Add Support for Combined SYNC (CSYNC) #53
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Seperate Sync |
GavinAndrews
changed the title
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How get I encourage this to get reviewed and merged? |
A scanvideo with CSYNC would be nice. |
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Many older arcade CRT monitors take CSYNC (combined VSYNC and HSYNC) rather than the HSYNC and VSYNC currently generated by the scanvideo library. This enhancement allows a user to add a flag CSYNC_EXTEND or CSYNC_SUPPRESS to the h_sync_polarity to change this into a combined CSYNC.
CSYNC_SUPPRESS (compatible with old arcade games e.g. Galaxian) causes HSYNC to be suppressed during VSYNC, CSYNC_EXTEND effectively reverses the polarity and timing of HSYNC during VSYNC allowing monitors to detect VSYNC but not lose timing.