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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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20
assets/disk0/tvdos/bin/playtad.js
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@@ -109,13 +109,17 @@ function bytesToSec(i) {
return Math.round((i / FILE_SIZE) * (FILE_SIZE / AVG_CHUNK_SIZE) * (bufRealTimeLen / 1000))
}
audio.resetParams(0)
audio.purgeQueue(0)
audio.setPcmMode(0)
audio.setPcmQueueCapacityIndex(0, 2)
const QUEUE_MAX = audio.getPcmQueueCapacity(0)
audio.setMasterVolume(0, 255)
audio.play(0)
// 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.setPcmQueueCapacityIndex(PLAYHEAD, 2)
const QUEUE_MAX = audio.getPcmQueueCapacity(PLAYHEAD)
audio.setMasterVolume(PLAYHEAD, 255)
audio.play(PLAYHEAD)
if (interactive) {
gui.audioInit({
@@ -163,7 +167,7 @@ try {
filebuf.readBytes(7 + payloadSize, TAD_INPUT_ADDR)
audio.tadDecode()
audio.tadUploadDecoded(0, sampleCount)
audio.tadUploadDecoded(PLAYHEAD, sampleCount)
// After upload tadDecodedBin still holds the chunk until the next
// tadDecode call, so it's safe to keep slicing samples out of it
// during the playback wait below.