Jean-Michaël Celerier

Hello !
I'm trying to debug a memory issue in an external. My go-to tool for this in normal C++ code is using the compiler's -fsanitize=address / -fsanitize=undefined feature.

If I just compile my external with asan, when I load it I immediately get the error message:


==81381==ERROR: Interceptors are not working. This may be because AddressSanitizer is loaded too late (e.g. via dlopen). Please launch the executable with:
DYLD_INSERT_LIBRARIES=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib

So I do what the error message asks me to, but now Max itself crashes as soon as it starts up... is there any way to get things to work?


-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               Max [81446]
Path:                  /Applications/Max.app/Contents/MacOS/Max
Identifier:            com.cycling74.Max
Version:               8.3.3 (6f7f6680766) (8.3.3)
Code Type:             X86-64 (Native)
Parent Process:        zsh [63572]
Responsible:           iTerm2 [514]
User ID:               501

Date/Time:             2022-10-19 11:40:04.3980 -0400
OS Version:            macOS 12.5.1 (21G83)
Report Version:        12
Bridge OS Version:     6.6 (19P6066)
Anonymous UUID:        B54FFD31-C3CA-FD9C-6D55-A99EF72D6C93


Time Awake Since Boot: 930000 seconds

System Integrity Protection: disabled

Crashed Thread:        0  CrBrowserMain  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BREAKPOINT (SIGTRAP)
Exception Codes:       0x0000000000000002, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Reason:    Namespace SIGNAL, Code 5 Trace/BPT trap: 5
Terminating Process:   exc handler [81446]

Thread 0 Crashed:: CrBrowserMain Dispatch queue: com.apple.main-thread
0   Chromium Embedded Framework   	       0x12c153c28 base::mac::CxxPersonalityRoutine(int, _Unwind_Action, unsigned long long, _Unwind_Exception*, _Unwind_Context*) + 47880
1   Chromium Embedded Framework   	       0x12c153965 base::mac::CxxPersonalityRoutine(int, _Unwind_Action, unsigned long long, _Unwind_Exception*, _Unwind_Context*) + 47173
2   libsystem_malloc.dylib        	    0x7ff801a12abb _malloc_zone_malloc + 125
3   libsystem_malloc.dylib        	    0x7ff801a014e8 malloc_set_zone_name + 334
4   libclang_rt.asan_osx_dynamic.dylib	       0x106d16dea wrap_malloc_set_zone_name + 218
5   libdispatch.dylib             	    0x7ff801a24317 _dispatch_client_callout + 8
6   libdispatch.dylib             	    0x7ff801a254fa _dispatch_once_callout + 20
7   QuartzCore                    	    0x7ff808ec669f get_malloc_zone() + 44
8   QuartzCore                    	    0x7ff808d51803 CA::Transaction::push(bool) + 53
9   AppKit                        	    0x7ff804728c12 NSPerformVisuallyAtomicChange + 95
10  AppKit                        	    0x7ff804825d67 -[NSPersistentUIRestorer resumeNormalWindowOrderingAndDrawing] + 66
11  AppKit                        	    0x7ff804825c53 -[NSPersistentUIRestorer tearDownStateRestorationApparatusAndResumeWindowOrdering] + 54
12  AppKit                        	    0x7ff80481af09 -[NSPersistentUIRestorer finishedRestoringWindowsWithZOrder:completionHandler:] + 1514
13  AppKit                        	    0x7ff8051dd28f -[NSPersistentUIRestorer restoreStateFromRecords:usingDelegate:requireSecureCoding:completionHandler:] + 1910
14  AppKit                        	    0x7ff8046e0fd1 -[NSPersistentUIManager restoreAllPersistentStateWithCompletionHandler:] + 303
15  AppKit                        	    0x7ff8046e03e5 -[NSApplication _reopenWindowsAsNecessaryIncludingRestorableState:completionHandler:] + 358
16  AppKit                        	    0x7ff8046e016f -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 528
17  AppKit                        	    0x7ff8046dfdd0 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 665
18  Foundation                    	    0x7ff802ad26d4 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 308
19  Foundation                    	    0x7ff802ad2546 _NSAppleEventManagerGenericHandler + 80
20  AE                            	    0x7ff808359480 0x7ff80834e000 + 46208
21  AE                            	    0x7ff808358cea 0x7ff80834e000 + 44266
22  AE                            	    0x7ff80835232f aeProcessAppleEvent + 419
23  HIToolbox                     	    0x7ff80a95fce2 AEProcessAppleEvent + 54
24  AppKit                        	    0x7ff8046da402 _DPSNextEvent + 2036
25  AppKit                        	    0x7ff8046d866a -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1394
26  AppKit                        	    0x7ff8046cad19 -[NSApplication run] + 586
27  Chromium Embedded Framework   	       0x12c1493bc base::mac::CxxPersonalityRoutine(int, _Unwind_Action, unsigned long long, _Unwind_Exception*, _Unwind_Context*) + 4764
28  Chromium Embedded Framework   	       0x12c1481d3 base::mac::CxxPersonalityRoutine(int, _Unwind_Action, unsigned long long, _Unwind_Exception*, _Unwind_Context*) + 179
29  Chromium Embedded Framework   	       0x12c1073bd uhash_compareUnicodeString_69 + 754989
30  Chromium Embedded Framework   	       0x12c0d33fd uhash_compareUnicodeString_69 + 542061
31  Chromium Embedded Framework   	       0x12bdb7d3b __gxx_personality_v0 + 401403
32  Max                           	       0x1056b8282 MaxCefEventLoopHandler::runMessageLoop() + 18
33  Max                           	       0x105b31e10 juce::JUCEApplicationBase::main() + 144
34  Max                           	       0x105b31d63 juce::JUCEApplicationBase::main(int, char const**) + 83
35  dyld                          	       0x112c4752e start + 462

Hello !
I'm trying to debug a memory issue in an external. 

running-externals-with-asan-ubsan-on-macos

For anyone finding this post: the solution is to simply remove CEF from Max's embedded packages.

Running externals with asan / ubsan on macOS

ironside

Hi everyone. I’ve been posting on here for a while about ArtNet, and I’ve decided to bite the bullet.

I’m looking for a freelancer who would be able to code a native Max object which sends and receives artnet from Max. This object would then be open sourced so that there is a possibility of maintaining it long term.

I‘d be keen to keep the scope of the object limited - for example not incorporating complex fixture assignment features etc. I have a lot of artnet equipment which can be used to develop on, although I’d also probably expect whoever might be interested in this to have a good amount of experience in the lighting world.

This is self funded as a project, but I do have a budget. Maybe this is a long shot but I was wondering if anyone might be interested?

Thanks!

looking-for-freelancer-to-create-artnet-external

Yes, I could put something into this too. Let me know when you have an idea of the cost. Maybe best to email me  - davidestevens at (the apple email address)
I'd need it to run on Silicon Macs.
David

Hi, is it possible to develop this without actually having artnet hardware. Is there free software etc. that could be used to varify sending/receiving of the external? 

nvm, I searched "artnet monitor" and found good results. 

I thought David Butler was close to release lxmax.

https://github.com/pixsper/lxmax/

Would be amazing if he does, but I‘ve been a discord member of LXMax group for several years and it seems totally stagnant etc - Butler is incredibly generous with his contributions, but he’s essentially working for free and I can imagine it’s hard to find the time. AFAIK (and I’m just guessing so could be totally wrong), it’s been near release for a couple of years now.

Still fairly amazed there’s no native Artnet in Max in 2023, but thats how the cookie crumbles.

I am not a lighting person, and I don't have artnet experience, but if you don't find the person you are looking for, I would potentially be interested in seeing if this can be done with my Scheme for Max external. I would think using s4m plus the udpobject could be an elegant and fast way to tackle this. It would also have the advantage of enabling users to edit their domain level code much more easily than is the case with a native C external.  (A hyrbid approach might also be interesting with a lightweight custom external talking to s4m - s4m itself is a C external). If you don't find someone to do the full-native approach and want to talk to me about it, you can reach me through the s4m github page. https://github.com/iainctduncan/scheme-for-max

Any news on this? I would be down to pay into this as well.

Hire a Software Developer

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Looking for freelancer to create artnet external

Shakeeb Alireza

py2max is a pure python3 library without dependencies intended to facilitate the offline generation of Max patcher files (`.maxpat`, `.maxhelp`, `.rnbopat`)

Scripted offline generation of Max patcher files using Python objects corresponding, on a one-to-one basis, with Max/MSP objects stored in the `.maxpat` JSON-based file format.

Round-trip conversion between (JSON) `.maxpat` files with arbitrary levels of nesting and corresponding `Patcher`, `Box`, and `Patchline` Python objects.

Can handle potentially any Max object or maxclass.

Lots of unit tests and examples, >90% coverage.

Allows precise layout and configuration of Max objects and also experimentation with auto-layout algorithms.

Patcher objects have generic methods such as `add_textbox` and can also have specialized methods such as `add_coll`. For example, the `add_coll` method has a `dictionary` argument to make it easy to prepopulate the `coll` object using a python dictionary.

Batch modification of existing .maxpat files.

Create parametrizable objects with configuration from offline sources. For example, one-of-a-kind wavetable oscillators configured from random wavetable files.

Generation of test cases and .maxhelp files during external development

Takes the pain out of creating objects with lots of parameters

Prepopulate containers objects such as `coll`, `dict` and `table` objects with data

Save time creating many objects with slightly different arguments

Use graph drawing / layout algorithms on generated patches


Project URL
https://github.com/shakfu/py2max

Example
p = Patcher('my-patch.maxpat')
osc1 = p.add_textbox('cycle~ 440')
gain = p.add_textbox('gain~')
dac = p.add_textbox('ezdac~')
p.add_line(osc1, gain)
p.add_line(gain, dac)
p.add_line(gain, dac, inlet=1)
p.save()

If you end up using this library please provide feedback, scripts, techniques or otherwise via the GitHub project (PRs or Issues), as it would be nice to build up a standard library of useful code for re-use.

py2max is a pure python3 library without dependencies intended to facilitate the offline generation of Max patcher files (`.maxpat`, ... 

py2max-a-python-library-to-facilitate-offline-generation-of-max-patcher-maxpat-files

Very cool, thanks for sharing! I look forward to finding some time to check this out.

The best way to get a sense of library is to run `pytest` in the root of the project and then check out what is generated from the tests in the 'outputs' folder.

Thanks, excellent addition. I got a basic example working pretty easily. The usage examples are clear. 

Also post about this in the C74 User Projects section: https://cycling74.com/projects. It may get more attention there over time. 

For users who may be less experienced in python, add a brief section in the README to cover setup and basic usage - Install repo via git, create python files, import, etc.

py2max: a python library for offline generation of Max patcher (.maxpat) files

Iain Duncan

Hi Max hackers, I'm trying to add a UI object to Scheme for Max. It's dependent on s4m, and shares a global (or module level) hashtable declared and created in s4m. I'm stuck figuring out how to share code between two different object classes that I'm providing. I've tried putting it all in one file, with the ext_main setting up two separate classes. This seems to compile fine, but when I run it, the second class is not detected - if I try to make an s4mgrid object, I get the "no such object" error message. 

I would prefer to add this object from the s4m external code base as it makes no sense for it to be installed without s4m there, but I haven't found any good examples on how to do this. If anyone has done something similar and can help, or tell me a better way to go about it, that would be most appreciated!

Hi Max hackers, I'm trying to add a UI object to Scheme for Max. It's dependent on s4m, and shares a global (or module level) hashtable decl

c-sdk-how-to-provide-multiple-objects-from-one-external-code-base

Hi, did you find a solution? Facing the same problem while trying to create an object that contains multiple UI objects. It has to be possible as for example all live.UI objects are combined in live.guilib.mxe.

		//######### 1st obj
	
	t_class* c;
	c = class_new("obj1", (method)obj1_new, (method)obj1_free, sizeof(t_obj1), 0L, A_GIMME, 0);
	c->c_flags |= CLASS_FLAG_NEWDICTIONARY;
	jbox_initclass(c, 0); //JBOX_FIXWIDTH | JBOX_COLOR
	
	//add obj1 methods ...
 
	CLASS_ATTR_DEFAULT(c, "patching_rect", 0, "0. 0. 20. 20.");
	class_register(CLASS_BOX, c);
	s_obj1_class = c;
	
	//######### 2nd obj
	
	t_class *d;
	d = class_new("obj2", (method)obj2_new, (method)obj2_free, sizeof(t_obj1), 0L, A_GIMME, 0);
	
	d->c_flags |= CLASS_FLAG_NEWDICTIONARY;
	jbox_initclass(d, 0); //JBOX_FIXWIDTH | JBOX_COLOR
	
	//obj2 methods ...
	
	CLASS_ATTR_DEFAULT(d, "patching_rect", 0, "0. 0. 20. 20.");
	class_register(CLASS_BOX, d);
	s_obj2_class = d;
	

I have done it before and don't see the difference except that these are both UI boxes.? 

Ok, it seems that if one class name of the created objects matches the source file name it works for now, but I would still like to know how to do it independently.

Edit: No, still only one name works to call this main, only after that I can create instances of the other obj. So how do we register multiple names for an object before the main() has even been called by Max.?  

Hi I did get it to work by making a Max extension. I can't recall the details as it was a year ago, but you are welcome to look at my source! https://github.com/iainctduncan/scheme-for-max

C SDK: how to provide multiple objects from one external code base?

Esteban Gutierrez

Hi everyone! I'm Esteban and I've been using the min devkit for a little while now, getting nice results building externals using the Eigen library, however, I've never had the need to load a big chunk of data at runtime. 

To be precisse, what I'd like to do is bassically to fix some data at runtime that is stored inside a (Eigen) matrix. Since, attributes can be used with this purpose when the data is a number or a string, I thought I was going to be able to put the database inside one of those, for example doing something like this:

attribute<MatrixXf> database{ this, "data base", database_maker()};

where MatrixXf is the database class and database_maker() is a function that returns a build of the database, nonetheless this does not work.

Hi everyone! I'm Esteban and I've been using the min devkit for a little while now, getting nice results building externals using the Eigen ... 

how-to-propperly-load-a-database-using-the-min-devkit

How to propperly load a database using the min devkit

Magnus Berendes

I'm currently experimenting with some things and noticed that I cannot get a bitexact copy of my input pcm samples.

When I'm reading in a 24 bit wavfile using sfplay~ and immediately write it back onto the disk using sfrecord~ (with @bitdepth 24 @dither 0 @quantization 0) I get off-by-ones at roughly 50% of the samples (+1 sample delay, which is not the problem).
As far as my understanding goes Max uses 64bit floats to represent audio internally which shouldn't have any problem representing a 24 bit int exactly, should it?

Obviously, this isn't an audible problem but for my application bitexact transport would be necessary.

Any ideas where I lose my precision and any idea how I could get it back?

Thanks!


Hi there,
I'm currently experimenting with some things and noticed that I cannot get a bitexact copy of my input pcm samples.
When I'm ... 

bit-depth-of-individual-modules

>> "uses 64bit floats to represent audio internally which  shouldn't have any problem representing a 24 bit int exactly, should it?"

or unless one of the objects in question still has that bug where the top half of the values are offset by 1.

(insiders know where we once had that bug... even matlab had that same bug for years)

i suspect that sfplay/sfrecord is the cause, you can try if the same happens with buffer releated objects then you´ll see.

My first experiment was literally sfplay into sfrecord, no gain involved anywhere.

Now I used a buffer~ object (buffer~ inbuf <filename> 1000 6 @dither 0 @filetype wave @format int24 @quantization 0 @samps 48000) and used importreplace to import a file, then using writewave I wrote the buffer to the disk and compared it with my input file - no bueno, same picture. Off by ones all over the place. 

To me it seems it is just happening with high amplitude samples, maybe see if I can find a threshold...

if it is what i mentioned above it, should be only the positive values.

Yes, it is exactly what you mentioned: all values in [0.5*MAX, MAX] (for 24bit int) are off by one. Okay, so it is this bug and apparently sfrecord~/sfplay~ AND buffer~ are affected. Do you know if this bug is also "in" the patch cords? I.e. if I implement file reading and writing myself, will I be fine?

Or any way to get bugfree buffer~/sfplay~ implementations?

(Version of Max is 8.5.3, currently updating to 8.5.5)

that is a good question if it is runtime wide, and i would have to speculate, and to be honest i assumed that was long fixed.

for music and for listening to the result it does not matter much, for other applications it can. and if you import and export 100 times, the offset will be 100 values.

how to fix that? no idea. personally i would use file/fileout in max 4.x as a post process to other things. :)

for the read/write scenario adding one bit will fix it. but as soon as you perform some algo in 64 bit before, you could still get some wrong values.

are you abusing signals for something? alternatively you can abuse jitter matrixes for data collections, too.

proposed testing scenario:

create an "original audio file" in text format containing only (signed) min, max, max-1, and 0.

open the text  with max, write it into buffer~

play it from the buffer~ using play~ and record with record~ into another buffer

check  the values in the buffer (as far as it is possible to get the full 64 value for max-1/24bit?)

save audio file from buffer and see what is in it.


Bit-exact representation of 24bit int

11OLSEN

I just wrote an external using libav that requires the shared ffmpeg dll's. I noticed it keeps working even after removing the additional libs from the search path. So i did a search and it turned out the viddll package comes with this files. 
Does that mean we can write cool ffmpeg externals without having to provide the shared libraries.
Is it the same on the Mac? 

EDIT: Click here to download latest version.


I just wrote an external using libav that requires the shared ffmpeg dll's. I noticed it keeps working even after removing the additional li

ffmpeg-now-part-of-max

possibly on windows, but the Mac libraries have to be loaded from the viddll.engine library so I don't think that will work.

I'm seeing dylib files with the same names. isn't it the same prinziple on Mac (xcode), linking the project with dynam. libraries and that's it? I did compile externals for Mac but I think I never had to deal with dylib files. I'm going to find that out

well, def let us know. maybe it works fine!

Some progress here:
On Windows it works fine. It's all good  if  the ffmpeg dlls are somewhere in the search path, which is granted if the VIDDLL 1.1 Package is present.

On MacOs, after I  successfully installed ffmpeg-devel package with MacPorts to get the header files, i'm adding the dylib files to the xcode project and the build succeeds.
But when external gets loaded the dylibs can't be found :
(for some reason it only reports the error for libavformat. I'm also using libavcodec and libavutil.
I don't know if that means the other 2 dylibs have been opened successfully, I assume not)

11ffload~: unable to load object bundle executable
 2017-09-20 15:59:52.917 Max[727:707] Error loading /Users/admin/Desktop/max-sdk-7.1.0/externals/11ffload~.mxo/Contents/MacOS/11ffload~:  dlopen(/Users/admin/Desktop/max-sdk-7.1.0/externals/11ffload~.mxo/Contents/MacOS/11ffload~, 262): Library not loaded: 
 @loader_path/libavformat.57.dylib
   Referenced from: /Users/admin/Desktop/max-sdk-7.1.0/externals/11ffload~.mxo/Contents/MacOS/11ffload~
   Reason: image not found

Do you know where variable @loader_path is looked up or can be set to be the viddll support folder. It seems to look inside the mxo bundle for the dylibs. Do I maybe have to use dlopen() manually in the external? Would I even find the dylibs without hardcoded path? It seems the max.app folder is not in the search path opposed to Max 7 folder on Windows. 

I really prefer a solution that refers to VIDDLLs dylibs. Don't want to bundle 30mb with an extenal, 30mb that are already present in every users Packages folder.    

I edited the binary in the mxo bundle with install_name_tool. I replace the "@loader_path" parts with absolute paths to "/Applications/Max.app/Contents/Resources/C74/packages/VIDDLL/support/libname.dylib" and IT WORKS. really, could it be so simple? (after reading endless posts, saying you can't link to a dylib outside the app bundle i'm confused)

Is it correct that the Max app path is a fixed thing on Mac and I can rely on this hardcoded path working on every Mac + Max?  

Having all applications in the Application folder is something I never liked in OSX. So on my Macs, Max is not in the Application folder, nor in ~/Applications.
And if you create standalones with you external, I guess it won't find the library.

Hmm ok thanks for the info. So the path is not reliable. 
You are right, creating a standalone is another problem where it makes no sense to link to Max app.
For now I was hoping I can make it work crossplatform in Max4Live. At least I can be sure the Max app is somewhere on disk in this environment. But i'm kinda loosing hope it will work on Mac.
If I pack the libs with mxo bundle i got a 33mb external. Is that a problem at all? 
O.  

Omg, turns out every mxo knows the location of the Max binary at runtime and can navigate relative to this location. i'm setting the pathes like this:
"@executable_path/../Resources/C74/packages/VIDDLL/support/libavcodec.dylib"
  
i didn't noticed first but that's how they find the jitter and audio framework:
@executable_path/../Frameworks/MaxAudioAPI.framework/Versions/A/MaxAudioAPI
@executable_path/../Frameworks/JitterAPI.framework/Versions/A/JitterAPI


Any news on your experiments? 
I'm using ffmpeg via shell right now, looking for a more convenient way to reas and re-encode a stream directly in max. Since I'm here, another question, is there a way in max/jitter to play an open video file?(I mean a videofile that is still been encoded). I can open a ts file with jit movie it just lets me watch what has been recorded at the time i ve opened the file. I need to reopen the file everytime I want to so see a new part of the stream.
cheers

I have a working prototype that decodes any file into a buffer~ like the "replace" message of buffer. I have not investigated into the video part of ffmpeg but that is probably what viddll and related jit externals do. 
I got a little bit lost and frustrated trying to implement a clever solution for handling big files, i mean files that exceeds buffers maximum size. 
Once i can finalize the last 5% of the external i'm happy to share it + source code. But, like i wrote above, it uses a thread to decode an audio stream to buffer~, no video involved.

Basically I think you can put any ffmpeg feature into in external. What helped a lot was to code the function in an  executeable to debug and create a working example before  moving it to an external.
Even this first step was a lot of struggle as most examples on the web are outdated if you use latest libs. 


seems really interesting. I'm looking forward to it, have fun and a nice week ;)

[beta download removed]

scr included. If this works for everybody I'll put this to my site as a download.
And HappyHalloween for all you guys ;)


very cool 11OLSEN, thanks much for sharing and congratulations on getting those libraries working for you!

Hi, 11Olsen. Great external. It's particularly useful when simultaneously dealing with audio and video/3D animation. I've done it in the past and there's some pauses in Jitter while audio is being read from disk. It really should be the standard behaviour of the loading process of buffer~ and other similar objects. 

Yes, I want to do an audiofile-browser-like thing. And a seemless prelistening function of files is not possible with the blocking behaviour of the default objects.    

I removed the beta version download. I fixed many bugs since then, some of them are critical.

Second, i noticed that when the osx external is frozen into a m4l device the "unable to load object bundle executable" - error is back. The frozen device state seems to isolate the externals from the max app ? Seems this is not finished yet. I have to dive into it again.  

As long as the m4l-Editor is not opened, the @executable_path for externals links to the Live app.
Where it finds the Max frameworks but of course not the viddll package. Ok didn't know that. 

Maybe that changes with Live 10. For now I see no other way than using @loader_path and including the dylibs in the mxo bundle. sad


Here's version 1.0: http://www.11olsen.de/code/max-objects/11ffload 

All ffmpeg dependencies are included for now. 


what happened to this external?
can i test it ? ;)


Hi Klaus,
my plan was to put it back online when i managed to recompile for Apple Silicon.


I think that external is really useful especially because it supports many codecs. I keep seeing posts from people who would like to load audio tracks from movie files. It can do that with no problem.
But I'm struggling to create a Mac version which supports intel and arm64. I'm on intel Catalina and after installing ffmpeg with homebrew, I find the files that I need:
libavcodec.dylib
libavformat.dylib
libavutil.dylib
libswresample.dylib
I can use install_name_tool to put these into the external after compiling. Now my idea is to get the arm64 versions of these files and maybe use lipo tool to join them together. But i can not even try without having access to these versions and homebrew doesn't let me install a package of another arch. 

Maybe someone using an apple silicon maschine can install ffmpeg and send files to me. Or someone has another idea. I'm trying to avoid having to universally compile ffmpeg myself it seems hard to find the files for arm64 online. 


Max ships with "Fat" versions of these libs, maybe you can make use of those?

Nice idea! I'm gonna try it. Also I found something on stackoverflow how to install a second arm-homebrew and make it install arm bottles. I'll report back.

Thanks again @Rob. Only thing i had to do was to install homebrew ffmpeg4 instead of 5 to have the correct header files. 
Would someone with an Apple Silicon machine be so kind as to confirm that it works before I make it an official download again?


i get:
11ffload~: cannot be loaded due to system security policy
i am not sure how to get around this. whith my externals i at least get a dialog about it.


Hi Klaus, thanks for testing. Here is a second take on it. This time I had Xcode automatically copy the dylibs to the bundle. If this also doesn't work it's probably a signing problem. Can you try again, please?

sorry, no good news.
i still get this same error.
even when running xattr -d com.apple.quarantine 11ffload~.mxo
the error remains.


with 11strokes eg. i get this dialog, which then solves the issue:

yes working now !!
including the dialog from above.


The buffer~ size limit seems to be obsolete. I can load complete movie 5.1 audio stream into a buffer.

I fixed another bug with some avi formats and have revived the download.

I've invested a lot of time for another update. I hope it was worth it. 

added importreplace, import and info messages

added resample, metadatadict and import-related attributes

added "channel route" argument for all messages

added ability to import from another buffer~

Since it has become quite complex now, I may have overlooked one or the other bug. Don't hesitate to contact me. DOWNLOAD HERE 

very nice!! been trying to make this work with Native Instruments Stems format which is an .mp4 container of 5 stereo tracks, but it only seems  to recognize as 2 channels.. curious if anyone has been able to  unpack the stems in Max?

OK, I see the problem. I need to put in a way to set the number of stream to use from the file instead of autoselecting it.

I updated the external, redownload and overwrite. In the new help file check out the "streams" tab. At least all stem files I have here for testing are separated correctly to 5 stereo buffers~ now.
 

yes!!! you just breathed a whole new life in the Stems format!! thank you!

I noticed for some mp3 files loaded with the external that some milliseconds are missing at the beginning.
All other ways to load the file (Max, Live, external editor) had this additional milliseconds so I knew my decoder is doing something wrong.  

I couldn't find out what's wrong by scanning my code. But when I try the ffmpeg cli, I noticed there is something like a start offset detected.  

So I'm currently trying to find out how they are getting this value in the ffmpeg executables. Because in my code all timestamps report 0. for the first packet or audio stream start point of the same file.  

I don't know how you interact with ffmpeg in your code,
start offsets can be controlled in ffmpeg using -copyts  and -start_at_zero

that offset 0.025056 sec is probably to align audio and video stream.


I interact with it in C with the ffmpeg libs, so on a relatively deep level, not by remotely starting ffmpeg executables with command line parameters. I found a lot of files that come with the start offset, so I can't just blame it on the fact that it's a very rare file format and live with it.

I now successfully detect the offset if it is present in the external.


BUT it's not clear how to deal with it as Max and Live for example use different methods.

The external is not involved in this comparison. The file loaded with a replace message to buffer~. Zoomed in to the beginning of the file using a waveform peak as a marker at 454 ms

Loaded into a Simpler or to an audio clip in Live, the action starts about 26 ms later 


same in an external editor, which uses lame as encoder


When I look at the reported length for the file, there are more differences.
Max buffer~ and the external editor report 3:15:500. Loaded in Live it says 3:15:578. Only Live devs may know where the extra ms are coming from but a correct start point is more important to have compatible onset times for example. 

It kind of forces me to implement a switch or make a decission for compatibillity with either Max or Live.   

My observation is that in this kind of mp3 files with offset, only the first packet which has a timestamp of 0.0 is incorrect. All following packets seem to have a time stamp that is already compensated with the start offset.
So normally a rule like "if packetTime == 0. and startOffset != 0. then (packetTime = startOffset)"
would be enough. And Max buffer~ seems to encode it like this. Another way is to simply add the startOffset to every packet timestamp which would produce the same result as Live loading the file.   


from https://lame.sourceforge.io/tech-FAQ.txt

===============================================
1.   Why is a decoded MP3 longer than the original .wav file?

Because LAME (and all other MDCT based encoders) add padding to the
beginning and end of each song.  For an explination of why,
see the questions below.

LAME embeds the amount of padding in the ancillary data of the
first frame of the MP3 file. (LAME INFO tag). The LAME decoder 
will use this information to remove the leading padding of an MP3 file.  

Modifications to the decoder so that it will also remove the
trailing padding have not yet been made.  
===============================================

depending on converter used output could be different.

Lame vs FFMPEG libs, which max uses when importing mp3 into buffer



I went with Live compatibillity after I noticed that Live loads the mp3 with the same offset on Win and Mac. Max on the other hand is not even using the same method on both platforms.


On Mac, the first onset is at 430ms, on Win it's at 454ms, in Live it's at 480ms on both platforms.
You see the distance between the values is about 25ms. All 3 case use a different approach to handle the offset when decoding.

Anyways, regarding the external I have my solution for now and will upload an updated version after more testing. 
Maybe I write to Support and let them know about this. I know that MP3 doesn't have much value in audio production, but as long as we offer loading of this format, the results must have consistent timing.

11ffload~ external

charly

is their any message that is sent from max to the externals when the dsp is turned off? In other words I am looking for the equivalent of addmess(myexternal_dsp,"dsp", A_CANT, 0); to call a function when the user turn the dsp off.
Does it exist?

function-called-when-dsp-is-turned-off

I have the same question for Max 8. Is there a method that get's called when DSP is off so that I can hook some cleanup functions to it?

I know there's the dsp_state~ object, but is there anything at the Max c-api level that does the same?


In your main function add a 'dspstate' method, then add a function that handles the call and does whatever you want to happen.
hth


class_addmethod(c, (method)myObj_dspstate, "dspstate", A_CANT, 0);
...

void myObj_dspstate(t_myObj *x, long n) 
{
    if(n) ...
    else ...
}


function called when dsp is turned off

Darling Lee

Thank you every one! I made it.please delete this topic.


could-you-please-help-me-with-an-external-object-compilation-issue

Could you please help me with an external object compilation issue?(Closed)

skrasms

I wanted to update some old externals that I wrote, but the process has changed. The 7.3.3 SDK included VS projects, and they had build configurations for x86 and x64 platforms. It was straightforward. I'm finding 8.2 is more involved, and I am not sure how to get a successful build from the examples.

I downloaded the 8.2 SDK and went through the cmake step to generate VS projects for my version of VS (Visual Studio 14 2015). The projects generated successfully. However, the resulting projects aren't configured to build correctly in VS. The build options that appear in VS are all Win32, and the builds fail. I imagine that is related to the mismatch between 32 and 64-bit. There are a lot of warnings like:
warning LNK4272: library machine type 'x64' conflicts with target machine type 'X86'

Are there steps that I'm missing? Do I need a specific version of Visual Studio for this to work?

I wanted to update some old externals that I wrote, but the process has changed. The 7.3.3 SDK included VS projects, and they had build conf

how-to-use-sdk-8-2-with-visual-studio-on-windows

I went through the same process. You should install a more up to date version like VS 2019. It's free except they force you to sign up for a MS account. 

Thank you for the suggestion. I just downloaded VS 2022, and that's working.

Could you provide images about  settings in VS2022 ?  I had tried for a long time for building an external and did not success yet...

Cycling '74 Forums

For anyone finding this post: the solution is to simply remove CEF from Max's embedded packages.

Any news on this? I would be down to pay into this as well.

Thanks HighHarmonics Glad to hear it worked for you. Appreciate the good suggestions too!

Hi I did get it to work by making a Max extension.

Hi everyone! I'm Esteban and I've been using the min devkit for a little while now, getting nice results building externals using the Eigen ...

that is a good question if it is runtime wide, and i would have to speculate, and to be honest i assumed that was long fixed. for music and ...

I went with Live compatibillity after I noticed that Live loads the mp3 with the same offset on Win and Mac.

In your main function add a 'dspstate' method, then add a function that handles the call and does whatever you want to ...

Thank you every one! I made it.please delete this topic.

Could you provide images about settings in VS2022 ? I had tried for a long time for building an external and did not success yet...