Thomas Demirdjian
60 lines
2.1 KiB
JavaScript
60 lines
2.1 KiB
JavaScript
export const MAX_SYNC_OFFSET_MS = 2000
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export const SYNC_OFFSET_STEP_MS = 50
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const toFiniteNumber = (value) => {
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const numericValue = Number(value ?? 0)
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return Number.isFinite(numericValue) ? numericValue : 0
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}
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export const clampSyncOffsetMs = (value, maxOffsetMs = MAX_SYNC_OFFSET_MS) => {
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const safeMax = Math.max(0, toFiniteNumber(maxOffsetMs))
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const safeValue = toFiniteNumber(value)
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return Math.min(safeMax, Math.max(-safeMax, safeValue))
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}
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export const snapSyncOffsetMs = (
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value,
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stepMs = SYNC_OFFSET_STEP_MS,
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maxOffsetMs = MAX_SYNC_OFFSET_MS
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) => {
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const safeStep = Math.max(1, Math.round(toFiniteNumber(stepMs) || 1))
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const clampedValue = clampSyncOffsetMs(value, maxOffsetMs)
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return clampSyncOffsetMs(Math.round(clampedValue / safeStep) * safeStep, maxOffsetMs)
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}
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export const getSyncTrimMs = (syncOffsetMs = 0) => {
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const safeOffsetMs = clampSyncOffsetMs(syncOffsetMs)
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return {
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audioTrimMs: safeOffsetMs < 0 ? Math.abs(safeOffsetMs) : 0,
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videoTrimMs: safeOffsetMs > 0 ? safeOffsetMs : 0,
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}
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}
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export const getTimelinePositionMs = (audioPositionMs = 0, syncOffsetMs = 0) => {
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const { audioTrimMs } = getSyncTrimMs(syncOffsetMs)
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return Math.max(0, toFiniteNumber(audioPositionMs) - audioTrimMs)
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}
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export const getTimelineDurationMs = (audioDurationMs = 0, syncOffsetMs = 0) => {
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const { audioTrimMs } = getSyncTrimMs(syncOffsetMs)
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return Math.max(0, toFiniteNumber(audioDurationMs) - audioTrimMs)
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}
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export const getAudioPositionMs = (timelinePositionMs = 0, syncOffsetMs = 0) => {
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const { audioTrimMs } = getSyncTrimMs(syncOffsetMs)
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return Math.max(0, toFiniteNumber(timelinePositionMs) + audioTrimMs)
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}
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export const getVideoPositionMs = (timelinePositionMs = 0, syncOffsetMs = 0) => {
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const { videoTrimMs } = getSyncTrimMs(syncOffsetMs)
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return Math.max(0, toFiniteNumber(timelinePositionMs) + videoTrimMs)
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}
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export const formatSyncOffsetMs = (value) => {
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const safeValue = snapSyncOffsetMs(value)
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if (safeValue === 0) return '0 ms'
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return `${safeValue > 0 ? '+' : ''}${safeValue} ms`
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}
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export const toSyncOffsetSeconds = (value) => clampSyncOffsetMs(value) / 1000
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