/* * 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 "vpx_mem/vpx_mem.h" #include "vpx_ports/mem.h" #include "vp9/common/vp9_blockd.h" #include "vp9/common/vp9_common.h" #include "vp9/common/vp9_seg_common.h" #include "vp9/decoder/vp9_dboolhuff.h" #include "vp9/decoder/vp9_detokenize.h" #include "vp9/decoder/vp9_onyxd_int.h" #include "vp9/decoder/vp9_treereader.h" #define EOB_CONTEXT_NODE 0 #define ZERO_CONTEXT_NODE 1 #define ONE_CONTEXT_NODE 2 #define LOW_VAL_CONTEXT_NODE 0 #define TWO_CONTEXT_NODE 1 #define THREE_CONTEXT_NODE 2 #define HIGH_LOW_CONTEXT_NODE 3 #define CAT_ONE_CONTEXT_NODE 4 #define CAT_THREEFOUR_CONTEXT_NODE 5 #define CAT_THREE_CONTEXT_NODE 6 #define CAT_FIVE_CONTEXT_NODE 7 #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 }; static const int token_to_counttoken[MAX_ENTROPY_TOKENS] = { ZERO_TOKEN, ONE_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, DCT_EOB_MODEL_TOKEN }; #define INCREMENT_COUNT(token) \ do { \ if (!cm->frame_parallel_decoding_mode) \ ++coef_counts[band][pt][token_to_counttoken[token]]; \ } while (0) #define WRITE_COEF_CONTINUE(val, token) \ { \ v = (val * dqv) >> dq_shift; \ dqcoeff_ptr[scan[c]] = (vp9_read_bit(r) ? -v : v); \ INCREMENT_COUNT(token); \ token_cache[scan[c]] = vp9_pt_energy_class[token]; \ ++c; \ dqv = dq[1]; \ continue; \ } #define ADJUST_COEF(prob, bits_count) \ do { \ val += (vp9_read(r, prob) << bits_count); \ } while (0) static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd, vp9_reader *r, int block_idx, PLANE_TYPE type, int seg_eob, int16_t *dqcoeff_ptr, TX_SIZE tx_size, const int16_t *dq, int pt, uint8_t *token_cache) { const FRAME_CONTEXT *const fc = &cm->fc; FRAME_COUNTS *const counts = &cm->counts; const int ref = is_inter_block(&xd->mi_8x8[0]->mbmi); int band, c = 0; const vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] = fc->coef_probs[tx_size][type][ref]; const vp9_prob *prob; unsigned int (*coef_counts)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES + 1] = counts->coef[tx_size][type][ref]; unsigned int (*eob_branch_count)[PREV_COEF_CONTEXTS] = counts->eob_branch[tx_size][type][ref]; const int16_t *scan, *nb; const uint8_t *cat6; const uint8_t *band_translate = get_band_translate(tx_size); const int dq_shift = (tx_size == TX_32X32); const MODE_INFO *const mi = xd->mi_8x8[0]; const MB_MODE_INFO *const mbmi = &mi->mbmi; scan_order const *so; int v; int16_t dqv = dq[0]; if (mbmi->ref_frame[0] > 0 || type != PLANE_TYPE_Y_WITH_DC || xd->lossless) { so = &inter_scan_orders[tx_size]; } else { MB_PREDICTION_MODE mode = mbmi->mode; if (mbmi->sb_type < BLOCK_8X8) mode = mi->bmi[block_idx].as_mode; so = &intra_scan_orders[tx_size][mode]; } scan = so->scan; nb = so->neighbors; while (c < seg_eob) { int val; if (c) pt = get_coef_context(nb, token_cache, c); band = *band_translate++; prob = coef_probs[band][pt]; if (!cm->frame_parallel_decoding_mode) ++eob_branch_count[band][pt]; if (!vp9_read(r, prob[EOB_CONTEXT_NODE])) break; goto DECODE_ZERO; SKIP_START: if (c >= seg_eob) break; if (c) pt = get_coef_context(nb, token_cache, c); band = *band_translate++; prob = coef_probs[band][pt]; DECODE_ZERO: if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) { INCREMENT_COUNT(ZERO_TOKEN); token_cache[scan[c]] = vp9_pt_energy_class[ZERO_TOKEN]; dqv = dq[1]; \ ++c; goto SKIP_START; } // ONE_CONTEXT_NODE_0_ if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) { WRITE_COEF_CONTINUE(1, ONE_TOKEN); } prob = vp9_pareto8_full[coef_probs[band][pt][PIVOT_NODE]-1]; // LOW_VAL_CONTEXT_NODE_0_ if (!vp9_read(r, prob[LOW_VAL_CONTEXT_NODE])) { if (!vp9_read(r, prob[TWO_CONTEXT_NODE])) { WRITE_COEF_CONTINUE(2, TWO_TOKEN); } if (!vp9_read(r, prob[THREE_CONTEXT_NODE])) { WRITE_COEF_CONTINUE(3, THREE_TOKEN); } WRITE_COEF_CONTINUE(4, FOUR_TOKEN); } // HIGH_LOW_CONTEXT_NODE_0_ if (!vp9_read(r, prob[HIGH_LOW_CONTEXT_NODE])) { if (!vp9_read(r, 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(r, prob[CAT_THREEFOUR_CONTEXT_NODE])) { if (!vp9_read(r, 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(r, 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; cat6 = cat6_prob; while (*cat6) val = (val << 1) | vp9_read(r, *cat6++); val += CAT6_MIN_VAL; WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6); } if (c < seg_eob) { if (!cm->frame_parallel_decoding_mode) ++coef_counts[band][pt][DCT_EOB_MODEL_TOKEN]; } return c; } int vp9_decode_block_tokens(VP9_COMMON *cm, MACROBLOCKD *xd, int plane, int block, BLOCK_SIZE plane_bsize, int x, int y, TX_SIZE tx_size, vp9_reader *r, uint8_t *token_cache) { struct macroblockd_plane *const pd = &xd->plane[plane]; const int seg_eob = get_tx_eob(&cm->seg, xd->mi_8x8[0]->mbmi.segment_id, tx_size); const int pt = get_entropy_context(tx_size, pd->above_context + x, pd->left_context + y); const int eob = decode_coefs(cm, xd, r, block, pd->plane_type, seg_eob, BLOCK_OFFSET(pd->dqcoeff, block), tx_size, pd->dequant, pt, token_cache); set_contexts(xd, pd, plane_bsize, tx_size, eob > 0, x, y); pd->eobs[block] = eob; return eob; }