diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/decoder/vp9_detokenize.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/media/libvpx/vp9/decoder/vp9_detokenize.c Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,236 @@ +/* + * 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 +}; + +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) \ + { \ + dqcoeff_ptr[scan[c]] = (vp9_read_bit(r) ? -val : val) * \ + dq[c > 0] / (1 + (tx_size == TX_32X32)); \ + INCREMENT_COUNT(token); \ + token_cache[scan[c]] = vp9_pt_energy_class[token]; \ + ++c; \ + 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]; + vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES]; + uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } }; + 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); + get_scan(xd, tx_size, type, block_idx, &scan, &nb); + + 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]; + ++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; + 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; +} + +