| /* |
| * 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 */ |