In 16-bit arithmetic, x * 0xffffc is simply x * -4 with extra overflows,
(and the constant was probably meant to be 0xfffc).  Combined with the
shift, this simplifies to -x >> 1.  Finally, clearing the low two bits
with a 32-bit mask and switching to a 32-bit type allows more efficient
code on 32-bit machines.
Signed-off-by: NMans Rullgard <mans@mansr.com>

(x << 2) - x is just an optimisation of 3 * x the compiler is
perfectly capable of doing on its own.
Signed-off-by: NMans Rullgard <mans@mansr.com>

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

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

Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

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

The condition is trivially true, but keeping the assert() is
sensible to avoid FFM_HEADER_SIZE ever getting out of sync with
the actual code.
Signed-off-by: NMans Rullgard <mans@mansr.com>

The only compiler I have that does not define the standard
offsetof() macro is "Bruce's C Compiler", a simple compiler
for producing 8/16-bit 8086 code, usually for use in early
stages of PC booting.
Signed-off-by: NMans Rullgard <mans@mansr.com>

This list is incomplete (we also use UINT16_MAX), so there does
not appear to be any system we care about that needs these.
Signed-off-by: NMans Rullgard <mans@mansr.com>

This fixes build failures on debian/kfreebsd, which has the
sctp.h header, but it is currently broken (a cpp test succeeds,
but a compile test fails), see http://bugs.debian.org/684330 for
details.

Also remove the checked item from HAVE_LIST, since the corresponding
HAVE_* define isn't used by the source code.
Signed-off-by: NMartin Storsjö <martin@martin.st>

This function is only ever called through a function pointer,
so marking it inline makes no sense.
Signed-off-by: NMans Rullgard <mans@mansr.com>

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

At both places this function is called, mb_[xy] == s->mb_[xy]
making the call together with following code equivalent to
simply assigning zeros.
Signed-off-by: NMans Rullgard <mans@mansr.com>

About 2x speedup going from 1 to 2 threads.
1.7s to 0.85s on foreman CIF.
Signed-off-by: NJanne Grunau <janne-libav@jannau.net>

Even though HOSTOBJS are not referenced directly in subdirectory Makefile
snippets right now, robustness requires resetting the variable contents.

The main benefit of inlining this function is from constant
propagation for the 'field_based' argument.  Instead of inlining
all calls, create two versions of the function for field_based
values of 0 and 1.
Signed-off-by: NMans Rullgard <mans@mansr.com>

This file defines a single, huge function, MPV_motion(), which
although being declared inline is not actually inlined by the
compiler (for good reason).  There is thus no sense in defining
this function in a header file, resulting in multiple copies of
it in the final library.
Signed-off-by: NMans Rullgard <mans@mansr.com>

This adds a hidden config variable for the mpegvideo.o dependency
and selects from the codecs which require it.
Signed-off-by: NMans Rullgard <mans@mansr.com>

This macro is only used in two places, both in libavcodec, so this
is a more sensible place for it.

Two small tweaks to the macro are made:

- removing the trailing semicolon
- dropping unnecessary 'volatile' from the x86 asm
Signed-off-by: NMans Rullgard <mans@mansr.com>

These x86-specific macros do not belong in generic code.
Signed-off-by: NMans Rullgard <mans@mansr.com>

This puts x86-specific things in the x86/ subdirectory where they
belong.
Signed-off-by: NMans Rullgard <mans@mansr.com>

Fixes MP4 files where the first frame is broken.

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

This is basically the same way as mpegts packets are parsed in
rtpdec.c.
Signed-off-by: NMartin Storsjö <martin@martin.st>

EvoStream Media Server can serve data in this format, and
VLC/live555 already supports it.
Signed-off-by: NMartin Storsjö <martin@martin.st>

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

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

It is now possible to use lavfi sources.

The new name is shorter and more accurate, since this variable is no
longer used only for checking recording time constraint.