example-1 not working in ESP32 - compression failed

[Noushadalik]

Hi,
I'm trying to run example1 with miniz version 2.0.2 for matching my esp idf component miniz version (9.1.15) but I got compression failed how to fix it?
esp idf log :
miniz.c version: 9.1.15
compress() failed!
Does anyone have any idea about the proper integration of miniz to esp32? (esp idf version 4.4.1)

[msdarici]

Could u solved? I'm encountering same problem.

[uroni]

I think you have to use an old version from code.google.com/p/miniz to match the signature of the functions included in the ROM.

[italocjs]

Hi, did you ever find a solution?

[parraghb]

Hello all, I would also need the solution.

[italocjs]

Hello all, I would also need the solution.

i found this, will test very soon, https://github.com/nopnop2002/esp-idf-zlib.git

[italocjs]

Hello all, I would also need the solution.

i found this, will test very soon, https://github.com/nopnop2002/esp-idf-zlib.git

Just gave up, been trying for days now. absolutely NOTHING i tried has been able to compress a 32kb file. even using the exact same examples. If you ever find a solution i'd love to hear.

[parraghb]

Hello my friend,

After 2 full days of struggle I found the solution to compress files in case of ESP. I spent most of my time installing and configuring the library, but it works now. First of all, forget the miniz library and use zlib.

Try it step by step:

• run in terminal: idf.py add-dependency zlib
• run: idf.py build
• check yaml file: dependencies: espressif/zlib: "*"
• include to filesys: #include <zlib.h>
• NEVER use this: compress(compressed_data, &compressed_size, (const Bytef *)input, input_size) != Z_OK)
• USE this: ret = deflate(&strm, flush);
• MANDATORY: int ret = deflateInit2(&strm, Z_BEST_COMPRESSION, Z_DEFLATED, 9, 2, Z_DEFAULT_STRATEGY);
• NEVER use RAM!!
• USE chunk_size.
• USE inflate instead of decompress

If you have any questions feel free to write!
BR, Beni

[italocjs]

Hello my friend,

After 2 full days of struggle I found the solution to compress files in case of ESP. I spent most of my time installing and configuring the library, but it works now. First of all, forget the miniz library and use zlib.

Try it step by step:

• run in terminal: idf.py add-dependency zlib
• run: idf.py build
• check yaml file: dependencies: espressif/zlib: "*"
• include to filesys: #include <zlib.h>
• NEVER use this: compress(compressed_data, &compressed_size, (const Bytef *)input, input_size) != Z_OK)
• USE this: ret = deflate(&strm, flush);
• MANDATORY: int ret = deflateInit2(&strm, Z_BEST_COMPRESSION, Z_DEFLATED, 9, 2, Z_DEFAULT_STRATEGY);
• NEVER use RAM!!
• USE chunk_size.
• USE inflate instead of decompress

If you have any questions feel free to write! BR, Beni

Thanks very much for the response! i will try it! :)