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mov: mp2 audio encoding and playing

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minjaesong
2023-01-18 18:05:34 +09:00
parent dfe5bf3390
commit 6d19543139
4 changed files with 188 additions and 62 deletions
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10
assets/disk0/tvdos/bin/playmp2.js
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@@ -82,12 +82,10 @@ let decodedLength = 0
function decodeAndResample(inPtrL, inPtrR, outPtr, inputLen) {
// TODO resample
for (let k = 0; k < inputLen; k+=2) {
let sample = [
pcm.u16Tos16(sys.peek(inPtrL + k + 0) | (sys.peek(inPtrL + k + 1) << 8)),
pcm.u16Tos16(sys.peek(inPtrR + k + 0) | (sys.peek(inPtrR + k + 1) << 8))
]
sys.poke(outPtr + k, pcm.s16Tou8(sample[0]))
sys.poke(outPtr + k + 1, pcm.s16Tou8(sample[1]))
let sample1 = pcm.u16Tos16(sys.peek(inPtrL + k + 0) | (sys.peek(inPtrL + k + 1) << 8))
let sample2 = pcm.u16Tos16(sys.peek(inPtrR + k + 0) | (sys.peek(inPtrR + k + 1) << 8))
sys.poke(outPtr + k, pcm.s16Tou8(sample1))
sys.poke(outPtr + k + 1, pcm.s16Tou8(sample2))
}
}
function decodeEvent(frameSize, len) {