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diff --git a/media/ffvpx/libavcodec/error_resilience.h b/media/ffvpx/libavcodec/error_resilience.h
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+/*
+ * 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
+ */
+
+#ifndef AVCODEC_ERROR_RESILIENCE_H
+#define AVCODEC_ERROR_RESILIENCE_H
+
+#include <stdint.h>
+#include <stdatomic.h>
+
+#include "avcodec.h"
+#include "me_cmp.h"
+#include "threadframe.h"
+
+///< current MB is the first after a resync marker
+#define VP_START 1
+#define ER_AC_ERROR 2
+#define ER_DC_ERROR 4
+#define ER_MV_ERROR 8
+#define ER_AC_END 16
+#define ER_DC_END 32
+#define ER_MV_END 64
+
+#define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
+#define ER_MB_END (ER_AC_END|ER_DC_END|ER_MV_END)
+
+typedef struct ERPicture {
+ AVFrame *f;
+ ThreadFrame *tf;
+
+ // it is the caller's responsibility to allocate these buffers
+ int16_t (*motion_val[2])[2];
+ int8_t *ref_index[2];
+
+ uint32_t *mb_type;
+ int field_picture;
+} ERPicture;
+
+typedef struct ERContext {
+ AVCodecContext *avctx;
+
+ me_cmp_func sad;
+ int mecc_inited;
+
+ int *mb_index2xy;
+ int mb_num;
+ int mb_width, mb_height;
+ ptrdiff_t mb_stride;
+ ptrdiff_t b8_stride;
+
+ atomic_int error_count;
+ int error_occurred;
+ uint8_t *error_status_table;
+ uint8_t *er_temp_buffer;
+ int16_t *dc_val[3];
+ uint8_t *mbskip_table;
+ uint8_t *mbintra_table;
+ int mv[2][4][2];
+
+ ERPicture cur_pic;
+ ERPicture last_pic;
+ ERPicture next_pic;
+
+ int8_t *ref_index[2];
+ int16_t (*motion_val_base[2])[2];
+
+ uint16_t pp_time;
+ uint16_t pb_time;
+ int quarter_sample;
+ int partitioned_frame;
+
+ void (*decode_mb)(void *opaque, int ref, int mv_dir, int mv_type,
+ int (*mv)[2][4][2],
+ int mb_x, int mb_y, int mb_intra, int mb_skipped);
+ void *opaque;
+} ERContext;
+
+void ff_er_frame_start(ERContext *s);
+void ff_er_frame_end(ERContext *s);
+void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy,
+ int status);
+
+#endif /* AVCODEC_ERROR_RESILIENCE_H */