Solution based on rational.c, which uses isinf() too

This should fix compilation with msvc
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Simplify.

Avoid implicit int->unsigned conversion, causing invalid access in case
of negative linesize.

Fix crash with:
ffplay -f lavfi testsrc,vflip

Allow to set a ratio as "a:b" (with proper escaping), and correctly
honour the max parameter.

Set select->select internally to the function, avoid lossy double->int
conversion causing spurious frame drop (e.g. in case the evaluation
result is positive and less than 1).

* cigaes/master:
  lavfi/buffersrc: fix failed requests count.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Should fix pgc warning
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Linesizes that did not match output width produced several artifacts.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

* qatar/master:
  indeo3: check motion vectors.

Conflicts:
	libavcodec/indeo3.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

* commit '34e6af9e':
  indeo3: fix data size check
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '66531d63':
  indeo3: switch parsing the header to bytestream2

Conflicts:
	libavcodec/indeo3.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '01d376f5':
  rv10: check that extradata is large enough
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'bac8d38c':
  rv10: return meaningful error codes.

Conflicts:
	libavcodec/rv10.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '69f6f03c':
  rv10: cosmetics, reformat
  qdm2: check that the FFT size is a power of 2

Conflicts:
	libavcodec/rv10.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ecff5acb':
  svq1dec: clip motion vectors to the frame size.

Conflicts:
	libavcodec/svq1dec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b1bb8fb8':
  svq1dec: check that the reference frame has the same dimensions as the current one

Conflicts:
	libavcodec/svq1dec.c

See: 3b57bb47Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c0771a1a':
  af_channelmap: cosmetics, use an extra local variable to shorten the code
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'aafed117':
  af_channelmap: sanity check input channel indices in all cases.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

The data offsets are relative to the bistream header, which is 16 bytes
after the start of the data.
Fixes invalid reads with corrupted files.

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

Also add an additional sanity check to the alt_quant table.
Fixes invalid reads with corrupted files.

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