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TAV: decompression done on GPU

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minjaesong
2025-09-29 01:35:19 +09:00
parent 66909537a0
commit 5012ca4085
3 changed files with 64 additions and 24 deletions
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35
assets/disk0/tvdos/bin/playtav.js
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@@ -69,18 +69,17 @@ let notifHideTimer = 0
const NOTIF_SHOWUPTIME = 3000000000
let [cy, cx] = con.getyx()
let seqreadserial = require("seqread")
let seqreadtape = require("seqreadtape")
//let playgui = require("playgui")
let seqread = undefined
let fullFilePathStr = fullFilePath.full
// Select seqread driver to use
if (fullFilePathStr.startsWith('$:/TAPE') || fullFilePathStr.startsWith('$:\\\\TAPE')) {
seqread = seqreadtape
if (fullFilePathStr.startsWith('$:/TAPE') || fullFilePathStr.startsWith('$:\\TAPE')) {
seqread = require("seqreadtape")
seqread.prepare(fullFilePathStr)
seqread.seek(0)
} else {
seqread = seqreadserial
seqread = require("seqread")
seqread.prepare(fullFilePathStr)
}
@@ -686,33 +685,20 @@ try {
else if (packetType === TAV_PACKET_IFRAME || packetType === TAV_PACKET_PFRAME) {
// Video packet
const compressedSize = seqread.readInt()
const isKeyframe = (packetType === TAV_PACKET_IFRAME)
// Read compressed tile data
let compressedPtr = seqread.readBytes(compressedSize)
updateDataRateBin(compressedSize)
let actualSize
let decompressStart = sys.nanoTime()
try {
// Use gzip decompression (only compression format supported in TSVM JS)
actualSize = gzip.decompFromTo(compressedPtr, compressedSize, blockDataPtr)
decompressTime = (sys.nanoTime() - decompressStart) / 1000000.0
} catch (e) {
decompressTime = (sys.nanoTime() - decompressStart) / 1000000.0
console.log(`Frame ${frameCount}: Gzip decompression failed, skipping (compressed size: ${compressedSize}, error: ${e})`)
sys.free(compressedPtr)
continue
}
try {
// serial.println(actualSize)
let decodeStart = sys.nanoTime()
// Call TAV hardware decoder (like TEV's tevDecode but with RGB buffer outputs)
graphics.tavDecode(
blockDataPtr,
CURRENT_RGB_ADDR, PREV_RGB_ADDR, // RGB buffer pointers (not float arrays!)
// Call new TAV hardware decoder that handles Zstd decompression internally
// Note: No longer using JS gzip.decompFromTo - Kotlin handles Zstd natively
graphics.tavDecodeCompressed(
compressedPtr, // Pass compressed data directly
compressedSize, // Size of compressed data
CURRENT_RGB_ADDR, PREV_RGB_ADDR, // RGB buffer pointers
header.width, header.height,
header.qualityLevel, header.qualityY, header.qualityCo, header.qualityCg,
frameCount,
@@ -723,6 +709,7 @@ try {
)
decodeTime = (sys.nanoTime() - decodeStart) / 1000000.0
decompressTime = 0 // Decompression time now included in decode time
// Upload RGB buffer to display framebuffer (like TEV)
let uploadStart = sys.nanoTime()