Based on a patch by Michael Niedermayer <michaelni@gmx.at>

Fixes NGS00145, CVE-2011-4352

Found-by: Phillip Langlois
Signed-off-by: Reinhard Tartler <siretart@tauware.de>

Fixes NGS00148, CVE-2011-4579

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

Fixes compilation on FreeBSD with clang 3.

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

Also add "volatile" to broadcast flag (since it is used from
multiple threads).

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Fixes bugzilla #135

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

A negative number of threads does not make sense and 0 is used for
autodetection. Adds a symbolic name for autodetection.

Use sched_getaffinity to determine the number of logical CPUs.
Limits the number of threads to 16 since slice threading of H.264
seems to be buggy with more than 16 threads.

This file does not use anything from get_bits.h but needs
intreadwrite.h.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

The prefix is a historic remnant that probably meant "alternative".
Now that the A32 bitstream reader has been dropped it makes no sense anymore.

fixes use of uninitialized values if the filter is still unstable after using
the previous frame lpc coefficients.

The 'fiel' atoms can be found in H.264 tracks clobbering the extradata.
MJPEG supports non field based extradata, and this data should be
preserved when copying.

fixes Bug 171

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

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

Also define a codec capability for codecs that can handle
parameters changed externally between decoded packets.

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

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

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

On 32-bit OS X with gcc 4.0/4.2 and shared libraries enabled, the ebx register
is not available, but required to assemble the functions.

This reverts commit 8742a4f to a simplified version of the original constraints.

The definition and the call site where under different #ifdefs.

This fixes a deadlock VLC triggered with multithreaded decoding. The
wait forces one of the current waiters to wake and not the thread
which calls pthread_cond_signal() itself.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Remove unused function argument.
Return an AVERROR.
Don't zero out ICS on failure.

Interlaced content for most codec requires it.
This patch is a stop-gap pending a serious rework to support
codecs with non 16 pixel macroblocks.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

libavcodec/mpegvideo_enc.c:1209: warning: ISO C90 forbids mixed declarations and code

The encoder depends on the common code, so link against it.

The generic ADPCM codes depends on the ADPCM data tables.

Fixes Bug 110.

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

This fixes warnings about assignment from incompatible
pointer type.

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

Trailing bits are likely to be non-zero if the NAL unit is truncated.
Clearing the bits make overreads of the bitstream less likely in this
case. Fixes playback of
http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4 which
has a forbidden byte sequence of 0x00 0x00 0x00 in it SPS.

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

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

Signed-off-by: Diego Biurrun <diego@biurrun.de>

This reverts commit 87eebb3454.

Start code emulation prevention is only required in Annex B bytestream
packed NAL units. For other coding formats the size is already known.
Looking for a start code prefix can result in false positives like in
http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4
which has a false positive in the SPS.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Width and height might get passed as 0 and would cause floating point
exceptions in decode_frame.
Fixes bugzilla #149

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

This was intended as an optimisation for skipped blocks in MPEG2
P-frames and never used elsewhere.  Removing this "optimisation"
speeds up MPEG2 decoding by 1-2% (ARM Cortex-A9).

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