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Minorly modify model_rd_for_sb_y function

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Added a skip_dc check. If skip_dc = 1, we could eliminate calling
of vp9_model_rd_from_var_lapndz(). This gave slight PSNR & SSIM
gain(<0.1%), and no speed change.

Change-Id: If5ca733366148c86b98e196a00cc890f50e9a3e5
This commit is contained in:
Yunqing Wang 2015-03-11 11:31:47 -07:00
parent 340260585c
commit 5d677c97eb
1 changed files with 22 additions and 10 deletions
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32
vp9/encoder/vp9_pickmode.c
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@ -221,6 +221,8 @@ static void model_rd_for_sb_y(VP9_COMP *cpi, BLOCK_SIZE bsize,
const uint32_t ac_quant = pd->dequant[1]; const uint32_t ac_quant = pd->dequant[1];
unsigned int var = cpi->fn_ptr[bsize].vf(p->src.buf, p->src.stride, unsigned int var = cpi->fn_ptr[bsize].vf(p->src.buf, p->src.stride,
pd->dst.buf, pd->dst.stride, &sse); pd->dst.buf, pd->dst.stride, &sse);
int skip_dc = 0;
*var_y = var; *var_y = var;
*sse_y = sse; *sse_y = sse;
@ -262,6 +264,9 @@ static void model_rd_for_sb_y(VP9_COMP *cpi, BLOCK_SIZE bsize,
// Check if dc coefficient can be quantized to zero. // Check if dc coefficient can be quantized to zero.
if (sse_tx - var_tx < dc_thr || sse == var) if (sse_tx - var_tx < dc_thr || sse == var)
x->skip_txfm[0] = 1; x->skip_txfm[0] = 1;
} else {
if (sse_tx - var_tx < dc_thr || sse == var)
skip_dc = 1;
} }
} }
@ -271,21 +276,28 @@ static void model_rd_for_sb_y(VP9_COMP *cpi, BLOCK_SIZE bsize,
return; return;
} }
if (!skip_dc) {
#if CONFIG_VP9_HIGHBITDEPTH #if CONFIG_VP9_HIGHBITDEPTH
if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
vp9_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bsize], vp9_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bsize],
dc_quant >> (xd->bd - 5), &rate, &dist); dc_quant >> (xd->bd - 5), &rate, &dist);
} else { } else {
vp9_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bsize],
dc_quant >> 3, &rate, &dist);
}
#else
vp9_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bsize], vp9_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bsize],
dc_quant >> 3, &rate, &dist); dc_quant >> 3, &rate, &dist);
}
#else
vp9_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bsize],
dc_quant >> 3, &rate, &dist);
#endif // CONFIG_VP9_HIGHBITDEPTH #endif // CONFIG_VP9_HIGHBITDEPTH
}
*out_rate_sum = rate >> 1; if (!skip_dc) {
*out_dist_sum = dist << 3; *out_rate_sum = rate >> 1;
*out_dist_sum = dist << 3;
} else {
*out_rate_sum = 0;
*out_dist_sum = (sse - var) << 4;
}
#if CONFIG_VP9_HIGHBITDEPTH #if CONFIG_VP9_HIGHBITDEPTH
if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {