height - me_y is the line from which we read, so it must be strictly
smaller than the frame height. Fixes possible invalid reads in corrupted
files.
Also, use a proper context for logging the error.
CC: libav-stable@libav.org
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
If we encounter an END element before anything is decoded, we would
return success even though the output frame has not been allocated,
which is invalid.
CC: libav-stable@libav.org
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
We need more information from last/cur_frame than from reference
buffers, so we can use a simplified structure for reference buffers,
and then store mvs and segmentation map information in last/cur.
This prepares the decoder for frame threading support.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Not from the underlying frame. Fixes races with frame threading in
field-coded files, where decoding would wait for the wrong field (e.g.
random failures in mixed-nal-coding).
Bug-Id: 954
The frame dimensions are 16bit, so the mv bounds can easily overflow
int16 for large videos.
Bug-Id: Handbrake/46
CC: libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Roughly 25% faster MC than ssse3 for blocksizes 32 and 64.
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
pavgb is an sse integer instruction, so the mmxext flag is enough
Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This reverts commit 25bacd0a0c.
Since 230b1c070, the bytewise AV_W*() macros only expand their
argument once, so revert to the more readable version of these.
Signed-off-by: Martin Storsjö <martin@martin.st>
AV_WB32 can be implemented as a macro that expands its parameters
multiple times (in case AV_HAVE_FAST_UNALIGNED isn't set and the
compiler doesn't support GCC attributes); make sure not to read
multiple times from the source in this case.
Signed-off-by: Martin Storsjö <martin@martin.st>
