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| author | Peter Ross <pross@xvid.org> | 2014-02-16 15:32:59 +1100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-02-17 03:12:34 +0100 |
| commit | a707d18a48898342046014f41a030b82bf1be0b3 (patch) | |
| tree | e97c0746f8bb0bbb7ba32ef8a28b99df8a727d48 | |
| parent | c97c7c2adf408fd187b39ca19dcad35eddae1394 (diff) | |
| download | ffmpeg-a707d18a48898342046014f41a030b82bf1be0b3.tar.gz | |
avcodec/vp8dsp: zeroise input coefficient array after use in vp7 idct functions
Signed-off-by: Peter Ross <pross@xvid.org>
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/vp8dsp.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/vp8dsp.c b/libavcodec/vp8dsp.c index 6c8aea7492..bb6b1f5ec5 100644 --- a/libavcodec/vp8dsp.c +++ b/libavcodec/vp8dsp.c @@ -50,6 +50,10 @@ static void vp7_luma_dc_wht_c(int16_t block[4][4][16], int16_t dc[16]) b1 = (tmp[i + 0] - tmp[i + 8]) * 23170; c1 = tmp[i + 4] * 12540 - tmp[i + 12] * 30274; d1 = tmp[i + 4] * 30274 + tmp[i + 12] * 12540; + dc[i*4+0] = 0; + dc[i*4+1] = 0; + dc[i*4+2] = 0; + dc[i*4+3] = 0; block[0][i][0] = (a1 + d1 + 0x20000) >> 18; block[3][i][0] = (a1 - d1 + 0x20000) >> 18; block[1][i][0] = (b1 + c1 + 0x20000) >> 18; @@ -80,6 +84,10 @@ static void vp7_idct_add_c(uint8_t *dst, int16_t block[16], ptrdiff_t stride) b1 = (block[i*4+0] - block[i*4+2]) * 23170; c1 = block[i*4+1] * 12540 - block[i*4+3] * 30274; d1 = block[i*4+1] * 30274 + block[i*4+3] * 12540; + block[i*4+0] = 0; + block[i*4+1] = 0; + block[i*4+2] = 0; + block[i*4+3] = 0; tmp[i*4+0] = (a1 + d1) >> 14; tmp[i*4+3] = (a1 - d1) >> 14; tmp[i*4+1] = (b1 + c1) >> 14; |