sampler_layer.c

   1 /*
   2 Calf Box, an open source musical instrument.
   3 Copyright (C) 2010-2011 Krzysztof Foltman
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include "config-api.h"
  20 #include "dspmath.h"
  21 #include "errors.h"
  22 #include "midi.h"
  23 #include "module.h"
  24 #include "rt.h"
  25 #include "sampler.h"
  26 #include "sfzloader.h"
  27 #include <assert.h>
  28 #include <errno.h>
  29 #include <glib.h>
  30 #include <math.h>
  31 #include <memory.h>
  32 #include <sndfile.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <locale.h>
  36 #include <xlocale.h>
  37
  38 static void sampler_layer_data_set_modulation(struct sampler_layer_data *l, enum sampler_modsrc src, enum sampler_modsrc src2, enum sampler_moddest dest, float amount, int flags, gboolean propagating_defaults)
  39 {
  40     GSList *p = l->modulations;
  41     while(p)
  42     {
  43         struct sampler_modulation *sm = p->data;
  44         if (sm->src == src && sm->src2 == src2 && sm->dest == dest)
  45         {
  46             // do not overwrite locally set value with defaults
  47             if (propagating_defaults && sm->has_value)
  48                 return;
  49             sm->amount = amount;
  50             sm->flags = flags;
  51             sm->has_value = !propagating_defaults;
  52             return;
  53         }
  54         p = g_slist_next(p);
  55     }
  56     struct sampler_modulation *sm = g_malloc0(sizeof(struct sampler_modulation));
  57     sm->src = src;
  58     sm->src2 = src2;
  59     sm->dest = dest;
  60     sm->amount = amount;
  61     sm->flags = flags;
  62     sm->has_value = !propagating_defaults;
  63     l->modulations = g_slist_prepend(l->modulations, sm);
  64 }
  65
  66 void sampler_layer_set_modulation1(struct sampler_layer *l, enum sampler_modsrc src, enum sampler_moddest dest, float amount, int flags)
  67 {
  68     sampler_layer_data_set_modulation(&l->data, src, smsrc_none, dest, amount, flags, FALSE);
  69 }
  70
  71 void sampler_layer_set_modulation(struct sampler_layer *l, enum sampler_modsrc src, enum sampler_modsrc src2, enum sampler_moddest dest, float amount, int flags)
  72 {
  73     sampler_layer_data_set_modulation(&l->data, src, src2, dest, amount, flags, FALSE);
  74 }
  75
  76 void sampler_layer_data_add_nif(struct sampler_layer_data *l, SamplerNoteInitFunc notefunc, int variant, float param, gboolean propagating_defaults)
  77 {
  78     GSList *p = l->nifs;
  79     while(p)
  80     {
  81         struct sampler_noteinitfunc *nif = p->data;
  82         if (nif->notefunc == notefunc && nif->variant == variant)
  83         {
  84             // do not overwrite locally set value with defaults
  85             if (propagating_defaults && nif->has_value)
  86                 return;
  87             nif->param = param;
  88             nif->has_value = !propagating_defaults;
  89             return;
  90         }
  91         p = g_slist_next(p);
  92     }
  93     struct sampler_noteinitfunc *nif = malloc(sizeof(struct sampler_noteinitfunc));
  94     nif->notefunc = notefunc;
  95     nif->variant = variant;
  96     nif->param = param;
  97     nif->has_value = !propagating_defaults;
  98     l->nifs = g_slist_prepend(l->nifs, nif);
  99 }
 100
 101 void sampler_layer_add_nif(struct sampler_layer *l, SamplerNoteInitFunc notefunc, int variant, float param)
 102 {
 103     sampler_layer_data_add_nif(&l->data, notefunc, variant, param, FALSE);
 104 }
 105
 106 static gboolean sampler_layer_process_cmd(struct cbox_command_target *ct, struct cbox_command_target *fb, struct cbox_osc_command *cmd, GError **error)
 107 {
 108     struct sampler_layer *layer = ct->user_data;
 109     if (!strcmp(cmd->command, "/status") && !strcmp(cmd->arg_types, ""))
 110     {
 111         if (!cbox_check_fb_channel(fb, cmd->command, error))
 112             return FALSE;
 113
 114         if (!((!layer->parent_program || cbox_execute_on(fb, NULL, "/parent_program", "o", error, layer->parent_program)) &&
 115             (!layer->parent_group || cbox_execute_on(fb, NULL, "/parent_group", "o", error, layer->parent_group)) &&
 116             CBOX_OBJECT_DEFAULT_STATUS(layer, fb, error)))
 117             return FALSE;
 118         return TRUE;
 119     }
 120     if ((!strcmp(cmd->command, "/as_string") || !strcmp(cmd->command, "/as_string_full")) && !strcmp(cmd->arg_types, ""))
 121     {
 122         if (!cbox_check_fb_channel(fb, cmd->command, error))
 123             return FALSE;
 124         gchar *res = sampler_layer_to_string(layer, !strcmp(cmd->command, "/as_string_full"));
 125         gboolean result = cbox_execute_on(fb, NULL, "/value", "s", error, res);
 126         g_free(res);
 127         return result;
 128     }
 129     if (!strcmp(cmd->command, "/set_param") && !strcmp(cmd->arg_types, "ss"))
 130     {
 131         const char *key = CBOX_ARG_S(cmd, 0);
 132         const char *value = CBOX_ARG_S(cmd, 1);
 133         if (sampler_layer_apply_param(layer, key, value, error))
 134         {
 135             sampler_layer_update(layer);
 136             sampler_program_update_layers(layer->parent_program);
 137             return TRUE;
 138         }
 139         return FALSE;
 140     }
 141     if (!strcmp(cmd->command, "/new_region") && !strcmp(cmd->arg_types, ""))
 142     {
 143         // XXXKF needs a string argument perhaps
 144         if (layer->parent_group)
 145         {
 146             g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "Cannot create a region within a region");
 147             return FALSE;
 148         }
 149         struct sampler_layer *l = sampler_layer_new(layer->module, layer->parent_program, layer);
 150         sampler_layer_data_finalize(&l->data, l->parent_group ? &l->parent_group->data : NULL, layer->parent_program);
 151         sampler_layer_reset_switches(l, l->module);
 152         sampler_layer_update(l);
 153
 154         sampler_program_add_layer(layer->parent_program, l);
 155         sampler_program_update_layers(layer->parent_program);
 156
 157         return cbox_execute_on(fb, NULL, "/uuid", "o", error, l);
 158     }
 159     if (!strcmp(cmd->command, "/get_children") && !strcmp(cmd->arg_types, ""))
 160     {
 161         if (!cbox_check_fb_channel(fb, cmd->command, error))
 162             return FALSE;
 163         GHashTableIter iter;
 164         g_hash_table_iter_init(&iter, layer->child_layers);
 165         gpointer key, value;
 166         while(g_hash_table_iter_next(&iter, &key, &value))
 167         {
 168             if (!cbox_execute_on(fb, NULL, "/region", "o", error, key))
 169                 return FALSE;
 170         }
 171         return TRUE;
 172     }
 173     // otherwise, treat just like an command on normal (non-aux) output
 174     return cbox_object_default_process_cmd(ct, fb, cmd, error);
 175
 176 }
 177
 178
 179 #define PROC_FIELDS_INITIALISER(type, name, def_value) \
 180     ld->name = def_value; \
 181     ld->has_##name = 0;
 182 #define PROC_FIELDS_INITIALISER_string(name) \
 183     ld->name = NULL; \
 184     ld->name##_changed = FALSE; \
 185     ld->has_##name = 0;
 186 #define PROC_FIELDS_INITIALISER_enum(type, name, def_value) \
 187     PROC_FIELDS_INITIALISER(type, name, def_value)
 188 #define PROC_FIELDS_INITIALISER_dBamp(type, name, def_value) \
 189     ld->name = def_value; \
 190     ld->name##_linearized = -1; \
 191     ld->has_##name = 0;
 192 #define PROC_FIELDS_INITIALISER_dahdsr(name, parname, index) \
 193     DAHDSR_FIELDS(PROC_SUBSTRUCT_RESET_FIELD, name, ld); \
 194     DAHDSR_FIELDS(PROC_SUBSTRUCT_RESET_HAS_FIELD, name, ld)
 195 #define PROC_FIELDS_INITIALISER_lfo(name, parname, index) \
 196     LFO_FIELDS(PROC_SUBSTRUCT_RESET_FIELD, name, ld); \
 197     LFO_FIELDS(PROC_SUBSTRUCT_RESET_HAS_FIELD, name, ld)
 198 #define PROC_FIELDS_INITIALISER_ccrange(name) \
 199     ld->name##locc = 0; \
 200     ld->name##hicc = 127; \
 201     ld->name##cc_number = 0; \
 202     ld->has_##name##locc = 0; \
 203     ld->has_##name##hicc = 0;
 204
 205 CBOX_CLASS_DEFINITION_ROOT(sampler_layer)
 206
 207 struct sampler_layer *sampler_layer_new(struct sampler_module *m, struct sampler_program *parent_program, struct sampler_layer *parent_group)
 208 {
 209     struct sampler_layer *l = calloc(1, sizeof(struct sampler_layer));
 210     struct cbox_document *doc = CBOX_GET_DOCUMENT(parent_program);
 211     memset(l, 0, sizeof(struct sampler_layer));
 212     CBOX_OBJECT_HEADER_INIT(l, sampler_layer, doc);
 213     cbox_command_target_init(&l->cmd_target, sampler_layer_process_cmd, l);
 214
 215     l->module = m;
 216     l->child_layers = g_hash_table_new(NULL, NULL);
 217     if (parent_group)
 218     {
 219         sampler_layer_data_clone(&l->data, &parent_group->data, FALSE);
 220         l->parent_program = parent_program;
 221         l->parent_group = parent_group;
 222         g_hash_table_add(parent_group->child_layers, l);
 223         l->runtime = NULL;
 224         CBOX_OBJECT_REGISTER(l);
 225         return l;
 226     }
 227     l->parent_program = parent_program;
 228
 229     struct sampler_layer_data *ld = &l->data;
 230     SAMPLER_FIXED_FIELDS(PROC_FIELDS_INITIALISER)
 231
 232     ld->eff_waveform = NULL;
 233     ld->eff_freq = 44100;
 234     ld->velcurve[0] = 0;
 235     ld->velcurve[127] = 1;
 236     for (int i = 1; i < 127; i++)
 237         ld->velcurve[i] = -1;
 238     ld->modulations = NULL;
 239     ld->nifs = NULL;
 240     ld->on_locc = 0;
 241     ld->on_hicc = 127;
 242     ld->on_cc_number = -1;
 243
 244     ld->eff_use_keyswitch = 0;
 245     l->last_key = -1;
 246     if (!parent_group)
 247     {
 248         sampler_layer_set_modulation1(l, 74, smdest_cutoff, 9600, 2);
 249         sampler_layer_set_modulation1(l, 71, smdest_resonance, 12, 2);
 250         sampler_layer_set_modulation(l, smsrc_pitchlfo, 1, smdest_pitch, 100, 0);
 251     }
 252     l->runtime = NULL;
 253     l->unknown_keys = NULL;
 254     CBOX_OBJECT_REGISTER(l);
 255     return l;
 256 }
 257
 258 #define PROC_FIELDS_CLONE(type, name, def_value) \
 259     dst->name = src->name; \
 260     dst->has_##name = copy_hasattr ? src->has_##name : FALSE;
 261 #define PROC_FIELDS_CLONE_string(name) \
 262     dst->name = src->name ? g_strdup(src->name) : NULL; \
 263     dst->name##_changed = src->name##_changed; \
 264     dst->has_##name = copy_hasattr ? src->has_##name : FALSE;
 265 #define PROC_FIELDS_CLONE_dBamp PROC_FIELDS_CLONE
 266 #define PROC_FIELDS_CLONE_enum PROC_FIELDS_CLONE
 267 #define PROC_FIELDS_CLONE_dahdsr(name, parname, index) \
 268         DAHDSR_FIELDS(PROC_SUBSTRUCT_CLONE, name, dst, src) \
 269         if (!copy_hasattr) \
 270             DAHDSR_FIELDS(PROC_SUBSTRUCT_RESET_HAS_FIELD, name, dst)
 271 #define PROC_FIELDS_CLONE_lfo(name, parname, index) \
 272         LFO_FIELDS(PROC_SUBSTRUCT_CLONE, name, dst, src) \
 273         if (!copy_hasattr) \
 274             LFO_FIELDS(PROC_SUBSTRUCT_RESET_HAS_FIELD, name, dst)
 275 #define PROC_FIELDS_CLONE_ccrange(name) \
 276     dst->name##locc = src->name##locc; \
 277     dst->name##hicc = src->name##hicc; \
 278     dst->name##cc_number = src->name##cc_number; \
 279     dst->has_##name##locc = copy_hasattr ? src->has_##name##locc : FALSE; \
 280     dst->has_##name##hicc = copy_hasattr ? src->has_##name##hicc : FALSE;
 281
 282 void sampler_layer_data_clone(struct sampler_layer_data *dst, const struct sampler_layer_data *src, gboolean copy_hasattr)
 283 {
 284     SAMPLER_FIXED_FIELDS(PROC_FIELDS_CLONE)
 285     memcpy(dst->velcurve, src->velcurve, 128 * sizeof(float));
 286     dst->modulations = g_slist_copy(src->modulations);
 287     for(GSList *mod = dst->modulations; mod; mod = mod->next)
 288     {
 289         struct sampler_modulation *srcm = mod->data;
 290         struct sampler_modulation *dstm = g_malloc(sizeof(struct sampler_modulation));
 291         memcpy(dstm, srcm, sizeof(struct sampler_modulation));
 292         dstm->has_value = copy_hasattr ? srcm->has_value : FALSE;
 293         mod->data = dstm;
 294     }
 295     dst->nifs = g_slist_copy(src->nifs);
 296     for(GSList *nif = dst->nifs; nif; nif = nif->next)
 297     {
 298         struct sampler_noteinitfunc *dstn = g_malloc(sizeof(struct sampler_noteinitfunc));
 299         struct sampler_noteinitfunc *srcn = nif->data;
 300         memcpy(dstn, srcn, sizeof(struct sampler_noteinitfunc));
 301         dstn->has_value = copy_hasattr ? srcn->has_value : FALSE;
 302         nif->data = dstn;
 303     }
 304     dst->eff_waveform = src->eff_waveform;
 305     if (dst->eff_waveform)
 306         cbox_waveform_ref(dst->eff_waveform);
 307 }
 308
 309 #define PROC_FIELDS_CLONEPARENT(type, name, def_value) \
 310     if (!l->has_##name) \
 311         l->name = parent ? parent->name : def_value;
 312 #define PROC_FIELDS_CLONEPARENT_string(name) \
 313     if (!l->has_##name && (!l->name || !parent->name || strcmp(l->name, parent->name))) { \
 314         g_free(l->name); \
 315         l->name = parent && parent->name ? g_strdup(parent->name) : NULL; \
 316         l->name##_changed = parent && parent->name##_changed; \
 317     }
 318 #define PROC_FIELDS_CLONEPARENT_dBamp PROC_FIELDS_CLONEPARENT
 319 #define PROC_FIELDS_CLONEPARENT_enum PROC_FIELDS_CLONEPARENT
 320 #define PROC_FIELDS_CLONEPARENT_dahdsr(name, parname, index) \
 321         DAHDSR_FIELDS(PROC_SUBSTRUCT_CLONEPARENT, name, l)
 322 #define PROC_FIELDS_CLONEPARENT_lfo(name, parname, index) \
 323         LFO_FIELDS(PROC_SUBSTRUCT_CLONEPARENT, name, l)
 324 #define PROC_FIELDS_CLONEPARENT_ccrange(name) \
 325     if (!l->has_##name##locc) \
 326         l->name##locc = parent ? parent->name##locc : 0; \
 327     if (!l->has_##name##hicc) \
 328         l->name##hicc = parent ? parent->name##hicc : 127; \
 329     if (!l->has_##name##locc && !l->has_##name##hicc) \
 330         l->name##cc_number = parent ? parent->name##cc_number : -1;
 331
 332 static void sampler_layer_data_getdefaults(struct sampler_layer_data *l, struct sampler_layer_data *parent)
 333 {
 334     SAMPLER_FIXED_FIELDS(PROC_FIELDS_CLONEPARENT)
 335     // XXXKF: add handling for velcurve
 336     if (parent)
 337     {
 338         // set NIFs used by parent
 339         for(GSList *mod = parent->nifs; mod; mod = mod->next)
 340         {
 341             struct sampler_noteinitfunc *nif = mod->data;
 342             sampler_layer_data_add_nif(l, nif->notefunc, nif->variant, nif->param, TRUE);
 343         }
 344         // set modulations used by parent
 345         for(GSList *mod = parent->modulations; mod; mod = mod->next)
 346         {
 347             struct sampler_modulation *srcm = mod->data;
 348             sampler_layer_data_set_modulation(l, srcm->src, srcm->src2, srcm->dest, srcm->amount, srcm->flags, TRUE);
 349         }
 350     }
 351 }
 352
 353 #define PROC_FIELDS_FINALISER(type, name, def_value)
 354 #define PROC_FIELDS_FINALISER_string(name)
 355 #define PROC_FIELDS_FINALISER_enum(type, name, def_value)
 356 #define PROC_FIELDS_FINALISER_dBamp(type, name, def_value) \
 357     l->name##_linearized = dB2gain(l->name);
 358 #define PROC_FIELDS_FINALISER_dahdsr(name, parname, index) \
 359     cbox_envelope_init_dahdsr(&l->name##_shape, &l->name, m->module.srate / CBOX_BLOCK_SIZE, 100.f, &l->name##_shape == &l->amp_env_shape);
 360 #define PROC_FIELDS_FINALISER_lfo(name, parname, index) /* no finaliser required */
 361 #define PROC_FIELDS_FINALISER_ccrange(name) /* no finaliser required */
 362
 363 void sampler_layer_data_finalize(struct sampler_layer_data *l, struct sampler_layer_data *parent, struct sampler_program *p)
 364 {
 365     struct sampler_module *m = p->module;
 366     SAMPLER_FIXED_FIELDS(PROC_FIELDS_FINALISER)
 367
 368     sampler_layer_data_getdefaults(l, parent);
 369
 370     // Handle change of sample in the prent group without override on region level
 371     if (parent && (l->sample_changed || parent->sample_changed))
 372     {
 373         struct cbox_waveform *oldwf = l->eff_waveform;
 374         if (l->sample && *l->sample)
 375         {
 376             GError *error = NULL;
 377             l->eff_waveform = cbox_wavebank_get_waveform(p->name, p->sample_dir, l->sample, &error);
 378             if (!l->eff_waveform)
 379             {
 380                 g_warning("Cannot load waveform %s: %s", l->sample, error ? error->message : "unknown error");
 381                 g_error_free(error);
 382             }
 383         }
 384         else
 385             l->eff_waveform = NULL;
 386         if (oldwf)
 387             cbox_waveform_unref(oldwf);
 388         l->sample_changed = FALSE;
 389     }
 390
 391     l->eff_freq = (l->eff_waveform && l->eff_waveform->info.samplerate) ? l->eff_waveform->info.samplerate : 44100;
 392     // XXXKF should have a distinction between 'configured' and 'effective' loop start/end
 393     if (l->loop_mode == slm_unknown)
 394     {
 395         if (l->eff_waveform && l->eff_waveform->has_loop)
 396             l->loop_mode = slm_loop_continuous;
 397         else
 398             l->loop_mode = l->loop_end == 0 ? slm_no_loop : slm_loop_continuous;
 399     }
 400
 401     if (l->loop_mode == slm_one_shot || l->loop_mode == slm_no_loop || l->loop_mode == slm_one_shot_chokeable)
 402         l->loop_start = -1;
 403
 404     if ((l->loop_mode == slm_loop_continuous || l->loop_mode == slm_loop_sustain) && l->loop_start == -1)
 405         l->loop_start = 0;
 406     if ((l->loop_mode == slm_loop_continuous || l->loop_mode == slm_loop_sustain) && l->loop_start == 0 && l->eff_waveform && l->eff_waveform->has_loop)
 407         l->loop_start = l->eff_waveform->loop_start;
 408     if (l->loop_end == 0 && l->eff_waveform != NULL && l->eff_waveform->has_loop)
 409         l->loop_end = l->eff_waveform->loop_end;
 410
 411     if (l->off_mode == som_unknown)
 412         l->off_mode = l->off_by != 0 ? som_fast : som_normal;
 413
 414     // if no amp_velcurve_nnn setting, default to quadratic
 415     if (l->velcurve_quadratic == -1)
 416         l->velcurve_quadratic = 1;
 417
 418     if (l->key >= 0 && l->key <= 127)
 419         l->lokey = l->hikey = l->pitch_keycenter = l->key;
 420
 421     // interpolate missing points in velcurve
 422     int start = 0;
 423     for (int i = 1; i < 128; i++)
 424     {
 425         if (l->velcurve[i] == -1)
 426             continue;
 427         float sv = l->velcurve[start];
 428         float ev = l->velcurve[i];
 429         if (l->velcurve_quadratic)
 430         {
 431             for (int j = start; j <= i; j++)
 432                 l->eff_velcurve[j] = sv + (ev - sv) * (j - start) * (j - start) / ((i - start) * (i - start));
 433         }
 434         else
 435         {
 436             for (int j = start; j <= i; j++)
 437                 l->eff_velcurve[j] = sv + (ev - sv) * (j - start) / (i - start);
 438         }
 439         start = i;
 440     }
 441     l->eff_use_keyswitch = ((l->sw_down != -1) || (l->sw_up != -1) || (l->sw_last != -1) || (l->sw_previous != -1));
 442
 443     // 'linearize' the virtual circular buffer - write 3 (or N) frames before end of the loop
 444     // and 3 (N) frames at the start of the loop, and play it; in rare cases this will need to be
 445     // repeated twice if output write pointer is close to CBOX_BLOCK_SIZE or playback rate is very low,
 446     // but that's OK.
 447     if (l->eff_waveform && l->eff_waveform->preloaded_frames == l->eff_waveform->info.frames)
 448     {
 449         int shift = l->eff_waveform->info.channels == 2 ? 1 : 0;
 450         uint32_t halfscratch = MAX_INTERPOLATION_ORDER << shift;
 451         memcpy(&l->scratch_loop[0], &l->eff_waveform->data[(l->loop_end - MAX_INTERPOLATION_ORDER) << shift], halfscratch * sizeof(int16_t) );
 452         memcpy(&l->scratch_end[0], &l->eff_waveform->data[(l->loop_end - MAX_INTERPOLATION_ORDER) << shift], halfscratch * sizeof(int16_t) );
 453         memset(l->scratch_end + halfscratch, 0, halfscratch * sizeof(int16_t));
 454         if (l->loop_start != (uint32_t)-1)
 455             memcpy(l->scratch_loop + halfscratch, &l->eff_waveform->data[l->loop_start << shift], halfscratch * sizeof(int16_t));
 456         else
 457             memset(l->scratch_loop + halfscratch, 0, halfscratch * sizeof(int16_t));
 458     }
 459 }
 460
 461 void sampler_layer_reset_switches(struct sampler_layer *l, struct sampler_module *m)
 462 {
 463     l->last_key = l->data.sw_lokey;
 464     l->current_seq_position = l->data.seq_position;
 465 }
 466
 467 struct layer_foreach_struct
 468 {
 469     struct sampler_layer *layer;
 470     const char *cfg_section;
 471 };
 472
 473 static void layer_foreach_func(void *user_data, const char *key)
 474 {
 475     if (!strcmp(key, "file"))
 476         key = "sample";
 477     // import is handled in sampler_load_layer_overrides
 478     if (!strcmp(key, "import"))
 479         return;
 480     struct layer_foreach_struct *lfs = user_data;
 481     const char *value = cbox_config_get_string(lfs->cfg_section, key);
 482     GError *error = NULL;
 483     if (!sampler_layer_apply_param(lfs->layer, key, value, &error))
 484     {
 485         if (error)
 486             g_warning("Error '%s', context: %s in section %s", error->message, key, lfs->cfg_section);
 487         else
 488             g_warning("Unknown sample layer parameter: %s in section %s", key, lfs->cfg_section);
 489     }
 490 }
 491
 492 void sampler_layer_load_overrides(struct sampler_layer *l, const char *cfg_section)
 493 {
 494     char *imp = cbox_config_get_string(cfg_section, "import");
 495     if (imp)
 496         sampler_layer_load_overrides(l, imp);
 497
 498     struct layer_foreach_struct lfs = {
 499         .layer = l,
 500         .cfg_section = cfg_section
 501     };
 502     cbox_config_foreach_key(layer_foreach_func, cfg_section, &lfs);
 503 }
 504
 505 struct sampler_layer *sampler_layer_new_from_section(struct sampler_module *m, struct sampler_program *parent_program, const char *cfg_section)
 506 {
 507     struct sampler_layer *l = sampler_layer_new(m, parent_program, NULL);
 508     sampler_layer_load_overrides(l, cfg_section);
 509     sampler_layer_data_finalize(&l->data, l->parent_group ? &l->parent_group->data : NULL, parent_program);
 510     sampler_layer_reset_switches(l, m);
 511     return l;
 512 }
 513
 514 static int sfz_note_from_string(const char *note)
 515 {
 516     static const int semis[] = {9, 11, 0, 2, 4, 5, 7};
 517     int pos;
 518     int nn = tolower(note[0]);
 519     int nv;
 520     if (nn >= '0' && nn <= '9')
 521         return atoi(note);
 522     if (nn < 'a' && nn > 'g')
 523         return -1;
 524     nv = semis[nn - 'a'];
 525
 526     for (pos = 1; tolower(note[pos]) == 'b' || note[pos] == '#'; pos++)
 527         nv += (note[pos] != '#') ? -1 : +1;
 528
 529     if ((note[pos] == '-' && note[pos + 1] == '1' && note[pos + 2] == '\0') || (note[pos] >= '0' && note[pos] <= '9' && note[pos + 1] == '\0'))
 530     {
 531         return nv + 12 * (1 + atoi(note + pos));
 532     }
 533
 534     return -1;
 535 }
 536
 537 static double atof_C(const char *value)
 538 {
 539     return g_ascii_strtod(value, NULL);
 540 }
 541
 542 static gboolean parse_envelope_param(struct sampler_layer *layer, struct cbox_dahdsr *env, struct sampler_dahdsr_has_fields *has_fields, int env_type, const char *key, const char *value)
 543 {
 544     static const enum sampler_modsrc srcs[] = { smsrc_ampenv, smsrc_filenv, smsrc_pitchenv };
 545     static const enum sampler_moddest dests[] = { smdest_gain, smdest_cutoff, smdest_pitch };
 546     enum sampler_modsrc src = srcs[env_type];
 547     enum sampler_moddest dest = dests[env_type];
 548     float fvalue = atof_C(value);
 549
 550 #define PROC_SET_ENV_FIELD(name, index, def_value) \
 551         if (!strcmp(key, #name)) {\
 552             env->name = fvalue; \
 553             has_fields->name = 1; \
 554             return TRUE; \
 555         }
 556     DAHDSR_FIELDS(PROC_SET_ENV_FIELD)
 557     if (!strcmp(key, "depth"))
 558         sampler_layer_set_modulation1(layer, src, dest, atof_C(value), 0);
 559     else if (!strcmp(key, "vel2delay"))
 560         sampler_layer_add_nif(layer, sampler_nif_vel2env, (env_type << 4) + 0, fvalue);
 561     else if (!strcmp(key, "vel2attack"))
 562         sampler_layer_add_nif(layer, sampler_nif_vel2env, (env_type << 4) + 1, fvalue);
 563     else if (!strcmp(key, "vel2hold"))
 564         sampler_layer_add_nif(layer, sampler_nif_vel2env, (env_type << 4) + 2, fvalue);
 565     else if (!strcmp(key, "vel2decay"))
 566         sampler_layer_add_nif(layer, sampler_nif_vel2env, (env_type << 4) + 3, fvalue);
 567     else if (!strcmp(key, "vel2sustain"))
 568         sampler_layer_add_nif(layer, sampler_nif_vel2env, (env_type << 4) + 4, fvalue);
 569     else if (!strcmp(key, "vel2release"))
 570         sampler_layer_add_nif(layer, sampler_nif_vel2env, (env_type << 4) + 5, fvalue);
 571     else if (!strcmp(key, "vel2depth"))
 572         sampler_layer_set_modulation(layer, src, smsrc_vel, dest, atof_C(value), 0);
 573     else if (!strncmp(key, "depthcc", 7))
 574     {
 575         int cc = atoi(key + 7);
 576         if (cc > 0 && cc < 120)
 577             sampler_layer_set_modulation(layer, src, cc, dest, fvalue, 0);
 578         else
 579             return FALSE;
 580     }
 581     else
 582         return FALSE;
 583     return TRUE;
 584 }
 585
 586 static gboolean parse_lfo_param(struct sampler_layer *layer, struct sampler_lfo_params *params, struct sampler_lfo_has_fields *has_fields, int lfo_type, const char *key, const char *value)
 587 {
 588     static const enum sampler_modsrc srcs[] = { smsrc_amplfo, smsrc_fillfo, smsrc_pitchlfo };
 589     static const enum sampler_moddest dests[] = { smdest_gain, smdest_cutoff, smdest_pitch };
 590     enum sampler_modsrc src = srcs[lfo_type];
 591     enum sampler_moddest dest = dests[lfo_type];
 592
 593 #define PROC_SET_LFO_FIELD(name, index, def_value) \
 594         if (!strcmp(key, #name)) {\
 595             params->name = fvalue; \
 596             has_fields->name = 1; \
 597             return TRUE; \
 598         }
 599     float fvalue = atof_C(value);
 600     LFO_FIELDS(PROC_SET_LFO_FIELD)
 601     if (!strcmp(key, "depth"))
 602         sampler_layer_set_modulation1(layer, src, dest, fvalue, 0);
 603     else if (!strcmp(key, "depthchanaft"))
 604         sampler_layer_set_modulation(layer, src, smsrc_chanaft, dest, fvalue, 0);
 605     else if (!strcmp(key, "depthpolyaft"))
 606         sampler_layer_set_modulation(layer, src, smsrc_polyaft, dest, fvalue, 0);
 607     else if (!strncmp(key, "depthcc", 7))
 608     {
 609         int cc = atoi(key + 7);
 610         if (cc > 0 && cc < 120)
 611             sampler_layer_set_modulation(layer, src, cc, dest, fvalue, 0);
 612         else
 613             return FALSE;
 614     }
 615     else
 616         return FALSE;
 617     return TRUE;
 618 }
 619
 620 #define PARSE_PARAM_midi_note_t(field, strname, valuestr) \
 621     return ((l->data.field = sfz_note_from_string(value)), (l->data.has_##field = 1));
 622 #define PARSE_PARAM_int(field, strname, valuestr) \
 623     return ((l->data.field = atoi(value)), (l->data.has_##field = 1));
 624 #define PARSE_PARAM_uint32_t(field, strname, valuestr) \
 625     return ((l->data.field = (uint32_t)strtoul(value, NULL, 10)), (l->data.has_##field = 1));
 626 #define PARSE_PARAM_float(field, strname, valuestr) \
 627     return ((l->data.field = atof_C(value)), (l->data.has_##field = 1));
 628
 629 #define PROC_APPLY_PARAM(type, name, def_value) \
 630     if (!strcmp(key, #name)) { \
 631         PARSE_PARAM_##type(name, #name, value) \
 632     }
 633 #define PROC_APPLY_PARAM_string(name) \
 634     if (!strcmp(key, #name)) { \
 635         if (l->data.name && value && !strcmp(l->data.name, value)) \
 636             return (l->data.has_##name = 1); \
 637         g_free(l->data.name); \
 638         return ((l->data.name = g_strdup(value)), (l->data.name##_changed = 1), (l->data.has_##name = 1)); \
 639     }
 640 #define PROC_APPLY_PARAM_dBamp(type, name, def_value) \
 641     if (!strcmp(key, #name)) { \
 642         return ((l->data.name = atof_C(value)), (l->data.has_##name = 1)); \
 643     }
 644 #define PROC_APPLY_PARAM_enum(enumtype, name, def_value) \
 645     if (!strcmp(key, #name)) { \
 646         if (!enumtype##_from_string(value, &l->data.name)) { \
 647             g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "Value %s is not a correct value for %s", value, #name); \
 648             return FALSE; \
 649         } \
 650         l->data.has_##name = 1; \
 651         return TRUE; \
 652     }
 653 // LFO and envelope need special handling now
 654 #define PROC_APPLY_PARAM_dahdsr(name, parname, index) \
 655     if (!strncmp(key, #parname "_", sizeof(#parname))) \
 656         return parse_envelope_param(l, &l->data.name, &l->data.has_##name, index, key + sizeof(#parname), value);
 657 #define PROC_APPLY_PARAM_lfo(name, parname, index) \
 658     if (!strncmp(key, #parname "_", sizeof(#parname))) \
 659         return parse_lfo_param(l, &l->data.name, &l->data.has_##name, index, key + sizeof(#parname), value);
 660 #define PROC_APPLY_PARAM_ccrange(name)  /* handled separately in apply_param */
 661
 662 static void sampler_layer_apply_unknown(struct sampler_layer *l, const char *key, const char *value)
 663 {
 664     if (!l->unknown_keys)
 665         l->unknown_keys = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
 666
 667     g_hash_table_insert(l->unknown_keys, g_strdup(key), g_strdup(value));
 668 }
 669
 670 gboolean sampler_layer_apply_param(struct sampler_layer *l, const char *key, const char *value, GError **error)
 671 {
 672 try_now:
 673     // XXXKF: this is seriously stupid code, this should use a hash table for
 674     // fixed strings, or something else that doesn't explode O(N**2) with
 675     // number of attributes. But premature optimization is a root of all evil.
 676
 677     SAMPLER_FIXED_FIELDS(PROC_APPLY_PARAM)
 678
 679     // XXXKF: to make things worse, some attributes have names different from
 680     // C field names, or have multiple names, or don't map 1:1 to internal model
 681
 682     if (!strcmp(key, "lolev"))
 683         l->data.lovel = atoi(value), l->data.has_lovel = 1;
 684     else if (!strcmp(key, "hilev"))
 685         l->data.hivel = atoi(value), l->data.has_hivel = 1;
 686     else if (!strcmp(key, "benddown"))
 687         l->data.bend_down = atoi(value), l->data.has_bend_down = 1;
 688     else if (!strcmp(key, "bendup"))
 689         l->data.bend_up = atoi(value), l->data.has_bend_up = 1;
 690     else if (!strcmp(key, "loopstart"))
 691         l->data.loop_start = atoi(value), l->data.has_loop_start = 1;
 692     else if (!strcmp(key, "loopend"))
 693         l->data.loop_end = atoi(value), l->data.has_loop_end = 1;
 694     else if (!strcmp(key, "cutoff_chanaft"))
 695         sampler_layer_set_modulation1(l, smsrc_chanaft, smdest_cutoff, atof_C(value), 0);
 696     else if (!strcmp(key, "amp_random"))
 697         sampler_layer_add_nif(l, sampler_nif_addrandom, 0, atof_C(value));
 698     else if (!strcmp(key, "fil_random"))
 699         sampler_layer_add_nif(l, sampler_nif_addrandom, 1, atof_C(value));
 700     else if (!strcmp(key, "pitch_random"))
 701         sampler_layer_add_nif(l, sampler_nif_addrandom, 2, atof_C(value));
 702     else if (!strcmp(key, "pitch_veltrack"))
 703         sampler_layer_add_nif(l, sampler_nif_vel2pitch, 0, atof_C(value));
 704     else if (!strncmp(key, "delay_cc", 8))
 705     {
 706         int ccno = atoi(key + 8);
 707         if (ccno > 0 && ccno < 120)
 708             sampler_layer_add_nif(l, sampler_nif_cc2delay, ccno, atof_C(value));
 709         else
 710             goto unknown_key;
 711     }
 712     else if (!strncmp(key, "cutoff_cc", 9))
 713     {
 714         int ccno = atoi(key + 9);
 715         if (ccno > 0 && ccno < 120)
 716             sampler_layer_set_modulation1(l, ccno, smdest_cutoff, atof_C(value), 0);
 717         else
 718             goto unknown_key;
 719     }
 720     else if (!strncmp(key, "gain_cc", 7))
 721     {
 722         int ccno = atoi(key + 7);
 723         if (ccno > 0 && ccno < 120)
 724             sampler_layer_set_modulation1(l, ccno, smdest_gain, atof_C(value), 0);
 725         else
 726             goto unknown_key;
 727     }
 728     else if (!strncmp(key, "amp_velcurve_", 13))
 729     {
 730         // if not known yet, set to 0, it can always be overriden via velcurve_quadratic setting
 731         if (l->data.velcurve_quadratic == -1)
 732             l->data.velcurve_quadratic = 0;
 733         int point = atoi(key + 13);
 734         if (point >= 0 && point <= 127)
 735         {
 736             l->data.velcurve[point] = atof_C(value);
 737             if (l->data.velcurve[point] < 0)
 738                 l->data.velcurve[point] = 0;
 739             if (l->data.velcurve[point] > 1)
 740                 l->data.velcurve[point] = 1;
 741         }
 742         else
 743             goto unknown_key;
 744     }
 745     else if (!strncmp(key, "on_locc", 7) || !strncmp(key, "on_hicc", 7))
 746     {
 747         int cc = atoi(key + 7);
 748         if (cc > 0 && cc < 120)
 749         {
 750             if (*value)
 751             {
 752                 l->data.on_cc_number = cc;
 753                 if (key[3] == 'l')
 754                 {
 755                     l->data.on_locc = atoi(value);
 756                     l->data.has_on_locc = TRUE;
 757                 }
 758                 else
 759                 {
 760                     l->data.on_hicc = atoi(value);
 761                     l->data.has_on_hicc = TRUE;
 762                 }
 763             }
 764             else
 765             {
 766                 l->data.on_cc_number = -1;
 767                 l->data.has_on_locc = FALSE;
 768                 l->data.has_on_hicc = FALSE;
 769             }
 770         }
 771         else
 772             return FALSE;
 773     }
 774     else if (!strncmp(key, "locc", 4) || !strncmp(key, "hicc", 4))
 775     {
 776         int cc = atoi(key + 4);
 777         if (cc > 0 && cc < 120)
 778         {
 779             if (*value)
 780             {
 781                 l->data.cc_number = cc;
 782                 if (key[0] == 'l')
 783                 {
 784                     l->data.locc = atoi(value);
 785                     l->data.has_locc = TRUE;
 786                 }
 787                 else
 788                 {
 789                     l->data.hicc = atoi(value);
 790                     l->data.has_hicc = TRUE;
 791                 }
 792             }
 793             else
 794             {
 795                 l->data.cc_number = -1;
 796                 l->data.has_locc = FALSE;
 797                 l->data.has_hicc = FALSE;
 798             }
 799         }
 800         else
 801             return FALSE;
 802     }
 803     else if (!strcmp(key, "loopmode"))
 804     {
 805         key = "loop_mode";
 806         goto try_now; // yes, goto, why not?
 807     }
 808     else if (!strcmp(key, "offby"))
 809     {
 810         key = "off_by";
 811         goto try_now;
 812     }
 813     else
 814         goto unknown_key;
 815
 816     return TRUE;
 817 unknown_key:
 818     sampler_layer_apply_unknown(l, key, value);
 819     g_warning("Unknown SFZ property key: '%s'", key);
 820     return TRUE;
 821 }
 822
 823 #define TYPE_PRINTF_uint32_t(name, def_value) \
 824     if (show_inherited || l->has_##name) \
 825         g_string_append_printf(outstr, " %s=%u", #name, (unsigned)(l->name));
 826 #define TYPE_PRINTF_int(name, def_value) \
 827     if (show_inherited || l->has_##name) \
 828         g_string_append_printf(outstr, " %s=%d", #name, (int)(l->name));
 829 #define TYPE_PRINTF_midi_note_t(name, def_value) \
 830     if (show_inherited || l->has_##name) { \
 831         int val = l->name; \
 832         if (val == -1) \
 833             g_string_append_printf(outstr, " %s=-1", #name); \
 834         else \
 835             g_string_append_printf(outstr, " %s=%c%s%d", #name, "ccddeffggaab"[val%12], "\000#\000#\000\000#\000#\000#\000#\000"+(val%12), (val/12-1)); \
 836     } else {}
 837 #define TYPE_PRINTF_float(name, def_value) \
 838     if (show_inherited || l->has_##name) \
 839         g_string_append_printf(outstr, " %s=%s", #name, g_ascii_dtostr(floatbuf, floatbufsize, l->name));
 840
 841 #define PROC_FIELDS_TO_FILEPTR(type, name, def_value) \
 842     TYPE_PRINTF_##type(name, def_value)
 843 #define PROC_FIELDS_TO_FILEPTR_string(name) \
 844     if (show_inherited || l->has_##name) \
 845         g_string_append_printf(outstr, " %s=%s", #name, l->name ? l->name : "");
 846 #define PROC_FIELDS_TO_FILEPTR_dBamp(type, name, def_value) \
 847     if (show_inherited || l->has_##name) \
 848         g_string_append_printf(outstr, " %s=%s", #name, g_ascii_dtostr(floatbuf, floatbufsize, l->name));
 849 #define PROC_FIELDS_TO_FILEPTR_enum(enumtype, name, def_value) \
 850     if ((show_inherited || l->has_##name) && (tmpstr = enumtype##_to_string(l->name)) != NULL) \
 851         g_string_append_printf(outstr, " %s=%s", #name, tmpstr);
 852
 853 #define ENV_PARAM_OUTPUT(param, index, def_value, env, envfield, envname) \
 854     if (show_inherited || l->has_##envfield.param) \
 855         g_string_append_printf(outstr, " " #envname "_" #param "=%s", g_ascii_dtostr(floatbuf, floatbufsize, env.param));
 856
 857 #define PROC_FIELDS_TO_FILEPTR_dahdsr(name, parname, index) \
 858     DAHDSR_FIELDS(ENV_PARAM_OUTPUT, l->name, name, parname)
 859 #define PROC_FIELDS_TO_FILEPTR_lfo(name, parname, index) \
 860     LFO_FIELDS(ENV_PARAM_OUTPUT, l->name, name, parname)
 861 #define PROC_FIELDS_TO_FILEPTR_ccrange(name) \
 862     if (l->has_##name##locc) \
 863         g_string_append_printf(outstr, " " #name "locc%d=%d", l->name##cc_number, l->name##locc); \
 864     if (l->has_##name##hicc) \
 865         g_string_append_printf(outstr, " " #name "hicc%d=%d", l->name##cc_number, l->name##hicc);
 866
 867 gchar *sampler_layer_to_string(struct sampler_layer *lr, gboolean show_inherited)
 868 {
 869     struct sampler_layer_data *l = &lr->data;
 870     GString *outstr = g_string_sized_new(200);
 871     const char *tmpstr;
 872     char floatbuf[G_ASCII_DTOSTR_BUF_SIZE];
 873     int floatbufsize = G_ASCII_DTOSTR_BUF_SIZE;
 874     SAMPLER_FIXED_FIELDS(PROC_FIELDS_TO_FILEPTR)
 875
 876     static const char *addrandom_variants[] = { "amp", "fil", "pitch" };
 877     static const char *modsrc_names[] = { "chanaft", "vel", "polyaft", "pitch", "pitcheg", "fileg", "ampeg", "pitchlfo", "fillfo", "amplfo", "" };
 878     static const char *moddest_names[] = { "gain", "pitch", "cutoff", "resonance" };
 879     for(GSList *nif = l->nifs; nif; nif = nif->next)
 880     {
 881         struct sampler_noteinitfunc *nd = nif->data;
 882         if (!nd->has_value && !show_inherited)
 883             continue;
 884         #define PROC_ENVSTAGE_NAME(name, index, def_value) #name,
 885         static const char *env_stages[] = { DAHDSR_FIELDS(PROC_ENVSTAGE_NAME) };
 886         int v = nd->variant;
 887         g_ascii_dtostr(floatbuf, floatbufsize, nd->param);
 888
 889         if (nd->notefunc == sampler_nif_addrandom && v >= 0 && v <= 2)
 890             g_string_append_printf(outstr, " %s_random=%s", addrandom_variants[nd->variant], floatbuf);
 891         else if (nd->notefunc == sampler_nif_vel2pitch)
 892             g_string_append_printf(outstr, " pitch_veltrack=%s", floatbuf);
 893         else if (nd->notefunc == sampler_nif_cc2delay && v >= 0 && v < 120)
 894             g_string_append_printf(outstr, " delay_cc%d=%s", nd->variant, floatbuf);
 895         else if (nd->notefunc == sampler_nif_vel2env && v >= 0 && (v & 15) < 6 && (v >> 4) < 3)
 896             g_string_append_printf(outstr, " %seg_vel2%s=%s", addrandom_variants[nd->variant >> 4], env_stages[1 + (v & 15)], floatbuf);
 897     }
 898     for(GSList *mod = l->modulations; mod; mod = mod->next)
 899     {
 900         struct sampler_modulation *md = mod->data;
 901         if (!md->has_value && !show_inherited)
 902             continue;
 903         g_ascii_dtostr(floatbuf, floatbufsize, md->amount);
 904
 905         if (md->src2 == smsrc_none)
 906         {
 907             if (md->src < 120)
 908             {
 909                 g_string_append_printf(outstr, " %s_cc%d=%s", moddest_names[md->dest], md->src, floatbuf);
 910                 continue;
 911             }
 912             if (md->src < 120 + sizeof(modsrc_names) / sizeof(modsrc_names[0]))
 913             {
 914                 if ((md->src == smsrc_filenv && md->dest == smdest_cutoff) ||
 915                     (md->src == smsrc_pitchenv && md->dest == smdest_pitch))
 916                     g_string_append_printf(outstr, " %s_depth=%s", modsrc_names[md->src - 120], floatbuf);
 917                 else
 918                     g_string_append_printf(outstr, " %s_%s=%s", moddest_names[md->dest], modsrc_names[md->src - 120], floatbuf);
 919                 continue;
 920             }
 921         }
 922         if ((md->src == smsrc_amplfo && md->dest == smdest_gain) ||
 923             (md->src == smsrc_fillfo && md->dest == smdest_cutoff) ||
 924             (md->src == smsrc_pitchlfo && md->dest == smdest_pitch))
 925         {
 926             switch(md->src2)
 927             {
 928             case smsrc_chanaft:
 929             case smsrc_polyaft:
 930                 g_string_append_printf(outstr, " %slfo_depth%s=%s", moddest_names[md->dest], modsrc_names[md->src2 - 120], floatbuf);
 931                 continue;
 932             default:
 933                 if (md->src2 < 120)
 934                 {
 935                     g_string_append_printf(outstr, " %slfo_depthcc%d=%s", moddest_names[md->dest], md->src2, floatbuf);
 936                     continue;
 937                 }
 938                 break;
 939             }
 940             break;
 941         }
 942         if ((md->src == smsrc_ampenv && md->dest == smdest_gain) ||
 943             (md->src == smsrc_filenv && md->dest == smdest_cutoff) ||
 944             (md->src == smsrc_pitchenv && md->dest == smdest_pitch))
 945         {
 946             if (md->src2 == smsrc_vel)
 947             {
 948                 g_string_append_printf(outstr, " %seg_vel2depth=%s", moddest_names[md->dest], floatbuf);
 949                 continue;
 950             }
 951             if (md->src2 < 120)
 952             {
 953                 g_string_append_printf(outstr, " %s_depthcc%d=%s", modsrc_names[md->src - 120], md->src2, floatbuf);
 954                 continue;
 955             }
 956         }
 957         g_string_append_printf(outstr, " genericmod_from_%d_and_%d_to_%d=%s", md->src, md->src2, md->dest, floatbuf);
 958     }
 959
 960     if (lr->unknown_keys)
 961     {
 962         GHashTableIter hti;
 963         gchar *key, *value;
 964         g_hash_table_iter_init(&hti, lr->unknown_keys);
 965         while(g_hash_table_iter_next(&hti, (gpointer *)&key, (gpointer *)&value))
 966             g_string_append_printf(outstr, " %s=%s", key, value);
 967     }
 968
 969     gchar *res = outstr->str;
 970     g_string_free(outstr, FALSE);
 971     return res;
 972 }
 973
 974 void sampler_layer_dump(struct sampler_layer *l, FILE *f)
 975 {
 976     gchar *str = sampler_layer_to_string(l, FALSE);
 977     fprintf(f, "%s\n", str);
 978 }
 979
 980 void sampler_layer_data_close(struct sampler_layer_data *l)
 981 {
 982     g_slist_free_full(l->nifs, g_free);
 983     g_slist_free_full(l->modulations, g_free);
 984     if (l->eff_waveform)
 985     {
 986         cbox_waveform_unref(l->eff_waveform);
 987         l->eff_waveform = NULL;
 988     }
 989     g_free(l->sample);
 990 }
 991
 992 void sampler_layer_data_destroy(struct sampler_layer_data *l)
 993 {
 994     sampler_layer_data_close(l);
 995     free(l);
 996 }
 997
 998 void sampler_layer_destroyfunc(struct cbox_objhdr *objhdr)
 999 {
1000     struct sampler_layer *l = CBOX_H2O(objhdr);
1001     struct sampler_program *prg = l->parent_program;
1002     assert(g_hash_table_size(l->child_layers) == 0);
1003
1004     if (l->parent_group)
1005     {
1006         g_hash_table_remove(l->parent_group->child_layers, l);
1007         if (prg && prg->rll)
1008         {
1009             sampler_program_delete_layer(prg, l);
1010             sampler_program_update_layers(l->parent_program);
1011         }
1012         l->parent_group = NULL;
1013     }
1014     sampler_layer_data_close(&l->data);
1015     if (l->runtime)
1016         sampler_layer_data_destroy(l->runtime);
1017     if (l->unknown_keys)
1018         g_hash_table_destroy(l->unknown_keys);
1019     if (l->child_layers)
1020         g_hash_table_destroy(l->child_layers);
1021
1022     free(l);
1023 }
1024
1025 //////////////////////////////////////////////////////////////////////////
1026
1027 struct sampler_layer_update_cmd
1028 {
1029     struct sampler_module *module;
1030     struct sampler_layer *layer;
1031     struct sampler_layer_data *new_data;
1032     struct sampler_layer_data *old_data;
1033 };
1034
1035 static int sampler_layer_update_cmd_prepare(void *data)
1036 {
1037     struct sampler_layer_update_cmd *cmd = data;
1038     cmd->old_data = cmd->layer->runtime;
1039     cmd->new_data = calloc(1, sizeof(struct sampler_layer_data));
1040
1041     sampler_layer_data_clone(cmd->new_data, &cmd->layer->data, TRUE);
1042     sampler_layer_data_finalize(cmd->new_data, cmd->layer->parent_group ? &cmd->layer->parent_group->data : NULL, cmd->layer->parent_program);
1043     if (cmd->layer->runtime == NULL)
1044     {
1045         // initial update of the layer, so none of the voices need updating yet
1046         // because the layer hasn't been allocated to any voice
1047         cmd->layer->runtime = cmd->new_data;
1048         return 1;
1049     }
1050     return 0;
1051 }
1052
1053 static int sampler_layer_update_cmd_execute(void *data)
1054 {
1055     struct sampler_layer_update_cmd *cmd = data;
1056
1057     for (int i = 0; i < 16; i++)
1058     {
1059         FOREACH_VOICE(cmd->module->channels[i].voices_running, v)
1060         {
1061             if (v->layer == cmd->old_data)
1062                 v->layer = cmd->new_data;
1063         }
1064     }
1065     cmd->layer->runtime = cmd->new_data;
1066     return 10;
1067 }
1068
1069 static void sampler_layer_update_cmd_cleanup(void *data)
1070 {
1071     struct sampler_layer_update_cmd *cmd = data;
1072
1073     sampler_layer_data_destroy(cmd->old_data);
1074 }
1075
1076 void sampler_layer_update(struct sampler_layer *l)
1077 {
1078     // if changing a group, update all child regions instead
1079     if (g_hash_table_size(l->child_layers))
1080     {
1081         GHashTableIter iter;
1082         g_hash_table_iter_init(&iter, l->child_layers);
1083         gpointer key, value;
1084         while(g_hash_table_iter_next(&iter, &key, &value))
1085         {
1086             sampler_layer_data_finalize(&((struct sampler_layer *)key)->data, &l->data, l->parent_program);
1087             sampler_layer_update((struct sampler_layer *)key);
1088         }
1089         return;
1090     }
1091     static struct cbox_rt_cmd_definition rtcmd = {
1092         .prepare = sampler_layer_update_cmd_prepare,
1093         .execute = sampler_layer_update_cmd_execute,
1094         .cleanup = sampler_layer_update_cmd_cleanup,
1095     };
1096
1097     struct sampler_layer_update_cmd lcmd;
1098     lcmd.module = l->module;
1099     lcmd.layer = l;
1100     lcmd.new_data = NULL;
1101     lcmd.old_data = NULL;
1102
1103     // In order to be able to use the async call, it would be necessary to
1104     // identify old data by layer pointer, not layer data pointer. For now,
1105     // it might be good enough to just use sync calls for this.
1106     cbox_rt_execute_cmd_sync(l->module->module.rt, &rtcmd, &lcmd);
1107 }
1108