Code mostly inspired by vp8's MC, however:
- its MMX2 horizontal filter is worse because it can't take advantage of
  the coefficient redundancy
- that same coefficient redundancy allows better code for non-SSSE3 versions

Benchmark (rounded to tens of unit):
        V8x8  H8x8  2D8x8  V16x16  H16x16  2D16x16
C       445    358   985    1785    1559    3280
MMX*    219    271   478     714     929    1443
SSE2    131    158   294     425     515     892
SSSE3   120    122   248     387     390     763

End result is overall around a 15% speedup for SSSE3 version (on 6 sequences);
all loop filter functions now take around 55% of decoding time, while luma MC
dsp functions are around 6%, chroma ones are 1.3% and biweight around 2.3%.
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

This involves a division that should be a shift.
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

The vertically interpolating variants of these functions read
ahead one line to optimise the loop.  On the last line processed,
this might be outside the buffer.  Fix these invalid reads by
processing the last line outside the loop.
Signed-off-by: NMans Rullgard <mans@mansr.com>

According to the behaviour of librtmp, it is recommended to send this
message to the server after receiving the 'onBWDone' callback in order
to do bandwidth checking and improve compatibility with some servers.

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

This fixes the warning:
cmdutils.c:897: warning: ‘type’ may be used uninitialized in this function

Replace SOL_SCTP by the more portable IPPROTO_SCTP.
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

This is needed to expose some networking APIs.
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

The current SSE version is slower than the MMX version on Athlon64 and Sandy
Bridge, but the SSE4 and AVX versions are faster on Sandy Bridge.

This is easier to follow than having them randomly scattered in
avfilter.c and defaults.c.

Those functions are only useful inside filters. It is better to not
support user filters until the API is more stable.

This breaks audio filtering API and ABI in theory, but since it's
unusable right now this shouldn't be a problem.

There is no real reason for it to be 64bit, it's just a plain int in the
rest of Libav.

There's no reason for it to be explicitly 32 bits. It's declared as a
plain int in all other places in Libav.

This breaks audio filtering API and ABI in theory, but since it's
unusable right now this shouldn't be a problem.

The additional parameters are just complicating the function interface.

Assume that a requested samples buffer will *always* have the format
specified in the requested link.

This breaks audio filtering API and ABI in theory, but since it's
unusable right now this shouldn't be a problem.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Remove AVFilterBufferRefAudioProps.size, and use nb_samples in its place
everywhere.
This is required as the size in the audio buffer may be aligned, so it
may not contain a well defined number of samples.

Also remove the useless planar parameter, which can be deduced from the
sample format.

This is technically an API and ABI break, but since the audio part of
lavfi is not usable now, this should not be a problem in practice.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

This allows compiling the Xvid rate control code without the encoder.

libavcodec/jpeglsdec.c:54:9: warning: variable ‘len’ set but not used

Signed-off-by: NAnton Khirnov <anton@khirnov.net>

This is similar to what has previously been done in AVFrame to allow
dealing with more than 8 channels.

This would happen at least when lavr is used as a fifo with no
conversion.

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

This makes only tests actually using avconv depend on it.
The remaining tests already depend on what they need.
Signed-off-by: NMans Rullgard <mans@mansr.com>