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import { getMediaSource } from './mediasource-helper'; // from http://mp4ra.org/codecs.html const sampleEntryCodesISO = { audio: { a3ds: true, 'ac-3': true, 'ac-4': true, alac: true, alaw: true, dra1: true, 'dts+': true, 'dts-': true, dtsc: true, dtse: true, dtsh: true, 'ec-3': true, enca: true, g719: true, g726: true, m4ae: true, mha1: true, mha2: true, mhm1: true, mhm2: true, mlpa: true, mp4a: true, 'raw ': true, Opus: true, opus: true, // browsers expect this to be lowercase despite MP4RA says 'Opus' samr: true, sawb: true, sawp: true, sevc: true, sqcp: true, ssmv: true, twos: true, ulaw: true, }, video: { avc1: true, avc2: true, avc3: true, avc4: true, avcp: true, av01: true, drac: true, dva1: true, dvav: true, dvh1: true, dvhe: true, encv: true, hev1: true, hvc1: true, mjp2: true, mp4v: true, mvc1: true, mvc2: true, mvc3: true, mvc4: true, resv: true, rv60: true, s263: true, svc1: true, svc2: true, 'vc-1': true, vp08: true, vp09: true, }, text: { stpp: true, wvtt: true, }, }; const MediaSource = getMediaSource(); export type CodecType = 'audio' | 'video'; export function isCodecType(codec: string, type: CodecType): boolean { const typeCodes = sampleEntryCodesISO[type]; return !!typeCodes && typeCodes[codec.slice(0, 4)] === true; } export function isCodecSupportedInMp4(codec: string, type: CodecType): boolean { return ( MediaSource?.isTypeSupported(`${type || 'video'}/mp4;codecs="${codec}"`) ?? false ); }