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Code Issues Releases Activity

use h264 MC code if possible

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50% faster predict_plane() if mmx2/3dnow is available
0.1% bitrate increase

Originally committed as revision 3455 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-09-12 21:32:36 +00:00
parent 0fd847a168
commit ec69758781
1 changed files with 7 additions and 25 deletions
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32
libavcodec/snow.c
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@ -1988,29 +1988,6 @@ START_TIMER
STOP_TIMER("mc_block")
}
#define mcb(dx,dy,b_w)\
static void mc_block ## dx ## dy(uint8_t *dst, uint8_t *src, int stride){\
uint8_t tmp[stride*(b_w+5)];\
mc_block(dst, src-2-2*stride, tmp, stride, b_w, b_w, dx, dy);\
}
mcb( 0, 0,16)
mcb( 4, 0,16)
mcb( 8, 0,16)
mcb(12, 0,16)
mcb( 0, 4,16)
mcb( 4, 4,16)
mcb( 8, 4,16)
mcb(12, 4,16)
mcb( 0, 8,16)
mcb( 4, 8,16)
mcb( 8, 8,16)
mcb(12, 8,16)
mcb( 0,12,16)
mcb( 4,12,16)
mcb( 8,12,16)
mcb(12,12,16)
#define mca(dx,dy,b_w)\
static void mc_block_hpel ## dx ## dy(uint8_t *dst, uint8_t *src, int stride, int h){\
uint8_t tmp[stride*(b_w+5)];\
@ -2036,6 +2013,8 @@ static void pred_block(SnowContext *s, uint8_t *dst, uint8_t *src, uint8_t *tmp,
const int scale= plane_index ? s->mv_scale : 2*s->mv_scale;
int mx= block->mx*scale;
int my= block->my*scale;
const int dx= mx&15;
const int dy= my&15;
sx += (mx>>4) - 2;
sy += (my>>4) - 2;
src += sx + sy*stride;
@ -2044,7 +2023,10 @@ static void pred_block(SnowContext *s, uint8_t *dst, uint8_t *src, uint8_t *tmp,
ff_emulated_edge_mc(tmp + MB_SIZE, src, stride, b_w+5, b_h+5, sx, sy, w, h);
src= tmp + MB_SIZE;
}
mc_block(dst, src, tmp, stride, b_w, b_h, mx&15, my&15);
if((dx&3) || (dy&3) || b_w!=b_h || (b_w!=4 && b_w!=8 && b_w!=16))
mc_block(dst, src, tmp, stride, b_w, b_h, dx, dy);
else
s->dsp.put_h264_qpel_pixels_tab[2-(b_w>>3)][dy+(dx>>2)](dst,src + 2 + 2*stride,stride);
}
}
@ -2464,7 +2446,7 @@ static int common_init(AVCodecContext *avctx){
#define mcf(dx,dy)\
s->dsp.put_qpel_pixels_tab [0][dy+dx/4]=\
s->dsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\
mc_block ## dx ## dy;
s->dsp.put_h264_qpel_pixels_tab[0][dy+dx/4];
mcf( 0, 0)
mcf( 4, 0)