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These tables are supposed to contain the number of bits needed to encode a given (run, level) pair. Yet the number of bits for pairs needing the escape code was wrong (it only contained the escape code and not the bits needed for run and level). Furthermore, H.261 (a format with explicit end-of-block codes) does not work well together with the RLTable API from rl.c: The EOB code is the first one in ff_h261_rl_tcoeff's VLC table and has a run value of zero. Therefore the result of get_rl_index() is off by one for run == 0 and level values with explicit (run, level) pair. Fixing this necessitated changing the ref files of the vsynth*-h261-trellis tests. Both filesizes as well as PSNR decreased. If one used a qscale value of 11 for this test, one would have received files with about the same size as before this patch (with qscale 12), but with better PSNR. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
5 lines
287 B
Plaintext
5 lines
287 B
Plaintext
aa3e00ffeb48a23452bb1c5b0dde9e77 *tests/data/fate/vsynth_lena-h261-trellis.avi
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167808 tests/data/fate/vsynth_lena-h261-trellis.avi
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055f8805df2bb21ef6752dc944e7828d *tests/data/fate/vsynth_lena-h261-trellis.out.rawvideo
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stddev: 6.43 PSNR: 31.96 MAXDIFF: 87 bytes: 7603200/ 7603200
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