How can I access the JPEG COM segment in iOS?

Question

There are many levels of marker segment in JPEG, I want to read and write marker marker segment - COM (read / write). This requires low level programming. How can I access it in iOS?

Links -

• http://help.accusoft.com/ImageGear/v18.1/Mac/IGDLL-10-05.html
• https://www.npmjs.com/package/jpeg-com-segment
• http://www.sno.phy.queensu.ca/~phil/exiftool/

Answer 1

IOS allows you to open files. Read the JPEG file. Find the stream for the COM token. Read the length. Read the data. This is the main [objective] programming of C.