| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * QOI parser | ||
| 3 | * Copyright (c) 2022 Paul B Mahol | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /** | ||
| 23 | * @file | ||
| 24 | * QOI parser | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "parser.h" | ||
| 28 | |||
| 29 | typedef struct QOIParseContext { | ||
| 30 | ParseContext pc; | ||
| 31 | } QOIParseContext; | ||
| 32 | |||
| 33 | 1901 | static int qoi_parse(AVCodecParserContext *s, AVCodecContext *avctx, | |
| 34 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 35 | const uint8_t *buf, int buf_size) | ||
| 36 | { | ||
| 37 | 1901 | QOIParseContext *ipc = s->priv_data; | |
| 38 | 1901 | uint64_t state = ipc->pc.state64; | |
| 39 | 1901 | int next = END_NOT_FOUND, i = 0; | |
| 40 | |||
| 41 | 1901 | s->pict_type = AV_PICTURE_TYPE_NONE; | |
| 42 | 1901 | s->duration = 1; | |
| 43 | |||
| 44 | 1901 | *poutbuf_size = 0; | |
| 45 | 1901 | *poutbuf = NULL; | |
| 46 | |||
| 47 |
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1901 | if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { |
| 48 | ✗ | next = buf_size; | |
| 49 | } else { | ||
| 50 |
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7683283 | for (; i < buf_size; i++) { |
| 51 | 7681407 | state = (state << 8) | buf[i]; | |
| 52 |
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7681407 | if (state == 0x01LL) { |
| 53 | 25 | next = i + 1; | |
| 54 | 25 | break; | |
| 55 | } | ||
| 56 | } | ||
| 57 | |||
| 58 | 1901 | ipc->pc.state64 = state; | |
| 59 |
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1901 | if (ff_combine_frame(&ipc->pc, next, &buf, &buf_size) < 0) { |
| 60 | 1875 | *poutbuf = NULL; | |
| 61 | 1875 | *poutbuf_size = 0; | |
| 62 | 1875 | return buf_size; | |
| 63 | } | ||
| 64 | } | ||
| 65 | |||
| 66 | 26 | *poutbuf = buf; | |
| 67 | 26 | *poutbuf_size = buf_size; | |
| 68 | |||
| 69 | 26 | return next; | |
| 70 | } | ||
| 71 | |||
| 72 | const AVCodecParser ff_qoi_parser = { | ||
| 73 | .codec_ids = { AV_CODEC_ID_QOI }, | ||
| 74 | .priv_data_size = sizeof(QOIParseContext), | ||
| 75 | .parser_parse = qoi_parse, | ||
| 76 | .parser_close = ff_parse_close, | ||
| 77 | }; | ||
| 78 |