_recordFormat.mSampleRate = sampeleRate // sampleRate] Sampling rate means the number of frames that need to be collected per second Set the sampling rate, here first get the system default test//TODO: Memset(&_recordFormat, 0, sizeof(_recordFormat)) (void)setupAudioFormat:(UInt32) inFormatID SampleRate:(int)sampeleRate The implementation code is as follows: (recording part) If you are still not familiar with Audio Queues, you can refer to the blog of this awesome person: The implementation principle of Audio Queues is not described in detail here, but the code is mainly discussed.
Use case: Need to get real-time PCM recording data or need to use real-time PCM audio data to play.Ģ.
AVRECORDER WRITE TO BUFFER MAC OS
(2) In iOS and Mac OS X, Audio Queues is a software object used to record and play audio, that is, it can be used for recording and playback, and recording can obtain real-time PCM raw audio data. This has caused great limitations to the application.Īpplicable occasions: when there is no need to process audio in real time, such as recording memos. Although the usage is relatively simple, it does not support streaming this means: before playing the audio, you must wait until the entire audio is loaded before you can start playing the audio when recording, you must wait until the end of the recording to get the recording data. (1) Apple recommends that we use the AVAudioPlayer and AVAudioRecorder classes in the AVFoundation framework. Apple’s recording is more troublesome than Android’s. The first project I received for learning iOS requires real-time recording, so I also came into contact with Audio Queues.
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