diff options
Diffstat (limited to 'libavcodec/hevc_sei.c')
-rw-r--r-- | libavcodec/hevc_sei.c | 227 |
1 files changed, 209 insertions, 18 deletions
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c index 17cef6743d..148f246df1 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -5,20 +5,20 @@ * Copyright (C) 2012 - 2013 Gildas Cocherel * Copyright (C) 2013 Vittorio Giovara * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -56,10 +56,13 @@ enum HEVC_SEI_TYPE { static int decode_nal_sei_decoded_picture_hash(HEVCContext *s) { int cIdx, i; - GetBitContext *gb = &s->HEVClc.gb; - uint8_t hash_type = get_bits(gb, 8); + 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; cIdx++) { + 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++) @@ -68,18 +71,42 @@ static int decode_nal_sei_decoded_picture_hash(HEVCContext *s) // picture_crc = get_bits(gb, 16); skip_bits(gb, 16); } else if (hash_type == 2) { - // picture_checksum = get_bits(gb, 32); + // 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; + GetBitContext *gb = &s->HEVClc->gb; - get_ue_golomb(gb); // frame_packing_arrangement_id + get_ue_golomb_long(gb); // frame_packing_arrangement_id s->sei_frame_packing_present = !get_bits1(gb); if (s->sei_frame_packing_present) { @@ -103,7 +130,7 @@ static int decode_nal_sei_frame_packing_arrangement(HEVCContext *s) static int decode_nal_sei_display_orientation(HEVCContext *s) { - GetBitContext *gb = &s->HEVClc.gb; + GetBitContext *gb = &s->HEVClc->gb; s->sei_display_orientation_present = !get_bits1(gb); @@ -118,9 +145,148 @@ static int decode_nal_sei_display_orientation(HEVCContext *s) 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; + GetBitContext *gb = &s->HEVClc->gb; switch (type) { case 256: // Mismatched value from HM 8.1 @@ -129,6 +295,21 @@ static int decode_nal_sei_prefix(HEVCContext *s, int type, int size) 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); @@ -138,7 +319,7 @@ static int decode_nal_sei_prefix(HEVCContext *s, int type, int size) static int decode_nal_sei_suffix(HEVCContext *s, int type, int size) { - GetBitContext *gb = &s->HEVClc.gb; + GetBitContext *gb = &s->HEVClc->gb; switch (type) { case SEI_TYPE_DECODED_PICTURE_HASH: @@ -152,7 +333,7 @@ static int decode_nal_sei_suffix(HEVCContext *s, int type, int size) static int decode_nal_sei_message(HEVCContext *s) { - GetBitContext *gb = &s->HEVClc.gb; + GetBitContext *gb = &s->HEVClc->gb; int payload_type = 0; int payload_size = 0; @@ -173,7 +354,7 @@ static int decode_nal_sei_message(HEVCContext *s) } else { /* nal_unit_type == NAL_SEI_SUFFIX */ return decode_nal_sei_suffix(s, payload_type, payload_size); } - return 0; + return 1; } static int more_rbsp_data(GetBitContext *gb) @@ -183,8 +364,18 @@ static int more_rbsp_data(GetBitContext *gb) int ff_hevc_decode_nal_sei(HEVCContext *s) { + int ret; + do { - decode_nal_sei_message(s); - } while (more_rbsp_data(&s->HEVClc.gb)); - return 0; + ret = decode_nal_sei_message(s); + if (ret < 0) + return(AVERROR(ENOMEM)); + } while (more_rbsp_data(&s->HEVClc->gb)); + return 1; +} + +void ff_hevc_reset_sei(HEVCContext *s) +{ + s->a53_caption_size = 0; + av_freep(&s->a53_caption); } |