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TAV: will replace frame aligning with something else, or maybe with nothing

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minjaesong
2025-10-17 06:48:21 +09:00
parent 93622fc8ca
commit 3b9e02b17f
3 changed files with 299 additions and 60 deletions
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23
assets/disk0/tvdos/bin/playtav.js
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@@ -999,7 +999,18 @@ try {
// Read GOP size (number of frames in this GOP, 1-16)
const gopSize = seqread.readOneByte()
// Read motion vectors (quarter-pixel units, int16)
// Read canvas expansion margins (4 bytes)
// Encoder expands canvas to preserve all original pixels from all aligned frames
const marginLeft = seqread.readOneByte()
const marginRight = seqread.readOneByte()
const marginTop = seqread.readOneByte()
const marginBottom = seqread.readOneByte()
// Calculate expanded canvas dimensions
const canvasWidth = header.width + marginLeft + marginRight
const canvasHeight = header.height + marginTop + marginBottom
// Read motion vectors (1/16-pixel units, int16)
// Encoder writes ALL motion vectors including frame 0
let motionX = new Array(gopSize)
let motionY = new Array(gopSize)
@@ -1042,7 +1053,7 @@ try {
try {
let decodeStart = sys.nanoTime()
// Call GOP decoder
// Call GOP decoder with canvas expansion information
const [r1, r2] = graphics.tavDecodeGopUnified(
compressedPtr,
compressedSize,
@@ -1050,8 +1061,12 @@ try {
motionX,
motionY,
gopRGBBuffers, // Array of output buffer addresses
header.width,
header.height,
header.width, // Original frame width
header.height, // Original frame height
canvasWidth, // Expanded canvas width (preserves all pixels)
canvasHeight, // Expanded canvas height (preserves all pixels)
marginLeft, // Left margin
marginTop, // Top margin
header.qualityLevel,
QLUT[header.qualityY],
QLUT[header.qualityCo],