| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RAW dvbsub demuxer | ||
| 3 | * Copyright (c) 2015 Michael Niedermayer <michaelni@gmx.at> | ||
| 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 | #include "libavutil/intreadwrite.h" | ||
| 23 | |||
| 24 | #include "avformat.h" | ||
| 25 | #include "rawdec.h" | ||
| 26 | |||
| 27 | |||
| 28 | 6938 | static int dvbsub_probe(const AVProbeData *p) | |
| 29 | { | ||
| 30 | int i, j, k; | ||
| 31 | 6938 | const uint8_t *end = p->buf + p->buf_size; | |
| 32 | int type, len; | ||
| 33 | 6938 | int max_score = 0; | |
| 34 | |||
| 35 |
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142632824 | for(i=0; i<p->buf_size; i++){ |
| 36 |
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142625886 | if (p->buf[i] == 0x0f) { |
| 37 | 994147 | const uint8_t *ptr = p->buf + i; | |
| 38 | 994147 | uint8_t histogram[6] = {0}; | |
| 39 | 994147 | int min = 255; | |
| 40 |
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1008431 | for(j=0; 6 < end - ptr; j++) { |
| 41 |
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1008318 | if (*ptr != 0x0f) |
| 42 | 14182 | break; | |
| 43 | 994136 | type = ptr[1]; | |
| 44 | //page_id = AV_RB16(ptr + 2); | ||
| 45 | 994136 | len = AV_RB16(ptr + 4); | |
| 46 |
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994136 | if (type == 0x80) { |
| 47 | ; | ||
| 48 |
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992083 | } else if (type >= 0x10 && type <= 0x14) { |
| 49 | 19238 | histogram[type - 0x10] ++; | |
| 50 | } else | ||
| 51 | break; | ||
| 52 |
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21291 | if (6 + len > end - ptr) |
| 53 | 7007 | break; | |
| 54 | 14284 | ptr += 6 + len; | |
| 55 | } | ||
| 56 |
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4970735 | for (k=0; k < 4; k++) { |
| 57 | 3976588 | min = FFMIN(min, histogram[k]); | |
| 58 | } | ||
| 59 |
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994147 | if (min && j > max_score) |
| 60 | 1 | max_score = j; | |
| 61 | } | ||
| 62 | } | ||
| 63 | |||
| 64 |
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6938 | if (max_score > 5) |
| 65 | 1 | return AVPROBE_SCORE_EXTENSION; | |
| 66 | |||
| 67 | 6937 | return 0; | |
| 68 | } | ||
| 69 | |||
| 70 | FF_DEF_RAWSUB_DEMUXER(dvbsub, "raw dvbsub", dvbsub_probe, NULL, AV_CODEC_ID_DVB_SUBTITLE, AVFMT_GENERIC_INDEX) | ||
| 71 |