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Tune tokenization/detokenization flow for speed-up

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This commit optimizes the tokenization and detokenization operational
flow for speed-up. It makes the coding process about 0.3% faster at
speed 0.

Change-Id: I28008df7482874e4b5f237f2d418ff82a249dd56
This commit is contained in:
Jingning Han 2013-07-29 16:03:02 -07:00
parent b5323ed89a
commit 455f2de20b
2 changed files with 16 additions and 19 deletions
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12
vp9/decoder/vp9_detokenize.c
View File

@ -118,22 +118,22 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
}
case TX_8X8: {
scan = get_scan_8x8(get_tx_type_8x8(type, xd));
above_ec = (A[0] + A[1]) != 0;
left_ec = (L[0] + L[1]) != 0;
above_ec = !!*(uint16_t *)A;
left_ec = !!*(uint16_t *)L;
band_translate = vp9_coefband_trans_8x8plus;
break;
}
case TX_16X16: {
scan = get_scan_16x16(get_tx_type_16x16(type, xd));
above_ec = (A[0] + A[1] + A[2] + A[3]) != 0;
left_ec = (L[0] + L[1] + L[2] + L[3]) != 0;
above_ec = !!*(uint32_t *)A;
left_ec = !!*(uint32_t *)L;
band_translate = vp9_coefband_trans_8x8plus;
break;
}
case TX_32X32:
scan = vp9_default_scan_32x32;
above_ec = (A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7]) != 0;
left_ec = (L[0] + L[1] + L[2] + L[3] + L[4] + L[5] + L[6] + L[7]) != 0;
above_ec = !!*(uint64_t *)A;
left_ec = !!*(uint64_t *)L;
band_translate = vp9_coefband_trans_8x8plus;
break;
}

23
vp9/encoder/vp9_tokenize.c
View File

@ -136,9 +136,7 @@ static void tokenize_b(int plane, int block, BLOCK_SIZE_TYPE bsize,
const int eob = xd->plane[plane].eobs[block];
const PLANE_TYPE type = xd->plane[plane].plane_type;
const int16_t *qcoeff_ptr = BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16);
const BLOCK_SIZE_TYPE sb_type = (mbmi->sb_type < BLOCK_SIZE_SB8X8) ?
BLOCK_SIZE_SB8X8 : mbmi->sb_type;
const int bwl = b_width_log2(sb_type);
const int bwl = b_width_log2(bsize);
const int off = block >> (2 * tx_size);
const int mod = bwl - tx_size - xd->plane[plane].subsampling_x;
const int aoff = (off & ((1 << mod) - 1)) << tx_size;
@ -168,22 +166,22 @@ static void tokenize_b(int plane, int block, BLOCK_SIZE_TYPE bsize,
band_translate = vp9_coefband_trans_4x4;
break;
case TX_8X8:
above_ec = (A[0] + A[1]) != 0;
left_ec = (L[0] + L[1]) != 0;
above_ec = !!*(uint16_t *)A;
left_ec = !!*(uint16_t *)L;
seg_eob = 64;
scan = get_scan_8x8(get_tx_type_8x8(type, xd));
band_translate = vp9_coefband_trans_8x8plus;
break;
case TX_16X16:
above_ec = (A[0] + A[1] + A[2] + A[3]) != 0;
left_ec = (L[0] + L[1] + L[2] + L[3]) != 0;
above_ec = !!*(uint32_t *)A;
left_ec = !!*(uint32_t *)L;
seg_eob = 256;
scan = get_scan_16x16(get_tx_type_16x16(type, xd));
band_translate = vp9_coefband_trans_8x8plus;
break;
case TX_32X32:
above_ec = (A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7]) != 0;
left_ec = (L[0] + L[1] + L[2] + L[3] + L[4] + L[5] + L[6] + L[7]) != 0;
above_ec = !!*(uint64_t *)A;
left_ec = !!*(uint64_t *)L;
seg_eob = 1024;
scan = vp9_default_scan_32x32;
band_translate = vp9_coefband_trans_8x8plus;
@ -225,7 +223,7 @@ static void tokenize_b(int plane, int block, BLOCK_SIZE_TYPE bsize,
if (!t->skip_eob_node)
++cpi->common.counts.eob_branch[tx_size][type][ref][band][pt];
}
token_cache[scan[c]] = vp9_pt_energy_class[token];
token_cache[rc] = vp9_pt_energy_class[token];
++t;
} while (c < eob && ++c < seg_eob);
@ -233,9 +231,8 @@ static void tokenize_b(int plane, int block, BLOCK_SIZE_TYPE bsize,
if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
set_contexts_on_border(xd, bsize, plane, tx_size, c, aoff, loff, A, L);
} else {
for (pt = 0; pt < (1 << tx_size); pt++) {
A[pt] = L[pt] = c > 0;
}
vpx_memset(A, c > 0, sizeof(ENTROPY_CONTEXT) * (1 << tx_size));
vpx_memset(L, c > 0, sizeof(ENTROPY_CONTEXT) * (1 << tx_size));
}
}