561 lines
15 KiB
C
561 lines
15 KiB
C
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/* a-fluidsynth -- simple & robust x-platform fluidsynth LV2
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*
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* Copyright (C) 2016 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#define AFS_URN "urn:ardour:a-fluidsynth"
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#ifdef HAVE_LV2_1_10_0
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#define x_forge_object lv2_atom_forge_object
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#else
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#define x_forge_object lv2_atom_forge_blank
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#endif
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#include "fluidsynth.h"
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#include <lv2/lv2plug.in/ns/lv2core/lv2.h>
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#include <lv2/lv2plug.in/ns/ext/atom/atom.h>
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#include <lv2/lv2plug.in/ns/ext/atom/forge.h>
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#include <lv2/lv2plug.in/ns/ext/atom/util.h>
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#include <lv2/lv2plug.in/ns/ext/log/logger.h>
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#include <lv2/lv2plug.in/ns/ext/midi/midi.h>
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#include <lv2/lv2plug.in/ns/ext/patch/patch.h>
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#include <lv2/lv2plug.in/ns/ext/state/state.h>
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#include <lv2/lv2plug.in/ns/ext/urid/urid.h>
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#include <lv2/lv2plug.in/ns/ext/worker/worker.h>
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enum {
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FS_PORT_CONTROL = 0,
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FS_PORT_NOTIFY,
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FS_PORT_OUT_L,
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FS_PORT_OUT_R
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};
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enum {
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CMD_APPLY = 0,
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CMD_FREE = 1,
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};
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typedef struct {
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/* ports */
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const LV2_Atom_Sequence* control;
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LV2_Atom_Sequence* notify;
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float* output[2];
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/* fluid synth */
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fluid_settings_t* settings;
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fluid_synth_t* synth;
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int synthId;
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/* lv2 URIDs */
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LV2_URID atom_Blank;
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LV2_URID atom_Object;
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LV2_URID atom_URID;
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LV2_URID atom_Path;
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LV2_URID midi_MidiEvent;
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LV2_URID patch_Get;
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LV2_URID patch_Set;
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LV2_URID patch_property;
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LV2_URID patch_value;
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LV2_URID afs_sf2file;
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/* lv2 extensions */
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LV2_Log_Log* log;
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LV2_Log_Logger logger;
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LV2_Worker_Schedule* schedule;
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LV2_Atom_Forge forge;
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LV2_Atom_Forge_Frame frame;
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/* state */
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bool panic;
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bool initialized;
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bool inform_ui;
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char current_sf2_file_path[1024];
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char queue_sf2_file_path[1024];
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bool reinit_in_progress; // set in run, cleared in work_response
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bool queue_reinit; // set in restore, cleared in work_response
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fluid_midi_event_t* fmidi_event;
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} AFluidSynth;
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/* *****************************************************************************
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* helpers
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*/
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static bool
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load_sf2 (AFluidSynth* self, const char* fn)
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{
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const int synth_id = fluid_synth_sfload (self->synth, fn, 1);
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if (synth_id == FLUID_FAILED) {
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return false;
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}
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fluid_sfont_t* const sfont = fluid_synth_get_sfont_by_id (self->synth, synth_id);
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if (!sfont) {
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return false;
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}
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int chn;
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fluid_preset_t preset;
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sfont->iteration_start (sfont);
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for (chn = 0; sfont->iteration_next (sfont, &preset) && chn < 15; ++chn) {
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fluid_synth_program_select (self->synth, chn, synth_id,
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preset.get_banknum (&preset), preset.get_num (&preset));
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}
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if (chn == 0) {
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return false;
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}
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return true;
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}
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static const LV2_Atom*
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parse_patch_msg (AFluidSynth* self, const LV2_Atom_Object* obj)
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{
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const LV2_Atom* property = NULL;
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const LV2_Atom* file_path = NULL;
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if (obj->body.otype != self->patch_Set) {
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return NULL;
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}
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lv2_atom_object_get (obj, self->patch_property, &property, 0);
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if (!property || property->type != self->atom_URID) {
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return NULL;
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} else if (((const LV2_Atom_URID*)property)->body != self->afs_sf2file) {
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return NULL;
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}
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lv2_atom_object_get(obj, self->patch_value, &file_path, 0);
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if (!file_path || file_path->type != self->atom_Path) {
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return NULL;
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}
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return file_path;
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}
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static void
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inform_ui (AFluidSynth* self)
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{
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if (strlen (self->current_sf2_file_path) == 0) {
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return;
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}
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LV2_Atom_Forge_Frame frame;
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lv2_atom_forge_frame_time (&self->forge, 0);
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x_forge_object(&self->forge, &frame, 1, self->patch_Set);
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lv2_atom_forge_property_head (&self->forge, self->patch_property, 0);
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lv2_atom_forge_urid (&self->forge, self->afs_sf2file);
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lv2_atom_forge_property_head (&self->forge, self->patch_value, 0);
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lv2_atom_forge_path( &self->forge, self->current_sf2_file_path, strlen(self->current_sf2_file_path));
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lv2_atom_forge_pop (&self->forge, &frame);
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}
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/* *****************************************************************************
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* LV2 Plugin
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*/
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static LV2_Handle
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instantiate (const LV2_Descriptor* descriptor,
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double rate,
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const char* bundle_path,
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const LV2_Feature* const* features)
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{
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AFluidSynth* self = (AFluidSynth*)calloc (1, sizeof (AFluidSynth));
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if (!self) {
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return NULL;
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}
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LV2_URID_Map* map = NULL;
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for (int i=0; features[i] != NULL; ++i) {
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if (!strcmp (features[i]->URI, LV2_URID__map)) {
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map = (LV2_URID_Map*)features[i]->data;
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} else if (!strcmp (features[i]->URI, LV2_LOG__log)) {
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self->log = (LV2_Log_Log*)features[i]->data;
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} else if (!strcmp (features[i]->URI, LV2_WORKER__schedule)) {
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self->schedule = (LV2_Worker_Schedule*)features[i]->data;
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}
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}
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lv2_log_logger_init (&self->logger, map, self->log);
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if (!map) {
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lv2_log_error (&self->logger, "a-fluidsynth.lv2: Host does not support urid:map\n");
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free (self);
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return NULL;
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}
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if (!self->schedule) {
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lv2_log_error (&self->logger, "a-fluidsynth.lv2: Host does not support worker:schedule\n");
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free (self);
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return NULL;
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}
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/* initialize fluid synth */
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self->settings = new_fluid_settings ();
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if (!self->settings) {
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lv2_log_error (&self->logger, "a-fluidsynth.lv2: cannot allocate Fluid Settings\n");
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free (self);
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return NULL;
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}
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fluid_settings_setnum (self->settings, "synth.sample-rate", rate);
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fluid_settings_setint (self->settings, "synth.parallel-render", 1);
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fluid_settings_setint (self->settings, "synth.threadsafe-api", 0);
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self->synth = new_fluid_synth (self->settings);
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if (!self->synth) {
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lv2_log_error (&self->logger, "a-fluidsynth.lv2: cannot allocate Fluid Synth\n");
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delete_fluid_settings (self->settings);
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free (self);
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return NULL;
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}
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fluid_synth_set_gain (self->synth, 1.0f);
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fluid_synth_set_polyphony (self->synth, 32);
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fluid_synth_set_sample_rate (self->synth, (float)rate);
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self->fmidi_event = new_fluid_midi_event ();
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if (!self->fmidi_event) {
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lv2_log_error (&self->logger, "a-fluidsynth.lv2: cannot allocate Fluid Event\n");
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delete_fluid_synth (self->synth);
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delete_fluid_settings (self->settings);
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free (self);
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return NULL;
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}
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/* initialize plugin state */
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self->panic = true;
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self->inform_ui = false;
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self->initialized = false;
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self->reinit_in_progress = false;
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self->queue_reinit = false;
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lv2_atom_forge_init (&self->forge, map);
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/* map URIDs */
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self->atom_Blank = map->map (map->handle, LV2_ATOM__Blank);
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self->atom_Object = map->map (map->handle, LV2_ATOM__Object);
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self->atom_Path = map->map (map->handle, LV2_ATOM__Path);
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self->atom_URID = map->map (map->handle, LV2_ATOM__URID);
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self->midi_MidiEvent = map->map (map->handle, LV2_MIDI__MidiEvent);
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self->patch_Get = map->map (map->handle, LV2_PATCH__Get);
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self->patch_Set = map->map (map->handle, LV2_PATCH__Set);
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self->patch_property = map->map (map->handle, LV2_PATCH__property);
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self->patch_value = map->map (map->handle, LV2_PATCH__value);
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self->afs_sf2file = map->map (map->handle, AFS_URN ":sf2file");
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return (LV2_Handle)self;
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}
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static void
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connect_port (LV2_Handle instance,
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uint32_t port,
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void* data)
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{
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AFluidSynth* self = (AFluidSynth*)instance;
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switch (port) {
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case FS_PORT_CONTROL:
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self->control = (const LV2_Atom_Sequence*)data;
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break;
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case FS_PORT_NOTIFY:
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self->notify = (LV2_Atom_Sequence*)data;
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break;
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case FS_PORT_OUT_L:
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self->output[0] = (float*)data;
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break;
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case FS_PORT_OUT_R:
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self->output[1] = (float*)data;
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break;
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}
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}
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static void
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activate (LV2_Handle instance)
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{
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AFluidSynth* self = (AFluidSynth*)instance;
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self->panic = true;
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}
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static void
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run (LV2_Handle instance, uint32_t n_samples)
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{
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AFluidSynth* self = (AFluidSynth*)instance;
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if (!self->control || !self->notify) {
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return;
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}
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const uint32_t capacity = self->notify->atom.size;
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lv2_atom_forge_set_buffer (&self->forge, (uint8_t*)self->notify, capacity);
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lv2_atom_forge_sequence_head (&self->forge, &self->frame, 0);
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if (!self->initialized || self->reinit_in_progress) {
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memset (self->output[0], 0, n_samples * sizeof (float));
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memset (self->output[1], 0, n_samples * sizeof (float));
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} else if (self->panic) {
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fluid_synth_all_notes_off (self->synth, -1);
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fluid_synth_all_sounds_off (self->synth, -1);
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self->panic = false;
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}
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uint32_t offset = 0;
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LV2_ATOM_SEQUENCE_FOREACH (self->control, ev) {
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const LV2_Atom_Object* obj = (LV2_Atom_Object*)&ev->body;
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if (ev->body.type == self->atom_Blank || ev->body.type == self->atom_Object) {
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if (obj->body.otype == self->patch_Get) {
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self->inform_ui = false;
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inform_ui (self);
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}
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else if (obj->body.otype == self->patch_Set) {
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const LV2_Atom* file_path = parse_patch_msg (self, obj);
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if (file_path && !self->reinit_in_progress && !self->queue_reinit) {
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const char *fn = (const char*)(file_path+1);
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strncpy (self->queue_sf2_file_path, fn, 1023);
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self->queue_sf2_file_path[1023] = '\0';
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self->reinit_in_progress = true;
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int magic = 0x4711;
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self->schedule->schedule_work (self->schedule->handle, sizeof(int), &magic);
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}
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}
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}
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else if (ev->body.type == self->midi_MidiEvent && self->initialized && !self->reinit_in_progress) {
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if (ev->body.size > 3 || ev->time.frames >= n_samples) {
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continue;
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}
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if (ev->time.frames > offset) {
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fluid_synth_write_float (
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self->synth,
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ev->time.frames - offset,
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&self->output[0][offset], 0, 1,
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&self->output[1][offset], 0, 1);
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}
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offset = ev->time.frames;
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const uint8_t* const data = (const uint8_t*)(ev + 1);
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fluid_midi_event_set_type (self->fmidi_event, data[0] & 0xf0);
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fluid_midi_event_set_channel (self->fmidi_event, data[0] & 0x0f);
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if (ev->body.size > 1) {
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fluid_midi_event_set_key (self->fmidi_event, data[1]);
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}
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if (ev->body.size > 2) {
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fluid_midi_event_set_value (self->fmidi_event, data[2]);
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}
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fluid_synth_handle_midi_event (self->synth, self->fmidi_event);
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}
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}
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if (self->queue_reinit && !self->reinit_in_progress) {
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self->reinit_in_progress = true;
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int magic = 0x4711;
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self->schedule->schedule_work (self->schedule->handle, sizeof(int), &magic);
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}
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/* inform the GUI */
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if (self->inform_ui) {
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self->inform_ui = false;
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inform_ui (self);
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}
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if (n_samples > offset && self->initialized && !self->reinit_in_progress) {
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fluid_synth_write_float (
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self->synth,
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n_samples - offset,
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&self->output[0][offset], 0, 1,
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&self->output[1][offset], 0, 1);
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}
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}
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static void cleanup (LV2_Handle instance)
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{
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AFluidSynth* self = (AFluidSynth*)instance;
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delete_fluid_synth (self->synth);
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delete_fluid_settings (self->settings);
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delete_fluid_midi_event (self->fmidi_event);
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free (self);
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}
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/* *****************************************************************************
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* LV2 Extensions
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*/
|
||
|
|
||
|
static LV2_Worker_Status
|
||
|
work (LV2_Handle instance,
|
||
|
LV2_Worker_Respond_Function respond,
|
||
|
LV2_Worker_Respond_Handle handle,
|
||
|
uint32_t size,
|
||
|
const void* data)
|
||
|
{
|
||
|
AFluidSynth* self = (AFluidSynth*)instance;
|
||
|
|
||
|
if (size != sizeof(int)) {
|
||
|
return LV2_WORKER_ERR_UNKNOWN;
|
||
|
}
|
||
|
int magic = *((const int*)data);
|
||
|
if (magic != 0x4711) {
|
||
|
return LV2_WORKER_ERR_UNKNOWN;
|
||
|
}
|
||
|
|
||
|
self->initialized = load_sf2 (self, self->queue_sf2_file_path);
|
||
|
respond (handle, 1, "");
|
||
|
return LV2_WORKER_SUCCESS;
|
||
|
}
|
||
|
|
||
|
static LV2_Worker_Status
|
||
|
work_response (LV2_Handle instance,
|
||
|
uint32_t size,
|
||
|
const void* data)
|
||
|
{
|
||
|
AFluidSynth* self = (AFluidSynth*)instance;
|
||
|
self->reinit_in_progress = false;
|
||
|
self->queue_reinit = false;
|
||
|
self->inform_ui = true;
|
||
|
self->panic = true;
|
||
|
|
||
|
if (self->initialized) {
|
||
|
strcpy (self->current_sf2_file_path, self->queue_sf2_file_path);
|
||
|
} else {
|
||
|
self->current_sf2_file_path[0] = 0;
|
||
|
}
|
||
|
return LV2_WORKER_SUCCESS;
|
||
|
}
|
||
|
|
||
|
static LV2_State_Status
|
||
|
save (LV2_Handle instance,
|
||
|
LV2_State_Store_Function store,
|
||
|
LV2_State_Handle handle,
|
||
|
uint32_t flags,
|
||
|
const LV2_Feature* const* features)
|
||
|
{
|
||
|
AFluidSynth* self = (AFluidSynth*)instance;
|
||
|
|
||
|
if (strlen (self->current_sf2_file_path) == 0) {
|
||
|
return LV2_STATE_ERR_NO_PROPERTY;
|
||
|
}
|
||
|
|
||
|
LV2_State_Map_Path* map_path = NULL;
|
||
|
|
||
|
for (int i = 0; features[i]; ++i) {
|
||
|
if (!strcmp (features[i]->URI, LV2_STATE__mapPath)) {
|
||
|
map_path = (LV2_State_Map_Path*) features[i]->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!map_path) {
|
||
|
return LV2_STATE_ERR_NO_FEATURE;
|
||
|
}
|
||
|
|
||
|
char* apath = map_path->abstract_path (map_path->handle, self->current_sf2_file_path);
|
||
|
store (handle, self->afs_sf2file,
|
||
|
apath, strlen (apath) + 1,
|
||
|
self->atom_Path,
|
||
|
LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE);
|
||
|
|
||
|
return LV2_STATE_SUCCESS;
|
||
|
}
|
||
|
|
||
|
static LV2_State_Status
|
||
|
restore (LV2_Handle instance,
|
||
|
LV2_State_Retrieve_Function retrieve,
|
||
|
LV2_State_Handle handle,
|
||
|
uint32_t flags,
|
||
|
const LV2_Feature* const* features)
|
||
|
{
|
||
|
AFluidSynth* self = (AFluidSynth*)instance;
|
||
|
if (self->reinit_in_progress || self->queue_reinit) {
|
||
|
lv2_log_warning (&self->logger, "a-fluidsynth.lv2: sf2 load already queued.\n");
|
||
|
return LV2_STATE_ERR_UNKNOWN;
|
||
|
}
|
||
|
|
||
|
size_t size;
|
||
|
uint32_t type;
|
||
|
uint32_t valflags;
|
||
|
|
||
|
const void* value = retrieve (handle, self->afs_sf2file, &size, &type, &valflags);
|
||
|
if (value) {
|
||
|
strncpy (self->queue_sf2_file_path, value, 1023);
|
||
|
self->queue_sf2_file_path[1023] = '\0';
|
||
|
self->queue_reinit = true;
|
||
|
}
|
||
|
return LV2_STATE_SUCCESS;
|
||
|
}
|
||
|
|
||
|
static const void*
|
||
|
extension_data (const char* uri)
|
||
|
{
|
||
|
static const LV2_Worker_Interface worker = { work, work_response, NULL };
|
||
|
static const LV2_State_Interface state = { save, restore };
|
||
|
if (!strcmp (uri, LV2_WORKER__interface)) {
|
||
|
return &worker;
|
||
|
}
|
||
|
else if (!strcmp (uri, LV2_STATE__interface)) {
|
||
|
return &state;
|
||
|
}
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static const LV2_Descriptor descriptor = {
|
||
|
AFS_URN,
|
||
|
instantiate,
|
||
|
connect_port,
|
||
|
activate,
|
||
|
run,
|
||
|
NULL,
|
||
|
cleanup,
|
||
|
extension_data
|
||
|
};
|
||
|
|
||
|
#undef LV2_SYMBOL_EXPORT
|
||
|
#ifdef _WIN32
|
||
|
# define LV2_SYMBOL_EXPORT __declspec(dllexport)
|
||
|
#else
|
||
|
# define LV2_SYMBOL_EXPORT __attribute__ ((visibility ("default")))
|
||
|
#endif
|
||
|
LV2_SYMBOL_EXPORT
|
||
|
const LV2_Descriptor*
|
||
|
lv2_descriptor (uint32_t index)
|
||
|
{
|
||
|
switch (index) {
|
||
|
case 0:
|
||
|
return &descriptor;
|
||
|
default:
|
||
|
return NULL;
|
||
|
}
|
||
|
}
|