Make av_pix_fmt_descriptors table static on next major bump.

Making the table public is dangerous, since the caller has no way to
know how large it actually is. It also prevents adding new fields to
AVPixFmtDescriptor without a major bump.

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

This avoids having to overestimate the md5 context size, which
isn't known beforehand, allowing us to use the new allocate functions
instead.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

The current API where the plain size is exposed is not of much
use - in most cases it is allocated dynamically anyway.

If allocated e.g. on the stack via an uint8_t array, there's no
guarantee that the struct's members are aligned properly (unless
the array is overallocated and the opaque pointer within it
manually aligned to some unspecified alignment).
Signed-off-by: Martin Storsjö <martin@martin.st>

Fixes:
libavcodec/svq3.c:661:9: warning: passing argument 2 of 'svq3_decode_block' from incompatible pointer type
libavcodec/svq3.c:208:19: note: expected 'DCTELEM *' but argument is of type 'DCTELEM (*)[32]'
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

- make tables static const
- remove useless use of compound literal
- break long lines
- fix a comma/semicolon typo
Signed-off-by: Mans Rullgard <mans@mansr.com>

The const qualifier is still removed although it happens inside
the strtol() function so no warning is generated.

Fixes:
libavutil/parseutils.c:110:11: warning: assignment discards qualifiers from pointer target type
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

URLProtocols are private and custom AVIOContexts are a simple and
easier solution for most of the situations.

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

Fixes stupid mistake in 25227c3a.

The Microsoft linker uses the LIB environment variable which
clashes with a make variable of the same name.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

Replace the single use of THIS_LIB with its value.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This was part of a ghastly hack that is long since gone.
Signed-off-by: Mans Rullgard <mans@mansr.com>

A number of compilers, for example those from TI and IBM, choke on
these initialisers.  The current style is also quite ugly.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Fixes CID717493.

Fixes bogus uninitialized value compiler and coverity warnings.

Fixes CID732275.

The existing code is not in the right place and it should cover both
interlaced frame and field pictures.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This is required due to the way VC-1 handles chroma pull-back which may end
up causing negative chroma MV for zero luma MV. Edge emulation needs to be
invoked in such cases.

This only affects vertical component of chroma motion vector.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Interlaced field pictures can have one or two reference pictures, signaled
by NUMREF syntax element. For single reference pictures, reference picture
is determined by REFFIELD syntax element.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>