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vp3: 10l Fix DC-only IDCT for C and ARM too 

Originally committed as revision 23359 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-05-28 07:22:04 +00:00
parent 179655b6c6
commit c0fda017d1
2 changed files with 3 additions and 7 deletions
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6
libavcodec/arm/vp3dsp_neon.S
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@ -377,12 +377,10 @@ endfunc
function ff_vp3_idct_dc_add_neon, export=1 function ff_vp3_idct_dc_add_neon, export=1
ldrsh r2, [r2] ldrsh r2, [r2]
movw r3, #46341
mul r2, r3, r2
smulwt r2, r3, r2
mov r3, r0 mov r3, r0
add r2, r2, #15
vdup.16 q15, r2 vdup.16 q15, r2
vrshr.s16 q15, q15, #4 vshr.s16 q15, q15, #5
vld1.8 {d0}, [r0,:64], r1 vld1.8 {d0}, [r0,:64], r1
vld1.8 {d1}, [r0,:64], r1 vld1.8 {d1}, [r0,:64], r1

4
libavcodec/vp3dsp.c
View File

@ -225,9 +225,7 @@ void ff_vp3_idct_add_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*
void ff_vp3_idct_dc_add_c(uint8_t *dest/*align 8*/, int line_size, const DCTELEM *block/*align 16*/){ void ff_vp3_idct_dc_add_c(uint8_t *dest/*align 8*/, int line_size, const DCTELEM *block/*align 16*/){
const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
int i, dc = block[0]; int i, dc = (block[0] + 15) >> 5;
dc = (46341*dc)>>16;
dc = (46341*dc + (8<<16))>>20;
for(i = 0; i < 8; i++){ for(i = 0; i < 8; i++){
dest[0] = cm[dest[0]+dc]; dest[0] = cm[dest[0]+dc];