];
vocalPlan().forEach(function (v) { var c = VOX.clips[v.text]; if (!c) return; c.rms.forEach(function (r, j) { pts.push([(v.t + j / c.rms.length * c.dur) / tot * w, r]); }); });
if (!pts.length) { g.fillStyle = '#777'; g.fillText('Render vocals to see the expression curve', 34, h / 2 + 3); return; }
var bias = S.voice.pitch / 12; g.strokeStyle = '#ff3048'; g.lineWidth = 1.6; g.beginPath();
pts.forEach(function (p, i) { var y = h - 6 - Math.max(0, Math.min(1, p[1] * 3.2 + 0.15 + bias * 0.3)) * (h - 12); if (i) g.lineTo(p[0], y); else g.moveTo(p[0], y); }); g.stroke();
}
function b64ToBuf(b64) { var bin = atob(b64), u = new Uint8Array(bin.length); for (var i = 0; i < bin.length; i++) u[i] = bin.charCodeAt(i); return u.buffer; }
function analyse(buf) { var d = buf.getChannelData(0), N = 160, peaks = [], rms = [], step = Math.max(1, Math.floor(d.length / N)); for (var i = 0; i < N; i++) { var mx = 0, s = 0; for (var j = i * step; j < (i + 1) * step && j < d.length; j++) { var a = Math.abs(d[j]); if (a > mx) mx = a; s += d[j] * d[j]; } peaks.push(Math.min(1, mx * 1.4)); rms.push(Math.sqrt(s / step)); } return { peaks: peaks, rms: rms }; }
function renderVocals(btn) {
var lines = uniqueLines(); if (!lines.length) { toast('No lyrics placed in the song yet — generate or write lyrics first.'); return Promise.resolve(false); }
if (lines.length > 40) { lines = lines.slice(0, 40); toast('Voicing the first 40 unique lines.'); }
var st = $('#es-vstatus'), badge = $('#es-av-state'); busy(btn, true); badge.textContent = 'RENDERING'; badge.classList.add('busy');
st.textContent = 'Rendering ' + lines.length + ' unique lines with ' + S.voice.name + '… about ' + Math.round(lines.length * 5 + 8) + 's.';
return unlock().catch(function () {}).then(function () {
return api('POST', '/api/ss/voice', { lines: lines, voice: S.voice.name, speed: S.voice.speed, pitch: S.voice.pitch });
}).then(function (start) {
return new Promise(function (resolve, reject) {
var tries = 0;
(function poll() {
if (++tries > 250) return reject(new Error('Voice took too long. Try fewer lines.'));
api('GET', '/api/ss/voice/' + encodeURIComponent(start.job)).then(function (j) { if (j.status === 'done') return resolve(j); st.textContent = 'Voicing line ' + Math.min(j.total, j.done + 1) + ' of ' + j.total + '…'; setTimeout(poll, 2000); }, reject);
})();
});
}).then(function (j) {
engine(); var ctx = Tone.getContext().rawContext, fresh = {};
return Promise.all((j.clips || []).map(function (c) {
return new Promise(function (res) { ctx.decodeAudioData(b64ToBuf(c.b64), function (buf) { var a = analyse(buf); fresh[lines[c.i]] = { buf: new Tone.ToneAudioBuffer(buf), dur: buf.duration, peaks: a.peaks, rms: a.rms }; res(); }, function () { res(); }); });
})).then(function () {
VOX.clips = fresh; var n = Object.keys(fresh).length, over = (VOX.clips = fresh, vocalPlan().filter(function (v) { return v.spill > 0.3; }).length);
st.textContent = n + ' of ' + lines.length + ' lines voiced and placed on the timeline.' + (over ? ' ' + over + ' line(s) spill past their section — raise the voice speed or the section bars.' : '');
drawTimeline(); drawCurve(); return true;
});
}).catch(function (e) { st.textContent = e.message; return false; })
.then(function (ok) { busy(btn, false); badge.textContent = 'READY'; badge.classList.remove('busy'); return ok; });
}
$('#es-render').addEventListener('click', function () { renderVocals(this); });
// ------------------------------------------------------------------ writer
function chatAdd(who, text) { S.chat.push({ who: who, text: text }); S.chat = S.chat.slice(-12); renderChat(); save(); }
function renderChat() {
var c = $('#es-chat'), msgs = S.chat.length ? S.chat : [{ who: 'ai', text: 'Describe the song — I\'ll write the lyrics, build every section (intro, verse, chorus, bridge, outro), arrange it and voice it.' }];
c.innerHTML = msgs.map(function (m) { return '' + esc(m.text) + '
'; }).join(''); c.scrollTop = c.scrollHeight;
}
function renderBlocks() {
var bl = blocks();
$('#es-blocks').innerHTML = bl.length ? bl.map(function (b, i) { return '' + esc(b.label.toUpperCase()) + '
'; }).join('')
: 'Lyrics appear here as section blocks. You can edit any line.
';
$('#es-suno').value = S.suno || '';
}
$('#es-blocks').addEventListener('input', function (e) {
var t = e.target; if (!t.hasAttribute('data-bi')) return;
t.style.height = 'auto'; t.style.height = t.scrollHeight + 'px';
var bl = blocks(); bl[+t.getAttr