ref: adaec4d0fbb4b9b0cbcd06b82d3f24cc2ce4b332
parent: aebb361bb7c36be1317337c37ea7002e9f90bce6
author: Dmitry Kovalev <dkovalev@google.com>
date: Fri Sep 5 12:58:24 EDT 2014
Speeding up decode_coeffs(). 1080p decoding speedup -- 1.25%, 4K decoding speedup -- 2.5%. Change-Id: I5f02f521cbf7758d4d1886a93bc5b074abdff03d
--- a/vp9/decoder/vp9_detokenize.c
+++ b/vp9/decoder/vp9_detokenize.c
@@ -13,6 +13,7 @@
#include "vp9/common/vp9_blockd.h"
#include "vp9/common/vp9_common.h"
+#include "vp9/common/vp9_entropy.h"
#include "vp9/decoder/vp9_detokenize.h"
@@ -31,29 +32,31 @@
#define INCREMENT_COUNT(token) \
do { \if (!cm->frame_parallel_decoding_mode) \
- ++coef_counts[band][ctx][token]; \
+ ++coef_counts[band][ctx][token]; \
} while (0)
-#define WRITE_COEF_CONTINUE(val, token) \
- { \- v = (val * dqv) >> dq_shift; \
- dqcoeff[scan[c]] = vp9_read_bit(r) ? -v : v; \
- token_cache[scan[c]] = vp9_pt_energy_class[token]; \
- ++c; \
- ctx = get_coef_context(nb, token_cache, c); \
- dqv = dq[1]; \
- continue; \
- }
+static INLINE int read_coeff(const vp9_prob *probs, int n, vp9_reader *r) {+ int i, val = 0;
+ for (i = 0; i < n; ++i)
+ val = (val << 1) | vp9_read(r, probs[i]);
+ return val;
+}
-#define ADJUST_COEF(prob, bits_count) \
- do { \- val += (vp9_read(r, prob) << bits_count); \
- } while (0)
+static const vp9_tree_index coeff_subtree_high[TREE_SIZE(ENTROPY_TOKENS)] = {+ 2, 6, /* 0 = LOW_VAL */
+ -TWO_TOKEN, 4, /* 1 = TWO */
+ -THREE_TOKEN, -FOUR_TOKEN, /* 2 = THREE */
+ 8, 10, /* 3 = HIGH_LOW */
+ -CATEGORY1_TOKEN, -CATEGORY2_TOKEN, /* 4 = CAT_ONE */
+ 12, 14, /* 5 = CAT_THREEFOUR */
+ -CATEGORY3_TOKEN, -CATEGORY4_TOKEN, /* 6 = CAT_THREE */
+ -CATEGORY5_TOKEN, -CATEGORY6_TOKEN /* 7 = CAT_FIVE */
+};
static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd, PLANE_TYPE type,
- tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq,
- int ctx, const int16_t *scan, const int16_t *nb,
- vp9_reader *r) {+ tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq,
+ int ctx, const int16_t *scan, const int16_t *nb,
+ vp9_reader *r) {const int max_eob = 16 << (tx_size << 1);
const FRAME_CONTEXT *const fc = &cm->fc;
FRAME_COUNTS *const counts = &cm->counts;
@@ -69,11 +72,11 @@
uint8_t token_cache[32 * 32];
const uint8_t *band_translate = get_band_translate(tx_size);
const int dq_shift = (tx_size == TX_32X32);
- int v;
+ int v, token;
int16_t dqv = dq[0];
while (c < max_eob) {- int val;
+ int val = -1;
band = *band_translate++;
prob = coef_probs[band][ctx];
if (!cm->frame_parallel_decoding_mode)
@@ -95,81 +98,46 @@
prob = coef_probs[band][ctx];
}
- // ONE_CONTEXT_NODE_0_
if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) {INCREMENT_COUNT(ONE_TOKEN);
- WRITE_COEF_CONTINUE(1, ONE_TOKEN);
- }
-
- INCREMENT_COUNT(TWO_TOKEN);
-
- prob = vp9_pareto8_full[prob[PIVOT_NODE] - 1];
-
- if (!vp9_read(r, prob[LOW_VAL_CONTEXT_NODE])) {- if (!vp9_read(r, prob[TWO_CONTEXT_NODE])) {- WRITE_COEF_CONTINUE(2, TWO_TOKEN);
+ token = ONE_TOKEN;
+ val = 1;
+ } else {+ INCREMENT_COUNT(TWO_TOKEN);
+ token = vp9_read_tree(r, coeff_subtree_high,
+ vp9_pareto8_full[prob[PIVOT_NODE] - 1]);
+ switch (token) {+ case TWO_TOKEN:
+ case THREE_TOKEN:
+ case FOUR_TOKEN:
+ val = token;
+ break;
+ case CATEGORY1_TOKEN:
+ val = CAT1_MIN_VAL + read_coeff(vp9_cat1_prob, 1, r);
+ break;
+ case CATEGORY2_TOKEN:
+ val = CAT2_MIN_VAL + read_coeff(vp9_cat2_prob, 2, r);
+ break;
+ case CATEGORY3_TOKEN:
+ val = CAT3_MIN_VAL + read_coeff(vp9_cat3_prob, 3, r);
+ break;
+ case CATEGORY4_TOKEN:
+ val = CAT4_MIN_VAL + read_coeff(vp9_cat4_prob, 4, r);
+ break;
+ case CATEGORY5_TOKEN:
+ val = CAT5_MIN_VAL + read_coeff(vp9_cat5_prob, 5, r);
+ break;
+ case CATEGORY6_TOKEN:
+ val = CAT6_MIN_VAL + read_coeff(vp9_cat6_prob, 14, r);
+ break;
}
- if (!vp9_read(r, prob[THREE_CONTEXT_NODE])) {- WRITE_COEF_CONTINUE(3, THREE_TOKEN);
- }
- WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
}
-
- if (!vp9_read(r, prob[HIGH_LOW_CONTEXT_NODE])) {- if (!vp9_read(r, prob[CAT_ONE_CONTEXT_NODE])) {- val = CAT1_MIN_VAL;
- ADJUST_COEF(vp9_cat1_prob[0], 0);
- WRITE_COEF_CONTINUE(val, CATEGORY1_TOKEN);
- }
- val = CAT2_MIN_VAL;
- ADJUST_COEF(vp9_cat2_prob[0], 1);
- ADJUST_COEF(vp9_cat2_prob[1], 0);
- WRITE_COEF_CONTINUE(val, CATEGORY2_TOKEN);
- }
-
- if (!vp9_read(r, prob[CAT_THREEFOUR_CONTEXT_NODE])) {- if (!vp9_read(r, prob[CAT_THREE_CONTEXT_NODE])) {- val = CAT3_MIN_VAL;
- ADJUST_COEF(vp9_cat3_prob[0], 2);
- ADJUST_COEF(vp9_cat3_prob[1], 1);
- ADJUST_COEF(vp9_cat3_prob[2], 0);
- WRITE_COEF_CONTINUE(val, CATEGORY3_TOKEN);
- }
- val = CAT4_MIN_VAL;
- ADJUST_COEF(vp9_cat4_prob[0], 3);
- ADJUST_COEF(vp9_cat4_prob[1], 2);
- ADJUST_COEF(vp9_cat4_prob[2], 1);
- ADJUST_COEF(vp9_cat4_prob[3], 0);
- WRITE_COEF_CONTINUE(val, CATEGORY4_TOKEN);
- }
-
- if (!vp9_read(r, prob[CAT_FIVE_CONTEXT_NODE])) {- val = CAT5_MIN_VAL;
- ADJUST_COEF(vp9_cat5_prob[0], 4);
- ADJUST_COEF(vp9_cat5_prob[1], 3);
- ADJUST_COEF(vp9_cat5_prob[2], 2);
- ADJUST_COEF(vp9_cat5_prob[3], 1);
- ADJUST_COEF(vp9_cat5_prob[4], 0);
- WRITE_COEF_CONTINUE(val, CATEGORY5_TOKEN);
- }
- val = 0;
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[0]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[1]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[2]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[3]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[4]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[5]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[6]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[7]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[8]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[9]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[10]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[11]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[12]);
- val = (val << 1) | vp9_read(r, vp9_cat6_prob[13]);
- val += CAT6_MIN_VAL;
-
- WRITE_COEF_CONTINUE(val, CATEGORY6_TOKEN);
+ v = (val * dqv) >> dq_shift;
+ dqcoeff[scan[c]] = vp9_read_bit(r) ? -v : v;
+ token_cache[scan[c]] = vp9_pt_energy_class[token];
+ ++c;
+ ctx = get_coef_context(nb, token_cache, c);
+ dqv = dq[1];
}
return c;