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73 lines
2.3 KiB
73 lines
2.3 KiB
1 year ago
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/*
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* JPEG XL Header Parser
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* Copyright (c) 2023 Leo Izen <leo.izen@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_JPEGXL_PARSE_H
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#define AVCODEC_JPEGXL_PARSE_H
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#include <stdint.h>
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#include "libavutil/rational.h"
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#include "jpegxl.h"
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typedef struct FFJXLMetadata {
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uint32_t width;
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uint32_t height;
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uint32_t coded_width;
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uint32_t coded_height;
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int bit_depth;
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int have_alpha;
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/*
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* offset, in bits, of the animation header
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* zero if not animated
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*/
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int animation_offset;
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AVRational timebase;
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FFJXLColorSpace csp;
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FFJXLWhitePoint wp;
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FFJXLPrimaries primaries;
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FFJXLTransferCharacteristic trc;
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/* used by the parser */
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int xyb_encoded;
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int have_icc_profile;
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int have_timecodes;
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uint32_t num_extra_channels;
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} FFJXLMetadata;
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/*
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* copies as much of the codestream into the buffer as possible
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* pass a shorter buflen to request less
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* returns the number of bytes consumed from input, may be greater than input_len
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* if the input doesn't end on an ISOBMFF-box boundary
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*/
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int ff_jpegxl_collect_codestream_header(const uint8_t *input_buffer, int input_len,
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uint8_t *buffer, int buflen, int *copied);
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/*
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* Parse the codestream header with the provided buffer. Returns negative upon failure,
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* or the number of bits consumed upon success.
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* The FFJXLMetadata parameter may be NULL, in which case it's ignored.
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*/
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int ff_jpegxl_parse_codestream_header(const uint8_t *buf, int buflen, FFJXLMetadata *meta, int validate);
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#endif /* AVCODEC_JPEGXL_PARSE_H */
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