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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2012-04-13 14:37:47 -0700 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2012-04-14 16:29:10 -0700 |
| commit | 4860625236475da20d0da954017e8c7fe412dea2 (patch) | |
| tree | 1ea7bbaa942b251c5faac3b59d8fc0e70c81f9ae | |
| parent | 7bf9e3391fa21d90ff283fc03a12287fe73db9e8 (diff) | |
| download | ffmpeg-4860625236475da20d0da954017e8c7fe412dea2.tar.gz | |
swscale: fix off-by-one in second coefficient in bilinear filters.
If coefficient A is 12-bits xixed-point number "X", then the other
coefficient is (1 << 12) - X, not (1 << 12) - X - 1.
| -rw-r--r-- | libswscale/output.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/libswscale/output.c b/libswscale/output.c index 5bc25fc35a..c0f9b367d3 100644 --- a/libswscale/output.c +++ b/libswscale/output.c @@ -353,7 +353,7 @@ yuv2mono_2_c_template(SwsContext *c, const int16_t *buf[2], { const int16_t *buf0 = buf[0], *buf1 = buf[1]; const uint8_t * const d128 = dither_8x8_220[y & 7]; - int yalpha1 = 4095 - yalpha; + int yalpha1 = 4096 - yalpha; int i; for (i = 0; i < dstW; i += 8) { @@ -505,8 +505,8 @@ yuv2422_2_c_template(SwsContext *c, const int16_t *buf[2], const int16_t *buf0 = buf[0], *buf1 = buf[1], *ubuf0 = ubuf[0], *ubuf1 = ubuf[1], *vbuf0 = vbuf[0], *vbuf1 = vbuf[1]; - int yalpha1 = 4095 - yalpha; - int uvalpha1 = 4095 - uvalpha; + int yalpha1 = 4096 - yalpha; + int uvalpha1 = 4096 - uvalpha; int i; for (i = 0; i < ((dstW + 1) >> 1); i++) { @@ -648,8 +648,8 @@ yuv2rgb48_2_c_template(SwsContext *c, const int32_t *buf[2], const int32_t *buf0 = buf[0], *buf1 = buf[1], *ubuf0 = ubuf[0], *ubuf1 = ubuf[1], *vbuf0 = vbuf[0], *vbuf1 = vbuf[1]; - int yalpha1 = 4095 - yalpha; - int uvalpha1 = 4095 - uvalpha; + int yalpha1 = 4096 - yalpha; + int uvalpha1 = 4096 - uvalpha; int i; for (i = 0; i < ((dstW + 1) >> 1); i++) { @@ -995,8 +995,8 @@ yuv2rgb_2_c_template(SwsContext *c, const int16_t *buf[2], *vbuf0 = vbuf[0], *vbuf1 = vbuf[1], *abuf0 = hasAlpha ? abuf[0] : NULL, *abuf1 = hasAlpha ? abuf[1] : NULL; - int yalpha1 = 4095 - yalpha; - int uvalpha1 = 4095 - uvalpha; + int yalpha1 = 4096 - yalpha; + int uvalpha1 = 4096 - uvalpha; int i; for (i = 0; i < ((dstW + 1) >> 1); i++) { |