CMOS Camera SDK on macOS -- Trouble with My First SDK Integration

extend
#1

Hello, I usually get along pretty well with oF but I am finding myself out of my depth in this case.

Camera SDK

I am trying to use the SDK for a CMOS camera made by ZWO. The SDK comes from the ZWO website and (spoiler alert) the contents are:

demo/
	bin/
		x86/
			main_SDK2_video_mac
			test_gui2_snap
			test_gui2_video
		main_SDK2_snap.cpp
		main_SDK2_video_mac.cpp
		main_SDK2_video.cpp
	Makefile
	readme.txt
doc/
	ASICamera2 Software Development Kit.pdf
include/
	ASICamera2.h
lib/
	armv6/
		libASICamera2.a
		libASICamera2.so
		libASICamera2.so.1.16.3
	armv7/
		libASICamera2.a
		libASICamera2.so
		libASICamera2.so.1.16.3
	armv8/
		libASICamera2.a
		libASICamera2.so
		libASICamera2.so.1.16.3
	asi.rules
	mac/
		libASICamera2.a
		libASICamera2.dylib
		libASICamera2.dylib.1.16.3
	README.txt
	x64/
		libASICamera2.a
		libASICamera2.so
		libASICamera2.so.1.16.3
	x86/
		libASICamera2.a
		libASICamera2.so
		libASICamera2.so.1.16.3
license.txt

My Attempts

There might be some holes in this because I worked on a bulk of it last week. I’ve also looked through the SDK examples, etc., but I’m still writing this post so the docs weren’t that helpful for me. I took some guidance from a few places but this is the only source I still have around.

Add Directly to Project

I brought ASICamera2.h into my project, imported that header file into a CPP file, and code completion seems to work as expected. In my target settings I added the macos folder from the SDK to Link Binary With Libraries list. I have also tried other variations like adding a higher-lever folder, adding each of the system folders with the *.a and *.so files, and just adding the *.a file(s).

As Addon

I also tried doing approximately the same process by modifying an empty add-on template, adding it with projectGenerator.

Error

Add Directly to Project

When I Build for My Mac (an M1) the main issue seems to be ld: symbol(s) not found for architecture x86_64. When I Build for My Mac (Rosetta) I am currently getting the same error but I thought that last week it showed just ...x86 (or was it ...x64? I know I should know, but, ugh).

As Addon

I don’t recall what happened and I have so little faith in my work there that I won’t bother re-creating unless this seems like this is where the answer lies.

#2

Hi,

Based on that file list the only file you would want to add to your project is:
mac/libASICamera2.a

Add the relative path of the file from your xcodeproj file location to the libASICamera2.a to the Debug and Release section here ( add a line with the + symbol below $(LIB_OF_DEBUG) ):

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If you are having issues figuring out if the path is correct you could even add the absolute file path.

Also if you need to check the architecture of the file ( to make sure it is x86_64 ) you can do:
lipo -i libASICamera2.a

Hope that helps!
Theo

#3

Seems like I was trying to take the long way around the mountain! But it’s not fixed yet… Following your directions:

The mac version of libASICamera2.a shows it’s for i386 x86_64 while running lipo on any of the others returns archive with no architecture specification. When I build now the error has changed to ld: symbol(s) not found for architecture arm64.

When I build for Rosetta (thinking it might get away from arm64) it has the original ld: symbol(s) not found for architecture x86_64 and messages like Object file (libASICamera2.a(Camera.o)) was built for newer macOS version (10.13) than being linked (10.9).

Should I be trying to limit the architectures it builds for or am I hosed? I have my 2015 MBP around somewhere if I need to get back to Intel.

#4

That makes sense. ( the arm64 part ).
I think maybe start in Rosetta mode. Check you have build active architectures only set to YES for both Debug and Release ( in build settings ).

Then either add the file path to the other linker flags for Debug and Release.

Or you could also drag and drop the file into the sidebar ( where your source files are listed ) and it should automatically link the file in the link binary with libraries build phase.

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It should definitely link as long as you are not trying to build for arm64 natively.

Edit: the warning was built for newer macOS version (10.13) than being linked (10.9). can be ignored as long as it is not an error.

#5

This seemed to have fixed some things. The only errors I see now are about Undefined symbols for x86_64 related to libusb.

Things I know or did:

  • libusb is already installed with Homebrew
  • I unlinked and linked with homebrew
  • I tried (maybe recklessly) /bin/launchctl setenv LIBRARY_PATH /usr/local/lib
  • I tried (maybe recklessly) gcc -L/usr/local/Cellar/libusb/1.0.24/lib -o "libusb_example" ./src/libusb_example.o -lusb1.0 but the file was not found

Thank you SO much for the help!

#6

You could grab and link the libusb from ofxKinect which I think should be pretty compatibile.
Just use the PG to add ofxKinect to your project ( maybe a clean project as it will trash your other settings ) or just manually add the .a like you did for the camera library.

If that libusb is missing 3.0 stuff
the one here should be good: https://github.com/ofTheo/ofxKinectV2/tree/master/libs/libusb

#7

It’s building!! Now to figure out the API, but it seems like we’re in business.

#8

I did have to grab the newer libusb that you linked to