diff options
Diffstat (limited to 'ffmpeg/libavcodec/h264_sei.c')
| -rw-r--r-- | ffmpeg/libavcodec/h264_sei.c | 380 |
1 files changed, 0 insertions, 380 deletions
diff --git a/ffmpeg/libavcodec/h264_sei.c b/ffmpeg/libavcodec/h264_sei.c deleted file mode 100644 index 12d709b..0000000 --- a/ffmpeg/libavcodec/h264_sei.c +++ /dev/null @@ -1,380 +0,0 @@ -/* - * 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 / MPEG4 part10 sei decoding. - * @author Michael Niedermayer <michaelni@gmx.at> - */ - -#include "internal.h" -#include "avcodec.h" -#include "h264.h" -#include "golomb.h" - -#include <assert.h> - -static const uint8_t sei_num_clock_ts_table[9] = { - 1, 1, 1, 2, 2, 3, 3, 2, 3 -}; - -void ff_h264_reset_sei(H264Context *h) -{ - h->sei_recovery_frame_cnt = -1; - h->sei_dpb_output_delay = 0; - h->sei_cpb_removal_delay = -1; - h->sei_buffering_period_present = 0; - h->sei_frame_packing_present = 0; -} - -static int decode_picture_timing(H264Context *h) -{ - SPS *sps = &h->sps; - int i; - - for (i = 0; i<MAX_SPS_COUNT; i++) - if (!sps->log2_max_frame_num && h->sps_buffers[i]) - sps = h->sps_buffers[i]; - - if (sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag) { - h->sei_cpb_removal_delay = get_bits_long(&h->gb, - sps->cpb_removal_delay_length); - h->sei_dpb_output_delay = get_bits_long(&h->gb, - sps->dpb_output_delay_length); - } - if (sps->pic_struct_present_flag) { - unsigned int i, num_clock_ts; - - h->sei_pic_struct = get_bits(&h->gb, 4); - h->sei_ct_type = 0; - - if (h->sei_pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING) - return AVERROR_INVALIDDATA; - - num_clock_ts = sei_num_clock_ts_table[h->sei_pic_struct]; - - for (i = 0; i < num_clock_ts; i++) { - if (get_bits(&h->gb, 1)) { /* clock_timestamp_flag */ - unsigned int full_timestamp_flag; - - h->sei_ct_type |= 1 << get_bits(&h->gb, 2); - skip_bits(&h->gb, 1); /* nuit_field_based_flag */ - skip_bits(&h->gb, 5); /* counting_type */ - full_timestamp_flag = get_bits(&h->gb, 1); - skip_bits(&h->gb, 1); /* discontinuity_flag */ - skip_bits(&h->gb, 1); /* cnt_dropped_flag */ - skip_bits(&h->gb, 8); /* n_frames */ - if (full_timestamp_flag) { - skip_bits(&h->gb, 6); /* seconds_value 0..59 */ - skip_bits(&h->gb, 6); /* minutes_value 0..59 */ - skip_bits(&h->gb, 5); /* hours_value 0..23 */ - } else { - if (get_bits(&h->gb, 1)) { /* seconds_flag */ - skip_bits(&h->gb, 6); /* seconds_value range 0..59 */ - if (get_bits(&h->gb, 1)) { /* minutes_flag */ - skip_bits(&h->gb, 6); /* minutes_value 0..59 */ - if (get_bits(&h->gb, 1)) /* hours_flag */ - skip_bits(&h->gb, 5); /* hours_value 0..23 */ - } - } - } - if (sps->time_offset_length > 0) - skip_bits(&h->gb, - sps->time_offset_length); /* time_offset */ - } - } - - if (h->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(h->avctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n", - h->sei_ct_type, h->sei_pic_struct); - } - return 0; -} - -static int decode_user_data_itu_t_t35(H264Context *h, int size) -{ - uint32_t user_identifier; - int dtg_active_format; - - if (size < 7) - return -1; - size -= 7; - - skip_bits(&h->gb, 8); // country_code - skip_bits(&h->gb, 16); // provider_code - user_identifier = get_bits_long(&h->gb, 32); - - switch (user_identifier) { - case 0x44544731: // "DTG1" - AFD_data - if (size < 1) - return -1; - skip_bits(&h->gb, 1); - if (get_bits(&h->gb, 1)) { - skip_bits(&h->gb, 6); - if (size < 2) - return -1; - skip_bits(&h->gb, 4); - dtg_active_format = get_bits(&h->gb, 4); - h->avctx->dtg_active_format = dtg_active_format; - } else { - skip_bits(&h->gb, 6); - } - break; - default: - skip_bits(&h->gb, size * 8); - break; - } - - return 0; -} - -static int decode_unregistered_user_data(H264Context *h, int size) -{ - uint8_t user_data[16 + 256]; - int e, build, i; - - if (size < 16) - return AVERROR_INVALIDDATA; - - for (i = 0; i < sizeof(user_data) - 1 && i < size; i++) - user_data[i] = get_bits(&h->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 (h->avctx->debug & FF_DEBUG_BUGS) - av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16); - - for (; i < size; i++) - skip_bits(&h->gb, 8); - - return 0; -} - -static int decode_recovery_point(H264Context *h) -{ - h->sei_recovery_frame_cnt = get_ue_golomb(&h->gb); - - /* 1b exact_match_flag, - * 1b broken_link_flag, - * 2b changing_slice_group_idc */ - skip_bits(&h->gb, 4); - - if (h->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(h->avctx, AV_LOG_DEBUG, "sei_recovery_frame_cnt: %d\n", h->sei_recovery_frame_cnt); - - return 0; -} - -static int decode_buffering_period(H264Context *h) -{ - unsigned int sps_id; - int sched_sel_idx; - SPS *sps; - - sps_id = get_ue_golomb_31(&h->gb); - if (sps_id > 31 || !h->sps_buffers[sps_id]) { - av_log(h->avctx, AV_LOG_ERROR, - "non-existing SPS %d referenced in buffering period\n", sps_id); - return AVERROR_INVALIDDATA; - } - sps = h->sps_buffers[sps_id]; - - // 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(&h->gb, sps->initial_cpb_removal_delay_length); - // initial_cpb_removal_delay_offset - skip_bits(&h->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(&h->gb, sps->initial_cpb_removal_delay_length); - // initial_cpb_removal_delay_offset - skip_bits(&h->gb, sps->initial_cpb_removal_delay_length); - } - } - - h->sei_buffering_period_present = 1; - return 0; -} - -static int decode_frame_packing_arrangement(H264Context *h) -{ - h->sei_fpa.frame_packing_arrangement_id = get_ue_golomb(&h->gb); - h->sei_fpa.frame_packing_arrangement_cancel_flag = get_bits1(&h->gb); - h->sei_frame_packing_present = !h->sei_fpa.frame_packing_arrangement_cancel_flag; - - if (h->sei_frame_packing_present) { - h->sei_fpa.frame_packing_arrangement_type = - h->frame_packing_arrangement_type = get_bits(&h->gb, 7); - h->sei_fpa.quincunx_sampling_flag = - h->quincunx_subsampling = get_bits1(&h->gb); - h->sei_fpa.content_interpretation_type = - h->content_interpretation_type = get_bits(&h->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(&h->gb, 6); - - if (!h->quincunx_subsampling && h->frame_packing_arrangement_type != 5) - skip_bits(&h->gb, 16); // frame[01]_grid_position_[xy] - skip_bits(&h->gb, 8); // frame_packing_arrangement_reserved_byte - h->sei_fpa.frame_packing_arrangement_repetition_period = get_ue_golomb(&h->gb) /* frame_packing_arrangement_repetition_period */; - } - skip_bits1(&h->gb); // frame_packing_arrangement_extension_flag - - if (h->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(h->avctx, AV_LOG_DEBUG, "SEI FPA %d %d %d %d %d %d\n", - h->sei_fpa.frame_packing_arrangement_id, - h->sei_fpa.frame_packing_arrangement_cancel_flag, - h->sei_fpa.frame_packing_arrangement_type, - h->sei_fpa.quincunx_sampling_flag, - h->sei_fpa.content_interpretation_type, - h->sei_fpa.frame_packing_arrangement_repetition_period); - - return 0; -} - -int ff_h264_decode_sei(H264Context *h) -{ - while (get_bits_left(&h->gb) > 16) { - int type = 0; - unsigned size = 0; - unsigned next; - int ret = 0; - - do { - if (get_bits_left(&h->gb) < 8) - return AVERROR_INVALIDDATA; - type += show_bits(&h->gb, 8); - } while (get_bits(&h->gb, 8) == 255); - - do { - if (get_bits_left(&h->gb) < 8) - return AVERROR_INVALIDDATA; - size += show_bits(&h->gb, 8); - } while (get_bits(&h->gb, 8) == 255); - - if (h->avctx->debug&FF_DEBUG_STARTCODE) - av_log(h->avctx, AV_LOG_DEBUG, "SEI %d len:%d\n", type, size); - - if (size > get_bits_left(&h->gb) / 8) { - av_log(h->avctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n", - type, 8*size, get_bits_left(&h->gb)); - return AVERROR_INVALIDDATA; - } - next = get_bits_count(&h->gb) + 8 * size; - - switch (type) { - case SEI_TYPE_PIC_TIMING: // Picture timing SEI - ret = decode_picture_timing(h); - if (ret < 0) - return ret; - break; - case SEI_TYPE_USER_DATA_ITU_T_T35: - if (decode_user_data_itu_t_t35(h, size) < 0) - return -1; - break; - case SEI_TYPE_USER_DATA_UNREGISTERED: - ret = decode_unregistered_user_data(h, size); - if (ret < 0) - return ret; - break; - case SEI_TYPE_RECOVERY_POINT: - ret = decode_recovery_point(h); - if (ret < 0) - return ret; - break; - case SEI_BUFFERING_PERIOD: - ret = decode_buffering_period(h); - if (ret < 0) - return ret; - break; - case SEI_TYPE_FRAME_PACKING: - ret = decode_frame_packing_arrangement(h); - if (ret < 0) - return ret; - break; - default: - av_log(h->avctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type); - } - skip_bits_long(&h->gb, next - get_bits_count(&h->gb)); - - // FIXME check bits here - align_get_bits(&h->gb); - } - - return 0; -} - -const char* ff_h264_sei_stereo_mode(H264Context *h) -{ - if (h->sei_fpa.frame_packing_arrangement_cancel_flag == 0) { - switch (h->sei_fpa.frame_packing_arrangement_type) { - case SEI_FPA_TYPE_CHECKERBOARD: - if (h->sei_fpa.content_interpretation_type == 2) - return "checkerboard_rl"; - else - return "checkerboard_lr"; - case SEI_FPA_TYPE_INTERLEAVE_COLUMN: - if (h->sei_fpa.content_interpretation_type == 2) - return "col_interleaved_rl"; - else - return "col_interleaved_lr"; - case SEI_FPA_TYPE_INTERLEAVE_ROW: - if (h->sei_fpa.content_interpretation_type == 2) - return "row_interleaved_rl"; - else - return "row_interleaved_lr"; - case SEI_FPA_TYPE_SIDE_BY_SIDE: - if (h->sei_fpa.content_interpretation_type == 2) - return "right_left"; - else - return "left_right"; - case SEI_FPA_TYPE_TOP_BOTTOM: - if (h->sei_fpa.content_interpretation_type == 2) - return "bottom_top"; - else - return "top_bottom"; - case SEI_FPA_TYPE_INTERLEAVE_TEMPORAL: - if (h->sei_fpa.content_interpretation_type == 2) - return "block_rl"; - else - return "block_lr"; - case SEI_FPA_TYPE_2D: - default: - return "mono"; - } - } else if (h->sei_fpa.frame_packing_arrangement_cancel_flag == 1) { - return "mono"; - } else { - return NULL; - } -} |