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# AVAudioCompressedBuffer

An object that represents an audio buffer that you use for compressed audio formats.

```
class AVAudioCompressedBuffer
```

## Topics

### Creating an Audio Buffer

[`init(format:packetCapacity:)`](/documentation/AVFAudio/AVAudioCompressedBuffer/init(format:packetCapacity:))

Creates a buffer that contains constant bytes per packet of audio data in a compressed state.

[`init(format:packetCapacity:maximumPacketSize:)`](/documentation/AVFAudio/AVAudioCompressedBuffer/init(format:packetCapacity:maximumPacketSize:))

Creates a buffer that contains audio data in a compressed state.

### Getting Audio Buffer Properties

[`byteCapacity`](/documentation/AVFAudio/AVAudioCompressedBuffer/byteCapacity)

The number of packets the buffer contains.

[`byteLength`](/documentation/AVFAudio/AVAudioCompressedBuffer/byteLength)

The number of valid bytes in the buffer.

[`data`](/documentation/AVFAudio/AVAudioCompressedBuffer/data)

The audio buffer’s data bytes.

[`maximumPacketSize`](/documentation/AVFAudio/AVAudioCompressedBuffer/maximumPacketSize)

The maximum size of a packet, in bytes.

[`packetCapacity`](/documentation/AVFAudio/AVAudioCompressedBuffer/packetCapacity)

The total number of packets that the buffer can contain.

[`packetCount`](/documentation/AVFAudio/AVAudioCompressedBuffer/packetCount)

The number of packets currently in the buffer.

[`AVAudioPacketCount`](/documentation/AVFAudio/AVAudioPacketCount)

The number of packets of audio data.

[`packetDescriptions`](/documentation/AVFAudio/AVAudioCompressedBuffer/packetDescriptions)

The buffer’s array of packet descriptions.

[`packetDependencies`](/documentation/AVFAudio/AVAudioCompressedBuffer/packetDependencies-3a6ln)

The buffer’s array of packet dependencies.   

[`packetDependencies`](/documentation/AVFAudio/AVAudioCompressedBuffer/packetDependencies-5oae6)

The buffer’s array of packet dependencies.   


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