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VP8: clear DCT blocks in iDCT instead of using clear_blocks. 

~0.3% faster overall.

Originally committed as revision 24448 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Jason Garrett-Glaser 2010-07-23 00:07:16 +00:00
parent b74f70d646
commit c25c776708
4 changed files with 29 additions and 6 deletions
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2
libavcodec/vp8.c
View File

@ -835,8 +835,6 @@ static void decode_mb_coeffs(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb
int nnz_pred, nnz, nnz_total = 0;
int segment = s->segment;
s->dsp.clear_blocks((DCTELEM *)s->block);
if (mb->mode != MODE_I4x4 && mb->mode != VP8_MVMODE_SPLIT) {
AV_ZERO128(dc);
AV_ZERO128(dc+8);

5
libavcodec/vp8dsp.c
View File

@ -69,6 +69,10 @@ static void vp8_idct_add_c(uint8_t *dst, DCTELEM block[16], int stride)
t1 = block[0*4+i] - block[2*4+i];
t2 = MUL_35468(block[1*4+i]) - MUL_20091(block[3*4+i]);
t3 = MUL_20091(block[1*4+i]) + MUL_35468(block[3*4+i]);
block[0*4+i] = 0;
block[1*4+i] = 0;
block[2*4+i] = 0;
block[3*4+i] = 0;
tmp[i*4+0] = t0 + t3;
tmp[i*4+1] = t1 + t2;
@ -94,6 +98,7 @@ static void vp8_idct_dc_add_c(uint8_t *dst, DCTELEM block[16], int stride)
{
int i, dc = (block[0] + 4) >> 3;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP + dc;
block[0] = 0;
for (i = 0; i < 4; i++) {
dst[0] = cm[dst[0]];

2
libavcodec/x86/vp8dsp-init.c
View File

@ -222,6 +222,7 @@ extern void ff_vp8_idct_dc_add_mmx(uint8_t *dst, DCTELEM block[16], int stride);
extern void ff_vp8_idct_dc_add_sse4(uint8_t *dst, DCTELEM block[16], int stride);
extern void ff_vp8_luma_dc_wht_mmx(DCTELEM block[4][4][16], DCTELEM dc[16]);
extern void ff_vp8_idct_add_mmx(uint8_t *dst, DCTELEM block[16], int stride);
extern void ff_vp8_idct_add_sse(uint8_t *dst, DCTELEM block[16], int stride);
#define DECLARE_LOOP_FILTER(NAME)\
extern void ff_vp8_v_loop_filter_simple_ ## NAME(uint8_t *dst, int stride, int flim);\
@ -328,6 +329,7 @@ av_cold void ff_vp8dsp_init_x86(VP8DSPContext* c)
}
if (mm_flags & FF_MM_SSE) {
c->vp8_idct_add = ff_vp8_idct_add_sse;
c->put_vp8_epel_pixels_tab[0][0][0] =
c->put_vp8_bilinear_pixels_tab[0][0][0] = ff_put_vp8_pixels16_sse;
}

26
libavcodec/x86/vp8dsp.asm
View File

@ -913,6 +913,7 @@ cglobal vp8_idct_dc_add_mmx, 3, 3
paddw mm0, [pw_4]
pxor mm1, mm1
psraw mm0, 3
movd [r1], mm1
psubw mm1, mm0
packuswb mm0, mm0
packuswb mm1, mm1
@ -944,11 +945,12 @@ cglobal vp8_idct_dc_add_mmx, 3, 3
cglobal vp8_idct_dc_add_sse4, 3, 3, 6
; load data
movd xmm0, [r1]
lea r1, [r0+r2*2]
pxor xmm1, xmm1
; calculate DC
paddw xmm0, [pw_4]
movd [r1], xmm1
lea r1, [r0+r2*2]
movd xmm2, [r0]
movd xmm3, [r0+r2]
movd xmm4, [r1]
@ -1005,14 +1007,26 @@ cglobal vp8_idct_dc_add_sse4, 3, 3, 6
%endmacro
INIT_MMX
cglobal vp8_idct_add_mmx, 3, 3
%macro VP8_IDCT_ADD 1
cglobal vp8_idct_add_%1, 3, 3
; load block data
movq m0, [r1]
movq m1, [r1+8]
movq m0, [r1+ 0]
movq m1, [r1+ 8]
movq m2, [r1+16]
movq m3, [r1+24]
movq m6, [pw_20091]
movq m7, [pw_17734]
%ifidn %1, sse
xorps xmm0, xmm0
movaps [r1+ 0], xmm0
movaps [r1+16], xmm0
%else
pxor m4, m4
movq [r1+ 0], m4
movq [r1+ 8], m4
movq [r1+16], m4
movq [r1+24], m4
%endif
; actual IDCT
VP8_IDCT_TRANSFORM4x4_1D 0, 1, 2, 3, 4, 5
@ -1028,6 +1042,10 @@ cglobal vp8_idct_add_mmx, 3, 3
STORE_DIFFx2 m2, m3, m6, m7, m4, 3, r1, r2
RET
%endmacro
VP8_IDCT_ADD mmx
VP8_IDCT_ADD sse
;-----------------------------------------------------------------------------
; void vp8_luma_dc_wht_mmxext(DCTELEM block[4][4][16], DCTELEM dc[16])