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audio:short function to enqueue decoded mp2; playmov:no more choppy audio

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minjaesong
2023-01-21 19:43:11 +09:00
parent b60b5bada6
commit 99212adea3
7 changed files with 18 additions and 48 deletions
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46
assets/disk0/tvdos/bin/playmp2.js
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@@ -79,47 +79,7 @@ let bytes_left = FILE_SIZE
let decodedLength = 0
serial.println(`Frame size: ${FRAME_SIZE}`)
function decodeAndResample(inPtrL, inPtrR, outPtr, inputLen) {
// TODO resample
for (let k = 0; k < inputLen; k+=2) {
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) {
let t2 = sys.nanoTime()
// printdbg(`Audio queue size: ${audio.getPosition(0)}/${QUEUE_MAX}`)
if (audio.getPosition(0) >= QUEUE_MAX) {
while (audio.getPosition(0) >= (QUEUE_MAX >>> 1)) {
printdbg(`Queue full, waiting until the queue has some space (${audio.getPosition(0)}/${QUEUE_MAX})`)
sys.sleep(bufRealTimeLen)
}
}
// decodeAndResample(samplePtrL, samplePtrR, decodePtr, len)
audio.putPcmDataByPtr(decodePtr, len, 0)
audio.setSampleUploadLength(0, len)
audio.startSampleUpload(0)
sys.sleep(10)
let decodingTime = (t2 - t1) / 1000000.0
bufRealTimeLen = (len) / 64000.0 * 1000
t1 = t2
// println(`Decoded ${decodedLength} bytes; target: ${bufRealTimeLen} ms, lag: ${decodingTime - bufRealTimeLen} ms`)
}
//serial.println(`Frame size: ${FRAME_SIZE}`)
con.curs_set(0)
@@ -203,9 +163,7 @@ try {
sys.sleep(bufRealTimeLen)
}
}
audio.putPcmDataByPtr(SND_BASE_ADDR - 64, 2304, 0)
audio.setSampleUploadLength(0, 2304)
audio.startSampleUpload(0)
audio.mp2UploadDecoded(0)
sys.sleep(10)