fluid_gen.c
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上传日期：2020-08-17
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- /* FluidSynth - A Software Synthesizer
- *
- * Copyright (C) 2003 Peter Hanappe and others.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public License
- * as published by the Free Software Foundation; either version 2 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- * 02111-1307, USA
- */
- #include "fluid_gen.h"
- #include "fluid_chan.h"
- /* See SFSpec21 $8.1.3 */
- fluid_gen_info_t fluid_gen_info[] = {
- /* number/name init scale min max def */
- { GEN_STARTADDROFS, 1, 1, 0.0f, 1e10f, 0.0f },
- { GEN_ENDADDROFS, 1, 1, -1e10f, 0.0f, 0.0f },
- { GEN_STARTLOOPADDROFS, 1, 1, -1e10f, 1e10f, 0.0f },
- { GEN_ENDLOOPADDROFS, 1, 1, -1e10f, 1e10f, 0.0f },
- { GEN_STARTADDRCOARSEOFS, 0, 1, 0.0f, 1e10f, 0.0f },
- { GEN_MODLFOTOPITCH, 1, 2, -12000.0f, 12000.0f, 0.0f },
- { GEN_VIBLFOTOPITCH, 1, 2, -12000.0f, 12000.0f, 0.0f },
- { GEN_MODENVTOPITCH, 1, 2, -12000.0f, 12000.0f, 0.0f },
- { GEN_FILTERFC, 1, 2, 1500.0f, 13500.0f, 13500.0f },
- { GEN_FILTERQ, 1, 1, 0.0f, 960.0f, 0.0f },
- { GEN_MODLFOTOFILTERFC, 1, 2, -12000.0f, 12000.0f, 0.0f },
- { GEN_MODENVTOFILTERFC, 1, 2, -12000.0f, 12000.0f, 0.0f },
- { GEN_ENDADDRCOARSEOFS, 0, 1, -1e10f, 0.0f, 0.0f },
- { GEN_MODLFOTOVOL, 1, 1, -960.0f, 960.0f, 0.0f },
- { GEN_UNUSED1, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_CHORUSSEND, 1, 1, 0.0f, 1000.0f, 0.0f },
- { GEN_REVERBSEND, 1, 1, 0.0f, 1000.0f, 0.0f },
- { GEN_PAN, 1, 1, -500.0f, 500.0f, 0.0f },
- { GEN_UNUSED2, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_UNUSED3, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_UNUSED4, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_MODLFODELAY, 1, 2, -12000.0f, 5000.0f, -12000.0f },
- { GEN_MODLFOFREQ, 1, 4, -16000.0f, 4500.0f, 0.0f },
- { GEN_VIBLFODELAY, 1, 2, -12000.0f, 5000.0f, -12000.0f },
- { GEN_VIBLFOFREQ, 1, 4, -16000.0f, 4500.0f, 0.0f },
- { GEN_MODENVDELAY, 1, 2, -12000.0f, 5000.0f, -12000.0f },
- { GEN_MODENVATTACK, 1, 2, -12000.0f, 8000.0f, -12000.0f },
- { GEN_MODENVHOLD, 1, 2, -12000.0f, 5000.0f, -12000.0f },
- { GEN_MODENVDECAY, 1, 2, -12000.0f, 8000.0f, -12000.0f },
- { GEN_MODENVSUSTAIN, 0, 1, 0.0f, 1000.0f, 0.0f },
- { GEN_MODENVRELEASE, 1, 2, -12000.0f, 8000.0f, -12000.0f },
- { GEN_KEYTOMODENVHOLD, 0, 1, -1200.0f, 1200.0f, 0.0f },
- { GEN_KEYTOMODENVDECAY, 0, 1, -1200.0f, 1200.0f, 0.0f },
- { GEN_VOLENVDELAY, 1, 2, -12000.0f, 5000.0f, -12000.0f },
- { GEN_VOLENVATTACK, 1, 2, -12000.0f, 8000.0f, -12000.0f },
- { GEN_VOLENVHOLD, 1, 2, -12000.0f, 5000.0f, -12000.0f },
- { GEN_VOLENVDECAY, 1, 2, -12000.0f, 8000.0f, -12000.0f },
- { GEN_VOLENVSUSTAIN, 0, 1, 0.0f, 1440.0f, 0.0f },
- { GEN_VOLENVRELEASE, 1, 2, -12000.0f, 8000.0f, -12000.0f },
- { GEN_KEYTOVOLENVHOLD, 0, 1, -1200.0f, 1200.0f, 0.0f },
- { GEN_KEYTOVOLENVDECAY, 0, 1, -1200.0f, 1200.0f, 0.0f },
- { GEN_INSTRUMENT, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_RESERVED1, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_KEYRANGE, 0, 0, 0.0f, 127.0f, 0.0f },
- { GEN_VELRANGE, 0, 0, 0.0f, 127.0f, 0.0f },
- { GEN_STARTLOOPADDRCOARSEOFS, 0, 1, -1e10f, 1e10f, 0.0f },
- { GEN_KEYNUM, 1, 0, 0.0f, 127.0f, -1.0f },
- { GEN_VELOCITY, 1, 1, 0.0f, 127.0f, -1.0f },
- { GEN_ATTENUATION, 1, 1, 0.0f, 1440.0f, 0.0f },
- { GEN_RESERVED2, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_ENDLOOPADDRCOARSEOFS, 0, 1, -1e10f, 1e10f, 0.0f },
- { GEN_COARSETUNE, 0, 1, -120.0f, 120.0f, 0.0f },
- { GEN_FINETUNE, 0, 1, -99.0f, 99.0f, 0.0f },
- { GEN_SAMPLEID, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_SAMPLEMODE, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_RESERVED3, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_SCALETUNE, 0, 1, 0.0f, 1200.0f, 100.0f },
- { GEN_EXCLUSIVECLASS, 0, 0, 0.0f, 0.0f, 0.0f },
- { GEN_OVERRIDEROOTKEY, 1, 0, 0.0f, 127.0f, -1.0f },
- { GEN_PITCH, 1, 0, 0.0f, 127.0f, 0.0f }
- };
- /**
- * Set an array of generators to their default values.
- * @param gen Array of generators (should be #GEN_LAST in size).
- * @return Always returns 0
- */
- int
- fluid_gen_set_default_values(fluid_gen_t* gen)
- {
- int i;
- for (i = 0; i < GEN_LAST; i++) {
- gen[i].flags = GEN_UNUSED;
- gen[i].mod = 0.0;
- gen[i].nrpn = 0.0;
- gen[i].val = fluid_gen_info[i].def;
- }
- return FLUID_OK;
- }
- /* fluid_gen_init
- *
- * Set an array of generators to their initial value
- */
- int
- fluid_gen_init(fluid_gen_t* gen, fluid_channel_t* channel)
- {
- int i;
- fluid_gen_set_default_values(gen);
- for (i = 0; i < GEN_LAST; i++) {
- gen[i].nrpn = fluid_channel_get_gen(channel, i);
- /* This is an extension to the SoundFont standard. More
- * documentation is available at the fluid_synth_set_gen2()
- * function. */
- if (fluid_channel_get_gen_abs(channel, i)) {
- gen[i].flags = GEN_ABS_NRPN;
- }
- }
- return FLUID_OK;
- }
- fluid_real_t fluid_gen_scale(int gen, float value)
- {
- return (fluid_gen_info[gen].min
- + value * (fluid_gen_info[gen].max - fluid_gen_info[gen].min));
- }
- fluid_real_t fluid_gen_scale_nrpn(int gen, int data)
- {
- fluid_real_t value = (float) data - 8192.0f;
- fluid_clip(value, -8192, 8192);
- return value * (float) fluid_gen_info[gen].nrpn_scale;
- }
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