pictordec: pass correct context to avpriv_request_sample

Fixes invalid reads.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry-picked from commit fe9bb61f9a16be19ad91875632c39e44b7a99a8a)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
lavf: avoid integer overflow when estimating bitrate

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit df33a58e5311ee9a64a573889b883a80e981af7b)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
4xm: check that bits per sample is strictly positive

Avoids a divide by zero.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit a7c1689dedd11689edb30088d467ac03f9b8d1cf)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
ape demuxer: check for EOF in potentially long loops

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry-picked from commit 488b2984fece7ad0c2596826fee18e74aa904667)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
alac: Limit max_samples_per_frame

Otherwise buffer size calculations in allocate_buffers could
overflow later, making the code think a large enough buffer
actually was allocated.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit f7c5883126f9440547933eefcf000aa78af4821c)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
matroskadec: Check that .lang was allocated and set before reading it

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 5bcd3ae5b167fb74215520b01d5d810e0c8986ab)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Merge commit 'aade60ab165716523788cd11caf03ae61b40144a' into release/1.1

* commit 'aade60ab165716523788cd11caf03ae61b40144a':
  matroskadec: Check that .lang was allocated and set before reading it
  alac: Limit max_samples_per_frame
  ape demuxer: check for EOF in potentially long loops
  4xm: check that bits per sample is strictly positive
  lavf: avoid integer overflow when estimating bitrate
  pictordec: pass correct context to avpriv_request_sample

Conflicts:
	libavcodec/pictordec.c
	libavformat/matroskadec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/utils: Fix bitrate overflow check

The check added in df33a58e5311ee9a64a573889b883a80e981af7b does not work
at all, rather it broke the summing of bitrates completely.
The comparission was wrong way around.
This commit replaces it by a simpler and hopefully clearer check

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit a5d67bc796e1f9a2b99b43ea807166b655e4bdbc)

Conflicts:

	libavformat/utils.c

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