| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * XBM parser | ||
| 3 | * Copyright (c) 2021 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 | * XBM parser | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include <stdint.h> | ||
| 28 | |||
| 29 | #include "libavutil/attributes.h" | ||
| 30 | #include "libavutil/avutil.h" | ||
| 31 | |||
| 32 | #include "parser.h" | ||
| 33 | |||
| 34 | typedef struct XBMParseContext { | ||
| 35 | ParseContext pc; | ||
| 36 | uint16_t state16; | ||
| 37 | int count; | ||
| 38 | } XBMParseContext; | ||
| 39 | |||
| 40 | #define KEY (((uint64_t)'\n' << 56) | ((uint64_t)'#' << 48) | \ | ||
| 41 | ((uint64_t)'d' << 40) | ((uint64_t)'e' << 32) | \ | ||
| 42 | ((uint64_t)'f' << 24) | ('i' << 16) | ('n' << 8) | \ | ||
| 43 | ('e' << 0)) | ||
| 44 | |||
| 45 | #define END ((';' << 8) | ('\n' << 0)) | ||
| 46 | |||
| 47 | 4 | static av_cold int xbm_init(AVCodecParserContext *s) | |
| 48 | { | ||
| 49 | 4 | XBMParseContext *bpc = s->priv_data; | |
| 50 | |||
| 51 | 4 | bpc->count = 1; | |
| 52 | |||
| 53 | 4 | return 0; | |
| 54 | } | ||
| 55 | |||
| 56 | 529 | static int xbm_parse(AVCodecParserContext *s, AVCodecContext *avctx, | |
| 57 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 58 | const uint8_t *buf, int buf_size) | ||
| 59 | { | ||
| 60 | 529 | XBMParseContext *bpc = s->priv_data; | |
| 61 | 529 | uint64_t state = bpc->pc.state64; | |
| 62 | 529 | uint16_t state16 = bpc->state16; | |
| 63 | 529 | int next = END_NOT_FOUND, i = 0; | |
| 64 | |||
| 65 | 529 | s->pict_type = AV_PICTURE_TYPE_I; | |
| 66 | 529 | s->key_frame = 1; | |
| 67 | 529 | s->duration = 1; | |
| 68 | |||
| 69 | 529 | *poutbuf_size = 0; | |
| 70 | 529 | *poutbuf = NULL; | |
| 71 | |||
| 72 |
2/2✓ Branch 0 taken 1939446 times.
✓ Branch 1 taken 478 times.
|
1939924 | for (; i < buf_size; i++) { |
| 73 | 1939446 | state = (state << 8) | buf[i]; | |
| 74 | 1939446 | state16 = (state16 << 8) | buf[i]; | |
| 75 | |||
| 76 |
2/2✓ Branch 0 taken 52 times.
✓ Branch 1 taken 1939394 times.
|
1939446 | if (state == KEY) |
| 77 | 52 | bpc->count++; | |
| 78 | |||
| 79 |
4/4✓ Branch 0 taken 52 times.
✓ Branch 1 taken 1939394 times.
✓ Branch 2 taken 24 times.
✓ Branch 3 taken 28 times.
|
1939446 | if ((state == KEY && bpc->count == 1)) { |
| 80 | 24 | next = i - 6; | |
| 81 | 24 | break; | |
| 82 |
2/2✓ Branch 0 taken 27 times.
✓ Branch 1 taken 1939395 times.
|
1939422 | } else if (state16 == END) { |
| 83 | 27 | next = i + 1; | |
| 84 | 27 | bpc->count = 0; | |
| 85 | 27 | break; | |
| 86 | } | ||
| 87 | } | ||
| 88 | |||
| 89 | 529 | bpc->pc.state64 = state; | |
| 90 | 529 | bpc->state16 = state16; | |
| 91 |
2/2✓ Branch 1 taken 474 times.
✓ Branch 2 taken 55 times.
|
529 | if (ff_combine_frame(&bpc->pc, next, &buf, &buf_size) < 0) { |
| 92 | 474 | *poutbuf = NULL; | |
| 93 | 474 | *poutbuf_size = 0; | |
| 94 | 474 | return buf_size; | |
| 95 | } | ||
| 96 | |||
| 97 | 55 | *poutbuf = buf; | |
| 98 | 55 | *poutbuf_size = buf_size; | |
| 99 | |||
| 100 | 55 | return next; | |
| 101 | } | ||
| 102 | |||
| 103 | const AVCodecParser ff_xbm_parser = { | ||
| 104 | .codec_ids = { AV_CODEC_ID_XBM }, | ||
| 105 | .priv_data_size = sizeof(XBMParseContext), | ||
| 106 | .parser_init = xbm_init, | ||
| 107 | .parser_parse = xbm_parse, | ||
| 108 | .parser_close = ff_parse_close, | ||
| 109 | }; | ||
| 110 |