Carl Eugen Hoyos
0f5b996531
lavc/j2kenc: Make jp2 output compatible with Kakadu.
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Fixes ticket #4689 .
2015-06-30 15:00:38 +02:00
Michael Niedermayer
96e73fa649
avcodec/jpeg2000dec: Merge i_stepsize/2 decoder special case into dequant
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-28 15:26:31 +02:00
Michael Niedermayer
b1fdf81c6e
avcodec/jpeg2000dwt: use 32x32->64 multiplies in the 9/7i DWT
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This significantly improves the quality when the integer 9/7 transform
is used
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-22 02:27:50 +02:00
Michael Niedermayer
6c7b1597c7
avcodec/jpeg2000: Move H band scaling from wavelet into quantization code
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This reduces the number of operations done and is equivalent except for
rounding
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-22 02:00:57 +02:00
Michael Niedermayer
1c495b0bf6
avcodec/jpeg2000: Move gainb handling into the quantization code
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thats how the specification defines it, this also improves numerical
accuracy of the integer wavelet implementation. It otherwise should
be equivalent, in case of overflows this can be reverted.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-22 01:36:05 +02:00
Michael Niedermayer
3bcf61f495
avcodec/jpeg2000dwt: Fix value of F_LFTG_X and I_LFTG_X
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Even if the jpeg2000 spec uses a wrong value this does not
make mathematics work this way, also this has been corrected in the 2004
version AFAIK
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-21 19:25:35 +02:00
Michael Niedermayer
75651cd63f
avcodec/jpeg2000dwt: Fix order of operations in integer decomposition wavelets
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-20 00:53:56 +02:00
Michael Niedermayer
7e2bdea764
avcodec/j2kenc: Use JP2 format by default
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Without the JP2 fields its not possible to identify the colorspace
Fixes Ticket538
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-19 21:56:57 +02:00
Michael Niedermayer
4624656797
avcodec/j2kenc: Properly flush the end of the truncated AC stream
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-17 20:39:03 +02:00
Michael Niedermayer
adfde9a646
avformat/avienc: Fix wrongly placed comment
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-03-19 17:30:28 +01:00
Christophe Gisquet
8d02a55b1b
tests: add a third, 34x34, target
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This should exercise the corner cases of numerous codecs.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-06-10 20:24:49 +02:00
