| /* |
| * 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_detokenize.h" |
| #include "vp9/decoder/vp9_onyxd_int.h" |
| |
| #if CONFIG_BALANCED_COEFTREE |
| #define ZERO_CONTEXT_NODE 0 |
| #define EOB_CONTEXT_NODE 1 |
| #else |
| #define EOB_CONTEXT_NODE 0 |
| #define ZERO_CONTEXT_NODE 1 |
| #endif |
| |
| #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 + (txfm_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(FRAME_CONTEXT *fc, const MACROBLOCKD *xd, |
| vp9_reader *r, int block_idx, |
| PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr, |
| TX_SIZE txfm_size, const int16_t *dq, |
| ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L) { |
| ENTROPY_CONTEXT above_ec, left_ec; |
| int pt, c = 0; |
| int band; |
| vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES]; |
| vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES]; |
| uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { |
| {0, 0, 0, 0, 0, 0}, |
| {0, 0, 0, 0, 0, 0}, |
| {0, 0, 0, 0, 0, 0}, |
| {0, 0, 0, 0, 0, 0}, |
| {0, 0, 0, 0, 0, 0}, |
| {0, 0, 0, 0, 0, 0}, |
| }; |
| |
| vp9_prob *prob; |
| vp9_coeff_count_model *coef_counts; |
| const int ref = xd->mode_info_context->mbmi.ref_frame[0] != INTRA_FRAME; |
| const int16_t *scan, *nb; |
| uint8_t token_cache[1024]; |
| const uint8_t * band_translate; |
| #if CONFIG_BALANCED_COEFTREE |
| int skip_eob_node = 0; |
| #endif |
| |
| coef_probs = fc->coef_probs[txfm_size][type][ref]; |
| coef_counts = fc->coef_counts[txfm_size]; |
| switch (txfm_size) { |
| default: |
| case TX_4X4: { |
| const TX_TYPE tx_type = type == PLANE_TYPE_Y_WITH_DC ? |
| get_tx_type_4x4(xd, block_idx) : DCT_DCT; |
| scan = get_scan_4x4(tx_type); |
| above_ec = A[0] != 0; |
| left_ec = L[0] != 0; |
| band_translate = vp9_coefband_trans_4x4; |
| break; |
| } |
| case TX_8X8: { |
| const TX_TYPE tx_type = type == PLANE_TYPE_Y_WITH_DC ? |
| get_tx_type_8x8(xd) : DCT_DCT; |
| scan = get_scan_8x8(tx_type); |
| above_ec = (A[0] + A[1]) != 0; |
| left_ec = (L[0] + L[1]) != 0; |
| band_translate = vp9_coefband_trans_8x8plus; |
| break; |
| } |
| case TX_16X16: { |
| const TX_TYPE tx_type = type == PLANE_TYPE_Y_WITH_DC ? |
| get_tx_type_16x16(xd) : DCT_DCT; |
| scan = get_scan_16x16(tx_type); |
| above_ec = (A[0] + A[1] + A[2] + A[3]) != 0; |
| left_ec = (L[0] + L[1] + L[2] + L[3]) != 0; |
| band_translate = vp9_coefband_trans_8x8plus; |
| break; |
| } |
| case TX_32X32: |
| scan = vp9_default_scan_32x32; |
| above_ec = (A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7]) != 0; |
| left_ec = (L[0] + L[1] + L[2] + L[3] + L[4] + L[5] + L[6] + L[7]) != 0; |
| band_translate = vp9_coefband_trans_8x8plus; |
| break; |
| } |
| |
| pt = combine_entropy_contexts(above_ec, left_ec); |
| 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]; |
| #if !CONFIG_BALANCED_COEFTREE |
| fc->eob_branch_counts[txfm_size][type][ref][band][pt]++; |
| if (!vp9_read(r, prob[EOB_CONTEXT_NODE])) |
| break; |
| |
| SKIP_START: |
| #endif |
| 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; |
| #if CONFIG_BALANCED_COEFTREE |
| skip_eob_node = 1; |
| continue; |
| #else |
| goto SKIP_START; |
| #endif |
| } |
| #if CONFIG_BALANCED_COEFTREE |
| if (!skip_eob_node) { |
| fc->eob_branch_counts[txfm_size][type][ref][band][pt]++; |
| if (!vp9_read(r, prob[EOB_CONTEXT_NODE])) |
| break; |
| } |
| skip_eob_node = 0; |
| #endif |
| |
| // 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; |
| } |
| |
| static int get_eob(MACROBLOCKD* const xd, int segment_id, int eob_max) { |
| return vp9_segfeature_active(xd, segment_id, SEG_LVL_SKIP) ? 0 : eob_max; |
| } |
| |
| struct decode_block_args { |
| VP9D_COMP *pbi; |
| vp9_reader *r; |
| 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); |
| |
| // find the maximum eob for this transform size, adjusted by segment |
| MACROBLOCKD *xd = &arg->pbi->mb; |
| struct macroblockd_plane* pd = &xd->plane[plane]; |
| const int segment_id = xd->mode_info_context->mbmi.segment_id; |
| const TX_SIZE ss_tx_size = ss_txfrm_size / 2; |
| const int seg_eob = get_eob(xd, segment_id, 16 << ss_txfrm_size); |
| const int off = block >> ss_txfrm_size; |
| const int mod = bw - ss_tx_size - pd->subsampling_x; |
| const int aoff = (off & ((1 << mod) - 1)) << ss_tx_size; |
| const int loff = (off >> mod) << ss_tx_size; |
| |
| ENTROPY_CONTEXT *A = pd->above_context + aoff; |
| ENTROPY_CONTEXT *L = pd->left_context + loff; |
| const int eob = decode_coefs(&arg->pbi->common.fc, xd, arg->r, block, |
| pd->plane_type, seg_eob, |
| BLOCK_OFFSET(pd->qcoeff, block, 16), |
| ss_tx_size, pd->dequant, A, L); |
| |
| if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) { |
| set_contexts_on_border(xd, bsize, plane, ss_tx_size, eob, aoff, loff, A, L); |
| } else { |
| int pt; |
| for (pt = 0; pt < (1 << ss_tx_size); pt++) |
| A[pt] = L[pt] = eob > 0; |
| } |
| pd->eobs[block] = eob; |
| *arg->eobtotal += eob; |
| } |
| |
| int vp9_decode_tokens(VP9D_COMP *pbi, vp9_reader *r, BLOCK_SIZE_TYPE bsize) { |
| int eobtotal = 0; |
| struct decode_block_args args = {pbi, r, &eobtotal}; |
| foreach_transformed_block(&pbi->mb, bsize, decode_block, &args); |
| return eobtotal; |
| } |
