library; if not, see http://www.gnu.org/copyleft/.
*/
#ifndef __BSE_CONST_VALUES_H__
#define __BSE_CONST_VALUES_H__
#include <bse/bsedefs.h>
G_BEGIN_DECLS
/* --- frequencies --- */
/* kammer frequency, frequency of the note A of the standard piano
* octave.slightly different values are used in different countries,
* however, 440Hz is the official value for germany and much of europe.
*/
#define BSE_KAMMER_FREQUENCY (440.0)
/* maximum (audible) frequency represented in synthesis signals.
* this value shouldn't be changed, to maintain frequency
* representation in signals.
*/
#define BSE_MAX_FREQUENCY (24000.0)
/* minimum (needs to be > 0) and maximum audible frequencies supported
* by oscillators (outer limits for user supplied frequency values)
*/
#define BSE_MAX_OSC_FREQUENCY (20000.0)
#define BSE_MIN_OSC_FREQUENCY (1.0 / BSE_MAX_OSC_FREQUENCY)
/* epsilon used to compare audible frequencies and check for equality */
#define BSE_FREQUENCY_EPSILON (0.001)
/* --- transpose / fine tune --- */
#define BSE_MIN_TRANSPOSE (-72)
#define BSE_MAX_TRANSPOSE (+72)
#define BSE_TRANSPOSE_IS_VALID(n) ((n) >= BSE_MIN_TRANSPOSE && (n) <= BSE_MAX_TRANSPOSE)
/* fine tune in cents of a semitone */
#define BSE_MIN_FINE_TUNE (-BSE_MAX_FINE_TUNE)
#define BSE_MAX_FINE_TUNE (+100)
#define BSE_FINE_TUNE_IS_VALID(n) ((n) >= BSE_MIN_FINE_TUNE && (n) <= BSE_MAX_FINE_TUNE)
/* --- signal ranges --- */
/* min..max sample value: -1.0 .. 1.0
* notes<->sample value: 0 .. 127 (BSE_VALUE_FROM_NOTE)
* freq<->sample value: 0 .. 24000 (BSE_FREQ_FROM_VALUE)
*/
#define BSE_FREQ_FROM_VALUE(value) (BSE_MAX_FREQUENCY * (value))
#define BSE_VALUE_FROM_FREQ(freq) ((1.0 / BSE_MAX_FREQUENCY) * (freq))
#define BSE_FREQUENCY_EPSILON (0.001)
/* --- volume --- */
#define BSE_MIN_VOLUME_dB (-144) /* theoretically: -96.3 */
#define BSE_MAX_VOLUME_dB (+24)
/* --- balance (left/right volume) --- */
#define BSE_MIN_BALANCE (-100.0)
#define BSE_MAX_BALANCE (+100.0)
/* --- bpm --- */
#define BSE_MIN_BPM (1)
#define BSE_MAX_BPM (1024)
/* --- time (unix seconds) --- */
#define BSE_MIN_TIME (631148400) /* 1990-01-01 00:00:00 */
#define BSE_MAX_TIME (2147483647) /* 2038-01-19 04:14:07 */
/* --- BseSource limits --- */
#define BSE_MAX_N_ICHANNELS (32)
#define BSE_MAX_N_OCHANNELS (32)
/* --- miscellaneous --- */
#define BSE_MAGIC (('B' << 24) | ('S' << 16) | \
/* 1112753441 0x42534521 */ ('E' << 8) | ('!' << 0))
/* driver rating */
#define BSE_RATING_PREFERRED (100)
#define BSE_RATING_DEFAULT (50)
#define BSE_RATING_FALLBACK (1)
#define BSE_RATING_NO_AUTO (-1)
G_END_DECLS
#endif /* __BSE_CONST_VALUES_H__ */
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