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taut: volume and pan meter on playback

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minjaesong
2026-05-18 20:57:56 +09:00
parent 34fba4b2f2
commit 8e8374ba99
2 changed files with 101 additions and 35 deletions
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79
assets/disk0/tvdos/bin/taut.js
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@@ -984,6 +984,8 @@ const colRowNumEmph1 = 225
const colRowNumEmph2 = 155
const colStatus = 253
const colVoiceHdr = 230
const colVoiceHdrMuted = 249
const colVoiceHdrMutedCursorUp = 180
const colSep = 252
const colPushBtnBack = 143
const colTabBarBack = 187
@@ -1001,10 +1003,11 @@ const colBLACK = 240
// Voice-header playback meters (volume bar grows from centre out; pan bar = centre tick + dot).
// Pixels are drawn beneath text — only the glyph foregrounds occlude the bars, so the bars sit
// on rows 0 and (cellH - 1) where the 7×14 glyph has the least foreground.
const METER_VOL_COL = 41 // colHighlight
const METER_PAN_TICK_COL = 6 // colColumnSep
const METER_PAN_DOT_COL = 239 // colWHITE
const METER_BAR_PAD = 2 // px gap from cell edges (each side)
const METER_VOL_COL = colVol
const METER_PAN_COL = 214
const METER_VOL_TICK_COL = 127
const METER_PAN_TICK_COL = 198
const METER_BAR_PAD = 0 // px gap from cell edges (each side)
const METER_TRANSPARENT = 255
let separatorStyle = 0
@@ -1184,20 +1187,22 @@ function drawSeparators(style) {
}
}
const voiceHdrColByFlags = [colStatus, colVoiceHdr, colVoiceHdrMuted, colVoiceHdrMutedCursorUp] // default, cursorUp, muted, cursorUp+muted
function drawVoiceHeaders() {
fillLine(PTNVIEW_OFFSET_Y - 1, colVoiceHdr, 255)
fillLine(PTNVIEW_OFFSET_Y - 1, colStatus, 255)
const cue = song.cues[cueIdx]
for (let c = 0; c < VOCSIZE_TIMELINE_FULL; c++) {
const voice = voiceOff + c
const x = PTNVIEW_OFFSET_X + COLSIZE_TIMELINE_FULL * c
con.move(PTNVIEW_OFFSET_Y - 1, x)
if (voice >= song.numVoices) {
con.color_pair(colVoiceHdr, 255)
con.color_pair(colStatus, 255)
print(` `.substring(0, COLSIZE_TIMELINE_FULL))
} else {
const isCursor = (voice === cursorVox)
const isMuted = voiceMutes[voice]
con.color_pair(isMuted ? 249 : colVoiceHdr, isCursor ? colHighlight : 255)
con.color_pair(voiceHdrColByFlags[isMuted*2 + isCursor], 255)
const ptnIdx = cue.ptns[voice]
const vlabel = `V${(voice+1).dec02()}`
const plabel = (ptnIdx === CUE_EMPTY) ? '---' : ptnIdx.hex03()
@@ -1220,6 +1225,7 @@ function drawVoiceHeaders() {
// Per-slot cache of last-drawn meter state: { voice, vol, pan } or null when slot is clear.
// Indexed by slot index 0..VOCSIZE_TIMELINE_FULL-1 (never grows beyond 20 slots in practice).
const meterPrevSlot = new Array(20).fill(null)
const meterThickness = 2
function invalidateVoiceMeters() {
for (let i = 0; i < meterPrevSlot.length; i++) meterPrevSlot[i] = null
@@ -1228,12 +1234,10 @@ function invalidateVoiceMeters() {
// Wipe the pixel strip used by the voice-header meters back to transparent (255).
// Called when leaving the Timeline panel or when playback stops.
function clearVoiceMeters() {
const yTop = (PTNVIEW_OFFSET_Y - 2) * CELL_PH
const yBot = (PTNVIEW_OFFSET_Y - 1) * CELL_PH - 1
for (let x = 0; x < SCRPW; x++) {
graphics.plotPixel(x, yTop, METER_TRANSPARENT)
graphics.plotPixel(x, yBot, METER_TRANSPARENT)
}
const yPan = (PTNVIEW_OFFSET_Y - 2) * CELL_PH
const yVol = (PTNVIEW_OFFSET_Y - 1) * CELL_PH - meterThickness
graphics.plotRect(0, yPan, SCRPW, meterThickness, METER_TRANSPARENT)
graphics.plotRect(0, yVol, SCRPW, meterThickness, METER_TRANSPARENT)
invalidateVoiceMeters()
}
@@ -1241,31 +1245,35 @@ function clearVoiceMeters() {
* Repaint the per-voice volume and pan indicators in the voice-header row.
* Volume: horizontal bar growing from the cell centre outward, length ∝ effective tracker
* volume (after envelopes, fadeout, vol-column/D/tremolo ramps, per-voice fader). Drawn on
* the cell's bottom pixel row.
* Pan: centre tick + a single dot offset by (pan-128)/128 × halfWidth. Drawn on the cell's
* top pixel row.
* the bottom strip of the header row.
* Pan: horizontal bar stemming from the cell centre, signed length ∝ (pan-128)/128. Drawn
* on the top strip of the header row.
* Both strips get a centre tick drawn on top of the bar.
* Only redraws slots whose (voice, volPix, panPix) tuple has changed since the last call,
* so the work per frame stays bounded by actual movement.
*/
function drawVoiceMeters() {
if (playbackMode === PLAYMODE_NONE || currentPanel !== VIEW_TIMELINE) return
const yPan = (PTNVIEW_OFFSET_Y - 2) * CELL_PH // top pixel of header row
const yVol = (PTNVIEW_OFFSET_Y - 1) * CELL_PH - 1 // bottom pixel of header row
const yPan = (PTNVIEW_OFFSET_Y - 2) * CELL_PH // top edge of pan strip
const yVol = (PTNVIEW_OFFSET_Y - 1) * CELL_PH - meterThickness // top edge of vol strip
const slotPW = COLSIZE_TIMELINE_FULL * CELL_PW
const halfW = (slotPW >>> 1) - METER_BAR_PAD
// Skip the leftmost cell of every slot — it's a text-mode separator whose background
// colour paints on top of the framebuffer and would clip any meter pixels there.
const drawW = slotPW - CELL_PW
const halfW = (drawW >>> 1) - METER_BAR_PAD
const stripW = drawW - 2 * METER_BAR_PAD + 1
for (let c = 0; c < VOCSIZE_TIMELINE_FULL; c++) {
const voice = voiceOff + c
const slotX0 = (PTNVIEW_OFFSET_X + COLSIZE_TIMELINE_FULL * c - 1) * CELL_PW
const xCenter = slotX0 + (slotPW >>> 1)
const slotX0 = (PTNVIEW_OFFSET_X + COLSIZE_TIMELINE_FULL * c) * CELL_PW
const xCenter = slotX0 + (drawW >>> 1)
const xStrip = slotX0 + METER_BAR_PAD
const prev = meterPrevSlot[c]
if (voice >= song.numVoices) {
if (prev !== null) {
for (let x = slotX0 + METER_BAR_PAD; x < slotX0 + slotPW - METER_BAR_PAD; x++) {
graphics.plotPixel(x, yPan, METER_TRANSPARENT)
graphics.plotPixel(x, yVol, METER_TRANSPARENT)
}
graphics.plotRect(xStrip, yPan, stripW, meterThickness, METER_TRANSPARENT)
graphics.plotRect(xStrip, yVol, stripW, meterThickness, METER_TRANSPARENT)
meterPrevSlot[c] = null
}
continue
@@ -1282,19 +1290,20 @@ function drawVoiceMeters() {
if (prev !== null && prev.voice === voice && prev.vol === volPix && prev.pan === panPix) continue
// Clear both bar strips in this slot before redrawing.
for (let x = slotX0 + METER_BAR_PAD; x < slotX0 + slotPW - METER_BAR_PAD; x++) {
graphics.plotPixel(x, yPan, METER_TRANSPARENT)
graphics.plotPixel(x, yVol, METER_TRANSPARENT)
}
graphics.plotRect(xStrip, yPan, stripW, meterThickness, METER_TRANSPARENT)
graphics.plotRect(xStrip, yVol, stripW, meterThickness, METER_TRANSPARENT)
// Volume bar (grows from centre out). Silent voices show no bar.
if (volPix > 0) {
for (let dx = -volPix; dx <= volPix; dx++) {
graphics.plotPixel(xCenter + dx, yVol, METER_VOL_COL)
}
graphics.plotRect(xCenter - volPix, yVol, 2 * volPix + 1, meterThickness, METER_VOL_COL)
}
// Pan bar: faint centre tick, bright dot at pan position.
graphics.plotPixel(xCenter, yPan, METER_PAN_TICK_COL)
graphics.plotPixel(xCenter + panPix, yPan, METER_PAN_DOT_COL)
// Pan bar (stems from centre, direction = sign of panPix). Centred pan shows no bar.
if (panPix !== 0) {
const px0 = (panPix > 0) ? xCenter : xCenter + panPix
graphics.plotRect(px0, yPan, Math.abs(panPix) + 1, meterThickness, METER_PAN_COL)
}
// Centre ticks, drawn on top of the bars.
graphics.plotRect(xCenter-1, yPan, 3, meterThickness, METER_PAN_TICK_COL)
graphics.plotRect(xCenter-1, yVol, 3, meterThickness, METER_VOL_TICK_COL)
meterPrevSlot[c] = { voice: voice, vol: volPix, pan: panPix }
}