TVIAudioSink Protocol Reference

Conforms to NSObject
Declared in TVIAudioSink.h


TVIAudioSink consumes raw audio content from a TVIAudioTrack.

– renderSample: required method

Render a single audio sample.

- (void)renderSample:(CMSampleBufferRef)audioSample



A CMSampleBufferRef which is being delivered to the sink. You should retain this if you need it outside of the scope of this method call.


Samples are delivered in a CMSampleBuffer which fully describes the format and timings of the audio. Please note that many audio frames are contained within a single CMSampleBuffer. Callbacks are raised at presentation time with an interval of 10 milliseconds. The CMSampleBuffers are suitable to pass to Apple APIs like AVAssetWriterInput, or SFSpeechAudioBufferRecognitionRequest. However, you should ensure that you process each sample in a real-time fashion. Holding on to seconds worth of audio will result in future samples being dropped.

Declared In