OpusUtil

const val MAX_BYTES_PER_SECOND = 63750: Int

Maximum achievable Opus bitrate.

const val SAMPLE_RATE = 48000: Int

Opus streams are always 48000 Hz.

java-static fun buildInitializationData(header: ByteArray!): (Mutable)List<ByteArray<Byte>!>!

Builds codec initialization data from an Opus Identification Header.

java-static fun getChannelCount(header: ByteArray!): Int

Parses the channel count from an Opus Identification Header.

java-static fun getPacketDurationUs(buffer: ByteArray!): Long

Returns the duration of the given audio packet.

java-static fun getPreSkipSamples(header: ByteArray!): Int

Returns the number of pre-skip samples specified by the given Opus codec initialization data.

java-static fun needToDecodeOpusFrame(startTimeUs: Long, frameTimeUs: Long): Boolean

Returns whether an Opus frame should be sent to the decoder as it is either past the start position or within the seek-preroll duration.

The measure of whether an Opus frame should not be decoded is if its time precedes the start position by more than the default seek-preroll value.

java-static fun parseOggPacketAudioSampleCount(buffer: ByteBuffer!): Int

Returns the number of audio samples in the given Ogg encapuslated Opus packet.

The buffer's position is not modified.

java-static fun parseOggPacketForPreAudioSampleByteCount(buffer: ByteBuffer!): Int

Calculate the offset from the start of the buffer to audio sample Ogg packets.

java-static fun parsePacketAudioSampleCount(buffer: ByteBuffer!): Int

Returns the number of audio samples in the given audio packet.

The buffer's position is not modified.