Glibc 2.20 onwards generates a deprecation warning for usage of _BSD_SOURCE and _SVID_SOURCE.
The solution from man feature_test_macros is to define both _DEFAULT_SOURCE and the old macros.
This solution is on the lines of the one in commit af181827.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This fixes -Wshift-negative-value reported with clang 3.7+, e.g
http://fate.ffmpeg.org/log.cgi?time=20150918181527&log=compile&slot=x86_64-darwin-clang-polly-vectorize-stripmine-3.7.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

hyscale, hcscale are only used in old filter code, hence place
header guard to silence -Wunused-function.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

gamma_convert is only used with the old code. Thus, it is
placed under a header guard. This patch silences a -Wunused-function
observed on GCC 5.2.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

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

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

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

Its illogic to handle gray differently depending on the existence of an alpha channel
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

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

+added gamma conversion to refactored code

swscale/utils: If cascaded contexts are used forward sws_setColorspaceDetails() to the first context
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This uses a RGB intermediate, a more optimal solution would be to perform the rematrixing
directly in subsampled YUV, this is quite a bit more complicated though

Fixes Ticket4805
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Deprecated in 07/2012.

Also remove a pair of extraneous ifdeffery.

Commit 7c72a4bb was slightly wrong
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

Found-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

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

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

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

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

Found-by: Pedro Arthur <bygrandao@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

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

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

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

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

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

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

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

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