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2814f73c87
* a shared library is built, no audio driver is included * implemented some platform specific functions (fluid_sys.*) * a test app is provided in fluidsynth.c * on target Haiku, posix mutex are used, else mutexes are implemented with simple semaphores (I could be wrong here) well I hope it can provide a good enough backend for a softsynth Note that needed SF2 banks would probably not be included. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17799 a95241bf-73f2-0310-859d-f6bbb57e9c96
98 lines
3.3 KiB
C
98 lines
3.3 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 Library General Public License
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* as published by the Free Software Foundation; either version 2 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307, USA
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*/
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#ifndef _FLUIDSYNTH_VOICE_H
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#define _FLUIDSYNTH_VOICE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* The interface to the synthesizer's voices
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* Examples on using them can be found in fluid_defsfont.c
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*/
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/** Update all the synthesis parameters, which depend on generator gen.
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This is only necessary after changing a generator of an already operating voice.
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Most applications will not need this function.*/
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FLUIDSYNTH_API void fluid_voice_update_param(fluid_voice_t* voice, int gen);
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/* for fluid_voice_add_mod */
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enum fluid_voice_add_mod{
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FLUID_VOICE_OVERWRITE,
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FLUID_VOICE_ADD,
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FLUID_VOICE_DEFAULT
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};
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/* Add a modulator to a voice (SF2.1 only). */
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FLUIDSYNTH_API void fluid_voice_add_mod(fluid_voice_t* voice, fluid_mod_t* mod, int mode);
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/** Set the value of a generator */
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FLUIDSYNTH_API void fluid_voice_gen_set(fluid_voice_t* voice, int gen, float val);
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/** Get the value of a generator */
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FLUIDSYNTH_API float fluid_voice_gen_get(fluid_voice_t* voice, int gen);
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/** Modify the value of a generator by val */
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FLUIDSYNTH_API void fluid_voice_gen_incr(fluid_voice_t* voice, int gen, float val);
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/** Return the unique ID of the noteon-event. A sound font loader
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* may store the voice processes it has created for * real-time
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* control during the operation of a voice (for example: parameter
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* changes in sound font editor). The synth uses a pool of
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* voices, which are 'recycled' and never deallocated.
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*
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* Before modifying an existing voice, check
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* - that its state is still 'playing'
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* - that the ID is still the same
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* Otherwise the voice has finished playing.
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*/
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FLUIDSYNTH_API unsigned int fluid_voice_get_id(fluid_voice_t* voice);
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FLUIDSYNTH_API int fluid_voice_is_playing(fluid_voice_t* voice);
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/** If the peak volume during the loop is known, then the voice can
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* be released earlier during the release phase. Otherwise, the
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* voice will operate (inaudibly), until the envelope is at the
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* nominal turnoff point. In many cases the loop volume is many dB
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* below the maximum volume. For example, the loop volume for a
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* typical acoustic piano is 20 dB below max. Taking that into
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* account in the turn-off algorithm we can save 20 dB / 100 dB =>
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* 1/5 of the total release time.
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* So it's a good idea to call fluid_voice_optimize_sample
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* on each sample once.
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*/
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FLUIDSYNTH_API int fluid_voice_optimize_sample(fluid_sample_t* s);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FLUIDSYNTH_VOICE_H */
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