INNER CODE UNIT · Kotlin

ADTS_SIZE

pedroSG94/RootEncoder · common/src/main/java/com/pedro/common/AudioUtils.kt:6

    const val ADTS_SIZE = 7 //Never use crc (with crc the size is 9)

    fun createAdtsHeader(type: Int, length: Int, sampleRate: Int, channels: Int): ByteBuffer {
        val header = ByteArray(ADTS_SIZE)

        header[0] = 0xFF.toByte()
        header[1] = 0xF1.toByte()
        header[2] = (((type - 1) shl 6) or (getFrequency(sampleRate) shl 2) or (channels shr 2)).toByte()
        header[3] = (((channels and 3) shl 6) or (length shr 11)).toByte()
        header[4] = ((length and 0x7FF) shr 3).toByte()
        header[5] = (((length and 7) shl 5).toByte()).plus(0x1F).toByte()
        header[6] = 0xFC.toByte()
        return ByteBuffer.wrap(header)
    }

    fun getFrequency(sampleRate: Int): Int {
        var frequency = AUDIO_SAMPLING_RATES.indexOf(sampleRate)
        //sane check, if sample rate not found using default 44100

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