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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2015-10-12 10:16:56 -0400 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2015-10-13 11:05:58 -0400 |
| commit | 235e76aeb877bd1b23c12e74588e86752e3dfbe7 (patch) | |
| tree | cd581f35599535342d7ba9d1495dc32c1e520d71 /doc/examples/demuxing_decoding.c | |
| parent | f76423d0975dae4bb2513e6b20be2a7803fd7019 (diff) | |
| download | ffmpeg-235e76aeb877bd1b23c12e74588e86752e3dfbe7.tar.gz | |
vp9: initial attempt at a idct_idct_4x4 12bpp x86 simd (sse2) impl.
The trouble with this function is that intermediates overflow 31+sign
bits, so I've added some helpers (that will also be used in 10/12bpp
8x8, 16x16 and 32x32) to make that easier, basically emulating a half-
assed pmaddqd using 2xpmaddwd. It's currently sse2-only, if anyone sees
potential in adding ssse3, I'd love to hear it.
Diffstat (limited to 'doc/examples/demuxing_decoding.c')
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