/* * HEVC Parameter Set Decoding * * Copyright (C) 2012 - 2103 Guillaume Martres * Copyright (C) 2012 - 2103 Mickael Raulet * Copyright (C) 2012 - 2013 Gildas Cocherel * Copyright (C) 2013 Vittorio Giovara * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "golomb.h" #include "libavutil/imgutils.h" #include "hevc.h" static const uint8_t default_scaling_list_intra[] = { 16, 16, 16, 16, 17, 18, 21, 24, 16, 16, 16, 16, 17, 19, 22, 25, 16, 16, 17, 18, 20, 22, 25, 29, 16, 16, 18, 21, 24, 27, 31, 36, 17, 17, 20, 24, 30, 35, 41, 47, 18, 19, 22, 27, 35, 44, 54, 65, 21, 22, 25, 31, 41, 54, 70, 88, 24, 25, 29,36, 47, 65, 88, 115 }; static const uint8_t default_scaling_list_inter[] = { 16, 16, 16, 16, 17, 18, 20, 24, 16, 16, 16, 17, 18, 20, 24, 25, 16, 16, 17, 18, 20, 24, 25, 28, 16, 17, 18, 20, 24, 25, 28, 33, 17, 18, 20, 24, 25, 28, 33, 41, 18, 20, 24, 25, 28, 33, 41, 54, 20, 24, 25, 28, 33, 41, 54, 71, 24, 25, 28, 33, 41, 54, 71, 91 }; static const AVRational vui_sar[] = { { 0, 1 }, { 1, 1 }, { 12, 11 }, { 10, 11 }, { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 }, { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 }, { 64, 33 }, { 160, 99 }, { 4, 3 }, { 3, 2 }, { 2, 1 }, }; int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header) { HEVCLocalContext *lc = s->HEVClc; uint8_t rps_predict = 0; int delta_poc; int k0 = 0; int k1 = 0; int k = 0; int i; GetBitContext *gb = &lc->gb; if (rps != sps->st_rps && sps->nb_st_rps) rps_predict = get_bits1(gb); if (rps_predict) { const ShortTermRPS *rps_ridx; int delta_rps, abs_delta_rps; uint8_t use_delta_flag = 0; uint8_t delta_rps_sign; if (is_slice_header) { int delta_idx = get_ue_golomb_long(gb) + 1; if (delta_idx > sps->nb_st_rps) { av_log(s->avctx, AV_LOG_ERROR, "Invalid value of delta_idx " "in slice header RPS: %d > %d.\n", delta_idx, sps->nb_st_rps); return AVERROR_INVALIDDATA; } rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx]; } else rps_ridx = &sps->st_rps[rps - sps->st_rps - 1]; delta_rps_sign = get_bits1(gb); abs_delta_rps = get_ue_golomb_long(gb) + 1; delta_rps = (1 - (delta_rps_sign << 1)) * abs_delta_rps; for (i = 0; i <= rps_ridx->num_delta_pocs; i++) { int used = rps->used[k] = get_bits1(gb); if (!used) use_delta_flag = get_bits1(gb); if (used || use_delta_flag) { if (i < rps_ridx->num_delta_pocs) delta_poc = delta_rps + rps_ridx->delta_poc[i]; else delta_poc = delta_rps; rps->delta_poc[k] = delta_poc; if (delta_poc < 0) k0++; else k1++; k++; } } rps->num_delta_pocs = k; rps->num_negative_pics = k0; // sort in increasing order (smallest first) if (rps->num_delta_pocs != 0) { int used, tmp; for (i = 1; i < rps->num_delta_pocs; i++) { delta_poc = rps->delta_poc[i]; used = rps->used[i]; for (k = i-1 ; k >= 0; k--) { tmp = rps->delta_poc[k]; if (delta_poc < tmp ) { rps->delta_poc[k+1] = tmp; rps->used[k+1] = rps->used[k]; rps->delta_poc[k] = delta_poc; rps->used[k] = used; } } } } if ((rps->num_negative_pics >> 1) != 0) { int used; k = rps->num_negative_pics - 1; // flip the negative values to largest first for (i = 0; i < rps->num_negative_pics>>1; i++) { delta_poc = rps->delta_poc[i]; used = rps->used[i]; rps->delta_poc[i] = rps->delta_poc[k]; rps->used[i] = rps->used[k]; rps->delta_poc[k] = delta_poc; rps->used[k] = used; k--; } } } else { unsigned int prev, nb_positive_pics; rps->num_negative_pics = get_ue_golomb_long(gb); nb_positive_pics = get_ue_golomb_long(gb); if (rps->num_negative_pics >= MAX_REFS || nb_positive_pics >= MAX_REFS) { av_log(s->avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n"); return AVERROR_INVALIDDATA; } rps->num_delta_pocs = rps->num_negative_pics + nb_positive_pics; if (rps->num_delta_pocs) { prev = 0; for (i = 0; i < rps->num_negative_pics; i++) { delta_poc = get_ue_golomb_long(gb) + 1; prev -= delta_poc; rps->delta_poc[i] = prev; rps->used[i] = get_bits1(gb); } prev = 0; for (i = 0; i < nb_positive_pics; i++) { delta_poc = get_ue_golomb_long(gb) + 1; prev += delta_poc; rps->delta_poc[rps->num_negative_pics + i] = prev; rps->used[rps->num_negative_pics + i] = get_bits1(gb); } } } return 0; } static int decode_profile_tier_level(HEVCLocalContext *lc, PTL *ptl, int max_num_sub_layers) { int i, j; GetBitContext *gb = &lc->gb; ptl->general_profile_space = get_bits(gb, 2); ptl->general_tier_flag = get_bits1(gb); ptl->general_profile_idc = get_bits(gb, 5); for (i = 0; i < 32; i++) ptl->general_profile_compatibility_flag[i] = get_bits1(gb); skip_bits1(gb);// general_progressive_source_flag skip_bits1(gb);// general_interlaced_source_flag skip_bits1(gb);// general_non_packed_constraint_flag skip_bits1(gb);// general_frame_only_constraint_flag if (get_bits(gb, 16) != 0) // XXX_reserved_zero_44bits[0..15] return -1; if (get_bits(gb, 16) != 0) // XXX_reserved_zero_44bits[16..31] return -1; if (get_bits(gb, 12) != 0) // XXX_reserved_zero_44bits[32..43] return -1; ptl->general_level_idc = get_bits(gb, 8); for (i = 0; i < max_num_sub_layers - 1; i++) { ptl->sub_layer_profile_present_flag[i] = get_bits1(gb); ptl->sub_layer_level_present_flag[i] = get_bits1(gb); } if (max_num_sub_layers - 1 > 0) for (i = max_num_sub_layers - 1; i < 8; i++) skip_bits(gb, 2); // reserved_zero_2bits[i] for (i = 0; i < max_num_sub_layers - 1; i++) { if (ptl->sub_layer_profile_present_flag[i]) { ptl->sub_layer_profile_space[i] = get_bits(gb, 2); ptl->sub_layer_tier_flag[i] = get_bits(gb, 1); ptl->sub_layer_profile_idc[i] = get_bits(gb, 5); for (j = 0; j < 32; j++) ptl->sub_layer_profile_compatibility_flags[i][j] = get_bits1(gb); skip_bits1(gb);// sub_layer_progressive_source_flag skip_bits1(gb);// sub_layer_interlaced_source_flag skip_bits1(gb);// sub_layer_non_packed_constraint_flag skip_bits1(gb);// sub_layer_frame_only_constraint_flag if (get_bits(gb, 16) != 0) // sub_layer_reserved_zero_44bits[0..15] return -1; if (get_bits(gb, 16) != 0) // sub_layer_reserved_zero_44bits[16..31] return -1; if (get_bits(gb, 12) != 0) // sub_layer_reserved_zero_44bits[32..43] return -1; } if (ptl->sub_layer_level_present_flag[i]) ptl->sub_layer_level_idc[i] = get_bits(gb, 8); } return 0; } static void decode_hrd(HEVCContext *s) { av_log(s->avctx, AV_LOG_ERROR, "HRD parsing not yet implemented\n"); } int ff_hevc_decode_nal_vps(HEVCContext *s) { int i,j; GetBitContext *gb = &s->HEVClc->gb; int vps_id = 0; VPS *vps; av_log(s->avctx, AV_LOG_DEBUG, "Decoding VPS\n"); vps = av_mallocz(sizeof(*vps)); if (!vps) return AVERROR(ENOMEM); vps_id = get_bits(gb, 4); if (vps_id >= MAX_VPS_COUNT) { av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", vps_id); goto err; } if (get_bits(gb, 2) != 3) { // vps_reserved_three_2bits av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n"); goto err; } vps->vps_max_layers = get_bits(gb, 6) + 1; vps->vps_max_sub_layers = get_bits(gb, 3) + 1; vps->vps_temporal_id_nesting_flag = get_bits1(gb); if (get_bits(gb, 16) != 0xffff) { // vps_reserved_ffff_16bits av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n"); goto err; } if (vps->vps_max_sub_layers > MAX_SUB_LAYERS) { av_log(s->avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n", vps->vps_max_sub_layers); goto err; } if (decode_profile_tier_level(s->HEVClc, &vps->ptl, vps->vps_max_sub_layers) < 0) { av_log(s->avctx, AV_LOG_ERROR, "Error decoding profile tier level.\n"); goto err; } vps->vps_sub_layer_ordering_info_present_flag = get_bits1(gb); i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_sub_layers - 1; for (; i < vps->vps_max_sub_layers; i++) { vps->vps_max_dec_pic_buffering[i] = get_ue_golomb_long(gb) + 1; vps->vps_num_reorder_pics[i] = get_ue_golomb_long(gb); vps->vps_max_latency_increase[i] = get_ue_golomb_long(gb) - 1; if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE) { av_log(s->avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n", vps->vps_max_dec_pic_buffering[i] - 1); goto err; } if (vps->vps_num_reorder_pics[i] > vps->vps_max_dec_pic_buffering[i] - 1) { av_log(s->avctx, AV_LOG_ERROR, "vps_max_num_reorder_pics out of range: %d\n", vps->vps_num_reorder_pics[i]); goto err; } } vps->vps_max_layer_id = get_bits(gb, 6); vps->vps_num_layer_sets = get_ue_golomb_long(gb) + 1; for (i = 1; i < vps->vps_num_layer_sets; i++) for (j = 0; j <= vps->vps_max_layer_id; j++) skip_bits(gb, 1); // layer_id_included_flag[i][j] vps->vps_timing_info_present_flag = get_bits1(gb); if (vps->vps_timing_info_present_flag) { vps->vps_num_units_in_tick = get_bits_long(gb, 32); vps->vps_time_scale = get_bits_long(gb, 32); vps->vps_poc_proportional_to_timing_flag = get_bits1(gb); if (vps->vps_poc_proportional_to_timing_flag) vps->vps_num_ticks_poc_diff_one = get_ue_golomb_long(gb) + 1; vps->vps_num_hrd_parameters = get_ue_golomb_long(gb); if (vps->vps_num_hrd_parameters != 0) { avpriv_report_missing_feature(s->avctx, "support for vps_num_hrd_parameters != 0"); av_free(vps); return AVERROR_PATCHWELCOME; } } get_bits1(gb); /* vps_extension_flag */ av_free(s->vps_list[vps_id]); s->vps_list[vps_id] = vps; return 0; err: av_free(vps); return AVERROR_INVALIDDATA; } static void decode_vui(HEVCContext *s, HEVCSPS *sps) { VUI *vui = &sps->vui; GetBitContext *gb = &s->HEVClc->gb; int sar_present; av_log(s->avctx, AV_LOG_DEBUG, "Decoding VUI\n"); sar_present = get_bits1(gb); if (sar_present) { uint8_t sar_idx = get_bits(gb, 8); if (sar_idx < FF_ARRAY_ELEMS(vui_sar)) vui->sar = vui_sar[sar_idx]; else if (sar_idx == 255) { vui->sar.num = get_bits(gb, 16); vui->sar.den = get_bits(gb, 16); } else av_log(s->avctx, AV_LOG_WARNING, "Unknown SAR index: %u.\n", sar_idx); } vui->overscan_info_present_flag = get_bits1(gb); if (vui->overscan_info_present_flag) vui->overscan_appropriate_flag = get_bits1(gb); vui->video_signal_type_present_flag = get_bits1(gb); if (vui->video_signal_type_present_flag) { vui->video_format = get_bits(gb, 3); vui->video_full_range_flag = get_bits1(gb); vui->colour_description_present_flag = get_bits1(gb); if (vui->colour_description_present_flag) { vui->colour_primaries = get_bits(gb, 8); vui->transfer_characteristic = get_bits(gb, 8); vui->matrix_coeffs = get_bits(gb, 8); } } vui->chroma_loc_info_present_flag = get_bits1(gb); if (vui->chroma_loc_info_present_flag) { vui->chroma_sample_loc_type_top_field = get_ue_golomb_long(gb); vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_long(gb); } vui->neutra_chroma_indication_flag = get_bits1(gb); vui->field_seq_flag = get_bits1(gb); vui->frame_field_info_present_flag = get_bits1(gb); vui->default_display_window_flag = get_bits1(gb); if (vui->default_display_window_flag) { //TODO: * 2 is only valid for 420 vui->def_disp_win.left_offset = get_ue_golomb_long(gb) * 2; vui->def_disp_win.right_offset = get_ue_golomb_long(gb) * 2; vui->def_disp_win.top_offset = get_ue_golomb_long(gb) * 2; vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * 2; if (s->strict_def_disp_win && s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) { av_log(s->avctx, AV_LOG_DEBUG, "discarding vui default display window, " "original values are l:%u r:%u t:%u b:%u\n", vui->def_disp_win.left_offset, vui->def_disp_win.right_offset, vui->def_disp_win.top_offset, vui->def_disp_win.bottom_offset); vui->def_disp_win.left_offset = vui->def_disp_win.right_offset = vui->def_disp_win.top_offset = vui->def_disp_win.bottom_offset = 0; } } vui->vui_timing_info_present_flag = get_bits1(gb); if (vui->vui_timing_info_present_flag) { vui->vui_num_units_in_tick = get_bits(gb, 32); vui->vui_time_scale = get_bits(gb, 32); vui->vui_poc_proportional_to_timing_flag = get_bits1(gb); if (vui->vui_poc_proportional_to_timing_flag) vui->vui_num_ticks_poc_diff_one_minus1 = get_ue_golomb_long(gb); vui->vui_hrd_parameters_present_flag = get_bits1(gb); if (vui->vui_hrd_parameters_present_flag) decode_hrd(s); } vui->bitstream_restriction_flag = get_bits1(gb); if (vui->bitstream_restriction_flag) { vui->tiles_fixed_structure_flag = get_bits1(gb); vui->motion_vectors_over_pic_boundaries_flag = get_bits1(gb); vui->restricted_ref_pic_lists_flag = get_bits1(gb); vui->min_spatial_segmentation_idc = get_ue_golomb_long(gb); vui->max_bytes_per_pic_denom = get_ue_golomb_long(gb); vui->max_bits_per_min_cu_denom = get_ue_golomb_long(gb); vui->log2_max_mv_length_horizontal = get_ue_golomb_long(gb); vui->log2_max_mv_length_vertical = get_ue_golomb_long(gb); } } static void set_default_scaling_list_data(ScalingList *sl) { int matrixId; for (matrixId = 0; matrixId < 6; matrixId++) { // 4x4 default is 16 memset(sl->sl[0][matrixId], 16, 16); sl->sl_dc[0][matrixId] = 16; // default for 16x16 sl->sl_dc[1][matrixId] = 16; // default for 32x32 } memcpy(sl->sl[1][0], default_scaling_list_intra, 64); memcpy(sl->sl[1][1], default_scaling_list_intra, 64); memcpy(sl->sl[1][2], default_scaling_list_intra, 64); memcpy(sl->sl[1][3], default_scaling_list_inter, 64); memcpy(sl->sl[1][4], default_scaling_list_inter, 64); memcpy(sl->sl[1][5], default_scaling_list_inter, 64); memcpy(sl->sl[2][0], default_scaling_list_intra, 64); memcpy(sl->sl[2][1], default_scaling_list_intra, 64); memcpy(sl->sl[2][2], default_scaling_list_intra, 64); memcpy(sl->sl[2][3], default_scaling_list_inter, 64); memcpy(sl->sl[2][4], default_scaling_list_inter, 64); memcpy(sl->sl[2][5], default_scaling_list_inter, 64); memcpy(sl->sl[3][0], default_scaling_list_intra, 64); memcpy(sl->sl[3][1], default_scaling_list_inter, 64); } static int scaling_list_data(HEVCContext *s, ScalingList *sl) { GetBitContext *gb = &s->HEVClc->gb; uint8_t scaling_list_pred_mode_flag[4][6]; int32_t scaling_list_dc_coef[2][6]; int size_id, matrix_id, i, pos, delta; for (size_id = 0; size_id < 4; size_id++) for (matrix_id = 0; matrix_id < ((size_id == 3) ? 2 : 6); matrix_id++) { scaling_list_pred_mode_flag[size_id][matrix_id] = get_bits1(gb); if (!scaling_list_pred_mode_flag[size_id][matrix_id]) { delta = get_ue_golomb_long(gb); // Only need to handle non-zero delta. Zero means default, which should already be in the arrays. if (delta) { // Copy from previous array. if (matrix_id - delta < 0) { av_log(s->avctx, AV_LOG_ERROR, "Invalid delta in scaling list data: %d.\n", delta); return AVERROR_INVALIDDATA; } memcpy(sl->sl[size_id][matrix_id], sl->sl[size_id][matrix_id - delta], size_id > 0 ? 64 : 16); if (size_id > 1) sl->sl_dc[size_id - 2][matrix_id] = sl->sl_dc[size_id - 2][matrix_id - delta]; } } else { int next_coef; int coef_num; int32_t scaling_list_delta_coef; next_coef = 8; coef_num = FFMIN(64, (1 << (4 + (size_id << 1)))); if (size_id > 1) { scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8; next_coef = scaling_list_dc_coef[size_id - 2][matrix_id]; sl->sl_dc[size_id - 2][matrix_id] = next_coef; } for (i = 0; i < coef_num; i++) { if (size_id == 0) pos = 4 * ff_hevc_diag_scan4x4_y[i] + ff_hevc_diag_scan4x4_x[i]; else pos = 8 * ff_hevc_diag_scan8x8_y[i] + ff_hevc_diag_scan8x8_x[i]; scaling_list_delta_coef = get_se_golomb(gb); next_coef = (next_coef + scaling_list_delta_coef + 256 ) % 256; sl->sl[size_id][matrix_id][pos] = next_coef; } } } return 0; } int ff_hevc_decode_nal_sps(HEVCContext *s) { const AVPixFmtDescriptor *desc; GetBitContext *gb = &s->HEVClc->gb; int ret = 0; int sps_id = 0; int log2_diff_max_min_transform_block_size; int bit_depth_chroma, start, vui_present, sublayer_ordering_info; int i; HEVCSPS *sps; AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps)); if (!sps_buf) return AVERROR(ENOMEM); sps = (HEVCSPS*)sps_buf->data; av_log(s->avctx, AV_LOG_DEBUG, "Decoding SPS\n"); // Coded parameters sps->vps_id = get_bits(gb, 4); if (sps->vps_id >= MAX_VPS_COUNT) { av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id); ret = AVERROR_INVALIDDATA; goto err; } sps->max_sub_layers = get_bits(gb, 3) + 1; if (sps->max_sub_layers > MAX_SUB_LAYERS) { av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n", sps->max_sub_layers); ret = AVERROR_INVALIDDATA; goto err; } skip_bits1(gb); // temporal_id_nesting_flag if (decode_profile_tier_level(s->HEVClc, &sps->ptl, sps->max_sub_layers) < 0) { av_log(s->avctx, AV_LOG_ERROR, "error decoding profile tier level\n"); ret = AVERROR_INVALIDDATA; goto err; } sps_id = get_ue_golomb_long(gb); if (sps_id >= MAX_SPS_COUNT) { av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", sps_id); ret = AVERROR_INVALIDDATA; goto err; } sps->chroma_format_idc = get_ue_golomb_long(gb); if (sps->chroma_format_idc != 1) { avpriv_report_missing_feature(s->avctx, "chroma_format_idc != 1\n"); ret = AVERROR_INVALIDDATA; goto err; } if (sps->chroma_format_idc == 3) sps->separate_colour_plane_flag = get_bits1(gb); sps->width = get_ue_golomb_long(gb); sps->height = get_ue_golomb_long(gb); if ((ret = av_image_check_size(sps->width, sps->height, 0, s->avctx)) < 0) goto err; if (get_bits1(gb)) { // pic_conformance_flag //TODO: * 2 is only valid for 420 sps->pic_conf_win.left_offset = get_ue_golomb_long(gb) * 2; sps->pic_conf_win.right_offset = get_ue_golomb_long(gb) * 2; sps->pic_conf_win.top_offset = get_ue_golomb_long(gb) * 2; sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * 2; if (s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) { av_log(s->avctx, AV_LOG_DEBUG, "discarding sps conformance window, " "original values are l:%u r:%u t:%u b:%u\n", sps->pic_conf_win.left_offset, sps->pic_conf_win.right_offset, sps->pic_conf_win.top_offset, sps->pic_conf_win.bottom_offset); sps->pic_conf_win.left_offset = sps->pic_conf_win.right_offset = sps->pic_conf_win.top_offset = sps->pic_conf_win.bottom_offset = 0; } sps->output_window = sps->pic_conf_win; } sps->bit_depth = get_ue_golomb_long(gb) + 8; bit_depth_chroma = get_ue_golomb_long(gb) + 8; if (bit_depth_chroma != sps->bit_depth) { av_log(s->avctx, AV_LOG_ERROR, "Luma bit depth (%d) is different from chroma bit depth (%d), this is unsupported.\n", sps->bit_depth, bit_depth_chroma); ret = AVERROR_INVALIDDATA; goto err; } if (sps->chroma_format_idc == 1) { switch (sps->bit_depth) { case 8: sps->pix_fmt = AV_PIX_FMT_YUV420P; break; case 9: sps->pix_fmt = AV_PIX_FMT_YUV420P9; break; case 10: sps->pix_fmt = AV_PIX_FMT_YUV420P10; break; default: av_log(s->avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", sps->bit_depth); ret = AVERROR_PATCHWELCOME; goto err; } } else { av_log(s->avctx, AV_LOG_ERROR, "non-4:2:0 support is currently unspecified.\n"); return AVERROR_PATCHWELCOME; } desc = av_pix_fmt_desc_get(sps->pix_fmt); if (!desc) { ret = AVERROR(EINVAL); goto err; } sps->hshift[0] = sps->vshift[0] = 0; sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w; sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h; sps->pixel_shift = sps->bit_depth > 8; sps->log2_max_poc_lsb = get_ue_golomb_long(gb) + 4; if (sps->log2_max_poc_lsb > 16) { av_log(s->avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n", sps->log2_max_poc_lsb - 4); ret = AVERROR_INVALIDDATA; goto err; } sublayer_ordering_info = get_bits1(gb); start = sublayer_ordering_info ? 0 : sps->max_sub_layers - 1; for (i = start; i < sps->max_sub_layers; i++) { sps->temporal_layer[i].max_dec_pic_buffering = get_ue_golomb_long(gb) + 1; sps->temporal_layer[i].num_reorder_pics = get_ue_golomb_long(gb); sps->temporal_layer[i].max_latency_increase = get_ue_golomb_long(gb) - 1; if (sps->temporal_layer[i].max_dec_pic_buffering > MAX_DPB_SIZE) { av_log(s->avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n", sps->temporal_layer[i].max_dec_pic_buffering - 1); ret = AVERROR_INVALIDDATA; goto err; } if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) { av_log(s->avctx, AV_LOG_ERROR, "sps_max_num_reorder_pics out of range: %d\n", sps->temporal_layer[i].num_reorder_pics); ret = AVERROR_INVALIDDATA; goto err; } } if (!sublayer_ordering_info) { for (i = 0; i < start; i++){ sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering; sps->temporal_layer[i].num_reorder_pics = sps->temporal_layer[start].num_reorder_pics; sps->temporal_layer[i].max_latency_increase = sps->temporal_layer[start].max_latency_increase; } } sps->log2_min_cb_size = get_ue_golomb_long(gb) + 3; sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb); sps->log2_min_tb_size = get_ue_golomb_long(gb) + 2; log2_diff_max_min_transform_block_size = get_ue_golomb_long(gb); sps->log2_max_trafo_size = log2_diff_max_min_transform_block_size + sps->log2_min_tb_size; if (sps->log2_min_tb_size >= sps->log2_min_cb_size) { av_log(s->avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size"); ret = AVERROR_INVALIDDATA; goto err; } sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb); sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb); sps->scaling_list_enable_flag = get_bits1(gb); if (sps->scaling_list_enable_flag) { set_default_scaling_list_data(&sps->scaling_list); if (get_bits1(gb)) { ret = scaling_list_data(s, &sps->scaling_list); if (ret < 0) goto err; } } sps->amp_enabled_flag = get_bits1(gb); sps->sao_enabled = get_bits1(gb); sps->pcm_enabled_flag = get_bits1(gb); if (sps->pcm_enabled_flag) { sps->pcm.bit_depth = get_bits(gb, 4) + 1; sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1; sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3; sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size + get_ue_golomb_long(gb); if (sps->pcm.bit_depth > sps->bit_depth) { av_log(s->avctx, AV_LOG_ERROR, "PCM bit depth (%d) is greater than normal bit depth (%d)\n", sps->pcm.bit_depth, sps->bit_depth); ret = AVERROR_INVALIDDATA; goto err; } sps->pcm.loop_filter_disable_flag = get_bits1(gb); } sps->nb_st_rps = get_ue_golomb_long(gb); if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) { av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n", sps->nb_st_rps); ret = AVERROR_INVALIDDATA; goto err; } for (i = 0; i < sps->nb_st_rps; i++) { if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i], sps, 0)) < 0) goto err; } sps->long_term_ref_pics_present_flag = get_bits1(gb); if (sps->long_term_ref_pics_present_flag) { sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb); for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) { sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb); sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb); } } sps->sps_temporal_mvp_enabled_flag = get_bits1(gb); sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb); sps->vui.sar = vui_sar[0]; vui_present = get_bits1(gb); if (vui_present) decode_vui(s, sps); skip_bits1(gb); // sps_extension_flag if (s->strict_def_disp_win) { sps->output_window.left_offset += sps->vui.def_disp_win.left_offset; sps->output_window.right_offset += sps->vui.def_disp_win.right_offset; sps->output_window.top_offset += sps->vui.def_disp_win.top_offset; sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset; } if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) && !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) { sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift)); av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d " "chroma samples to preserve alignment.\n", sps->output_window.left_offset); } sps->output_width = sps->width - (sps->output_window.left_offset + sps->output_window.right_offset); sps->output_height = sps->height - (sps->output_window.top_offset + sps->output_window.bottom_offset); if (sps->output_width <= 0 || sps->output_height <= 0) { av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n", sps->output_width, sps->output_height); if (s->avctx->err_recognition & AV_EF_EXPLODE) { ret = AVERROR_INVALIDDATA; goto err; } av_log(s->avctx, AV_LOG_WARNING, "Displaying the whole video surface.\n"); sps->pic_conf_win.left_offset = sps->pic_conf_win.right_offset = sps->pic_conf_win.top_offset = sps->pic_conf_win.bottom_offset = 0; sps->output_width = sps->width; sps->output_height = sps->height; } // Inferred parameters sps->log2_ctb_size = sps->log2_min_cb_size + sps->log2_diff_max_min_coding_block_size; sps->log2_min_pu_size = sps->log2_min_cb_size - 1; sps->ctb_width = (sps->width + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size; sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size; sps->ctb_size = sps->ctb_width * sps->ctb_height; sps->min_cb_width = sps->width >> sps->log2_min_cb_size; sps->min_cb_height = sps->height >> sps->log2_min_cb_size; sps->min_tb_width = sps->width >> sps->log2_min_tb_size; sps->min_tb_height = sps->height >> sps->log2_min_tb_size; sps->min_pu_width = sps->width >> sps->log2_min_pu_size; sps->min_pu_height = sps->height >> sps->log2_min_pu_size; sps->qp_bd_offset = 6 * (sps->bit_depth - 8); if (sps->width & ((1 << sps->log2_min_cb_size) - 1) || sps->height & ((1 << sps->log2_min_cb_size) - 1)) { av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n"); goto err; } if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) { av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size); goto err; } if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) { av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n", sps->max_transform_hierarchy_depth_inter); goto err; } if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) { av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n", sps->max_transform_hierarchy_depth_intra); goto err; } if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) { av_log(s->avctx, AV_LOG_ERROR, "max transform block size out of range: %d\n", sps->log2_max_trafo_size); goto err; } if (s->avctx->debug & FF_DEBUG_BITSTREAM) { av_log(s->avctx, AV_LOG_DEBUG, "Parsed SPS: id %d; coded wxh: %dx%d; " "cropped wxh: %dx%d; pix_fmt: %s.\n", sps_id, sps->width, sps->height, sps->output_width, sps->output_height, av_get_pix_fmt_name(sps->pix_fmt)); } /* check if this is a repeat of an already parsed SPS, then keep the * original one. * otherwise drop all PPSes that depend on it */ if (s->sps_list[sps_id] && !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) { av_buffer_unref(&sps_buf); } else { for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) { if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id) av_buffer_unref(&s->pps_list[i]); } av_buffer_unref(&s->sps_list[sps_id]); s->sps_list[sps_id] = sps_buf; } return 0; err: av_buffer_unref(&sps_buf); return ret; } static void hevc_pps_free(void *opaque, uint8_t *data) { HEVCPPS *pps = (HEVCPPS*)data; av_freep(&pps->column_width); av_freep(&pps->row_height); av_freep(&pps->col_bd); av_freep(&pps->row_bd); av_freep(&pps->col_idxX); av_freep(&pps->ctb_addr_rs_to_ts); av_freep(&pps->ctb_addr_ts_to_rs); av_freep(&pps->tile_pos_rs); av_freep(&pps->tile_id); av_freep(&pps->min_cb_addr_zs); av_freep(&pps->min_tb_addr_zs); av_freep(&pps); } int ff_hevc_decode_nal_pps(HEVCContext *s) { GetBitContext *gb = &s->HEVClc->gb; HEVCSPS *sps = NULL; int pic_area_in_ctbs, pic_area_in_min_cbs, pic_area_in_min_tbs; int log2_diff_ctb_min_tb_size; int i, j, x, y, ctb_addr_rs, tile_id; int ret = 0; int pps_id = 0; AVBufferRef *pps_buf; HEVCPPS *pps = av_mallocz(sizeof(*pps)); if (!pps) return AVERROR(ENOMEM); pps_buf = av_buffer_create((uint8_t*)pps, sizeof(*pps), hevc_pps_free, NULL, 0); if (!pps_buf) { av_freep(&pps); return AVERROR(ENOMEM); } av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n"); // Default values pps->loop_filter_across_tiles_enabled_flag = 1; pps->num_tile_columns = 1; pps->num_tile_rows = 1; pps->uniform_spacing_flag = 1; pps->disable_dbf = 0; pps->beta_offset = 0; pps->tc_offset = 0; // Coded parameters pps_id = get_ue_golomb_long(gb); if (pps_id >= MAX_PPS_COUNT) { av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id); ret = AVERROR_INVALIDDATA; goto err; } pps->sps_id = get_ue_golomb_long(gb); if (pps->sps_id >= MAX_SPS_COUNT) { av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id); ret = AVERROR_INVALIDDATA; goto err; } if (!s->sps_list[pps->sps_id]) { av_log(s->avctx, AV_LOG_ERROR, "SPS does not exist \n"); ret = AVERROR_INVALIDDATA; goto err; } sps = (HEVCSPS*)s->sps_list[pps->sps_id]->data; pps->dependent_slice_segments_enabled_flag = get_bits1(gb); pps->output_flag_present_flag = get_bits1(gb); pps->num_extra_slice_header_bits = get_bits(gb, 3); pps->sign_data_hiding_flag = get_bits1(gb); pps->cabac_init_present_flag = get_bits1(gb); pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1; pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1; pps->pic_init_qp_minus26 = get_se_golomb(gb); pps->constrained_intra_pred_flag = get_bits1(gb); pps->transform_skip_enabled_flag = get_bits1(gb); pps->cu_qp_delta_enabled_flag = get_bits1(gb); pps->diff_cu_qp_delta_depth = 0; if (pps->cu_qp_delta_enabled_flag) pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb); pps->cb_qp_offset = get_se_golomb(gb); if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) { av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n", pps->cb_qp_offset); ret = AVERROR_INVALIDDATA; goto err; } pps->cr_qp_offset = get_se_golomb(gb); if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) { av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n", pps->cr_qp_offset); ret = AVERROR_INVALIDDATA; goto err; } pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb); pps->weighted_pred_flag = get_bits1(gb); pps->weighted_bipred_flag = get_bits1(gb); pps->transquant_bypass_enable_flag = get_bits1(gb); pps->tiles_enabled_flag = get_bits1(gb); pps->entropy_coding_sync_enabled_flag = get_bits1(gb); if (pps->tiles_enabled_flag) { pps->num_tile_columns = get_ue_golomb_long(gb) + 1; pps->num_tile_rows = get_ue_golomb_long(gb) + 1; if (pps->num_tile_columns == 0 || pps->num_tile_columns >= sps->width) { av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n", pps->num_tile_columns - 1); ret = AVERROR_INVALIDDATA; goto err; } if (pps->num_tile_rows == 0 || pps->num_tile_rows >= sps->height) { av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n", pps->num_tile_rows - 1); ret = AVERROR_INVALIDDATA; goto err; } pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width)); pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height)); if (!pps->column_width || !pps->row_height) { ret = AVERROR(ENOMEM); goto err; } pps->uniform_spacing_flag = get_bits1(gb); if (!pps->uniform_spacing_flag) { int sum = 0; for (i = 0; i < pps->num_tile_columns - 1; i++) { pps->column_width[i] = get_ue_golomb_long(gb) + 1; sum += pps->column_width[i]; } if (sum >= sps->ctb_width) { av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n"); ret = AVERROR_INVALIDDATA; goto err; } pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum; sum = 0; for (i = 0; i < pps->num_tile_rows - 1; i++) { pps->row_height[i] = get_ue_golomb_long(gb) + 1; sum += pps->row_height[i]; } if (sum >= sps->ctb_height) { av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n"); ret = AVERROR_INVALIDDATA; goto err; } pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum; } pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb); } pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb); pps->deblocking_filter_control_present_flag = get_bits1(gb); if (pps->deblocking_filter_control_present_flag) { pps->deblocking_filter_override_enabled_flag = get_bits1(gb); pps->disable_dbf = get_bits1(gb); if (!pps->disable_dbf) { pps->beta_offset = get_se_golomb(gb) * 2; pps->tc_offset = get_se_golomb(gb) * 2; if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) { av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n", pps->beta_offset/2); ret = AVERROR_INVALIDDATA; goto err; } if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) { av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n", pps->tc_offset/2); ret = AVERROR_INVALIDDATA; goto err; } } } pps->pps_scaling_list_data_present_flag = get_bits1(gb); if (pps->pps_scaling_list_data_present_flag) { set_default_scaling_list_data(&pps->scaling_list); ret = scaling_list_data(s, &pps->scaling_list); if (ret < 0) goto err; } pps->lists_modification_present_flag = get_bits1(gb); pps->log2_parallel_merge_level = get_ue_golomb_long(gb) + 2; if (pps->log2_parallel_merge_level > sps->log2_ctb_size) { av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n", pps->log2_parallel_merge_level - 2); ret = AVERROR_INVALIDDATA; goto err; } pps->slice_header_extension_present_flag = get_bits1(gb); pps->pps_extension_flag = get_bits1(gb); // Inferred parameters pps->col_bd = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd)); pps->row_bd = av_malloc_array(pps->num_tile_rows + 1, sizeof(*pps->row_bd)); pps->col_idxX = av_malloc_array(sps->ctb_width, sizeof(*pps->col_idxX)); if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) { ret = AVERROR(ENOMEM); goto err; } if (pps->uniform_spacing_flag) { if (!pps->column_width) { pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width)); pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height)); } if (!pps->column_width || !pps->row_height) { ret = AVERROR(ENOMEM); goto err; } for (i = 0; i < pps->num_tile_columns; i++) { pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns - (i * sps->ctb_width) / pps->num_tile_columns; } for (i = 0; i < pps->num_tile_rows; i++) { pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows - (i * sps->ctb_height) / pps->num_tile_rows; } } pps->col_bd[0] = 0; for (i = 0; i < pps->num_tile_columns; i++) pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i]; pps->row_bd[0] = 0; for (i = 0; i < pps->num_tile_rows; i++) pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i]; for (i = 0, j = 0; i < sps->ctb_width; i++) { if (i > pps->col_bd[j]) j++; pps->col_idxX[i] = j; } /** * 6.5 */ pic_area_in_ctbs = sps->ctb_width * sps->ctb_height; pic_area_in_min_cbs = sps->min_cb_width * sps->min_cb_height; pic_area_in_min_tbs = sps->min_tb_width * sps->min_tb_height; pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_rs_to_ts)); pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_ts_to_rs)); pps->tile_id = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->tile_id)); pps->min_cb_addr_zs = av_malloc_array(pic_area_in_min_cbs, sizeof(*pps->min_cb_addr_zs)); pps->min_tb_addr_zs = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs)); if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs || !pps->tile_id || !pps->min_cb_addr_zs || !pps->min_tb_addr_zs) { ret = AVERROR(ENOMEM); goto err; } for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) { int tb_x = ctb_addr_rs % sps->ctb_width; int tb_y = ctb_addr_rs / sps->ctb_width; int tile_x = 0; int tile_y = 0; int val = 0; for (i = 0; i < pps->num_tile_columns; i++) { if (tb_x < pps->col_bd[i + 1]) { tile_x = i; break; } } for (i = 0; i < pps->num_tile_rows; i++) { if (tb_y < pps->row_bd[i + 1]) { tile_y = i; break; } } for (i = 0; i < tile_x; i++ ) val += pps->row_height[tile_y] * pps->column_width[i]; for (i = 0; i < tile_y; i++ ) val += sps->ctb_width * pps->row_height[i]; val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] + tb_x - pps->col_bd[tile_x]; pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val; pps->ctb_addr_ts_to_rs[val] = ctb_addr_rs; } for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++) for (i = 0; i < pps->num_tile_columns; i++, tile_id++) for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++) for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++) pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id; pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs)); if (!pps->tile_pos_rs) { ret = AVERROR(ENOMEM); goto err; } for (j = 0; j < pps->num_tile_rows; j++) for (i = 0; i < pps->num_tile_columns; i++) pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i]; for (y = 0; y < sps->min_cb_height; y++) { for (x = 0; x < sps->min_cb_width; x++) { int tb_x = x >> sps->log2_diff_max_min_coding_block_size; int tb_y = y >> sps->log2_diff_max_min_coding_block_size; int ctb_addr_rs = sps->ctb_width * tb_y + tb_x; int val = pps->ctb_addr_rs_to_ts[ctb_addr_rs] << (sps->log2_diff_max_min_coding_block_size * 2); for (i = 0; i < sps->log2_diff_max_min_coding_block_size; i++) { int m = 1 << i; val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0); } pps->min_cb_addr_zs[y * sps->min_cb_width + x] = val; } } log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size; for (y = 0; y < sps->min_tb_height; y++) { for (x = 0; x < sps->min_tb_width; x++) { int tb_x = x >> log2_diff_ctb_min_tb_size; int tb_y = y >> log2_diff_ctb_min_tb_size; int ctb_addr_rs = sps->ctb_width * tb_y + tb_x; int val = pps->ctb_addr_rs_to_ts[ctb_addr_rs] << (log2_diff_ctb_min_tb_size * 2); for (i = 0; i < log2_diff_ctb_min_tb_size; i++) { int m = 1 << i; val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0); } pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val; } } av_buffer_unref(&s->pps_list[pps_id]); s->pps_list[pps_id] = pps_buf; return 0; err: av_buffer_unref(&pps_buf); return ret; }