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ffmpeg/libavcodec/aarch64
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Janne Grunau 180f8216cd aarch64: vp9mc: Load only 12 pixels in the 4 pixel wide horizontal filter 
This reduces the amount the horizontal filters read beyond the filter
width to a consistent 1 pixel. The data is not used so this is usually
not noticeable. It becomes a problem when the application allocates
frame buffers only for the aligned picture size and the end of it is at
a page boundary. This happens for picture sizes which are a multiple of
the page size like 1280x640. The frame buffer allocation is based on
its most likely done via mmap + MAP_ANONYMOUS so start and end of the
buffer are page aligned and the previous and next page are not
necessarily mapped.
Under these conditions like seen by Firefox a read beyond the end of the
buffer results in a segfault.
After the over-read is reduced to a single pixel it's reasonable to use
VP9's emulated edge motion compensation for this.

Fixes: https://bugzilla.mozilla.org/show_bug.cgi?id=1881185
Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 430c38f698)
2025-01-04 07:28:47 -05:00
..
aacpsdsp_init_aarch64.c lavc/aacpsdsp: use ptrdiff_t for stride in hybrid_analysis 2017-06-28 12:22:39 +02:00
aacpsdsp_neon.S lavc/aacpsdsp: use ptrdiff_t for stride in hybrid_analysis 2017-06-28 12:22:39 +02:00
asm-offsets.h Merge commit '705f5e5e15' 2016-01-02 11:14:28 +01:00
cabac.h Merge commit 'dfe224f377' 2014-03-09 13:27:04 +01:00
fft_init_aarch64.c Merge commit '97aec6e75e' 2016-04-12 15:43:09 +01:00
fft_neon.S Merge commit '780cd20b00' 2014-12-09 12:08:29 +01:00
fmtconvert_init.c Merge commit 'a0fc780a20' 2016-01-02 11:21:16 +01:00
fmtconvert_neon.S Merge commit 'a0fc780a20' 2016-01-02 11:21:16 +01:00
h264chroma_init_aarch64.c Merge commit 'e4a94d8b36' 2017-03-21 15:20:45 -03:00
h264cmc_neon.S Merge commit 'e4a94d8b36' 2017-03-21 15:20:45 -03:00
h264dsp_init_aarch64.c lavc/aarch64: Do not use the neon horizontal chroma loop filter for H.264 4:2:2. 2015-01-31 10:05:10 +01:00
h264dsp_neon.S Merge commit 'f896bca03f' 2014-01-15 15:36:37 +01:00
h264idct_neon.S Merge commit '9b2ccafb48' 2017-03-23 12:15:39 +01:00
h264pred_init.c Merge commit 'f56d8d8dd7' 2015-07-21 01:39:30 +02:00
h264pred_neon.S Merge commit 'f56d8d8dd7' 2015-07-21 01:39:30 +02:00
h264qpel_init_aarch64.c arm64: constify src in h264qpel dsp function definitions 2015-06-24 08:41:32 +02:00
h264qpel_neon.S Merge commit 'd5dd8c7bf0' 2014-01-15 15:13:41 +01:00
hpeldsp_init_aarch64.c Merge commit 'c65d67ef50' 2014-01-15 15:20:30 +01:00
hpeldsp_neon.S Merge commit 'c65d67ef50' 2014-01-15 15:20:30 +01:00
idct.h Merge commit '2ec9fa5ec6' 2017-03-21 14:29:52 -03:00
idctdsp_init_aarch64.c lavc/aarch64: add ff_simple_idct{,_add,_put}_neon functions 2017-03-16 12:00:41 +01:00
Makefile lavc/aarch64: add sbrdsp neon implementation 2017-07-03 14:29:22 +02:00
mdct_neon.S Merge commit 'ee2bc5974f' 2014-04-22 23:27:02 +02:00
mpegaudiodsp_init.c Merge commit '72a19f4013' 2017-03-31 14:43:37 -03:00
mpegaudiodsp_neon.S Merge commit '2caa93b813' 2017-03-21 16:04:22 -03:00
neon.S Merge commit 'cdb1665f70' 2016-04-24 12:51:42 +01:00
neontest.c Merge commit 'de2ae3c1fa' 2017-03-21 14:43:53 +01:00
rv40dsp_init_aarch64.c Merge commit 'e4a94d8b36' 2017-03-21 15:20:45 -03:00
sbrdsp_init_aarch64.c lavc/aarch64: add sbrdsp neon implementation 2017-07-03 14:29:22 +02:00
sbrdsp_neon.S lavc/aarch64/sbrdsp_neon: fix build on old binutils 2018-01-26 13:31:46 -03:00
simple_idct_neon.S lavc/aarch64/simple_idct: fix build with Xcode 7.2 2017-06-14 23:20:58 +02:00
synth_filter_init.c avcodec/synth_filter: split off remaining code from dcadec files 2016-01-25 14:57:38 -03:00
synth_filter_neon.S Merge commit '2425d7329f' 2017-04-26 16:28:57 +02:00
vc1dsp_init_aarch64.c Merge commit 'e4a94d8b36' 2017-03-21 15:20:45 -03:00
videodsp.S Merge commit 'd3789eeeed' 2014-04-07 02:51:05 +02:00
videodsp_init.c Merge commit 'd3789eeeed' 2014-04-07 02:51:05 +02:00
vorbisdsp_init.c Merge commit '3956a5e0ea' 2014-04-22 23:51:19 +02:00
vorbisdsp_neon.S Merge commit '3956a5e0ea' 2014-04-22 23:51:19 +02:00
vp9dsp_init.h vp9: re-split the decoder/format/dsp interface header files. 2017-03-28 18:04:26 -04:00
vp9dsp_init_10bpp_aarch64.c aarch64: Add NEON optimizations for 10 and 12 bit vp9 MC 2017-01-24 22:36:05 +02:00
vp9dsp_init_12bpp_aarch64.c aarch64: Add NEON optimizations for 10 and 12 bit vp9 MC 2017-01-24 22:36:05 +02:00
vp9dsp_init_16bpp_aarch64_template.c aarch64/vp9dsp: add missing header includes 2017-03-28 23:02:09 -03:00
vp9dsp_init_aarch64.c aarch64/vp9dsp: add missing header includes 2017-03-28 23:02:09 -03:00
vp9itxfm_16bpp_neon.S aarch64: vp9 16bpp: Fix assembling with Xcode 6.2 and older 2017-06-21 09:08:14 +03:00
vp9itxfm_neon.S aarch64: vp9: Fix assembling with Xcode 6.2 and older 2017-06-21 09:08:13 +03:00
vp9lpf_16bpp_neon.S aarch64: Add NEON optimizations for 10 and 12 bit vp9 loop filter 2017-01-24 22:36:11 +02:00
vp9lpf_neon.S aarch64: vp9lpf: Use dup+rev16+uzp1 instead of dup+lsr+dup+trn1 2017-03-11 13:14:50 +02:00
vp9mc_16bpp_neon.S aarch64: vp9 16bpp: Fix assembling with Xcode 6.2 and older 2017-06-21 09:08:14 +03:00
vp9mc_neon.S aarch64: vp9mc: Load only 12 pixels in the 4 pixel wide horizontal filter 2025-01-04 07:28:47 -05:00