Contents

withAudioBufferList(blockBufferMemoryAllocator:flags:body:)

Calls a closure with an audio buffer list that contains the data from a sample buffer and a block buffer backing the audio buffers.

Declaration

func withAudioBufferList<R>(blockBufferMemoryAllocator: CFAllocator? = kCFAllocatorDefault, flags: CMSampleBuffer.Flags = [], body: (UnsafeMutableAudioBufferListPointer, CMBlockBuffer) throws -> R) throws -> R

Parameters

  • blockBufferMemoryAllocator:

    An allocator to use for the memory block held by a Cmblockbuffer Api.

  • flags:

    Optional flags that control the operation.

  • body:

    A closure the system calls that contains a pointer to an Audiobufferlist and the block buffer that backs its audio buffers.

Discussion

The system may not copy the data, depending on its contiguity and 16-byte alignment. It guarantees the buffers it places in the AudioBufferList are contiguous.

The system returns 16-byte-aligned buffers if you pass the audioBufferListAssure16ByteAlignment flag.

See Also

Modifying Sample Buffers