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TAV: fix initial GOP skipping

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minjaesong
2025-10-22 19:31:10 +09:00
parent 4265891093
commit 7f7222fe54
1 changed files with 88 additions and 2 deletions
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90
assets/disk0/tvdos/bin/playtav.js
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@@ -1129,8 +1129,36 @@ try {
asyncDecodeStartTime = sys.nanoTime()
} else if (currentGopSize === 0 && asyncDecodeInProgress) {
// Case 2: First GOP still decoding - ignore to avoid cancellation
sys.free(compressedPtr)
// Case 2: First GOP still decoding - buffer GOPs without starting decode
// These will be decoded once playback starts
if (readyGopData === null) {
// Buffer as ready GOP (will decode when first GOP finishes)
const nextSlot = (currentGopBufferSlot + 1) % BUFFER_SLOTS
readyGopData = {
gopSize: gopSize,
slot: nextSlot,
compressedPtr: compressedPtr,
compressedSize: compressedSize,
needsDecode: true, // Flag that decode hasn't started yet
startTime: 0,
timeRemaining: 0
}
} else if (decodingGopData === null) {
// Buffer as decoding GOP (will decode after ready GOP)
const decodingSlot = (currentGopBufferSlot + 2) % BUFFER_SLOTS
decodingGopData = {
gopSize: gopSize,
slot: decodingSlot,
compressedPtr: compressedPtr,
compressedSize: compressedSize,
needsDecode: true, // Flag that decode hasn't started yet
startTime: 0,
timeRemaining: 0
}
} else {
// All 3 buffers full - discard this GOP
sys.free(compressedPtr)
}
} else if (currentGopSize > 0 && readyGopData === null && !asyncDecodeInProgress && graphics.tavDecodeGopIsComplete()) {
// Case 3: GOP playing, no ready GOP, no decode in progress - decode to ready slot
@@ -1416,6 +1444,27 @@ try {
sys.free(asyncDecodePtr)
asyncDecodePtr = 0
asyncDecodeGopSize = 0
// Start decode of buffered ready GOP if it exists
if (readyGopData !== null && readyGopData.needsDecode) {
const framesRemaining = currentGopSize - currentGopFrameIndex
const timeRemaining = framesRemaining * FRAME_TIME * 1000.0
graphics.tavDecodeGopToVideoBufferAsync(
readyGopData.compressedPtr, readyGopData.compressedSize, readyGopData.gopSize,
header.width, header.height,
header.qualityLevel,
QLUT[header.qualityY], QLUT[header.qualityCo], QLUT[header.qualityCg],
header.channelLayout,
header.waveletFilter, header.decompLevels, 2,
header.entropyCoder,
readyGopData.slot * SLOT_SIZE
)
readyGopData.needsDecode = false
readyGopData.startTime = sys.nanoTime()
readyGopData.timeRemaining = timeRemaining
}
}
}
@@ -1466,6 +1515,27 @@ try {
predecodedPcmOffset += uploadSize
}
// Start decode of buffered decoding GOP if ready GOP decode is complete
if (decodingGopData !== null && decodingGopData.needsDecode && graphics.tavDecodeGopIsComplete()) {
const framesRemaining = currentGopSize - currentGopFrameIndex
const timeRemaining = framesRemaining * FRAME_TIME * 1000.0
graphics.tavDecodeGopToVideoBufferAsync(
decodingGopData.compressedPtr, decodingGopData.compressedSize, decodingGopData.gopSize,
header.width, header.height,
header.qualityLevel,
QLUT[header.qualityY], QLUT[header.qualityCo], QLUT[header.qualityCg],
header.channelLayout,
header.waveletFilter, header.decompLevels, 2,
header.entropyCoder,
decodingGopData.slot * SLOT_SIZE
)
decodingGopData.needsDecode = false
decodingGopData.startTime = sys.nanoTime()
decodingGopData.timeRemaining = timeRemaining
}
// Schedule next frame
nextFrameTime += (frametime) // frametime is in nanoseconds from header
}
@@ -1474,6 +1544,22 @@ try {
// Step 4-7: GOP finished? Transition to ready GOP (triple-buffering)
if (!paused && currentGopSize > 0 && currentGopFrameIndex >= currentGopSize) {
if (readyGopData !== null) {
// If ready GOP still needs decode, start it now (defensive - should already be started)
if (readyGopData.needsDecode) {
graphics.tavDecodeGopToVideoBufferAsync(
readyGopData.compressedPtr, readyGopData.compressedSize, readyGopData.gopSize,
header.width, header.height,
header.qualityLevel,
QLUT[header.qualityY], QLUT[header.qualityCo], QLUT[header.qualityCg],
header.channelLayout,
header.waveletFilter, header.decompLevels, 2,
header.entropyCoder,
readyGopData.slot * SLOT_SIZE
)
readyGopData.needsDecode = false
readyGopData.startTime = sys.nanoTime()
}
// Ready GOP exists - wait for it to finish decoding if still in progress
while (!graphics.tavDecodeGopIsComplete() && !paused) {
sys.sleep(1)