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livetrax/libs/fluidsynth/src/fluid_chan.c

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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
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#include "fluid_chan.h"
#include "fluid_mod.h"
#include "fluid_synth.h"
#include "fluid_sfont.h"
/* Field shift amounts for sfont_bank_prog bit field integer */
#define PROG_SHIFTVAL 0
#define BANK_SHIFTVAL 8
#define SFONT_SHIFTVAL 22
/* Field mask values for sfont_bank_prog bit field integer */
#define PROG_MASKVAL 0x000000FF /* Bit 7 is used to indicate unset state */
#define BANK_MASKVAL 0x003FFF00
#define BANKLSB_MASKVAL 0x00007F00
#define BANKMSB_MASKVAL 0x003F8000
#define SFONT_MASKVAL 0xFFC00000
static void fluid_channel_init(fluid_channel_t* chan);
fluid_channel_t*
new_fluid_channel(fluid_synth_t* synth, int num)
{
fluid_channel_t* chan;
chan = FLUID_NEW(fluid_channel_t);
if (chan == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return NULL;
}
chan->synth = synth;
chan->channum = num;
chan->preset = NULL;
chan->tuning = NULL;
fluid_channel_init(chan);
fluid_channel_init_ctrl(chan, 0);
return chan;
}
static void
fluid_channel_init(fluid_channel_t* chan)
{
fluid_preset_t *newpreset;
int prognum, banknum;
chan->sostenuto_orderid = 0;
chan->channel_type = (chan->channum == 9) ? CHANNEL_TYPE_DRUM : CHANNEL_TYPE_MELODIC;
prognum = 0;
banknum = (chan->channel_type == CHANNEL_TYPE_DRUM) ? DRUM_INST_BANK : 0;
chan->sfont_bank_prog = 0 << SFONT_SHIFTVAL | banknum << BANK_SHIFTVAL
| prognum << PROG_SHIFTVAL;
newpreset = fluid_synth_find_preset(chan->synth, banknum, prognum);
fluid_channel_set_preset(chan, newpreset);
chan->interp_method = FLUID_INTERP_DEFAULT;
chan->tuning_bank = 0;
chan->tuning_prog = 0;
chan->nrpn_select = 0;
chan->nrpn_active = 0;
if (chan->tuning)
{
fluid_tuning_unref (chan->tuning, 1);
chan->tuning = NULL;
}
}
/*
@param is_all_ctrl_off if nonzero, only resets some controllers, according to
http://www.midi.org/techspecs/rp15.php
*/
void
fluid_channel_init_ctrl(fluid_channel_t* chan, int is_all_ctrl_off)
{
int i;
chan->key_pressure = 0;
chan->channel_pressure = 0;
chan->pitch_bend = 0x2000; /* Range is 0x4000, pitch bend wheel starts in centered position */
for (i = 0; i < GEN_LAST; i++) {
chan->gen[i] = 0.0f;
chan->gen_abs[i] = 0;
}
if (is_all_ctrl_off) {
for (i = 0; i < ALL_SOUND_OFF; i++) {
if (i >= EFFECTS_DEPTH1 && i <= EFFECTS_DEPTH5) {
continue;
}
if (i >= SOUND_CTRL1 && i <= SOUND_CTRL10) {
continue;
}
if (i == BANK_SELECT_MSB || i == BANK_SELECT_LSB || i == VOLUME_MSB ||
i == VOLUME_LSB || i == PAN_MSB || i == PAN_LSB) {
continue;
}
fluid_channel_set_cc (chan, i, 0);
}
}
else {
for (i = 0; i < 128; i++) {
fluid_channel_set_cc (chan, i, 0);
}
}
/* Set RPN controllers to NULL state */
fluid_channel_set_cc (chan, RPN_LSB, 127);
fluid_channel_set_cc (chan, RPN_MSB, 127);
/* Set NRPN controllers to NULL state */
fluid_channel_set_cc (chan, NRPN_LSB, 127);
fluid_channel_set_cc (chan, NRPN_MSB, 127);
/* Expression (MSB & LSB) */
fluid_channel_set_cc (chan, EXPRESSION_MSB, 127);
fluid_channel_set_cc (chan, EXPRESSION_LSB, 127);
if (!is_all_ctrl_off) {
chan->pitch_wheel_sensitivity = 2; /* two semi-tones */
/* Just like panning, a value of 64 indicates no change for sound ctrls */
for (i = SOUND_CTRL1; i <= SOUND_CTRL10; i++) {
fluid_channel_set_cc (chan, i, 64);
}
/* Volume / initial attenuation (MSB & LSB) */
fluid_channel_set_cc (chan, VOLUME_MSB, 100);
fluid_channel_set_cc (chan, VOLUME_LSB, 0);
/* Pan (MSB & LSB) */
fluid_channel_set_cc (chan, PAN_MSB, 64);
fluid_channel_set_cc (chan, PAN_LSB, 0);
/* Reverb */
/* fluid_channel_set_cc (chan, EFFECTS_DEPTH1, 40); */
/* Note: although XG standard specifies the default amount of reverb to
be 40, most people preferred having it at zero.
See http://lists.gnu.org/archive/html/fluid-dev/2009-07/msg00016.html */
}
}
/* Only called by delete_fluid_synth(), so no need to queue a preset free event */
int
delete_fluid_channel(fluid_channel_t* chan)
{
if (chan->preset) delete_fluid_preset (chan->preset);
FLUID_FREE(chan);
return FLUID_OK;
}
/* FIXME - Calls fluid_channel_init() potentially in synthesis context */
void
fluid_channel_reset(fluid_channel_t* chan)
{
fluid_channel_init(chan);
fluid_channel_init_ctrl(chan, 0);
}
/* Should only be called from synthesis context */
int
fluid_channel_set_preset(fluid_channel_t* chan, fluid_preset_t* preset)
{
fluid_preset_notify (chan->preset, FLUID_PRESET_UNSELECTED, chan->channum);
if (chan->preset) {
fluid_sfont_t *sfont;
sfont = chan->preset->sfont;
delete_fluid_preset (chan->preset);
fluid_synth_sfont_unref (chan->synth, sfont); /* -- unref preset's SoundFont */
}
chan->preset = preset;
fluid_preset_notify (preset, FLUID_PRESET_SELECTED, chan->channum);
return FLUID_OK;
}
/* Set SoundFont ID, MIDI bank and/or program. Use -1 to use current value. */
void
fluid_channel_set_sfont_bank_prog(fluid_channel_t* chan, int sfontnum,
int banknum, int prognum)
{
int oldval, newval, oldmask;
newval = ((sfontnum != -1) ? sfontnum << SFONT_SHIFTVAL : 0)
| ((banknum != -1) ? banknum << BANK_SHIFTVAL : 0)
| ((prognum != -1) ? prognum << PROG_SHIFTVAL : 0);
oldmask = ((sfontnum != -1) ? 0 : SFONT_MASKVAL)
| ((banknum != -1) ? 0 : BANK_MASKVAL)
| ((prognum != -1) ? 0 : PROG_MASKVAL);
oldval = chan->sfont_bank_prog;
newval = (newval & ~oldmask) | (oldval & oldmask);
chan->sfont_bank_prog = newval;
}
/* Set bank LSB 7 bits */
void
fluid_channel_set_bank_lsb(fluid_channel_t* chan, int banklsb)
{
int oldval, newval, style;
style = chan->synth->bank_select;
if (style == FLUID_BANK_STYLE_GM ||
style == FLUID_BANK_STYLE_GS)
return; /* ignored */
oldval = chan->sfont_bank_prog;
if (style == FLUID_BANK_STYLE_XG)
newval = (oldval & ~BANK_MASKVAL) | (banklsb << BANK_SHIFTVAL);
else /* style == FLUID_BANK_STYLE_MMA */
newval = (oldval & ~BANKLSB_MASKVAL) | (banklsb << BANK_SHIFTVAL);
chan->sfont_bank_prog = newval;
}
/* Set bank MSB 7 bits */
void
fluid_channel_set_bank_msb(fluid_channel_t* chan, int bankmsb)
{
int oldval, newval, style;
style = chan->synth->bank_select;
if (style == FLUID_BANK_STYLE_XG)
{
/* XG bank, do drum-channel auto-switch */
/* The number "120" was based on several keyboards having drums at 120 - 127,
reference: http://lists.nongnu.org/archive/html/fluid-dev/2011-02/msg00003.html */
chan->channel_type = (120 <= bankmsb) ? CHANNEL_TYPE_DRUM : CHANNEL_TYPE_MELODIC;
return;
}
if (style == FLUID_BANK_STYLE_GM ||
chan->channel_type == CHANNEL_TYPE_DRUM)
return; /* ignored */
oldval = chan->sfont_bank_prog;
if (style == FLUID_BANK_STYLE_GS)
newval = (oldval & ~BANK_MASKVAL) | (bankmsb << BANK_SHIFTVAL);
else /* style == FLUID_BANK_STYLE_MMA */
newval = (oldval & ~BANKMSB_MASKVAL) | (bankmsb << (BANK_SHIFTVAL + 7));
chan->sfont_bank_prog = newval;
}
/* Get SoundFont ID, MIDI bank and/or program. Use NULL to ignore a value. */
void
fluid_channel_get_sfont_bank_prog(fluid_channel_t* chan, int *sfont,
int *bank, int *prog)
{
int sfont_bank_prog;
sfont_bank_prog = chan->sfont_bank_prog;
if (sfont) *sfont = (sfont_bank_prog & SFONT_MASKVAL) >> SFONT_SHIFTVAL;
if (bank) *bank = (sfont_bank_prog & BANK_MASKVAL) >> BANK_SHIFTVAL;
if (prog) *prog = (sfont_bank_prog & PROG_MASKVAL) >> PROG_SHIFTVAL;
}
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