| /* |
| * H.26L/H.264/AVC/JVT/14496-10/... SEI decoding |
| * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * H.264 / AVC / MPEG-4 part10 SEI decoding. |
| * @author Michael Niedermayer <michaelni@gmx.at> |
| */ |
| |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "golomb.h" |
| #include "h264_ps.h" |
| #include "h264_sei.h" |
| #include "internal.h" |
| |
| #define AVERROR_PS_NOT_FOUND FFERRTAG(0xF8,'?','P','S') |
| |
| static const uint8_t sei_num_clock_ts_table[9] = { |
| 1, 1, 1, 2, 2, 3, 3, 2, 3 |
| }; |
| |
| void ff_h264_sei_uninit(H264SEIContext *h) |
| { |
| h->recovery_point.recovery_frame_cnt = -1; |
| |
| h->picture_timing.dpb_output_delay = 0; |
| h->picture_timing.cpb_removal_delay = -1; |
| |
| h->picture_timing.present = 0; |
| h->buffering_period.present = 0; |
| h->frame_packing.present = 0; |
| h->display_orientation.present = 0; |
| h->afd.present = 0; |
| |
| h->a53_caption.a53_caption_size = 0; |
| av_freep(&h->a53_caption.a53_caption); |
| } |
| |
| static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb, |
| const H264ParamSets *ps, void *logctx) |
| { |
| int i; |
| const SPS *sps = ps->sps; |
| |
| for (i = 0; i<MAX_SPS_COUNT; i++) |
| if ((!sps || !sps->log2_max_frame_num) && ps->sps_list[i]) |
| sps = (const SPS *)ps->sps_list[i]->data; |
| |
| if (!sps) { |
| av_log(logctx, AV_LOG_ERROR, "SPS unavailable in decode_picture_timing\n"); |
| return AVERROR_PS_NOT_FOUND; |
| } |
| |
| if (sps->nal_hrd_parameters_present_flag || |
| sps->vcl_hrd_parameters_present_flag) { |
| h->cpb_removal_delay = get_bits_long(gb, sps->cpb_removal_delay_length); |
| h->dpb_output_delay = get_bits_long(gb, sps->dpb_output_delay_length); |
| } |
| if (sps->pic_struct_present_flag) { |
| unsigned int i, num_clock_ts; |
| |
| h->pic_struct = get_bits(gb, 4); |
| h->ct_type = 0; |
| |
| if (h->pic_struct > H264_SEI_PIC_STRUCT_FRAME_TRIPLING) |
| return AVERROR_INVALIDDATA; |
| |
| num_clock_ts = sei_num_clock_ts_table[h->pic_struct]; |
| |
| for (i = 0; i < num_clock_ts; i++) { |
| if (get_bits(gb, 1)) { /* clock_timestamp_flag */ |
| unsigned int full_timestamp_flag; |
| |
| h->ct_type |= 1 << get_bits(gb, 2); |
| skip_bits(gb, 1); /* nuit_field_based_flag */ |
| skip_bits(gb, 5); /* counting_type */ |
| full_timestamp_flag = get_bits(gb, 1); |
| skip_bits(gb, 1); /* discontinuity_flag */ |
| skip_bits(gb, 1); /* cnt_dropped_flag */ |
| skip_bits(gb, 8); /* n_frames */ |
| if (full_timestamp_flag) { |
| skip_bits(gb, 6); /* seconds_value 0..59 */ |
| skip_bits(gb, 6); /* minutes_value 0..59 */ |
| skip_bits(gb, 5); /* hours_value 0..23 */ |
| } else { |
| if (get_bits(gb, 1)) { /* seconds_flag */ |
| skip_bits(gb, 6); /* seconds_value range 0..59 */ |
| if (get_bits(gb, 1)) { /* minutes_flag */ |
| skip_bits(gb, 6); /* minutes_value 0..59 */ |
| if (get_bits(gb, 1)) /* hours_flag */ |
| skip_bits(gb, 5); /* hours_value 0..23 */ |
| } |
| } |
| } |
| if (sps->time_offset_length > 0) |
| skip_bits(gb, |
| sps->time_offset_length); /* time_offset */ |
| } |
| } |
| |
| av_log(logctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n", |
| h->ct_type, h->pic_struct); |
| } |
| |
| h->present = 1; |
| return 0; |
| } |
| |
| static int decode_registered_user_data_afd(H264SEIAFD *h, GetBitContext *gb, int size) |
| { |
| int flag; |
| |
| if (size-- < 1) |
| return AVERROR_INVALIDDATA; |
| skip_bits(gb, 1); // 0 |
| flag = get_bits(gb, 1); // active_format_flag |
| skip_bits(gb, 6); // reserved |
| |
| if (flag) { |
| if (size-- < 1) |
| return AVERROR_INVALIDDATA; |
| skip_bits(gb, 4); // reserved |
| h->active_format_description = get_bits(gb, 4); |
| h->present = 1; |
| } |
| |
| return 0; |
| } |
| |
| static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h, |
| GetBitContext *gb, void *logctx, |
| int size) |
| { |
| int flag; |
| int user_data_type_code; |
| int cc_count; |
| |
| 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); // zero bit |
| 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 = (h->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(&h->a53_caption, new_size); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0; i < cc_count; i++) { |
| h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8); |
| h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8); |
| h->a53_caption[h->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_registered_user_data(H264SEIContext *h, GetBitContext *gb, |
| void *logctx, int size) |
| { |
| uint32_t country_code; |
| uint32_t user_identifier; |
| |
| if (size < 7) |
| return AVERROR_INVALIDDATA; |
| size -= 7; |
| |
| country_code = get_bits(gb, 8); // itu_t_t35_country_code |
| if (country_code == 0xFF) { |
| skip_bits(gb, 8); // itu_t_t35_country_code_extension_byte |
| size--; |
| } |
| |
| /* itu_t_t35_payload_byte follows */ |
| skip_bits(gb, 8); // terminal provider code |
| skip_bits(gb, 8); // terminal provider oriented code |
| user_identifier = get_bits_long(gb, 32); |
| |
| switch (user_identifier) { |
| case MKBETAG('D', 'T', 'G', '1'): // afd_data |
| return decode_registered_user_data_afd(&h->afd, gb, size); |
| case MKBETAG('G', 'A', '9', '4'): // closed captions |
| return decode_registered_user_data_closed_caption(&h->a53_caption, gb, |
| logctx, size); |
| default: |
| skip_bits(gb, size * 8); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int decode_unregistered_user_data(H264SEIUnregistered *h, GetBitContext *gb, |
| void *logctx, int size) |
| { |
| uint8_t *user_data; |
| int e, build, i; |
| |
| if (size < 16 || size >= INT_MAX - 16) |
| return AVERROR_INVALIDDATA; |
| |
| user_data = av_malloc(16 + size + 1); |
| if (!user_data) |
| return AVERROR(ENOMEM); |
| |
| for (i = 0; i < size + 16; i++) |
| user_data[i] = get_bits(gb, 8); |
| |
| user_data[i] = 0; |
| e = sscanf(user_data + 16, "x264 - core %d", &build); |
| if (e == 1 && build > 0) |
| h->x264_build = build; |
| if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16)) |
| h->x264_build = 67; |
| |
| if (strlen(user_data + 16) > 0) |
| av_log(logctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16); |
| |
| av_free(user_data); |
| return 0; |
| } |
| |
| static int decode_recovery_point(H264SEIRecoveryPoint *h, GetBitContext *gb) |
| { |
| h->recovery_frame_cnt = get_ue_golomb_long(gb); |
| |
| /* 1b exact_match_flag, |
| * 1b broken_link_flag, |
| * 2b changing_slice_group_idc */ |
| skip_bits(gb, 4); |
| |
| return 0; |
| } |
| |
| static int decode_buffering_period(H264SEIBufferingPeriod *h, GetBitContext *gb, |
| const H264ParamSets *ps, void *logctx) |
| { |
| unsigned int sps_id; |
| int sched_sel_idx; |
| const SPS *sps; |
| |
| sps_id = get_ue_golomb_31(gb); |
| if (sps_id > 31 || !ps->sps_list[sps_id]) { |
| av_log(logctx, AV_LOG_ERROR, |
| "non-existing SPS %d referenced in buffering period\n", sps_id); |
| return sps_id > 31 ? AVERROR_INVALIDDATA : AVERROR_PS_NOT_FOUND; |
| } |
| sps = (const SPS*)ps->sps_list[sps_id]->data; |
| |
| // NOTE: This is really so duplicated in the standard... See H.264, D.1.1 |
| if (sps->nal_hrd_parameters_present_flag) { |
| for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) { |
| h->initial_cpb_removal_delay[sched_sel_idx] = |
| get_bits_long(gb, sps->initial_cpb_removal_delay_length); |
| // initial_cpb_removal_delay_offset |
| skip_bits(gb, sps->initial_cpb_removal_delay_length); |
| } |
| } |
| if (sps->vcl_hrd_parameters_present_flag) { |
| for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) { |
| h->initial_cpb_removal_delay[sched_sel_idx] = |
| get_bits_long(gb, sps->initial_cpb_removal_delay_length); |
| // initial_cpb_removal_delay_offset |
| skip_bits(gb, sps->initial_cpb_removal_delay_length); |
| } |
| } |
| |
| h->present = 1; |
| return 0; |
| } |
| |
| static int decode_frame_packing_arrangement(H264SEIFramePacking *h, |
| GetBitContext *gb) |
| { |
| h->frame_packing_arrangement_id = get_ue_golomb_long(gb); |
| h->frame_packing_arrangement_cancel_flag = get_bits1(gb); |
| h->present = !h->frame_packing_arrangement_cancel_flag; |
| |
| if (h->present) { |
| h->frame_packing_arrangement_type = get_bits(gb, 7); |
| h->quincunx_sampling_flag = get_bits1(gb); |
| h->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 (!h->quincunx_sampling_flag && h->frame_packing_arrangement_type != 5) |
| skip_bits(gb, 16); // frame[01]_grid_position_[xy] |
| skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte |
| h->frame_packing_arrangement_repetition_period = get_ue_golomb_long(gb); |
| } |
| skip_bits1(gb); // frame_packing_arrangement_extension_flag |
| |
| return 0; |
| } |
| |
| static int decode_display_orientation(H264SEIDisplayOrientation *h, |
| GetBitContext *gb) |
| { |
| h->present = !get_bits1(gb); |
| |
| if (h->present) { |
| h->hflip = get_bits1(gb); // hor_flip |
| h->vflip = get_bits1(gb); // ver_flip |
| |
| h->anticlockwise_rotation = get_bits(gb, 16); |
| get_ue_golomb_long(gb); // display_orientation_repetition_period |
| skip_bits1(gb); // display_orientation_extension_flag |
| } |
| |
| return 0; |
| } |
| |
| static int decode_green_metadata(H264SEIGreenMetaData *h, GetBitContext *gb) |
| { |
| h->green_metadata_type = get_bits(gb, 8); |
| |
| if (h->green_metadata_type == 0) { |
| h->period_type = get_bits(gb, 8); |
| |
| if (h->period_type == 2) |
| h->num_seconds = get_bits(gb, 16); |
| else if (h->period_type == 3) |
| h->num_pictures = get_bits(gb, 16); |
| |
| h->percent_non_zero_macroblocks = get_bits(gb, 8); |
| h->percent_intra_coded_macroblocks = get_bits(gb, 8); |
| h->percent_six_tap_filtering = get_bits(gb, 8); |
| h->percent_alpha_point_deblocking_instance = get_bits(gb, 8); |
| |
| } else if (h->green_metadata_type == 1) { |
| h->xsd_metric_type = get_bits(gb, 8); |
| h->xsd_metric_value = get_bits(gb, 16); |
| } |
| |
| return 0; |
| } |
| |
| static int decode_alternative_transfer(H264SEIAlternativeTransfer *h, |
| GetBitContext *gb) |
| { |
| h->present = 1; |
| h->preferred_transfer_characteristics = get_bits(gb, 8); |
| return 0; |
| } |
| |
| int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, |
| const H264ParamSets *ps, void *logctx) |
| { |
| int master_ret = 0; |
| |
| while (get_bits_left(gb) > 16 && show_bits(gb, 16)) { |
| int type = 0; |
| unsigned size = 0; |
| unsigned next; |
| int ret = 0; |
| |
| do { |
| if (get_bits_left(gb) < 8) |
| return AVERROR_INVALIDDATA; |
| type += show_bits(gb, 8); |
| } while (get_bits(gb, 8) == 255); |
| |
| do { |
| if (get_bits_left(gb) < 8) |
| return AVERROR_INVALIDDATA; |
| size += show_bits(gb, 8); |
| } while (get_bits(gb, 8) == 255); |
| |
| if (size > get_bits_left(gb) / 8) { |
| av_log(logctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n", |
| type, 8*size, get_bits_left(gb)); |
| return AVERROR_INVALIDDATA; |
| } |
| next = get_bits_count(gb) + 8 * size; |
| |
| switch (type) { |
| case H264_SEI_TYPE_PIC_TIMING: // Picture timing SEI |
| ret = decode_picture_timing(&h->picture_timing, gb, ps, logctx); |
| break; |
| case H264_SEI_TYPE_USER_DATA_REGISTERED: |
| ret = decode_registered_user_data(h, gb, logctx, size); |
| break; |
| case H264_SEI_TYPE_USER_DATA_UNREGISTERED: |
| ret = decode_unregistered_user_data(&h->unregistered, gb, logctx, size); |
| break; |
| case H264_SEI_TYPE_RECOVERY_POINT: |
| ret = decode_recovery_point(&h->recovery_point, gb); |
| break; |
| case H264_SEI_TYPE_BUFFERING_PERIOD: |
| ret = decode_buffering_period(&h->buffering_period, gb, ps, logctx); |
| break; |
| case H264_SEI_TYPE_FRAME_PACKING: |
| ret = decode_frame_packing_arrangement(&h->frame_packing, gb); |
| break; |
| case H264_SEI_TYPE_DISPLAY_ORIENTATION: |
| ret = decode_display_orientation(&h->display_orientation, gb); |
| break; |
| case H264_SEI_TYPE_GREEN_METADATA: |
| ret = decode_green_metadata(&h->green_metadata, gb); |
| break; |
| case H264_SEI_TYPE_ALTERNATIVE_TRANSFER: |
| ret = decode_alternative_transfer(&h->alternative_transfer, gb); |
| break; |
| default: |
| av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type); |
| } |
| if (ret < 0 && ret != AVERROR_PS_NOT_FOUND) |
| return ret; |
| if (ret < 0) |
| master_ret = ret; |
| |
| skip_bits_long(gb, next - get_bits_count(gb)); |
| |
| // FIXME check bits here |
| align_get_bits(gb); |
| } |
| |
| return master_ret; |
| } |
| |
| const char *ff_h264_sei_stereo_mode(const H264SEIFramePacking *h) |
| { |
| if (h->frame_packing_arrangement_cancel_flag == 0) { |
| switch (h->frame_packing_arrangement_type) { |
| case H264_SEI_FPA_TYPE_CHECKERBOARD: |
| if (h->content_interpretation_type == 2) |
| return "checkerboard_rl"; |
| else |
| return "checkerboard_lr"; |
| case H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN: |
| if (h->content_interpretation_type == 2) |
| return "col_interleaved_rl"; |
| else |
| return "col_interleaved_lr"; |
| case H264_SEI_FPA_TYPE_INTERLEAVE_ROW: |
| if (h->content_interpretation_type == 2) |
| return "row_interleaved_rl"; |
| else |
| return "row_interleaved_lr"; |
| case H264_SEI_FPA_TYPE_SIDE_BY_SIDE: |
| if (h->content_interpretation_type == 2) |
| return "right_left"; |
| else |
| return "left_right"; |
| case H264_SEI_FPA_TYPE_TOP_BOTTOM: |
| if (h->content_interpretation_type == 2) |
| return "bottom_top"; |
| else |
| return "top_bottom"; |
| case H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL: |
| if (h->content_interpretation_type == 2) |
| return "block_rl"; |
| else |
| return "block_lr"; |
| case H264_SEI_FPA_TYPE_2D: |
| default: |
| return "mono"; |
| } |
| } else if (h->frame_packing_arrangement_cancel_flag == 1) { |
| return "mono"; |
| } else { |
| return NULL; |
| } |
| } |
