prefetch pixels for future motion compensation. 2-5% faster h264.

Originally committed as revision 5203 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2006-03-23 20:16:36 +00:00
parent 7e815047e5
commit 513fbd8e5a
4 changed files with 42 additions and 0 deletions

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@ -3773,6 +3773,8 @@ static void ff_jref_idct1_add(uint8_t *dest, int line_size, DCTELEM *block)
dest[0] = cm[dest[0] + ((block[0] + 4)>>3)];
}
static void just_return() { return; }
/* init static data */
void dsputil_static_init(void)
{
@ -4054,6 +4056,8 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->inner_add_yblock = ff_snow_inner_add_yblock;
#endif
c->prefetch= just_return;
#ifdef HAVE_MMX
dsputil_init_mmx(c, avctx);
#endif

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@ -343,6 +343,8 @@ typedef struct DSPContext {
void (*vertical_compose97i)(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
void (*horizontal_compose97i)(DWTELEM *b, int width);
void (*inner_add_yblock)(uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
void (*prefetch)(void *mem, int stride, int h);
} DSPContext;
void dsputil_static_init(void);

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@ -2752,6 +2752,22 @@ static inline void mc_part(H264Context *h, int n, int square, int chroma_height,
x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
}
static inline void prefetch_motion(H264Context *h, int list){
/* fetch pixels for estimated mv 4 macroblocks ahead
* optimized for 64byte cache lines */
MpegEncContext * const s = &h->s;
const int refn = h->ref_cache[list][scan8[0]];
if(refn >= 0){
const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
uint8_t **src= h->ref_list[list][refn].data;
int off= mx + (my + (s->mb_x&3)*4)*s->linesize + 64;
s->dsp.prefetch(src[0]+off, s->linesize, 4);
off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
}
}
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
@ -2762,6 +2778,8 @@ static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t
assert(IS_INTER(mb_type));
prefetch_motion(h, 0);
if(IS_16X16(mb_type)){
mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
@ -2833,6 +2851,8 @@ static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t
}
}
}
prefetch_motion(h, 1);
}
static void decode_init_vlc(H264Context *h){

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@ -2489,6 +2489,18 @@ static void add_8x8basis_mmx(int16_t rem[64], int16_t basis[64], int scale){
}
}
#define PREFETCH(name, op) \
void name(void *mem, int stride, int h){\
const uint8_t *p= mem;\
do{\
asm volatile(#op" %0" :: "m"(*p));\
p+= stride;\
}while(--h);\
}
PREFETCH(prefetch_mmx2, prefetcht0)
PREFETCH(prefetch_3dnow, prefetch)
#undef PREFETCH
#include "h264dsp_mmx.c"
/* external functions, from idct_mmx.c */
@ -2749,6 +2761,8 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
c->h264_idct8_add= ff_h264_idct8_add_mmx;
if (mm_flags & MM_MMXEXT) {
c->prefetch = prefetch_mmx2;
c->put_pixels_tab[0][1] = put_pixels16_x2_mmx2;
c->put_pixels_tab[0][2] = put_pixels16_y2_mmx2;
@ -2879,6 +2893,8 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
c->sub_hfyu_median_prediction= sub_hfyu_median_prediction_mmx2;
#endif //CONFIG_ENCODERS
} else if (mm_flags & MM_3DNOW) {
c->prefetch = prefetch_3dnow;
c->put_pixels_tab[0][1] = put_pixels16_x2_3dnow;
c->put_pixels_tab[0][2] = put_pixels16_y2_3dnow;