generic-library/ffmpeg
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13 Commits

Author SHA1 Message Date
Michael Niedermayer
b1fdf81c6e avcodec/jpeg2000dwt: use 32x32->64 multiplies in the 9/7i DWT 
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 
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
Michael Niedermayer
75651cd63f avcodec/jpeg2000dwt: Fix order of operations in integer decomposition wavelets 
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 
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 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-17 20:39:03 +02:00
Michael Niedermayer
7c3f7e6ed1 avcodec/jpeg2000dwt: Support 9/7 singularity cases on the encoder side 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-17 15:24:14 +02:00
Michael Niedermayer
9841024402 avcodec/jpeg2000dwt: More special cases to handle singularities in 9/7 decode 
Fixes Ticket4634

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-17 15:07:50 +02:00
Michael Niedermayer
adfde9a646 avformat/avienc: Fix wrongly placed comment 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-03-19 17:30:28 +01:00
Carl Eugen Hoyos
e705d0ce1c Set dwSuggestBufferSize to largest chunk size for every stream in avi. 
Fixes playback with WMP 9 for files with large (rawvideo) frames
as explained in ticket #2145.

Fixes ticket #2818.
 2014-05-19 00:05:40 +02:00
Michael Niedermayer
8a266aaaac avcodec/jpeg2000dwt: merge rescaling with interleave in 9/7 int IDWT 
Tha fate tests change because the edge mirroring was wrong before this commit

Reviewed-by: Nicolas BERTRAND <nicoinattendu@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-06-03 13:24:20 +02:00
Michael Niedermayer
9d56ccf5af j2k/jpeg2000dec: merge 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-05-31 03:10:08 +02:00