Ryan Rosello roselloryan
brennanMKE
/ ProcessBuffer.Swift
Last active
November 2, 2023 09:25
Process a CMSampleBuffer to modify the audio using an AVAssetReader and AVAssetWriter in Swift
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| func processSampleBuffer(scale: Float, sampleBuffer: CMSampleBuffer, writerInput: AVAssetWriterInput) -> Bool { | |
| guard let blockBuffer = CMSampleBufferGetDataBuffer(sampleBuffer) else { | |
| return false | |
| } | |
| let length = CMBlockBufferGetDataLength(blockBuffer) | |
| var sampleBytes = UnsafeMutablePointer<Int16>.allocate(capacity: length) | |
| defer { sampleBytes.deallocate(capacity: length) } | |
| guard checkStatus(CMBlockBufferCopyDataBytes(blockBuffer, 0, length, sampleBytes), message: "Copying block buffer") else { | |
| return false |