Use MP3EndoderLAME and MP3DecoderHelix in the same project?

[rasmushauschild]

Hi!
I'm experimenting with the different MP3 encoders and decoders, but I'm hitting a roadblock:
If I install arduino-libhelix-main and arduino-liblame-main in my project and in AudioCodecs.h I define both USE_HELIX and USE_LAME, I run into a declaration conflict for all the LogLevelLame and LogLevelHelix enumerators:

In file included from lib/arduino-liblame-main/src/MP3EncoderLAME.h:3,
                 from lib/arduino-audio-tools-main/src/AudioCodecs/CodecMP3LAME.h:4,
                 from lib/arduino-audio-tools-main/src/AudioCodecs/AudioCodecs.h:22,
                 from lib/arduino-audio-tools-main/src/AudioTools.h:29,
                 from src/main.cpp:7:
lib/arduino-liblame-main/src/lame_log.h:26:20: error: 'Debug' conflicts with a previous declaration
 enum LogLevelLame {Debug, Info, Warning, Error};

Do I need to modify the enumerator names in one of the libraries, or am I missing something?

Thanks in advance!
Rasmus

[pschatzmann]

It might be that there are some confilcts - but in any case you will not be able to use more then one library at the same time because there is just not enough memory!
Do not use USE_HELIX or USE_LAME (it is legacy code which will be removed soon) but use the corresponding includes like shown in the examples...

Last, but not least, I just committed a correction to liblame which should resolve the conflict...

[rasmushauschild]

Thanks for clarifying!
As far as I can tell, Helix is only used for decoding MP3 and LAME is only used for encoding MP3 - so how would you create a program that can do both, without including both libraries?

I can't seem to find this functionality in the examples.

Thanks for the help!

[pschatzmann]

You might have overlooked that the problem has been resolved. Just update the library!
I will not be able to resolve the issues related to the limited memory though - so it will only work with PSRAM or if you run the sketch on the desktop....

I would recommend to use some leaner codecs instead of MP3...

[rasmushauschild]

Ah, I see! Thank you.
Ideally I would like to use a more storage-efficient format than WAV - it's for a voice recording sketch, so audio quality and file sizes are both important factors.
Do you have a recommendation as to which codec might be best suited for that kind of job?
Perhaps the fdk-aac encoder/decoder is more efficient than MP3 in terms of RAM usage?

Thanks!

[pschatzmann]

Since it is only voice, the field is pretty much open and you can look at all of the available options. I suggest to have a closer look at opus or at the low complexity codecs that are also used by Bluetooth (aptx, lc3)

[rasmushauschild]

Perfect! I will read up on those.

Thank you very much for your help!