FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/h264_sei.c	Lines:	194	305	63.6 %
Date:	2021-04-20 15:25:36	Branches:	86	163	52.8 %


/*
 * 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 "atsc_a53.h"
#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;

    av_buffer_unref(&h->a53_caption.buf_ref);
    for (int i = 0; i < h->unregistered.nb_buf_ref; i++)
        av_buffer_unref(&h->unregistered.buf_ref[i]);
    h->unregistered.nb_buf_ref = 0;
    av_freep(&h->unregistered.buf_ref);
}

int ff_h264_sei_process_picture_timing(H264SEIPictureTiming *h, const SPS *sps,
                                       void *logctx)
{
    GetBitContext gb;

    init_get_bits(&gb, h->payload, h->payload_size_bits);

    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];
        h->timecode_cnt = 0;
        for (i = 0; i < num_clock_ts; i++) {
            if (get_bits(&gb, 1)) {                      /* clock_timestamp_flag */
                H264SEITimeCode *tc = &h->timecode[h->timecode_cnt++];
                unsigned int full_timestamp_flag;
                unsigned int counting_type, cnt_dropped_flag;
                h->ct_type |= 1 << get_bits(&gb, 2);
                skip_bits(&gb, 1);                       /* nuit_field_based_flag */
                counting_type = get_bits(&gb, 5);        /* counting_type */
                full_timestamp_flag = get_bits(&gb, 1);
                skip_bits(&gb, 1);                       /* discontinuity_flag */
                cnt_dropped_flag = get_bits(&gb, 1);      /* cnt_dropped_flag */
                if (cnt_dropped_flag && counting_type > 1 && counting_type < 7)
                    tc->dropframe = 1;
                tc->frame = get_bits(&gb, 8);         /* n_frames */
                if (full_timestamp_flag) {
                    tc->full = 1;
                    tc->seconds = get_bits(&gb, 6); /* seconds_value 0..59 */
                    tc->minutes = get_bits(&gb, 6); /* minutes_value 0..59 */
                    tc->hours = get_bits(&gb, 5);   /* hours_value 0..23 */
                } else {
                    tc->seconds = tc->minutes = tc->hours = tc->full = 0;
                    if (get_bits(&gb, 1)) {             /* seconds_flag */
                        tc->seconds = get_bits(&gb, 6);
                        if (get_bits(&gb, 1)) {         /* minutes_flag */
                            tc->minutes = get_bits(&gb, 6);
                            if (get_bits(&gb, 1))       /* hours_flag */
                                tc->hours = get_bits(&gb, 5);
                        }
                    }
                }

                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);
    }

    return 0;
}

static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb,
                                 void *logctx)
{
    int index     = get_bits_count(gb);
    int size_bits = get_bits_left(gb);
    int size      = (size_bits + 7) / 8;

    if (index & 7) {
        av_log(logctx, AV_LOG_ERROR, "Unaligned SEI payload\n");
        return AVERROR_INVALIDDATA;
    }
    if (size > sizeof(h->payload)) {
        av_log(logctx, AV_LOG_ERROR, "Picture timing SEI payload too large\n");
        return AVERROR_INVALIDDATA;
    }
    memcpy(h->payload, gb->buffer + index / 8, size);

    h->payload_size_bits = size_bits;

    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)
{
    if (size < 3)
        return AVERROR(EINVAL);

    return ff_parse_a53_cc(&h->buf_ref, gb->buffer + get_bits_count(gb) / 8, size);
}

static int decode_registered_user_data(H264SEIContext *h, GetBitContext *gb,
                                       void *logctx, int size)
{
    int country_code, provider_code;

    if (size < 3)
        return AVERROR_INVALIDDATA;
    size -= 3;

    country_code = get_bits(gb, 8); // itu_t_t35_country_code
    if (country_code == 0xFF) {
        if (size < 1)
            return AVERROR_INVALIDDATA;

        skip_bits(gb, 8);           // itu_t_t35_country_code_extension_byte
        size--;
    }

    if (country_code != 0xB5) { // usa_country_code
        av_log(logctx, AV_LOG_VERBOSE,
               "Unsupported User Data Registered ITU-T T35 SEI message (country_code = %d)\n",
               country_code);
        return 0;
    }

    /* itu_t_t35_payload_byte follows */
    provider_code = get_bits(gb, 16);

    switch (provider_code) {
    case 0x31: { // atsc_provider_code
        uint32_t user_identifier;

        if (size < 4)
            return AVERROR_INVALIDDATA;
        size -= 4;

        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:
            av_log(logctx, AV_LOG_VERBOSE,
                   "Unsupported User Data Registered ITU-T T35 SEI message (atsc user_identifier = 0x%04x)\n",
                   user_identifier);
            break;
        }
        break;
    }
    default:
        av_log(logctx, AV_LOG_VERBOSE,
               "Unsupported User Data Registered ITU-T T35 SEI message (provider_code = %d)\n",
               provider_code);
        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;
    AVBufferRef *buf_ref, **tmp;

    if (size < 16 || size >= INT_MAX - 1)
        return AVERROR_INVALIDDATA;

    tmp = av_realloc_array(h->buf_ref, h->nb_buf_ref + 1, sizeof(*h->buf_ref));
    if (!tmp)
        return AVERROR(ENOMEM);
    h->buf_ref = tmp;

    buf_ref = av_buffer_alloc(size + 1);
    if (!buf_ref)
        return AVERROR(ENOMEM);
    user_data = buf_ref->data;

    for (i = 0; i < size; i++)
        user_data[i] = get_bits(gb, 8);

    user_data[i] = 0;
    buf_ref->size = size;
    h->buf_ref[h->nb_buf_ref++] = buf_ref;

    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;

    return 0;
}

static int decode_recovery_point(H264SEIRecoveryPoint *h, GetBitContext *gb, void *logctx)
{
    unsigned recovery_frame_cnt = get_ue_golomb_long(gb);

    if (recovery_frame_cnt >= (1<<MAX_LOG2_MAX_FRAME_NUM)) {
        av_log(logctx, AV_LOG_ERROR, "recovery_frame_cnt %u is out of range\n", recovery_frame_cnt);
        return AVERROR_INVALIDDATA;
    }

    h->recovery_frame_cnt = recovery_frame_cnt;
    /* 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->arrangement_id          = get_ue_golomb_long(gb);
    h->arrangement_cancel_flag = get_bits1(gb);
    h->present = !h->arrangement_cancel_flag;

    if (h->present) {
        h->arrangement_type = get_bits(gb, 7);
        h->quincunx_sampling_flag         = get_bits1(gb);
        h->content_interpretation_type    = get_bits(gb, 6);

        // spatial_flipping_flag, frame0_flipped_flag, field_views_flag
        skip_bits(gb, 3);
        h->current_frame_is_frame0_flag = get_bits1(gb);
        // frame0_self_contained_flag, frame1_self_contained_flag
        skip_bits(gb, 2);

        if (!h->quincunx_sampling_flag && h->arrangement_type != 5)
            skip_bits(gb, 16);      // frame[01]_grid_position_[xy]
        skip_bits(gb, 8);           // frame_packing_arrangement_reserved_byte
        h->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)) {
        GetBitContext gb_payload;
        int type = 0;
        unsigned size = 0;
        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;
        }

        ret = init_get_bits8(&gb_payload, gb->buffer + get_bits_count(gb) / 8, size);
        if (ret < 0)
            return ret;

        switch (type) {
        case SEI_TYPE_PIC_TIMING: // Picture timing SEI
            ret = decode_picture_timing(&h->picture_timing, &gb_payload, logctx);
            break;
        case SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
            ret = decode_registered_user_data(h, &gb_payload, logctx, size);
            break;
        case SEI_TYPE_USER_DATA_UNREGISTERED:
            ret = decode_unregistered_user_data(&h->unregistered, &gb_payload, logctx, size);
            break;
        case SEI_TYPE_RECOVERY_POINT:
            ret = decode_recovery_point(&h->recovery_point, &gb_payload, logctx);
            break;
        case SEI_TYPE_BUFFERING_PERIOD:
            ret = decode_buffering_period(&h->buffering_period, &gb_payload, ps, logctx);
            break;
        case SEI_TYPE_FRAME_PACKING_ARRANGEMENT:
            ret = decode_frame_packing_arrangement(&h->frame_packing, &gb_payload);
            break;
        case SEI_TYPE_DISPLAY_ORIENTATION:
            ret = decode_display_orientation(&h->display_orientation, &gb_payload);
            break;
        case SEI_TYPE_GREEN_METADATA:
            ret = decode_green_metadata(&h->green_metadata, &gb_payload);
            break;
        case SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
            ret = decode_alternative_transfer(&h->alternative_transfer, &gb_payload);
            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;

        if (get_bits_left(&gb_payload) < 0) {
            av_log(logctx, AV_LOG_WARNING, "SEI type %d overread by %d bits\n",
                   type, -get_bits_left(&gb_payload));
        }

        skip_bits_long(gb, 8 * size);
    }

    return master_ret;
}

const char *ff_h264_sei_stereo_mode(const H264SEIFramePacking *h)
{
    if (h->arrangement_cancel_flag == 0) {
        switch (h->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->arrangement_cancel_flag == 1) {
        return "mono";
    } else {
        return NULL;
    }
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* H.26L/H.264/AVC/JVT/14496-10/... SEI decoding
3			* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* H.264 / AVC / MPEG-4 part10 SEI decoding.
25			* @author Michael Niedermayer <michaelni@gmx.at>
26			*/
27
28			#include "atsc_a53.h"
29			#include "avcodec.h"
30			#include "get_bits.h"
31			#include "golomb.h"
32			#include "h264_ps.h"
33			#include "h264_sei.h"
34			#include "internal.h"
35
36			#define AVERROR_PS_NOT_FOUND FFERRTAG(0xF8,'?','P','S')
37
38			static const uint8_t sei_num_clock_ts_table[9] = {
39			1, 1, 1, 2, 2, 3, 3, 2, 3
40			};
41
42		51336	void ff_h264_sei_uninit(H264SEIContext *h)
43			{
44		51336	h->recovery_point.recovery_frame_cnt = -1;
45
46		51336	h->picture_timing.dpb_output_delay = 0;
47		51336	h->picture_timing.cpb_removal_delay = -1;
48
49		51336	h->picture_timing.present = 0;
50		51336	h->buffering_period.present = 0;
51		51336	h->frame_packing.present = 0;
52		51336	h->display_orientation.present = 0;
53		51336	h->afd.present = 0;
54
55		51336	av_buffer_unref(&h->a53_caption.buf_ref);
56	✓✓	51420	for (int i = 0; i < h->unregistered.nb_buf_ref; i++)
57		84	av_buffer_unref(&h->unregistered.buf_ref[i]);
58		51336	h->unregistered.nb_buf_ref = 0;
59		51336	av_freep(&h->unregistered.buf_ref);
60		51336	}
61
62		3086	int ff_h264_sei_process_picture_timing(H264SEIPictureTiming h, const SPS sps,
63			void *logctx)
64			{
65			GetBitContext gb;
66
67		3086	init_get_bits(&gb, h->payload, h->payload_size_bits);
68
69	✓✓	3086	if (sps->nal_hrd_parameters_present_flag \|\|
70	✗✓	1805	sps->vcl_hrd_parameters_present_flag) {
71		1281	h->cpb_removal_delay = get_bits_long(&gb, sps->cpb_removal_delay_length);
72		1281	h->dpb_output_delay = get_bits_long(&gb, sps->dpb_output_delay_length);
73			}
74	✓✓	3086	if (sps->pic_struct_present_flag) {
75			unsigned int i, num_clock_ts;
76
77		3066	h->pic_struct = get_bits(&gb, 4);
78		3066	h->ct_type = 0;
79
80	✗✓	3066	if (h->pic_struct > H264_SEI_PIC_STRUCT_FRAME_TRIPLING)
81			return AVERROR_INVALIDDATA;
82
83		3066	num_clock_ts = sei_num_clock_ts_table[h->pic_struct];
84		3066	h->timecode_cnt = 0;
85	✓✓	8086	for (i = 0; i < num_clock_ts; i++) {
86	✓✓	5020	if (get_bits(&gb, 1)) { /* clock_timestamp_flag */
87		1552	H264SEITimeCode *tc = &h->timecode[h->timecode_cnt++];
88			unsigned int full_timestamp_flag;
89			unsigned int counting_type, cnt_dropped_flag;
90		1552	h->ct_type \|= 1 << get_bits(&gb, 2);
91		1552	skip_bits(&gb, 1); /* nuit_field_based_flag */
92		1552	counting_type = get_bits(&gb, 5); /* counting_type */
93		1552	full_timestamp_flag = get_bits(&gb, 1);
94		1552	skip_bits(&gb, 1); /* discontinuity_flag */
95		1552	cnt_dropped_flag = get_bits(&gb, 1); /* cnt_dropped_flag */
96	✗✓✗✗ ✗✗	1552	if (cnt_dropped_flag && counting_type > 1 && counting_type < 7)
97			tc->dropframe = 1;
98		1552	tc->frame = get_bits(&gb, 8); /* n_frames */
99	✓✓	1552	if (full_timestamp_flag) {
100		1202	tc->full = 1;
101		1202	tc->seconds = get_bits(&gb, 6); /* seconds_value 0..59 */
102		1202	tc->minutes = get_bits(&gb, 6); /* minutes_value 0..59 */
103		1202	tc->hours = get_bits(&gb, 5); /* hours_value 0..23 */
104			} else {
105		350	tc->seconds = tc->minutes = tc->hours = tc->full = 0;
106	✓✓	350	if (get_bits(&gb, 1)) { /* seconds_flag */
107		81	tc->seconds = get_bits(&gb, 6);
108	✗✓	81	if (get_bits(&gb, 1)) { /* minutes_flag */
109			tc->minutes = get_bits(&gb, 6);
110			if (get_bits(&gb, 1)) /* hours_flag */
111			tc->hours = get_bits(&gb, 5);
112			}
113			}
114			}
115
116	✓✗	1552	if (sps->time_offset_length > 0)
117		1552	skip_bits(&gb,
118			sps->time_offset_length); /* time_offset */
119			}
120			}
121
122		3066	av_log(logctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n",
123		3066	h->ct_type, h->pic_struct);
124			}
125
126		3086	return 0;
127			}
128
129		3856	static int decode_picture_timing(H264SEIPictureTiming h, GetBitContext gb,
130			void *logctx)
131			{
132		3856	int index = get_bits_count(gb);
133		3856	int size_bits = get_bits_left(gb);
134		3856	int size = (size_bits + 7) / 8;
135
136	✗✓	3856	if (index & 7) {
137			av_log(logctx, AV_LOG_ERROR, "Unaligned SEI payload\n");
138			return AVERROR_INVALIDDATA;
139			}
140	✗✓	3856	if (size > sizeof(h->payload)) {
141			av_log(logctx, AV_LOG_ERROR, "Picture timing SEI payload too large\n");
142			return AVERROR_INVALIDDATA;
143			}
144		3856	memcpy(h->payload, gb->buffer + index / 8, size);
145
146		3856	h->payload_size_bits = size_bits;
147
148		3856	h->present = 1;
149		3856	return 0;
150			}
151
152		863	static int decode_registered_user_data_afd(H264SEIAFD h, GetBitContext gb, int size)
153			{
154			int flag;
155
156	✗✓	863	if (size-- < 1)
157			return AVERROR_INVALIDDATA;
158		863	skip_bits(gb, 1); // 0
159		863	flag = get_bits(gb, 1); // active_format_flag
160		863	skip_bits(gb, 6); // reserved
161
162	✓✗	863	if (flag) {
163	✗✓	863	if (size-- < 1)
164			return AVERROR_INVALIDDATA;
165		863	skip_bits(gb, 4); // reserved
166		863	h->active_format_description = get_bits(gb, 4);
167		863	h->present = 1;
168			}
169
170		863	return 0;
171			}
172
173		6	static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h,
174			GetBitContext gb, void logctx,
175			int size)
176			{
177	✗✓	6	if (size < 3)
178			return AVERROR(EINVAL);
179
180		6	return ff_parse_a53_cc(&h->buf_ref, gb->buffer + get_bits_count(gb) / 8, size);
181			}
182
183		869	static int decode_registered_user_data(H264SEIContext h, GetBitContext gb,
184			void *logctx, int size)
185			{
186			int country_code, provider_code;
187
188	✗✓	869	if (size < 3)
189			return AVERROR_INVALIDDATA;
190		869	size -= 3;
191
192		869	country_code = get_bits(gb, 8); // itu_t_t35_country_code
193	✗✓	869	if (country_code == 0xFF) {
194			if (size < 1)
195			return AVERROR_INVALIDDATA;
196
197			skip_bits(gb, 8); // itu_t_t35_country_code_extension_byte
198			size--;
199			}
200
201	✗✓	869	if (country_code != 0xB5) { // usa_country_code
202			av_log(logctx, AV_LOG_VERBOSE,
203			"Unsupported User Data Registered ITU-T T35 SEI message (country_code = %d)\n",
204			country_code);
205			return 0;
206			}
207
208			/* itu_t_t35_payload_byte follows */
209		869	provider_code = get_bits(gb, 16);
210
211	✓✗	869	switch (provider_code) {
212		869	case 0x31: { // atsc_provider_code
213			uint32_t user_identifier;
214
215	✗✓	869	if (size < 4)
216			return AVERROR_INVALIDDATA;
217		869	size -= 4;
218
219		869	user_identifier = get_bits_long(gb, 32);
220			switch (user_identifier) {
221		863	case MKBETAG('D', 'T', 'G', '1'): // afd_data
222		863	return decode_registered_user_data_afd(&h->afd, gb, size);
223		6	case MKBETAG('G', 'A', '9', '4'): // closed captions
224		6	return decode_registered_user_data_closed_caption(&h->a53_caption, gb,
225			logctx, size);
226			default:
227			av_log(logctx, AV_LOG_VERBOSE,
228			"Unsupported User Data Registered ITU-T T35 SEI message (atsc user_identifier = 0x%04x)\n",
229			user_identifier);
230			break;
231			}
232			break;
233			}
234			default:
235			av_log(logctx, AV_LOG_VERBOSE,
236			"Unsupported User Data Registered ITU-T T35 SEI message (provider_code = %d)\n",
237			provider_code);
238			break;
239			}
240
241			return 0;
242			}
243
244		258	static int decode_unregistered_user_data(H264SEIUnregistered h, GetBitContext gb,
245			void *logctx, int size)
246			{
247			uint8_t *user_data;
248			int e, build, i;
249			AVBufferRef buf_ref, *tmp;
250
251	✓✗✗✓	258	if (size < 16 \|\| size >= INT_MAX - 1)
252			return AVERROR_INVALIDDATA;
253
254		258	tmp = av_realloc_array(h->buf_ref, h->nb_buf_ref + 1, sizeof(*h->buf_ref));
255	✗✓	258	if (!tmp)
256			return AVERROR(ENOMEM);
257		258	h->buf_ref = tmp;
258
259		258	buf_ref = av_buffer_alloc(size + 1);
260	✗✓	258	if (!buf_ref)
261			return AVERROR(ENOMEM);
262		258	user_data = buf_ref->data;
263
264	✓✓	59281	for (i = 0; i < size; i++)
265		59023	user_data[i] = get_bits(gb, 8);
266
267		258	user_data[i] = 0;
268		258	buf_ref->size = size;
269		258	h->buf_ref[h->nb_buf_ref++] = buf_ref;
270
271		258	e = sscanf(user_data + 16, "x264 - core %d", &build);
272	✓✓✓✓	258	if (e == 1 && build > 0)
273		87	h->x264_build = build;
274	✓✓✗✓ ✗✗	258	if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16))
275			h->x264_build = 67;
276
277		258	return 0;
278			}
279
280		76	static int decode_recovery_point(H264SEIRecoveryPoint h, GetBitContext gb, void *logctx)
281			{
282		76	unsigned recovery_frame_cnt = get_ue_golomb_long(gb);
283
284	✗✓	76	if (recovery_frame_cnt >= (1<<MAX_LOG2_MAX_FRAME_NUM)) {
285			av_log(logctx, AV_LOG_ERROR, "recovery_frame_cnt %u is out of range\n", recovery_frame_cnt);
286			return AVERROR_INVALIDDATA;
287			}
288
289		76	h->recovery_frame_cnt = recovery_frame_cnt;
290			/* 1b exact_match_flag,
291			* 1b broken_link_flag,
292			* 2b changing_slice_group_idc */
293		76	skip_bits(gb, 4);
294
295		76	return 0;
296			}
297
298		749	static int decode_buffering_period(H264SEIBufferingPeriod h, GetBitContext gb,
299			const H264ParamSets ps, void logctx)
300			{
301			unsigned int sps_id;
302			int sched_sel_idx;
303			const SPS *sps;
304
305		749	sps_id = get_ue_golomb_31(gb);
306	✓✗✓✓	749	if (sps_id > 31 \|\| !ps->sps_list[sps_id]) {
307		4	av_log(logctx, AV_LOG_ERROR,
308			"non-existing SPS %d referenced in buffering period\n", sps_id);
309	✗✓	4	return sps_id > 31 ? AVERROR_INVALIDDATA : AVERROR_PS_NOT_FOUND;
310			}
311		745	sps = (const SPS*)ps->sps_list[sps_id]->data;
312
313			// NOTE: This is really so duplicated in the standard... See H.264, D.1.1
314	✓✓	745	if (sps->nal_hrd_parameters_present_flag) {
315	✓✓	586	for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
316		293	h->initial_cpb_removal_delay[sched_sel_idx] =
317		293	get_bits_long(gb, sps->initial_cpb_removal_delay_length);
318			// initial_cpb_removal_delay_offset
319		293	skip_bits(gb, sps->initial_cpb_removal_delay_length);
320			}
321			}
322	✓✓	745	if (sps->vcl_hrd_parameters_present_flag) {
323	✓✓	360	for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
324		180	h->initial_cpb_removal_delay[sched_sel_idx] =
325		180	get_bits_long(gb, sps->initial_cpb_removal_delay_length);
326			// initial_cpb_removal_delay_offset
327		180	skip_bits(gb, sps->initial_cpb_removal_delay_length);
328			}
329			}
330
331		745	h->present = 1;
332		745	return 0;
333			}
334
335			static int decode_frame_packing_arrangement(H264SEIFramePacking *h,
336			GetBitContext *gb)
337			{
338			h->arrangement_id = get_ue_golomb_long(gb);
339			h->arrangement_cancel_flag = get_bits1(gb);
340			h->present = !h->arrangement_cancel_flag;
341
342			if (h->present) {
343			h->arrangement_type = get_bits(gb, 7);
344			h->quincunx_sampling_flag = get_bits1(gb);
345			h->content_interpretation_type = get_bits(gb, 6);
346
347			// spatial_flipping_flag, frame0_flipped_flag, field_views_flag
348			skip_bits(gb, 3);
349			h->current_frame_is_frame0_flag = get_bits1(gb);
350			// frame0_self_contained_flag, frame1_self_contained_flag
351			skip_bits(gb, 2);
352
353			if (!h->quincunx_sampling_flag && h->arrangement_type != 5)
354			skip_bits(gb, 16); // frame[01]_grid_position_[xy]
355			skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
356			h->arrangement_repetition_period = get_ue_golomb_long(gb);
357			}
358			skip_bits1(gb); // frame_packing_arrangement_extension_flag
359
360			return 0;
361			}
362
363		2	static int decode_display_orientation(H264SEIDisplayOrientation *h,
364			GetBitContext *gb)
365			{
366		2	h->present = !get_bits1(gb);
367
368	✓✗	2	if (h->present) {
369		2	h->hflip = get_bits1(gb); // hor_flip
370		2	h->vflip = get_bits1(gb); // ver_flip
371
372		2	h->anticlockwise_rotation = get_bits(gb, 16);
373		2	get_ue_golomb_long(gb); // display_orientation_repetition_period
374		2	skip_bits1(gb); // display_orientation_extension_flag
375			}
376
377		2	return 0;
378			}
379
380			static int decode_green_metadata(H264SEIGreenMetaData h, GetBitContext gb)
381			{
382			h->green_metadata_type = get_bits(gb, 8);
383
384			if (h->green_metadata_type == 0) {
385			h->period_type = get_bits(gb, 8);
386
387			if (h->period_type == 2)
388			h->num_seconds = get_bits(gb, 16);
389			else if (h->period_type == 3)
390			h->num_pictures = get_bits(gb, 16);
391
392			h->percent_non_zero_macroblocks = get_bits(gb, 8);
393			h->percent_intra_coded_macroblocks = get_bits(gb, 8);
394			h->percent_six_tap_filtering = get_bits(gb, 8);
395			h->percent_alpha_point_deblocking_instance = get_bits(gb, 8);
396
397			} else if (h->green_metadata_type == 1) {
398			h->xsd_metric_type = get_bits(gb, 8);
399			h->xsd_metric_value = get_bits(gb, 16);
400			}
401
402			return 0;
403			}
404
405			static int decode_alternative_transfer(H264SEIAlternativeTransfer *h,
406			GetBitContext *gb)
407			{
408			h->present = 1;
409			h->preferred_transfer_characteristics = get_bits(gb, 8);
410			return 0;
411			}
412
413		4751	int ff_h264_sei_decode(H264SEIContext h, GetBitContext gb,
414			const H264ParamSets ps, void logctx)
415			{
416		4751	int master_ret = 0;
417
418	✓✓✓✓	10812	while (get_bits_left(gb) > 16 && show_bits(gb, 16)) {
419			GetBitContext gb_payload;
420		6068	int type = 0;
421		6068	unsigned size = 0;
422		6068	int ret = 0;
423
424			do {
425	✗✓	6092	if (get_bits_left(gb) < 8)
426		7	return AVERROR_INVALIDDATA;
427		6092	type += show_bits(gb, 8);
428	✓✓	6092	} while (get_bits(gb, 8) == 255);
429
430			do {
431	✗✓	6244	if (get_bits_left(gb) < 8)
432			return AVERROR_INVALIDDATA;
433		6244	size += show_bits(gb, 8);
434	✓✓	6244	} while (get_bits(gb, 8) == 255);
435
436	✓✓	6068	if (size > get_bits_left(gb) / 8) {
437		7	av_log(logctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n",
438			type, 8*size, get_bits_left(gb));
439		7	return AVERROR_INVALIDDATA;
440			}
441
442		6061	ret = init_get_bits8(&gb_payload, gb->buffer + get_bits_count(gb) / 8, size);
443	✗✓	6061	if (ret < 0)
444			return ret;
445
446	✓✓✓✓ ✓✗✓✗ ✗✓	6061	switch (type) {
447		3856	case SEI_TYPE_PIC_TIMING: // Picture timing SEI
448		3856	ret = decode_picture_timing(&h->picture_timing, &gb_payload, logctx);
449		3856	break;
450		869	case SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
451		869	ret = decode_registered_user_data(h, &gb_payload, logctx, size);
452		869	break;
453		258	case SEI_TYPE_USER_DATA_UNREGISTERED:
454		258	ret = decode_unregistered_user_data(&h->unregistered, &gb_payload, logctx, size);
455		258	break;
456		76	case SEI_TYPE_RECOVERY_POINT:
457		76	ret = decode_recovery_point(&h->recovery_point, &gb_payload, logctx);
458		76	break;
459		749	case SEI_TYPE_BUFFERING_PERIOD:
460		749	ret = decode_buffering_period(&h->buffering_period, &gb_payload, ps, logctx);
461		749	break;
462			case SEI_TYPE_FRAME_PACKING_ARRANGEMENT:
463			ret = decode_frame_packing_arrangement(&h->frame_packing, &gb_payload);
464			break;
465		2	case SEI_TYPE_DISPLAY_ORIENTATION:
466		2	ret = decode_display_orientation(&h->display_orientation, &gb_payload);
467		2	break;
468			case SEI_TYPE_GREEN_METADATA:
469			ret = decode_green_metadata(&h->green_metadata, &gb_payload);
470			break;
471			case SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
472			ret = decode_alternative_transfer(&h->alternative_transfer, &gb_payload);
473			break;
474		251	default:
475		251	av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
476			}
477	✓✓✗✓	6061	if (ret < 0 && ret != AVERROR_PS_NOT_FOUND)
478			return ret;
479	✓✓	6061	if (ret < 0)
480		4	master_ret = ret;
481
482	✓✓	6061	if (get_bits_left(&gb_payload) < 0) {
483		2	av_log(logctx, AV_LOG_WARNING, "SEI type %d overread by %d bits\n",
484		2	type, -get_bits_left(&gb_payload));
485			}
486
487		6061	skip_bits_long(gb, 8 * size);
488			}
489
490		4744	return master_ret;
491			}
492
493		22360	const char ff_h264_sei_stereo_mode(const H264SEIFramePacking h)
494			{
495	✗✓	22360	if (h->arrangement_cancel_flag == 0) {
496			switch (h->arrangement_type) {
497			case H264_SEI_FPA_TYPE_CHECKERBOARD:
498			if (h->content_interpretation_type == 2)
499			return "checkerboard_rl";
500			else
501			return "checkerboard_lr";
502			case H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN:
503			if (h->content_interpretation_type == 2)
504			return "col_interleaved_rl";
505			else
506			return "col_interleaved_lr";
507			case H264_SEI_FPA_TYPE_INTERLEAVE_ROW:
508			if (h->content_interpretation_type == 2)
509			return "row_interleaved_rl";
510			else
511			return "row_interleaved_lr";
512			case H264_SEI_FPA_TYPE_SIDE_BY_SIDE:
513			if (h->content_interpretation_type == 2)
514			return "right_left";
515			else
516			return "left_right";
517			case H264_SEI_FPA_TYPE_TOP_BOTTOM:
518			if (h->content_interpretation_type == 2)
519			return "bottom_top";
520			else
521			return "top_bottom";
522			case H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL:
523			if (h->content_interpretation_type == 2)
524			return "block_rl";
525			else
526			return "block_lr";
527			case H264_SEI_FPA_TYPE_2D:
528			default:
529			return "mono";
530			}
531	✗✓	22360	} else if (h->arrangement_cancel_flag == 1) {
532			return "mono";
533			} else {
534		22360	return NULL;
535			}
536			}