Deprecate corresponding AVFormatParameters field.

This will be useful in the following commit.

This will be useful in the following commit.

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

The volatile qualifiers are not needed on these statements as
their effects are fully specified by constraints.
Signed-off-by: NMans Rullgard <mans@mansr.com>

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

Fixes build.

Signed-off-by: NMike Williams <mike@mikebwilliams.com>
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

The flag is required for some C99 math functions to be declared.

Preparatory step to implement support for sizes > VOFW.

This allows to convert between formats of arbitrary width,
regardless of the value of VOF/VOFW.

Many functions have such a prefix, but do not actually use any
instructions or features from that set, thus giving the false
impression that swscale is highly optimized for a particular
system, whereas in reality it is not.

Interleave macros and code so that it's easier to find the
actual code that belongs to a function. Also reindent where
appropriate and remove dead code.

This allows cutting up the function in much smaller and easier-
to-maintain chunks.