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More or less working deinterlacer

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minjaesong
2025-09-02 22:23:27 +09:00
parent 4fb849d794
commit 8abdb8b9a6
2 changed files with 105 additions and 77 deletions
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62
assets/disk0/tvdos/bin/playtev.js
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@@ -438,8 +438,9 @@ const RGB_BUFFER_B = sys.malloc(FRAME_SIZE)
// Static Yadif deinterlacing buffers (half-height field buffers for interlaced mode)
const FIELD_SIZE = 560 * 224 * 3 // Half-height field buffer size
const TEMP_FIELD_BUFFER = sys.malloc(FIELD_SIZE)
const PREV_FIELD_BUFFER = sys.malloc(FIELD_SIZE)
const CURR_FIELD_BUFFER = isInterlaced ? sys.malloc(FIELD_SIZE) : 0
const PREV_FIELD_BUFFER = isInterlaced ? sys.malloc(FIELD_SIZE) : 0
const NEXT_FIELD_BUFFER = isInterlaced ? sys.malloc(FIELD_SIZE) : 0 // For temporal prediction
// Ping-pong buffer pointers (swap instead of copy)
let CURRENT_RGB_ADDR = RGB_BUFFER_A
@@ -450,8 +451,9 @@ sys.memset(RGB_BUFFER_A, 0, FRAME_PIXELS * 3)
sys.memset(RGB_BUFFER_B, 0, FRAME_PIXELS * 3)
// Initialize Yadif field buffers to black
sys.memset(TEMP_FIELD_BUFFER, 0, FIELD_SIZE)
sys.memset(CURR_FIELD_BUFFER, 0, FIELD_SIZE)
sys.memset(PREV_FIELD_BUFFER, 0, FIELD_SIZE)
sys.memset(NEXT_FIELD_BUFFER, 0, FIELD_SIZE)
// Initialize display framebuffer to black
sys.memset(DISPLAY_RG_ADDR, 0, FRAME_PIXELS) // Black in RG plane
@@ -461,6 +463,12 @@ let frameCount = 0
let stopPlay = false
let akku = FRAME_TIME
let akku2 = 0.0
// Frame buffering for temporal prediction (interlaced mode only)
let bufferedFrames = [] // Queue of decoded frames for temporal prediction
let frameBuffer1 = null // Current frame data
let frameBuffer2 = null // Previous frame data
let frameDisplayDelay = 1 // Display frames 1 frame delayed for temporal prediction
let mp2Initialised = false
let audioFired = false
@@ -515,6 +523,20 @@ function setBiasLighting() {
let blockDataPtr = sys.malloc(FRAME_SIZE)
// Streaming frame buffer rotation for temporal prediction
// Buffers rotate: NEXT -> CURRENT -> PREV each frame
let currentFieldAddr = CURR_FIELD_BUFFER // Currently being decoded
let prevFieldAddr = PREV_FIELD_BUFFER // Previous field for temporal prediction
let nextFieldAddr = NEXT_FIELD_BUFFER // Next field for temporal prediction
function rotateFieldBuffers() {
// Rotate buffers: NEXT -> CURRENT -> PREV
let temp = prevFieldAddr
prevFieldAddr = currentFieldAddr
currentFieldAddr = nextFieldAddr
nextFieldAddr = temp
}
// Main decoding loop - simplified for performance
try {
let t1 = sys.nanoTime()
@@ -583,7 +605,20 @@ try {
try {
let decodeStart = sys.nanoTime()
let decodingHeight = isInterlaced ? (height / 2)|0 : height
graphics.tevDecode(blockDataPtr, CURRENT_RGB_ADDR, PREV_RGB_ADDR, width, decodingHeight, [qualityY, qualityCo, qualityCg], frameCount, debugMotionVectors, version, isInterlaced, TEMP_FIELD_BUFFER, PREV_FIELD_BUFFER)
if (isInterlaced) {
// For interlaced: decode current frame into currentFieldAddr
// For display: use prevFieldAddr as current, currentFieldAddr as next
graphics.tevDecode(blockDataPtr, nextFieldAddr, currentFieldAddr, width, decodingHeight, [qualityY, qualityCo, qualityCg], frameCount, debugMotionVectors, version)
graphics.tevDeinterlace(frameCount, width, decodingHeight, prevFieldAddr, currentFieldAddr, nextFieldAddr, CURRENT_RGB_ADDR)
// Rotate field buffers for next frame: NEXT -> CURRENT -> PREV
rotateFieldBuffers()
} else {
// Progressive or first frame: normal decoding without temporal prediction
graphics.tevDecode(blockDataPtr, CURRENT_RGB_ADDR, PREV_RGB_ADDR, width, decodingHeight, [qualityY, qualityCo, qualityCg], frameCount, debugMotionVectors, version)
}
decodeTime = (sys.nanoTime() - decodeStart) / 1000000.0 // Convert to milliseconds
// Upload RGB buffer to display framebuffer with dithering
@@ -593,9 +628,19 @@ try {
// Defer audio playback until a first frame is sent
if (!audioFired) {
audio.play(0)
audioFired = true
if (isInterlaced) {
// fire audio after frame 1
if (!audioFired && frameCount > 0) {
audio.play(0)
audioFired = true
}
}
else {
// fire audio after frame 0
if (!audioFired) {
audio.play(0)
audioFired = true
}
}
} catch (e) {
serial.println(`Frame ${frameCount}: Hardware ${colorSpace} decode failed: ${e}`)
@@ -674,8 +719,9 @@ finally {
if (blockDataPtr > 0) sys.free(blockDataPtr)
if (RGB_BUFFER_A > 0) sys.free(RGB_BUFFER_A)
if (RGB_BUFFER_B > 0) sys.free(RGB_BUFFER_B)
if (TEMP_FIELD_BUFFER > 0) sys.free(TEMP_FIELD_BUFFER)
if (CURR_FIELD_BUFFER > 0) sys.free(CURR_FIELD_BUFFER)
if (PREV_FIELD_BUFFER > 0) sys.free(PREV_FIELD_BUFFER)
if (NEXT_FIELD_BUFFER > 0) sys.free(NEXT_FIELD_BUFFER)
audio.stop(0)
audio.purgeQueue(0)