locpham
c3368d0a91
- native_bridge/: InstrumentEngineManager multi-channel, sample-accurate, CC/program/pitchbend, transport, Vst3Instrument stub (HAVE_VST3SDK) - src-tauri: shm.rs, bridge spawn + audio pump + health monitor, open_vst_gui, externalBin, commands - app: UnifiedMidiRouter, NativeBridgeService, bridgeAudioNode, audioRoutingEngine, Plugin Manager UI, Bridge/WASM indicator, set_position sync - build: 3 ps1 (force-added, build/ ignored), verify_bundle --check-bridge, CI workflow - docs: TASKS.md, TEST_NOTES.md (Windows verify checklist), install/report updates
73 lines
2.3 KiB
JavaScript
73 lines
2.3 KiB
JavaScript
// app/static/js/services/bridgeAudioNode.js
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// Audio sink: consumes 'bridge-audio' PCM frames (native bridge) and plays them
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// through a ScriptProcessorNode into the WebAudio graph (track FX / master bus).
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(function () {
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var RING_DEPTH = 8; // 8 blocks * 256 samples ~= 46ms anti-underrun
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var SP_BUFFER = 4096; // ScriptProcessor chunk (16 bridge blocks)
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var _queue = [];
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var _spn = null;
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var _gainNode = null;
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var _ctx = null;
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var _initialized = false;
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function _getCtx() {
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if (_ctx) return _ctx;
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if (typeof getAudioContext === 'function') _ctx = getAudioContext();
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else if (window.__sharedAudioCtx) _ctx = window.__sharedAudioCtx;
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else _ctx = new (window.AudioContext || window.webkitAudioContext)();
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return _ctx;
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}
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function init(audioCtx) {
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if (_initialized) return;
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_ctx = audioCtx || _getCtx();
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_gainNode = _ctx.createGain();
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_gainNode.gain.value = 1.0;
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_spn = _ctx.createScriptProcessor(SP_BUFFER, 0, 2);
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_spn.onaudioprocess = function (e) {
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var L = e.outputBuffer.getChannelData(0);
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var R = e.outputBuffer.getChannelData(1);
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L.fill(0); R.fill(0);
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if (!_queue.length) return;
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var f = _queue.shift();
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L.set(f.l); R.set(f.r);
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};
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_spn.connect(_gainNode);
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_initialized = true;
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console.log('[BridgeAudioNode] initialized (ring depth ' + RING_DEPTH + ')');
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}
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function onAudio(l, r) {
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if (!_initialized) init();
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_queue.push({ l: new Float32Array(l), r: new Float32Array(r) });
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if (_queue.length > RING_DEPTH) _queue.shift(); // drop oldest on overrun
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}
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function flush() { _queue = []; }
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function getOutputNode() { return _gainNode; }
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function disconnect() {
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flush();
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if (_spn && _gainNode) {
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try { _spn.disconnect(); } catch (e) {}
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try { _gainNode.disconnect(); } catch (e) {}
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}
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// Reset state so a later init() can rebuild (AudioRoutingEngine re-connect).
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_initialized = false;
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_spn = null;
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_gainNode = null;
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_ctx = null;
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}
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window.BridgeAudioNode = {
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init: init,
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onAudio: onAudio,
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flush: flush,
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getOutputNode: getOutputNode,
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connect: function (dest) { if (_gainNode) _gainNode.connect(dest); },
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disconnect: disconnect,
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isReady: function () { return _initialized; }
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};
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})();
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