| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * MJPEG 2000 Demuxer | ||
| 3 | * Copyright (c) 2016 Ståle Kristoffersen | ||
| 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 | #include "avformat.h" | ||
| 24 | #include "rawdec.h" | ||
| 25 | |||
| 26 | 7186 | static int mjpeg2000_probe(const AVProbeData *p) | |
| 27 | { | ||
| 28 | 7186 | const uint8_t *b = p->buf; | |
| 29 | int i, marker, marker_size; | ||
| 30 | 7186 | int frames = 0, invalid = 0; | |
| 31 | |||
| 32 |
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375733987 | for (i = 0; i < p->buf_size - 5; i++) { |
| 33 |
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375726801 | if (AV_RB32(b) == 0xff4fff51){ |
| 34 | 16 | marker_size = AV_RB16(b+4); | |
| 35 |
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16 | if (marker_size + i < p->buf_size - 4) { |
| 36 | 16 | marker = AV_RB8(b+4+marker_size); | |
| 37 |
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16 | if (marker == 0xff) |
| 38 | 16 | frames++; | |
| 39 | else | ||
| 40 | ✗ | invalid++; | |
| 41 | } | ||
| 42 | } | ||
| 43 | 375726801 | b += 1; | |
| 44 | } | ||
| 45 |
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7186 | if (invalid*4 + 1 < frames) { |
| 46 | ✗ | if (invalid == 0 && frames > 2) | |
| 47 | ✗ | return AVPROBE_SCORE_EXTENSION / 2; | |
| 48 | ✗ | return AVPROBE_SCORE_EXTENSION / 4; | |
| 49 | } | ||
| 50 | 7186 | return 0; | |
| 51 | } | ||
| 52 | FF_DEF_RAWVIDEO_DEMUXER2(mjpeg_2000, "raw MJPEG 2000 video", mjpeg2000_probe, "j2k", AV_CODEC_ID_JPEG2000, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS) | ||
| 53 |