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proper subtitle handling

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minjaesong
2025-08-28 11:03:57 +09:00
parent 3989f409f7
commit c1d7a8e982
1 changed files with 43 additions and 32 deletions
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75
assets/disk0/tvdos/bin/playtev.js
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@@ -23,8 +23,22 @@ const TEV_MODE_MOTION = 0x03
const TEV_PACKET_IFRAME = 0x10
const TEV_PACKET_PFRAME = 0x11
const TEV_PACKET_AUDIO_MP2 = 0x20
const TEV_PACKET_SUBTITLE = 0x30
const TEV_PACKET_SYNC = 0xFF
// Subtitle opcodes (SSF format)
const SSF_OP_NOP = 0x00
const SSF_OP_SHOW = 0x01
const SSF_OP_HIDE = 0x02
const SSF_OP_MOVE = 0x10
const SSF_OP_UPLOAD_LOW_FONT = 0x30
const SSF_OP_UPLOAD_HIGH_FONT = 0x31
// Subtitle state
let subtitleVisible = false
let subtitleText = ""
let subtitlePosition = 0 // 0=bottom center (default)
const interactive = exec_args[2] && exec_args[2].toLowerCase() == "-i"
const debugMotionVectors = exec_args[2] && exec_args[2].toLowerCase() == "-debug-mv"
const fullFilePath = _G.shell.resolvePathInput(exec_args[1])
@@ -89,44 +103,36 @@ function displaySubtitle(text, position = 0) {
return
}
// Set subtitle colors: yellow (230) on black (0)
// Set subtitle colors: yellow (231) on black (0)
let oldFgColor = con.get_color_fore()
let oldBgColor = con.get_color_back()
con.color_pair_pair(230, 0)
con.color_pair(231, 0)
// Split text into lines
let lines = text.split('\n')
// Calculate position based on subtitle position setting
let startRow, startCol
let longestLineLength = lines.map(s => s.length).sort().last()
switch (position) {
case 0: // bottom center
startRow = 32 - lines.length + 1
break
case 1: // bottom left
startRow = 32 - lines.length + 1
break
case 2: // center left
case 6: // center right
case 8: // dead center
startRow = 16 - Math.floor(lines.length / 2)
break
case 3: // top left
startRow = 2
break
case 4: // top center
startRow = 2
break
case 5: // top right
startRow = 2
break
case 6: // center right
startRow = 16 - Math.floor(lines.length / 2)
break
case 0: // bottom center
case 1: // bottom left
case 7: // bottom right
startRow = 32 - lines.length + 1
break
default:
startRow = 32 - lines.length + 1 // Default to bottom center
startRow = 32 - lines.length
startRow = 32 - lines.length
startRow = 32 - lines.length // Default to bottom center
}
// Display each line
@@ -140,10 +146,6 @@ function displaySubtitle(text, position = 0) {
// Calculate column based on alignment
switch (position) {
case 0: // bottom center
case 4: // top center
startCol = Math.max(1, Math.floor((80 - line.length) / 2) + 1)
break
case 1: // bottom left
case 2: // center left
case 3: // top left
@@ -152,13 +154,18 @@ function displaySubtitle(text, position = 0) {
case 5: // top right
case 6: // center right
case 7: // bottom right
startCol = Math.max(1, 80 - line.length)
startCol = Math.max(1, 78 - line.length)
break
case 0: // bottom center
case 4: // top center
case 8: // dead center
default:
startCol = Math.max(1, Math.floor((80 - line.length) / 2) + 1)
startCol = Math.max(1, Math.floor((80 - longestLineLength) / 2) + 1)
break
}
con.move(row, startCol)
// TODO insert half-width pillars to cap the subtitle blocks
print(line) // Unicode-capable print function
}
@@ -516,9 +523,11 @@ try {
audio.mp2UploadDecoded(0)
} else if (packetType == TEV_PACKET_SUBTITLE) {
// Subtitle packet - NEW!
// Subtitle packet
let packetSize = seqread.readInt()
processSubtitlePacket(packetSize)
} else if (packetType == 0x00) {
// Silently discard, faulty subtitle creation can cause this as 0x00 is used as an argument terminator
} else {
println(`Unknown packet type: 0x${packetType.toString(16)}`)
break
@@ -537,13 +546,15 @@ try {
notifHidden = true
}
con.move(31, 1)
graphics.setTextFore(161)
print(`Frame: ${frameCount}/${totalFrames} (${((frameCount / akku2 * 100)|0) / 100}f) `)
con.move(32, 1)
graphics.setTextFore(161)
print(`VRate: ${(getVideoRate() / 1024 * 8)|0} kbps `)
con.move(1, 1)
if (!hasSubtitle) {
con.move(31, 1)
graphics.setTextFore(161)
print(`Frame: ${frameCount}/${totalFrames} (${((frameCount / akku2 * 100)|0) / 100}f) `)
con.move(32, 1)
graphics.setTextFore(161)
print(`VRate: ${(getVideoRate() / 1024 * 8)|0} kbps `)
con.move(1, 1)
}
}
t1 = t2