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store the number of runs to avoid storing the last run value

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about 10% lower bitrate for -qscale 32 (forman & some music video)
worst case bitrate increase <0.1% (lossless or low qscale)
and now the bad news, even though this just adds a single subtraction and an if() into the medium sized unpack_coeffs() loop and the if() will only be false once per unpac_coeff() call, gcc produces 50% slower code, i didnt look at the generated asm yet, not sure if i want to ...

Originally committed as revision 4131 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2005-04-15 13:24:30 +00:00
parent 2cd340438a
commit b44985ba12
3 changed files with 22 additions and 13 deletions
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8
tests/ffmpeg.regression.ref
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@ -119,12 +119,12 @@ a7ef4746f27be309138c188e327d3ebe *./data/a-ffv1.avi
2653642 ./data/a-ffv1.avi
799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
stddev: 0.00 PSNR:99.99 bytes:7602176
98f6913d98bccb4ba4829ccde7286e8f *./data/a-snow.avi
1266766 ./data/a-snow.avi
24c1fcbcdb08052359679700056ef4e5 *./data/a-snow.avi
1267526 ./data/a-snow.avi
575fdd879119902a8289c825c2389dca *./data/out.yuv
stddev: 2.96 PSNR:38.67 bytes:7602176
28b6a82fdd8058e2df35778c9a5edbbf *./data/a-snow53.avi
3537074 ./data/a-snow53.avi
0c570833b736a8d4c8c428bf6e82272f *./data/a-snow53.avi
3537490 ./data/a-snow53.avi
799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
stddev: 0.00 PSNR:99.99 bytes:7602176
b5b6275f58f012de73644bbaa9080097 *./data/a-svq1.mov