/* * 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 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_pt_energy_class[MAX_ENTROPY_TOKENS]); #define INCREMENT_COUNT(token) \ do { \ coef_counts[type][ref][band][pt] \ [token >= TWO_TOKEN ? \ (token == DCT_EOB_TOKEN ? DCT_EOB_MODEL_TOKEN : TWO_TOKEN) : \ token]++; \ token_cache[scan[c]] = vp9_pt_energy_class[token]; \ } while (0) #define WRITE_COEF_CONTINUE(val, token) \ { \ qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(r, val) * \ dq[c > 0] / (1 + (tx_size == TX_32X32)); \ INCREMENT_COUNT(token); \ c++; \ continue; \ } #define ADJUST_COEF(prob, bits_count) \ do { \ if (vp9_read(r, prob)) \ val += 1 << 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 *qcoeff_ptr, TX_SIZE tx_size, const int16_t *dq, ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L) { FRAME_CONTEXT *const fc = &cm->fc; FRAME_COUNTS *const counts = &cm->counts; const int ref = is_inter_block(&xd->this_mi->mbmi); int band, c = 0; vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] = fc->coef_probs[tx_size][type][ref]; vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES]; uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } }; vp9_prob *prob; vp9_coeff_count_model *coef_counts = counts->coef[tx_size]; const int16_t *scan, *nb; const uint8_t *band_translate; uint8_t token_cache[1024]; int pt = get_entropy_context(tx_size, A, L); get_scan_and_band(xd, tx_size, type, block_idx, &scan, &band_translate); nb = vp9_get_coef_neighbors_handle(scan); while (1) { int val; const uint8_t *cat6 = cat6_prob; if (c >= seg_eob) break; if (c) pt = get_coef_context(nb, token_cache, c); band = get_coef_band(band_translate, c); prob = coef_probs[band][pt]; counts->eob_branch[tx_size][type][ref][band][pt]++; if (!vp9_read(r, prob[EOB_CONTEXT_NODE])) break; SKIP_START: if (c >= seg_eob) break; if (c) pt = get_coef_context(nb, token_cache, c); band = get_coef_band(band_translate, c); prob = coef_probs[band][pt]; if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) { INCREMENT_COUNT(ZERO_TOKEN); ++c; goto SKIP_START; } // ONE_CONTEXT_NODE_0_ if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) { WRITE_COEF_CONTINUE(1, ONE_TOKEN); } // Load full probabilities if not already loaded if (!load_map[band][pt]) { vp9_model_to_full_probs(coef_probs[band][pt], coef_probs_full[band][pt]); load_map[band][pt] = 1; } prob = coef_probs_full[band][pt]; // 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; while (*cat6) { val = (val << 1) | vp9_read(r, *cat6++); } val += CAT6_MIN_VAL; WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6); } if (c < seg_eob) coef_counts[type][ref][band][pt][DCT_EOB_MODEL_TOKEN]++; return c; } struct decode_block_args { VP9D_COMP *pbi; vp9_reader *r; int *eobtotal; }; static void decode_block(int plane, int block, BLOCK_SIZE plane_bsize, TX_SIZE tx_size, void *argv) { const struct decode_block_args* const arg = argv; // find the maximum eob for this transform size, adjusted by segment MACROBLOCKD *xd = &arg->pbi->mb; struct segmentation *seg = &arg->pbi->common.seg; struct macroblockd_plane* pd = &xd->plane[plane]; const int segment_id = xd->this_mi->mbmi.segment_id; const int seg_eob = get_tx_eob(seg, segment_id, tx_size); int aoff, loff, eob; txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff); eob = decode_coefs(&arg->pbi->common, xd, arg->r, block, pd->plane_type, seg_eob, BLOCK_OFFSET(pd->qcoeff, block), tx_size, pd->dequant, pd->above_context + aoff, pd->left_context + loff); set_contexts(xd, pd, plane_bsize, tx_size, eob > 0, aoff, loff); pd->eobs[block] = eob; *arg->eobtotal += eob; } int vp9_decode_tokens(VP9D_COMP *pbi, vp9_reader *r, BLOCK_SIZE bsize) { int eobtotal = 0; struct decode_block_args args = {pbi, r, &eobtotal}; foreach_transformed_block(&pbi->mb, bsize, decode_block, &args); return eobtotal; }