livetrax/libs/fluidsynth/src/fluid_gen.c

/* 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 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */


#include "fluid_gen.h"
#include "fluid_chan.h"


/* See SFSpec21 $8.1.3 */
static const fluid_gen_info_t fluid_gen_info[] =
{
    /* number/name             init  nrpn-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 },
    { GEN_CUSTOM_BALANCE,         1,     0,    -960.0f,    960.0f,       0.0f },
    { GEN_CUSTOM_FILTERFC,        1,     2,       0.0f,  22050.0f,       0.0f },
    { GEN_CUSTOM_FILTERQ,         1,     1,       0.0f,    960.0f,       0.0f }
};

/* fluid_gen_init
 *
 * Set an array of generators to their initial value
 */
void
fluid_gen_init(fluid_gen_t *gen, fluid_channel_t *channel)
{
    int i;

    for(i = 0; i < GEN_LAST; i++)
    {
        gen[i].flags = GEN_UNUSED;
        gen[i].mod = 0.0;
        gen[i].nrpn = (channel == NULL) ? 0.0 : fluid_channel_get_gen(channel, i);
        gen[i].val = fluid_gen_info[i].def;
    }
}

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)
{
    data = data - 8192;
    fluid_clip(data, -8192, 8192);
    return (fluid_real_t)(data * fluid_gen_info[gen].nrpn_scale);
}