333 lines
15 KiB
JavaScript
333 lines
15 KiB
JavaScript
(function () {
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'use strict';
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const activeOscillators = {};
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let __gainNode = null;
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const getCtx = () => {
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if (typeof getAudioContext === 'function') {
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const ctx = getAudioContext();
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if (!__gainNode) {
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__gainNode = ctx.createGain();
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__gainNode.gain.value = 0.3;
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__gainNode.connect(ctx.destination);
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}
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return ctx;
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}
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if (!window.__sharedAudioCtx) {
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window.__sharedAudioCtx = new (window.AudioContext || window.webkitAudioContext)();
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}
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if (window.__sharedAudioCtx.state === 'suspended') {
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window.__sharedAudioCtx.resume();
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}
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if (!__gainNode) {
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__gainNode = window.__sharedAudioCtx.createGain();
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__gainNode.gain.value = 0.3;
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__gainNode.connect(window.__sharedAudioCtx.destination);
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}
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return window.__sharedAudioCtx;
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};
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const _channels = Array.from({ length: 16 }, () => ({ bank: 0, program: 0, isPercussion: false }));
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let _nextMelodicChannel = 0;
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let _synthInstance = null;
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let _initialized = false;
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let _initPromise = null;
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let _currentSfId = null;
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const _scheduledNotes = [];
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const SonicSF = {
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loadedFonts: {},
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init: async function (audioContext) {
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if (_initialized && _synthInstance) return;
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if (_initPromise) return _initPromise;
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_initPromise = (async () => {
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if (!window.SpessaSynthClass || !window.__SpessaSynthCDN) {
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console.warn("[SonicSF] SpessaSynth CDN not available. Retrying on next select.");
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_initPromise = null;
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return;
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}
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try {
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if (audioContext.state === 'suspended') await audioContext.resume();
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const procUrl = window.__SpessaSynthCDN + "spessasynth_processor.min.js";
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await audioContext.audioWorklet.addModule(procUrl);
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_synthInstance = new window.SpessaSynthClass(audioContext);
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_synthInstance.connect(audioContext.destination);
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await _synthInstance.isReady;
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_initialized = true;
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} catch (e) {
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console.warn("[SonicSF] SpessaSynth init failed:", e);
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_initPromise = null;
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}
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})();
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return _initPromise;
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},
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loadSoundFont: async function (sfId) {
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if (!_initialized || !_synthInstance) return false;
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if (_currentSfId === sfId) return true;
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// Check if already loaded (SpessaSynth can hold multiple banks)
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const already = _synthInstance.soundBankManager?.soundBankList?.some(b => b.id === sfId);
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if (already) {
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_currentSfId = sfId;
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return true;
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}
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try {
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const cache = window.SonicSFStorage;
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let buf = cache ? await cache.getBuffer(sfId) : null;
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if (!buf) {
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const url = "/api/v1/plugins/soundfonts/download/" + encodeURIComponent(sfId) + "?t=" + Date.now();
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const resp = await fetch(url);
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if (!resp.ok) {
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console.warn("[SonicSF] SoundFont not found on server:", sfId);
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return false;
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}
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buf = await resp.arrayBuffer();
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if (cache) await cache.saveBuffer(sfId, buf);
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}
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await _synthInstance.soundBankManager.addSoundBank(buf.slice(0), sfId);
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await _synthInstance.isReady;
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_currentSfId = sfId;
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return true;
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} catch (e) {
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console.warn("[SonicSF] loadSoundFont failed:", e);
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return false;
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}
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},
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selectInstrument: async function (channel, bank, program, sfId) {
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if (!_initialized || !_synthInstance) {
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const ctx = new (window.AudioContext || window.webkitAudioContext)();
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await this.init(ctx);
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}
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if (sfId) {
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const ok = await this.loadSoundFont(sfId);
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if (!ok) return;
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}
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try { _synthInstance.controllerChange(channel, 0, bank); } catch (e) {}
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try { _synthInstance.controllerChange(channel, 32, 0); } catch (e) {}
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try { _synthInstance.programChange(channel, program); } catch (e) {}
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this.controllerChange(channel, 0, bank);
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this.programChange(channel, program);
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},
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controllerChange: function (channel, controller, value) {
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if (channel < 0 || channel > 15) return;
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if (_initialized && _synthInstance) {
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try { _synthInstance.controllerChange(channel, controller, value); } catch (e) {}
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}
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if (controller === 0) {
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_channels[channel].bank = value;
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_channels[channel].isPercussion = (value === 128);
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}
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},
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programChange: function (channel, program) {
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if (channel < 0 || channel > 15) return;
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if (_initialized && _synthInstance) {
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try { _synthInstance.programChange(channel, program); } catch (e) {}
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}
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_channels[channel].program = program;
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},
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allocateChannel: function (bank) {
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if (bank === 128) return 9;
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const ch = _nextMelodicChannel % 9;
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_nextMelodicChannel = (_nextMelodicChannel + 1) % 9;
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return ch;
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},
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applyAITrackInstrument: function (bank, program, synthEngine) {
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if (synthEngine) {
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bank = bank !== undefined ? bank : (synthEngine.soundfont_bank || 0);
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program = program !== undefined ? program : (synthEngine.soundfont_program || 0);
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}
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const channel = this.allocateChannel(bank);
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this.selectInstrument(channel, bank, program, synthEngine?.soundfont_id);
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return channel;
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},
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getChannelState: function (channel) {
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if (channel < 0 || channel > 15) return null;
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return { ..._channels[channel] };
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},
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pitchBend: function (channel, value) {
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if (channel < 0 || channel > 15) return;
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if (_initialized && _synthInstance) {
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try { _synthInstance.pitchBend(channel, value); } catch (e) {}
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}
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},
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stopNote: function (channel, pitch) {
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if (channel < 0 || channel > 15) return;
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if (_initialized && _synthInstance) {
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try { _synthInstance.noteOff(channel, pitch); } catch (e) {}
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try { _synthInstance.controllerChange(channel, 64, 0); } catch (e) {}
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// Also send noteOff with velocity=0 for safety
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try { _synthInstance.noteOff(channel, pitch, 0); } catch (e) {}
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}
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},
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playNote: function (note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine) {
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if (_initialized && _synthInstance) {
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this._playNoteSpessa(note, velocity, durationMs, startTime, program, channel, synthEngine);
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return;
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}
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this._playNoteOsc(note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine);
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},
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_playNoteSpessa: function (note, velocity, durationMs, startTime, program, channel, synthEngine) {
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const ctx = getCtx();
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const midiPitch = Math.min(127, Math.max(0, parseInt(note) || 60));
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const midiVel = Math.min(127, Math.max(1, Math.floor(
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typeof velocity === 'number' ? (velocity > 1 ? velocity : velocity * 127) : 100
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)));
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if (synthEngine) {
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const ch = channel !== undefined ? channel : (synthEngine.soundfont_bank === 128 ? 9 : 0);
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try { _synthInstance.controllerChange(ch, 0, synthEngine.soundfont_bank || 0); } catch (e) {}
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try { _synthInstance.controllerChange(ch, 32, 0); } catch (e) {}
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try { _synthInstance.programChange(ch, synthEngine.soundfont_program || 0); } catch (e) {}
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if (channel === undefined) channel = ch;
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}
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if (channel === undefined) channel = 0;
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const durSec = durationMs / 1000;
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const now = ctx.currentTime;
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const delay = (typeof startTime === 'number' && startTime > now) ? (startTime - now) : 0;
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const noteId = { on: null, off: null };
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const doNote = () => {
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try {
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_synthInstance.noteOn(channel, midiPitch, midiVel);
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// Scheduled notes (timeline playback): auto noteOff after duration
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// Immediate notes (MIDI keyboard): keep sounding until stopNote/stopAll
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if (delay > 0) {
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noteId.off = setTimeout(() => {
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try { _synthInstance.noteOff(channel, midiPitch); } catch (e) {}
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}, durSec * 1000);
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}
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} catch (e) {
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console.warn("[SonicSF] SpessaSynth noteOn error:", e);
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this._playNoteOsc(note, velocity, durationMs, startTime, program, null, channel, synthEngine);
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}
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};
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if (delay > 0) {
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noteId.on = setTimeout(doNote, delay * 1000);
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_scheduledNotes.push(noteId);
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} else {
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doNote();
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}
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},
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_playNoteOsc: function (note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine) {
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const ctx = getCtx();
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const freq = 440 * Math.pow(2, (note - 69) / 12);
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if (freq <= 0 || isNaN(freq)) return null;
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if (synthEngine) {
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const ch = channel !== undefined ? channel : (synthEngine.soundfont_bank === 128 ? 9 : 0);
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this.controllerChange(ch, 0, synthEngine.soundfont_bank || 0);
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this.programChange(ch, synthEngine.soundfont_program || 0);
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if (channel === undefined) channel = ch;
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if (program === undefined) program = synthEngine.soundfont_program;
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}
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const osc = ctx.createOscillator();
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const noteGain = ctx.createGain();
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let oscType = 'triangle';
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let attackTime = 0.03, decayTime = 0.1, sustainLevel = 0.5, releaseTime = 0.2, volFactor = 0.25;
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let prog = program !== undefined ? parseInt(program) : 0;
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if (channel !== undefined && channel >= 0 && channel < 16) {
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const chState = _channels[channel];
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prog = chState.program || prog;
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}
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if (prog >= 0 && prog <= 7) {
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oscType = 'sine'; decayTime = 0.3; sustainLevel = 0.1; releaseTime = 0.2;
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} else if (prog >= 8 && prog <= 15) {
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oscType = 'sine'; decayTime = 0.1; sustainLevel = 0.0; releaseTime = 0.1;
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} else if (prog >= 16 && prog <= 23) {
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oscType = 'sine'; attackTime = 0.05; sustainLevel = 0.8; releaseTime = 0.1;
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} else if (prog >= 24 && prog <= 31) {
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oscType = 'triangle'; decayTime = 0.4; sustainLevel = 0.2; releaseTime = 0.3;
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} else if (prog >= 32 && prog <= 39) {
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oscType = 'triangle'; attackTime = 0.02; decayTime = 0.2; sustainLevel = 0.6; releaseTime = 0.2;
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} else if (prog >= 40 && prog <= 47) {
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oscType = 'sawtooth'; attackTime = 0.15; sustainLevel = 0.8; releaseTime = 0.5; volFactor = 0.15;
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} else if (prog >= 48 && prog <= 55) {
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oscType = 'sawtooth'; attackTime = 0.2; sustainLevel = 0.8; releaseTime = 0.6; volFactor = 0.12;
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} else if (prog >= 56 && prog <= 63) {
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oscType = 'sawtooth'; attackTime = 0.08; sustainLevel = 0.7; releaseTime = 0.3; volFactor = 0.15;
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} else if (prog >= 64 && prog <= 71) {
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oscType = 'square'; attackTime = 0.05; sustainLevel = 0.6; releaseTime = 0.2; volFactor = 0.15;
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} else if (prog >= 72 && prog <= 79) {
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oscType = 'sine'; attackTime = 0.1; sustainLevel = 0.7; releaseTime = 0.3; volFactor = 0.2;
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} else if (prog >= 80 && prog <= 119) {
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oscType = 'sawtooth'; attackTime = 0.05; sustainLevel = 0.6; releaseTime = 0.4; volFactor = 0.15;
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}
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osc.type = oscType;
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osc.frequency.setValueAtTime(freq, 0);
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const startAt = startTime !== undefined ? startTime : ctx.currentTime;
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const durSec = durationMs / 1000;
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const vel = typeof velocity === 'number' ? (velocity > 1 ? velocity / 127 : velocity) : 0.8;
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const targetGain = vel * volFactor;
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noteGain.gain.setValueAtTime(0, startAt);
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noteGain.gain.linearRampToValueAtTime(targetGain, startAt + attackTime);
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noteGain.gain.linearRampToValueAtTime(targetGain * sustainLevel, startAt + attackTime + decayTime);
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const releaseStart = startAt + Math.max(attackTime + decayTime, durSec);
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noteGain.gain.linearRampToValueAtTime(targetGain * sustainLevel, releaseStart);
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noteGain.gain.linearRampToValueAtTime(0, releaseStart + releaseTime);
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osc.connect(noteGain);
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noteGain.connect(destinationNode || __gainNode || ctx.destination);
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osc.start(startAt);
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const stopAt = releaseStart + releaseTime + 0.02;
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osc.stop(stopAt);
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const oscId = `${note}_${Date.now()}_${Math.random()}`;
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activeOscillators[oscId] = { osc, gain: noteGain };
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setTimeout(() => { delete activeOscillators[oscId]; }, (stopAt - ctx.currentTime) * 1000 + 100);
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return osc;
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},
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stopAll: function () {
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if (_initialized && _synthInstance) {
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try { for (let ch = 0; ch < 16; ch++) _synthInstance.allNotesOff(ch); } catch (e) {}
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}
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// Cancel all scheduled future notes
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while (_scheduledNotes.length > 0) {
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const n = _scheduledNotes.pop();
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if (n.on) { clearTimeout(n.on); n.on = null; }
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if (n.off) { clearTimeout(n.off); n.off = null; }
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}
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const ctx = getCtx();
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const now = ctx.currentTime;
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Object.values(activeOscillators).forEach(entry => {
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try {
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if (entry.gain) { entry.gain.gain.cancelScheduledValues(now); entry.gain.gain.setValueAtTime(0, now); }
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if (entry.osc) try { entry.osc.stop(now); } catch (e) { }
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} catch (e) { }
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});
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Object.keys(activeOscillators).forEach(k => delete activeOscillators[k]);
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},
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saveToIndexedDB: async function (name, arrayBuffer) {
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if (window.SonicStorage && window.SonicStorage.saveToIndexedDB) {
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await window.SonicStorage.saveToIndexedDB('soundfont_' + name, arrayBuffer);
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}
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},
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loadFromIndexedDB: async function (name) {
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if (window.SonicStorage && window.SonicStorage.loadFromIndexedDB) {
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return await window.SonicStorage.loadFromIndexedDB('soundfont_' + name);
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}
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return null;
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}
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};
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window.SonicSF = SonicSF;
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})();
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