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avoid one transpose (730->680 dezicycles on duron)

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Originally committed as revision 4332 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-06-01 08:43:40 +00:00
parent 85bbfcd4ee
commit e4b36d4434
2 changed files with 22 additions and 11 deletions
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22
libavcodec/h264.c
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@ -333,6 +333,8 @@ typedef struct H264Context{
uint8_t *direct_table;
uint8_t direct_cache[5*8];
uint8_t zigzag_scan[16];
uint8_t field_scan[16];
}H264Context;
static VLC coeff_token_vlc[4];
@ -2721,6 +2723,18 @@ static int decode_init(AVCodecContext *avctx){
s->low_delay= 1;
avctx->pix_fmt= PIX_FMT_YUV420P;
if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
memcpy(h-> field_scan, field_scan, 16*sizeof(uint8_t));
}else{
int i;
for(i=0; i<16; i++){
#define T(x) (x>>2) | ((x<<2) & 0xF)
h->zigzag_scan[i] = T(zigzag_scan[i]);
h-> field_scan[i] = T( field_scan[i]);
}
}
decode_init_vlc(h);
if(avctx->extradata_size > 0 && avctx->extradata &&
@ -4591,10 +4605,10 @@ decode_intra_mb:
// fill_non_zero_count_cache(h);
if(IS_INTERLACED(mb_type)){
scan= field_scan;
scan= h->field_scan;
dc_scan= luma_dc_field_scan;
}else{
scan= zigzag_scan;
scan= h->zigzag_scan;
dc_scan= luma_dc_zigzag_scan;
}
@ -5575,10 +5589,10 @@ decode_intra_mb:
int dqp;
if(IS_INTERLACED(mb_type)){
scan= field_scan;
scan= h->field_scan;
dc_scan= luma_dc_field_scan;
}else{
scan= zigzag_scan;
scan= h->zigzag_scan;
dc_scan= luma_dc_zigzag_scan;
}

11
libavcodec/i386/idct_mmx.c
View File

@ -673,14 +673,11 @@ void ff_h264_idct_add_mmx2(uint8_t *dst, int16_t *block, int stride)
/* mm2=s02+s13 mm3=s02-s13 mm4=d02+d13 mm1=d02-d13 */
IDCT4_1D( %%mm3, %%mm2, %%mm1, %%mm0, %%mm4, %%mm5 )
/* in: 2,4,1,3 out: 2,3,0,1 */
TRANSPOSE4( %%mm2, %%mm4, %%mm1, %%mm3, %%mm0 )
"pxor %%mm7, %%mm7 \n\t"
:: "m"(ff_pw_32));
STORE_DIFF_4P( %%mm2, %%mm4, %%mm7, &dst[0*stride] );
STORE_DIFF_4P( %%mm3, %%mm4, %%mm7, &dst[1*stride] );
STORE_DIFF_4P( %%mm0, %%mm4, %%mm7, &dst[2*stride] );
STORE_DIFF_4P( %%mm1, %%mm4, %%mm7, &dst[3*stride] );
STORE_DIFF_4P( %%mm2, %%mm0, %%mm7, &dst[0*stride] );
STORE_DIFF_4P( %%mm4, %%mm0, %%mm7, &dst[1*stride] );
STORE_DIFF_4P( %%mm1, %%mm0, %%mm7, &dst[2*stride] );
STORE_DIFF_4P( %%mm3, %%mm0, %%mm7, &dst[3*stride] );
}