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Black isn't always just memset(ptr, 0, size). Limited YUV in particular requires relatively non-obvious values, and filling a frame with repeating 0 bytes is disallowed in some contexts. With component sizes larger than 8 or packed YUV, this can become relatively complicated. So having a generic function for this seems helpful. In order to handle the complex cases in a generic way without destroying performance, this code attempts to compute a black pixel, and then uses that value to clear the image data quickly by using a function like memset. Common cases like yuv410p10 or rgba can't be handled with a simple memset, so there is some code to fill memory with 2/4/8 byte patterns. For the remaining cases, a generic slow fallback is used. Signed-off-by: Anton Khirnov <anton@khirnov.net> |
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| doxy | ||
| examples | ||
| .gitignore | ||
| APIchanges | ||
| avconv.texi | ||
| avplay.texi | ||
| avprobe.texi | ||
| avtools-common-opts.texi | ||
| avutil.txt | ||
| bitstream_filters.texi | ||
| build_system.txt | ||
| decoders.texi | ||
| demuxers.texi | ||
| developer.texi | ||
| doxy-wrapper.sh | ||
| Doxyfile | ||
| encoders.texi | ||
| eval.texi | ||
| faq.texi | ||
| fate.texi | ||
| filters.texi | ||
| general.texi | ||
| git-howto.texi | ||
| git-howto.txt | ||
| indevs.texi | ||
| libavfilter.texi | ||
| Makefile | ||
| metadata.texi | ||
| multithreading.txt | ||
| muxers.texi | ||
| nut.texi | ||
| optimization.txt | ||
| outdevs.texi | ||
| platform.texi | ||
| print_options.c | ||
| protocols.texi | ||
| rate_distortion.txt | ||
| RELEASE_NOTES | ||
| soc.txt | ||
| swscale.txt | ||
| t2h.init | ||
| tablegen.txt | ||
| texi2pod.pl | ||
| viterbi.txt | ||