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film grain effect to alleviate 3d scene with low-res texture look

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minjaesong
2025-10-08 02:07:29 +09:00
parent f918cd429c
commit d08511a39d
2 changed files with 72 additions and 9 deletions
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35
assets/disk0/tvdos/bin/playtav.js
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@@ -53,6 +53,8 @@ let subtitlePosition = 0 // 0=bottom center (default)
// Parse command line options
let interactive = false
let userDefinedFilmGrain = false
let filmGrainLevel = null
if (exec_args.length > 2) {
for (let i = 2; i < exec_args.length; i++) {
@@ -60,6 +62,26 @@ if (exec_args.length > 2) {
if (arg === "-i") {
interactive = true
}
else if (arg.startsWith("--filter-film-grain")) {
// Extract noise level from argument
const parts = arg.split(/[=\s]/)
if (parts.length > 1) {
const level = parseInt(parts[1])
if (!isNaN(level) && level >= 1 && level <= 32767) {
filmGrainLevel = level
userDefinedFilmGrain = true
}
}
// Try next argument if no '=' found
else if (i + 1 < exec_args.length) {
const level = parseInt(exec_args[i + 1])
if (!isNaN(level) && level >= 1 && level <= 32767) {
filmGrainLevel = level
userDefinedFilmGrain = true
i++ // Skip next arg
}
}
}
}
}
@@ -271,6 +293,13 @@ if (header.version < 1 || header.version > 8) {
return
}
function setFilmGrainLevel(header) {
// decide film grain strength by quality level
filmGrainLevel = [9,6,-4,3,-2,-2,-2][header.qualityLevel - 1]
}
setFilmGrainLevel(header)
// Helper function to decode channel layout name
function getChannelLayoutName(layout) {
switch (layout) {
@@ -670,6 +699,7 @@ try {
currentCueIndex++
}
totalFilesProcessed++
setFilmGrainLevel(header)
console.log(`\nStarting file ${currentFileIndex}:`)
console.log(`Resolution: ${header.width}x${header.height}`)
@@ -726,6 +756,8 @@ try {
serial.println(` FIELD_SIZE: ${FIELD_SIZE}`)
}
let thisFrameNoiseLevel = (filmGrainLevel >= 0) ? filmGrainLevel : -(filmGrainLevel - (trueFrameCount % 2))
// Call new TAV hardware decoder that handles Zstd decompression internally
// Note: No longer using JS gzip.decompFromTo - Kotlin handles Zstd natively
decoderDbgInfo = graphics.tavDecodeCompressed(
@@ -739,7 +771,8 @@ try {
header.waveletFilter, // TAV-specific parameter
header.decompLevels, // TAV-specific parameter
isLossless,
header.version // TAV version for colour space detection
header.version, // TAV version for colour space detection
thisFrameNoiseLevel // Undocumented spooky noise filter
)
decodeTime = (sys.nanoTime() - decodeStart) / 1000000.0