/*
  * 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"
 

 typedef struct AV1SequenceParameters {

     uint8_t profile;
     uint8_t level;
     uint8_t tier;

     uint8_t bitdepth;

     uint8_t monochrome;
     uint8_t chroma_subsampling_x;
     uint8_t chroma_subsampling_y;
     uint8_t chroma_sample_position;
     uint8_t color_description_present_flag;
     uint8_t color_primaries;
     uint8_t transfer_characteristics;
     uint8_t matrix_coefficients;
     uint8_t color_range;
 } AV1SequenceParameters;
 

 /**
  * 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 return
  * the result in a data buffer, avoiding allocations and copies if possible.

  *

  * @param in input data buffer

  * @param out pointer to pointer for the returned buffer. In case of success,
  *            it is independently allocated if and only if `*out` differs from in.

  * @param size size of the input data buffer. The size of the resulting output

  *             data buffer will be written here

  * @param offset offset of the returned data inside `*out`: It runs from
  *               `*out + offset` (inclusive) to `*out + offset + size`
  *               (exclusive); is zero if `*out` is independently allocated.

  *

  * @return 0 in case of success, a negative AVERROR code in case of failure.

  *         On failure, *out and *size are unchanged

  * @note *out will be treated as unintialized on input and will not be freed.

  */

 int ff_av1_filter_obus_buf(const uint8_t *in, uint8_t **out,
                            int *size, int *offset);

 
 /**

  * Parses a Sequence Header from the the provided buffer.
  *
  * @param seq pointer to the AV1SequenceParameters where the parsed values will
  *            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_av1_parse_seq_header(AV1SequenceParameters *seq, const uint8_t *buf, int size);
 
 /**

  * Writes AV1 extradata (Sequence Header and Metadata OBUs) to the provided
  * AVIOContext.
  *

  * @param pb pointer to the AVIOContext where the av1C box 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 */