FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/h264_sei.c	Lines:	191	293	65.2 %
Date:	2020-09-25 23:16:12	Branches:	85	158	53.8 %


/*
 * 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)
{
    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;
    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 H264_SEI_TYPE_PIC_TIMING: // Picture timing SEI
            ret = decode_picture_timing(&h->picture_timing, &gb_payload, logctx);
            break;
        case H264_SEI_TYPE_USER_DATA_REGISTERED:
            ret = decode_registered_user_data(h, &gb_payload, logctx, size);
            break;
        case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
            ret = decode_unregistered_user_data(&h->unregistered, &gb_payload, logctx, size);
            break;
        case H264_SEI_TYPE_RECOVERY_POINT:
            ret = decode_recovery_point(&h->recovery_point, &gb_payload, logctx);
            break;
        case H264_SEI_TYPE_BUFFERING_PERIOD:
            ret = decode_buffering_period(&h->buffering_period, &gb_payload, ps, logctx);
            break;
        case H264_SEI_TYPE_FRAME_PACKING:
            ret = decode_frame_packing_arrangement(&h->frame_packing, &gb_payload);
            break;
        case H264_SEI_TYPE_DISPLAY_ORIENTATION:
            ret = decode_display_orientation(&h->display_orientation, &gb_payload);
            break;
        case H264_SEI_TYPE_GREEN_METADATA:
            ret = decode_green_metadata(&h->green_metadata, &gb_payload);
            break;
        case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
            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		50802	void ff_h264_sei_uninit(H264SEIContext *h)
43			{
44		50802	h->recovery_point.recovery_frame_cnt = -1;
45
46		50802	h->picture_timing.dpb_output_delay = 0;
47		50802	h->picture_timing.cpb_removal_delay = -1;
48
49		50802	h->picture_timing.present = 0;
50		50802	h->buffering_period.present = 0;
51		50802	h->frame_packing.present = 0;
52		50802	h->display_orientation.present = 0;
53		50802	h->afd.present = 0;
54
55		50802	av_buffer_unref(&h->a53_caption.buf_ref);
56	✓✓	50881	for (int i = 0; i < h->unregistered.nb_buf_ref; i++)
57		79	av_buffer_unref(&h->unregistered.buf_ref[i]);
58		50802	h->unregistered.nb_buf_ref = 0;
59		50802	av_freep(&h->unregistered.buf_ref);
60		50802	}
61
62		2766	int ff_h264_sei_process_picture_timing(H264SEIPictureTiming h, const SPS sps,
63			void *logctx)
64			{
65			GetBitContext gb;
66
67		2766	init_get_bits(&gb, h->payload, h->payload_size_bits);
68
69	✓✓	2766	if (sps->nal_hrd_parameters_present_flag \|\|
70	✗✓	1485	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	✓✓	2766	if (sps->pic_struct_present_flag) {
75			unsigned int i, num_clock_ts;
76
77		2746	h->pic_struct = get_bits(&gb, 4);
78		2746	h->ct_type = 0;
79
80	✗✓	2746	if (h->pic_struct > H264_SEI_PIC_STRUCT_FRAME_TRIPLING)
81			return AVERROR_INVALIDDATA;
82
83		2746	num_clock_ts = sei_num_clock_ts_table[h->pic_struct];
84		2746	h->timecode_cnt = 0;
85	✓✓	7446	for (i = 0; i < num_clock_ts; i++) {
86	✓✓	4700	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		2746	av_log(logctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n",
123		2746	h->ct_type, h->pic_struct);
124			}
125
126		2766	return 0;
127			}
128
129		3412	static int decode_picture_timing(H264SEIPictureTiming h, GetBitContext gb,
130			void *logctx)
131			{
132		3412	int index = get_bits_count(gb);
133		3412	int size_bits = get_bits_left(gb);
134		3412	int size = (size_bits + 7) / 8;
135
136	✗✓	3412	if (index & 7) {
137			av_log(logctx, AV_LOG_ERROR, "Unaligned SEI payload\n");
138			return AVERROR_INVALIDDATA;
139			}
140	✗✓	3412	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		3412	memcpy(h->payload, gb->buffer + index / 8, size);
145
146		3412	h->payload_size_bits = size_bits;
147
148		3412	h->present = 1;
149		3412	return 0;
150			}
151
152		639	static int decode_registered_user_data_afd(H264SEIAFD h, GetBitContext gb, int size)
153			{
154			int flag;
155
156	✗✓	639	if (size-- < 1)
157			return AVERROR_INVALIDDATA;
158		639	skip_bits(gb, 1); // 0
159		639	flag = get_bits(gb, 1); // active_format_flag
160		639	skip_bits(gb, 6); // reserved
161
162	✓✗	639	if (flag) {
163	✗✓	639	if (size-- < 1)
164			return AVERROR_INVALIDDATA;
165		639	skip_bits(gb, 4); // reserved
166		639	h->active_format_description = get_bits(gb, 4);
167		639	h->present = 1;
168			}
169
170		639	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		645	static int decode_registered_user_data(H264SEIContext h, GetBitContext gb,
184			void *logctx, int size)
185			{
186			uint32_t country_code;
187			uint32_t user_identifier;
188
189	✗✓	645	if (size < 7)
190			return AVERROR_INVALIDDATA;
191		645	size -= 7;
192
193		645	country_code = get_bits(gb, 8); // itu_t_t35_country_code
194	✗✓	645	if (country_code == 0xFF) {
195			skip_bits(gb, 8); // itu_t_t35_country_code_extension_byte
196			size--;
197			}
198
199			/* itu_t_t35_payload_byte follows */
200		645	skip_bits(gb, 8); // terminal provider code
201		645	skip_bits(gb, 8); // terminal provider oriented code
202		645	user_identifier = get_bits_long(gb, 32);
203
204	✓✓✗	645	switch (user_identifier) {
205		639	case MKBETAG('D', 'T', 'G', '1'): // afd_data
206		639	return decode_registered_user_data_afd(&h->afd, gb, size);
207		6	case MKBETAG('G', 'A', '9', '4'): // closed captions
208		6	return decode_registered_user_data_closed_caption(&h->a53_caption, gb,
209			logctx, size);
210			default:
211			skip_bits(gb, size * 8);
212			break;
213			}
214
215			return 0;
216			}
217
218		248	static int decode_unregistered_user_data(H264SEIUnregistered h, GetBitContext gb,
219			void *logctx, int size)
220			{
221			uint8_t *user_data;
222			int e, build, i;
223			AVBufferRef buf_ref, *tmp;
224
225	✓✗✗✓	248	if (size < 16 \|\| size >= INT_MAX - 1)
226			return AVERROR_INVALIDDATA;
227
228		248	tmp = av_realloc_array(h->buf_ref, h->nb_buf_ref + 1, sizeof(*h->buf_ref));
229	✗✓	248	if (!tmp)
230			return AVERROR(ENOMEM);
231		248	h->buf_ref = tmp;
232
233		248	buf_ref = av_buffer_alloc(size + 1);
234	✗✓	248	if (!buf_ref)
235			return AVERROR(ENOMEM);
236		248	user_data = buf_ref->data;
237
238	✓✓	52451	for (i = 0; i < size; i++)
239		52203	user_data[i] = get_bits(gb, 8);
240
241		248	user_data[i] = 0;
242		248	buf_ref->size = size;
243		248	h->buf_ref[h->nb_buf_ref++] = buf_ref;
244
245		248	e = sscanf(user_data + 16, "x264 - core %d", &build);
246	✓✓✓✓	248	if (e == 1 && build > 0)
247		77	h->x264_build = build;
248	✓✓✗✓ ✗✗	248	if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16))
249			h->x264_build = 67;
250
251		248	return 0;
252			}
253
254		63	static int decode_recovery_point(H264SEIRecoveryPoint h, GetBitContext gb, void *logctx)
255			{
256		63	unsigned recovery_frame_cnt = get_ue_golomb_long(gb);
257
258	✗✓	63	if (recovery_frame_cnt >= (1<<MAX_LOG2_MAX_FRAME_NUM)) {
259			av_log(logctx, AV_LOG_ERROR, "recovery_frame_cnt %u is out of range\n", recovery_frame_cnt);
260			return AVERROR_INVALIDDATA;
261			}
262
263		63	h->recovery_frame_cnt = recovery_frame_cnt;
264			/* 1b exact_match_flag,
265			* 1b broken_link_flag,
266			* 2b changing_slice_group_idc */
267		63	skip_bits(gb, 4);
268
269		63	return 0;
270			}
271
272		736	static int decode_buffering_period(H264SEIBufferingPeriod h, GetBitContext gb,
273			const H264ParamSets ps, void logctx)
274			{
275			unsigned int sps_id;
276			int sched_sel_idx;
277			const SPS *sps;
278
279		736	sps_id = get_ue_golomb_31(gb);
280	✓✗✓✓	736	if (sps_id > 31 \|\| !ps->sps_list[sps_id]) {
281		4	av_log(logctx, AV_LOG_ERROR,
282			"non-existing SPS %d referenced in buffering period\n", sps_id);
283	✗✓	4	return sps_id > 31 ? AVERROR_INVALIDDATA : AVERROR_PS_NOT_FOUND;
284			}
285		732	sps = (const SPS*)ps->sps_list[sps_id]->data;
286
287			// NOTE: This is really so duplicated in the standard... See H.264, D.1.1
288	✓✓	732	if (sps->nal_hrd_parameters_present_flag) {
289	✓✓	586	for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
290		293	h->initial_cpb_removal_delay[sched_sel_idx] =
291		293	get_bits_long(gb, sps->initial_cpb_removal_delay_length);
292			// initial_cpb_removal_delay_offset
293		293	skip_bits(gb, sps->initial_cpb_removal_delay_length);
294			}
295			}
296	✓✓	732	if (sps->vcl_hrd_parameters_present_flag) {
297	✓✓	360	for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
298		180	h->initial_cpb_removal_delay[sched_sel_idx] =
299		180	get_bits_long(gb, sps->initial_cpb_removal_delay_length);
300			// initial_cpb_removal_delay_offset
301		180	skip_bits(gb, sps->initial_cpb_removal_delay_length);
302			}
303			}
304
305		732	h->present = 1;
306		732	return 0;
307			}
308
309			static int decode_frame_packing_arrangement(H264SEIFramePacking *h,
310			GetBitContext *gb)
311			{
312			h->arrangement_id = get_ue_golomb_long(gb);
313			h->arrangement_cancel_flag = get_bits1(gb);
314			h->present = !h->arrangement_cancel_flag;
315
316			if (h->present) {
317			h->arrangement_type = get_bits(gb, 7);
318			h->quincunx_sampling_flag = get_bits1(gb);
319			h->content_interpretation_type = get_bits(gb, 6);
320
321			// spatial_flipping_flag, frame0_flipped_flag, field_views_flag
322			skip_bits(gb, 3);
323			h->current_frame_is_frame0_flag = get_bits1(gb);
324			// frame0_self_contained_flag, frame1_self_contained_flag
325			skip_bits(gb, 2);
326
327			if (!h->quincunx_sampling_flag && h->arrangement_type != 5)
328			skip_bits(gb, 16); // frame[01]_grid_position_[xy]
329			skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
330			h->arrangement_repetition_period = get_ue_golomb_long(gb);
331			}
332			skip_bits1(gb); // frame_packing_arrangement_extension_flag
333
334			return 0;
335			}
336
337		2	static int decode_display_orientation(H264SEIDisplayOrientation *h,
338			GetBitContext *gb)
339			{
340		2	h->present = !get_bits1(gb);
341
342	✓✗	2	if (h->present) {
343		2	h->hflip = get_bits1(gb); // hor_flip
344		2	h->vflip = get_bits1(gb); // ver_flip
345
346		2	h->anticlockwise_rotation = get_bits(gb, 16);
347		2	get_ue_golomb_long(gb); // display_orientation_repetition_period
348		2	skip_bits1(gb); // display_orientation_extension_flag
349			}
350
351		2	return 0;
352			}
353
354			static int decode_green_metadata(H264SEIGreenMetaData h, GetBitContext gb)
355			{
356			h->green_metadata_type = get_bits(gb, 8);
357
358			if (h->green_metadata_type == 0) {
359			h->period_type = get_bits(gb, 8);
360
361			if (h->period_type == 2)
362			h->num_seconds = get_bits(gb, 16);
363			else if (h->period_type == 3)
364			h->num_pictures = get_bits(gb, 16);
365
366			h->percent_non_zero_macroblocks = get_bits(gb, 8);
367			h->percent_intra_coded_macroblocks = get_bits(gb, 8);
368			h->percent_six_tap_filtering = get_bits(gb, 8);
369			h->percent_alpha_point_deblocking_instance = get_bits(gb, 8);
370
371			} else if (h->green_metadata_type == 1) {
372			h->xsd_metric_type = get_bits(gb, 8);
373			h->xsd_metric_value = get_bits(gb, 16);
374			}
375
376			return 0;
377			}
378
379			static int decode_alternative_transfer(H264SEIAlternativeTransfer *h,
380			GetBitContext *gb)
381			{
382			h->present = 1;
383			h->preferred_transfer_characteristics = get_bits(gb, 8);
384			return 0;
385			}
386
387		4047	int ff_h264_sei_decode(H264SEIContext h, GetBitContext gb,
388			const H264ParamSets ps, void logctx)
389			{
390		4047	int master_ret = 0;
391
392	✓✓✓✓	9404	while (get_bits_left(gb) > 16 && show_bits(gb, 16)) {
393			GetBitContext gb_payload;
394		5364	int type = 0;
395		5364	unsigned size = 0;
396		5364	int ret = 0;
397
398			do {
399	✗✓	5388	if (get_bits_left(gb) < 8)
400		7	return AVERROR_INVALIDDATA;
401		5388	type += show_bits(gb, 8);
402	✓✓	5388	} while (get_bits(gb, 8) == 255);
403
404			do {
405	✗✓	5520	if (get_bits_left(gb) < 8)
406			return AVERROR_INVALIDDATA;
407		5520	size += show_bits(gb, 8);
408	✓✓	5520	} while (get_bits(gb, 8) == 255);
409
410	✓✓	5364	if (size > get_bits_left(gb) / 8) {
411		7	av_log(logctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n",
412			type, 8*size, get_bits_left(gb));
413		7	return AVERROR_INVALIDDATA;
414			}
415
416		5357	ret = init_get_bits8(&gb_payload, gb->buffer + get_bits_count(gb) / 8, size);
417	✗✓	5357	if (ret < 0)
418			return ret;
419
420	✓✓✓✓ ✓✗✓✗ ✗✓	5357	switch (type) {
421		3412	case H264_SEI_TYPE_PIC_TIMING: // Picture timing SEI
422		3412	ret = decode_picture_timing(&h->picture_timing, &gb_payload, logctx);
423		3412	break;
424		645	case H264_SEI_TYPE_USER_DATA_REGISTERED:
425		645	ret = decode_registered_user_data(h, &gb_payload, logctx, size);
426		645	break;
427		248	case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
428		248	ret = decode_unregistered_user_data(&h->unregistered, &gb_payload, logctx, size);
429		248	break;
430		63	case H264_SEI_TYPE_RECOVERY_POINT:
431		63	ret = decode_recovery_point(&h->recovery_point, &gb_payload, logctx);
432		63	break;
433		736	case H264_SEI_TYPE_BUFFERING_PERIOD:
434		736	ret = decode_buffering_period(&h->buffering_period, &gb_payload, ps, logctx);
435		736	break;
436			case H264_SEI_TYPE_FRAME_PACKING:
437			ret = decode_frame_packing_arrangement(&h->frame_packing, &gb_payload);
438			break;
439		2	case H264_SEI_TYPE_DISPLAY_ORIENTATION:
440		2	ret = decode_display_orientation(&h->display_orientation, &gb_payload);
441		2	break;
442			case H264_SEI_TYPE_GREEN_METADATA:
443			ret = decode_green_metadata(&h->green_metadata, &gb_payload);
444			break;
445			case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
446			ret = decode_alternative_transfer(&h->alternative_transfer, &gb_payload);
447			break;
448		251	default:
449		251	av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
450			}
451	✓✓✗✓	5357	if (ret < 0 && ret != AVERROR_PS_NOT_FOUND)
452			return ret;
453	✓✓	5357	if (ret < 0)
454		4	master_ret = ret;
455
456	✓✓	5357	if (get_bits_left(&gb_payload) < 0) {
457		2	av_log(logctx, AV_LOG_WARNING, "SEI type %d overread by %d bits\n",
458		2	type, -get_bits_left(&gb_payload));
459			}
460
461		5357	skip_bits_long(gb, 8 * size);
462			}
463
464		4040	return master_ret;
465			}
466
467		22292	const char ff_h264_sei_stereo_mode(const H264SEIFramePacking h)
468			{
469	✗✓	22292	if (h->arrangement_cancel_flag == 0) {
470			switch (h->arrangement_type) {
471			case H264_SEI_FPA_TYPE_CHECKERBOARD:
472			if (h->content_interpretation_type == 2)
473			return "checkerboard_rl";
474			else
475			return "checkerboard_lr";
476			case H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN:
477			if (h->content_interpretation_type == 2)
478			return "col_interleaved_rl";
479			else
480			return "col_interleaved_lr";
481			case H264_SEI_FPA_TYPE_INTERLEAVE_ROW:
482			if (h->content_interpretation_type == 2)
483			return "row_interleaved_rl";
484			else
485			return "row_interleaved_lr";
486			case H264_SEI_FPA_TYPE_SIDE_BY_SIDE:
487			if (h->content_interpretation_type == 2)
488			return "right_left";
489			else
490			return "left_right";
491			case H264_SEI_FPA_TYPE_TOP_BOTTOM:
492			if (h->content_interpretation_type == 2)
493			return "bottom_top";
494			else
495			return "top_bottom";
496			case H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL:
497			if (h->content_interpretation_type == 2)
498			return "block_rl";
499			else
500			return "block_lr";
501			case H264_SEI_FPA_TYPE_2D:
502			default:
503			return "mono";
504			}
505	✗✓	22292	} else if (h->arrangement_cancel_flag == 1) {
506			return "mono";
507			} else {
508		22292	return NULL;
509			}
510			}