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Code Issues Releases Activity

Get rid of large stack array in rd8x8_c()

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Originally committed as revision 19671 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-08-19 21:59:44 +00:00
parent 0314dead4e
commit 90d43b52e1
1 changed files with 9 additions and 9 deletions
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18
libavcodec/dsputil.c
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@ -3831,9 +3831,11 @@ static int rd8x8_c(/*MpegEncContext*/ void *c, uint8_t *src1, uint8_t *src2, int
MpegEncContext * const s= (MpegEncContext *)c;
const uint8_t *scantable= s->intra_scantable.permutated;
DECLARE_ALIGNED_8 (uint64_t, aligned_temp[sizeof(DCTELEM)*64/8]);
DECLARE_ALIGNED_8 (uint64_t, aligned_bak[stride]);
DECLARE_ALIGNED_8 (uint64_t, aligned_src1[8]);
DECLARE_ALIGNED_8 (uint64_t, aligned_src2[8]);
DCTELEM * const temp= (DCTELEM*)aligned_temp;
uint8_t * const bak= (uint8_t*)aligned_bak;
uint8_t * const lsrc1 = (uint8_t*)aligned_src1;
uint8_t * const lsrc2 = (uint8_t*)aligned_src2;
int i, last, run, bits, level, distortion, start_i;
const int esc_length= s->ac_esc_length;
uint8_t * length;
@ -3841,12 +3843,10 @@ static int rd8x8_c(/*MpegEncContext*/ void *c, uint8_t *src1, uint8_t *src2, int
assert(h==8);
for(i=0; i<8; i++){
((uint32_t*)(bak + i*stride))[0]= ((uint32_t*)(src2 + i*stride))[0];
((uint32_t*)(bak + i*stride))[1]= ((uint32_t*)(src2 + i*stride))[1];
}
copy_block8(lsrc1, src1, 8, stride, 8);
copy_block8(lsrc2, src2, 8, stride, 8);
s->dsp.diff_pixels(temp, src1, src2, stride);
s->dsp.diff_pixels(temp, lsrc1, lsrc2, 8);
s->block_last_index[0/*FIXME*/]= last= s->fast_dct_quantize(s, temp, 0/*FIXME*/, s->qscale, &i);
@ -3899,9 +3899,9 @@ static int rd8x8_c(/*MpegEncContext*/ void *c, uint8_t *src1, uint8_t *src2, int
s->dct_unquantize_inter(s, temp, 0, s->qscale);
}
s->dsp.idct_add(bak, stride, temp);
s->dsp.idct_add(lsrc2, 8, temp);
distortion= s->dsp.sse[1](NULL, bak, src1, stride, 8);
distortion= s->dsp.sse[1](NULL, lsrc2, lsrc1, 8, 8);
return distortion + ((bits*s->qscale*s->qscale*109 + 64)>>7);
}