X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fh264_sei.c;h=33230b7dfa9f5f7380fda33edf110064fbb346dc;hb=436ced244fadcde2c0b925627920e84b25482542;hp=850060875d44297b6cd93d8351a1e9f94324bf12;hpb=e1c9d266a2dc7d62bf57f986b288a7e15c865d0e;p=ffmpeg diff --git a/libavcodec/h264_sei.c b/libavcodec/h264_sei.c index 850060875d4..33230b7dfa9 100644 --- a/libavcodec/h264_sei.c +++ b/libavcodec/h264_sei.c @@ -2,158 +2,172 @@ * H.26L/H.264/AVC/JVT/14496-10/... sei decoding * Copyright (c) 2003 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file libavcodec/h264-sei.c + * @file * H.264 / AVC / MPEG4 part10 sei decoding. * @author Michael Niedermayer */ -#include "internal.h" #include "avcodec.h" -#include "h264.h" #include "golomb.h" +#include "h264.h" +#include "internal.h" -//#undef NDEBUG -#include - -static const uint8_t sei_num_clock_ts_table[9]={ - 1, 1, 1, 2, 2, 3, 3, 2, 3 +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) { +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; + h->sei_display_orientation_present = 0; } -static int decode_picture_timing(H264Context *h){ - MpegEncContext * const s = &h->s; - if(h->sps.nal_hrd_parameters_present_flag || h->sps.vcl_hrd_parameters_present_flag){ - h->sei_cpb_removal_delay = get_bits(&s->gb, h->sps.cpb_removal_delay_length); - h->sei_dpb_output_delay = get_bits(&s->gb, h->sps.dpb_output_delay_length); +static int decode_picture_timing(H264Context *h) +{ + if (h->sps.nal_hrd_parameters_present_flag || + h->sps.vcl_hrd_parameters_present_flag) { + h->sei_cpb_removal_delay = get_bits(&h->gb, + h->sps.cpb_removal_delay_length); + h->sei_dpb_output_delay = get_bits(&h->gb, + h->sps.dpb_output_delay_length); } - if(h->sps.pic_struct_present_flag){ + if (h->sps.pic_struct_present_flag) { unsigned int i, num_clock_ts; - h->sei_pic_struct = get_bits(&s->gb, 4); + + 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 -1; + 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(&s->gb, 1)){ /* clock_timestamp_flag */ + 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<gb, 2); - skip_bits(&s->gb, 1); /* nuit_field_based_flag */ - skip_bits(&s->gb, 5); /* counting_type */ - full_timestamp_flag = get_bits(&s->gb, 1); - skip_bits(&s->gb, 1); /* discontinuity_flag */ - skip_bits(&s->gb, 1); /* cnt_dropped_flag */ - skip_bits(&s->gb, 8); /* n_frames */ - if(full_timestamp_flag){ - skip_bits(&s->gb, 6); /* seconds_value 0..59 */ - skip_bits(&s->gb, 6); /* minutes_value 0..59 */ - skip_bits(&s->gb, 5); /* hours_value 0..23 */ - }else{ - if(get_bits(&s->gb, 1)){ /* seconds_flag */ - skip_bits(&s->gb, 6); /* seconds_value range 0..59 */ - if(get_bits(&s->gb, 1)){ /* minutes_flag */ - skip_bits(&s->gb, 6); /* minutes_value 0..59 */ - if(get_bits(&s->gb, 1)) /* hours_flag */ - skip_bits(&s->gb, 5); /* hours_value 0..23 */ + + 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(h->sps.time_offset_length > 0) - skip_bits(&s->gb, h->sps.time_offset_length); /* time_offset */ + if (h->sps.time_offset_length > 0) + skip_bits(&h->gb, + h->sps.time_offset_length); /* time_offset */ } } - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n", h->sei_ct_type, h->sei_pic_struct); + 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_unregistered_user_data(H264Context *h, int size){ - MpegEncContext * const s = &h->s; - uint8_t user_data[16+256]; +static int decode_unregistered_user_data(H264Context *h, int size) +{ + uint8_t user_data[16 + 256]; int e, build, i; - if(size<16) - return -1; + if (size < 16) + return AVERROR_INVALIDDATA; - for(i=0; igb, 8); - } + 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"/*%s - H.264/MPEG-4 AVC codec - Copyleft 2005 - http://www.videolan.org/x264.html*/, &build); - if(e==1 && build>0) - h->x264_build= build; + user_data[i] = 0; + e = sscanf(user_data + 16, "x264 - core %d", &build); + if (e == 1 && build > 0) + h->x264_build = build; - if(s->avctx->debug & FF_DEBUG_BUGS) - av_log(s->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data+16); + if (h->avctx->debug & FF_DEBUG_BUGS) + av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16); - for(; igb, 8); + for (; i < size; i++) + skip_bits(&h->gb, 8); return 0; } -static int decode_recovery_point(H264Context *h){ - MpegEncContext * const s = &h->s; +static int decode_recovery_point(H264Context *h) +{ + h->sei_recovery_frame_cnt = get_ue_golomb(&h->gb); - h->sei_recovery_frame_cnt = get_ue_golomb(&s->gb); - skip_bits(&s->gb, 4); /* 1b exact_match_flag, 1b broken_link_flag, 2b changing_slice_group_idc */ + /* 1b exact_match_flag, + * 1b broken_link_flag, + * 2b changing_slice_group_idc */ + skip_bits(&h->gb, 4); return 0; } -static int decode_buffering_period(H264Context *h){ - MpegEncContext * const s = &h->s; +static int decode_buffering_period(H264Context *h) +{ unsigned int sps_id; int sched_sel_idx; SPS *sps; - sps_id = get_ue_golomb_31(&s->gb); - if(sps_id > 31 || !h->sps_buffers[sps_id]) { - av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %d referenced in buffering period\n", sps_id); - return -1; + 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(&s->gb, sps->initial_cpb_removal_delay_length); - skip_bits(&s->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset + h->initial_cpb_removal_delay[sched_sel_idx] = + get_bits(&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(&s->gb, sps->initial_cpb_removal_delay_length); - skip_bits(&s->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset + h->initial_cpb_removal_delay[sched_sel_idx] = + get_bits(&h->gb, sps->initial_cpb_removal_delay_length); + // initial_cpb_removal_delay_offset + skip_bits(&h->gb, sps->initial_cpb_removal_delay_length); } } @@ -161,45 +175,106 @@ static int decode_buffering_period(H264Context *h){ return 0; } -int ff_h264_decode_sei(H264Context *h){ - MpegEncContext * const s = &h->s; +static int decode_frame_packing_arrangement(H264Context *h) +{ + get_ue_golomb(&h->gb); // frame_packing_arrangement_id + h->sei_frame_packing_present = !get_bits1(&h->gb); + + if (h->sei_frame_packing_present) { + h->frame_packing_arrangement_type = get_bits(&h->gb, 7); + h->quincunx_subsampling = get_bits1(&h->gb); + 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 + get_ue_golomb(&h->gb); // frame_packing_arrangement_repetition_period + } + skip_bits1(&h->gb); // frame_packing_arrangement_extension_flag + + return 0; +} + +static int decode_display_orientation(H264Context *h) +{ + h->sei_display_orientation_present = !get_bits1(&h->gb); - while(get_bits_count(&s->gb) + 16 < s->gb.size_in_bits){ - int size, type; + if (h->sei_display_orientation_present) { + h->sei_hflip = get_bits1(&h->gb); // hor_flip + h->sei_vflip = get_bits1(&h->gb); // ver_flip - type=0; - do{ - type+= show_bits(&s->gb, 8); - }while(get_bits(&s->gb, 8) == 255); + h->sei_anticlockwise_rotation = get_bits(&h->gb, 16); + get_ue_golomb(&h->gb); // display_orientation_repetition_period + skip_bits1(&h->gb); // display_orientation_extension_flag + } + + return 0; +} - size=0; - do{ - size+= show_bits(&s->gb, 8); - }while(get_bits(&s->gb, 8) == 255); +int ff_h264_decode_sei(H264Context *h) +{ + while (get_bits_left(&h->gb) > 16) { + int size = 0; + int type = 0; + int ret = 0; - switch(type){ + do + type += show_bits(&h->gb, 8); + while (get_bits(&h->gb, 8) == 255); + + do + size += show_bits(&h->gb, 8); + while (get_bits(&h->gb, 8) == 255); + + if (size > get_bits_left(&h->gb) / 8) { + av_log(h->avctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n", + type, get_bits_left(&h->gb)); + return AVERROR_INVALIDDATA; + } + + switch (type) { case SEI_TYPE_PIC_TIMING: // Picture timing SEI - if(decode_picture_timing(h) < 0) - return -1; + ret = decode_picture_timing(h); + if (ret < 0) + return ret; break; case SEI_TYPE_USER_DATA_UNREGISTERED: - if(decode_unregistered_user_data(h, size) < 0) - return -1; + ret = decode_unregistered_user_data(h, size); + if (ret < 0) + return ret; break; case SEI_TYPE_RECOVERY_POINT: - if(decode_recovery_point(h) < 0) - return -1; + ret = decode_recovery_point(h); + if (ret < 0) + return ret; + break; + case SEI_TYPE_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; - case SEI_BUFFERING_PERIOD: - if(decode_buffering_period(h) < 0) - return -1; + case SEI_TYPE_DISPLAY_ORIENTATION: + ret = decode_display_orientation(h); + if (ret < 0) + return ret; break; default: - skip_bits(&s->gb, 8*size); + av_log(h->avctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type); + skip_bits(&h->gb, 8 * size); } - //FIXME check bits here - align_get_bits(&s->gb); + // FIXME check bits here + align_get_bits(&h->gb); } return 0;