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TAV decoding minor changes

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minjaesong
2025-10-13 01:42:44 +09:00
parent 222b9866a8
commit e705d274de
3 changed files with 7 additions and 16 deletions
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13
assets/disk0/tvdos/bin/playtav.js
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@@ -53,7 +53,6 @@ let subtitlePosition = 0 // 0=bottom center (default)
// Parse command line options // Parse command line options
let interactive = false let interactive = false
let userDefinedFilmGrain = false
let filmGrainLevel = null let filmGrainLevel = null
if (exec_args.length > 2) { if (exec_args.length > 2) {
@@ -69,7 +68,6 @@ if (exec_args.length > 2) {
const level = parseInt(parts[1]) const level = parseInt(parts[1])
if (!isNaN(level) && level >= 1 && level <= 32767) { if (!isNaN(level) && level >= 1 && level <= 32767) {
filmGrainLevel = level filmGrainLevel = level
userDefinedFilmGrain = true
} }
} }
// Try next argument if no '=' found // Try next argument if no '=' found
@@ -77,7 +75,6 @@ if (exec_args.length > 2) {
const level = parseInt(exec_args[i + 1]) const level = parseInt(exec_args[i + 1])
if (!isNaN(level) && level >= 1 && level <= 32767) { if (!isNaN(level) && level >= 1 && level <= 32767) {
filmGrainLevel = level filmGrainLevel = level
userDefinedFilmGrain = true
i++ // Skip next arg i++ // Skip next arg
} }
} }
@@ -298,13 +295,6 @@ if (header.version < 1 || header.version > 8) {
return 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 // Helper function to decode channel layout name
function getChannelLayoutName(layout) { function getChannelLayoutName(layout) {
switch (layout) { switch (layout) {
@@ -846,7 +836,6 @@ try {
currentCueIndex++ currentCueIndex++
} }
totalFilesProcessed++ totalFilesProcessed++
setFilmGrainLevel(header)
console.log(`\nStarting file ${currentFileIndex}:`) console.log(`\nStarting file ${currentFileIndex}:`)
console.log(`Resolution: ${header.width}x${header.height}`) console.log(`Resolution: ${header.width}x${header.height}`)
@@ -908,8 +897,8 @@ try {
serial.println(` FIELD_SIZE: ${FIELD_SIZE}`) serial.println(` FIELD_SIZE: ${FIELD_SIZE}`)
} }
//let thisFrameNoiseLevel = (filmGrainLevel >= 0) ? filmGrainLevel : -(filmGrainLevel - (trueFrameCount % 2))
// grain synthesis is now part of the spec // grain synthesis is now part of the spec
// TODO if filmGrainLevel != null, user requested custom film grain level
// Call new TAV hardware decoder that handles Zstd decompression internally // Call new TAV hardware decoder that handles Zstd decompression internally
// Note: No longer using JS gzip.decompFromTo - Kotlin handles Zstd natively // Note: No longer using JS gzip.decompFromTo - Kotlin handles Zstd natively

4
terranmon.txt
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@@ -943,6 +943,7 @@ transmission capability, and region-of-interest coding.
* Payload * Payload
## Packet Types ## Packet Types
<video packets>
0x10: I-frame (intra-coded frame) 0x10: I-frame (intra-coded frame)
0x11: P-frame (delta/skip frame) 0x11: P-frame (delta/skip frame)
0x1F: (prohibited) 0x1F: (prohibited)
@@ -965,7 +966,8 @@ transmission capability, and region-of-interest coding.
0xE2: ID3v2 packet 0xE2: ID3v2 packet
0xE3: Vorbis Comment packet 0xE3: Vorbis Comment packet
0xE4: CD-text packet 0xE4: CD-text packet
<End of Standard metadata> <Special packets>
0x00: No-op
0xF0: Loop point start 0xF0: Loop point start
0xF1: Loop point end 0xF1: Loop point end
0xFE: NTSC sync packet (used by player to calculate exact framerate-wise performance) 0xFE: NTSC sync packet (used by player to calculate exact framerate-wise performance)

6
tsvm_core/src/net/torvald/tsvm/GraphicsJSR223Delegate.kt
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@@ -4504,11 +4504,11 @@ class GraphicsJSR223Delegate(private val vm: VM) {
getPerceptualWeight(qIndex, qYGlobal, subband.level, subband.subbandType, false, decompLevels) getPerceptualWeight(qIndex, qYGlobal, subband.level, subband.subbandType, false, decompLevels)
} else { } else {
1.0f 1.0f
} }*/
// Noise amplitude for this subband // Noise amplitude for this subband
val noiseAmplitude = (quantiser * perceptualWeight) * 0.5f*/ // val noiseAmplitude = quantiser.coerceAtMost(32f) * 0.5f
val noiseAmplitude = quantiser.coerceAtMost(32f) * 0.5f val noiseAmplitude = qYGlobal.coerceAtMost(32) * 0.5f // using qYGlobal because quantiser is variable on bitrate-control mode and varying grain amp annoys viewer
// Remove noise from each coefficient in this subband // Remove noise from each coefficient in this subband
for (i in 0 until subband.coeffCount) { for (i in 0 until subband.coeffCount) {