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/*
* JPEG XL Header Parser
* Copyright (c) 2023 Leo Izen <leo.izen@gmail.com>
*
* 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_JPEGXL_PARSE_H
#define AVCODEC_JPEGXL_PARSE_H
#include <stdint.h>
#include "libavutil/rational.h"
#include "jpegxl.h"
typedef struct FFJXLMetadata {
uint32_t width;
uint32_t height;
uint32_t coded_width;
uint32_t coded_height;
int bit_depth;
int have_alpha;
/*
* offset, in bits, of the animation header
* zero if not animated
*/
int animation_offset;
AVRational timebase;
FFJXLColorSpace csp;
FFJXLWhitePoint wp;
FFJXLPrimaries primaries;
FFJXLTransferCharacteristic trc;
/* used by the parser */
int xyb_encoded;
int have_icc_profile;
int have_timecodes;
uint32_t num_extra_channels;
} FFJXLMetadata;
/*
* copies as much of the codestream into the buffer as possible
* pass a shorter buflen to request less
* returns the number of bytes consumed from input, may be greater than input_len
* if the input doesn't end on an ISOBMFF-box boundary
*/
int ff_jpegxl_collect_codestream_header(const uint8_t *input_buffer, int input_len,
uint8_t *buffer, int buflen, int *copied);
/*
* Parse the codestream header with the provided buffer. Returns negative upon failure,
* or the number of bits consumed upon success.
* The FFJXLMetadata parameter may be NULL, in which case it's ignored.
*/
int ff_jpegxl_parse_codestream_header(const uint8_t *buf, int buflen, FFJXLMetadata *meta, int validate);
#endif /* AVCODEC_JPEGXL_PARSE_H */
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