Based on 19be5fb7 by Luca Barbato.

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Found-by: Luca Barbato
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

It is an internal swscale symbol and thus should not be exported.
Signed-off-by: NAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

This reverts commit 1df908f3. The expected
performance improvements are essentially non-existent.

This patch addresses Trac ticket #5570. The optimized functions are in file
libswscale/ppc/input_vsx.c. Each optimized function name is a concatenation of the
corresponding name in libswscale/input.c with suffix _vsx.
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NDiego Biurrun <diego@biurrun.de>

Removed previous swscale code under '#ifndef NEW_FILTER'
and removed unused fields of SwsContext

./ffmpeg -nostats -f lavfi -i testsrc2=4k:d=2 -vf bench=start,scale=1024x1024,bench=stop -f null -

    before: t:0.489726 avg:0.489883 max:0.491852 min:0.489482
    after:  t:0.256515 avg:0.256458 max:0.256999 min:0.253755

Signed-off-by: NLou Logan <lou@lrcd.com>

Fixes: out of array reads
Fixes: 07e8b9c5d348ccdf7add0f37de20cf6c/asan_heap-oob_27e8df7_6849_e56653f768070ec8cb52f587048444c2.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This makes SWS more robust
Fixes: 07650a772d98aa63b0fed6370dc89037/asan_heap-oob_27ddeaf_2657_2c81ff264dee5d9712cb3251fb9c3bbb.264
Fixes: out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

It is an internal swscale symbol and thus should not be exported.
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Signed-off-by: NAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

When scaling only a slice of a frame the output was written always
in the first lines leaving the rest of the frame black.

The first just does the blending and wouldnt do anything with the colorspace values
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

The new fields can be accessed directly and are more intelligible.
Signed-off-by: NVittorio Giovara <vittorio.giovara@gmail.com>

+added gamma conversion to refactored code

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Process more lines in a single pass to improve performance
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

+ split color conversion from scaling
- disabled gamma correction, until it's refactored too
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Fixes Ticket4746
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This simplifies allocating and initializing swscale contexts with custom options.
The function is internal currently but could be moved into the public header
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

This avoids using up a bit of the public flags
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NVittorio Giovara <vittorio.giovara@gmail.com>