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| author | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2012-08-11 14:15:09 +0200 |
|---|---|---|
| committer | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2012-08-12 23:23:19 +0200 |
| commit | 118bd609f048f457cf42d358a07510b87626f316 (patch) | |
| tree | 752a186823b7483c0eb9ed6117367a40a30f3cbb /libswscale/swscale_unscaled.c | |
| parent | bb7073921c75b1b4f793fca5123f42ac0da0b9b6 (diff) | |
| download | ffmpeg-118bd609f048f457cf42d358a07510b87626f316.tar.gz | |
Optimized unscaled yuvp9/yuvp10 -> yuvp16 conversion.
About 30% faster on 32 bit Atom, 120% faster on 64 bit Phenom2.
This is interesting because supporting P16 is easier in e.g.
OpenGL (can misuse support for any 2-component 8 bit format),
whereas supporting p9/p10 without conversion needs a texture
format with at least 14 bits actual precision.
The shiftonly == 0 case is not optimized since the code is more
complex and the speed gain less obvious.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Diffstat (limited to 'libswscale/swscale_unscaled.c')
| -rw-r--r-- | libswscale/swscale_unscaled.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/libswscale/swscale_unscaled.c b/libswscale/swscale_unscaled.c index c391a07d51..9180f2eb5c 100644 --- a/libswscale/swscale_unscaled.c +++ b/libswscale/swscale_unscaled.c @@ -830,7 +830,34 @@ static int planarCopyWrapper(SwsContext *c, const uint8_t *src[], srcPtr += srcStride[plane]; } } else if (src_depth <= dst_depth) { + int orig_length = length; for (i = 0; i < height; i++) { + if(isBE(c->srcFormat) == HAVE_BIGENDIAN && + isBE(c->dstFormat) == HAVE_BIGENDIAN && + shiftonly) { + unsigned shift = dst_depth - src_depth; + length = orig_length; +#if HAVE_FAST_64BIT +#define FAST_COPY_UP(shift) \ + for (j = 0; j < length - 3; j += 4) { \ + uint64_t v = AV_RN64A(srcPtr2 + j); \ + AV_WN64A(dstPtr2 + j, v << shift); \ + } \ + length &= 3; +#else +#define FAST_COPY_UP(shift) \ + for (j = 0; j < length - 1; j += 2) { \ + uint32_t v = AV_RN32A(srcPtr2 + j); \ + AV_WN32A(dstPtr2 + j, v << shift); \ + } \ + length &= 1; +#endif + switch (shift) + { + case 6: FAST_COPY_UP(6); break; + case 7: FAST_COPY_UP(7); break; + } + } #define COPY_UP(r,w) \ if(shiftonly){\ for (j = 0; j < length; j++){ \ |