Also give consistent names to init functions.

Also give consistent names to init functions.

Also add missing ff_ prefixes where necessary.

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>
Signed-off-by: NDerek Buitenhuis <derek.buitenhuis@gmail.com>

Signed-off-by: NMartin Storsjö <martin@martin.st>

Also adjust some comments including wording and typo fixes.

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>
Signed-off-by: NDerek Buitenhuis <derek.buitenhuis@gmail.com>

Fixes overflows for large image sizes.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org

Revert "swscale: update context offsets after removal of AlpMmxFilter."
(commit a95e3fa9)
and
Revert "swscale: Remove some write-only variables related to alpha handling."
(commit 9d03cb9f).

They broke alpha handling - it's the evil inline asm that still uses that
variable, so it's not truely write-only.

This makes it possible to dintinguish them from PAL8.

Fixes an invalid write in avpicture_layout().

It is obscure, most likely unused and not bit-exact compared to
libavcodec due to a different IDCT transform algorithm.

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

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

Fixes PAL8 to YUV conversion.

isGray() is left as a FIXME for later.

Signed-off-by: NRonald S. Bultje <rsbultje@gmail.com>

Signed-off-by: NRonald S. Bultje <rsbultje@gmail.com>

This allows using more specific implementations for chroma/luma, e.g.
we can make assumptions on filterSize being constant, thus avoiding
that test at runtime.

This reverts commit ac0fb593. It
causes valgrind errors which I'll want to investigate before
resubmitting this.

ptrdiff_t can be 4 bytes, which leads to the next element being 4-byte
aligned and thus at a different offset than intended. Forcing 8-byte
alignment forces equal offset of dither16/32 on x86-32 and x86-64.
Signed-off-by: NRonald S. Bultje <rsbultje@gmail.com>

Based on a somewhat similar idea in FFmpeg's swscale copy.

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

Signed-off-by: NMans Rullgard <mans@mansr.com>