rv34: set mb_num_left to 0 after finishing a frame

Prevents running error resilience on a previous frame which will write
to the pic->mb_type[] array of the previous image. The array might
already be re-used for a new image in a subsequent thread, thus cause
two threads to write to the same pic->mb_type[] array, causing a race
condition which can crash in rv34_decode_cbp(), called by
rv34_decode_inter_mb_header() (which accesses mb_type[] twice,
assuming values are maintained, which the race condition breaks).

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
targa: convert to bytestream2.

Also remove some write-only variables or write-only variable
assignments, remove internal colorspace conversion to native
endianness (that can be done by swscale much more efficiently),
and some cosmetics.
vc1: Do not read from array if index is invalid.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
mpegts: Fix dead error checks
make av_interleaved_write_frame() flush packets when pkt is NULL

This patch allows the user to force flushing of all queued packets
by calling av_interleaved_write_frame() with pkt set to NULL.

Signed-off-by: Jindrich Makovicka <jindrich.makovicka@nangu.tv>
Signed-off-by: Martin Storsjö <martin@martin.st>
configure: Drop stray duplicate entry for --disable-fft from help output.
build: fix RALF decoder standalone compilation, which depends on Golomb code
dv: Split off DV video decoder into its own file.
build: Do not explicitly add the doc directory to the OBJDIRS list.

Now that a documentation generator is built in the doc directory,
this is no longer necessary.  Fixes the Make warning:
Makefile:188: target `doc' given more than once in the same rule.
raw: forward avpicture_fill() error code in raw_decode().

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
westwood_vqa: set video stream duration

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
westwood_vqa: fix SND0 chunk handling

Version from vqa header does not dictate which sound chunks may
appear in file.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
oggdec: calculate correct timestamps in Ogg/FLAC

We need to parse the individual packet durations when there is more than one
packet in a page.
fate: add kgv1 fate test.

Tested to be bit-exact across x86-64, x86-32 and ppc.
FATE: add a test for vp8 with changing frame size.
avcodec_encode_{audio,video}: only reallocate output packet when it has non-zero size.

Otherwise realloc would free it, which would result in double free
later.
dvenc: print allowed profiles if the video doesn't conform to any of them.
faandct: Remove FAAN_POSTSCALE define and related code.

It is not a user-accessible option and unlikely to ever be changed.
Replace memset(0) by zero initializations.

Also remove one pointless zero initialization in rangecoder.c.
build: fix doc generation errors in parallel builds

The $(dir) function used to construct OBJDIRS includes a trailing slash
in the names returned, which GNU make 3.82 does not match to the
slash-less 'doc' in the documentation dependencies, causing parallel
build to fail.  Adding a slash fixes this and still works with make
3.81.

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