4 Commits

Author	SHA1	Message	Date
Michael Niedermayer	6c7b1597c7	avcodec/jpeg2000: Move H band scaling from wavelet into quantization code ... 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 ... 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 ... 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
Nicolas Bertrand	c81a706381	JPEG 2000 decoder for DCinema ... Based on the 2007 GSoC project from Kamil Nowosad <k.nowosad@students.mimuw.edu.pl> Updated to current programming standards, style and many more small fixes by Diego Biurrun <diego@biurrun.de>. Signed-off-by: Diego Biurrun <diego@biurrun.de>	2013-04-22 15:38:29 +02:00