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Laurence Hobden

I've been creating some custom max externals with the Max SDK and have run into an issue where an external compiled on an M4 Mac Mini doesn't work on an M1 MacBook Pro. Max recognises the external on the MacBook, but when I add it to the canvas, I get a "wrong architecture" message and the block is yellowed out.

Is there a way to compile an external that works on both? Is there a CMake setting I've missed? Or something I need to manually change in Xcode?

Hi there,

I've been creating some custom max externals with the Max SDK and have run into an issue where an external compiled on an M4 Mac...

max-sdk-compiling-for-m1-and-m4-macos

Max SDK compiling for M1 and M4 MacOS

Shakeeb Alireza

It currently has one external (chuck~) with the following features:

- Generate and process audio via an embedded chuck engine by running chuck files with `global` parameters adjusted and controlled in realtime via Max messages.

- Layer sounds by running multiple chuck files concurrently.

- Add and remove audio and audio processes on the fly via Max messages.

The project's repo is: https://github.com/shakfu/chuck-max

While this is not a release yet of the external itself, the repo contains all of the external's dependencies and is very straightforward to compile using the standard Max SDK build system.

 external for Max 5. The chuck and Max apis have changed considerably since then, so a minimal rewrite was necessary with a view to incorporating some of the original external's features eventually.

chuck-max is a project to  embed the chuck engine in a Max/MSP external.
It currently has one external (chuck~) with the following ... 

chuck-max-a-new-project-to-develop-a-maxmsp-external-with-an-embedded-chuck-engine

chuck-max: a Max/MSP external with an embedded  chuck engine

Joe Kaplan

If you've worked with Min Devkit enough to recognize how awesome it is, you might also have run into a few of its limitations when working with Max's more advanced features such as dictionaries, notifications, UI objects, etc.

Min Devkit is a wrapper around Max SDK, and in fact, the entire Max SDK Base is included in the min-api folder.  Mixing and matching Min Devkit and Max SDK takes some care.  There are also  a few essential, undocumented, setup components that need to be addressed before you're able to do anything substantial here.  The notes below are assembled from my learnings across several threads in this forum.  Thanks especially to 11OLSEN and Rob Ramirez for all the support.

Two Methods for Using Max SDK in Min Devkit Projects

1)  Call Max SDK Functions in Min Devkit Source Code

If you want to use a feature of the Max SDK that isn't fully implement in Min, you can call any Max SDK function by prefixing it with c74::max.  For example: c74::max::object_notify().

Follow these suggestions and you should be able to leverage most of the Max features supported by MaxSDK inside MinDevkit.

2)  Create a Max SDK Object in a Min Devkit Solution

Sometimes calling a few Max SDK functions inside a Min object is not sufficient.  Min's support for UI Objects is either incomplete, incompletely documented, or both.  You might run into something that can be done in Max SDK that is very difficult to achieve in Min (textfields  are a good example).   In this case it can be easier just to build a Min SDK object and include it  in your MinDevkit package.

There are probably a few ways to do this. Below is my preferred solution:

1) Create a new Min Object the way you normally would.

2) Delete the contents of the source file.

3) Replace the contents of the source file with well-formed Max SDK source code.  Ideally, paste in an entire example from the Max-SDK.

4)  Somewhere early in the ext_main function you will find the line where class_new() creates the class.

In the simplemax example from Max SDK it looks like this:

c = class_new("simplemax", (method)simplemax_new, (method)simplemax_free,  ....

The first argument, the string in quotes, needs to match the name of your file.  So if your source file is "MyNewObject.cpp" then the first argument of class_new() should be "MyNewObject". eg:

c = class_new("MyNewObject", (method)simplemax_new, (method)simplemax_free,  ...

You can replace the name of your template (in this case, simplemax) throughout the code, but the only one that matter is the first argument of class_new().  If you don't do this, your object will appear red in Max and there will be no indicator as to why.

5)  You could stop here, but it's possible to go a step further.  Delete all the includes from the top of the file.  Replace them with: 

Now we are literally running Max SDK inside of Min.  We could even call Min functions inside it using the  c74::min:: prefix.  (Very cool in theory, use in practice at your own risk)

Most importantly, the new Max SDK object is running entirely on modern C++ which means you get access to the C++ standard libraries and any third party C++ libs you want to use.

The same concern about common symbols applies.  Be sure to include 

 in your cmakelists.txt as described above.

. Include this as well using the same method.

Your cmakelists.txt for a Min object that uses Max SDK to create a UI Object should have the following:

	${MAX_SDK_INCLUDES}/common/jpatcher_syms.c

Armed with this, you should be able achieve anything Max SDK is capable of inside a Min Devkit Package.

I hope this is helpful to someone.  I offer it as gratitude to the folks who helped me figure this stuff out.

Hi all,

If you've worked with Min Devkit enough to recognize how awesome it is, you might also have run into a few of its limitations when...

using-max-sdk-in-min-devkit-projects-a-how-to-guide

Using Max SDK in MIN Devkit Projects:  A How To Guide

Connector

I still did not get an answer to my question so i try to edit my original post for better understanding and reproducing my Problem to hopefully some hints to my issue:

I am writing an jitter external for Max 9.0.8 with max-sdk-8.2.0:

max.testexternal.c.txt

testexternal.c.txt

Inside the external i am filling a 2x2x3 matrix and storing the matrix to brightnessTest.jxf in the Filesystem. After reading back into a matrix object i want to get the stored Values back in a jitter Patch. 

Testexternal.maxpat

 While storing the values to the matrix with this code: 

for (x->currentframe = 0; x->currentframe < 3; x->currentframe++) {
    for (i = 0; i < x->nrOfCells; i++) {
        yCellPos = i / x->cols;
        xCellPos = i % x->cols;

        brightness = 25. * i;
        post("i: %ld", i);
        post("x->currentframe: %ld, xPos: %ld, yPos: %ld", x->currentframe, xCellPos, yCellPos);
        post("brightness: %f", brightness);

        brightnessp = brightness_bp  
            + xCellPos * sizeof(float) 
            + yCellPos * sizeof(float) * (&brightness_minfo)->dim[0]
            + x->currentframe * sizeof(float) * (&brightness_minfo)->dim[0] * (&brightness_minfo)->dim[1];
        *brightnessp = brightness;

    }
}

The output to console looks fine (frames 0,1,2 are filled with values):

But when i try to read back the matrix values in the patch

it seems that only the first frame (frames 0) was read back correctly. At the second frame (frames 1) i only get 0. Values and the third frame (frames 2) i get no Values.

Hope anyone could give me a hint to solve my problem. 

I still did not get an answer to my question so i try to edit my original post for better understanding and reproducing my Problem to...

problem-with-writing-a-matrix-to-jxf-file-and-reading-it-back-to-jitter

Problem with writing a matrix to jxf File and reading it back to Jitter

I've built a cool object with MinDevkit with lots of functions, structs, and variables.  The file is getting pretty unwieldy.  I'd like to move a lot of this stuff to a separate header file, or ideally a  few separate header files.  So I can call my function inside the Message code, without loads and loads of preamble in the main object file.

But  with min devkit, we are essentially declaring a class, not defining one.  o basically what I'm trying to do is split a class declaration across multiple files.   Which is not great C++ style as far as I understand it.  I've tried a few different ways to hack this.  Some things can be externalized and some things can't, and the number of exceptions I'm encountering wind up fragmenting the code in confusing ways, which undermines the reason for doing this in the first place.

Any C++ Wizards know of a good way to take the entire private members section of class declaration and put it into a different file from the rest of the class?

I'd love to keep my main object file focused on attributes and messages and keep the gobs of preamble those messages depend on somewhere else.

Greetings,

I've built a cool object with MinDevkit with lots of functions, structs, and variables.  The file is getting pretty unwieldy. ...

Dev Forum