FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/h264_sei.c	Lines:	198	297	66.7 %
Date:	2020-04-02 05:41:20	Branches:	97	174	55.7 %


/*
 * H.26L/H.264/AVC/JVT/14496-10/... SEI decoding
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * H.264 / AVC / MPEG-4 part10 SEI decoding.
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "h264_ps.h"
#include "h264_sei.h"
#include "internal.h"

#define AVERROR_PS_NOT_FOUND      FFERRTAG(0xF8,'?','P','S')

static const uint8_t sei_num_clock_ts_table[9] = {
    1, 1, 1, 2, 2, 3, 3, 2, 3
};

void ff_h264_sei_uninit(H264SEIContext *h)
{
    h->recovery_point.recovery_frame_cnt = -1;

    h->picture_timing.dpb_output_delay  = 0;
    h->picture_timing.cpb_removal_delay = -1;

    h->picture_timing.present      = 0;
    h->buffering_period.present    = 0;
    h->frame_packing.present       = 0;
    h->display_orientation.present = 0;
    h->afd.present                 =  0;

    av_buffer_unref(&h->a53_caption.buf_ref);
}

static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb,
                                 const H264ParamSets *ps, void *logctx)
{
    int i;
    const SPS *sps = ps->sps;

    for (i = 0; i<MAX_SPS_COUNT; i++)
        if ((!sps || !sps->log2_max_frame_num) && ps->sps_list[i])
            sps = (const SPS *)ps->sps_list[i]->data;

    if (!sps) {
        av_log(logctx, AV_LOG_ERROR, "SPS unavailable in decode_picture_timing\n");
        return AVERROR_PS_NOT_FOUND;
    }

    if (sps->nal_hrd_parameters_present_flag ||
        sps->vcl_hrd_parameters_present_flag) {
        h->cpb_removal_delay = get_bits_long(gb, sps->cpb_removal_delay_length);
        h->dpb_output_delay  = get_bits_long(gb, sps->dpb_output_delay_length);
    }
    if (sps->pic_struct_present_flag) {
        unsigned int i, num_clock_ts;

        h->pic_struct = get_bits(gb, 4);
        h->ct_type    = 0;

        if (h->pic_struct > H264_SEI_PIC_STRUCT_FRAME_TRIPLING)
            return AVERROR_INVALIDDATA;

        num_clock_ts = sei_num_clock_ts_table[h->pic_struct];
        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);
    }

    h->present = 1;
    return 0;
}

static int decode_registered_user_data_afd(H264SEIAFD *h, GetBitContext *gb, int size)
{
    int flag;

    if (size-- < 1)
        return AVERROR_INVALIDDATA;
    skip_bits(gb, 1);               // 0
    flag = get_bits(gb, 1);         // active_format_flag
    skip_bits(gb, 6);               // reserved

    if (flag) {
        if (size-- < 1)
            return AVERROR_INVALIDDATA;
        skip_bits(gb, 4);           // reserved
        h->active_format_description = get_bits(gb, 4);
        h->present                   = 1;
    }

    return 0;
}

static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h,
                                                     GetBitContext *gb, void *logctx,
                                                     int size)
{
    int flag;
    int user_data_type_code;
    int cc_count;

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

    user_data_type_code = get_bits(gb, 8);
    if (user_data_type_code == 0x3) {
        skip_bits(gb, 1);           // reserved

        flag = get_bits(gb, 1);     // process_cc_data_flag
        if (flag) {
            skip_bits(gb, 1);       // zero bit
            cc_count = get_bits(gb, 5);
            skip_bits(gb, 8);       // reserved
            size -= 2;

            if (cc_count && size >= cc_count * 3) {
                int old_size = h->buf_ref ? h->buf_ref->size : 0;
                const uint64_t new_size = (old_size + cc_count
                                           * UINT64_C(3));
                int i, ret;

                if (new_size > INT_MAX)
                    return AVERROR(EINVAL);

                /* Allow merging of the cc data from two fields. */
                ret = av_buffer_realloc(&h->buf_ref, new_size);
                if (ret < 0)
                    return ret;

                /* Use of av_buffer_realloc assumes buffer is writeable */
                for (i = 0; i < cc_count; i++) {
                    h->buf_ref->data[old_size++] = get_bits(gb, 8);
                    h->buf_ref->data[old_size++] = get_bits(gb, 8);
                    h->buf_ref->data[old_size++] = get_bits(gb, 8);
                }

                skip_bits(gb, 8);   // marker_bits
            }
        }
    } else {
        int i;
        for (i = 0; i < size - 1; i++)
            skip_bits(gb, 8);
    }

    return 0;
}

static int decode_registered_user_data(H264SEIContext *h, GetBitContext *gb,
                                       void *logctx, int size)
{
    uint32_t country_code;
    uint32_t user_identifier;

    if (size < 7)
        return AVERROR_INVALIDDATA;
    size -= 7;

    country_code = get_bits(gb, 8); // itu_t_t35_country_code
    if (country_code == 0xFF) {
        skip_bits(gb, 8);           // itu_t_t35_country_code_extension_byte
        size--;
    }

    /* itu_t_t35_payload_byte follows */
    skip_bits(gb, 8);              // terminal provider code
    skip_bits(gb, 8);              // terminal provider oriented code
    user_identifier = get_bits_long(gb, 32);

    switch (user_identifier) {
        case MKBETAG('D', 'T', 'G', '1'):       // afd_data
            return decode_registered_user_data_afd(&h->afd, gb, size);
        case MKBETAG('G', 'A', '9', '4'):       // closed captions
            return decode_registered_user_data_closed_caption(&h->a53_caption, gb,
                                                              logctx, size);
        default:
            skip_bits(gb, size * 8);
            break;
    }

    return 0;
}

static int decode_unregistered_user_data(H264SEIUnregistered *h, GetBitContext *gb,
                                         void *logctx, int size)
{
    uint8_t *user_data;
    int e, build, i;

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

    user_data = av_malloc(size + 1);
    if (!user_data)
        return AVERROR(ENOMEM);

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

    user_data[i] = 0;
    e = sscanf(user_data + 16, "x264 - core %d", &build);
    if (e == 1 && build > 0)
        h->x264_build = build;
    if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16))
        h->x264_build = 67;

    av_free(user_data);
    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)) {
        int type = 0;
        unsigned size = 0;
        unsigned next;
        int ret  = 0;

        do {
            if (get_bits_left(gb) < 8)
                return AVERROR_INVALIDDATA;
            type += show_bits(gb, 8);
        } while (get_bits(gb, 8) == 255);

        do {
            if (get_bits_left(gb) < 8)
                return AVERROR_INVALIDDATA;
            size += show_bits(gb, 8);
        } while (get_bits(gb, 8) == 255);

        if (size > get_bits_left(gb) / 8) {
            av_log(logctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n",
                   type, 8*size, get_bits_left(gb));
            return AVERROR_INVALIDDATA;
        }
        next = get_bits_count(gb) + 8 * size;

        switch (type) {
        case H264_SEI_TYPE_PIC_TIMING: // Picture timing SEI
            ret = decode_picture_timing(&h->picture_timing, gb, ps, logctx);
            break;
        case H264_SEI_TYPE_USER_DATA_REGISTERED:
            ret = decode_registered_user_data(h, gb, logctx, size);
            break;
        case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
            ret = decode_unregistered_user_data(&h->unregistered, gb, logctx, size);
            break;
        case H264_SEI_TYPE_RECOVERY_POINT:
            ret = decode_recovery_point(&h->recovery_point, gb, logctx);
            break;
        case H264_SEI_TYPE_BUFFERING_PERIOD:
            ret = decode_buffering_period(&h->buffering_period, gb, ps, logctx);
            break;
        case H264_SEI_TYPE_FRAME_PACKING:
            ret = decode_frame_packing_arrangement(&h->frame_packing, gb);
            break;
        case H264_SEI_TYPE_DISPLAY_ORIENTATION:
            ret = decode_display_orientation(&h->display_orientation, gb);
            break;
        case H264_SEI_TYPE_GREEN_METADATA:
            ret = decode_green_metadata(&h->green_metadata, gb);
            break;
        case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
            ret = decode_alternative_transfer(&h->alternative_transfer, gb);
            break;
        default:
            av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
        }
        if (ret < 0 && ret != AVERROR_PS_NOT_FOUND)
            return ret;
        if (ret < 0)
            master_ret = ret;

        skip_bits_long(gb, next - get_bits_count(gb));

        // FIXME check bits here
        align_get_bits(gb);
    }

    return master_ret;
}

const char *ff_h264_sei_stereo_mode(const H264SEIFramePacking *h)
{
    if (h->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 "avcodec.h"
29			#include "get_bits.h"
30			#include "golomb.h"
31			#include "h264_ps.h"
32			#include "h264_sei.h"
33			#include "internal.h"
34
35			#define AVERROR_PS_NOT_FOUND FFERRTAG(0xF8,'?','P','S')
36
37			static const uint8_t sei_num_clock_ts_table[9] = {
38			1, 1, 1, 2, 2, 3, 3, 2, 3
39			};
40
41		50797	void ff_h264_sei_uninit(H264SEIContext *h)
42			{
43		50797	h->recovery_point.recovery_frame_cnt = -1;
44
45		50797	h->picture_timing.dpb_output_delay = 0;
46		50797	h->picture_timing.cpb_removal_delay = -1;
47
48		50797	h->picture_timing.present = 0;
49		50797	h->buffering_period.present = 0;
50		50797	h->frame_packing.present = 0;
51		50797	h->display_orientation.present = 0;
52		50797	h->afd.present = 0;
53
54		50797	av_buffer_unref(&h->a53_caption.buf_ref);
55		50797	}
56
57		3412	static int decode_picture_timing(H264SEIPictureTiming h, GetBitContext gb,
58			const H264ParamSets ps, void logctx)
59			{
60			int i;
61		3412	const SPS *sps = ps->sps;
62
63	✓✓	112596	for (i = 0; i<MAX_SPS_COUNT; i++)
64	✓✓✗✓ ✓✓	109184	if ((!sps \|\| !sps->log2_max_frame_num) && ps->sps_list[i])
65		75	sps = (const SPS *)ps->sps_list[i]->data;
66
67	✓✓	3412	if (!sps) {
68		52	av_log(logctx, AV_LOG_ERROR, "SPS unavailable in decode_picture_timing\n");
69		52	return AVERROR_PS_NOT_FOUND;
70			}
71
72	✓✓	3360	if (sps->nal_hrd_parameters_present_flag \|\|
73	✗✓	1723	sps->vcl_hrd_parameters_present_flag) {
74		1637	h->cpb_removal_delay = get_bits_long(gb, sps->cpb_removal_delay_length);
75		1637	h->dpb_output_delay = get_bits_long(gb, sps->dpb_output_delay_length);
76			}
77	✓✓	3360	if (sps->pic_struct_present_flag) {
78			unsigned int i, num_clock_ts;
79
80		3332	h->pic_struct = get_bits(gb, 4);
81		3332	h->ct_type = 0;
82
83	✗✓	3332	if (h->pic_struct > H264_SEI_PIC_STRUCT_FRAME_TRIPLING)
84			return AVERROR_INVALIDDATA;
85
86		3332	num_clock_ts = sei_num_clock_ts_table[h->pic_struct];
87		3332	h->timecode_cnt = 0;
88	✓✓	8296	for (i = 0; i < num_clock_ts; i++) {
89	✓✓	4964	if (get_bits(gb, 1)) { /* clock_timestamp_flag */
90		1904	H264SEITimeCode *tc = &h->timecode[h->timecode_cnt++];
91			unsigned int full_timestamp_flag;
92			unsigned int counting_type, cnt_dropped_flag;
93		1904	h->ct_type \|= 1 << get_bits(gb, 2);
94		1904	skip_bits(gb, 1); /* nuit_field_based_flag */
95		1904	counting_type = get_bits(gb, 5); /* counting_type */
96		1904	full_timestamp_flag = get_bits(gb, 1);
97		1904	skip_bits(gb, 1); /* discontinuity_flag */
98		1904	cnt_dropped_flag = get_bits(gb, 1); /* cnt_dropped_flag */
99	✗✓✗✗ ✗✗	1904	if (cnt_dropped_flag && counting_type > 1 && counting_type < 7)
100			tc->dropframe = 1;
101		1904	tc->frame = get_bits(gb, 8); /* n_frames */
102	✓✓	1904	if (full_timestamp_flag) {
103		1202	tc->full = 1;
104		1202	tc->seconds = get_bits(gb, 6); /* seconds_value 0..59 */
105		1202	tc->minutes = get_bits(gb, 6); /* minutes_value 0..59 */
106		1202	tc->hours = get_bits(gb, 5); /* hours_value 0..23 */
107			} else {
108		702	tc->seconds = tc->minutes = tc->hours = tc->full = 0;
109	✓✓	702	if (get_bits(gb, 1)) { /* seconds_flag */
110		339	tc->seconds = get_bits(gb, 6);
111	✓✓	339	if (get_bits(gb, 1)) { /* minutes_flag */
112		327	tc->minutes = get_bits(gb, 6);
113	✗✓	327	if (get_bits(gb, 1)) /* hours_flag */
114			tc->hours = get_bits(gb, 5);
115			}
116			}
117			}
118
119	✓✗	1904	if (sps->time_offset_length > 0)
120		1904	skip_bits(gb,
121			sps->time_offset_length); /* time_offset */
122			}
123			}
124
125		3332	av_log(logctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n",
126		3332	h->ct_type, h->pic_struct);
127			}
128
129		3360	h->present = 1;
130		3360	return 0;
131			}
132
133		639	static int decode_registered_user_data_afd(H264SEIAFD h, GetBitContext gb, int size)
134			{
135			int flag;
136
137	✗✓	639	if (size-- < 1)
138			return AVERROR_INVALIDDATA;
139		639	skip_bits(gb, 1); // 0
140		639	flag = get_bits(gb, 1); // active_format_flag
141		639	skip_bits(gb, 6); // reserved
142
143	✓✗	639	if (flag) {
144	✗✓	639	if (size-- < 1)
145			return AVERROR_INVALIDDATA;
146		639	skip_bits(gb, 4); // reserved
147		639	h->active_format_description = get_bits(gb, 4);
148		639	h->present = 1;
149			}
150
151		639	return 0;
152			}
153
154		6	static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h,
155			GetBitContext gb, void logctx,
156			int size)
157			{
158			int flag;
159			int user_data_type_code;
160			int cc_count;
161
162	✗✓	6	if (size < 3)
163			return AVERROR(EINVAL);
164
165		6	user_data_type_code = get_bits(gb, 8);
166	✓✗	6	if (user_data_type_code == 0x3) {
167		6	skip_bits(gb, 1); // reserved
168
169		6	flag = get_bits(gb, 1); // process_cc_data_flag
170	✓✗	6	if (flag) {
171		6	skip_bits(gb, 1); // zero bit
172		6	cc_count = get_bits(gb, 5);
173		6	skip_bits(gb, 8); // reserved
174		6	size -= 2;
175
176	✓✗✓✗	6	if (cc_count && size >= cc_count * 3) {
177	✗✓	6	int old_size = h->buf_ref ? h->buf_ref->size : 0;
178		6	const uint64_t new_size = (old_size + cc_count
179		6	* UINT64_C(3));
180			int i, ret;
181
182	✗✓	6	if (new_size > INT_MAX)
183			return AVERROR(EINVAL);
184
185			/* Allow merging of the cc data from two fields. */
186		6	ret = av_buffer_realloc(&h->buf_ref, new_size);
187	✗✓	6	if (ret < 0)
188			return ret;
189
190			/* Use of av_buffer_realloc assumes buffer is writeable */
191	✓✓	19	for (i = 0; i < cc_count; i++) {
192		13	h->buf_ref->data[old_size++] = get_bits(gb, 8);
193		13	h->buf_ref->data[old_size++] = get_bits(gb, 8);
194		13	h->buf_ref->data[old_size++] = get_bits(gb, 8);
195			}
196
197		6	skip_bits(gb, 8); // marker_bits
198			}
199			}
200			} else {
201			int i;
202			for (i = 0; i < size - 1; i++)
203			skip_bits(gb, 8);
204			}
205
206		6	return 0;
207			}
208
209		645	static int decode_registered_user_data(H264SEIContext h, GetBitContext gb,
210			void *logctx, int size)
211			{
212			uint32_t country_code;
213			uint32_t user_identifier;
214
215	✗✓	645	if (size < 7)
216			return AVERROR_INVALIDDATA;
217		645	size -= 7;
218
219		645	country_code = get_bits(gb, 8); // itu_t_t35_country_code
220	✗✓	645	if (country_code == 0xFF) {
221			skip_bits(gb, 8); // itu_t_t35_country_code_extension_byte
222			size--;
223			}
224
225			/* itu_t_t35_payload_byte follows */
226		645	skip_bits(gb, 8); // terminal provider code
227		645	skip_bits(gb, 8); // terminal provider oriented code
228		645	user_identifier = get_bits_long(gb, 32);
229
230	✓✓✗	645	switch (user_identifier) {
231		639	case MKBETAG('D', 'T', 'G', '1'): // afd_data
232		639	return decode_registered_user_data_afd(&h->afd, gb, size);
233		6	case MKBETAG('G', 'A', '9', '4'): // closed captions
234		6	return decode_registered_user_data_closed_caption(&h->a53_caption, gb,
235			logctx, size);
236			default:
237			skip_bits(gb, size * 8);
238			break;
239			}
240
241			return 0;
242			}
243
244		248	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
250	✓✗✗✓	248	if (size < 16 \|\| size >= INT_MAX - 1)
251			return AVERROR_INVALIDDATA;
252
253		248	user_data = av_malloc(size + 1);
254	✗✓	248	if (!user_data)
255			return AVERROR(ENOMEM);
256
257	✓✓	52451	for (i = 0; i < size; i++)
258		52203	user_data[i] = get_bits(gb, 8);
259
260		248	user_data[i] = 0;
261		248	e = sscanf(user_data + 16, "x264 - core %d", &build);
262	✓✓✓✓	248	if (e == 1 && build > 0)
263		77	h->x264_build = build;
264	✓✓✗✓ ✗✗	248	if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16))
265			h->x264_build = 67;
266
267		248	av_free(user_data);
268		248	return 0;
269			}
270
271		63	static int decode_recovery_point(H264SEIRecoveryPoint h, GetBitContext gb, void *logctx)
272			{
273		63	unsigned recovery_frame_cnt = get_ue_golomb_long(gb);
274
275	✗✓	63	if (recovery_frame_cnt >= (1<<MAX_LOG2_MAX_FRAME_NUM)) {
276			av_log(logctx, AV_LOG_ERROR, "recovery_frame_cnt %u is out of range\n", recovery_frame_cnt);
277			return AVERROR_INVALIDDATA;
278			}
279
280		63	h->recovery_frame_cnt = recovery_frame_cnt;
281			/* 1b exact_match_flag,
282			* 1b broken_link_flag,
283			* 2b changing_slice_group_idc */
284		63	skip_bits(gb, 4);
285
286		63	return 0;
287			}
288
289		736	static int decode_buffering_period(H264SEIBufferingPeriod h, GetBitContext gb,
290			const H264ParamSets ps, void logctx)
291			{
292			unsigned int sps_id;
293			int sched_sel_idx;
294			const SPS *sps;
295
296		736	sps_id = get_ue_golomb_31(gb);
297	✓✗✓✓	736	if (sps_id > 31 \|\| !ps->sps_list[sps_id]) {
298		4	av_log(logctx, AV_LOG_ERROR,
299			"non-existing SPS %d referenced in buffering period\n", sps_id);
300	✗✓	4	return sps_id > 31 ? AVERROR_INVALIDDATA : AVERROR_PS_NOT_FOUND;
301			}
302		732	sps = (const SPS*)ps->sps_list[sps_id]->data;
303
304			// NOTE: This is really so duplicated in the standard... See H.264, D.1.1
305	✓✓	732	if (sps->nal_hrd_parameters_present_flag) {
306	✓✓	586	for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
307		293	h->initial_cpb_removal_delay[sched_sel_idx] =
308		293	get_bits_long(gb, sps->initial_cpb_removal_delay_length);
309			// initial_cpb_removal_delay_offset
310		293	skip_bits(gb, sps->initial_cpb_removal_delay_length);
311			}
312			}
313	✓✓	732	if (sps->vcl_hrd_parameters_present_flag) {
314	✓✓	360	for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
315		180	h->initial_cpb_removal_delay[sched_sel_idx] =
316		180	get_bits_long(gb, sps->initial_cpb_removal_delay_length);
317			// initial_cpb_removal_delay_offset
318		180	skip_bits(gb, sps->initial_cpb_removal_delay_length);
319			}
320			}
321
322		732	h->present = 1;
323		732	return 0;
324			}
325
326			static int decode_frame_packing_arrangement(H264SEIFramePacking *h,
327			GetBitContext *gb)
328			{
329			h->arrangement_id = get_ue_golomb_long(gb);
330			h->arrangement_cancel_flag = get_bits1(gb);
331			h->present = !h->arrangement_cancel_flag;
332
333			if (h->present) {
334			h->arrangement_type = get_bits(gb, 7);
335			h->quincunx_sampling_flag = get_bits1(gb);
336			h->content_interpretation_type = get_bits(gb, 6);
337
338			// spatial_flipping_flag, frame0_flipped_flag, field_views_flag
339			skip_bits(gb, 3);
340			h->current_frame_is_frame0_flag = get_bits1(gb);
341			// frame0_self_contained_flag, frame1_self_contained_flag
342			skip_bits(gb, 2);
343
344			if (!h->quincunx_sampling_flag && h->arrangement_type != 5)
345			skip_bits(gb, 16); // frame[01]_grid_position_[xy]
346			skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
347			h->arrangement_repetition_period = get_ue_golomb_long(gb);
348			}
349			skip_bits1(gb); // frame_packing_arrangement_extension_flag
350
351			return 0;
352			}
353
354		2	static int decode_display_orientation(H264SEIDisplayOrientation *h,
355			GetBitContext *gb)
356			{
357		2	h->present = !get_bits1(gb);
358
359	✓✗	2	if (h->present) {
360		2	h->hflip = get_bits1(gb); // hor_flip
361		2	h->vflip = get_bits1(gb); // ver_flip
362
363		2	h->anticlockwise_rotation = get_bits(gb, 16);
364		2	get_ue_golomb_long(gb); // display_orientation_repetition_period
365		2	skip_bits1(gb); // display_orientation_extension_flag
366			}
367
368		2	return 0;
369			}
370
371			static int decode_green_metadata(H264SEIGreenMetaData h, GetBitContext gb)
372			{
373			h->green_metadata_type = get_bits(gb, 8);
374
375			if (h->green_metadata_type == 0) {
376			h->period_type = get_bits(gb, 8);
377
378			if (h->period_type == 2)
379			h->num_seconds = get_bits(gb, 16);
380			else if (h->period_type == 3)
381			h->num_pictures = get_bits(gb, 16);
382
383			h->percent_non_zero_macroblocks = get_bits(gb, 8);
384			h->percent_intra_coded_macroblocks = get_bits(gb, 8);
385			h->percent_six_tap_filtering = get_bits(gb, 8);
386			h->percent_alpha_point_deblocking_instance = get_bits(gb, 8);
387
388			} else if (h->green_metadata_type == 1) {
389			h->xsd_metric_type = get_bits(gb, 8);
390			h->xsd_metric_value = get_bits(gb, 16);
391			}
392
393			return 0;
394			}
395
396			static int decode_alternative_transfer(H264SEIAlternativeTransfer *h,
397			GetBitContext *gb)
398			{
399			h->present = 1;
400			h->preferred_transfer_characteristics = get_bits(gb, 8);
401			return 0;
402			}
403
404		4047	int ff_h264_sei_decode(H264SEIContext h, GetBitContext gb,
405			const H264ParamSets ps, void logctx)
406			{
407		4047	int master_ret = 0;
408
409	✓✓✓✓	9404	while (get_bits_left(gb) > 16 && show_bits(gb, 16)) {
410		5364	int type = 0;
411		5364	unsigned size = 0;
412			unsigned next;
413		5364	int ret = 0;
414
415			do {
416	✗✓	5388	if (get_bits_left(gb) < 8)
417			return AVERROR_INVALIDDATA;
418		5388	type += show_bits(gb, 8);
419	✓✓	5388	} while (get_bits(gb, 8) == 255);
420
421			do {
422	✗✓	5520	if (get_bits_left(gb) < 8)
423			return AVERROR_INVALIDDATA;
424		5520	size += show_bits(gb, 8);
425	✓✓	5520	} while (get_bits(gb, 8) == 255);
426
427	✓✓	5364	if (size > get_bits_left(gb) / 8) {
428		7	av_log(logctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n",
429			type, 8*size, get_bits_left(gb));
430		7	return AVERROR_INVALIDDATA;
431			}
432		5357	next = get_bits_count(gb) + 8 * size;
433
434	✓✓✓✓ ✓✗✓✗ ✗✓	5357	switch (type) {
435		3412	case H264_SEI_TYPE_PIC_TIMING: // Picture timing SEI
436		3412	ret = decode_picture_timing(&h->picture_timing, gb, ps, logctx);
437		3412	break;
438		645	case H264_SEI_TYPE_USER_DATA_REGISTERED:
439		645	ret = decode_registered_user_data(h, gb, logctx, size);
440		645	break;
441		248	case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
442		248	ret = decode_unregistered_user_data(&h->unregistered, gb, logctx, size);
443		248	break;
444		63	case H264_SEI_TYPE_RECOVERY_POINT:
445		63	ret = decode_recovery_point(&h->recovery_point, gb, logctx);
446		63	break;
447		736	case H264_SEI_TYPE_BUFFERING_PERIOD:
448		736	ret = decode_buffering_period(&h->buffering_period, gb, ps, logctx);
449		736	break;
450			case H264_SEI_TYPE_FRAME_PACKING:
451			ret = decode_frame_packing_arrangement(&h->frame_packing, gb);
452			break;
453		2	case H264_SEI_TYPE_DISPLAY_ORIENTATION:
454		2	ret = decode_display_orientation(&h->display_orientation, gb);
455		2	break;
456			case H264_SEI_TYPE_GREEN_METADATA:
457			ret = decode_green_metadata(&h->green_metadata, gb);
458			break;
459			case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
460			ret = decode_alternative_transfer(&h->alternative_transfer, gb);
461			break;
462		251	default:
463		251	av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
464			}
465	✓✓✗✓	5357	if (ret < 0 && ret != AVERROR_PS_NOT_FOUND)
466			return ret;
467	✓✓	5357	if (ret < 0)
468		56	master_ret = ret;
469
470		5357	skip_bits_long(gb, next - get_bits_count(gb));
471
472			// FIXME check bits here
473		5357	align_get_bits(gb);
474			}
475
476		4040	return master_ret;
477			}
478
479		22143	const char ff_h264_sei_stereo_mode(const H264SEIFramePacking h)
480			{
481	✗✓	22143	if (h->arrangement_cancel_flag == 0) {
482			switch (h->arrangement_type) {
483			case H264_SEI_FPA_TYPE_CHECKERBOARD:
484			if (h->content_interpretation_type == 2)
485			return "checkerboard_rl";
486			else
487			return "checkerboard_lr";
488			case H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN:
489			if (h->content_interpretation_type == 2)
490			return "col_interleaved_rl";
491			else
492			return "col_interleaved_lr";
493			case H264_SEI_FPA_TYPE_INTERLEAVE_ROW:
494			if (h->content_interpretation_type == 2)
495			return "row_interleaved_rl";
496			else
497			return "row_interleaved_lr";
498			case H264_SEI_FPA_TYPE_SIDE_BY_SIDE:
499			if (h->content_interpretation_type == 2)
500			return "right_left";
501			else
502			return "left_right";
503			case H264_SEI_FPA_TYPE_TOP_BOTTOM:
504			if (h->content_interpretation_type == 2)
505			return "bottom_top";
506			else
507			return "top_bottom";
508			case H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL:
509			if (h->content_interpretation_type == 2)
510			return "block_rl";
511			else
512			return "block_lr";
513			case H264_SEI_FPA_TYPE_2D:
514			default:
515			return "mono";
516			}
517	✗✓	22143	} else if (h->arrangement_cancel_flag == 1) {
518			return "mono";
519			} else {
520		22143	return NULL;
521			}
522			}