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59 lines
2.4 KiB
Plaintext
59 lines
2.4 KiB
Plaintext
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sms_ntsc 0.2.3: Sega Master System NTSC Video Filter
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----------------------------------------------------
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This library filters a Sega Master System image to match what a TV would
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show, allowing an authentic image in an emulator. It uses a highly
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optimized algorithm to perform the same signal processing as an NTSC
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decoder in a TV, giving very similar pixel artifacts and color bleeding.
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The usual picture controls can be adjusted: hue, saturation, contrast,
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brightness, and sharpness. Additionally, the amount of NTSC chroma and
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luma artifacts can be reduced, allowing an image that corresponds to
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composite video (artifacts), S-video (color bleeding only), RGB (clean
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pixels), or anywhere inbetween.
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The output is scaled to the proper horizontal width, leaving it up the
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emulator to simply double the height. Specialized blitters can be easily
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written using a special interface, allowing customization of input and
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output pixel formats, optimization for the host platform, and efficient
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scanline doubling.
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Blitting a 248x192 source image to a 581x384 pixel 16-bit RGB memory
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buffer at 60 frames per second uses 7% CPU on a 2.0 GHz Athlon 3500+ and
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33% CPU on a 10-year-old 400 MHz G3 PowerMac.
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Author : Shay Green <gblargg@gmail.com>
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Website : http://www.slack.net/~ant/
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Forum : http://groups.google.com/group/blargg-sound-libs
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License : GNU Lesser General Public License (LGPL)
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Language: C or C++
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Getting Started
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---------------
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Build a program from demo.c, sms_ntsc.c, and the SDL multimedia library
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(see http://libsdl.org/). Run it with "test.bmp" in the same directory
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and it should show the filtered image. See demo.c for more.
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See sms_ntsc.txt for documentation and sms_ntsc.h for reference. Post to
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the discussion forum for assistance.
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Files
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-----
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readme.txt Essential information
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sms_ntsc.txt Library documentation
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changes.txt Changes made since previous releases
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license.txt GNU Lesser General Public License
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benchmark.c Measures frame rate and processor usage of library
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demo.c Displays and saves NTSC filtered image
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demo_impl.h Internal routines used by demo
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test.bmp Test image for demo
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sms_ntsc_config.h Library configuration (modify as needed)
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sms_ntsc.h Library header and source
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sms_ntsc.c
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sms_ntsc_impl.h
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--
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Shay Green <gblargg@gmail.com>
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