ref: e65f5987f6eea95bfbb0876cc0a966d1d82f5841
dir: /vp8/decoder/detokenize.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp8/common/type_aliases.h"
#include "vp8/common/blockd.h"
#include "onyxd_int.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#include "detokenize.h"
#include "vp8/common/seg_common.h"
#define BOOL_DATA UINT8
#define OCB_X PREV_COEF_CONTEXTS * ENTROPY_NODES
DECLARE_ALIGNED(16, int, coef_bands_x[16]) =
{
0 * OCB_X, 1 * OCB_X, 2 * OCB_X, 3 * OCB_X,
6 * OCB_X, 4 * OCB_X, 5 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X
};
DECLARE_ALIGNED(16, int, coef_bands_x_8x8[64]) =
{
0 * OCB_X, 1 * OCB_X, 2 * OCB_X, 3 * OCB_X, 5 * OCB_X, 4 * OCB_X, 4 * OCB_X, 5 * OCB_X,
5 * OCB_X, 3 * OCB_X, 6 * OCB_X, 3 * OCB_X, 5 * OCB_X, 4 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 5 * OCB_X, 5 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
};
#define EOB_CONTEXT_NODE 0
#define ZERO_CONTEXT_NODE 1
#define ONE_CONTEXT_NODE 2
#define LOW_VAL_CONTEXT_NODE 3
#define TWO_CONTEXT_NODE 4
#define THREE_CONTEXT_NODE 5
#define HIGH_LOW_CONTEXT_NODE 6
#define CAT_ONE_CONTEXT_NODE 7
#define CAT_THREEFOUR_CONTEXT_NODE 8
#define CAT_THREE_CONTEXT_NODE 9
#define CAT_FIVE_CONTEXT_NODE 10
#define CAT1_MIN_VAL 5
#define CAT2_MIN_VAL 7
#define CAT3_MIN_VAL 11
#define CAT4_MIN_VAL 19
#define CAT5_MIN_VAL 35
#define CAT6_MIN_VAL 67
#define CAT1_PROB0 159
#define CAT2_PROB0 145
#define CAT2_PROB1 165
#define CAT3_PROB0 140
#define CAT3_PROB1 148
#define CAT3_PROB2 173
#define CAT4_PROB0 135
#define CAT4_PROB1 140
#define CAT4_PROB2 155
#define CAT4_PROB3 176
#define CAT5_PROB0 130
#define CAT5_PROB1 134
#define CAT5_PROB2 141
#define CAT5_PROB3 157
#define CAT5_PROB4 180
static const unsigned char cat6_prob[14] =
{ 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0 };
void vp8_reset_mb_tokens_context(MACROBLOCKD *x)
{
/* Clear entropy contexts for Y2 blocks */
if (x->mode_info_context->mbmi.mode != B_PRED &&
x->mode_info_context->mbmi.mode != I8X8_PRED &&
x->mode_info_context->mbmi.mode != SPLITMV)
{
vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
}
else
{
vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1);
vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1);
}
}
DECLARE_ALIGNED(16, extern const unsigned char, vp8_norm[256]);
//#define PREV_CONTEXT_INC(val) (2+((val)>2))
//#define PREV_CONTEXT_INC(val) (vp8_prev_token_class[(val)])
#if CONFIG_EXPANDED_COEF_CONTEXT
#define PREV_CONTEXT_INC(val) (vp8_prev_token_class[(val)>10?10:(val)])
#else
#define PREV_CONTEXT_INC(val) (2)
#endif
#if CONFIG_ADAPTIVE_ENTROPY
int get_token(int v)
{
if (v < 0) v = -v;
if (v == 0) return ZERO_TOKEN;
else if (v == 1) return ONE_TOKEN;
else if (v == 2) return TWO_TOKEN;
else if (v == 3) return THREE_TOKEN;
else if (v == 4) return FOUR_TOKEN;
else if (v <= 6) return DCT_VAL_CATEGORY1;
else if (v <= 10) return DCT_VAL_CATEGORY2;
else if (v <= 18) return DCT_VAL_CATEGORY3;
else if (v <= 34) return DCT_VAL_CATEGORY4;
else if (v <= 66) return DCT_VAL_CATEGORY5;
else return DCT_VAL_CATEGORY6;
}
void static count_tokens(INT16 *qcoeff_ptr, int block, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l,
int eob, int seg_eob, FRAME_CONTEXT* const fc)
{
int c, pt, token, band;
VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
for (c = !type; c < eob; ++c)
{
int rc = vp8_default_zig_zag1d[c];
int v = qcoeff_ptr[rc];
band = vp8_coef_bands[c];
token = get_token(v);
fc->coef_counts[type][band][pt][token]++;
pt = vp8_prev_token_class[token];
}
if (eob < seg_eob)
{
band = vp8_coef_bands[c];
fc->coef_counts[type][band][pt][DCT_EOB_TOKEN]++;
}
}
void static count_tokens_8x8(INT16 *qcoeff_ptr, int block, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l,
int eob, int seg_eob, FRAME_CONTEXT *fc)
{
int c, pt, token, band;
VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
for (c = !type; c < eob; ++c)
{
int rc = (type == 1 ? vp8_default_zig_zag1d[c] : vp8_default_zig_zag1d_8x8[c]);
int v = qcoeff_ptr[rc];
band = (type == 1 ? vp8_coef_bands[c] : vp8_coef_bands_8x8[c]);
token = get_token(v);
fc->coef_counts_8x8[type][band][pt][token]++;
pt = vp8_prev_token_class[token];
}
if (eob < seg_eob)
{
band = (type == 1 ? vp8_coef_bands[c] : vp8_coef_bands_8x8[c]);
fc->coef_counts_8x8[type][band][pt][DCT_EOB_TOKEN]++;
}
}
#endif
static int vp8_get_signed(BOOL_DECODER *br, int value_to_sign)
{
const int split = (br->range + 1) >> 1;
const VP8_BD_VALUE bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8);
int v;
if (br->count < 0)
vp8dx_bool_decoder_fill(br);
if (br->value < bigsplit) {
br->range = split;
v = value_to_sign;
}
else {
br->range = br->range - split;
br->value = br->value - bigsplit;
v = -value_to_sign;
}
br->range += br->range;
br->value += br->value;
--br->count;
return v;
}
#define WRITE_COEF_CONTINUE(val) \
{ \
Prob = coef_probs + (ENTROPY_NODES*PREV_CONTEXT_INC(val));\
qcoeff_ptr[scan[c]] = (INT16) vp8_get_signed(br, val); \
c++; \
continue; \
}
#define ADJUST_COEF(prob, bits_count) \
do { \
if (vp8_read(br, prob)) \
val += (UINT16)(1 << bits_count);\
} while (0);
static int vp8_decode_coefs(VP8D_COMP *dx, const MACROBLOCKD *xd,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l, int type,
int seg_eob, INT16 *qcoeff_ptr, int i,
const int* const scan, int block_type,
const int* coef_bands)
{
FRAME_CONTEXT* const fc = &dx->common.fc;
BOOL_DECODER *br = xd->current_bc;
int tmp, c = (type == 0);
const vp8_prob *Prob;
const vp8_prob *coef_probs =
(block_type == TX_4X4) ? fc->coef_probs[type][0][0]
: fc->coef_probs_8x8[type][0][0];
VP8_COMBINEENTROPYCONTEXTS(tmp, *a, *l);
Prob = coef_probs + tmp * ENTROPY_NODES;
while (1) {
int val;
const uint8_t* cat6 = cat6_prob;
if (c == seg_eob) break;
Prob += coef_bands[c];
if (!vp8_read(br, Prob[EOB_CONTEXT_NODE]))
break;
SKIP_START:
if (c == seg_eob) break;
if (!vp8_read(br, Prob[ZERO_CONTEXT_NODE])) {
++c;
Prob = coef_probs + coef_bands[c];
goto SKIP_START;
}
// ONE_CONTEXT_NODE_0_
if (!vp8_read(br, Prob[ONE_CONTEXT_NODE])) {
Prob = coef_probs + ENTROPY_NODES;
qcoeff_ptr[scan[c]] = (INT16) vp8_get_signed(br, 1);
++c;
continue;
}
// LOW_VAL_CONTEXT_NODE_0_
if (!vp8_read(br, Prob[LOW_VAL_CONTEXT_NODE])) {
if (!vp8_read(br, Prob[TWO_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(2);
}
if (!vp8_read(br, Prob[THREE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(3);
}
WRITE_COEF_CONTINUE(4);
}
// HIGH_LOW_CONTEXT_NODE_0_
if (!vp8_read(br, Prob[HIGH_LOW_CONTEXT_NODE])) {
if (!vp8_read(br, Prob[CAT_ONE_CONTEXT_NODE])) {
val = CAT1_MIN_VAL;
ADJUST_COEF(CAT1_PROB0, 0);
WRITE_COEF_CONTINUE(val);
}
val = CAT2_MIN_VAL;
ADJUST_COEF(CAT2_PROB1, 1);
ADJUST_COEF(CAT2_PROB0, 0);
WRITE_COEF_CONTINUE(val);
}
// CAT_THREEFOUR_CONTEXT_NODE_0_
if (!vp8_read(br, Prob[CAT_THREEFOUR_CONTEXT_NODE])) {
if (!vp8_read(br, Prob[CAT_THREE_CONTEXT_NODE])) {
val = CAT3_MIN_VAL;
ADJUST_COEF(CAT3_PROB2, 2);
ADJUST_COEF(CAT3_PROB1, 1);
ADJUST_COEF(CAT3_PROB0, 0);
WRITE_COEF_CONTINUE(val);
}
val = CAT4_MIN_VAL;
ADJUST_COEF(CAT4_PROB3, 3);
ADJUST_COEF(CAT4_PROB2, 2);
ADJUST_COEF(CAT4_PROB1, 1);
ADJUST_COEF(CAT4_PROB0, 0);
WRITE_COEF_CONTINUE(val);
}
// CAT_FIVE_CONTEXT_NODE_0_:
if (!vp8_read(br, Prob[CAT_FIVE_CONTEXT_NODE])) {
val = CAT5_MIN_VAL;
ADJUST_COEF(CAT5_PROB4, 4);
ADJUST_COEF(CAT5_PROB3, 3);
ADJUST_COEF(CAT5_PROB2, 2);
ADJUST_COEF(CAT5_PROB1, 1);
ADJUST_COEF(CAT5_PROB0, 0);
WRITE_COEF_CONTINUE(val);
}
val = 0;
while (*cat6) {
val = (val << 1) | vp8_read(br, *cat6++);
}
val += CAT6_MIN_VAL;
WRITE_COEF_CONTINUE(val);
}
#if CONFIG_ADAPTIVE_ENTROPY
if (block_type == TX_4X4)
count_tokens(qcoeff_ptr, i, type, a, l, c, seg_eob, fc);
else
count_tokens_8x8(qcoeff_ptr, i, type, a, l, c, seg_eob, fc);
#endif
return c;
}
int vp8_decode_mb_tokens_8x8(VP8D_COMP *pbi, MACROBLOCKD *xd)
{
ENTROPY_CONTEXT* const A = (ENTROPY_CONTEXT *)xd->above_context;
ENTROPY_CONTEXT* const L = (ENTROPY_CONTEXT *)xd->left_context;
char* const eobs = xd->eobs;
int c, i, type, eobtotal = 0, seg_eob;
const int segment_id = xd->mode_info_context->mbmi.segment_id;
const int seg_active = segfeature_active(xd, segment_id, SEG_LVL_EOB);
INT16 *qcoeff_ptr = &xd->qcoeff[0];
if (xd->mode_info_context->mbmi.mode != B_PRED &&
xd->mode_info_context->mbmi.mode != SPLITMV)
{
ENTROPY_CONTEXT* const a = A + vp8_block2above_8x8[24];
ENTROPY_CONTEXT* const l = L + vp8_block2left_8x8[24];
const int* const scan = vp8_default_zig_zag1d;
type = PLANE_TYPE_Y2;
if (seg_active)
seg_eob = get_segdata(xd, segment_id, SEG_LVL_EOB);
else
seg_eob = 4;
c = vp8_decode_coefs(pbi, xd, a, l, type, seg_eob, qcoeff_ptr + 24*16,
24, scan, TX_8X8, coef_bands_x);
a[0] = l[0] = ((eobs[24] = c) != !type);
eobtotal += c - 4;
type = PLANE_TYPE_Y_NO_DC;
}
else
type = PLANE_TYPE_Y_WITH_DC;
if (seg_active)
seg_eob = get_segdata(xd, segment_id, SEG_LVL_EOB);
else
seg_eob = 64;
for (i = 0; i < 24; i += 4)
{
ENTROPY_CONTEXT* const a = A + vp8_block2above_8x8[i];
ENTROPY_CONTEXT* const l = L + vp8_block2left_8x8[i];
const int* const scan = vp8_default_zig_zag1d_8x8;
if (i == 16)
type = PLANE_TYPE_UV;
c = vp8_decode_coefs(pbi, xd, a, l, type, seg_eob, qcoeff_ptr,
i, scan, TX_8X8, coef_bands_x_8x8);
a[0] = l[0] = ((eobs[i] = c) != !type);
a[1] = a[0];
l[1] = l[0];
eobtotal += c;
qcoeff_ptr += 64;
}
return eobtotal;
}
int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *xd)
{
ENTROPY_CONTEXT* const A = (ENTROPY_CONTEXT *)xd->above_context;
ENTROPY_CONTEXT* const L = (ENTROPY_CONTEXT *)xd->left_context;
char* const eobs = xd->eobs;
const int* const scan = vp8_default_zig_zag1d;
int c, i, type, eobtotal = 0, seg_eob = 16;
INT16 *qcoeff_ptr = &xd->qcoeff[0];
int segment_id = xd->mode_info_context->mbmi.segment_id;
if (segfeature_active(xd, segment_id, SEG_LVL_EOB))
seg_eob = get_segdata(xd, segment_id, SEG_LVL_EOB);
if (xd->mode_info_context->mbmi.mode != B_PRED &&
xd->mode_info_context->mbmi.mode != I8X8_PRED &&
xd->mode_info_context->mbmi.mode != SPLITMV) {
ENTROPY_CONTEXT* const a = A + vp8_block2above[24];
ENTROPY_CONTEXT* const l = L + vp8_block2left[24];
type = PLANE_TYPE_Y2;
c = vp8_decode_coefs(dx, xd, a, l, type, seg_eob, qcoeff_ptr + 24*16, 24,
scan, TX_4X4, coef_bands_x);
a[0] = l[0] = ((eobs[24] = c) != !type);
eobtotal += c - 16;
type = PLANE_TYPE_Y_NO_DC;
}
else {
type = PLANE_TYPE_Y_WITH_DC;
}
for (i = 0; i < 24; ++i) {
ENTROPY_CONTEXT* const a = A + vp8_block2above[i];
ENTROPY_CONTEXT* const l = L + vp8_block2left[i];
if (i == 16)
type = PLANE_TYPE_UV;
c = vp8_decode_coefs(dx, xd, a, l, type, seg_eob, qcoeff_ptr,
i, scan, TX_4X4, coef_bands_x);
a[0] = l[0] = ((eobs[i] = c) != !type);
eobtotal += c;
qcoeff_ptr += 16;
}
return eobtotal;
}