Google brotli for ESP-IDF.
Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression.
Homepage is here.
I ported this for ESP-IDF.
- In the components directory, clone Brotli version 1.1:
git clone https://github.com/google/brotli components/brotli
- In the new Brotli directory, create a CMakeLists.txt file.
cp esp32/CMakeLists.txt components/brotli/
- Compile this project.
-
brotli version 1.1.
The version of brotli is written here. -
ESP-IDF V4.4/V5.x.
ESP-IDF V5.0 is required when using ESP32-C2.
ESP-IDF V5.1 is required when using ESP32-C6.
git clone https://github.com/nopnop2002/esp-idf-brotli
cd esp-idf-brotli
git clone https://github.com/google/brotli components/brotli
cp esp32/CMakeLists.txt components/brotli/
cd spiffs
idf.py build
sudo apt-get install brotli
brotli path_to_input -o path_to_output
brotli -d path_to_input -o path_to_output
brotli README.md -o README.md.br
brotli -d README.md.br -o README.md.md
diff README.md README.md.md
python3 -m pip install Brotli
cd esp-idf-brotli/python
# Compress file
python3 compress.py path_to_compress path_to_output
# Decompress file
python3 decompress.py path_to_decompress path_to_output
python3 compress.py test.txt test.txt.br
python3 decompress.py test.txt.br test.txt.txt
diff test.txt test.txt.txt
| source file | source size(byte) | brotli comress(byte) | zlib compress(byte) |
|---|---|---|---|
| test.txt | 20479 | 9470 | 4571 |
| esp32.jpeg | 18753 | 18613 | 18218 |
| esp32.png | 43540 | 43640 | 43264 |