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audio: getFreePlayhead()

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minjaesong
2026-06-07 02:21:21 +09:00
parent 3444bdf63b
commit aa45c2194f
11 changed files with 124 additions and 81 deletions
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28
assets/disk0/tvdos/bin/playmv1.js
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@@ -97,10 +97,14 @@ let startTime = sys.nanoTime()
let framesRead = 0
let audioFired = false
audio.resetParams(0)
audio.purgeQueue(0)
audio.setPcmMode(0)
audio.setMasterVolume(0, 255)
// Occupy the first idle playhead rather than always grabbing #0, so playback
// doesn't cut off audio already running on another playhead. Falls back to #0
// when all four are busy.
const PLAYHEAD = audio.getFreePlayhead(0)
audio.resetParams(PLAYHEAD)
audio.purgeQueue(PLAYHEAD)
audio.setPcmMode(PLAYHEAD)
audio.setMasterVolume(PLAYHEAD, 255)
function s16StTou8St(inPtrL, inPtrR, outPtr, length) {
for (let k = 0; k < length; k+=2) {
@@ -204,7 +208,7 @@ while (!stopPlay && seqread.getReadCount() < FILE_LENGTH) {
// defer audio playback until a first frame is sent
if (!audioFired) {
audio.play(0)
audio.play(PLAYHEAD)
audioFired = true
}
@@ -263,7 +267,7 @@ while (!stopPlay && seqread.getReadCount() < FILE_LENGTH) {
// defer audio playback until a first frame is sent
if (!audioFired) {
audio.play(0)
audio.play(PLAYHEAD)
audioFired = true
}
@@ -326,9 +330,9 @@ while (!stopPlay && seqread.getReadCount() < FILE_LENGTH) {
// RAW PCM packets (decode on the fly)
else if (packetType == 0x1000 || packetType == 0x1001) {
let frame = seqread.readBytes(readLength)
audio.putPcmDataByPtr(0, frame, readLength, 0)
audio.setSampleUploadLength(0, readLength)
audio.startSampleUpload(0)
audio.putPcmDataByPtr(PLAYHEAD, frame, readLength, 0)
audio.setSampleUploadLength(PLAYHEAD, readLength)
audio.startSampleUpload(PLAYHEAD)
sys.free(frame)
}
else {
@@ -382,14 +386,14 @@ finally {
if (AUDIO_QUEUE_BYTES > 0 && AUDIO_QUEUE_LENGTH > 1) {
}
//audio.stop(0)
//audio.stop(PLAYHEAD)
let timeTook = (endTime - startTime) / 1000000000.0
//println(`Actual FPS: ${framesRendered / timeTook}`)
audio.stop(0)
audio.purgeQueue(0)
audio.stop(PLAYHEAD)
audio.purgeQueue(PLAYHEAD)
if (interactive) {
con.clear()