Handling unpresented files with NSDocument
Handling unpresented files with NSDocument
- Subject: Handling unpresented files with NSDocument
- From: "email@hidden" <email@hidden>
- Date: Wed, 03 Aug 2016 21:56:52 +0700
Hey everyone.
I’m writing a document-based audio-editor for macOS and have a problem with managing the user's audio files.
The app uses CoreAudio exclusively for everything audio related including reading and writing audio files to/from disk. When the user imports an audio file into the application (via drag and drop for example), it gets converted and written into the document’s filepackage by CoreAudio. The document doesn’t complain because I create file wrappers for each audio file when the my document’s fileWrapper(ofType:) function get’s called.
The audio files don’t get altered once they’re in the document-package. They're just there for CoreAudio to read. Also, combined they could get quite big. 500 GB of audio files for the biggest projects users might create is not unreasonable.
So these audio files are not managed by my NSDocument subclass (it only saves their url for CoreAudio). When duplicating the document or saving it to another location the audio files have to move, too. So I currently catch the related functions in my NSDocumentController subclass and move them manually. More wild problems and sketchy solutions occur and then there is the revert option and iCloud. I feel like I’m completely off-track here.
Is it possible for the NSDocument to know about the audio files in it’s package folder and handle them like they belong to it without wholly representing them in the model? Or can CoreData solve this? I think, however, that storing the audio data in anything other than actual audio files will massively complicate things with CoreAudio.
Can someone please point me in the right direction?
Thanks!
Max
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