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 |
xueyongwei
/ PSPDFUIKitMainThreadGuard.m
Created
February 23, 2017 11:59
— forked from steipete/PSPDFUIKitMainThreadGuard.m
This is a guard that tracks down UIKit access on threads other than main. This snippet is taken from the commercial iOS PDF framework http://pspdfkit.com, but relicensed under MIT. Works because a lot of calls internally call setNeedsDisplay or setNeedsLayout. Won't catch everything, but it's very lightweight and usually does the job.You might n…
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| // Taken from the commercial iOS PDF framework http://pspdfkit.com. | |
| // Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved. | |
| // Licensed under MIT (http://opensource.org/licenses/MIT) | |
| // | |
| // You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it. | |
| // PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit. | |
| #import <objc/runtime.h> | |
| #import <objc/message.h> |