68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* FluidSynth - A Software Synthesizer
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*
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* Copyright (C) 2003 Peter Hanappe and others.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef _FLUID_GEN_H
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#define _FLUID_GEN_H
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#include "fluidsynth_priv.h"
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typedef struct _fluid_gen_info_t
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{
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char num; /* Generator number */
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char const *name;
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char init; /* Does the generator need to be initialized (not used) */
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char nrpn_scale; /* The scale to convert from NRPN (cfr. fluid_gen_map_nrpn()) */
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float min; /* The minimum value */
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float max; /* The maximum value */
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float def; /* The default value (cfr. fluid_gen_init()) */
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} fluid_gen_info_t;
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/*
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* SoundFont generator structure.
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*/
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typedef struct _fluid_gen_t
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{
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unsigned char flags; /**< Is the generator set or not (#fluid_gen_flags) */
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double val; /**< The nominal value */
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double mod; /**< Change by modulators */
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double nrpn; /**< Change by NRPN messages */
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} fluid_gen_t;
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/*
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* Enum value for 'flags' field of #fluid_gen_t (not really flags).
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*/
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enum fluid_gen_flags
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{
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GEN_UNUSED, /**< Generator value is not set */
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GEN_SET, /**< Generator value is set */
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};
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#define fluid_gen_set_mod(_gen, _val) { (_gen)->mod = (double) (_val); }
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#define fluid_gen_set_nrpn(_gen, _val) { (_gen)->nrpn = (double) (_val); }
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fluid_real_t fluid_gen_scale(int gen, float value);
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fluid_real_t fluid_gen_scale_nrpn(int gen, int nrpn);
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void fluid_gen_init(fluid_gen_t *gen, fluid_channel_t *channel);
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const char *fluid_gen_name(int gen);
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#endif /* _FLUID_GEN_H */
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