| /* |
| * HEVC Supplementary Enhancement Information messages |
| * |
| * Copyright (C) 2012 - 2013 Guillaume Martres |
| * 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 "hevc.h" |
| |
| enum HEVC_SEI_TYPE { |
| SEI_TYPE_BUFFERING_PERIOD = 0, |
| SEI_TYPE_PICTURE_TIMING = 1, |
| SEI_TYPE_PAN_SCAN_RECT = 2, |
| SEI_TYPE_FILLER_PAYLOAD = 3, |
| SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35 = 4, |
| SEI_TYPE_USER_DATA_UNREGISTERED = 5, |
| SEI_TYPE_RECOVERY_POINT = 6, |
| SEI_TYPE_SCENE_INFO = 9, |
| SEI_TYPE_FULL_FRAME_SNAPSHOT = 15, |
| SEI_TYPE_PROGRESSIVE_REFINEMENT_SEGMENT_START = 16, |
| SEI_TYPE_PROGRESSIVE_REFINEMENT_SEGMENT_END = 17, |
| SEI_TYPE_FILM_GRAIN_CHARACTERISTICS = 19, |
| SEI_TYPE_POST_FILTER_HINT = 22, |
| SEI_TYPE_TONE_MAPPING_INFO = 23, |
| SEI_TYPE_FRAME_PACKING = 45, |
| SEI_TYPE_DISPLAY_ORIENTATION = 47, |
| SEI_TYPE_SOP_DESCRIPTION = 128, |
| SEI_TYPE_ACTIVE_PARAMETER_SETS = 129, |
| SEI_TYPE_DECODING_UNIT_INFO = 130, |
| SEI_TYPE_TEMPORAL_LEVEL0_INDEX = 131, |
| SEI_TYPE_DECODED_PICTURE_HASH = 132, |
| SEI_TYPE_SCALABLE_NESTING = 133, |
| SEI_TYPE_REGION_REFRESH_INFO = 134, |
| SEI_TYPE_MASTERING_DISPLAY_INFO = 137, |
| SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO = 144, |
| }; |
| |
| static int decode_nal_sei_decoded_picture_hash(HEVCContext *s) |
| { |
| int cIdx, i; |
| uint8_t hash_type; |
| //uint16_t picture_crc; |
| //uint32_t picture_checksum; |
| GetBitContext *gb = &s->HEVClc->gb; |
| hash_type = get_bits(gb, 8); |
| |
| for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) { |
| if (hash_type == 0) { |
| s->is_md5 = 1; |
| for (i = 0; i < 16; i++) |
| s->md5[cIdx][i] = get_bits(gb, 8); |
| } else if (hash_type == 1) { |
| // picture_crc = get_bits(gb, 16); |
| skip_bits(gb, 16); |
| } else if (hash_type == 2) { |
| // picture_checksum = get_bits_long(gb, 32); |
| skip_bits(gb, 32); |
| } |
| } |
| return 0; |
| } |
| |
| static int decode_nal_sei_mastering_display_info(HEVCContext *s) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| int i; |
| // Mastering primaries |
| for (i = 0; i < 3; i++) { |
| s->display_primaries[i][0] = get_bits(gb, 16); |
| s->display_primaries[i][1] = get_bits(gb, 16); |
| } |
| // White point (x, y) |
| s->white_point[0] = get_bits(gb, 16); |
| s->white_point[1] = get_bits(gb, 16); |
| |
| // Max and min luminance of mastering display |
| s->max_mastering_luminance = get_bits_long(gb, 32); |
| s->min_mastering_luminance = get_bits_long(gb, 32); |
| |
| // As this SEI message comes before the first frame that references it, |
| // initialize the flag to 2 and decrement on IRAP access unit so it |
| // persists for the coded video sequence (e.g., between two IRAPs) |
| s->sei_mastering_display_info_present = 2; |
| return 0; |
| } |
| |
| static int decode_nal_sei_frame_packing_arrangement(HEVCContext *s) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| get_ue_golomb_long(gb); // frame_packing_arrangement_id |
| s->sei_frame_packing_present = !get_bits1(gb); |
| |
| if (s->sei_frame_packing_present) { |
| s->frame_packing_arrangement_type = get_bits(gb, 7); |
| s->quincunx_subsampling = get_bits1(gb); |
| s->content_interpretation_type = get_bits(gb, 6); |
| |
| // the following skips spatial_flipping_flag frame0_flipped_flag |
| // field_views_flag current_frame_is_frame0_flag |
| // frame0_self_contained_flag frame1_self_contained_flag |
| skip_bits(gb, 6); |
| |
| if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5) |
| skip_bits(gb, 16); // frame[01]_grid_position_[xy] |
| skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte |
| skip_bits1(gb); // frame_packing_arrangement_persistance_flag |
| } |
| skip_bits1(gb); // upsampled_aspect_ratio_flag |
| return 0; |
| } |
| |
| static int decode_nal_sei_display_orientation(HEVCContext *s) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| s->sei_display_orientation_present = !get_bits1(gb); |
| |
| if (s->sei_display_orientation_present) { |
| s->sei_hflip = get_bits1(gb); // hor_flip |
| s->sei_vflip = get_bits1(gb); // ver_flip |
| |
| s->sei_anticlockwise_rotation = get_bits(gb, 16); |
| skip_bits1(gb); // display_orientation_persistence_flag |
| } |
| |
| return 0; |
| } |
| |
| static int decode_pic_timing(HEVCContext *s) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| HEVCSPS *sps; |
| |
| if (!s->ps.sps_list[s->active_seq_parameter_set_id]) |
| return(AVERROR(ENOMEM)); |
| sps = (HEVCSPS*)s->ps.sps_list[s->active_seq_parameter_set_id]->data; |
| |
| if (sps->vui.frame_field_info_present_flag) { |
| int pic_struct = get_bits(gb, 4); |
| s->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN; |
| if (pic_struct == 2) { |
| av_log(s->avctx, AV_LOG_DEBUG, "BOTTOM Field\n"); |
| s->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD; |
| } else if (pic_struct == 1) { |
| av_log(s->avctx, AV_LOG_DEBUG, "TOP Field\n"); |
| s->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD; |
| } |
| get_bits(gb, 2); // source_scan_type |
| get_bits(gb, 1); // duplicate_flag |
| } |
| return 1; |
| } |
| |
| static int decode_registered_user_data_closed_caption(HEVCContext *s, int size) |
| { |
| int flag; |
| int user_data_type_code; |
| int cc_count; |
| |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| if (size < 3) |
| return AVERROR(EINVAL); |
| |
| user_data_type_code = get_bits(gb, 8); |
| if (user_data_type_code == 0x3) { |
| skip_bits(gb, 1); // reserved |
| |
| flag = get_bits(gb, 1); // process_cc_data_flag |
| if (flag) { |
| skip_bits(gb, 1); |
| cc_count = get_bits(gb, 5); |
| skip_bits(gb, 8); // reserved |
| size -= 2; |
| |
| if (cc_count && size >= cc_count * 3) { |
| const uint64_t new_size = (s->a53_caption_size + cc_count |
| * UINT64_C(3)); |
| int i, ret; |
| |
| if (new_size > INT_MAX) |
| return AVERROR(EINVAL); |
| |
| /* Allow merging of the cc data from two fields. */ |
| ret = av_reallocp(&s->a53_caption, new_size); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0; i < cc_count; i++) { |
| s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8); |
| s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8); |
| s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8); |
| } |
| skip_bits(gb, 8); // marker_bits |
| } |
| } |
| } else { |
| int i; |
| for (i = 0; i < size - 1; i++) |
| skip_bits(gb, 8); |
| } |
| |
| return 0; |
| } |
| |
| static int decode_nal_sei_user_data_registered_itu_t_t35(HEVCContext *s, int size) |
| { |
| uint32_t country_code; |
| uint32_t user_identifier; |
| |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| if (size < 7) |
| return AVERROR(EINVAL); |
| size -= 7; |
| |
| country_code = get_bits(gb, 8); |
| if (country_code == 0xFF) { |
| skip_bits(gb, 8); |
| size--; |
| } |
| |
| skip_bits(gb, 8); |
| skip_bits(gb, 8); |
| |
| user_identifier = get_bits_long(gb, 32); |
| |
| switch (user_identifier) { |
| case MKBETAG('G', 'A', '9', '4'): |
| return decode_registered_user_data_closed_caption(s, size); |
| default: |
| skip_bits_long(gb, size * 8); |
| break; |
| } |
| return 0; |
| } |
| |
| static int active_parameter_sets(HEVCContext *s) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| int num_sps_ids_minus1; |
| int i; |
| unsigned active_seq_parameter_set_id; |
| |
| get_bits(gb, 4); // active_video_parameter_set_id |
| get_bits(gb, 1); // self_contained_cvs_flag |
| get_bits(gb, 1); // num_sps_ids_minus1 |
| num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1 |
| |
| if (num_sps_ids_minus1 < 0 || num_sps_ids_minus1 > 15) { |
| av_log(s->avctx, AV_LOG_ERROR, "num_sps_ids_minus1 %d invalid\n", num_sps_ids_minus1); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| active_seq_parameter_set_id = get_ue_golomb_long(gb); |
| if (active_seq_parameter_set_id >= MAX_SPS_COUNT) { |
| av_log(s->avctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id); |
| return AVERROR_INVALIDDATA; |
| } |
| s->active_seq_parameter_set_id = active_seq_parameter_set_id; |
| |
| for (i = 1; i <= num_sps_ids_minus1; i++) |
| get_ue_golomb_long(gb); // active_seq_parameter_set_id[i] |
| |
| return 0; |
| } |
| |
| static int decode_nal_sei_prefix(HEVCContext *s, int type, int size) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| switch (type) { |
| case 256: // Mismatched value from HM 8.1 |
| return decode_nal_sei_decoded_picture_hash(s); |
| case SEI_TYPE_FRAME_PACKING: |
| return decode_nal_sei_frame_packing_arrangement(s); |
| case SEI_TYPE_DISPLAY_ORIENTATION: |
| return decode_nal_sei_display_orientation(s); |
| case SEI_TYPE_PICTURE_TIMING: |
| { |
| int ret = decode_pic_timing(s); |
| av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type); |
| skip_bits(gb, 8 * size); |
| return ret; |
| } |
| case SEI_TYPE_MASTERING_DISPLAY_INFO: |
| return decode_nal_sei_mastering_display_info(s); |
| case SEI_TYPE_ACTIVE_PARAMETER_SETS: |
| active_parameter_sets(s); |
| av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type); |
| return 0; |
| case SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35: |
| return decode_nal_sei_user_data_registered_itu_t_t35(s, size); |
| default: |
| av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type); |
| skip_bits_long(gb, 8 * size); |
| return 0; |
| } |
| } |
| |
| static int decode_nal_sei_suffix(HEVCContext *s, int type, int size) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| switch (type) { |
| case SEI_TYPE_DECODED_PICTURE_HASH: |
| return decode_nal_sei_decoded_picture_hash(s); |
| default: |
| av_log(s->avctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", type); |
| skip_bits_long(gb, 8 * size); |
| return 0; |
| } |
| } |
| |
| static int decode_nal_sei_message(HEVCContext *s) |
| { |
| GetBitContext *gb = &s->HEVClc->gb; |
| |
| int payload_type = 0; |
| int payload_size = 0; |
| int byte = 0xFF; |
| av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n"); |
| |
| while (byte == 0xFF) { |
| byte = get_bits(gb, 8); |
| payload_type += byte; |
| } |
| byte = 0xFF; |
| while (byte == 0xFF) { |
| byte = get_bits(gb, 8); |
| payload_size += byte; |
| } |
| if (s->nal_unit_type == NAL_SEI_PREFIX) { |
| return decode_nal_sei_prefix(s, payload_type, payload_size); |
| } else { /* nal_unit_type == NAL_SEI_SUFFIX */ |
| return decode_nal_sei_suffix(s, payload_type, payload_size); |
| } |
| return 1; |
| } |
| |
| static int more_rbsp_data(GetBitContext *gb) |
| { |
| return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80; |
| } |
| |
| int ff_hevc_decode_nal_sei(HEVCContext *s) |
| { |
| int ret; |
| |
| do { |
| ret = decode_nal_sei_message(s); |
| if (ret < 0) |
| return(AVERROR(ENOMEM)); |
| } while (more_rbsp_data(&s->HEVClc->gb)); |
| return 1; |
| } |
