generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Rework forward txfm/quantization skip system in RTC coding mode

Browse Source 
This commit allows more aggressive decision to skip forward
transform and quantization for luma component in RTC coding mode.
The chroma components remains going through the normal coding
routine, since they are not included in the non-RD mode search
process.

It reduces the runtime cost by 2% - 10%. In speed -6,
vidyo1 1000 kbps
16576 b/f, 40.281 dB, 8402 ms -> 16576 b/f, 40.323 dB, 7764 ms

nik720p 1000 kbps
33337 b/f, 38.622 dB, 7473 ms -> 33299 b/f, 38.660 dB, 7314 ms

dark720p 1000 kbps
33330 b/f, 39.785 dB, 13505 ms -> 33325 b/f, 39.714 dB, 13105 ms

The compression performance of speed -6 is improved by 0.44% in
PSNR and 1.31% in SSIM.

Change-Id: Iae9e3738de6255babea734e5897f29118bebc6d7
This commit is contained in:
Jingning Han 2014-11-21 12:18:53 -08:00
parent ec8c25ca2a
commit 7428cebe4f
2 changed files with 30 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
vp9/encoder/vp9_encodemb.c
View File

@ -657,27 +657,34 @@ static void encode_block(int plane, int block, BLOCK_SIZE plane_bsize,
vp9_xform_quant(x, plane, block, plane_bsize, tx_size);
#else
if (!x->skip_recode) {
if (max_txsize_lookup[plane_bsize] == tx_size) {
if (x->skip_txfm[(plane << 2) + (block >> (tx_size << 1))] == 0) {
// full forward transform and quantization
if (x->quant_fp)
vp9_xform_quant_fp(x, plane, block, plane_bsize, tx_size);
else
vp9_xform_quant(x, plane, block, plane_bsize, tx_size);
} else if (x->skip_txfm[(plane << 2) + (block >> (tx_size << 1))] == 2) {
// fast path forward transform and quantization
vp9_xform_quant_dc(x, plane, block, plane_bsize, tx_size);
} else {
if (x->quant_fp) {
// Encoding process for rtc mode
if (x->skip_txfm[0] == 1 && plane == 0) {
// skip forward transform
p->eobs[block] = 0;
*a = *l = 0;
return;
} else {
vp9_xform_quant_fp(x, plane, block, plane_bsize, tx_size);
}
} else {
if (x->quant_fp)
vp9_xform_quant_fp(x, plane, block, plane_bsize, tx_size);
else
if (max_txsize_lookup[plane_bsize] == tx_size) {
int txfm_blk_index = (plane << 2) + (block >> (tx_size << 1));
if (x->skip_txfm[txfm_blk_index] == 0) {
// full forward transform and quantization
vp9_xform_quant(x, plane, block, plane_bsize, tx_size);
} else if (x->skip_txfm[txfm_blk_index]== 2) {
// fast path forward transform and quantization
vp9_xform_quant_dc(x, plane, block, plane_bsize, tx_size);
} else {
// skip forward transform
p->eobs[block] = 0;
*a = *l = 0;
return;
}
} else {
vp9_xform_quant(x, plane, block, plane_bsize, tx_size);
}
}
}
#endif

24
vp9/encoder/vp9_pickmode.c
View File

@ -265,28 +265,22 @@ static void model_rd_for_sb_y(VP9_COMP *cpi, BLOCK_SIZE bsize,
#if CONFIG_VP9_HIGHBITDEPTH
if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
vp9_model_rd_from_var_lapndz(var,
1 << num_pels_log2_lookup[bsize],
ac_quant >> (xd->bd - 5),
&rate,
&dist);
vp9_model_rd_from_var_lapndz(var, 1 << num_pels_log2_lookup[bsize],
ac_quant >> (xd->bd - 5), &rate, &dist);
} else {
vp9_model_rd_from_var_lapndz(var,
1 << num_pels_log2_lookup[bsize],
ac_quant >> 3,
&rate,
&dist);
vp9_model_rd_from_var_lapndz(var, 1 << num_pels_log2_lookup[bsize],
ac_quant >> 3, &rate, &dist);
}
#else
vp9_model_rd_from_var_lapndz(var,
1 << num_pels_log2_lookup[bsize],
ac_quant >> 3,
&rate,
&dist);
vp9_model_rd_from_var_lapndz(var, 1 << num_pels_log2_lookup[bsize],
ac_quant >> 3, &rate, &dist);
#endif // CONFIG_VP9_HIGHBITDEPTH
*out_rate_sum += rate;
*out_dist_sum += dist << 4;
if (*out_rate_sum == 0)
x->skip_txfm[0] = 1;
}
static int get_pred_buffer(PRED_BUFFER *p, int len) {