avformat/movenc: add support for AV1 streams

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/libavformat/av1.h b/libavformat/av1.h
new file mode 100644
index 0000000000..9f2a71f353
--- /dev/null
+++ b/libavformat/av1.h
@@ -0,0 +1,70 @@
+/*
+ * AV1 helper functions for muxers
+ *
+ * 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 AVFORMAT_AV1_H
+#define AVFORMAT_AV1_H
+
+#include <stdint.h>
+
+#include "avio.h"
+
+/**
+ * Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write
+ * the resulting bitstream to the provided AVIOContext.
+ *
+ * @param pb pointer to the AVIOContext where the filtered bitstream shall be
+ *           written
+ * @param buf input data buffer
+ * @param size size of the input data buffer
+ *
+ * @return the amount of bytes written in case of success, a negative AVERROR
+ *         code in case of failure
+ */
+int ff_av1_filter_obus(AVIOContext *pb, const uint8_t *buf, int size);
+
+/**
+ * Filter out AV1 OBUs not meant to be present in ISOBMFF sample data and write
+ * the resulting bitstream to a newly allocated data buffer.
+ *
+ * @param pb pointer to the AVIOContext where the filtered bitstream shall be
+ *           written
+ * @param buf input data buffer
+ * @param out pointer to pointer that will hold the allocated data buffer
+ * @param size size of the input data buffer. The size of the resulting output
+               data buffer will be written here
+ *
+ * @return the amount of bytes written in case of success, a negative AVERROR
+ *         code in case of failure. On failure, out and size are unchanged
+ */
+int ff_av1_filter_obus_buf(const uint8_t *buf, uint8_t **out, int *size);
+
+/**
+ * Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided
+ * AVIOContext.
+ *
+ * @param pb pointer to the AVIOContext where the hvcC shall be written
+ * @param buf input data buffer
+ * @param size size in bytes of the input data buffer
+ *
+ * @return >= 0 in case of success, a negative AVERROR code in case of failure
+ */
+int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size);
+
+#endif /* AVFORMAT_AV1_H */