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a203ad1aab
* libdvbsub gives us alpha channel already, not transparency level, so don't do another "alpha = 255 - alpha", this is done by libdvbsub. * Fix alpha channel handling in interpolation - assrender had an additional 1bpp alpha bitmap as a possible mask, we don't. So don't use the palette index array as alpha values; bug from quick code porting long ago to changing pixel colors (assrender has a single pixel color for whole regions or something, unlike dvbsub, which has indexed colors). * Don't forget to reassign our YUV and other local pixel color variables after shifting to work on the bottom part of a 2x2 subsample block, or it's obviously very blocky. Remaining issues in blending: * Should probably be interpolating or doing something else useful with the resulting U and V channels, so that most of the source pixel UV values would actually be actually cared about, except for just one out of possibly four. * Don't convert AYUV to ARGB in libdvbsub, and then back from ARGB to AYUV in dvbsuboverlay for no reason * Re-factor the whole thing to something more like textoverlay blending * Related to that, perhaps cache the current spu in a good format for quick blending on each frame, after which the more often called blending parts might become more straightforward |
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| .. | ||
| dvb-sub.c | ||
| dvb-sub.h | ||
| ffmpeg-colorspace.h | ||
| gstdvbsuboverlay.c | ||
| gstdvbsuboverlay.h | ||
| Makefile.am | ||
| TODO | ||