Fixes ticket #3536.

Fixes CID1197061
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

This function was introduced by ac4b32dfSigned-off-by: NMichael Niedermayer <michaelni@gmx.at>

Further performance improvements and security fixes by
Vittorio Giovara, Luca Barbato and Diego Biurrun.
Signed-off-by: NVittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

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

Fixes overread
Fixes Ticket 3501
Found-by: NPiotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

This simply copies the "interframe without a prior keyframe" check
thats done later into vp7_decode_frame_header()
Found-by: NVittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NPeter Ross <pross@xvid.org>
Reviewed-by: BBB
previous patch reviewed by jason
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NPeter Ross <pross@xvid.org>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NPeter Ross <pross@xvid.org>
Reviewed-by: N"Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

The reason is the same as for e588615d

Based on a patch by Ronald S. Bultje <rsbultje@gmail.com>

mb_layout is either zero or non-zero.
Signed-off-by: NPeter Ross <pross@xvid.org>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

They are not measurably faster on x86, they might be somewhat faster on
other platforms due to missing emu edge SIMD, but the gain is not large
enough to justify the added complexity.

Allow supporting files for which the image stride is smaller than
the maximum block size + number of subpel mc taps, e.g. a 64x64 VP9
file or a 16x16 VP8 file with -fflags +emu_edge.

See: libavcodec/webp.c
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

See b2bed932.

This allows supporting files for which the image stride is smaller than
the max. block size + number of subpel mc taps, e.g. a 64x64 VP9 file
or a 16x16 VP8 file with -fflags +emu_edge.

This prevents emulated_edge_mc from not undoing mvy*stride-related
integer overflows.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Container and lossy decoding by Aneesh Dogra <aneesh@sugarlabs.org>
Lossless decoding by Justin Ruggles <justin.ruggles@gmail.com>

This fixes occasional failures of vp8-test-vector-010 with frame-level
multithreading enabled.
Signed-off-by: NMartin Storsjö <martin@martin.st>

This fixes occasional failures of vp8-test-vector-010 with frame-level
multithreading enabled.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

CC: libav-stable@libav.org
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

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

VP8L, padding and bounds checks by Pascal Massimino
Reviewed-by: NPascal Massimino <pascal.massimino@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Coccinelle profile used:

  @@
  expression r, ctx, f, loglevel, str, flags;
  @@

  -if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
  -    av_log(ctx, loglevel, str);
  -    return r;
  -}
  +if ((r = ff_get_buffer(ctx, f, flags)) < 0)
  +    return r;

  @@
  expression r, ctx, f, loglevel, str;
  @@

  -if ((r = ff_reget_buffer(ctx, f)) < 0) {
  -    av_log(ctx, loglevel, str);
  -    return r;
  -}
  +if ((r = ff_reget_buffer(ctx, f)) < 0)
  +    return r;

  @@
  expression r, ctx, f, loglevel, str, flags;
  @@

  -if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
  -    av_log(ctx, loglevel, str);
  -    return r;
  -}
  +if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
  +    return r;

...along with some manual patches for the remaining ones.

It does not help as an abstraction and adds dsputil dependencies.
Signed-off-by: NRonald S. Bultje <rsbultje@gmail.com>

Move some functions from dsputil. The idea is that videodsp contains
functions that are useful for a large and varied set of video decoders.
Currently, it contains emulated_edge_mc() and prefetch().
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

It's got_frame, not data size

Indexing across array boundaries is not allowed by C99.
Signed-off-by: NMans Rullgard <mans@mansr.com>

while testing a VP8 encoder I found a mismatch between FFMPEG and libvpx
VP8 decoders. The reason for this mismatch is that FFMPEG doesn't reset
loopfilter delta values at keyframes. Patch that fixes the issue is below.
I've verified that the output of ffmpeg after this patch matches libvpx.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

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

Idea stolen from webp (by Pascal Massimino) - because it's Cool.
Signed-off-by: NDerek Buitenhuis <derek.buitenhuis@gmail.com>