479 строки
17 KiB
C
479 строки
17 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vp9/common/vp9_blockd.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/decoder/vp9_onyxd_int.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vpx_ports/mem.h"
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#include "vp9/decoder/vp9_detokenize.h"
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#include "vp9/common/vp9_seg_common.h"
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#define EOB_CONTEXT_NODE 0
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#define ZERO_CONTEXT_NODE 1
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#define ONE_CONTEXT_NODE 2
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#define LOW_VAL_CONTEXT_NODE 3
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#define TWO_CONTEXT_NODE 4
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#define THREE_CONTEXT_NODE 5
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#define HIGH_LOW_CONTEXT_NODE 6
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#define CAT_ONE_CONTEXT_NODE 7
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#define CAT_THREEFOUR_CONTEXT_NODE 8
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#define CAT_THREE_CONTEXT_NODE 9
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#define CAT_FIVE_CONTEXT_NODE 10
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#define CAT1_MIN_VAL 5
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#define CAT2_MIN_VAL 7
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#define CAT3_MIN_VAL 11
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#define CAT4_MIN_VAL 19
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#define CAT5_MIN_VAL 35
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#define CAT6_MIN_VAL 67
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#define CAT1_PROB0 159
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#define CAT2_PROB0 145
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#define CAT2_PROB1 165
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#define CAT3_PROB0 140
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#define CAT3_PROB1 148
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#define CAT3_PROB2 173
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#define CAT4_PROB0 135
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#define CAT4_PROB1 140
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#define CAT4_PROB2 155
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#define CAT4_PROB3 176
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#define CAT5_PROB0 130
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#define CAT5_PROB1 134
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#define CAT5_PROB2 141
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#define CAT5_PROB3 157
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#define CAT5_PROB4 180
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static const vp9_prob cat6_prob[15] = {
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254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0
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};
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DECLARE_ALIGNED(16, extern const uint8_t, vp9_norm[256]);
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#define INCREMENT_COUNT(token) \
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do { \
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coef_counts[type][ref][get_coef_band(scan, txfm_size, c)] \
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[pt][token]++; \
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token_cache[c] = token; \
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pt = vp9_get_coef_context(scan, nb, pad, token_cache, \
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c + 1, default_eob); \
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} while (0)
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#if CONFIG_CODE_NONZEROCOUNT
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#define WRITE_COEF_CONTINUE(val, token) \
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{ \
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qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(br, val); \
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INCREMENT_COUNT(token); \
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c++; \
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nzc++; \
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continue; \
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}
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#else
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#define WRITE_COEF_CONTINUE(val, token) \
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{ \
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qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(br, val); \
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INCREMENT_COUNT(token); \
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c++; \
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continue; \
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}
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#endif // CONFIG_CODE_NONZEROCOUNT
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#define ADJUST_COEF(prob, bits_count) \
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do { \
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if (vp9_read(br, prob)) \
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val += 1 << bits_count; \
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} while (0);
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static int decode_coefs(VP9D_COMP *dx, const MACROBLOCKD *xd,
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BOOL_DECODER* const br, int block_idx,
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PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr,
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TX_SIZE txfm_size) {
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ENTROPY_CONTEXT* const A0 = (ENTROPY_CONTEXT *) xd->above_context;
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ENTROPY_CONTEXT* const L0 = (ENTROPY_CONTEXT *) xd->left_context;
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int aidx, lidx;
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ENTROPY_CONTEXT above_ec, left_ec;
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FRAME_CONTEXT *const fc = &dx->common.fc;
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int pt, c = 0, pad, default_eob;
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vp9_coeff_probs *coef_probs;
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vp9_prob *prob;
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vp9_coeff_count *coef_counts;
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const int ref = xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME;
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#if CONFIG_CODE_NONZEROCOUNT
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const int nzc_used = get_nzc_used(txfm_size);
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uint16_t nzc = 0;
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uint16_t nzc_expected =
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nzc_used ? xd->mode_info_context->mbmi.nzcs[block_idx] : 0;
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#endif
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const int *scan, *nb;
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uint8_t token_cache[1024];
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if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB64X64) {
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aidx = vp9_block2above_sb64[txfm_size][block_idx];
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lidx = vp9_block2left_sb64[txfm_size][block_idx];
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#if CONFIG_SBSEGMENT
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} else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB64X32) {
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aidx = vp9_block2above_sb64x32[txfm_size][block_idx];
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lidx = vp9_block2left_sb64x32[txfm_size][block_idx];
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} else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X64) {
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aidx = vp9_block2above_sb32x64[txfm_size][block_idx];
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lidx = vp9_block2left_sb32x64[txfm_size][block_idx];
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#endif
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} else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X32) {
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aidx = vp9_block2above_sb[txfm_size][block_idx];
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lidx = vp9_block2left_sb[txfm_size][block_idx];
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#if CONFIG_SBSEGMENT
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} else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X16) {
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aidx = vp9_block2above_sb32x16[txfm_size][block_idx];
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lidx = vp9_block2left_sb32x16[txfm_size][block_idx];
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} else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB16X32) {
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aidx = vp9_block2above_sb16x32[txfm_size][block_idx];
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lidx = vp9_block2left_sb16x32[txfm_size][block_idx];
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#endif
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} else {
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aidx = vp9_block2above[txfm_size][block_idx];
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lidx = vp9_block2left[txfm_size][block_idx];
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}
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switch (txfm_size) {
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default:
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case TX_4X4: {
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const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
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get_tx_type_4x4(xd, block_idx) : DCT_DCT;
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switch (tx_type) {
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default:
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scan = vp9_default_zig_zag1d_4x4;
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break;
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case ADST_DCT:
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scan = vp9_row_scan_4x4;
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break;
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case DCT_ADST:
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scan = vp9_col_scan_4x4;
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break;
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}
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above_ec = A0[aidx] != 0;
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left_ec = L0[lidx] != 0;
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coef_probs = fc->coef_probs_4x4;
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coef_counts = fc->coef_counts_4x4;
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default_eob = 16;
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break;
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}
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case TX_8X8: {
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const BLOCK_SIZE_TYPE sb_type = xd->mode_info_context->mbmi.sb_type;
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const int sz = 3 + mb_width_log2(sb_type);
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const int x = block_idx & ((1 << sz) - 1);
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const int y = block_idx - x;
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const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
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get_tx_type_8x8(xd, y + (x >> 1)) : DCT_DCT;
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switch (tx_type) {
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default:
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scan = vp9_default_zig_zag1d_8x8;
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break;
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case ADST_DCT:
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scan = vp9_row_scan_8x8;
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break;
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case DCT_ADST:
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scan = vp9_col_scan_8x8;
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break;
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}
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coef_probs = fc->coef_probs_8x8;
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coef_counts = fc->coef_counts_8x8;
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above_ec = (A0[aidx] + A0[aidx + 1]) != 0;
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left_ec = (L0[lidx] + L0[lidx + 1]) != 0;
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default_eob = 64;
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break;
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}
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case TX_16X16: {
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const BLOCK_SIZE_TYPE sb_type = xd->mode_info_context->mbmi.sb_type;
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const int sz = 4 + mb_width_log2(sb_type);
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const int x = block_idx & ((1 << sz) - 1);
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const int y = block_idx - x;
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const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
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get_tx_type_16x16(xd, y + (x >> 2)) : DCT_DCT;
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switch (tx_type) {
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default:
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scan = vp9_default_zig_zag1d_16x16;
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break;
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case ADST_DCT:
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scan = vp9_row_scan_16x16;
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break;
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case DCT_ADST:
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scan = vp9_col_scan_16x16;
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break;
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}
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coef_probs = fc->coef_probs_16x16;
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coef_counts = fc->coef_counts_16x16;
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if (type == PLANE_TYPE_UV) {
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ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
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ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
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above_ec = (A0[aidx] + A0[aidx + 1] + A1[aidx] + A1[aidx + 1]) != 0;
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left_ec = (L0[lidx] + L0[lidx + 1] + L1[lidx] + L1[lidx + 1]) != 0;
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} else {
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above_ec = (A0[aidx] + A0[aidx + 1] + A0[aidx + 2] + A0[aidx + 3]) != 0;
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left_ec = (L0[lidx] + L0[lidx + 1] + L0[lidx + 2] + L0[lidx + 3]) != 0;
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}
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default_eob = 256;
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break;
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}
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case TX_32X32:
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scan = vp9_default_zig_zag1d_32x32;
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coef_probs = fc->coef_probs_32x32;
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coef_counts = fc->coef_counts_32x32;
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if (type == PLANE_TYPE_UV) {
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ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
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ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
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ENTROPY_CONTEXT *A2 = (ENTROPY_CONTEXT *) (xd->above_context + 2);
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ENTROPY_CONTEXT *L2 = (ENTROPY_CONTEXT *) (xd->left_context + 2);
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ENTROPY_CONTEXT *A3 = (ENTROPY_CONTEXT *) (xd->above_context + 3);
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ENTROPY_CONTEXT *L3 = (ENTROPY_CONTEXT *) (xd->left_context + 3);
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above_ec = (A0[aidx] + A0[aidx + 1] + A1[aidx] + A1[aidx + 1] +
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A2[aidx] + A2[aidx + 1] + A3[aidx] + A3[aidx + 1]) != 0;
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left_ec = (L0[lidx] + L0[lidx + 1] + L1[lidx] + L1[lidx + 1] +
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L2[lidx] + L2[lidx + 1] + L3[lidx] + L3[lidx + 1]) != 0;
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} else {
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ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
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ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
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above_ec = (A0[aidx] + A0[aidx + 1] + A0[aidx + 2] + A0[aidx + 3] +
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A1[aidx] + A1[aidx + 1] + A1[aidx + 2] + A1[aidx + 3]) != 0;
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left_ec = (L0[lidx] + L0[lidx + 1] + L0[lidx + 2] + L0[lidx + 3] +
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L1[lidx] + L1[lidx + 1] + L1[lidx + 2] + L1[lidx + 3]) != 0;
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}
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default_eob = 1024;
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break;
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}
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pt = combine_entropy_contexts(above_ec, left_ec);
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nb = vp9_get_coef_neighbors_handle(scan, &pad);
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while (1) {
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int val;
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const uint8_t *cat6 = cat6_prob;
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if (c >= seg_eob)
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break;
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#if CONFIG_CODE_NONZEROCOUNT
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if (nzc_used && nzc == nzc_expected)
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break;
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#endif
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prob = coef_probs[type][ref][get_coef_band(scan, txfm_size, c)][pt];
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fc->eob_branch_counts[txfm_size][type][ref]
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[get_coef_band(scan, txfm_size, c)][pt]++;
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#if CONFIG_CODE_NONZEROCOUNT
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if (!nzc_used)
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#endif
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if (!vp9_read(br, prob[EOB_CONTEXT_NODE]))
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break;
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SKIP_START:
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if (c >= seg_eob)
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break;
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#if CONFIG_CODE_NONZEROCOUNT
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if (nzc_used && nzc == nzc_expected)
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break;
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// decode zero node only if there are zeros left
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if (!nzc_used || seg_eob - nzc_expected - c + nzc > 0)
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#endif
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if (!vp9_read(br, prob[ZERO_CONTEXT_NODE])) {
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INCREMENT_COUNT(ZERO_TOKEN);
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++c;
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prob = coef_probs[type][ref][get_coef_band(scan, txfm_size, c)][pt];
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goto SKIP_START;
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}
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// ONE_CONTEXT_NODE_0_
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if (!vp9_read(br, prob[ONE_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(1, ONE_TOKEN);
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}
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// LOW_VAL_CONTEXT_NODE_0_
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if (!vp9_read(br, prob[LOW_VAL_CONTEXT_NODE])) {
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if (!vp9_read(br, prob[TWO_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(2, TWO_TOKEN);
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}
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if (!vp9_read(br, prob[THREE_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(3, THREE_TOKEN);
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}
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WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
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}
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// HIGH_LOW_CONTEXT_NODE_0_
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if (!vp9_read(br, prob[HIGH_LOW_CONTEXT_NODE])) {
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if (!vp9_read(br, prob[CAT_ONE_CONTEXT_NODE])) {
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val = CAT1_MIN_VAL;
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ADJUST_COEF(CAT1_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
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}
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val = CAT2_MIN_VAL;
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ADJUST_COEF(CAT2_PROB1, 1);
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ADJUST_COEF(CAT2_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
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}
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// CAT_THREEFOUR_CONTEXT_NODE_0_
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if (!vp9_read(br, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
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if (!vp9_read(br, prob[CAT_THREE_CONTEXT_NODE])) {
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val = CAT3_MIN_VAL;
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ADJUST_COEF(CAT3_PROB2, 2);
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ADJUST_COEF(CAT3_PROB1, 1);
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ADJUST_COEF(CAT3_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3);
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}
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val = CAT4_MIN_VAL;
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ADJUST_COEF(CAT4_PROB3, 3);
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ADJUST_COEF(CAT4_PROB2, 2);
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ADJUST_COEF(CAT4_PROB1, 1);
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ADJUST_COEF(CAT4_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4);
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}
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// CAT_FIVE_CONTEXT_NODE_0_:
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if (!vp9_read(br, prob[CAT_FIVE_CONTEXT_NODE])) {
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val = CAT5_MIN_VAL;
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ADJUST_COEF(CAT5_PROB4, 4);
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ADJUST_COEF(CAT5_PROB3, 3);
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ADJUST_COEF(CAT5_PROB2, 2);
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ADJUST_COEF(CAT5_PROB1, 1);
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ADJUST_COEF(CAT5_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5);
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}
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val = 0;
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while (*cat6) {
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val = (val << 1) | vp9_read(br, *cat6++);
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}
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val += CAT6_MIN_VAL;
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
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}
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#if CONFIG_CODE_NONZEROCOUNT
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if (!nzc_used)
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#endif
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if (c < seg_eob)
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coef_counts[type][ref][get_coef_band(scan, txfm_size, c)]
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[pt][DCT_EOB_TOKEN]++;
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#if CONFIG_CODE_NONZEROCOUNT
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if (!nzc_used)
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xd->mode_info_context->mbmi.nzcs[block_idx] = nzc;
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else
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assert(nzc == nzc_expected);
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#endif
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A0[aidx] = L0[lidx] = c > 0;
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if (txfm_size >= TX_8X8) {
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A0[aidx + 1] = L0[lidx + 1] = A0[aidx];
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if (txfm_size >= TX_16X16) {
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if (type == PLANE_TYPE_UV) {
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ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
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ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
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A1[aidx] = A1[aidx + 1] = L1[lidx] = L1[lidx + 1] = A0[aidx];
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if (txfm_size >= TX_32X32) {
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ENTROPY_CONTEXT *A2 = (ENTROPY_CONTEXT *) (xd->above_context + 2);
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ENTROPY_CONTEXT *L2 = (ENTROPY_CONTEXT *) (xd->left_context + 2);
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ENTROPY_CONTEXT *A3 = (ENTROPY_CONTEXT *) (xd->above_context + 3);
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ENTROPY_CONTEXT *L3 = (ENTROPY_CONTEXT *) (xd->left_context + 3);
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A2[aidx] = A2[aidx + 1] = A3[aidx] = A3[aidx + 1] = A0[aidx];
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L2[lidx] = L2[lidx + 1] = L3[lidx] = L3[lidx + 1] = A0[aidx];
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}
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} else {
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A0[aidx + 2] = A0[aidx + 3] = L0[lidx + 2] = L0[lidx + 3] = A0[aidx];
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if (txfm_size >= TX_32X32) {
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ENTROPY_CONTEXT *A1 = (ENTROPY_CONTEXT *) (xd->above_context + 1);
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ENTROPY_CONTEXT *L1 = (ENTROPY_CONTEXT *) (xd->left_context + 1);
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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;
|
|
}
|
|
|
|
|
|
struct decode_block_args {
|
|
VP9D_COMP *pbi;
|
|
MACROBLOCKD *xd;
|
|
BOOL_DECODER *bc;
|
|
int *eobtotal;
|
|
};
|
|
static void decode_block(int plane, int block,
|
|
BLOCK_SIZE_TYPE bsize,
|
|
int ss_txfrm_size,
|
|
void *argv) {
|
|
const struct decode_block_args* const arg = argv;
|
|
const int bw = b_width_log2(bsize), bh = b_height_log2(bsize);
|
|
const int old_block_idx = old_block_idx_4x4(arg->xd, bw + bh,
|
|
plane, block);
|
|
|
|
// find the maximum eob for this transform size, adjusted by segment
|
|
const int segment_id = arg->xd->mode_info_context->mbmi.segment_id;
|
|
const TX_SIZE ss_tx_size = ss_txfrm_size / 2;
|
|
const int seg_eob = get_eob(arg->xd, segment_id, 16 << ss_txfrm_size);
|
|
int16_t* const qcoeff_base = arg->xd->plane[plane].qcoeff;
|
|
|
|
const int eob = decode_coefs(arg->pbi, arg->xd, arg->bc, old_block_idx,
|
|
arg->xd->plane[plane].plane_type, seg_eob,
|
|
BLOCK_OFFSET(qcoeff_base, block, 16),
|
|
ss_tx_size);
|
|
|
|
arg->xd->plane[plane].eobs[block] = eob;
|
|
arg->eobtotal[0] += eob;
|
|
}
|
|
|
|
int vp9_decode_tokens(VP9D_COMP* const pbi,
|
|
MACROBLOCKD* const xd,
|
|
BOOL_DECODER* const bc,
|
|
BLOCK_SIZE_TYPE bsize) {
|
|
int eobtotal = 0;
|
|
struct decode_block_args args = {pbi, xd, bc, &eobtotal};
|
|
foreach_transformed_block(xd, bsize, decode_block, &args);
|
|
return eobtotal;
|
|
}
|
|
|
|
#if CONFIG_NEWBINTRAMODES
|
|
static int decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
|
|
BOOL_DECODER* const bc,
|
|
PLANE_TYPE type, int i, int seg_eob) {
|
|
const struct plane_block_idx pb_idx = plane_block_idx(16, i);
|
|
const int c = decode_coefs(dx, xd, bc, i, type, seg_eob,
|
|
BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff, pb_idx.block, 16), TX_4X4);
|
|
xd->plane[pb_idx.plane].eobs[pb_idx.block] = c;
|
|
return c;
|
|
}
|
|
|
|
static int decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
|
|
MACROBLOCKD* const xd,
|
|
BOOL_DECODER* const bc,
|
|
int seg_eob) {
|
|
int i, eobtotal = 0;
|
|
|
|
// chroma blocks
|
|
for (i = 16; i < 24; i++)
|
|
eobtotal += decode_coefs_4x4(dx, xd, bc, PLANE_TYPE_UV, i, seg_eob);
|
|
|
|
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);
|
|
}
|
|
|
|
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(dx, xd, bc, type, i, seg_eob);
|
|
}
|
|
#endif
|