mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
fa618f5f49
Fixes: out of array write on x86-32
Fixes: 57825/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG2VIDEO_fuzzer-6094366187061248
Fixes: 57829/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG2VIDEO_fuzzer-4526419991724032
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
This reverts commit f7abe92bd7.
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_ERROR_RESILIENCE_H
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#define AVCODEC_ERROR_RESILIENCE_H
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#include <stdint.h>
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#include <stdatomic.h>
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#include "avcodec.h"
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#include "me_cmp.h"
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#include "threadframe.h"
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///< current MB is the first after a resync marker
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#define VP_START 1
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#define ER_AC_ERROR 2
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#define ER_DC_ERROR 4
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#define ER_MV_ERROR 8
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#define ER_AC_END 16
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#define ER_DC_END 32
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#define ER_MV_END 64
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#define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
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#define ER_MB_END (ER_AC_END|ER_DC_END|ER_MV_END)
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typedef struct ERPicture {
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AVFrame *f;
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ThreadFrame *tf;
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// it is the caller's responsibility to allocate these buffers
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int16_t (*motion_val[2])[2];
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int8_t *ref_index[2];
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uint32_t *mb_type;
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int field_picture;
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} ERPicture;
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typedef struct ERContext {
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AVCodecContext *avctx;
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me_cmp_func sad;
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int mecc_inited;
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int *mb_index2xy;
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int mb_num;
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int mb_width, mb_height;
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ptrdiff_t mb_stride;
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ptrdiff_t b8_stride;
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atomic_int error_count;
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int error_occurred;
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uint8_t *error_status_table;
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uint8_t *er_temp_buffer;
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int16_t *dc_val[3];
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uint8_t *mbskip_table;
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uint8_t *mbintra_table;
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int mv[2][4][2];
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ERPicture cur_pic;
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ERPicture last_pic;
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ERPicture next_pic;
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int8_t *ref_index[2];
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int16_t (*motion_val_base[2])[2];
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uint16_t pp_time;
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uint16_t pb_time;
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int quarter_sample;
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int partitioned_frame;
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void (*decode_mb)(void *opaque, int ref, int mv_dir, int mv_type,
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int (*mv)[2][4][2],
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int mb_x, int mb_y, int mb_intra, int mb_skipped);
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void *opaque;
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} ERContext;
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void ff_er_frame_start(ERContext *s);
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void ff_er_frame_end(ERContext *s);
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void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy,
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int status);
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#endif /* AVCODEC_ERROR_RESILIENCE_H */
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