snes_ntsc 0.2.2: SNES NTSC Video Filter --------------------------------------- This library filters a Super NES image to match what a TV would show, allowing an authentic image in an emulator. It uses a highly optimized algorithm to perform the same signal processing as an NTSC decoder in a TV, giving very similar pixel artifacts and color bleeding. The usual picture controls can be adjusted: hue, saturation, contrast, brightness, and sharpness. Additionally, the amount of NTSC chroma and luma artifacts can be reduced, allowing an image that corresponds to composite video (artifacts), S-video (color bleeding only), RGB (clean pixels), or anywhere inbetween. The output is scaled to the proper horizontal width, leaving it up the emulator to simply double the height. An optional even/odd field merging feature is provided to reduce flicker when the host display's refresh rate isn't 60 Hz. Specialized blitters can be easily written using a special interface, allowing customization of input and output pixel formats, optimization for the host platform, and efficient scanline doubling. Blitting a 256x240 source image to a 602x240 pixel 16-bit RGB memory buffer at 60 frames per second uses 8% CPU on a 2.0 GHz Athlon 3500+ and 40% CPU on a 10-year-old 400 MHz G3 PowerMac. The library requires 4MB of memory. Author : Shay Green <gblargg@gmail.com> Website : http://www.slack.net/~ant/ Forum : http://groups.google.com/group/blargg-sound-libs License : GNU Lesser General Public License (LGPL) Language: C or C++ Getting Started --------------- Build a program from demo.c, snes_ntsc.c, and the SDL multimedia library (see http://libsdl.org/). Run it with "test.bmp" in the same directory and it should show the filtered image. See demo.c for more. See snes_ntsc.txt for documentation and snes_ntsc.h for reference. Post to the discussion forum for assistance. Files ----- readme.txt Essential information snes_ntsc.txt Library documentation changes.txt Changes made since previous releases license.txt GNU Lesser General Public License benchmark.c Measures frame rate and processor usage of library demo.c Displays and saves NTSC filtered image demo_impl.h Internal routines used by demo test.bmp Test image for demo snes_ntsc_config.h Library configuration (modify as needed) snes_ntsc.h Library header and source snes_ntsc.c snes_ntsc_impl.h -- Shay Green <gblargg@gmail.com>