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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2015-09-09 14:10:41 -0400 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2015-09-10 07:51:16 -0400 |
| commit | fd8b90f5f63de12c1ee1ec1cbe99791c5629c582 (patch) | |
| tree | bdf50fda06657232f3c54265cb7fe3681567dd97 /libavcodec/vp9dsp.c | |
| parent | 4bb9dbe4d7952d82bddb23c45889ab1550897397 (diff) | |
| download | ffmpeg-fd8b90f5f63de12c1ee1ec1cbe99791c5629c582.tar.gz | |
vp9: fix overflow in 8x8 topleft 32x32 idct ssse3 version.
Also disable the mmx/iwht optimization when the bitexact flag is set.
With synthetically coded coefficients (i.e. these that lead to a
residual well outside the [-255,255] range), our optimizations will
overflow. It doesn't make sense to fix the overflows, since they can
only occur on synthetic input, not on real fwht-generated input. Thus,
add a bitexact flag that disables this optimization.
Diffstat (limited to 'libavcodec/vp9dsp.c')
| -rw-r--r-- | libavcodec/vp9dsp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/vp9dsp.c b/libavcodec/vp9dsp.c index 018cb61edf..54e77e267b 100644 --- a/libavcodec/vp9dsp.c +++ b/libavcodec/vp9dsp.c @@ -25,7 +25,7 @@ #include "libavutil/common.h" #include "vp9dsp.h" -av_cold void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp) +av_cold void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp, int bitexact) { if (bpp == 8) { ff_vp9dsp_init_8(dsp); @@ -36,6 +36,6 @@ av_cold void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp) ff_vp9dsp_init_12(dsp); } - if (ARCH_X86) ff_vp9dsp_init_x86(dsp, bpp); + if (ARCH_X86) ff_vp9dsp_init_x86(dsp, bpp, bitexact); if (ARCH_MIPS) ff_vp9dsp_init_mips(dsp, bpp); } |