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TAV: iS tHiS aN iMpRoVeMeNt¿

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minjaesong
2025-10-16 09:24:21 +09:00
parent cc2f3e4d57
commit 0cf1173dd6
3 changed files with 110 additions and 46 deletions
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45
assets/disk0/tvdos/bin/playtav.js
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@@ -4,6 +4,8 @@
// Usage: playtav moviefile.tav [options]
// Options: -i (interactive)
const MAXMEM = sys.maxmem()
const WIDTH = 560
const HEIGHT = 448
const TAV_MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x54, 0x41, 0x56] // "\x1FTSVM TAV"
@@ -1016,8 +1018,8 @@ try {
// Check if GOP fits in VM memory
const gopMemoryNeeded = gopSize * FRAME_SIZE
if (gopMemoryNeeded > 8 * 1024 * 1024) {
throw new Error(`GOP too large: ${gopSize} frames needs ${(gopMemoryNeeded / 1024 / 1024).toFixed(2)}MB, but VM has only 8MB. Max GOP size: 11 frames.`)
if (gopMemoryNeeded > MAXMEM) {
throw new Error(`GOP too large: ${gopSize} frames needs ${(gopMemoryNeeded / 1048576).toFixed(2)}MB, but VM has only ${(MAXMEM / 1048576).toFixed(1)}MB. Max GOP size: 11 frames for 8MB system.`)
}
// Allocate GOP buffers outside try block so finally can free them
@@ -1037,7 +1039,7 @@ try {
let decodeStart = sys.nanoTime()
// Call GOP decoder
const framesDecoded = graphics.tavDecodeGopUnified(
const [r1, r2] = graphics.tavDecodeGopUnified(
compressedPtr,
compressedSize,
gopSize,
@@ -1056,14 +1058,18 @@ try {
2 // temporalLevels (hardcoded for now, could be in header)
)
const framesDecoded = r1
decoderDbgInfo = r2
decodeTime = (sys.nanoTime() - decodeStart) / 1000000.0
decompressTime = 0 // Included in decode time
// Display each decoded frame
// Display each decoded frame with proper timing
for (let i = 0; i < framesDecoded; i++) {
let uploadStart = sys.nanoTime()
let frameStart = sys.nanoTime()
let uploadStart = frameStart
// Upload GOP frame directly (no copy needed - already in ARGB format)
// Upload GOP frame directly (no copy needed - already in RGB24 format)
graphics.uploadRGBToFramebuffer(gopRGBBuffers[i], header.width, header.height, trueFrameCount + i, false)
uploadTime = (sys.nanoTime() - uploadStart) / 1000000.0
@@ -1080,14 +1086,27 @@ try {
audioFired = true
}
// Wait for frame timing
akku -= FRAME_TIME
while (akku < 0 && !stopPlay && !paused) {
let t = sys.nanoTime()
// Busy wait for accurate timing
akku += (sys.nanoTime() - t) / 1000000000.0
// Calculate how much time we've used so far for this frame
let frameElapsed = (sys.nanoTime() - frameStart) / 1000000000.0
// Wait for the remainder of FRAME_TIME (busy wait for accurate timing)
let waitNeeded = FRAME_TIME - frameElapsed
if (waitNeeded > 0) {
let waitStart = sys.nanoTime()
while ((sys.nanoTime() - waitStart) / 1000000000.0 < waitNeeded && !stopPlay && !paused) {
sys.sleep(0) // Busy wait
}
}
// Update global time tracking to keep main loop synchronized
let frameEnd = sys.nanoTime()
let frameTotalTime = (frameEnd - frameStart) / 1000000000.0
akku2 += frameTotalTime
t1 = frameEnd // Keep t1 synchronized with actual time
frameCount++
trueFrameCount++
// Swap ping-pong buffers for P-frame reference
let temp = CURRENT_RGB_ADDR
CURRENT_RGB_ADDR = PREV_RGB_ADDR
@@ -1124,7 +1143,7 @@ try {
e.printStackTrace()
let ee = e.getStackTrace()
console.log(ee.length)
console.log(ee.join('\n'))
console.log(ee.slice(0, 10).join('\n'))
}
} catch (ex) {}
} finally {