willmanyoung / opencl-jpeg

Implement of JPEG codec with OpenCL fork from IJG libjpeg

OpenCL-JPEG(Beta)

Intro

Implement of JPEG codec with OpenCL fork from IJG libjpeg (v8)

• Decode/Encode JPEG Image
• Resize JPEG Image
• Do not support libjpeg(v8) smart scale, because I do not understand the code :D
• Do not support other transform now, such as rotate, crop, etc :D

I recommend to use this lib with resize feature, because data transform between CPU and GPU is very expensive.

Install

• CPU Version

  ./configure && make && make install

then you can find cjpeg djpeg jpegtran rdjpgcom wrjpgcom in the source directory

• GPU Version

  • OSX

    ./configure --enable-opencl --enable-shared=no && make && make install

  then you can find jpegresize in the source directory. It will be some mistakes when compile shared library, so you need to disable shared library

  • Linux

    ./configure --enable-opencl --with-openclincludedir=xxx --with-opencllibdir=xxx

  because I do not have an Linux Computer supported OpenCL, so I do not test this branch, if you find any problem please let me know

Usage

./jpegresize -w 500 -h 300 -q 80 -outfile han.jpg testimg.jpg

The command will resize testimg.jpg to 500x300 image use your GPU device.

TODO

• Code & Performance
• Benchmark
• Http Server

LICENSE

MIT License