init(format:renderBlock:)
Creates an audio source node with the audio format and a block that supplies audio data.
Declaration
init(format: AVAudioFormat, renderBlock block: @escaping AVAudioSourceNodeRenderBlock)Parameters
- format:
The format of the pulse-code modulated (PCM) audio data the block supplies.
- block:
The block to supply audio data to the output.
Discussion
When connecting the audio source node to another node, the system uses the connection format to set the audio format for the output bus.
Depending on the audio engine’s operating mode, call the block on real-time or nonreal-time threads. When rendering to a device, avoid making blocking calls within the block.
AVAudioSourceNode supports different audio formats for the block and the output, but the system only supports linear PCM conversions with sample rate, bit depth, and interleaving.