CMath and memory management error when modifying audio recorder example

[Larry]

Hi everyone, I hope to add the SNR calculation based on the audio_recorder example. I meet the following two problems right now.

1. In order to complete this, I have to use the log10 function defined in <math.h>. In order to call it, right now I just add the inclusion at the top of audio_recorder_main.cxx

#include <math.h>

This is the only change I made to use the log10 function. While when 'make', the following errors occur:

I have no idea why it has such errors.

2. In order to save 250ms data for updating, right now, I defined 3 large arrays
   int16_t leftBufferAll[20250];
   int16_t rightBufferAll[20250];
   int16_t throatBufferAll[202*50];

When running, the following error occurs.

I think this error is related to the large array defined above. Is it possible to change the system memory management part to make it works?

Thank you in advance for any help.

Best,

Larry

[Larry]

Would someone kindly tell me what's the cause of this issue when running? Is it a run-time issue?

[CamilaSouza]

Hi, @Larry
Regarding your first question
please include math.h as follows:

#include <nuttx/lib/math.h>

Please share the code your trying to run so I can investigate the other issues.

[Larry]

@CamilaSouza Hi Camila, Thank you for your kind reply. However, this still not working as it shows log10 is not declared in the scope.

For the code to check other issues, please check the following link:
https://drive.google.com/drive/folders/15myQ_mmQgtlaDka_SNIIRxinf3cz5s-P?usp=sharing
I wrote a detailed debug report for the design goal and issues I have. Please kindly read the word document before looking into the code. I got stuck by those issues for two months and I sincerely hope to get your help in solving these issues. Thank you so much in advance for any help.

Best,

Larry

[CamilaSouza]

@Larry
Thanks for sharing detailed information.
I will take a look at your documents.

[CamilaSouza]

Hey, @Larry

So here is a fix to be able to import the math.h library in the audio recorder example:

Please edit the Makefile inside the audio_recorder example folder and add the following line to the "# Audio Example flags" section:
CXXFLAGS += -D_GLIBCXX_INCLUDE_NEXT_C_HEADERS

This is what that section will look like after this modification:

# Audio Example flags

CXXFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" "$(AUDIODIR)"}
ifeq ($(CONFIG_EXAMPLES_AUDIO_RECORDER_USEPREPROC),y)
CXXFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" "worker$(DELIM)userproc$(DELIM)include"}
endif

CXXFLAGS += -D_POSIX
CXXFLAGS += -DUSE_MEMMGR_FENCE
CXXFLAGS += -DATTENTION_USE_FILENAME_LINE
CXXFLAGS += -D_GLIBCXX_INCLUDE_NEXT_C_HEADERS

After that, in the terminal, do
$ make distclean
$ tools/config.py examples/audio_recorder
$ make -j

You should be able to use math.h normally after that.
Please let me know if it worked for you too.