/* 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 "fluidsynth_priv.h" #include "fluid_voice.h" #include "fluid_mod.h" #include "fluid_chan.h" #include "fluid_conv.h" #include "fluid_synth.h" #include "fluid_sys.h" #include "fluid_sfont.h" #include "fluid_rvoice_event.h" /* used for filter turn off optimization - if filter cutoff is above the specified value and filter q is below the other value, turn filter off */ #define FLUID_MAX_AUDIBLE_FILTER_FC 19000.0f #define FLUID_MIN_AUDIBLE_FILTER_Q 1.2f /* min vol envelope release (to stop clicks) in SoundFont timecents */ #define FLUID_MIN_VOLENVRELEASE -7200.0f /* ~16ms */ static int fluid_voice_calculate_runtime_synthesis_parameters(fluid_voice_t* voice); static int calculate_hold_decay_buffers(fluid_voice_t* voice, int gen_base, int gen_key2base, int is_decay); static fluid_real_t fluid_voice_get_lower_boundary_for_attenuation(fluid_voice_t* voice); #define UPDATE_RVOICE0(proc) \ do { \ if (voice->can_access_rvoice) proc(voice->rvoice); \ else fluid_rvoice_eventhandler_push(voice->channel->synth->eventhandler, \ proc, voice->rvoice, 0, 0.0f); \ } while (0) #define UPDATE_RVOICE_PTR(proc, obj) \ do { \ if (voice->can_access_rvoice) proc(voice->rvoice, obj); \ else fluid_rvoice_eventhandler_push_ptr(voice->channel->synth->eventhandler, \ proc, voice->rvoice, obj); \ } while (0) #define UPDATE_RVOICE_GENERIC_R1(proc, obj, rarg) \ do { \ if (voice->can_access_rvoice) proc(obj, rarg); \ else fluid_rvoice_eventhandler_push(voice->channel->synth->eventhandler, \ proc, obj, 0, rarg); \ } while (0) #define UPDATE_RVOICE_GENERIC_I1(proc, obj, iarg) \ do { \ if (voice->can_access_rvoice) proc(obj, iarg); \ else fluid_rvoice_eventhandler_push(voice->channel->synth->eventhandler, \ proc, obj, iarg, 0.0f); \ } while (0) #define UPDATE_RVOICE_GENERIC_IR(proc, obj, iarg, rarg) \ do { \ if (voice->can_access_rvoice) proc(obj, iarg, rarg); \ else fluid_rvoice_eventhandler_push(voice->channel->synth->eventhandler, \ proc, obj, iarg, rarg); \ } while (0) #define UPDATE_RVOICE_GENERIC_ALL(proc, obj, iarg, r1, r2, r3, r4, r5) \ do { \ if (voice->can_access_rvoice) proc(obj, iarg, r1, r2, r3, r4, r5); \ else fluid_rvoice_eventhandler_push5(voice->channel->synth->eventhandler, \ proc, obj, iarg, r1, r2, r3, r4, r5); \ } while (0) #define UPDATE_RVOICE_VOLENV(section, arg1, arg2, arg3, arg4, arg5) \ do { \ fluid_adsr_env_set_data(&voice->volenv, section, arg1, arg2, arg3, arg4, arg5) \ UPDATE_RVOICE_GENERIC_ALL(fluid_adsr_env_set_data, &voice->rvoice->envlfo.volenv, section, arg1, arg2, arg3, arg4, arg5) \ } while(0) #define UPDATE_RVOICE_MODENV(section, arg1, arg2, arg3, arg4, arg5) \ UPDATE_RVOICE_GENERIC_ALL(fluid_adsr_env_set_data, &voice->rvoice->envlfo.modenv, section, arg1, arg2, arg3, arg4, arg5) #define UPDATE_RVOICE_R1(proc, arg1) UPDATE_RVOICE_GENERIC_R1(proc, voice->rvoice, arg1) #define UPDATE_RVOICE_I1(proc, arg1) UPDATE_RVOICE_GENERIC_I1(proc, voice->rvoice, arg1) #define UPDATE_RVOICE_FILTER1(proc, arg1) UPDATE_RVOICE_GENERIC_R1(proc, &voice->rvoice->resonant_filter, arg1) #define UPDATE_RVOICE2(proc, iarg, rarg) UPDATE_RVOICE_GENERIC_IR(proc, voice->rvoice, iarg, rarg) #define UPDATE_RVOICE_BUFFERS2(proc, iarg, rarg) UPDATE_RVOICE_GENERIC_IR(proc, &voice->rvoice->buffers, iarg, rarg) #define UPDATE_RVOICE_ENVLFO_R1(proc, envp, rarg) UPDATE_RVOICE_GENERIC_R1(proc, &voice->rvoice->envlfo.envp, rarg) #define UPDATE_RVOICE_ENVLFO_I1(proc, envp, iarg) UPDATE_RVOICE_GENERIC_I1(proc, &voice->rvoice->envlfo.envp, iarg) static inline void fluid_voice_update_volenv(fluid_voice_t* voice, fluid_adsr_env_section_t section, unsigned int count, fluid_real_t coeff, fluid_real_t increment, fluid_real_t min, fluid_real_t max) { fluid_adsr_env_set_data(&voice->volenv, section, count, coeff, increment, min, max); UPDATE_RVOICE_GENERIC_ALL(fluid_adsr_env_set_data, &voice->rvoice->envlfo.volenv, section, count, coeff, increment, min, max); } static inline void fluid_voice_update_modenv(fluid_voice_t* voice, fluid_adsr_env_section_t section, unsigned int count, fluid_real_t coeff, fluid_real_t increment, fluid_real_t min, fluid_real_t max) { UPDATE_RVOICE_GENERIC_ALL(fluid_adsr_env_set_data, &voice->rvoice->envlfo.modenv, section, count, coeff, increment, min, max); } static inline void fluid_sample_null_ptr(fluid_sample_t** sample) { if (*sample != NULL) { fluid_sample_decr_ref(*sample); *sample = NULL; } } /* * Swaps the current rvoice with the current overflow_rvoice */ static void fluid_voice_swap_rvoice(fluid_voice_t* voice) { fluid_rvoice_t* rtemp = voice->rvoice; int ctemp = voice->can_access_rvoice; voice->rvoice = voice->overflow_rvoice; voice->can_access_rvoice = voice->can_access_overflow_rvoice; voice->overflow_rvoice = rtemp; voice->can_access_overflow_rvoice = ctemp; } static void fluid_voice_initialize_rvoice(fluid_voice_t* voice) { FLUID_MEMSET(voice->rvoice, 0, sizeof(fluid_rvoice_t)); /* The 'sustain' and 'finished' segments of the volume / modulation * envelope are constant. They are never affected by any modulator * or generator. Therefore it is enough to initialize them once * during the lifetime of the synth. */ fluid_voice_update_volenv(voice, FLUID_VOICE_ENVSUSTAIN, 0xffffffff, 1.0f, 0.0f, -1.0f, 2.0f); fluid_voice_update_volenv(voice, FLUID_VOICE_ENVFINISHED, 0xffffffff, 0.0f, 0.0f, -1.0f, 1.0f); fluid_voice_update_modenv(voice, FLUID_VOICE_ENVSUSTAIN, 0xffffffff, 1.0f, 0.0f, -1.0f, 2.0f); fluid_voice_update_modenv(voice, FLUID_VOICE_ENVFINISHED, 0xffffffff, 0.0f, 0.0f, -1.0f, 1.0f); } /* * new_fluid_voice */ fluid_voice_t* new_fluid_voice(fluid_real_t output_rate) { fluid_voice_t* voice; voice = FLUID_NEW(fluid_voice_t); if (voice == NULL) { FLUID_LOG(FLUID_ERR, "Out of memory"); return NULL; } voice->rvoice = FLUID_NEW(fluid_rvoice_t); voice->overflow_rvoice = FLUID_NEW(fluid_rvoice_t); if (voice->rvoice == NULL || voice->overflow_rvoice == NULL) { FLUID_LOG(FLUID_ERR, "Out of memory"); FLUID_FREE(voice->rvoice); FLUID_FREE(voice); return NULL; } voice->status = FLUID_VOICE_CLEAN; voice->chan = NO_CHANNEL; voice->key = 0; voice->vel = 0; voice->channel = NULL; voice->sample = NULL; /* Initialize both the rvoice and overflow_rvoice */ voice->can_access_rvoice = 1; voice->can_access_overflow_rvoice = 1; fluid_voice_initialize_rvoice(voice); fluid_voice_swap_rvoice(voice); fluid_voice_initialize_rvoice(voice); fluid_voice_set_output_rate(voice, output_rate); return voice; } /* * delete_fluid_voice */ int delete_fluid_voice(fluid_voice_t* voice) { if (voice == NULL) { return FLUID_OK; } if (!voice->can_access_rvoice || !voice->can_access_overflow_rvoice) { /* stop rvoice before deleting voice! */ return FLUID_FAILED; } FLUID_FREE(voice->overflow_rvoice); FLUID_FREE(voice->rvoice); FLUID_FREE(voice); return FLUID_OK; } /* fluid_voice_init * * Initialize the synthesis process */ int fluid_voice_init(fluid_voice_t* voice, fluid_sample_t* sample, fluid_channel_t* channel, int key, int vel, unsigned int id, unsigned int start_time, fluid_real_t gain) { /* Note: The voice parameters will be initialized later, when the * generators have been retrieved from the sound font. Here, only * the 'working memory' of the voice (position in envelopes, history * of IIR filters, position in sample etc) is initialized. */ int i; if (!voice->can_access_rvoice) { if (voice->can_access_overflow_rvoice) fluid_voice_swap_rvoice(voice); else { FLUID_LOG(FLUID_ERR, "Internal error: Cannot access an rvoice in fluid_voice_init!"); return FLUID_FAILED; } } /* We are now guaranteed to have access to the rvoice */ if (voice->sample) fluid_voice_off(voice); voice->id = id; voice->chan = fluid_channel_get_num(channel); voice->key = (unsigned char) key; voice->vel = (unsigned char) vel; voice->channel = channel; voice->mod_count = 0; voice->start_time = start_time; voice->debug = 0; voice->has_noteoff = 0; UPDATE_RVOICE0(fluid_rvoice_reset); /* Increment the reference count of the sample to prevent the unloading of the soundfont while this voice is playing, once for us and once for the rvoice. */ fluid_sample_incr_ref(sample); UPDATE_RVOICE_PTR(fluid_rvoice_set_sample, sample); fluid_sample_incr_ref(sample); voice->sample = sample; i = fluid_channel_get_interp_method(channel); UPDATE_RVOICE_I1(fluid_rvoice_set_interp_method, i); /* Set all the generators to their default value, according to SF * 2.01 section 8.1.3 (page 48). The value of NRPN messages are * copied from the channel to the voice's generators. The sound font * loader overwrites them. The generator values are later converted * into voice parameters in * fluid_voice_calculate_runtime_synthesis_parameters. */ fluid_gen_init(&voice->gen[0], channel); UPDATE_RVOICE_I1(fluid_rvoice_set_samplemode, _SAMPLEMODE(voice)); voice->synth_gain = gain; /* avoid division by zero later*/ if (voice->synth_gain < 0.0000001){ voice->synth_gain = 0.0000001; } UPDATE_RVOICE_R1(fluid_rvoice_set_synth_gain, voice->synth_gain); /* Set up buffer mapping, should be done more flexible in the future. */ i = channel->synth->audio_groups; UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_mapping, 2, i*2 + SYNTH_REVERB_CHANNEL); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_mapping, 3, i*2 + SYNTH_CHORUS_CHANNEL); i = 2 * (voice->chan % i); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_mapping, 0, i); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_mapping, 1, i+1); return FLUID_OK; } /** * Update sample rate. * NOTE: If the voice is active, it will be turned off. */ int fluid_voice_set_output_rate(fluid_voice_t* voice, fluid_real_t value) { if (_PLAYING(voice)) fluid_voice_off(voice); voice->output_rate = value; UPDATE_RVOICE_R1(fluid_rvoice_set_output_rate, value); /* Update the other rvoice as well */ fluid_voice_swap_rvoice(voice); UPDATE_RVOICE_R1(fluid_rvoice_set_output_rate, value); fluid_voice_swap_rvoice(voice); return FLUID_FAILED; } /** * Set the value of a generator. * @param voice Voice instance * @param i Generator ID (#fluid_gen_type) * @param val Generator value */ void fluid_voice_gen_set(fluid_voice_t* voice, int i, float val) { voice->gen[i].val = val; voice->gen[i].flags = GEN_SET; if (i == GEN_SAMPLEMODE) UPDATE_RVOICE_I1(fluid_rvoice_set_samplemode, (int) val); } /** * Offset the value of a generator. * @param voice Voice instance * @param i Generator ID (#fluid_gen_type) * @param val Value to add to the existing value */ void fluid_voice_gen_incr(fluid_voice_t* voice, int i, float val) { voice->gen[i].val += val; voice->gen[i].flags = GEN_SET; } /** * Get the value of a generator. * @param voice Voice instance * @param gen Generator ID (#fluid_gen_type) * @return Current generator value */ float fluid_voice_gen_get(fluid_voice_t* voice, int gen) { return voice->gen[gen].val; } fluid_real_t fluid_voice_gen_value(fluid_voice_t* voice, int num) { /* This is an extension to the SoundFont standard. More * documentation is available at the fluid_synth_set_gen2() * function. */ if (voice->gen[num].flags == GEN_ABS_NRPN) { return (fluid_real_t) voice->gen[num].nrpn; } else { return (fluid_real_t) (voice->gen[num].val + voice->gen[num].mod + voice->gen[num].nrpn); } } /** * Synthesize a voice to a buffer. * * @param voice Voice to synthesize * @param dsp_buf Audio buffer to synthesize to (#FLUID_BUFSIZE in length) * @return Count of samples written to dsp_buf (can be 0) * * Panning, reverb and chorus are processed separately. The dsp interpolation * routine is in (fluid_dsp_float.c). */ int fluid_voice_write (fluid_voice_t* voice, fluid_real_t *dsp_buf) { int result; if (!voice->can_access_rvoice) return 0; result = fluid_rvoice_write(voice->rvoice, dsp_buf); if (result == -1) return 0; if ((result < FLUID_BUFSIZE) && _PLAYING(voice)) /* Voice finished by itself */ fluid_voice_off(voice); return result; } /** * Mix voice data to left/right (panning), reverb and chorus buffers. * @param count Number of samples * @param dsp_buf Source buffer * @param voice Voice to mix * @param left_buf Left audio buffer * @param right_buf Right audio buffer * @param reverb_buf Reverb buffer * @param chorus_buf Chorus buffer * */ void fluid_voice_mix (fluid_voice_t *voice, int count, fluid_real_t* dsp_buf, fluid_real_t* left_buf, fluid_real_t* right_buf, fluid_real_t* reverb_buf, fluid_real_t* chorus_buf) { fluid_rvoice_buffers_t buffers; fluid_real_t* dest_buf[4] = {left_buf, right_buf, reverb_buf, chorus_buf}; fluid_rvoice_buffers_set_amp(&buffers, 0, voice->amp_left); fluid_rvoice_buffers_set_amp(&buffers, 1, voice->amp_right); fluid_rvoice_buffers_set_amp(&buffers, 2, voice->amp_reverb); fluid_rvoice_buffers_set_amp(&buffers, 3, voice->amp_chorus); fluid_rvoice_buffers_mix(&buffers, dsp_buf, count, dest_buf, 4); fluid_check_fpe ("voice_mix"); } /* * fluid_voice_start */ void fluid_voice_start(fluid_voice_t* voice) { /* The maximum volume of the loop is calculated and cached once for each * sample with its nominal loop settings. This happens, when the sample is used * for the first time.*/ fluid_voice_calculate_runtime_synthesis_parameters(voice); voice->ref = fluid_profile_ref(); voice->status = FLUID_VOICE_ON; /* Increment voice count */ voice->channel->synth->active_voice_count++; } void fluid_voice_calculate_gen_pitch(fluid_voice_t* voice) { fluid_tuning_t* tuning; fluid_real_t x; /* The GEN_PITCH is a hack to fit the pitch bend controller into the * modulator paradigm. Now the nominal pitch of the key is set. * Note about SCALETUNE: SF2.01 8.1.3 says, that this generator is a * non-realtime parameter. So we don't allow modulation (as opposed * to _GEN(voice, GEN_SCALETUNE) When the scale tuning is varied, * one key remains fixed. Here C3 (MIDI number 60) is used. */ if (fluid_channel_has_tuning(voice->channel)) { tuning = fluid_channel_get_tuning (voice->channel); x = fluid_tuning_get_pitch (tuning, (int)(voice->root_pitch / 100.0f)); voice->gen[GEN_PITCH].val = voice->gen[GEN_SCALETUNE].val / 100.0f * (fluid_tuning_get_pitch (tuning, voice->key) - x) + x; } else { voice->gen[GEN_PITCH].val = voice->gen[GEN_SCALETUNE].val * (voice->key - voice->root_pitch / 100.0f) + voice->root_pitch; } } /* * fluid_voice_calculate_runtime_synthesis_parameters * * in this function we calculate the values of all the parameters. the * parameters are converted to their most useful unit for the DSP * algorithm, for example, number of samples instead of * timecents. Some parameters keep their "perceptual" unit and * conversion will be done in the DSP function. This is the case, for * example, for the pitch since it is modulated by the controllers in * cents. */ static int fluid_voice_calculate_runtime_synthesis_parameters(fluid_voice_t* voice) { int i; int list_of_generators_to_initialize[35] = { GEN_STARTADDROFS, /* SF2.01 page 48 #0 */ GEN_ENDADDROFS, /* #1 */ GEN_STARTLOOPADDROFS, /* #2 */ GEN_ENDLOOPADDROFS, /* #3 */ /* GEN_STARTADDRCOARSEOFS see comment below [1] #4 */ GEN_MODLFOTOPITCH, /* #5 */ GEN_VIBLFOTOPITCH, /* #6 */ GEN_MODENVTOPITCH, /* #7 */ GEN_FILTERFC, /* #8 */ GEN_FILTERQ, /* #9 */ GEN_MODLFOTOFILTERFC, /* #10 */ GEN_MODENVTOFILTERFC, /* #11 */ /* GEN_ENDADDRCOARSEOFS [1] #12 */ GEN_MODLFOTOVOL, /* #13 */ /* not defined #14 */ GEN_CHORUSSEND, /* #15 */ GEN_REVERBSEND, /* #16 */ GEN_PAN, /* #17 */ /* not defined #18 */ /* not defined #19 */ /* not defined #20 */ GEN_MODLFODELAY, /* #21 */ GEN_MODLFOFREQ, /* #22 */ GEN_VIBLFODELAY, /* #23 */ GEN_VIBLFOFREQ, /* #24 */ GEN_MODENVDELAY, /* #25 */ GEN_MODENVATTACK, /* #26 */ GEN_MODENVHOLD, /* #27 */ GEN_MODENVDECAY, /* #28 */ /* GEN_MODENVSUSTAIN [1] #29 */ GEN_MODENVRELEASE, /* #30 */ /* GEN_KEYTOMODENVHOLD [1] #31 */ /* GEN_KEYTOMODENVDECAY [1] #32 */ GEN_VOLENVDELAY, /* #33 */ GEN_VOLENVATTACK, /* #34 */ GEN_VOLENVHOLD, /* #35 */ GEN_VOLENVDECAY, /* #36 */ /* GEN_VOLENVSUSTAIN [1] #37 */ GEN_VOLENVRELEASE, /* #38 */ /* GEN_KEYTOVOLENVHOLD [1] #39 */ /* GEN_KEYTOVOLENVDECAY [1] #40 */ /* GEN_STARTLOOPADDRCOARSEOFS [1] #45 */ GEN_KEYNUM, /* #46 */ GEN_VELOCITY, /* #47 */ GEN_ATTENUATION, /* #48 */ /* GEN_ENDLOOPADDRCOARSEOFS [1] #50 */ /* GEN_COARSETUNE [1] #51 */ /* GEN_FINETUNE [1] #52 */ GEN_OVERRIDEROOTKEY, /* #58 */ GEN_PITCH, /* --- */ -1}; /* end-of-list marker */ /* When the voice is made ready for the synthesis process, a lot of * voice-internal parameters have to be calculated. * * At this point, the sound font has already set the -nominal- value * for all generators (excluding GEN_PITCH). Most generators can be * modulated - they include a nominal value and an offset (which * changes with velocity, note number, channel parameters like * aftertouch, mod wheel...) Now this offset will be calculated as * follows: * * - Process each modulator once. * - Calculate its output value. * - Find the target generator. * - Add the output value to the modulation value of the generator. * * Note: The generators have been initialized with * fluid_gen_set_default_values. */ for (i = 0; i < voice->mod_count; i++) { fluid_mod_t* mod = &voice->mod[i]; fluid_real_t modval = fluid_mod_get_value(mod, voice->channel, voice); int dest_gen_index = mod->dest; fluid_gen_t* dest_gen = &voice->gen[dest_gen_index]; dest_gen->mod += modval; /* fluid_dump_modulator(mod); */ } /* Now the generators are initialized, nominal and modulation value. * The voice parameters (which depend on generators) are calculated * with fluid_voice_update_param. Processing the list of generator * changes will calculate each voice parameter once. * * Note [1]: Some voice parameters depend on several generators. For * example, the pitch depends on GEN_COARSETUNE, GEN_FINETUNE and * GEN_PITCH. voice->pitch. Unnecessary recalculation is avoided * by removing all but one generator from the list of voice * parameters. Same with GEN_XXX and GEN_XXXCOARSE: the * initialisation list contains only GEN_XXX. */ /* Calculate the voice parameter(s) dependent on each generator. */ for (i = 0; list_of_generators_to_initialize[i] != -1; i++) { fluid_voice_update_param(voice, list_of_generators_to_initialize[i]); } /* Make an estimate on how loud this voice can get at any time (attenuation). */ UPDATE_RVOICE_R1(fluid_rvoice_set_min_attenuation_cB, fluid_voice_get_lower_boundary_for_attenuation(voice)); return FLUID_OK; } /* * calculate_hold_decay_buffers */ static int calculate_hold_decay_buffers(fluid_voice_t* voice, int gen_base, int gen_key2base, int is_decay) { /* Purpose: * * Returns the number of DSP loops, that correspond to the hold * (is_decay=0) or decay (is_decay=1) time. * gen_base=GEN_VOLENVHOLD, GEN_VOLENVDECAY, GEN_MODENVHOLD, * GEN_MODENVDECAY gen_key2base=GEN_KEYTOVOLENVHOLD, * GEN_KEYTOVOLENVDECAY, GEN_KEYTOMODENVHOLD, GEN_KEYTOMODENVDECAY */ fluid_real_t timecents; fluid_real_t seconds; int buffers; /* SF2.01 section 8.4.3 # 31, 32, 39, 40 * GEN_KEYTOxxxENVxxx uses key 60 as 'origin'. * The unit of the generator is timecents per key number. * If KEYTOxxxENVxxx is 100, a key one octave over key 60 (72) * will cause (60-72)*100=-1200 timecents of time variation. * The time is cut in half. */ timecents = (_GEN(voice, gen_base) + _GEN(voice, gen_key2base) * (60.0 - voice->key)); /* Range checking */ if (is_decay){ /* SF 2.01 section 8.1.3 # 28, 36 */ if (timecents > 8000.0) { timecents = 8000.0; } } else { /* SF 2.01 section 8.1.3 # 27, 35 */ if (timecents > 5000) { timecents = 5000.0; } /* SF 2.01 section 8.1.2 # 27, 35: * The most negative number indicates no hold time */ if (timecents <= -32768.) { return 0; } } /* SF 2.01 section 8.1.3 # 27, 28, 35, 36 */ if (timecents < -12000.0) { timecents = -12000.0; } seconds = fluid_tc2sec(timecents); /* Each DSP loop processes FLUID_BUFSIZE samples. */ /* round to next full number of buffers */ buffers = (int)(((fluid_real_t)voice->output_rate * seconds) / (fluid_real_t)FLUID_BUFSIZE +0.5); return buffers; } /* * The value of a generator (gen) has changed. (The different * generators are listed in fluidsynth.h, or in SF2.01 page 48-49) * Now the dependent 'voice' parameters are calculated. * * fluid_voice_update_param can be called during the setup of the * voice (to calculate the initial value for a voice parameter), or * during its operation (a generator has been changed due to * real-time parameter modifications like pitch-bend). * * Note: The generator holds three values: The base value .val, an * offset caused by modulators .mod, and an offset caused by the * NRPN system. _GEN(voice, generator_enumerator) returns the sum * of all three. */ /** * Update all the synthesis parameters, which depend on generator \a gen. * @param voice Voice instance * @param gen Generator id (#fluid_gen_type) * * This is only necessary after changing a generator of an already operating voice. * Most applications will not need this function. */ void fluid_voice_update_param(fluid_voice_t* voice, int gen) { double q_dB; fluid_real_t x; fluid_real_t y; unsigned int count, z; // Alternate attenuation scale used by EMU10K1 cards when setting the attenuation at the preset or instrument level within the SoundFont bank. static const float ALT_ATTENUATION_SCALE = 0.4; switch (gen) { case GEN_PAN: /* range checking is done in the fluid_pan function */ voice->pan = _GEN(voice, GEN_PAN); voice->amp_left = fluid_pan(voice->pan, 1) * voice->synth_gain / 32768.0f; voice->amp_right = fluid_pan(voice->pan, 0) * voice->synth_gain / 32768.0f; UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 0, voice->amp_left); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 1, voice->amp_right); break; case GEN_ATTENUATION: voice->attenuation = ((fluid_real_t)(voice)->gen[GEN_ATTENUATION].val*ALT_ATTENUATION_SCALE) + (fluid_real_t)(voice)->gen[GEN_ATTENUATION].mod + (fluid_real_t)(voice)->gen[GEN_ATTENUATION].nrpn; /* Range: SF2.01 section 8.1.3 # 48 * Motivation for range checking: * OHPiano.SF2 sets initial attenuation to a whooping -96 dB */ fluid_clip(voice->attenuation, 0.0, 1440.0); UPDATE_RVOICE_R1(fluid_rvoice_set_attenuation, voice->attenuation); break; /* The pitch is calculated from three different generators. * Read comment in fluidsynth.h about GEN_PITCH. */ case GEN_PITCH: case GEN_COARSETUNE: case GEN_FINETUNE: /* The testing for allowed range is done in 'fluid_ct2hz' */ voice->pitch = (_GEN(voice, GEN_PITCH) + 100.0f * _GEN(voice, GEN_COARSETUNE) + _GEN(voice, GEN_FINETUNE)); UPDATE_RVOICE_R1(fluid_rvoice_set_pitch, voice->pitch); break; case GEN_REVERBSEND: /* The generator unit is 'tenths of a percent'. */ voice->reverb_send = _GEN(voice, GEN_REVERBSEND) / 1000.0f; fluid_clip(voice->reverb_send, 0.0, 1.0); voice->amp_reverb = voice->reverb_send * voice->synth_gain / 32768.0f; UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 2, voice->amp_reverb); break; case GEN_CHORUSSEND: /* The generator unit is 'tenths of a percent'. */ voice->chorus_send = _GEN(voice, GEN_CHORUSSEND) / 1000.0f; fluid_clip(voice->chorus_send, 0.0, 1.0); voice->amp_chorus = voice->chorus_send * voice->synth_gain / 32768.0f; UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 3, voice->amp_chorus); break; case GEN_OVERRIDEROOTKEY: /* This is a non-realtime parameter. Therefore the .mod part of the generator * can be neglected. * NOTE: origpitch sets MIDI root note while pitchadj is a fine tuning amount * which offsets the original rate. This means that the fine tuning is * inverted with respect to the root note (so subtract it, not add). */ if (voice->sample != NULL) { if (voice->gen[GEN_OVERRIDEROOTKEY].val > -1) //FIXME: use flag instead of -1 voice->root_pitch = voice->gen[GEN_OVERRIDEROOTKEY].val * 100.0f - voice->sample->pitchadj; else voice->root_pitch = voice->sample->origpitch * 100.0f - voice->sample->pitchadj; x = (fluid_ct2hz(voice->root_pitch) * ((fluid_real_t) voice->output_rate / voice->sample->samplerate)); } else { if (voice->gen[GEN_OVERRIDEROOTKEY].val > -1) //FIXME: use flag instead of -1 voice->root_pitch = voice->gen[GEN_OVERRIDEROOTKEY].val * 100.0f; else voice->root_pitch = 0; x = fluid_ct2hz(voice->root_pitch); } /* voice->pitch depends on voice->root_pitch, so calculate voice->pitch now */ fluid_voice_calculate_gen_pitch(voice); UPDATE_RVOICE_R1(fluid_rvoice_set_root_pitch_hz, x); break; case GEN_FILTERFC: /* The resonance frequency is converted from absolute cents to * midicents .val and .mod are both used, this permits real-time * modulation. The allowed range is tested in the 'fluid_ct2hz' * function [PH,20021214] */ x = _GEN(voice, GEN_FILTERFC); UPDATE_RVOICE_FILTER1(fluid_iir_filter_set_fres, x); break; case GEN_FILTERQ: /* The generator contains 'centibels' (1/10 dB) => divide by 10 to * obtain dB */ q_dB = _GEN(voice, GEN_FILTERQ) / 10.0f; /* Range: SF2.01 section 8.1.3 # 8 (convert from cB to dB => /10) */ fluid_clip(q_dB, 0.0f, 96.0f); /* Short version: Modify the Q definition in a way, that a Q of 0 * dB leads to no resonance hump in the freq. response. * * Long version: From SF2.01, page 39, item 9 (initialFilterQ): * "The gain at the cutoff frequency may be less than zero when * zero is specified". Assume q_dB=0 / q_lin=1: If we would leave * q as it is, then this results in a 3 dB hump slightly below * fc. At fc, the gain is exactly the DC gain (0 dB). What is * (probably) meant here is that the filter does not show a * resonance hump for q_dB=0. In this case, the corresponding * q_lin is 1/sqrt(2)=0.707. The filter should have 3 dB of * attenuation at fc now. In this case Q_dB is the height of the * resonance peak not over the DC gain, but over the frequency * response of a non-resonant filter. This idea is implemented as * follows: */ q_dB -= 3.01f; UPDATE_RVOICE_FILTER1(fluid_iir_filter_set_q_dB, q_dB); break; case GEN_MODLFOTOPITCH: x = _GEN(voice, GEN_MODLFOTOPITCH); fluid_clip(x, -12000.0, 12000.0); UPDATE_RVOICE_R1(fluid_rvoice_set_modlfo_to_pitch, x); break; case GEN_MODLFOTOVOL: x = _GEN(voice, GEN_MODLFOTOVOL); fluid_clip(x, -960.0, 960.0); UPDATE_RVOICE_R1(fluid_rvoice_set_modlfo_to_vol, x); break; case GEN_MODLFOTOFILTERFC: x = _GEN(voice, GEN_MODLFOTOFILTERFC); fluid_clip(x, -12000, 12000); UPDATE_RVOICE_R1(fluid_rvoice_set_modlfo_to_fc, x); break; case GEN_MODLFODELAY: x = _GEN(voice, GEN_MODLFODELAY); fluid_clip(x, -12000.0f, 5000.0f); z = (unsigned int) (voice->output_rate * fluid_tc2sec_delay(x)); UPDATE_RVOICE_ENVLFO_I1(fluid_lfo_set_delay, modlfo, z); break; case GEN_MODLFOFREQ: /* - the frequency is converted into a delta value, per buffer of FLUID_BUFSIZE samples * - the delay into a sample delay */ x = _GEN(voice, GEN_MODLFOFREQ); fluid_clip(x, -16000.0f, 4500.0f); x = (4.0f * FLUID_BUFSIZE * fluid_act2hz(x) / voice->output_rate); UPDATE_RVOICE_ENVLFO_R1(fluid_lfo_set_incr, modlfo, x); break; case GEN_VIBLFOFREQ: /* vib lfo * * - the frequency is converted into a delta value, per buffer of FLUID_BUFSIZE samples * - the delay into a sample delay */ x = _GEN(voice, GEN_VIBLFOFREQ); fluid_clip(x, -16000.0f, 4500.0f); x = 4.0f * FLUID_BUFSIZE * fluid_act2hz(x) / voice->output_rate; UPDATE_RVOICE_ENVLFO_R1(fluid_lfo_set_incr, viblfo, x); break; case GEN_VIBLFODELAY: x = _GEN(voice,GEN_VIBLFODELAY); fluid_clip(x, -12000.0f, 5000.0f); z = (unsigned int) (voice->output_rate * fluid_tc2sec_delay(x)); UPDATE_RVOICE_ENVLFO_I1(fluid_lfo_set_delay, viblfo, z); break; case GEN_VIBLFOTOPITCH: x = _GEN(voice, GEN_VIBLFOTOPITCH); fluid_clip(x, -12000.0, 12000.0); UPDATE_RVOICE_R1(fluid_rvoice_set_viblfo_to_pitch, x); break; case GEN_KEYNUM: /* GEN_KEYNUM: SF2.01 page 46, item 46 * * If this generator is active, it forces the key number to its * value. Non-realtime controller. * * There is a flag, which should indicate, whether a generator is * enabled or not. But here we rely on the default value of -1. * */ x = _GEN(voice, GEN_KEYNUM); if (x >= 0){ voice->key = x; } break; case GEN_VELOCITY: /* GEN_VELOCITY: SF2.01 page 46, item 47 * * If this generator is active, it forces the velocity to its * value. Non-realtime controller. * * There is a flag, which should indicate, whether a generator is * enabled or not. But here we rely on the default value of -1. */ x = _GEN(voice, GEN_VELOCITY); if (x > 0) { voice->vel = x; } break; case GEN_MODENVTOPITCH: x = _GEN(voice, GEN_MODENVTOPITCH); fluid_clip(x, -12000.0, 12000.0); UPDATE_RVOICE_R1(fluid_rvoice_set_modenv_to_pitch, x); break; case GEN_MODENVTOFILTERFC: x = _GEN(voice,GEN_MODENVTOFILTERFC); /* Range: SF2.01 section 8.1.3 # 1 * Motivation for range checking: * Filter is reported to make funny noises now and then */ fluid_clip(x, -12000.0, 12000.0); UPDATE_RVOICE_R1(fluid_rvoice_set_modenv_to_fc, x); break; /* sample start and ends points * * Range checking is initiated via the * voice->check_sample_sanity flag, * because it is impossible to check here: * During the voice setup, all modulators are processed, while * the voice is inactive. Therefore, illegal settings may * occur during the setup (for example: First move the loop * end point ahead of the loop start point => invalid, then * move the loop start point forward => valid again. */ case GEN_STARTADDROFS: /* SF2.01 section 8.1.3 # 0 */ case GEN_STARTADDRCOARSEOFS: /* SF2.01 section 8.1.3 # 4 */ if (voice->sample != NULL) { z = (voice->sample->start + (int) _GEN(voice, GEN_STARTADDROFS) + 32768 * (int) _GEN(voice, GEN_STARTADDRCOARSEOFS)); UPDATE_RVOICE_I1(fluid_rvoice_set_start, z); } break; case GEN_ENDADDROFS: /* SF2.01 section 8.1.3 # 1 */ case GEN_ENDADDRCOARSEOFS: /* SF2.01 section 8.1.3 # 12 */ if (voice->sample != NULL) { z = (voice->sample->end + (int) _GEN(voice, GEN_ENDADDROFS) + 32768 * (int) _GEN(voice, GEN_ENDADDRCOARSEOFS)); UPDATE_RVOICE_I1(fluid_rvoice_set_end, z); } break; case GEN_STARTLOOPADDROFS: /* SF2.01 section 8.1.3 # 2 */ case GEN_STARTLOOPADDRCOARSEOFS: /* SF2.01 section 8.1.3 # 45 */ if (voice->sample != NULL) { z = (voice->sample->loopstart + (int) _GEN(voice, GEN_STARTLOOPADDROFS) + 32768 * (int) _GEN(voice, GEN_STARTLOOPADDRCOARSEOFS)); UPDATE_RVOICE_I1(fluid_rvoice_set_loopstart, z); } break; case GEN_ENDLOOPADDROFS: /* SF2.01 section 8.1.3 # 3 */ case GEN_ENDLOOPADDRCOARSEOFS: /* SF2.01 section 8.1.3 # 50 */ if (voice->sample != NULL) { z = (voice->sample->loopend + (int) _GEN(voice, GEN_ENDLOOPADDROFS) + 32768 * (int) _GEN(voice, GEN_ENDLOOPADDRCOARSEOFS)); UPDATE_RVOICE_I1(fluid_rvoice_set_loopend, z); } break; /* Conversion functions differ in range limit */ #define NUM_BUFFERS_DELAY(_v) (unsigned int) (voice->output_rate * fluid_tc2sec_delay(_v) / FLUID_BUFSIZE) #define NUM_BUFFERS_ATTACK(_v) (unsigned int) (voice->output_rate * fluid_tc2sec_attack(_v) / FLUID_BUFSIZE) #define NUM_BUFFERS_RELEASE(_v) (unsigned int) (voice->output_rate * fluid_tc2sec_release(_v) / FLUID_BUFSIZE) /* volume envelope * * - delay and hold times are converted to absolute number of samples * - sustain is converted to its absolute value * - attack, decay and release are converted to their increment per sample */ case GEN_VOLENVDELAY: /* SF2.01 section 8.1.3 # 33 */ x = _GEN(voice, GEN_VOLENVDELAY); fluid_clip(x, -12000.0f, 5000.0f); count = NUM_BUFFERS_DELAY(x); fluid_voice_update_volenv(voice, FLUID_VOICE_ENVDELAY, count, 0.0f, 0.0f, -1.0f, 1.0f); break; case GEN_VOLENVATTACK: /* SF2.01 section 8.1.3 # 34 */ x = _GEN(voice, GEN_VOLENVATTACK); fluid_clip(x, -12000.0f, 8000.0f); count = 1 + NUM_BUFFERS_ATTACK(x); fluid_voice_update_volenv(voice, FLUID_VOICE_ENVATTACK, count, 1.0f, count ? 1.0f / count : 0.0f, -1.0f, 1.0f); break; case GEN_VOLENVHOLD: /* SF2.01 section 8.1.3 # 35 */ case GEN_KEYTOVOLENVHOLD: /* SF2.01 section 8.1.3 # 39 */ count = calculate_hold_decay_buffers(voice, GEN_VOLENVHOLD, GEN_KEYTOVOLENVHOLD, 0); /* 0 means: hold */ fluid_voice_update_volenv(voice, FLUID_VOICE_ENVHOLD, count, 1.0f, 0.0f, -1.0f, 2.0f); break; case GEN_VOLENVDECAY: /* SF2.01 section 8.1.3 # 36 */ case GEN_VOLENVSUSTAIN: /* SF2.01 section 8.1.3 # 37 */ case GEN_KEYTOVOLENVDECAY: /* SF2.01 section 8.1.3 # 40 */ y = 1.0f - 0.001f * _GEN(voice, GEN_VOLENVSUSTAIN); fluid_clip(y, 0.0f, 1.0f); count = calculate_hold_decay_buffers(voice, GEN_VOLENVDECAY, GEN_KEYTOVOLENVDECAY, 1); /* 1 for decay */ fluid_voice_update_volenv(voice, FLUID_VOICE_ENVDECAY, count, 1.0f, count ? -1.0f / count : 0.0f, y, 2.0f); break; case GEN_VOLENVRELEASE: /* SF2.01 section 8.1.3 # 38 */ x = _GEN(voice, GEN_VOLENVRELEASE); fluid_clip(x, FLUID_MIN_VOLENVRELEASE, 8000.0f); count = 1 + NUM_BUFFERS_RELEASE(x); fluid_voice_update_volenv(voice, FLUID_VOICE_ENVRELEASE, count, 1.0f, count ? -1.0f / count : 0.0f, 0.0f, 1.0f); break; /* Modulation envelope */ case GEN_MODENVDELAY: /* SF2.01 section 8.1.3 # 25 */ x = _GEN(voice, GEN_MODENVDELAY); fluid_clip(x, -12000.0f, 5000.0f); fluid_voice_update_modenv(voice, FLUID_VOICE_ENVDELAY, NUM_BUFFERS_DELAY(x), 0.0f, 0.0f, -1.0f, 1.0f); break; case GEN_MODENVATTACK: /* SF2.01 section 8.1.3 # 26 */ x = _GEN(voice, GEN_MODENVATTACK); fluid_clip(x, -12000.0f, 8000.0f); count = 1 + NUM_BUFFERS_ATTACK(x); fluid_voice_update_modenv(voice, FLUID_VOICE_ENVATTACK, count, 1.0f, count ? 1.0f / count : 0.0f, -1.0f, 1.0f); break; case GEN_MODENVHOLD: /* SF2.01 section 8.1.3 # 27 */ case GEN_KEYTOMODENVHOLD: /* SF2.01 section 8.1.3 # 31 */ count = calculate_hold_decay_buffers(voice, GEN_MODENVHOLD, GEN_KEYTOMODENVHOLD, 0); /* 1 means: hold */ fluid_voice_update_modenv(voice, FLUID_VOICE_ENVHOLD, count, 1.0f, 0.0f, -1.0f, 2.0f); break; case GEN_MODENVDECAY: /* SF 2.01 section 8.1.3 # 28 */ case GEN_MODENVSUSTAIN: /* SF 2.01 section 8.1.3 # 29 */ case GEN_KEYTOMODENVDECAY: /* SF 2.01 section 8.1.3 # 32 */ count = calculate_hold_decay_buffers(voice, GEN_MODENVDECAY, GEN_KEYTOMODENVDECAY, 1); /* 1 for decay */ y = 1.0f - 0.001f * _GEN(voice, GEN_MODENVSUSTAIN); fluid_clip(y, 0.0f, 1.0f); fluid_voice_update_modenv(voice, FLUID_VOICE_ENVDECAY, count, 1.0f, count ? -1.0f / count : 0.0f, y, 2.0f); break; case GEN_MODENVRELEASE: /* SF 2.01 section 8.1.3 # 30 */ x = _GEN(voice, GEN_MODENVRELEASE); fluid_clip(x, -12000.0f, 8000.0f); count = 1 + NUM_BUFFERS_RELEASE(x); fluid_voice_update_modenv(voice, FLUID_VOICE_ENVRELEASE, count, 1.0f, count ? -1.0f / count : 0.0f, 0.0f, 2.0f); break; } /* switch gen */ } /** * Recalculate voice parameters for a given control. * @param voice the synthesis voice * @param cc flag to distinguish between a continous control and a channel control (pitch bend, ...) * @param ctrl the control number * * In this implementation, I want to make sure that all controllers * are event based: the parameter values of the DSP algorithm should * only be updates when a controller event arrived and not at every * iteration of the audio cycle (which would probably be feasible if * the synth was made in silicon). * * The update is done in three steps: * * - first, we look for all the modulators that have the changed * controller as a source. This will yield a list of generators that * will be changed because of the controller event. * * - For every changed generator, calculate its new value. This is the * sum of its original value plus the values of al the attached * modulators. * * - For every changed generator, convert its value to the correct * unit of the corresponding DSP parameter */ int fluid_voice_modulate(fluid_voice_t* voice, int cc, int ctrl) { int i, k; fluid_mod_t* mod; int gen; fluid_real_t modval; /* printf("Chan=%d, CC=%d, Src=%d, Val=%d\n", voice->channel->channum, cc, ctrl, val); */ for (i = 0; i < voice->mod_count; i++) { mod = &voice->mod[i]; /* step 1: find all the modulators that have the changed controller * as input source. */ if (fluid_mod_has_source(mod, cc, ctrl)) { gen = fluid_mod_get_dest(mod); modval = 0.0; /* step 2: for every changed modulator, calculate the modulation * value of its associated generator */ for (k = 0; k < voice->mod_count; k++) { if (fluid_mod_has_dest(&voice->mod[k], gen)) { modval += fluid_mod_get_value(&voice->mod[k], voice->channel, voice); } } fluid_gen_set_mod(&voice->gen[gen], modval); /* step 3: now that we have the new value of the generator, * recalculate the parameter values that are derived from the * generator */ fluid_voice_update_param(voice, gen); } } return FLUID_OK; } /** * Update all the modulators. This function is called after a * ALL_CTRL_OFF MIDI message has been received (CC 121). * */ int fluid_voice_modulate_all(fluid_voice_t* voice) { fluid_mod_t* mod; int i, k, gen; fluid_real_t modval; /* Loop through all the modulators. FIXME: we should loop through the set of generators instead of the set of modulators. We risk to call 'fluid_voice_update_param' several times for the same generator if several modulators have that generator as destination. It's not an error, just a wast of energy (think polution, global warming, unhappy musicians, ...) */ for (i = 0; i < voice->mod_count; i++) { mod = &voice->mod[i]; gen = fluid_mod_get_dest(mod); modval = 0.0; /* Accumulate the modulation values of all the modulators with * destination generator 'gen' */ for (k = 0; k < voice->mod_count; k++) { if (fluid_mod_has_dest(&voice->mod[k], gen)) { modval += fluid_mod_get_value(&voice->mod[k], voice->channel, voice); } } fluid_gen_set_mod(&voice->gen[gen], modval); /* Update the parameter values that are depend on the generator * 'gen' */ fluid_voice_update_param(voice, gen); } return FLUID_OK; } /* Force the voice into release stage. Useful anywhere a voice needs to be damped even if pedals (sustain sostenuto) are depressed. See fluid_synth_damp_voices_by_sustain_LOCAL(), fluid_synth_damp_voices_by_sostenuto_LOCAL, fluid_voice_noteoff(). */ void fluid_voice_release(fluid_voice_t* voice) { unsigned int at_tick = fluid_channel_get_min_note_length_ticks (voice->channel); UPDATE_RVOICE_I1(fluid_rvoice_noteoff, at_tick); voice->has_noteoff = 1; // voice is marked as noteoff occured } /* * fluid_voice_noteoff */ int fluid_voice_noteoff(fluid_voice_t* voice) { fluid_channel_t* channel; fluid_profile(FLUID_PROF_VOICE_NOTE, voice->ref); channel = voice->channel; /* Sustain a note under Sostenuto pedal */ if (fluid_channel_sostenuto(channel) && channel->sostenuto_orderid > voice->id) { // Sostenuto depressed after note voice->status = FLUID_VOICE_HELD_BY_SOSTENUTO; } /* Or sustain a note under Sustain pedal */ else if (fluid_channel_sustained(channel)) { voice->status = FLUID_VOICE_SUSTAINED; } /* Or force the voice to release stage */ else fluid_voice_release(voice); return FLUID_OK; } /* * fluid_voice_kill_excl * * Percussion sounds can be mutually exclusive: for example, a 'closed * hihat' sound will terminate an 'open hihat' sound ringing at the * same time. This behaviour is modeled using 'exclusive classes', * turning on a voice with an exclusive class other than 0 will kill * all other voices having that exclusive class within the same preset * or channel. fluid_voice_kill_excl gets called, when 'voice' is to * be killed for that reason. */ int fluid_voice_kill_excl(fluid_voice_t* voice){ unsigned int at_tick; if (!_PLAYING(voice)) { return FLUID_OK; } /* Turn off the exclusive class information for this voice, so that it doesn't get killed twice */ fluid_voice_gen_set(voice, GEN_EXCLUSIVECLASS, 0); /* Speed up the volume envelope */ /* The value was found through listening tests with hi-hat samples. */ fluid_voice_gen_set(voice, GEN_VOLENVRELEASE, -200); fluid_voice_update_param(voice, GEN_VOLENVRELEASE); /* Speed up the modulation envelope */ fluid_voice_gen_set(voice, GEN_MODENVRELEASE, -200); fluid_voice_update_param(voice, GEN_MODENVRELEASE); at_tick = fluid_channel_get_min_note_length_ticks (voice->channel); UPDATE_RVOICE_I1(fluid_rvoice_noteoff, at_tick); return FLUID_OK; } /* * Called by fluid_synth when the overflow rvoice can be reclaimed. */ void fluid_voice_overflow_rvoice_finished(fluid_voice_t* voice) { voice->can_access_overflow_rvoice = 1; fluid_sample_null_ptr(&voice->overflow_rvoice->dsp.sample); } /* * fluid_voice_off * * Purpose: * Turns off a voice, meaning that it is not processed * anymore by the DSP loop. */ int fluid_voice_off(fluid_voice_t* voice) { fluid_profile(FLUID_PROF_VOICE_RELEASE, voice->ref); voice->chan = NO_CHANNEL; UPDATE_RVOICE0(fluid_rvoice_voiceoff); if (voice->can_access_rvoice) fluid_sample_null_ptr(&voice->rvoice->dsp.sample); voice->status = FLUID_VOICE_OFF; voice->has_noteoff = 1; /* Decrement the reference count of the sample. */ fluid_sample_null_ptr(&voice->sample); /* Decrement voice count */ voice->channel->synth->active_voice_count--; return FLUID_OK; } /** * Adds a modulator to the voice. * @param voice Voice instance * @param mod Modulator info (copied) * @param mode Determines how to handle an existing identical modulator * #FLUID_VOICE_ADD to add (offset) the modulator amounts, * #FLUID_VOICE_OVERWRITE to replace the modulator, * #FLUID_VOICE_DEFAULT when adding a default modulator - no duplicate should * exist so don't check. */ void fluid_voice_add_mod(fluid_voice_t* voice, fluid_mod_t* mod, int mode) { int i; /* * Some soundfonts come with a huge number of non-standard * controllers, because they have been designed for one particular * sound card. Discard them, maybe print a warning. */ if (((mod->flags1 & FLUID_MOD_CC) == 0) && ((mod->src1 != 0) /* SF2.01 section 8.2.1: Constant value */ && (mod->src1 != 2) /* Note-on velocity */ && (mod->src1 != 3) /* Note-on key number */ && (mod->src1 != 10) /* Poly pressure */ && (mod->src1 != 13) /* Channel pressure */ && (mod->src1 != 14) /* Pitch wheel */ && (mod->src1 != 16))) { /* Pitch wheel sensitivity */ FLUID_LOG(FLUID_WARN, "Ignoring invalid controller, using non-CC source %i.", mod->src1); return; } if (mode == FLUID_VOICE_ADD) { /* if identical modulator exists, add them */ for (i = 0; i < voice->mod_count; i++) { if (fluid_mod_test_identity(&voice->mod[i], mod)) { // printf("Adding modulator...\n"); voice->mod[i].amount += mod->amount; return; } } } else if (mode == FLUID_VOICE_OVERWRITE) { /* if identical modulator exists, replace it (only the amount has to be changed) */ for (i = 0; i < voice->mod_count; i++) { if (fluid_mod_test_identity(&voice->mod[i], mod)) { // printf("Replacing modulator...amount is %f\n",mod->amount); voice->mod[i].amount = mod->amount; return; } } } /* Add a new modulator (No existing modulator to add / overwrite). Also, default modulators (FLUID_VOICE_DEFAULT) are added without checking, if the same modulator already exists. */ if (voice->mod_count < FLUID_NUM_MOD) { fluid_mod_clone(&voice->mod[voice->mod_count++], mod); } } /** * Get the unique ID of the noteon-event. * @param voice Voice instance * @return Note on unique ID * * A SoundFont loader may store the voice processes it has created for * real-time control during the operation of a voice (for example: parameter * changes in SoundFont editor). The synth uses a pool of voices, which are * 'recycled' and never deallocated. * * Before modifying an existing voice, check * - that its state is still 'playing' * - that the ID is still the same * * Otherwise the voice has finished playing. */ unsigned int fluid_voice_get_id(fluid_voice_t* voice) { return voice->id; } /** * Check if a voice is still playing. * @param voice Voice instance * @return TRUE if playing, FALSE otherwise */ int fluid_voice_is_playing(fluid_voice_t* voice) { return _PLAYING(voice); } /* * fluid_voice_get_lower_boundary_for_attenuation * * Purpose: * * A lower boundary for the attenuation (as in 'the minimum * attenuation of this voice, with volume pedals, modulators * etc. resulting in minimum attenuation, cannot fall below x cB) is * calculated. This has to be called during fluid_voice_init, after * all modulators have been run on the voice once. Also, * voice->attenuation has to be initialized. */ static fluid_real_t fluid_voice_get_lower_boundary_for_attenuation(fluid_voice_t* voice) { int i; fluid_mod_t* mod; fluid_real_t possible_att_reduction_cB=0; fluid_real_t lower_bound; for (i = 0; i < voice->mod_count; i++) { mod = &voice->mod[i]; /* Modulator has attenuation as target and can change over time? */ if ((mod->dest == GEN_ATTENUATION) && ((mod->flags1 & FLUID_MOD_CC) || (mod->flags2 & FLUID_MOD_CC))) { fluid_real_t current_val = fluid_mod_get_value(mod, voice->channel, voice); fluid_real_t v = fabs(mod->amount); if ((mod->src1 == FLUID_MOD_PITCHWHEEL) || (mod->flags1 & FLUID_MOD_BIPOLAR) || (mod->flags2 & FLUID_MOD_BIPOLAR) || (mod->amount < 0)) { /* Can this modulator produce a negative contribution? */ v *= -1.0; } else { /* No negative value possible. But still, the minimum contribution is 0. */ v = 0; } /* For example: * - current_val=100 * - min_val=-4000 * - possible_att_reduction_cB += 4100 */ if (current_val > v){ possible_att_reduction_cB += (current_val - v); } } } lower_bound = voice->attenuation-possible_att_reduction_cB; /* SF2.01 specs do not allow negative attenuation */ if (lower_bound < 0) { lower_bound = 0; } return lower_bound; } int fluid_voice_set_param(fluid_voice_t* voice, int gen, fluid_real_t nrpn_value, int abs) { voice->gen[gen].nrpn = nrpn_value; voice->gen[gen].flags = (abs)? GEN_ABS_NRPN : GEN_SET; fluid_voice_update_param(voice, gen); return FLUID_OK; } int fluid_voice_set_gain(fluid_voice_t* voice, fluid_real_t gain) { /* avoid division by zero*/ if (gain < 0.0000001){ gain = 0.0000001; } voice->synth_gain = gain; voice->amp_left = fluid_pan(voice->pan, 1) * gain / 32768.0f; voice->amp_right = fluid_pan(voice->pan, 0) * gain / 32768.0f; voice->amp_reverb = voice->reverb_send * gain / 32768.0f; voice->amp_chorus = voice->chorus_send * gain / 32768.0f; UPDATE_RVOICE_R1(fluid_rvoice_set_synth_gain, gain); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 0, voice->amp_left); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 1, voice->amp_right); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 2, voice->amp_reverb); UPDATE_RVOICE_BUFFERS2(fluid_rvoice_buffers_set_amp, 3, voice->amp_chorus); return FLUID_OK; } /* - Scan the loop * - determine the peak level * - Calculate, what factor will make the loop inaudible * - Store in sample */ /** * Calculate the peak volume of a sample for voice off optimization. * @param s Sample to optimize * @return #FLUID_OK on success, #FLUID_FAILED otherwise * * If the peak volume during the loop is known, then the voice can * be released earlier during the release phase. Otherwise, the * voice will operate (inaudibly), until the envelope is at the * nominal turnoff point. So it's a good idea to call * fluid_voice_optimize_sample() on each sample once. */ int fluid_voice_optimize_sample(fluid_sample_t* s) { signed short peak_max = 0; signed short peak_min = 0; signed short peak; fluid_real_t normalized_amplitude_during_loop; double result; int i; /* ignore ROM and other(?) invalid samples */ if (!s->valid) return (FLUID_OK); if (!s->amplitude_that_reaches_noise_floor_is_valid){ /* Only once */ /* Scan the loop */ for (i = (int)s->loopstart; i < (int) s->loopend; i ++){ signed short val = s->data[i]; if (val > peak_max) { peak_max = val; } else if (val < peak_min) { peak_min = val; } } /* Determine the peak level */ if (peak_max >- peak_min){ peak = peak_max; } else { peak =- peak_min; }; if (peak == 0){ /* Avoid division by zero */ peak = 1; }; /* Calculate what factor will make the loop inaudible * For example: Take a peak of 3277 (10 % of 32768). The * normalized amplitude is 0.1 (10 % of 32768). An amplitude * factor of 0.0001 (as opposed to the default 0.00001) will * drop this sample to the noise floor. */ /* 16 bits => 96+4=100 dB dynamic range => 0.00001 */ normalized_amplitude_during_loop = ((fluid_real_t)peak)/32768.; result = FLUID_NOISE_FLOOR / normalized_amplitude_during_loop; /* Store in sample */ s->amplitude_that_reaches_noise_floor = (double)result; s->amplitude_that_reaches_noise_floor_is_valid = 1; #if 0 printf("Sample peak detection: factor %f\n", (double)result); #endif }; return FLUID_OK; } fluid_real_t fluid_voice_get_overflow_prio(fluid_voice_t* voice, fluid_overflow_prio_t* score, unsigned int cur_time) { fluid_real_t this_voice_prio = 0; /* Are we already overflowing? */ if (!voice->can_access_overflow_rvoice) { return OVERFLOW_PRIO_CANNOT_KILL; } /* Is this voice on the drum channel? * Then it is very important. * Also skip the released and sustained scores. */ if (voice->channel->channel_type == CHANNEL_TYPE_DRUM){ this_voice_prio += score->percussion; } else if (voice->has_noteoff) { /* Noteoff has */ this_voice_prio += score->released; } else if (_SUSTAINED(voice) || _HELD_BY_SOSTENUTO(voice)) { /* This voice is still active, since the sustain pedal is held down. * Consider it less important than non-sustained channels. * This decision is somehow subjective. But usually the sustain pedal * is used to play 'more-voices-than-fingers', so it shouldn't hurt * if we kill one voice. */ this_voice_prio += score->sustained; } /* We are not enthusiastic about releasing voices, which have just been started. * Otherwise hitting a chord may result in killing notes belonging to that very same * chord. So give newer voices a higher score. */ if (score->age) { cur_time -= voice->start_time; if (cur_time < 1) cur_time = 1; // Avoid div by zero this_voice_prio += (score->age * voice->output_rate) / cur_time; } /* take a rough estimate of loudness into account. Louder voices are more important. */ if (score->volume) { fluid_real_t a = voice->attenuation; if (voice->has_noteoff) { // FIXME: Should take into account where on the envelope we are...? } if (a < 0.1) a = 0.1; // Avoid div by zero this_voice_prio += score->volume / a; } return this_voice_prio; }