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diff --git a/media/ffvpx/libavcodec/bsf_internal.h b/media/ffvpx/libavcodec/bsf_internal.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_BSF_INTERNAL_H
+#define AVCODEC_BSF_INTERNAL_H
+
+#include "libavutil/log.h"
+
+#include "bsf.h"
+#include "packet.h"
+
+typedef struct FFBitStreamFilter {
+ /**
+ * The public AVBitStreamFilter. See bsf.h for it.
+ */
+ AVBitStreamFilter p;
+
+ int priv_data_size;
+ int (*init)(AVBSFContext *ctx);
+ int (*filter)(AVBSFContext *ctx, AVPacket *pkt);
+ void (*close)(AVBSFContext *ctx);
+ void (*flush)(AVBSFContext *ctx);
+} FFBitStreamFilter;
+
+/**
+ * Called by the bitstream filters to get the next packet for filtering.
+ * The filter is responsible for either freeing the packet or passing it to the
+ * caller.
+ */
+int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt);
+
+/**
+ * Called by bitstream filters to get packet for filtering.
+ * The reference to packet is moved to provided packet structure.
+ *
+ * @param ctx pointer to AVBSFContext of filter
+ * @param pkt pointer to packet to move reference to
+ *
+ * @return 0 on success, negative AVERROR in case of failure
+ */
+int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt);
+
+const AVClass *ff_bsf_child_class_iterate(void **opaque);
+
+#endif /* AVCODEC_BSF_INTERNAL_H */