amDCT

amDCT() is an adaptive video filter providing deblocking, sharpening, local range expansion, smoothing, and bright noise removal in a single filter that can be used on video of any level of quality. These four operations work synergistically to drastically reduce block artifacts while maintaining detail and increasing local contrast.

Only 8 bit YUV(A) or greyscale formats are supported.

See documentation separately.

Build intructions: see below.

Changelog

(20241217) v1.4.2 (no release)
- Source: remove mmx, threading to c++17 to make it more gcc/minGW friendly
- gcc/minGW build possible
- C only (zero Intel Intrinsics dependency) is possible by not defining "INTEL_INTRINSICS"
- Add CMake build environment
(20241210) v1.4.2
- Rewrite all external assembly codes (fdct, idct, h263 and mpeg quant-dequants) to Intel intrinsics. It's now quicker - sometimes significantly - than the original.
- Source: changed Windows specific threading code into C 17 version.
- Source cleanup: removed lots of never used test codes from the source, rewrite some others. Move to cpp.
- Add ability to pass Avisynth+ frame properties
- Add support for any 8 bit planar YUV(A) or Y format (was: YV12 only)
- Copy A alpha plane as well, if exists. (The filter works only on luma channel, other planes are simply copied)
- Fix: add meaningful error message (Issue #2) for clips with non-mod8 width or height dimensions (was: out of memory)
- Add Clang-cl LLVM build option, make source Clang friendly
- Speedup examples:

| qtype | 32 bit clangcl | 32 bit msvc | 32 bit old 1.3 | 64 bit clangcl | |-------|----------------|-------------|----------------|----------------| | 1 | 6.12 fps | 5.49 fps | 5.40 fps | 6.56 fps | | 2 | 6.67 fps | 5.93 fps | 5.28 fps | 7.08 fps | | 3 | 4.09 fps | 3.61 fps | 3.22 fps | 4.29 fps | | 4 | 6.66 fps | 5.98 fps | 5.29 fps | 7.16 fps |

(20241128) (technical update)
- arrange source to GitHub
- fixed sharpTAmt typo in the wrapper avs script
- project is now public on GitHub
(20241127) v1.4.1, (Ferenc Pintér)
- project moved to github: https://github.com/pinterf/amDCT (private until cleaned up)
- Built using Visual Studio 2022
- Changed to AVS 2.6 plugin interface
- 64 bit build for Avisynth+
- Added version resource to DLL
- Drop all inline MMX assembly, convert them to SIMD intrinsics, sometimes based on C code, Since some rewritten parts require SSE4.1 this is the minimum processor requirement.
- external assembly (fdct, idct, h263 and mpeg quant-dequants) temporarily removed
- source changes: some efforts made for future C-only (non-Intel) and Windows independent build, cleanup, etc.
(20190705) v1.3_Testing (Jim Conklin) fixes freeing the same memory twice.
(20190611) v1.2_Testing (Jim Conklin) Fixed the "Horrible anomalies", artifacts disappear when removing 'brightStart=205'
(20190314) v1.1_Testing (Jim Conklin)
(20170318) v1.0 released (Jim Conklin)

Future todo:

Single DLL, optimizations for different CPU instruction sets are chosen automatically.
Further code cleanup, remove redundant parameter checks, organize program structure to multi Avisynth-Vaporsynth friendly
Reports MT Mode for Avisynth+: MT_NICE_FILTER or MT_???

Build instructions

VS2022:

preferably use the ready-made .sln solution file from Visual Studio IDE

or see below other command line possibilities

Note: for Windows builds, first make a build folder from project root in order to not overwrite my 'official' .sln and vcxproj files.

Windows GCC (mingw installed by msys2): from the 'build' folder under project root:

del .\CMakeCache.txt del ..\CMakeCache.txt cmake .. -G "MinGW Makefiles" -DENABLE_INTEL_SIMD:bool=on @rem test: cmake .. -G "MinGW Makefiles" -DENABLE_INTEL_SIMD:bool=off cmake --build . --config Release --clean-first

Windows Intel C++ Compiler 2025:

del ..\CMakeCache.txt del .\CMakeCache.txt C:\Program Files (x86)\Intel\oneAPI\setvars.bat cmake ../ -T "Intel C++ Compiler 2025" -DCMAKE_CXX_COMPILER="icx.exe" cmake --build . --config Release --clean-first

Windows MSVC v141_xp toolset:

del ..\CMakeCache.txt del .\CMakeCache.txt C:\Program Files (x86)\Intel\oneAPI\setvars.bat cmake .. -G "Visual Studio 17 2022" -A x64 -T "v141_xp" -DWINXP_SUPPORT:bool=on -DENABLE_INTEL_SIMD:bool=ON cmake --build . --config Release --clean-first

Windows MSVC (C only - no Intel SSE2 codes - test):

del ..\CMakeCache.txt del .\CMakeCache.txt C:\Program Files (x86)\Intel\oneAPI\setvars.bat cmake .. -G "Visual Studio 17 2022" -A x64 -DENABLE_INTEL_SIMD:bool=off cmake --build . --config Release --clean-first

Linux from the 'build' folder under project root: ENABLE_INTEL_SIMD is automatically off for non x86 arhitectures

Clone repo and build

  git clone https://github.com/pinterf/amDCT
  cd amDCT
  cmake -B build -S .
  cmake --build build

Useful hints:
build after clean:

  cmake --build build --clean-first

Force no asm support

  cmake -B build -S . -DENABLE_INTEL_SIMD:bool=off

delete cmake cache

  rm build/CMakeCache.txt

Find binaries at
```
  build/amDCT/amDCT.so
```
Install binaries
```
  cd build
  sudo make install
```

AmDCT

Install / Use

README

amDCT

Changelog

Build instructions

Build instructions

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