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TAV: channel layouts

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minjaesong
2025-09-29 16:34:08 +09:00
parent 907cc37b01
commit 7608e7433a
6 changed files with 286 additions and 80 deletions
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38
assets/disk0/tvdos/bin/playtav.js
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@@ -25,6 +25,7 @@ const TAV_PACKET_IFRAME = 0x10
const TAV_PACKET_PFRAME = 0x11
const TAV_PACKET_AUDIO_MP2 = 0x20
const TAV_PACKET_SUBTITLE = 0x30
const TAV_PACKET_SYNC_NTSC = 0xFE
const TAV_PACKET_SYNC = 0xFF
const TAV_FILE_HEADER_FIRST = 0x1F
@@ -378,6 +379,7 @@ let header = {
extraFlags: 0,
videoFlags: 0,
qualityLevel: 0,
channelLayout: 0,
fileRole: 0
}
@@ -414,10 +416,11 @@ header.qualityCg = seqread.readOneByte()
header.extraFlags = seqread.readOneByte()
header.videoFlags = seqread.readOneByte()
header.qualityLevel = seqread.readOneByte() // the decoder expects biased value
header.channelLayout = seqread.readOneByte()
header.fileRole = seqread.readOneByte()
// Skip reserved bytes
seqread.skip(5)
seqread.skip(4)
if (header.version < 1 || header.version > 6) {
printerrln(`Error: Unsupported TAV version ${header.version}`)
@@ -425,6 +428,19 @@ if (header.version < 1 || header.version > 6) {
return
}
// Helper function to decode channel layout name
function getChannelLayoutName(layout) {
switch (layout) {
case 0: return "Y-Co-Cg"
case 1: return "Y-Co-Cg-A"
case 2: return "Y-only"
case 3: return "Y-A"
case 4: return "Co-Cg"
case 5: return "Co-Cg-A"
default: return `Unknown (${layout})`
}
}
const hasAudio = (header.extraFlags & 0x01) !== 0
const hasSubtitles = (header.extraFlags & 0x02) !== 0
const progressiveTransmission = (header.extraFlags & 0x04) !== 0
@@ -446,6 +462,7 @@ console.log(`Total frames: ${header.totalFrames}`)
console.log(`Wavelet filter: ${header.waveletFilter === WAVELET_5_3_REVERSIBLE ? "5/3 reversible" : header.waveletFilter === WAVELET_9_7_IRREVERSIBLE ? "9/7 irreversible" : header.waveletFilter === WAVELET_BIORTHOGONAL_13_7 ? "Biorthogonal 13/7" : header.waveletFilter === WAVELET_DD4 ? "DD-4" : header.waveletFilter === WAVELET_HAAR ? "Haar" : "unknown"}`)
console.log(`Decomposition levels: ${header.decompLevels}`)
console.log(`Quality: Y=${header.qualityY}, Co=${header.qualityCo}, Cg=${header.qualityCg}`)
console.log(`Channel layout: ${getChannelLayoutName(header.channelLayout)}`)
console.log(`Tiles: ${tilesX}x${tilesY} (${numTiles} total)`)
console.log(`Colour space: ${header.version === 2 ? "ICtCp" : "YCoCg-R"}`)
console.log(`Features: ${hasAudio ? "Audio " : ""}${hasSubtitles ? "Subtitles " : ""}${progressiveTransmission ? "Progressive " : ""}${roiCoding ? "ROI " : ""}`)
@@ -599,13 +616,16 @@ function tryReadNextTAVHeader() {
qualityCg: seqread.readOneByte(),
extraFlags: seqread.readOneByte(),
videoFlags: seqread.readOneByte(),
reserved: new Array(7)
qualityLevel: seqread.readOneByte(),
channelLayout: seqread.readOneByte(),
fileRole: seqread.readOneByte(),
reserved: new Array(4)
}
serial.println("File header: " + JSON.stringify(newHeader))
// Skip reserved bytes
for (let i = 0; i < 7; i++) {
for (let i = 0; i < 4; i++) {
seqread.readOneByte()
}
@@ -670,10 +690,13 @@ try {
break
}
if (packetType === TAV_PACKET_SYNC) {
if (packetType === TAV_PACKET_SYNC || packetType == TAV_PACKET_SYNC_NTSC) {
// Sync packet - no additional data
akku -= FRAME_TIME
frameCount++
if (packetType == TAV_PACKET_SYNC) {
frameCount++
}
trueFrameCount++
// Swap ping-pong buffers instead of expensive memcpy (752KB copy eliminated!)
@@ -701,7 +724,8 @@ try {
CURRENT_RGB_ADDR, PREV_RGB_ADDR, // RGB buffer pointers
header.width, header.height,
header.qualityLevel, header.qualityY, header.qualityCo, header.qualityCg,
frameCount,
header.channelLayout, // Channel layout for variable processing
trueFrameCount,
header.waveletFilter, // TAV-specific parameter
header.decompLevels, // TAV-specific parameter
isLossless,
@@ -713,7 +737,7 @@ try {
// Upload RGB buffer to display framebuffer (like TEV)
let uploadStart = sys.nanoTime()
graphics.uploadRGBToFramebuffer(CURRENT_RGB_ADDR, header.width, header.height, frameCount, false)
graphics.uploadRGBToFramebuffer(CURRENT_RGB_ADDR, header.width, header.height, trueFrameCount, false)
uploadTime = (sys.nanoTime() - uploadStart) / 1000000.0
// Defer audio playback until a first frame is sent