/* * 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; may be NULL, in which case nothing is written. * @param buf input data buffer * @param size size of the input data buffer * * @return the amount of bytes written (or would have been written in case * pb had been supplied) in case of success, a negative AVERROR * code in case of failure * @note One can use NULL for pb to just get the output size. */ 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 * @param write_seq_header If 1, Sequence Header OBU will be written inside the * av1C box. Otherwise, Sequence Header OBU will be omitted. * * @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, int write_seq_header); #endif /* AVFORMAT_AV1_H */