ref: 08f0c7cc9c1e285c33711384834e7a3baf26bd7c
parent: de52948665bf83537dd29b8697bed0dfa5390daf
author: Deb Mukherjee <debargha@google.com>
date: Tue Nov 27 10:51:06 EST 2012
New previous coef context experiment Adds an experiment to derive the previous context of a coefficient not just from the previous coefficient in the scan order but from a combination of several neighboring coefficients previously encountered in scan order. A precomputed table of neighbors for each location for each scan type and block size is used. Currently 5 neighbors are used. Results are about 0.2% positive using a strategy where the max coef magnitude from the 5 neigbors is used to derive the context. Change-Id: Ie708b54d8e1898af742846ce2d1e2b0d89fd4ad5
--- a/configure
+++ b/configure
@@ -250,6 +250,7 @@
tx32x32
dwt32x32hybrid
cnvcontext
+ newcoefcontext
"
CONFIG_LIST="
external_build
--- a/vp9/common/vp9_alloccommon.c
+++ b/vp9/common/vp9_alloccommon.c
@@ -220,4 +220,8 @@
vp9_entropy_mode_init();
vp9_entropy_mv_init();
+
+#if CONFIG_NEWCOEFCONTEXT
+ vp9_init_neighbors();
+#endif
}
--- a/vp9/common/vp9_entropy.c
+++ b/vp9/common/vp9_entropy.c
@@ -62,6 +62,7 @@
2, 6, 10, 14,
3, 7, 11, 15
};
+
DECLARE_ALIGNED(16, const int, vp9_row_scan_4x4[16]) = {0, 1, 2, 3,
4, 5, 6, 7,
@@ -69,16 +70,16 @@
12, 13, 14, 15
};
-
DECLARE_ALIGNED(64, const int, vp9_coef_bands_8x8[64]) = { 0, 1, 2, 3, 5, 4, 4, 5,- 5, 3, 6, 3, 5, 4, 6, 6,
- 6, 5, 5, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7
- };
+ 5, 3, 6, 3, 5, 4, 6, 6,
+ 6, 5, 5, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7
+};
+
DECLARE_ALIGNED(64, const int, vp9_default_zig_zag1d_8x8[64]) = {0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5,
12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28,
@@ -118,17 +119,17 @@
25, 10, 11, 26, 41, 56, 71, 86,
101, 116, 131, 146, 161, 176, 192, 177,
162, 147, 132, 117, 102, 87, 72, 57,
- 42, 27, 12, 13, 28, 43, 58, 73,
+ 42, 27, 12, 13, 28, 43, 58, 73,
88, 103, 118, 133, 148, 163, 178, 193,
208, 224, 209, 194, 179, 164, 149, 134,
119, 104, 89, 74, 59, 44, 29, 14,
- 15, 30, 45, 60, 75, 90, 105, 120,
+ 15, 30, 45, 60, 75, 90, 105, 120,
135, 150, 165, 180, 195, 210, 225, 240,
241, 226, 211, 196, 181, 166, 151, 136,
121, 106, 91, 76, 61, 46, 31, 47,
- 62, 77, 92, 107, 122, 137, 152, 167,
+ 62, 77, 92, 107, 122, 137, 152, 167,
182, 197, 212, 227, 242, 243, 228, 213,
- 198, 183, 168, 153, 138, 123, 108, 93,
+ 198, 183, 168, 153, 138, 123, 108, 93,
78, 63, 79, 94, 109, 124, 139, 154,
169, 184, 199, 214, 229, 244, 245, 230,
215, 200, 185, 170, 155, 140, 125, 110,
@@ -530,6 +531,152 @@
#include "vp9/common/vp9_default_coef_probs.h"
+#if CONFIG_NEWCOEFCONTEXT
+
+// Neighborhood 5-tuples for various scans and blocksizes,
+// in {top, left, topleft, topright, bottomleft} order+// for each position in raster scan order.
+// -1 indicates the neighbor does not exist.
+DECLARE_ALIGNED(16, int,
+ vp9_default_zig_zag1d_4x4_neighbors[16 * MAX_NEIGHBORS]);
+DECLARE_ALIGNED(16, int,
+ vp9_col_scan_4x4_neighbors[16 * MAX_NEIGHBORS]);
+DECLARE_ALIGNED(16, int,
+ vp9_row_scan_4x4_neighbors[16 * MAX_NEIGHBORS]);
+DECLARE_ALIGNED(16, int,
+ vp9_default_zig_zag1d_8x8_neighbors[64 * MAX_NEIGHBORS]);
+DECLARE_ALIGNED(16, int,
+ vp9_default_zig_zag1d_16x16_neighbors[256 * MAX_NEIGHBORS]);
+#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
+DECLARE_ALIGNED(16, int,
+ vp9_default_zig_zag1d_32x32_neighbors[1024 * MAX_NEIGHBORS]);
+#endif
+
+static int find_in_scan(const int *scan, int l, int m) {+ int i, l2 = l * l;
+ for (i = 0; i < l2; ++i) {+ if (scan[i] == m)
+ return i;
+ }
+ return -1;
+}
+
+static void init_scan_neighbors(const int *scan, int l, int *neighbors) {+ int l2 = l * l;
+ int m, n, i, j, k;
+ for (n = 0; n < l2; ++n) {+ int locn = find_in_scan(scan, l, n);
+ int z = -1;
+ i = n / l;
+ j = n % l;
+ for (k = 0; k < MAX_NEIGHBORS; ++k)
+ neighbors[MAX_NEIGHBORS * n + k] = -1;
+ if (i - 1 >= 0) {+ m = (i - 1) * l + j;
+ if (find_in_scan(scan, l, m) < locn) {+ neighbors[MAX_NEIGHBORS * n] = m;
+ if (m == 0) z = 0;
+ }
+ }
+ if (j - 1 >= 0) {+ m = i * l + j - 1;
+ if (find_in_scan(scan, l, m) < locn) {+ neighbors[MAX_NEIGHBORS * n + 1] = m;
+ if (m == 0) z = 1;
+ }
+ }
+ if (i - 1 >= 0 && j - 1 >= 0) {+ m = (i - 1) * l + j - 1;
+ if (find_in_scan(scan, l, m) < locn) {+ neighbors[MAX_NEIGHBORS * n + 2] = m;
+ if (m == 0) z = 2;
+ }
+ }
+ if (i - 1 >= 0 && j + 1 < l) {+ m = (i - 1) * l + j + 1;
+ if (find_in_scan(scan, l, m) < locn) {+ neighbors[MAX_NEIGHBORS * n + 3] = m;
+ if (m == 0) z = 3;
+ }
+ }
+ if (i + 1 < l && j - 1 >= 0) {+ m = (i + 1) * l + j - 1;
+ if (find_in_scan(scan, l, m) < locn) {+ neighbors[MAX_NEIGHBORS * n + 4] = m;
+ if (m == 0) z = 4;
+ }
+ }
+ if (z != -1) { // zero exists+ int v = 0;
+ for (k = 0; k < MAX_NEIGHBORS; ++k)
+ v += (neighbors[MAX_NEIGHBORS * n + k] > 0);
+ if (v) {+ neighbors[MAX_NEIGHBORS * n + z] = -1;
+ }
+ }
+ }
+}
+
+void vp9_init_neighbors() {+ init_scan_neighbors(vp9_default_zig_zag1d_4x4, 4,
+ vp9_default_zig_zag1d_4x4_neighbors);
+ init_scan_neighbors(vp9_row_scan_4x4, 4,
+ vp9_row_scan_4x4_neighbors);
+ init_scan_neighbors(vp9_col_scan_4x4, 4,
+ vp9_col_scan_4x4_neighbors);
+ init_scan_neighbors(vp9_default_zig_zag1d_8x8, 8,
+ vp9_default_zig_zag1d_8x8_neighbors);
+ init_scan_neighbors(vp9_default_zig_zag1d_16x16, 16,
+ vp9_default_zig_zag1d_16x16_neighbors);
+#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
+ init_scan_neighbors(vp9_default_zig_zag1d_32x32, 32,
+ vp9_default_zig_zag1d_32x32_neighbors);
+#endif
+}
+
+const int *vp9_get_coef_neighbors_handle(const int *scan) {+ if (scan == vp9_default_zig_zag1d_4x4) {+ return vp9_default_zig_zag1d_4x4_neighbors;
+ } else if (scan == vp9_row_scan_4x4) {+ return vp9_row_scan_4x4_neighbors;
+ } else if (scan == vp9_col_scan_4x4) {+ return vp9_col_scan_4x4_neighbors;
+ } else if (scan == vp9_default_zig_zag1d_8x8) {+ return vp9_default_zig_zag1d_8x8_neighbors;
+ } else if (scan == vp9_default_zig_zag1d_16x16) {+ return vp9_default_zig_zag1d_16x16_neighbors;
+#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
+ } else if (scan == vp9_default_zig_zag1d_32x32) {+ return vp9_default_zig_zag1d_32x32_neighbors;
+#endif
+ }
+ return vp9_default_zig_zag1d_4x4_neighbors;
+}
+
+int vp9_get_coef_neighbor_context(const short int *qcoeff_ptr, int nodc,
+ const int *neigbor_handle, int rc) {+ static int neighbors_used = MAX_NEIGHBORS; // maximum is MAX_NEIGHBORS
+ const int *nb = neigbor_handle + rc * MAX_NEIGHBORS;
+ int i, v, val = 0, n = 0;
+ for (i = 0; i < neighbors_used; ++i) {+ if (nb[i] == -1 || (nb[i] == 0 && nodc)) {+ continue;
+ }
+ v = abs(qcoeff_ptr[nb[i]]);
+ val = (v > val ? v : val);
+ n++;
+ }
+ if (n == 0)
+ return 0;
+ else if (val <= 1)
+ return val;
+ else if (val < 4)
+ return 2;
+ else
+ return 3;
+}
+#endif /* CONFIG_NEWCOEFCONTEXT */
+
void vp9_default_coef_probs(VP9_COMMON *pc) {vpx_memcpy(pc->fc.coef_probs_4x4, default_coef_probs_4x4,
sizeof(pc->fc.coef_probs_4x4));
@@ -546,7 +693,6 @@
vpx_memcpy(pc->fc.hybrid_coef_probs_16x16,
default_hybrid_coef_probs_16x16,
sizeof(pc->fc.hybrid_coef_probs_16x16));
-
#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
vpx_memcpy(pc->fc.coef_probs_32x32, default_coef_probs_32x32,
sizeof(pc->fc.coef_probs_32x32));
--- a/vp9/common/vp9_entropy.h
+++ b/vp9/common/vp9_entropy.h
@@ -98,7 +98,7 @@
distinct bands). */
/*# define DC_TOKEN_CONTEXTS 3*/ /* 00, 0!0, !0!0 */
-#define PREV_COEF_CONTEXTS 4
+#define PREV_COEF_CONTEXTS 4
typedef unsigned int vp9_coeff_count[COEF_BANDS][PREV_COEF_CONTEXTS]
[MAX_ENTROPY_TOKENS];
@@ -127,13 +127,36 @@
#endif
void vp9_coef_tree_initialize(void);
-
void vp9_adapt_coef_probs(struct VP9Common *);
static void vp9_reset_mb_tokens_context(MACROBLOCKD* const xd) {/* Clear entropy contexts */
- vpx_memset(xd->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
- vpx_memset(xd->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
+ vpx_memset(xd->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
+ vpx_memset(xd->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
}
+#if CONFIG_NEWCOEFCONTEXT
+
+#define MAX_NEIGHBORS 5
+#define NEWCOEFCONTEXT_BAND_COND(b) ((b) >= 1)
+void vp9_init_neighbors(void);
+
+const int *vp9_get_coef_neighbors_handle(const int *scan);
+int vp9_get_coef_neighbor_context(const short int *qcoeff_ptr, int nodc,
+ const int *neigbor_handle, int rc);
+extern DECLARE_ALIGNED(16, int, vp9_default_zig_zag1d_4x4_neighbors[
+ 16 * MAX_NEIGHBORS]);
+extern DECLARE_ALIGNED(16, int, vp9_row_scan_4x4_neighbors[
+ 16 * MAX_NEIGHBORS]);
+extern DECLARE_ALIGNED(16, int, vp9_col_scan_4x4_neighbors[
+ 16 * MAX_NEIGHBORS]);
+extern DECLARE_ALIGNED(16, int, vp9_default_zig_zag1d_8x8_neighbors[
+ 64 * MAX_NEIGHBORS]);
+extern DECLARE_ALIGNED(16, int, vp9_default_zig_zag1d_16x16_neighbors[
+ 256 * MAX_NEIGHBORS]);
+#if CONFIG_SUPERBLOCKS && CONFIG_TX32X32
+extern DECLARE_ALIGNED(16, int, vp9_default_zig_zag1d_32x32_neighbors[
+ 1024 * MAX_NEIGHBORS]);
+#endif
+#endif // CONFIG_NEWCOEFCONTEXT
#endif // VP9_COMMON_VP9_ENTROPY_H_
--- a/vp9/decoder/vp9_detokenize.c
+++ b/vp9/decoder/vp9_detokenize.c
@@ -63,11 +63,24 @@
return decode_bool(br, 128) ? -value_to_sign : value_to_sign;
}
-#define INCREMENT_COUNT(token) \
- do { \+#if CONFIG_NEWCOEFCONTEXT
+#define PT pn
+#define INCREMENT_COUNT(token) \
+ do { \+ coef_counts[type][coef_bands[c]][pn][token]++; \
+ pn = pt = vp9_prev_token_class[token]; \
+ if (c < seg_eob - 1 && NEWCOEFCONTEXT_BAND_COND(coef_bands[c + 1])) \
+ pn = vp9_get_coef_neighbor_context( \
+ qcoeff_ptr, nodc, neighbors, scan[c + 1]); \
+ } while (0)
+#else
+#define PT pt
+#define INCREMENT_COUNT(token) \
+ do { \coef_counts[type][coef_bands[c]][pt][token]++; \
pt = vp9_prev_token_class[token]; \
} while (0)
+#endif /* CONFIG_NEWCOEFCONTEXT */
#define WRITE_COEF_CONTINUE(val, token) \
{ \@@ -92,7 +105,12 @@
const int *const scan, TX_SIZE txfm_size,
const int *coef_bands) {FRAME_CONTEXT *const fc = &dx->common.fc;
- int pt, c = (type == PLANE_TYPE_Y_NO_DC);
+#if CONFIG_NEWCOEFCONTEXT
+ const int *neighbors;
+ int pn;
+#endif
+ int nodc = (type == PLANE_TYPE_Y_NO_DC);
+ int pt, c = nodc;
vp9_coeff_probs *coef_probs;
vp9_prob *prob;
vp9_coeff_count *coef_counts;
@@ -135,11 +153,15 @@
}
VP9_COMBINEENTROPYCONTEXTS(pt, *a, *l);
+#if CONFIG_NEWCOEFCONTEXT
+ pn = pt;
+ neighbors = vp9_get_coef_neighbors_handle(scan);
+#endif
while (1) {int val;
const uint8_t *cat6 = cat6_prob;
if (c >= seg_eob) break;
- prob = coef_probs[type][coef_bands[c]][pt];
+ prob = coef_probs[type][coef_bands[c]][PT];
if (!vp9_read(br, prob[EOB_CONTEXT_NODE]))
break;
SKIP_START:
@@ -147,7 +169,7 @@
if (!vp9_read(br, prob[ZERO_CONTEXT_NODE])) {INCREMENT_COUNT(ZERO_TOKEN);
++c;
- prob = coef_probs[type][coef_bands[c]][pt];
+ prob = coef_probs[type][coef_bands[c]][PT];
goto SKIP_START;
}
// ONE_CONTEXT_NODE_0_
@@ -211,7 +233,7 @@
}
if (c < seg_eob)
- coef_counts[type][coef_bands[c]][pt][DCT_EOB_TOKEN]++;
+ coef_counts[type][coef_bands[c]][PT][DCT_EOB_TOKEN]++;
a[0] = l[0] = (c > !type);
--- a/vp9/encoder/vp9_encodemb.c
+++ b/vp9/encoder/vp9_encodemb.c
@@ -380,6 +380,9 @@
int err_mult = plane_rd_mult[type];
int default_eob;
int const *scan, *bands;
+#if CONFIG_NEWCOEFCONTEXT
+ const int *neighbors;
+#endif
switch (tx_size) {default:
@@ -421,6 +424,9 @@
default_eob = 256;
break;
}
+#if CONFIG_NEWCOEFCONTEXT
+ neighbors = vp9_get_coef_neighbors_handle(scan);
+#endif
/* Now set up a Viterbi trellis to evaluate alternative roundings. */
rdmult = mb->rdmult * err_mult;
@@ -454,6 +460,11 @@
if (next < default_eob) {band = bands[i + 1];
pt = vp9_prev_token_class[t0];
+#if CONFIG_NEWCOEFCONTEXT
+ if (NEWCOEFCONTEXT_BAND_COND(band))
+ pt = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, i0, neighbors, scan[i + 1]);
+#endif
rate0 +=
mb->token_costs[tx_size][type][band][pt][tokens[next][0].token];
rate1 +=
@@ -501,12 +512,34 @@
if (next < default_eob) {band = bands[i + 1];
if (t0 != DCT_EOB_TOKEN) {+#if CONFIG_NEWCOEFCONTEXT
+ int tmp = qcoeff_ptr[scan[i]];
+ qcoeff_ptr[scan[i]] = x;
+ if (NEWCOEFCONTEXT_BAND_COND(band))
+ pt = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, i0, neighbors, scan[i + 1]);
+ else
+ pt = vp9_prev_token_class[t0];
+ qcoeff_ptr[scan[i]] = tmp;
+#else
pt = vp9_prev_token_class[t0];
+#endif
rate0 += mb->token_costs[tx_size][type][band][pt][
tokens[next][0].token];
}
if (t1 != DCT_EOB_TOKEN) {+#if CONFIG_NEWCOEFCONTEXT
+ int tmp = qcoeff_ptr[scan[i]];
+ qcoeff_ptr[scan[i]] = x;
+ if (NEWCOEFCONTEXT_BAND_COND(band))
+ pt = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, i0, neighbors, scan[i + 1]);
+ else
+ pt = vp9_prev_token_class[t1];
+ qcoeff_ptr[scan[i]] = tmp;
+#else
pt = vp9_prev_token_class[t1];
+#endif
rate1 += mb->token_costs[tx_size][type][band][pt][
tokens[next][1].token];
}
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -513,18 +513,32 @@
}
+#if CONFIG_NEWCOEFCONTEXT
+#define PT pn
+#else
+#define PT pt
+#endif
+
static int cost_coeffs_2x2(MACROBLOCK *mb,
BLOCKD *b, PLANE_TYPE type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l) {- int c = (type == PLANE_TYPE_Y_NO_DC); /* start at coef 0, unless Y with Y2 */
+ int nodc = (type == PLANE_TYPE_Y_NO_DC);
+ int c = nodc; /* start at coef 0, unless Y with Y2 */
int eob = b->eob;
int pt; /* surrounding block/prev coef predictor */
int cost = 0;
int16_t *qcoeff_ptr = b->qcoeff;
+#if CONFIG_NEWCOEFCONTEXT
+ const int *neighbors = vp9_default_zig_zag1d_4x4_neighbors;
+ int pn;
+#endif
VP9_COMBINEENTROPYCONTEXTS(pt, *a, *l);
assert(eob <= 4);
+#if CONFIG_NEWCOEFCONTEXT
+ pn = pt;
+#endif
for (; c < eob; c++) {int v = qcoeff_ptr[vp9_default_zig_zag1d_4x4[c]];
int t = vp9_dct_value_tokens_ptr[v].Token;
@@ -531,11 +545,16 @@
cost += mb->token_costs[TX_8X8][type][vp9_coef_bands_4x4[c]][pt][t];
cost += vp9_dct_value_cost_ptr[v];
pt = vp9_prev_token_class[t];
+#if CONFIG_NEWCOEFCONTEXT
+ if (c < 4 - 1)
+ pn = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, nodc, neighbors, vp9_default_zig_zag1d_4x4[c + 1]);
+#endif
}
if (c < 4)
cost += mb->token_costs[TX_8X8][type][vp9_coef_bands_4x4[c]]
- [pt] [DCT_EOB_TOKEN];
+ [PT][DCT_EOB_TOKEN];
// is eob first coefficient;
pt = (c > !type);
*a = *l = pt;
@@ -546,7 +565,8 @@
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l,
TX_SIZE tx_size) {const int eob = b->eob;
- int c = (type == PLANE_TYPE_Y_NO_DC); /* start at coef 0, unless Y with Y2 */
+ int nodc = (type == PLANE_TYPE_Y_NO_DC);
+ int c = nodc; /* start at coef 0, unless Y with Y2 */
int cost = 0, default_eob, seg_eob;
int pt; /* surrounding block/prev coef predictor */
int const *scan, *band;
@@ -555,6 +575,10 @@
MB_MODE_INFO *mbmi = &mb->e_mbd.mode_info_context->mbmi;
TX_TYPE tx_type = DCT_DCT;
int segment_id = mbmi->segment_id;
+#if CONFIG_NEWCOEFCONTEXT
+ const int *neighbors;
+ int pn;
+#endif
scan = vp9_default_zig_zag1d_4x4;
band = vp9_coef_bands_4x4;
default_eob = 16;
@@ -628,17 +652,28 @@
VP9_COMBINEENTROPYCONTEXTS(pt, *a, *l);
+#if CONFIG_NEWCOEFCONTEXT
+ neighbors = vp9_get_coef_neighbors_handle(scan);
+ pn = pt;
+#endif
if (tx_type != DCT_DCT) { for (; c < eob; c++) {int v = qcoeff_ptr[scan[c]];
int t = vp9_dct_value_tokens_ptr[v].Token;
- cost += mb->hybrid_token_costs[tx_size][type][band[c]][pt][t];
+ cost += mb->hybrid_token_costs[tx_size][type][band[c]][PT][t];
cost += vp9_dct_value_cost_ptr[v];
pt = vp9_prev_token_class[t];
+#if CONFIG_NEWCOEFCONTEXT
+ if (c < seg_eob - 1 && NEWCOEFCONTEXT_BAND_COND(band[c + 1]))
+ pn = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, nodc, neighbors, scan[c + 1]);
+ else
+ pn = pt;
+#endif
}
if (c < seg_eob)
cost += mb->hybrid_token_costs[tx_size][type][band[c]]
- [pt][DCT_EOB_TOKEN];
+ [PT][DCT_EOB_TOKEN];
} else { for (; c < eob; c++) {int v = qcoeff_ptr[scan[c]];
@@ -646,10 +681,17 @@
cost += mb->token_costs[tx_size][type][band[c]][pt][t];
cost += vp9_dct_value_cost_ptr[v];
pt = vp9_prev_token_class[t];
+#if CONFIG_NEWCOEFCONTEXT
+ if (c < seg_eob - 1 && NEWCOEFCONTEXT_BAND_COND(band[c + 1]))
+ pn = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, nodc, neighbors, scan[c + 1]);
+ else
+ pn = pt;
+#endif
}
if (c < seg_eob)
cost += mb->token_costs[tx_size][type][band[c]]
- [pt][DCT_EOB_TOKEN];
+ [PT][DCT_EOB_TOKEN];
}
// is eob first coefficient;
--- a/vp9/encoder/vp9_tokenize.c
+++ b/vp9/encoder/vp9_tokenize.c
@@ -103,6 +103,13 @@
vp9_dct_value_tokens_ptr = dct_value_tokens + DCT_MAX_VALUE;
vp9_dct_value_cost_ptr = dct_value_cost + DCT_MAX_VALUE;
}
+
+#if CONFIG_NEWCOEFCONTEXT
+#define PT pn
+#else
+#define PT pt
+#endif
+
static void tokenize_b(VP9_COMP *cpi,
MACROBLOCKD *xd,
const int ib,
@@ -123,6 +130,10 @@
vp9_coeff_probs *probs;
const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
get_tx_type(xd, b) : DCT_DCT;
+#if CONFIG_NEWCOEFCONTEXT
+ const int *neighbors;
+ int pn;
+#endif
ENTROPY_CONTEXT *const a = (ENTROPY_CONTEXT *)xd->above_context +
vp9_block2above[tx_size][ib];
@@ -229,6 +240,10 @@
}
VP9_COMBINEENTROPYCONTEXTS(pt, a_ec, l_ec);
+#if CONFIG_NEWCOEFCONTEXT
+ neighbors = vp9_get_coef_neighbors_handle(scan);
+ pn = pt;
+#endif
if (vp9_segfeature_active(xd, segment_id, SEG_LVL_EOB))
seg_eob = vp9_get_segdata(xd, segment_id, SEG_LVL_EOB);
@@ -249,14 +264,21 @@
}
t->Token = token;
- t->context_tree = probs[type][band][pt];
+ t->context_tree = probs[type][band][PT];
t->skip_eob_node = (pt == 0) && ((band > 0 && type != PLANE_TYPE_Y_NO_DC) ||
(band > 1 && type == PLANE_TYPE_Y_NO_DC));
assert(vp9_coef_encodings[t->Token].Len - t->skip_eob_node > 0);
if (!dry_run) {- ++counts[type][band][pt][token];
+ ++counts[type][band][PT][token];
}
pt = vp9_prev_token_class[token];
+#if CONFIG_NEWCOEFCONTEXT
+ if (c < seg_eob - 1 && NEWCOEFCONTEXT_BAND_COND(bands[c + 1]))
+ pn = vp9_get_coef_neighbor_context(
+ qcoeff_ptr, (type == PLANE_TYPE_Y_NO_DC), neighbors, scan[c + 1]);
+ else
+ pn = pt;
+#endif
++t;
} while (c < eob && ++c < seg_eob);
--
⑨