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optimised IDCT on decoding

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minjaesong
2025-08-22 00:28:19 +09:00
parent e10cd166f0
commit 270864ef0f
2 changed files with 68 additions and 73 deletions
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4
assets/disk0/tvdos/bin/playtev.js
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@@ -200,11 +200,11 @@ try {
}
// Decompress using gzip
// Calculate proper buffer size for TEV YCoCg-R blocks
// Optimized buffer size calculation for TEV YCoCg-R blocks
let blocksX = (width + 15) >> 4 // 16x16 blocks
let blocksY = (height + 15) >> 4
let tevBlockSize = 1 + 4 + 2 + (256 * 2) + (64 * 2) + (64 * 2) // mode + mv + cbp + Y(16x16) + Co(8x8) + Cg(8x8)
let decompressedSize = blocksX * blocksY * tevBlockSize * 2 // Double for safety
let decompressedSize = Math.max(payloadLen * 4, blocksX * blocksY * tevBlockSize) // More efficient sizing
let blockDataPtr = sys.malloc(decompressedSize)
let actualSize