It allows to check whether an AVCodecContext is open in a documented
way. Right now the undocumented way this check is done in lavf/lavc is
by checking whether AVCodecContext.codec is NULL. However it's desirable
to be able to set AVCodecContext.codec before avcodec_open2().

It's only used by raw demuxers for storing the codec id.

The demuxers don't use it in any way.

Put all private fields at the end and mark them as such so they can be
easily changed/removed.

This breaks ABI.

Put all private fields at the end and mark them as such so they can be
easily changed/removed.

This breaks ABI.

In some cases, what is left to read from ptr is smaller than EXTRABYTES.

Based on a patch by Thierry Foucu <tfoucu@gmail.com>.
Signed-off-by: NAlex Converse <alex.converse@gmail.com>

Add FF_INPUT_BUFFER_PADDING_SIZE.
If allocation fails, also free memory which was allocated previously in
adpcm_encode_init().

It is already set in avcodec_alloc_frame().

DSPContext.bswap_buf() requires aligned output

Provide MMX, SSE2 and SSSE3 versions, with a fast-path when the weights are
multiples of 512 (which is often the case when the values round up nicely).

*_TIMER report for the 16x16 and 8x8 cases:
C:
9015 decicycles in 16, 524257 runs, 31 skips
2656 decicycles in 8, 524271 runs, 17 skips
MMX:
4156 decicycles in 16, 262090 runs, 54 skips
1206 decicycles in 8, 262131 runs, 13 skips
MMX on fast-path:
2760 decicycles in 16, 524222 runs, 66 skips
995 decicycles in 8, 524252 runs, 36 skips
SSE2:
2163 decicycles in 16, 262131 runs, 13 skips
832 decicycles in 8, 262137 runs, 7 skips
SSE2 with fast path:
1783 decicycles in 16, 524276 runs, 12 skips
711 decicycles in 8, 524283 runs, 5 skips
SSSE3:
2117 decicycles in 16, 262136 runs, 8 skips
814 decicycles in 8, 262143 runs, 1 skips
SSSE3 with fast path:
1315 decicycles in 16, 524285 runs, 3 skips
578 decicycles in 8, 524286 runs, 2 skips

This means around a 4% speedup for some sequences.
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

This fixes some unused variable warnings with YASM disabled.

This makes the first packet of a track fragment run to get
the keyframe flag set properly if sample_degradation_priority
is nonzero.

This makes the keyframes flag be set properly for ismv files
created by Microsoft.
Signed-off-by: NMartin Storsjö <martin@martin.st>

Previously, we've only passed the key string on to the recursive
amf_parse_object for the mixedarray type, not for 'object'. By
passing the key string on, the recursive amf_parse_object can
store the amf objects as metadata.

This kind of data was seen in data from XSplit Broadcaster, received
over RTMP via Wowza. This patch allows reading this metadata.
Signed-off-by: NMartin Storsjö <martin@martin.st>

Its quality is horrible, yadif should always be used instead.

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

Currently, any samples in the final frame are not decoded because they are
only represented by one frame instead of two. So we encode two final frames to
cover both the analysis delay and the MDCT delay.

Fixes handling of CODEC_CAP_SMALL_LAST_FRAME.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

There are many places where we read an unchecked 4-bit index into it.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

Fixes CVE-2011-3945

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 807a045a)
Signed-off-by: NAlex Converse <alex.converse@gmail.com>

Fixes: CVE-2011-3952

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Based on fix by Michael Niedermayer

Related to CVE-2011-3940.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

Check results for av_malloc() and fix an overflow in one call.

Related to CVE-2011-3940.

Based in part on work from Michael Niedermayer.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

Fixes CVE-2011-3940 (Out of bounds read resulting in out of bounds write)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 5c011706)
Signed-off-by: NAlex Converse <alex.converse@gmail.com>

Also add spacing around operators on touched lines, and split
one line to match the common style.
Signed-off-by: NMartin Storsjö <martin@martin.st>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>
Signed-off-by: NRonald S. Bultje <rsbultje@gmail.com>

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

While pshufb allows emulating bswap on XMM registers for SSSE3, more
shuffling is needed for SSE2. Alignment is critical, so specific codepaths
are provided for this case.

For the huffyuv sequence "angels_480-huffyuvcompress.avi":
C (using bswap instruction): ~ 55k cycles
SSE2:                        ~ 40k cycles
SSSE3 using unaligned loads: ~ 35k cycles
SSSE3 using aligned loads:   ~ 30k cycles
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

The functions are already av_ prefixed and intfloat header is already provided.
Install libavutil/intfloat.h
Signed-off-by: NPaul B Mahol <onemda@gmail.com>
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Give the exact aspect ratios when there is a mismatch between encoder
and muxer.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>