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swscale/output: fix alpha scale in the new functions

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-14 16:56:42 +02:00
parent a4b5e45e2b
commit 41ebb64511
1 changed files with 9 additions and 9 deletions
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18
libswscale/output.c
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@ -1391,9 +1391,9 @@ yuv2rgb_full_2_c_template(SwsContext *c, const int16_t *buf[2],
int A;
if (hasAlpha) {
A = (abuf0[i] * yalpha1 + abuf1[i] * yalpha)<<3;
if (A & 0xC0000000)
A = av_clip_uintp2(A, 30);
A = (abuf0[i] * yalpha1 + abuf1[i] * yalpha + (1<<18)) >> 19;
if (A & 0x100)
A = av_clip_uint8(A);
}
yuv2rgb_write_full(c, dest, i, Y, A, U, V, y, target, hasAlpha, err);
@ -1428,9 +1428,9 @@ yuv2rgb_full_1_c_template(SwsContext *c, const int16_t *buf0,
int A;
if (hasAlpha) {
A = abuf0[i]<<15;
if (A & 0xC0000000)
A = av_clip_uintp2(A, 30);
A = (abuf0[i] + 64) >> 7;
if (A & 0x100)
A = av_clip_uint8(A);
}
yuv2rgb_write_full(c, dest, i, Y, A, U, V, y, target, hasAlpha, err);
@ -1445,9 +1445,9 @@ yuv2rgb_full_1_c_template(SwsContext *c, const int16_t *buf0,
int A;
if (hasAlpha) {
A = abuf0[i]<<15;
if (A & 0xC0000000)
A = av_clip_uintp2(A, 30);
A = (abuf0[i] + 64) >> 7;
if (A & 0x100)
A = av_clip_uint8(A);
}
yuv2rgb_write_full(c, dest, i, Y, A, U, V, y, target, hasAlpha, err);