diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/encoder/vp9_bitstream.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/media/libvpx/vp9/encoder/vp9_bitstream.c Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,1523 @@ +/* + * 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 +#include +#include + +#include "vpx/vpx_encoder.h" +#include "vpx_mem/vpx_mem.h" + +#include "vp9/common/vp9_entropymode.h" +#include "vp9/common/vp9_entropymv.h" +#include "vp9/common/vp9_findnearmv.h" +#include "vp9/common/vp9_tile_common.h" +#include "vp9/common/vp9_seg_common.h" +#include "vp9/common/vp9_pred_common.h" +#include "vp9/common/vp9_entropy.h" +#include "vp9/common/vp9_mvref_common.h" +#include "vp9/common/vp9_treecoder.h" +#include "vp9/common/vp9_systemdependent.h" +#include "vp9/common/vp9_pragmas.h" + +#include "vp9/encoder/vp9_mcomp.h" +#include "vp9/encoder/vp9_encodemv.h" +#include "vp9/encoder/vp9_bitstream.h" +#include "vp9/encoder/vp9_segmentation.h" +#include "vp9/encoder/vp9_subexp.h" +#include "vp9/encoder/vp9_write_bit_buffer.h" + + +#if defined(SECTIONBITS_OUTPUT) +unsigned __int64 Sectionbits[500]; +#endif + +#ifdef ENTROPY_STATS +int intra_mode_stats[INTRA_MODES] + [INTRA_MODES] + [INTRA_MODES]; +vp9_coeff_stats tree_update_hist[TX_SIZES][BLOCK_TYPES]; + +extern unsigned int active_section; +#endif + + +#ifdef MODE_STATS +int64_t tx_count_32x32p_stats[TX_SIZE_CONTEXTS][TX_SIZES]; +int64_t tx_count_16x16p_stats[TX_SIZE_CONTEXTS][TX_SIZES - 1]; +int64_t tx_count_8x8p_stats[TX_SIZE_CONTEXTS][TX_SIZES - 2]; +int64_t switchable_interp_stats[SWITCHABLE_FILTER_CONTEXTS][SWITCHABLE_FILTERS]; + +void init_tx_count_stats() { + vp9_zero(tx_count_32x32p_stats); + vp9_zero(tx_count_16x16p_stats); + vp9_zero(tx_count_8x8p_stats); +} + +void init_switchable_interp_stats() { + vp9_zero(switchable_interp_stats); +} + +static void update_tx_count_stats(VP9_COMMON *cm) { + int i, j; + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + for (j = 0; j < TX_SIZES; j++) { + tx_count_32x32p_stats[i][j] += cm->fc.tx_count_32x32p[i][j]; + } + } + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + for (j = 0; j < TX_SIZES - 1; j++) { + tx_count_16x16p_stats[i][j] += cm->fc.tx_count_16x16p[i][j]; + } + } + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + for (j = 0; j < TX_SIZES - 2; j++) { + tx_count_8x8p_stats[i][j] += cm->fc.tx_count_8x8p[i][j]; + } + } +} + +static void update_switchable_interp_stats(VP9_COMMON *cm) { + int i, j; + for (i = 0; i < SWITCHABLE_FILTER_CONTEXTS; ++i) + for (j = 0; j < SWITCHABLE_FILTERS; ++j) + switchable_interp_stats[i][j] += cm->fc.switchable_interp_count[i][j]; +} + +void write_tx_count_stats() { + int i, j; + FILE *fp = fopen("tx_count.bin", "wb"); + fwrite(tx_count_32x32p_stats, sizeof(tx_count_32x32p_stats), 1, fp); + fwrite(tx_count_16x16p_stats, sizeof(tx_count_16x16p_stats), 1, fp); + fwrite(tx_count_8x8p_stats, sizeof(tx_count_8x8p_stats), 1, fp); + fclose(fp); + + printf( + "vp9_default_tx_count_32x32p[TX_SIZE_CONTEXTS][TX_SIZES] = {\n"); + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + printf(" { "); + for (j = 0; j < TX_SIZES; j++) { + printf("%"PRId64", ", tx_count_32x32p_stats[i][j]); + } + printf("},\n"); + } + printf("};\n"); + printf( + "vp9_default_tx_count_16x16p[TX_SIZE_CONTEXTS][TX_SIZES-1] = {\n"); + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + printf(" { "); + for (j = 0; j < TX_SIZES - 1; j++) { + printf("%"PRId64", ", tx_count_16x16p_stats[i][j]); + } + printf("},\n"); + } + printf("};\n"); + printf( + "vp9_default_tx_count_8x8p[TX_SIZE_CONTEXTS][TX_SIZES-2] = {\n"); + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + printf(" { "); + for (j = 0; j < TX_SIZES - 2; j++) { + printf("%"PRId64", ", tx_count_8x8p_stats[i][j]); + } + printf("},\n"); + } + printf("};\n"); +} + +void write_switchable_interp_stats() { + int i, j; + FILE *fp = fopen("switchable_interp.bin", "wb"); + fwrite(switchable_interp_stats, sizeof(switchable_interp_stats), 1, fp); + fclose(fp); + + printf( + "vp9_default_switchable_filter_count[SWITCHABLE_FILTER_CONTEXTS]" + "[SWITCHABLE_FILTERS] = {\n"); + for (i = 0; i < SWITCHABLE_FILTER_CONTEXTS; i++) { + printf(" { "); + for (j = 0; j < SWITCHABLE_FILTERS; j++) { + printf("%"PRId64", ", switchable_interp_stats[i][j]); + } + printf("},\n"); + } + printf("};\n"); +} +#endif + +static INLINE void write_be32(uint8_t *p, int value) { + p[0] = value >> 24; + p[1] = value >> 16; + p[2] = value >> 8; + p[3] = value; +} + +void vp9_encode_unsigned_max(struct vp9_write_bit_buffer *wb, + int data, int max) { + vp9_wb_write_literal(wb, data, get_unsigned_bits(max)); +} + +static void update_mode(vp9_writer *w, int n, vp9_tree tree, + vp9_prob Pcur[/* n-1 */], + unsigned int bct[/* n-1 */][2], + const unsigned int num_events[/* n */]) { + int i = 0; + + vp9_tree_probs_from_distribution(tree, bct, num_events); + for (i = 0; i < n - 1; ++i) + vp9_cond_prob_diff_update(w, &Pcur[i], bct[i]); +} + +static void update_mbintra_mode_probs(VP9_COMP* const cpi, + vp9_writer* const bc) { + VP9_COMMON *const cm = &cpi->common; + int j; + unsigned int bct[INTRA_MODES - 1][2]; + + for (j = 0; j < BLOCK_SIZE_GROUPS; j++) + update_mode(bc, INTRA_MODES, vp9_intra_mode_tree, + cm->fc.y_mode_prob[j], bct, + (unsigned int *)cpi->y_mode_count[j]); +} + +static void write_selected_tx_size(const VP9_COMP *cpi, MODE_INFO *m, + TX_SIZE tx_size, BLOCK_SIZE bsize, + vp9_writer *w) { + const TX_SIZE max_tx_size = max_txsize_lookup[bsize]; + const MACROBLOCKD *const xd = &cpi->mb.e_mbd; + const vp9_prob *const tx_probs = get_tx_probs2(max_tx_size, xd, + &cpi->common.fc.tx_probs); + vp9_write(w, tx_size != TX_4X4, tx_probs[0]); + if (tx_size != TX_4X4 && max_tx_size >= TX_16X16) { + vp9_write(w, tx_size != TX_8X8, tx_probs[1]); + if (tx_size != TX_8X8 && max_tx_size >= TX_32X32) + vp9_write(w, tx_size != TX_16X16, tx_probs[2]); + } +} + +static int write_skip_coeff(const VP9_COMP *cpi, int segment_id, MODE_INFO *m, + vp9_writer *w) { + const MACROBLOCKD *const xd = &cpi->mb.e_mbd; + if (vp9_segfeature_active(&cpi->common.seg, segment_id, SEG_LVL_SKIP)) { + return 1; + } else { + const int skip_coeff = m->mbmi.skip_coeff; + vp9_write(w, skip_coeff, vp9_get_pred_prob_mbskip(&cpi->common, xd)); + return skip_coeff; + } +} + +void vp9_update_skip_probs(VP9_COMP *cpi, vp9_writer *w) { + VP9_COMMON *cm = &cpi->common; + int k; + + for (k = 0; k < MBSKIP_CONTEXTS; ++k) + vp9_cond_prob_diff_update(w, &cm->fc.mbskip_probs[k], cm->counts.mbskip[k]); +} + +static void write_intra_mode(vp9_writer *bc, int m, const vp9_prob *p) { + write_token(bc, vp9_intra_mode_tree, p, vp9_intra_mode_encodings + m); +} + +static void update_switchable_interp_probs(VP9_COMP *cpi, vp9_writer *w) { + VP9_COMMON *const cm = &cpi->common; + unsigned int branch_ct[SWITCHABLE_FILTERS - 1][2]; + int i, j; + for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j) { + vp9_tree_probs_from_distribution(vp9_switchable_interp_tree, branch_ct, + cm->counts.switchable_interp[j]); + + for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i) + vp9_cond_prob_diff_update(w, &cm->fc.switchable_interp_prob[j][i], + branch_ct[i]); + } + +#ifdef MODE_STATS + if (!cpi->dummy_packing) + update_switchable_interp_stats(cm); +#endif +} + +static void update_inter_mode_probs(VP9_COMMON *cm, vp9_writer *w) { + int i, j; + + for (i = 0; i < INTER_MODE_CONTEXTS; ++i) { + unsigned int branch_ct[INTER_MODES - 1][2]; + vp9_tree_probs_from_distribution(vp9_inter_mode_tree, branch_ct, + cm->counts.inter_mode[i]); + + for (j = 0; j < INTER_MODES - 1; ++j) + vp9_cond_prob_diff_update(w, &cm->fc.inter_mode_probs[i][j], + branch_ct[j]); + } +} + +static void pack_mb_tokens(vp9_writer* const w, + TOKENEXTRA **tp, + const TOKENEXTRA *const stop) { + TOKENEXTRA *p = *tp; + + while (p < stop && p->token != EOSB_TOKEN) { + const int t = p->token; + const struct vp9_token *const a = &vp9_coef_encodings[t]; + const vp9_extra_bit *const b = &vp9_extra_bits[t]; + int i = 0; + const vp9_prob *pp; + int v = a->value; + int n = a->len; + vp9_prob probs[ENTROPY_NODES]; + + if (t >= TWO_TOKEN) { + vp9_model_to_full_probs(p->context_tree, probs); + pp = probs; + } else { + pp = p->context_tree; + } + assert(pp != 0); + + /* skip one or two nodes */ + if (p->skip_eob_node) { + n -= p->skip_eob_node; + i = 2 * p->skip_eob_node; + } + + do { + const int bb = (v >> --n) & 1; + vp9_write(w, bb, pp[i >> 1]); + i = vp9_coef_tree[i + bb]; + } while (n); + + if (b->base_val) { + const int e = p->extra, l = b->len; + + if (l) { + const unsigned char *pb = b->prob; + int v = e >> 1; + int n = l; /* number of bits in v, assumed nonzero */ + int i = 0; + + do { + const int bb = (v >> --n) & 1; + vp9_write(w, bb, pb[i >> 1]); + i = b->tree[i + bb]; + } while (n); + } + + vp9_write_bit(w, e & 1); + } + ++p; + } + + *tp = p + (p->token == EOSB_TOKEN); +} + +static void write_sb_mv_ref(vp9_writer *w, MB_PREDICTION_MODE mode, + const vp9_prob *p) { + assert(is_inter_mode(mode)); + write_token(w, vp9_inter_mode_tree, p, + &vp9_inter_mode_encodings[INTER_OFFSET(mode)]); +} + + +static void write_segment_id(vp9_writer *w, const struct segmentation *seg, + int segment_id) { + if (seg->enabled && seg->update_map) + treed_write(w, vp9_segment_tree, seg->tree_probs, segment_id, 3); +} + +// This function encodes the reference frame +static void encode_ref_frame(VP9_COMP *cpi, vp9_writer *bc) { + VP9_COMMON *const cm = &cpi->common; + MACROBLOCK *const x = &cpi->mb; + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *mi = &xd->mi_8x8[0]->mbmi; + const int segment_id = mi->segment_id; + int seg_ref_active = vp9_segfeature_active(&cm->seg, segment_id, + SEG_LVL_REF_FRAME); + // If segment level coding of this signal is disabled... + // or the segment allows multiple reference frame options + if (!seg_ref_active) { + // does the feature use compound prediction or not + // (if not specified at the frame/segment level) + if (cm->comp_pred_mode == HYBRID_PREDICTION) { + vp9_write(bc, mi->ref_frame[1] > INTRA_FRAME, + vp9_get_pred_prob_comp_inter_inter(cm, xd)); + } else { + assert((mi->ref_frame[1] <= INTRA_FRAME) == + (cm->comp_pred_mode == SINGLE_PREDICTION_ONLY)); + } + + if (mi->ref_frame[1] > INTRA_FRAME) { + vp9_write(bc, mi->ref_frame[0] == GOLDEN_FRAME, + vp9_get_pred_prob_comp_ref_p(cm, xd)); + } else { + vp9_write(bc, mi->ref_frame[0] != LAST_FRAME, + vp9_get_pred_prob_single_ref_p1(cm, xd)); + if (mi->ref_frame[0] != LAST_FRAME) + vp9_write(bc, mi->ref_frame[0] != GOLDEN_FRAME, + vp9_get_pred_prob_single_ref_p2(cm, xd)); + } + } else { + assert(mi->ref_frame[1] <= INTRA_FRAME); + assert(vp9_get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME) == + mi->ref_frame[0]); + } + + // If using the prediction model we have nothing further to do because + // the reference frame is fully coded by the segment. +} + +static void pack_inter_mode_mvs(VP9_COMP *cpi, MODE_INFO *m, vp9_writer *bc) { + VP9_COMMON *const cm = &cpi->common; + const nmv_context *nmvc = &cm->fc.nmvc; + MACROBLOCK *const x = &cpi->mb; + MACROBLOCKD *const xd = &x->e_mbd; + struct segmentation *seg = &cm->seg; + MB_MODE_INFO *const mi = &m->mbmi; + const MV_REFERENCE_FRAME rf = mi->ref_frame[0]; + const MB_PREDICTION_MODE mode = mi->mode; + const int segment_id = mi->segment_id; + int skip_coeff; + const BLOCK_SIZE bsize = mi->sb_type; + const int allow_hp = cm->allow_high_precision_mv; + +#ifdef ENTROPY_STATS + active_section = 9; +#endif + + if (seg->update_map) { + if (seg->temporal_update) { + const int pred_flag = mi->seg_id_predicted; + vp9_prob pred_prob = vp9_get_pred_prob_seg_id(seg, xd); + vp9_write(bc, pred_flag, pred_prob); + if (!pred_flag) + write_segment_id(bc, seg, segment_id); + } else { + write_segment_id(bc, seg, segment_id); + } + } + + skip_coeff = write_skip_coeff(cpi, segment_id, m, bc); + + if (!vp9_segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME)) + vp9_write(bc, rf != INTRA_FRAME, + vp9_get_pred_prob_intra_inter(cm, xd)); + + if (bsize >= BLOCK_8X8 && cm->tx_mode == TX_MODE_SELECT && + !(rf != INTRA_FRAME && + (skip_coeff || vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP)))) { + write_selected_tx_size(cpi, m, mi->tx_size, bsize, bc); + } + + if (rf == INTRA_FRAME) { +#ifdef ENTROPY_STATS + active_section = 6; +#endif + + if (bsize >= BLOCK_8X8) { + write_intra_mode(bc, mode, cm->fc.y_mode_prob[size_group_lookup[bsize]]); + } else { + int idx, idy; + const int num_4x4_blocks_wide = num_4x4_blocks_wide_lookup[bsize]; + const int num_4x4_blocks_high = num_4x4_blocks_high_lookup[bsize]; + for (idy = 0; idy < 2; idy += num_4x4_blocks_high) { + for (idx = 0; idx < 2; idx += num_4x4_blocks_wide) { + const MB_PREDICTION_MODE bm = m->bmi[idy * 2 + idx].as_mode; + write_intra_mode(bc, bm, cm->fc.y_mode_prob[0]); + } + } + } + write_intra_mode(bc, mi->uv_mode, cm->fc.uv_mode_prob[mode]); + } else { + vp9_prob *mv_ref_p; + encode_ref_frame(cpi, bc); + mv_ref_p = cpi->common.fc.inter_mode_probs[mi->mode_context[rf]]; + +#ifdef ENTROPY_STATS + active_section = 3; +#endif + + // If segment skip is not enabled code the mode. + if (!vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP)) { + if (bsize >= BLOCK_8X8) { + write_sb_mv_ref(bc, mode, mv_ref_p); + ++cm->counts.inter_mode[mi->mode_context[rf]] + [INTER_OFFSET(mode)]; + } + } + + if (cm->mcomp_filter_type == SWITCHABLE) { + const int ctx = vp9_get_pred_context_switchable_interp(xd); + write_token(bc, vp9_switchable_interp_tree, + cm->fc.switchable_interp_prob[ctx], + &vp9_switchable_interp_encodings[mi->interp_filter]); + } else { + assert(mi->interp_filter == cm->mcomp_filter_type); + } + + if (bsize < BLOCK_8X8) { + const int num_4x4_blocks_wide = num_4x4_blocks_wide_lookup[bsize]; + const int num_4x4_blocks_high = num_4x4_blocks_high_lookup[bsize]; + int idx, idy; + for (idy = 0; idy < 2; idy += num_4x4_blocks_high) { + for (idx = 0; idx < 2; idx += num_4x4_blocks_wide) { + const int j = idy * 2 + idx; + const MB_PREDICTION_MODE blockmode = m->bmi[j].as_mode; + write_sb_mv_ref(bc, blockmode, mv_ref_p); + ++cm->counts.inter_mode[mi->mode_context[rf]] + [INTER_OFFSET(blockmode)]; + + if (blockmode == NEWMV) { +#ifdef ENTROPY_STATS + active_section = 11; +#endif + vp9_encode_mv(cpi, bc, &m->bmi[j].as_mv[0].as_mv, + &mi->best_mv[0].as_mv, nmvc, allow_hp); + + if (has_second_ref(mi)) + vp9_encode_mv(cpi, bc, &m->bmi[j].as_mv[1].as_mv, + &mi->best_mv[1].as_mv, nmvc, allow_hp); + } + } + } + } else if (mode == NEWMV) { +#ifdef ENTROPY_STATS + active_section = 5; +#endif + vp9_encode_mv(cpi, bc, &mi->mv[0].as_mv, + &mi->best_mv[0].as_mv, nmvc, allow_hp); + + if (has_second_ref(mi)) + vp9_encode_mv(cpi, bc, &mi->mv[1].as_mv, + &mi->best_mv[1].as_mv, nmvc, allow_hp); + } + } +} + +static void write_mb_modes_kf(const VP9_COMP *cpi, MODE_INFO **mi_8x8, + vp9_writer *bc) { + const VP9_COMMON *const cm = &cpi->common; + const MACROBLOCKD *const xd = &cpi->mb.e_mbd; + const struct segmentation *const seg = &cm->seg; + MODE_INFO *m = mi_8x8[0]; + const int ym = m->mbmi.mode; + const int segment_id = m->mbmi.segment_id; + MODE_INFO *above_mi = mi_8x8[-xd->mode_info_stride]; + MODE_INFO *left_mi = xd->left_available ? mi_8x8[-1] : NULL; + + if (seg->update_map) + write_segment_id(bc, seg, m->mbmi.segment_id); + + write_skip_coeff(cpi, segment_id, m, bc); + + if (m->mbmi.sb_type >= BLOCK_8X8 && cm->tx_mode == TX_MODE_SELECT) + write_selected_tx_size(cpi, m, m->mbmi.tx_size, m->mbmi.sb_type, bc); + + if (m->mbmi.sb_type >= BLOCK_8X8) { + const MB_PREDICTION_MODE A = above_block_mode(m, above_mi, 0); + const MB_PREDICTION_MODE L = left_block_mode(m, left_mi, 0); + write_intra_mode(bc, ym, vp9_kf_y_mode_prob[A][L]); + } else { + int idx, idy; + const int num_4x4_blocks_wide = num_4x4_blocks_wide_lookup[m->mbmi.sb_type]; + const int num_4x4_blocks_high = num_4x4_blocks_high_lookup[m->mbmi.sb_type]; + for (idy = 0; idy < 2; idy += num_4x4_blocks_high) { + for (idx = 0; idx < 2; idx += num_4x4_blocks_wide) { + int i = idy * 2 + idx; + const MB_PREDICTION_MODE A = above_block_mode(m, above_mi, i); + const MB_PREDICTION_MODE L = left_block_mode(m, left_mi, i); + const int bm = m->bmi[i].as_mode; +#ifdef ENTROPY_STATS + ++intra_mode_stats[A][L][bm]; +#endif + write_intra_mode(bc, bm, vp9_kf_y_mode_prob[A][L]); + } + } + } + + write_intra_mode(bc, m->mbmi.uv_mode, vp9_kf_uv_mode_prob[ym]); +} + +static void write_modes_b(VP9_COMP *cpi, const TileInfo *const tile, + vp9_writer *w, TOKENEXTRA **tok, TOKENEXTRA *tok_end, + int mi_row, int mi_col) { + VP9_COMMON *const cm = &cpi->common; + MACROBLOCKD *const xd = &cpi->mb.e_mbd; + MODE_INFO *m; + + xd->mi_8x8 = cm->mi_grid_visible + (mi_row * cm->mode_info_stride + mi_col); + m = xd->mi_8x8[0]; + + set_mi_row_col(xd, tile, + mi_row, num_8x8_blocks_high_lookup[m->mbmi.sb_type], + mi_col, num_8x8_blocks_wide_lookup[m->mbmi.sb_type], + cm->mi_rows, cm->mi_cols); + if (frame_is_intra_only(cm)) { + write_mb_modes_kf(cpi, xd->mi_8x8, w); +#ifdef ENTROPY_STATS + active_section = 8; +#endif + } else { + pack_inter_mode_mvs(cpi, m, w); +#ifdef ENTROPY_STATS + active_section = 1; +#endif + } + + assert(*tok < tok_end); + pack_mb_tokens(w, tok, tok_end); +} + +static void write_partition(VP9_COMP *cpi, int hbs, int mi_row, int mi_col, + PARTITION_TYPE p, BLOCK_SIZE bsize, vp9_writer *w) { + VP9_COMMON *const cm = &cpi->common; + const int ctx = partition_plane_context(cpi->above_seg_context, + cpi->left_seg_context, + mi_row, mi_col, bsize); + const vp9_prob *const probs = get_partition_probs(cm, ctx); + const int has_rows = (mi_row + hbs) < cm->mi_rows; + const int has_cols = (mi_col + hbs) < cm->mi_cols; + + if (has_rows && has_cols) { + write_token(w, vp9_partition_tree, probs, &vp9_partition_encodings[p]); + } else if (!has_rows && has_cols) { + assert(p == PARTITION_SPLIT || p == PARTITION_HORZ); + vp9_write(w, p == PARTITION_SPLIT, probs[1]); + } else if (has_rows && !has_cols) { + assert(p == PARTITION_SPLIT || p == PARTITION_VERT); + vp9_write(w, p == PARTITION_SPLIT, probs[2]); + } else { + assert(p == PARTITION_SPLIT); + } +} + +static void write_modes_sb(VP9_COMP *cpi, const TileInfo *const tile, + vp9_writer *w, TOKENEXTRA **tok, TOKENEXTRA *tok_end, + int mi_row, int mi_col, BLOCK_SIZE bsize) { + VP9_COMMON *const cm = &cpi->common; + const int bsl = b_width_log2(bsize); + const int bs = (1 << bsl) / 4; + PARTITION_TYPE partition; + BLOCK_SIZE subsize; + MODE_INFO *m = cm->mi_grid_visible[mi_row * cm->mode_info_stride + mi_col]; + + if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) + return; + + partition = partition_lookup[bsl][m->mbmi.sb_type]; + write_partition(cpi, bs, mi_row, mi_col, partition, bsize, w); + subsize = get_subsize(bsize, partition); + if (subsize < BLOCK_8X8) { + write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col); + } else { + switch (partition) { + case PARTITION_NONE: + write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col); + break; + case PARTITION_HORZ: + write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col); + if (mi_row + bs < cm->mi_rows) + write_modes_b(cpi, tile, w, tok, tok_end, mi_row + bs, mi_col); + break; + case PARTITION_VERT: + write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col); + if (mi_col + bs < cm->mi_cols) + write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col + bs); + break; + case PARTITION_SPLIT: + write_modes_sb(cpi, tile, w, tok, tok_end, mi_row, mi_col, subsize); + write_modes_sb(cpi, tile, w, tok, tok_end, mi_row, mi_col + bs, + subsize); + write_modes_sb(cpi, tile, w, tok, tok_end, mi_row + bs, mi_col, + subsize); + write_modes_sb(cpi, tile, w, tok, tok_end, mi_row + bs, mi_col + bs, + subsize); + break; + default: + assert(0); + } + } + + // update partition context + if (bsize >= BLOCK_8X8 && + (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT)) + update_partition_context(cpi->above_seg_context, cpi->left_seg_context, + mi_row, mi_col, subsize, bsize); +} + +static void write_modes(VP9_COMP *cpi, const TileInfo *const tile, + vp9_writer *w, TOKENEXTRA **tok, TOKENEXTRA *tok_end) { + int mi_row, mi_col; + + for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end; + mi_row += MI_BLOCK_SIZE) { + vp9_zero(cpi->left_seg_context); + for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end; + mi_col += MI_BLOCK_SIZE) + write_modes_sb(cpi, tile, w, tok, tok_end, mi_row, mi_col, BLOCK_64X64); + } +} + +static void build_tree_distribution(VP9_COMP *cpi, TX_SIZE tx_size) { + vp9_coeff_probs_model *coef_probs = cpi->frame_coef_probs[tx_size]; + vp9_coeff_count *coef_counts = cpi->coef_counts[tx_size]; + unsigned int (*eob_branch_ct)[REF_TYPES][COEF_BANDS][PREV_COEF_CONTEXTS] = + cpi->common.counts.eob_branch[tx_size]; + vp9_coeff_stats *coef_branch_ct = cpi->frame_branch_ct[tx_size]; + int i, j, k, l, m; + + for (i = 0; i < BLOCK_TYPES; ++i) { + for (j = 0; j < REF_TYPES; ++j) { + for (k = 0; k < COEF_BANDS; ++k) { + for (l = 0; l < PREV_COEF_CONTEXTS; ++l) { + if (l >= 3 && k == 0) + continue; + vp9_tree_probs_from_distribution(vp9_coef_tree, + coef_branch_ct[i][j][k][l], + coef_counts[i][j][k][l]); + coef_branch_ct[i][j][k][l][0][1] = eob_branch_ct[i][j][k][l] - + coef_branch_ct[i][j][k][l][0][0]; + for (m = 0; m < UNCONSTRAINED_NODES; ++m) + coef_probs[i][j][k][l][m] = get_binary_prob( + coef_branch_ct[i][j][k][l][m][0], + coef_branch_ct[i][j][k][l][m][1]); +#ifdef ENTROPY_STATS + if (!cpi->dummy_packing) { + int t; + for (t = 0; t < MAX_ENTROPY_TOKENS; ++t) + context_counters[tx_size][i][j][k][l][t] += + coef_counts[i][j][k][l][t]; + context_counters[tx_size][i][j][k][l][MAX_ENTROPY_TOKENS] += + eob_branch_ct[i][j][k][l]; + } +#endif + } + } + } + } +} + +static void build_coeff_contexts(VP9_COMP *cpi) { + TX_SIZE t; + for (t = TX_4X4; t <= TX_32X32; t++) + build_tree_distribution(cpi, t); +} + +static void update_coef_probs_common(vp9_writer* const bc, VP9_COMP *cpi, + TX_SIZE tx_size) { + vp9_coeff_probs_model *new_frame_coef_probs = cpi->frame_coef_probs[tx_size]; + vp9_coeff_probs_model *old_frame_coef_probs = + cpi->common.fc.coef_probs[tx_size]; + vp9_coeff_stats *frame_branch_ct = cpi->frame_branch_ct[tx_size]; + const vp9_prob upd = DIFF_UPDATE_PROB; + const int entropy_nodes_update = UNCONSTRAINED_NODES; + int i, j, k, l, t; + switch (cpi->sf.use_fast_coef_updates) { + case 0: { + /* dry run to see if there is any udpate at all needed */ + int savings = 0; + int update[2] = {0, 0}; + for (i = 0; i < BLOCK_TYPES; ++i) { + for (j = 0; j < REF_TYPES; ++j) { + for (k = 0; k < COEF_BANDS; ++k) { + for (l = 0; l < PREV_COEF_CONTEXTS; ++l) { + for (t = 0; t < entropy_nodes_update; ++t) { + vp9_prob newp = new_frame_coef_probs[i][j][k][l][t]; + const vp9_prob oldp = old_frame_coef_probs[i][j][k][l][t]; + int s; + int u = 0; + + if (l >= 3 && k == 0) + continue; + if (t == PIVOT_NODE) + s = vp9_prob_diff_update_savings_search_model( + frame_branch_ct[i][j][k][l][0], + old_frame_coef_probs[i][j][k][l], &newp, upd, i, j); + else + s = vp9_prob_diff_update_savings_search( + frame_branch_ct[i][j][k][l][t], oldp, &newp, upd); + if (s > 0 && newp != oldp) + u = 1; + if (u) + savings += s - (int)(vp9_cost_zero(upd)); + else + savings -= (int)(vp9_cost_zero(upd)); + update[u]++; + } + } + } + } + } + + // printf("Update %d %d, savings %d\n", update[0], update[1], savings); + /* Is coef updated at all */ + if (update[1] == 0 || savings < 0) { + vp9_write_bit(bc, 0); + return; + } + vp9_write_bit(bc, 1); + for (i = 0; i < BLOCK_TYPES; ++i) { + for (j = 0; j < REF_TYPES; ++j) { + for (k = 0; k < COEF_BANDS; ++k) { + for (l = 0; l < PREV_COEF_CONTEXTS; ++l) { + // calc probs and branch cts for this frame only + for (t = 0; t < entropy_nodes_update; ++t) { + vp9_prob newp = new_frame_coef_probs[i][j][k][l][t]; + vp9_prob *oldp = old_frame_coef_probs[i][j][k][l] + t; + const vp9_prob upd = DIFF_UPDATE_PROB; + int s; + int u = 0; + if (l >= 3 && k == 0) + continue; + if (t == PIVOT_NODE) + s = vp9_prob_diff_update_savings_search_model( + frame_branch_ct[i][j][k][l][0], + old_frame_coef_probs[i][j][k][l], &newp, upd, i, j); + else + s = vp9_prob_diff_update_savings_search( + frame_branch_ct[i][j][k][l][t], + *oldp, &newp, upd); + if (s > 0 && newp != *oldp) + u = 1; + vp9_write(bc, u, upd); +#ifdef ENTROPY_STATS + if (!cpi->dummy_packing) + ++tree_update_hist[tx_size][i][j][k][l][t][u]; +#endif + if (u) { + /* send/use new probability */ + vp9_write_prob_diff_update(bc, newp, *oldp); + *oldp = newp; + } + } + } + } + } + } + return; + } + + case 1: + case 2: { + const int prev_coef_contexts_to_update = + (cpi->sf.use_fast_coef_updates == 2 ? + PREV_COEF_CONTEXTS >> 1 : PREV_COEF_CONTEXTS); + const int coef_band_to_update = + (cpi->sf.use_fast_coef_updates == 2 ? + COEF_BANDS >> 1 : COEF_BANDS); + int updates = 0; + int noupdates_before_first = 0; + for (i = 0; i < BLOCK_TYPES; ++i) { + for (j = 0; j < REF_TYPES; ++j) { + for (k = 0; k < COEF_BANDS; ++k) { + for (l = 0; l < PREV_COEF_CONTEXTS; ++l) { + // calc probs and branch cts for this frame only + for (t = 0; t < entropy_nodes_update; ++t) { + vp9_prob newp = new_frame_coef_probs[i][j][k][l][t]; + vp9_prob *oldp = old_frame_coef_probs[i][j][k][l] + t; + int s; + int u = 0; + if (l >= 3 && k == 0) + continue; + if (l >= prev_coef_contexts_to_update || + k >= coef_band_to_update) { + u = 0; + } else { + if (t == PIVOT_NODE) + s = vp9_prob_diff_update_savings_search_model( + frame_branch_ct[i][j][k][l][0], + old_frame_coef_probs[i][j][k][l], &newp, upd, i, j); + else + s = vp9_prob_diff_update_savings_search( + frame_branch_ct[i][j][k][l][t], + *oldp, &newp, upd); + if (s > 0 && newp != *oldp) + u = 1; + } + updates += u; + if (u == 0 && updates == 0) { + noupdates_before_first++; +#ifdef ENTROPY_STATS + if (!cpi->dummy_packing) + ++tree_update_hist[tx_size][i][j][k][l][t][u]; +#endif + continue; + } + if (u == 1 && updates == 1) { + int v; + // first update + vp9_write_bit(bc, 1); + for (v = 0; v < noupdates_before_first; ++v) + vp9_write(bc, 0, upd); + } + vp9_write(bc, u, upd); +#ifdef ENTROPY_STATS + if (!cpi->dummy_packing) + ++tree_update_hist[tx_size][i][j][k][l][t][u]; +#endif + if (u) { + /* send/use new probability */ + vp9_write_prob_diff_update(bc, newp, *oldp); + *oldp = newp; + } + } + } + } + } + } + if (updates == 0) { + vp9_write_bit(bc, 0); // no updates + } + return; + } + + default: + assert(0); + } +} + +static void update_coef_probs(VP9_COMP* const cpi, vp9_writer* const bc) { + const TX_MODE tx_mode = cpi->common.tx_mode; + + vp9_clear_system_state(); + + // Build the cofficient contexts based on counts collected in encode loop + build_coeff_contexts(cpi); + + update_coef_probs_common(bc, cpi, TX_4X4); + + // do not do this if not even allowed + if (tx_mode > ONLY_4X4) + update_coef_probs_common(bc, cpi, TX_8X8); + + if (tx_mode > ALLOW_8X8) + update_coef_probs_common(bc, cpi, TX_16X16); + + if (tx_mode > ALLOW_16X16) + update_coef_probs_common(bc, cpi, TX_32X32); +} + +static void encode_loopfilter(struct loopfilter *lf, + struct vp9_write_bit_buffer *wb) { + int i; + + // Encode the loop filter level and type + vp9_wb_write_literal(wb, lf->filter_level, 6); + vp9_wb_write_literal(wb, lf->sharpness_level, 3); + + // Write out loop filter deltas applied at the MB level based on mode or + // ref frame (if they are enabled). + vp9_wb_write_bit(wb, lf->mode_ref_delta_enabled); + + if (lf->mode_ref_delta_enabled) { + // Do the deltas need to be updated + vp9_wb_write_bit(wb, lf->mode_ref_delta_update); + if (lf->mode_ref_delta_update) { + // Send update + for (i = 0; i < MAX_REF_LF_DELTAS; i++) { + const int delta = lf->ref_deltas[i]; + + // Frame level data + if (delta != lf->last_ref_deltas[i]) { + lf->last_ref_deltas[i] = delta; + vp9_wb_write_bit(wb, 1); + + assert(delta != 0); + vp9_wb_write_literal(wb, abs(delta) & 0x3F, 6); + vp9_wb_write_bit(wb, delta < 0); + } else { + vp9_wb_write_bit(wb, 0); + } + } + + // Send update + for (i = 0; i < MAX_MODE_LF_DELTAS; i++) { + const int delta = lf->mode_deltas[i]; + if (delta != lf->last_mode_deltas[i]) { + lf->last_mode_deltas[i] = delta; + vp9_wb_write_bit(wb, 1); + + assert(delta != 0); + vp9_wb_write_literal(wb, abs(delta) & 0x3F, 6); + vp9_wb_write_bit(wb, delta < 0); + } else { + vp9_wb_write_bit(wb, 0); + } + } + } + } +} + +static void write_delta_q(struct vp9_write_bit_buffer *wb, int delta_q) { + if (delta_q != 0) { + vp9_wb_write_bit(wb, 1); + vp9_wb_write_literal(wb, abs(delta_q), 4); + vp9_wb_write_bit(wb, delta_q < 0); + } else { + vp9_wb_write_bit(wb, 0); + } +} + +static void encode_quantization(VP9_COMMON *cm, + struct vp9_write_bit_buffer *wb) { + vp9_wb_write_literal(wb, cm->base_qindex, QINDEX_BITS); + write_delta_q(wb, cm->y_dc_delta_q); + write_delta_q(wb, cm->uv_dc_delta_q); + write_delta_q(wb, cm->uv_ac_delta_q); +} + + +static void encode_segmentation(VP9_COMP *cpi, + struct vp9_write_bit_buffer *wb) { + int i, j; + + struct segmentation *seg = &cpi->common.seg; + + vp9_wb_write_bit(wb, seg->enabled); + if (!seg->enabled) + return; + + // Segmentation map + vp9_wb_write_bit(wb, seg->update_map); + if (seg->update_map) { + // Select the coding strategy (temporal or spatial) + vp9_choose_segmap_coding_method(cpi); + // Write out probabilities used to decode unpredicted macro-block segments + for (i = 0; i < SEG_TREE_PROBS; i++) { + const int prob = seg->tree_probs[i]; + const int update = prob != MAX_PROB; + vp9_wb_write_bit(wb, update); + if (update) + vp9_wb_write_literal(wb, prob, 8); + } + + // Write out the chosen coding method. + vp9_wb_write_bit(wb, seg->temporal_update); + if (seg->temporal_update) { + for (i = 0; i < PREDICTION_PROBS; i++) { + const int prob = seg->pred_probs[i]; + const int update = prob != MAX_PROB; + vp9_wb_write_bit(wb, update); + if (update) + vp9_wb_write_literal(wb, prob, 8); + } + } + } + + // Segmentation data + vp9_wb_write_bit(wb, seg->update_data); + if (seg->update_data) { + vp9_wb_write_bit(wb, seg->abs_delta); + + for (i = 0; i < MAX_SEGMENTS; i++) { + for (j = 0; j < SEG_LVL_MAX; j++) { + const int active = vp9_segfeature_active(seg, i, j); + vp9_wb_write_bit(wb, active); + if (active) { + const int data = vp9_get_segdata(seg, i, j); + const int data_max = vp9_seg_feature_data_max(j); + + if (vp9_is_segfeature_signed(j)) { + vp9_encode_unsigned_max(wb, abs(data), data_max); + vp9_wb_write_bit(wb, data < 0); + } else { + vp9_encode_unsigned_max(wb, data, data_max); + } + } + } + } + } +} + + +static void encode_txfm_probs(VP9_COMP *cpi, vp9_writer *w) { + VP9_COMMON *const cm = &cpi->common; + + // Mode + vp9_write_literal(w, MIN(cm->tx_mode, ALLOW_32X32), 2); + if (cm->tx_mode >= ALLOW_32X32) + vp9_write_bit(w, cm->tx_mode == TX_MODE_SELECT); + + // Probabilities + if (cm->tx_mode == TX_MODE_SELECT) { + int i, j; + unsigned int ct_8x8p[TX_SIZES - 3][2]; + unsigned int ct_16x16p[TX_SIZES - 2][2]; + unsigned int ct_32x32p[TX_SIZES - 1][2]; + + + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + tx_counts_to_branch_counts_8x8(cm->counts.tx.p8x8[i], ct_8x8p); + for (j = 0; j < TX_SIZES - 3; j++) + vp9_cond_prob_diff_update(w, &cm->fc.tx_probs.p8x8[i][j], ct_8x8p[j]); + } + + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + tx_counts_to_branch_counts_16x16(cm->counts.tx.p16x16[i], ct_16x16p); + for (j = 0; j < TX_SIZES - 2; j++) + vp9_cond_prob_diff_update(w, &cm->fc.tx_probs.p16x16[i][j], + ct_16x16p[j]); + } + + for (i = 0; i < TX_SIZE_CONTEXTS; i++) { + tx_counts_to_branch_counts_32x32(cm->counts.tx.p32x32[i], ct_32x32p); + for (j = 0; j < TX_SIZES - 1; j++) + vp9_cond_prob_diff_update(w, &cm->fc.tx_probs.p32x32[i][j], + ct_32x32p[j]); + } +#ifdef MODE_STATS + if (!cpi->dummy_packing) + update_tx_count_stats(cm); +#endif + } +} + +static void write_interp_filter_type(INTERPOLATION_TYPE type, + struct vp9_write_bit_buffer *wb) { + const int type_to_literal[] = { 1, 0, 2, 3 }; + + vp9_wb_write_bit(wb, type == SWITCHABLE); + if (type != SWITCHABLE) + vp9_wb_write_literal(wb, type_to_literal[type], 2); +} + +static void fix_mcomp_filter_type(VP9_COMP *cpi) { + VP9_COMMON *const cm = &cpi->common; + + if (cm->mcomp_filter_type == SWITCHABLE) { + // Check to see if only one of the filters is actually used + int count[SWITCHABLE_FILTERS]; + int i, j, c = 0; + for (i = 0; i < SWITCHABLE_FILTERS; ++i) { + count[i] = 0; + for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j) + count[i] += cm->counts.switchable_interp[j][i]; + c += (count[i] > 0); + } + if (c == 1) { + // Only one filter is used. So set the filter at frame level + for (i = 0; i < SWITCHABLE_FILTERS; ++i) { + if (count[i]) { + cm->mcomp_filter_type = i; + break; + } + } + } + } +} + +static void write_tile_info(VP9_COMMON *cm, struct vp9_write_bit_buffer *wb) { + int min_log2_tile_cols, max_log2_tile_cols, ones; + vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols); + + // columns + ones = cm->log2_tile_cols - min_log2_tile_cols; + while (ones--) + vp9_wb_write_bit(wb, 1); + + if (cm->log2_tile_cols < max_log2_tile_cols) + vp9_wb_write_bit(wb, 0); + + // rows + vp9_wb_write_bit(wb, cm->log2_tile_rows != 0); + if (cm->log2_tile_rows != 0) + vp9_wb_write_bit(wb, cm->log2_tile_rows != 1); +} + +static int get_refresh_mask(VP9_COMP *cpi) { + // Should the GF or ARF be updated using the transmitted frame or buffer +#if CONFIG_MULTIPLE_ARF + if (!cpi->multi_arf_enabled && cpi->refresh_golden_frame && + !cpi->refresh_alt_ref_frame) { +#else + if (cpi->refresh_golden_frame && !cpi->refresh_alt_ref_frame && + !cpi->use_svc) { +#endif + // Preserve the previously existing golden frame and update the frame in + // the alt ref slot instead. This is highly specific to the use of + // alt-ref as a forward reference, and this needs to be generalized as + // other uses are implemented (like RTC/temporal scaling) + // + // gld_fb_idx and alt_fb_idx need to be swapped for future frames, but + // that happens in vp9_onyx_if.c:update_reference_frames() so that it can + // be done outside of the recode loop. + return (cpi->refresh_last_frame << cpi->lst_fb_idx) | + (cpi->refresh_golden_frame << cpi->alt_fb_idx); + } else { + int arf_idx = cpi->alt_fb_idx; +#if CONFIG_MULTIPLE_ARF + // Determine which ARF buffer to use to encode this ARF frame. + if (cpi->multi_arf_enabled) { + int sn = cpi->sequence_number; + arf_idx = (cpi->frame_coding_order[sn] < 0) ? + cpi->arf_buffer_idx[sn + 1] : + cpi->arf_buffer_idx[sn]; + } +#endif + return (cpi->refresh_last_frame << cpi->lst_fb_idx) | + (cpi->refresh_golden_frame << cpi->gld_fb_idx) | + (cpi->refresh_alt_ref_frame << arf_idx); + } +} + +static size_t encode_tiles(VP9_COMP *cpi, uint8_t *data_ptr) { + VP9_COMMON *const cm = &cpi->common; + vp9_writer residual_bc; + + int tile_row, tile_col; + TOKENEXTRA *tok[4][1 << 6], *tok_end; + size_t total_size = 0; + const int tile_cols = 1 << cm->log2_tile_cols; + const int tile_rows = 1 << cm->log2_tile_rows; + + vpx_memset(cpi->above_seg_context, 0, sizeof(*cpi->above_seg_context) * + mi_cols_aligned_to_sb(cm->mi_cols)); + + tok[0][0] = cpi->tok; + for (tile_row = 0; tile_row < tile_rows; tile_row++) { + if (tile_row) + tok[tile_row][0] = tok[tile_row - 1][tile_cols - 1] + + cpi->tok_count[tile_row - 1][tile_cols - 1]; + + for (tile_col = 1; tile_col < tile_cols; tile_col++) + tok[tile_row][tile_col] = tok[tile_row][tile_col - 1] + + cpi->tok_count[tile_row][tile_col - 1]; + } + + for (tile_row = 0; tile_row < tile_rows; tile_row++) { + for (tile_col = 0; tile_col < tile_cols; tile_col++) { + TileInfo tile; + + vp9_tile_init(&tile, cm, tile_row, tile_col); + tok_end = tok[tile_row][tile_col] + cpi->tok_count[tile_row][tile_col]; + + if (tile_col < tile_cols - 1 || tile_row < tile_rows - 1) + vp9_start_encode(&residual_bc, data_ptr + total_size + 4); + else + vp9_start_encode(&residual_bc, data_ptr + total_size); + + write_modes(cpi, &tile, &residual_bc, &tok[tile_row][tile_col], tok_end); + assert(tok[tile_row][tile_col] == tok_end); + vp9_stop_encode(&residual_bc); + if (tile_col < tile_cols - 1 || tile_row < tile_rows - 1) { + // size of this tile + write_be32(data_ptr + total_size, residual_bc.pos); + total_size += 4; + } + + total_size += residual_bc.pos; + } + } + + return total_size; +} + +static void write_display_size(VP9_COMP *cpi, struct vp9_write_bit_buffer *wb) { + VP9_COMMON *const cm = &cpi->common; + + const int scaling_active = cm->width != cm->display_width || + cm->height != cm->display_height; + vp9_wb_write_bit(wb, scaling_active); + if (scaling_active) { + vp9_wb_write_literal(wb, cm->display_width - 1, 16); + vp9_wb_write_literal(wb, cm->display_height - 1, 16); + } +} + +static void write_frame_size(VP9_COMP *cpi, + struct vp9_write_bit_buffer *wb) { + VP9_COMMON *const cm = &cpi->common; + vp9_wb_write_literal(wb, cm->width - 1, 16); + vp9_wb_write_literal(wb, cm->height - 1, 16); + + write_display_size(cpi, wb); +} + +static void write_frame_size_with_refs(VP9_COMP *cpi, + struct vp9_write_bit_buffer *wb) { + VP9_COMMON *const cm = &cpi->common; + int refs[ALLOWED_REFS_PER_FRAME] = {cpi->lst_fb_idx, cpi->gld_fb_idx, + cpi->alt_fb_idx}; + int i, found = 0; + + for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) { + YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[cm->ref_frame_map[refs[i]]]; + found = cm->width == cfg->y_crop_width && + cm->height == cfg->y_crop_height; + + // TODO(ivan): This prevents a bug while more than 3 buffers are used. Do it + // in a better way. + if (cpi->use_svc) { + found = 0; + } + vp9_wb_write_bit(wb, found); + if (found) { + break; + } + } + + if (!found) { + vp9_wb_write_literal(wb, cm->width - 1, 16); + vp9_wb_write_literal(wb, cm->height - 1, 16); + } + + write_display_size(cpi, wb); +} + +static void write_sync_code(struct vp9_write_bit_buffer *wb) { + vp9_wb_write_literal(wb, VP9_SYNC_CODE_0, 8); + vp9_wb_write_literal(wb, VP9_SYNC_CODE_1, 8); + vp9_wb_write_literal(wb, VP9_SYNC_CODE_2, 8); +} + +static void write_uncompressed_header(VP9_COMP *cpi, + struct vp9_write_bit_buffer *wb) { + VP9_COMMON *const cm = &cpi->common; + + vp9_wb_write_literal(wb, VP9_FRAME_MARKER, 2); + + // bitstream version. + // 00 - profile 0. 4:2:0 only + // 10 - profile 1. adds 4:4:4, 4:2:2, alpha + vp9_wb_write_bit(wb, cm->version); + vp9_wb_write_bit(wb, 0); + + vp9_wb_write_bit(wb, 0); + vp9_wb_write_bit(wb, cm->frame_type); + vp9_wb_write_bit(wb, cm->show_frame); + vp9_wb_write_bit(wb, cm->error_resilient_mode); + + if (cm->frame_type == KEY_FRAME) { + const COLOR_SPACE cs = UNKNOWN; + write_sync_code(wb); + vp9_wb_write_literal(wb, cs, 3); + if (cs != SRGB) { + vp9_wb_write_bit(wb, 0); // 0: [16, 235] (i.e. xvYCC), 1: [0, 255] + if (cm->version == 1) { + vp9_wb_write_bit(wb, cm->subsampling_x); + vp9_wb_write_bit(wb, cm->subsampling_y); + vp9_wb_write_bit(wb, 0); // has extra plane + } + } else { + assert(cm->version == 1); + vp9_wb_write_bit(wb, 0); // has extra plane + } + + write_frame_size(cpi, wb); + } else { + const int refs[ALLOWED_REFS_PER_FRAME] = {cpi->lst_fb_idx, cpi->gld_fb_idx, + cpi->alt_fb_idx}; + if (!cm->show_frame) + vp9_wb_write_bit(wb, cm->intra_only); + + if (!cm->error_resilient_mode) + vp9_wb_write_literal(wb, cm->reset_frame_context, 2); + + if (cm->intra_only) { + write_sync_code(wb); + + vp9_wb_write_literal(wb, get_refresh_mask(cpi), NUM_REF_FRAMES); + write_frame_size(cpi, wb); + } else { + int i; + vp9_wb_write_literal(wb, get_refresh_mask(cpi), NUM_REF_FRAMES); + for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) { + vp9_wb_write_literal(wb, refs[i], NUM_REF_FRAMES_LOG2); + vp9_wb_write_bit(wb, cm->ref_frame_sign_bias[LAST_FRAME + i]); + } + + write_frame_size_with_refs(cpi, wb); + + vp9_wb_write_bit(wb, cm->allow_high_precision_mv); + + fix_mcomp_filter_type(cpi); + write_interp_filter_type(cm->mcomp_filter_type, wb); + } + } + + if (!cm->error_resilient_mode) { + vp9_wb_write_bit(wb, cm->refresh_frame_context); + vp9_wb_write_bit(wb, cm->frame_parallel_decoding_mode); + } + + vp9_wb_write_literal(wb, cm->frame_context_idx, NUM_FRAME_CONTEXTS_LOG2); + + encode_loopfilter(&cm->lf, wb); + encode_quantization(cm, wb); + encode_segmentation(cpi, wb); + + write_tile_info(cm, wb); +} + +static size_t write_compressed_header(VP9_COMP *cpi, uint8_t *data) { + VP9_COMMON *const cm = &cpi->common; + MACROBLOCKD *const xd = &cpi->mb.e_mbd; + FRAME_CONTEXT *const fc = &cm->fc; + vp9_writer header_bc; + + vp9_start_encode(&header_bc, data); + + if (xd->lossless) + cm->tx_mode = ONLY_4X4; + else + encode_txfm_probs(cpi, &header_bc); + + update_coef_probs(cpi, &header_bc); + +#ifdef ENTROPY_STATS + active_section = 2; +#endif + + vp9_update_skip_probs(cpi, &header_bc); + + if (!frame_is_intra_only(cm)) { + int i; +#ifdef ENTROPY_STATS + active_section = 1; +#endif + + update_inter_mode_probs(cm, &header_bc); + vp9_zero(cm->counts.inter_mode); + + if (cm->mcomp_filter_type == SWITCHABLE) + update_switchable_interp_probs(cpi, &header_bc); + + for (i = 0; i < INTRA_INTER_CONTEXTS; i++) + vp9_cond_prob_diff_update(&header_bc, &fc->intra_inter_prob[i], + cpi->intra_inter_count[i]); + + if (cm->allow_comp_inter_inter) { + const int comp_pred_mode = cpi->common.comp_pred_mode; + const int use_compound_pred = comp_pred_mode != SINGLE_PREDICTION_ONLY; + const int use_hybrid_pred = comp_pred_mode == HYBRID_PREDICTION; + + vp9_write_bit(&header_bc, use_compound_pred); + if (use_compound_pred) { + vp9_write_bit(&header_bc, use_hybrid_pred); + if (use_hybrid_pred) + for (i = 0; i < COMP_INTER_CONTEXTS; i++) + vp9_cond_prob_diff_update(&header_bc, &fc->comp_inter_prob[i], + cpi->comp_inter_count[i]); + } + } + + if (cm->comp_pred_mode != COMP_PREDICTION_ONLY) { + for (i = 0; i < REF_CONTEXTS; i++) { + vp9_cond_prob_diff_update(&header_bc, &fc->single_ref_prob[i][0], + cpi->single_ref_count[i][0]); + vp9_cond_prob_diff_update(&header_bc, &fc->single_ref_prob[i][1], + cpi->single_ref_count[i][1]); + } + } + + if (cm->comp_pred_mode != SINGLE_PREDICTION_ONLY) + for (i = 0; i < REF_CONTEXTS; i++) + vp9_cond_prob_diff_update(&header_bc, &fc->comp_ref_prob[i], + cpi->comp_ref_count[i]); + + update_mbintra_mode_probs(cpi, &header_bc); + + for (i = 0; i < PARTITION_CONTEXTS; ++i) { + unsigned int bct[PARTITION_TYPES - 1][2]; + update_mode(&header_bc, PARTITION_TYPES, vp9_partition_tree, + fc->partition_prob[i], bct, + (unsigned int *)cpi->partition_count[i]); + } + + vp9_write_nmv_probs(cpi, cm->allow_high_precision_mv, &header_bc); + } + + vp9_stop_encode(&header_bc); + assert(header_bc.pos <= 0xffff); + + return header_bc.pos; +} + +void vp9_pack_bitstream(VP9_COMP *cpi, uint8_t *dest, unsigned long *size) { + uint8_t *data = dest; + size_t first_part_size; + struct vp9_write_bit_buffer wb = {data, 0}; + struct vp9_write_bit_buffer saved_wb; + + write_uncompressed_header(cpi, &wb); + saved_wb = wb; + vp9_wb_write_literal(&wb, 0, 16); // don't know in advance first part. size + + data += vp9_rb_bytes_written(&wb); + + vp9_compute_update_table(); + +#ifdef ENTROPY_STATS + if (cm->frame_type == INTER_FRAME) + active_section = 0; + else + active_section = 7; +#endif + + vp9_clear_system_state(); // __asm emms; + + first_part_size = write_compressed_header(cpi, data); + data += first_part_size; + vp9_wb_write_literal(&saved_wb, first_part_size, 16); + + data += encode_tiles(cpi, data); + + *size = data - dest; +} + +#ifdef ENTROPY_STATS +static void print_tree_update_for_type(FILE *f, + vp9_coeff_stats *tree_update_hist, + int block_types, const char *header) { + int i, j, k, l, m; + + fprintf(f, "const vp9_coeff_prob %s = {\n", header); + for (i = 0; i < block_types; i++) { + fprintf(f, " { \n"); + for (j = 0; j < REF_TYPES; j++) { + fprintf(f, " { \n"); + for (k = 0; k < COEF_BANDS; k++) { + fprintf(f, " {\n"); + for (l = 0; l < PREV_COEF_CONTEXTS; l++) { + fprintf(f, " {"); + for (m = 0; m < ENTROPY_NODES; m++) { + fprintf(f, "%3d, ", + get_binary_prob(tree_update_hist[i][j][k][l][m][0], + tree_update_hist[i][j][k][l][m][1])); + } + fprintf(f, "},\n"); + } + fprintf(f, "},\n"); + } + fprintf(f, " },\n"); + } + fprintf(f, " },\n"); + } + fprintf(f, "};\n"); +} + +void print_tree_update_probs() { + FILE *f = fopen("coefupdprob.h", "w"); + fprintf(f, "\n/* Update probabilities for token entropy tree. */\n\n"); + + print_tree_update_for_type(f, tree_update_hist[TX_4X4], BLOCK_TYPES, + "vp9_coef_update_probs_4x4[BLOCK_TYPES]"); + print_tree_update_for_type(f, tree_update_hist[TX_8X8], BLOCK_TYPES, + "vp9_coef_update_probs_8x8[BLOCK_TYPES]"); + print_tree_update_for_type(f, tree_update_hist[TX_16X16], BLOCK_TYPES, + "vp9_coef_update_probs_16x16[BLOCK_TYPES]"); + print_tree_update_for_type(f, tree_update_hist[TX_32X32], BLOCK_TYPES, + "vp9_coef_update_probs_32x32[BLOCK_TYPES]"); + + fclose(f); + f = fopen("treeupdate.bin", "wb"); + fwrite(tree_update_hist, sizeof(tree_update_hist), 1, f); + fclose(f); +} +#endif