ref: 90932399b41252d2bdd28520d693a610eabeaa88
dir: /vp9/decoder/vp9_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 "vp9/common/vp9_blockd.h"
#include "vp9/decoder/vp9_onyxd_int.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#include "vp9/decoder/vp9_detokenize.h"
#include "vp9/common/vp9_seg_common.h"
#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 vp9_prob cat6_prob[15] = {
254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0
};
DECLARE_ALIGNED(16, extern const uint8_t, vp9_norm[256]);
static int get_signed(BOOL_DECODER *br, int value_to_sign) {
return decode_bool(br, 128) ? -value_to_sign : value_to_sign;
}
#define INCREMENT_COUNT(token) \
do { \
coef_counts[type][ref][get_coef_band(txfm_size, c)][pt][token]++; \
pt = vp9_get_coef_context(&recent_energy, token); \
} while (0)
#define WRITE_COEF_CONTINUE(val, token) \
{ \
qcoeff_ptr[scan[c]] = (int16_t) get_signed(br, val); \
INCREMENT_COUNT(token); \
c++; \
continue; \
}
#define ADJUST_COEF(prob, bits_count) \
do { \
if (vp9_read(br, prob)) \
val += (uint16_t)(1 << bits_count);\
} while (0);
static int decode_coefs(VP9D_COMP *dx, const MACROBLOCKD *xd,
BOOL_DECODER* const br, int block_idx,
PLANE_TYPE type, TX_TYPE tx_type,
int seg_eob, int16_t *qcoeff_ptr,
const int *const scan, TX_SIZE txfm_size) {
ENTROPY_CONTEXT* const A0 = (ENTROPY_CONTEXT *) xd->above_context;
ENTROPY_CONTEXT* const L0 = (ENTROPY_CONTEXT *) xd->left_context;
const int aidx = vp9_block2above[txfm_size][block_idx];
const int lidx = vp9_block2left[txfm_size][block_idx];
ENTROPY_CONTEXT above_ec = A0[aidx] != 0, left_ec = L0[lidx] != 0;
FRAME_CONTEXT *const fc = &dx->common.fc;
int recent_energy = 0;
int pt, c = 0;
vp9_coeff_probs *coef_probs;
vp9_prob *prob;
vp9_coeff_count *coef_counts;
const int ref = xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME;
switch (txfm_size) {
default:
case TX_4X4:
coef_probs = fc->coef_probs_4x4;
coef_counts = fc->coef_counts_4x4;
break;
case TX_8X8:
coef_probs = fc->coef_probs_8x8;
coef_counts = fc->coef_counts_8x8;
above_ec = (A0[aidx] + A0[aidx + 1]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1]) != 0;
break;
case TX_16X16:
coef_probs = fc->coef_probs_16x16;
coef_counts = fc->coef_counts_16x16;
if (type == PLANE_TYPE_UV) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
above_ec = (A0[aidx] + A0[aidx + 1] + A1[aidx] + A1[aidx + 1]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L1[lidx] + L1[lidx + 1]) != 0;
} else {
above_ec = (A0[aidx] + A0[aidx + 1] + A0[aidx + 2] + A0[aidx + 3]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L0[lidx + 2] + L0[lidx + 3]) != 0;
}
break;
case TX_32X32:
coef_probs = fc->coef_probs_32x32;
coef_counts = fc->coef_counts_32x32;
if (type == PLANE_TYPE_UV) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
ENTROPY_CONTEXT *A2 = (ENTROPY_CONTEXT *) (xd->above_context + 2);
ENTROPY_CONTEXT *L2 = (ENTROPY_CONTEXT *) (xd->left_context + 2);
ENTROPY_CONTEXT *A3 = (ENTROPY_CONTEXT *) (xd->above_context + 3);
ENTROPY_CONTEXT *L3 = (ENTROPY_CONTEXT *) (xd->left_context + 3);
above_ec = (A0[aidx] + A0[aidx + 1] + A1[aidx] + A1[aidx + 1] +
A2[aidx] + A2[aidx + 1] + A3[aidx] + A3[aidx + 1]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L1[lidx] + L1[lidx + 1] +
L2[lidx] + L2[lidx + 1] + L3[lidx] + L3[lidx + 1]) != 0;
} else {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
above_ec = (A0[aidx] + A0[aidx + 1] + A0[aidx + 2] + A0[aidx + 3] +
A1[aidx] + A1[aidx + 1] + A1[aidx + 2] + A1[aidx + 3]) != 0;
left_ec = (L0[lidx] + L0[lidx + 1] + L0[lidx + 2] + L0[lidx + 3] +
L1[lidx] + L1[lidx + 1] + L1[lidx + 2] + L1[lidx + 3]) != 0;
}
break;
}
VP9_COMBINEENTROPYCONTEXTS(pt, above_ec, left_ec);
while (1) {
int val;
const uint8_t *cat6 = cat6_prob;
if (c >= seg_eob)
break;
prob = coef_probs[type][ref][get_coef_band(txfm_size, c)][pt];
if (!vp9_read(br, prob[EOB_CONTEXT_NODE]))
break;
SKIP_START:
if (c >= seg_eob)
break;
if (!vp9_read(br, prob[ZERO_CONTEXT_NODE])) {
INCREMENT_COUNT(ZERO_TOKEN);
++c;
prob = coef_probs[type][ref][get_coef_band(txfm_size, c)][pt];
goto SKIP_START;
}
// ONE_CONTEXT_NODE_0_
if (!vp9_read(br, prob[ONE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(1, ONE_TOKEN);
}
// LOW_VAL_CONTEXT_NODE_0_
if (!vp9_read(br, prob[LOW_VAL_CONTEXT_NODE])) {
if (!vp9_read(br, prob[TWO_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(2, TWO_TOKEN);
}
if (!vp9_read(br, prob[THREE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(3, THREE_TOKEN);
}
WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
}
// HIGH_LOW_CONTEXT_NODE_0_
if (!vp9_read(br, prob[HIGH_LOW_CONTEXT_NODE])) {
if (!vp9_read(br, prob[CAT_ONE_CONTEXT_NODE])) {
val = CAT1_MIN_VAL;
ADJUST_COEF(CAT1_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
}
val = CAT2_MIN_VAL;
ADJUST_COEF(CAT2_PROB1, 1);
ADJUST_COEF(CAT2_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
}
// CAT_THREEFOUR_CONTEXT_NODE_0_
if (!vp9_read(br, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
if (!vp9_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, DCT_VAL_CATEGORY3);
}
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, DCT_VAL_CATEGORY4);
}
// CAT_FIVE_CONTEXT_NODE_0_:
if (!vp9_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, DCT_VAL_CATEGORY5);
}
val = 0;
while (*cat6) {
val = (val << 1) | vp9_read(br, *cat6++);
}
val += CAT6_MIN_VAL;
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
}
if (c < seg_eob)
coef_counts[type][ref][get_coef_band(txfm_size, c)][pt][DCT_EOB_TOKEN]++;
A0[aidx] = L0[lidx] = c > 0;
if (txfm_size >= TX_8X8) {
A0[aidx + 1] = L0[lidx + 1] = A0[aidx];
if (txfm_size >= TX_16X16) {
if (type == PLANE_TYPE_UV) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
A1[aidx] = A1[aidx + 1] = L1[aidx] = L1[lidx + 1] = A0[aidx];
if (txfm_size >= TX_32X32) {
ENTROPY_CONTEXT *A2 = (ENTROPY_CONTEXT *) (xd->above_context + 2);
ENTROPY_CONTEXT *L2 = (ENTROPY_CONTEXT *) (xd->left_context + 2);
ENTROPY_CONTEXT *A3 = (ENTROPY_CONTEXT *) (xd->above_context + 3);
ENTROPY_CONTEXT *L3 = (ENTROPY_CONTEXT *) (xd->left_context + 3);
A2[aidx] = A2[aidx + 1] = A3[aidx] = A3[aidx + 1] = A0[aidx];
L2[lidx] = L2[lidx + 1] = L3[lidx] = L3[lidx + 1] = A0[aidx];
}
} else {
A0[aidx + 2] = A0[aidx + 3] = L0[lidx + 2] = L0[lidx + 3] = A0[aidx];
if (txfm_size >= TX_32X32) {
ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
A1[aidx] = A1[aidx + 1] = A1[aidx + 2] = A1[aidx + 3] = A0[aidx];
L1[lidx] = L1[lidx + 1] = L1[lidx + 2] = L1[lidx + 3] = A0[aidx];
}
}
}
}
return c;
}
static int get_eob(MACROBLOCKD* const xd, int segment_id, int eob_max) {
return vp9_get_segdata(xd, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
}
int vp9_decode_sb_tokens(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
int i, eobtotal = 0, seg_eob;
// Luma block
int c = decode_coefs(pbi, xd, bc, 0, PLANE_TYPE_Y_WITH_DC,
DCT_DCT, get_eob(xd, segment_id, 1024),
xd->sb_coeff_data.qcoeff,
vp9_default_zig_zag1d_32x32, TX_32X32);
xd->eobs[0] = c;
eobtotal += c;
// 16x16 chroma blocks
seg_eob = get_eob(xd, segment_id, 256);
for (i = 16; i < 24; i += 4) {
c = decode_coefs(pbi, xd, bc, i, PLANE_TYPE_UV, DCT_DCT, seg_eob,
xd->sb_coeff_data.qcoeff + 1024 + (i - 16) * 64,
vp9_default_zig_zag1d_16x16, TX_16X16);
xd->eobs[i] = c;
eobtotal += c;
}
return eobtotal;
}
static int vp9_decode_mb_tokens_16x16(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
int i, eobtotal = 0, seg_eob;
// Luma block
int c = decode_coefs(pbi, xd, bc, 0, PLANE_TYPE_Y_WITH_DC,
get_tx_type(xd, &xd->block[0]),
get_eob(xd, segment_id, 256),
xd->qcoeff, vp9_default_zig_zag1d_16x16, TX_16X16);
xd->eobs[0] = c;
eobtotal += c;
// 8x8 chroma blocks
seg_eob = get_eob(xd, segment_id, 64);
for (i = 16; i < 24; i += 4) {
c = decode_coefs(pbi, xd, bc, i, PLANE_TYPE_UV,
DCT_DCT, seg_eob, xd->block[i].qcoeff,
vp9_default_zig_zag1d_8x8, TX_8X8);
xd->eobs[i] = c;
eobtotal += c;
}
return eobtotal;
}
static int vp9_decode_mb_tokens_8x8(VP9D_COMP* const pbi,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
int c, i, eobtotal = 0, seg_eob;
const int segment_id = xd->mode_info_context->mbmi.segment_id;
// luma blocks
seg_eob = get_eob(xd, segment_id, 64);
for (i = 0; i < 16; i += 4) {
c = decode_coefs(pbi, xd, bc, i, PLANE_TYPE_Y_WITH_DC,
get_tx_type(xd, xd->block + i),
seg_eob, xd->block[i].qcoeff,
vp9_default_zig_zag1d_8x8, TX_8X8);
xd->eobs[i] = c;
eobtotal += c;
}
// chroma blocks
if (xd->mode_info_context->mbmi.mode == I8X8_PRED ||
xd->mode_info_context->mbmi.mode == SPLITMV) {
// use 4x4 transform for U, V components in I8X8/splitmv prediction mode
seg_eob = get_eob(xd, segment_id, 16);
for (i = 16; i < 24; i++) {
c = decode_coefs(pbi, xd, bc, i, PLANE_TYPE_UV,
DCT_DCT, seg_eob, xd->block[i].qcoeff,
vp9_default_zig_zag1d_4x4, TX_4X4);
xd->eobs[i] = c;
eobtotal += c;
}
} else {
for (i = 16; i < 24; i += 4) {
c = decode_coefs(pbi, xd, bc, i, PLANE_TYPE_UV,
DCT_DCT, seg_eob, xd->block[i].qcoeff,
vp9_default_zig_zag1d_8x8, TX_8X8);
xd->eobs[i] = c;
eobtotal += c;
}
}
return eobtotal;
}
static int decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
BOOL_DECODER* const bc,
PLANE_TYPE type, int i, int seg_eob,
TX_TYPE tx_type, const int *scan) {
int c = decode_coefs(dx, xd, bc, i, type, tx_type, seg_eob,
xd->block[i].qcoeff, scan, TX_4X4);
xd->eobs[i] = c;
return c;
}
static int decode_coefs_4x4_y(VP9D_COMP *dx, MACROBLOCKD *xd,
BOOL_DECODER* const bc,
PLANE_TYPE type, int i, int seg_eob) {
const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
get_tx_type(xd, &xd->block[i]) : DCT_DCT;
const int *scan;
switch (tx_type) {
case ADST_DCT:
scan = vp9_row_scan_4x4;
break;
case DCT_ADST:
scan = vp9_col_scan_4x4;
break;
default:
scan = vp9_default_zig_zag1d_4x4;
break;
}
return decode_coefs_4x4(dx, xd, bc, type, i, seg_eob, tx_type, scan);
}
int vp9_decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
BOOL_DECODER* const bc,
PLANE_TYPE type, int i) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
const int seg_eob = get_eob(xd, segment_id, 16);
return decode_coefs_4x4_y(dx, xd, bc, type, i, seg_eob);
}
static int decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc,
int seg_eob) {
int eobtotal = 0, i;
// chroma blocks
for (i = 16; i < 24; i++) {
eobtotal += decode_coefs_4x4(dx, xd, bc, PLANE_TYPE_UV, i, seg_eob,
DCT_DCT, vp9_default_zig_zag1d_4x4);
}
return eobtotal;
}
int vp9_decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
const int segment_id = xd->mode_info_context->mbmi.segment_id;
const int seg_eob = get_eob(xd, segment_id, 16);
return decode_mb_tokens_4x4_uv(dx, xd, bc, seg_eob);
}
static int vp9_decode_mb_tokens_4x4(VP9D_COMP* const dx,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
int i, eobtotal = 0;
const int segment_id = xd->mode_info_context->mbmi.segment_id;
const int seg_eob = get_eob(xd, segment_id, 16);
// luma blocks
for (i = 0; i < 16; ++i) {
eobtotal += decode_coefs_4x4_y(dx, xd, bc,
PLANE_TYPE_Y_WITH_DC, i, seg_eob);
}
// chroma blocks
eobtotal += decode_mb_tokens_4x4_uv(dx, xd, bc, seg_eob);
return eobtotal;
}
int vp9_decode_mb_tokens(VP9D_COMP* const dx,
MACROBLOCKD* const xd,
BOOL_DECODER* const bc) {
const TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
switch (tx_size) {
case TX_16X16:
return vp9_decode_mb_tokens_16x16(dx, xd, bc);
case TX_8X8:
return vp9_decode_mb_tokens_8x8(dx, xd, bc);
default:
assert(tx_size == TX_4X4);
return vp9_decode_mb_tokens_4x4(dx, xd, bc);
}
}