* commit '067432c1':
  loco: check that there is data left after decoding a plane.
  lagarith: avoid infinite loop in lag_rac_refill()

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

* commit 'f935aca4':
  av_memcpy_backptr: avoid an infinite loop for back = 0
  4xm: check the return value of read_huffman_tables().

Conflicts:
	libavcodec/4xm.c
	libavutil/mem.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The following commit:
b97d61f9 avfilter/ff_merge_formats: only merge if doing so does not loose chroma or alpha
introduced an exception to avoid lossy conversions.
Add a comment to explain the logic.
Fix the call to avoid applying it on audio formats.

Fix trac ticket #2139.

Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This allows more complete checks
Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Otherwise even a tiny file can trigger a huge memory allocation.

Related to ticket #2298.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

This significantly reduces the memory needed per AVStream when the
array is not needed.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes out of array accesses
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes ticket2140
Fixes null pointer dereference
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes second part of Ticket2292
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket2292
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

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

Also ensure that format is valid in query_formats
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

CC:libav-stable@libav.org

range == 0 happens with corrupted files

CC:libav-stable@libav.org

CC:libav-stable@libav.org

CC:libav-stable@libav.org

"12:34" is now valid syntax.

In particular, fix warnings:
*** Undefined node `quoting_and_escaping' in @ref (in doc/muxers.texi l. 767)
*** Undefined node `quoting_and_escaping' in @ref (in doc/muxers.texi l. 772)

Fix trac ticket #2258.
Signed-off-by: Senthilnathan M <senthilnathan.maadasamy@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Avoid searching for the lowest bulk cost for each pixel that isn't a repeat/skip. Instead store the lowest cost as we go along each pixel, and use it as needed.
Signed-off-by: Malcolm Bechard <malcolm.bechard@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

These can detect some kinds of memory and or pointer corruptions
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

get_header_variable_length() already check for
out of array read and returns 0 in such case.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

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

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

Also read data size for raw compressions too and
make sure its value is sane.

Remove code that fills missing blocks with zeroes.
It is marginally useful and make implementation
of actually useful features harder.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

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