| /* | |
| * 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 | |
| */ | |
| 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); | |