keith

addmedia
addphoto
addvideo
appinfo
boot
bootstatus
clone
create
darwinup
delete

delasign

public func prepareWriterAndInput(size:CGSize, videoURL:URL, completionHandler:@escaping(Error?)->()) {
        
        do {
            self.assetWriter = try AVAssetWriter(outputURL: videoURL, fileType: AVFileType.mp4)
            
            // Input is the mic audio of the AVAudioEngine            
            let audioOutputSettings = [
                AVFormatIDKey : kAudioFormatMPEG4AAC,
                AVNumberOfChannelsKey : 2,
                AVSampleRateKey : 44100.0,

delasign

// MARK:  AUDIO FUNCTIONALITY
    var captureSession: AVCaptureSession?
    var micInput:AVCaptureDeviceInput?
    var audioOutput:AVCaptureAudioDataOutput?
    
    
    func startAudioRecording(completionHandler:@escaping(Bool) -> ()) {
        
        let microphone = AVCaptureDevice.default(.builtInMicrophone, for: AVMediaType.audio, position: .unspecified)
        

sabas1080

/*
  Copyright (c) 2014-2020 Electronic Cats SAPI de CV.  All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of

AdamLantz

//Swift 4 modifications for this gist: https://gist.github.com/krooked/9c4c81557fc85bc61e51c0b4f3301e6e
import Foundation
import UIKit

extension UIImage {
    func cropImageByAlpha() -> UIImage {
        let cgImage = self.cgImage
        let context = createARGBBitmapContextFromImage(inImage: cgImage!)
        let height = cgImage!.height
        let width = cgImage!.width

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

brennanMKE

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

dedeexe

extension URLRequest {
    
    public func curl(pretty:Bool = false) -> String {
        
        var data : String = ""
        let complement = pretty ? "\\\n" : ""
        let method = "-X \(self.httpMethod ?? "GET") \(complement)"
        let url = "\"" + self.url?.absoluteString ?? "" + "\""
        
        var header = ""

sticilface

Guide to PROGMEM on ESP8266 and Arduino IDE

Intro

On low memory devices like the arduino and esp8266 you do not want strings to be stored in RAM. This occurs by default on these systems. Declare a string const char * xyz = "this is a string" and it will use up RAM.

The solution on these devices is to allow strings to be stored in read only memory, in Arduino this is the PROGMEM macro. Most of my experience is with the ESP8266 which is a 32bit micros controller. This device stores PROGMEM data in flash. The macro PROGMEM on ESP8266 is simply

#define PROGMEM   ICACHE_RODATA_ATTR

simme

//
//  debounce-throttle.swift
//
//  Created by Simon Ljungberg on 19/12/16.
//  License: MIT
//

import Foundation

extension TimeInterval {