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https://github.com/curioustorvald/tsvm.git
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82 lines
2.4 KiB
JavaScript
82 lines
2.4 KiB
JavaScript
// playpcm — raw PCMu8 stereo player with the shared playgui visualiser.
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// Usage: playpcm <file.pcm> [-i]
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const fileHandle = files.open(_G.shell.resolvePathInput(exec_args[1]).full)
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const filePath = fileHandle.fullPath
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const interactive = exec_args[2] && exec_args[2].toLowerCase() === "-i"
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const pcm = require("pcm")
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const seqread = require("seqread")
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const gui = interactive ? require("playgui") : null
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const FILE_SIZE = files.open(filePath).size
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let BLOCK_SIZE = 4096
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const INFILE_BLOCK_SIZE = BLOCK_SIZE
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const QUEUE_MAX = 8
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const samplingRate = pcm.HW_SAMPLING_RATE
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const byterate = 2 * samplingRate
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function bytesToSec(i) { return i / byterate }
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seqread.prepare(filePath)
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const readPtr = sys.malloc(BLOCK_SIZE)
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audio.resetParams(0)
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audio.purgeQueue(0)
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audio.setPcmMode(0)
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audio.setMasterVolume(0, 255)
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if (interactive) {
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gui.audioInit({
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title: `${fileHandle.name} Raw PCM 32kHz Stereo`,
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tag: "PCM"
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})
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}
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let stopPlay = false
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let errorlevel = 0
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let readLength = 1
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try {
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while (!stopPlay && seqread.getReadCount() < FILE_SIZE && readLength > 0) {
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if (interactive && gui.audioIsExitRequested()) { stopPlay = true; break }
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const queueSize = audio.getPosition(0)
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if (queueSize <= 1) {
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for (let repeat = QUEUE_MAX - queueSize; repeat > 0; repeat--) {
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const remainingBytes = FILE_SIZE - seqread.getReadCount()
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readLength = (remainingBytes < INFILE_BLOCK_SIZE) ? remainingBytes : INFILE_BLOCK_SIZE
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if (readLength <= 0) break
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seqread.readBytes(readLength, readPtr)
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// Raw PCMu8 stereo — sampleCount = bytes / 2.
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if (interactive) gui.audioFeedPcm(readPtr, readLength >> 1)
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audio.putPcmDataByPtr(0, readPtr, readLength, 0)
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audio.setSampleUploadLength(0, readLength)
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audio.startSampleUpload(0)
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if (repeat > 1) sys.sleep(10)
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}
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audio.play(0)
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}
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if (interactive) {
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const cur = seqread.getReadCount()
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gui.audioSetProgress(cur / FILE_SIZE, bytesToSec(cur), bytesToSec(FILE_SIZE))
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gui.audioRender()
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}
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sys.sleep(10)
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}
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} catch (e) {
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printerrln(e)
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errorlevel = 1
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} finally {
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if (readPtr !== undefined) sys.free(readPtr)
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if (interactive) gui.audioClose()
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}
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return errorlevel
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