| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * AVS2 video stream probe. | ||
| 3 | * | ||
| 4 | * Copyright (C) 2018 Huiwen Ren, <hwrenx@126.com> | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "avformat.h" | ||
| 24 | #include "rawdec.h" | ||
| 25 | #include "libavcodec/startcode.h" | ||
| 26 | #include "libavutil/intreadwrite.h" | ||
| 27 | |||
| 28 | #define AVS2_ISSQH(x) ((x) == 0xB0) | ||
| 29 | #define AVS2_ISEND(x) ((x) == 0xB1) | ||
| 30 | #define AVS2_ISPIC(x) ((x) == 0xB3 || (x) == 0xB6) | ||
| 31 | #define AVS2_ISUNIT(x) (AVS2_ISSQH(x) || AVS2_ISEND(x) || (x) == 0xB2 || AVS2_ISPIC(x) || (x) == 0xB5 || (x) == 0xB7) | ||
| 32 | #define AVS2_ISPROFILE(x) ((x) == 0x20 || (x) == 0x22 || (x) == 0x30 || (x) == 0x32) | ||
| 33 | |||
| 34 | 7186 | static int avs2_probe(const AVProbeData *p) | |
| 35 | { | ||
| 36 | 7186 | uint32_t code = -1, hds = 0, pic = 0, seq = 0; | |
| 37 | 7186 | uint8_t state = 0; | |
| 38 | 7186 | const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size, *sqb = 0; | |
| 39 |
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7186 | if (AV_RB32(p->buf) != 0x1B0){ |
| 40 | 7138 | return 0; | |
| 41 | } | ||
| 42 | |||
| 43 |
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52 | while (ptr < end) { |
| 44 | 51 | ptr = avpriv_find_start_code(ptr, end, &code); | |
| 45 | 51 | state = code & 0xFF; | |
| 46 |
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51 | if ((code & 0xffffff00) == 0x100) { |
| 47 |
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50 | if (AVS2_ISUNIT(state)) { |
| 48 |
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49 | if (sqb && !hds) { |
| 49 | 1 | hds = ptr - sqb; | |
| 50 | } | ||
| 51 |
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49 | if (AVS2_ISSQH(state)) { |
| 52 |
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48 | if (!AVS2_ISPROFILE(*ptr)) |
| 53 | 47 | return 0; | |
| 54 | 1 | sqb = ptr; | |
| 55 | 1 | seq++; | |
| 56 |
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1 | } else if (AVS2_ISPIC(state)) { |
| 57 | 1 | pic++; | |
| 58 | ✗ | } else if (AVS2_ISEND(state)) { | |
| 59 | ✗ | break; | |
| 60 | } | ||
| 61 | } | ||
| 62 | } | ||
| 63 | } | ||
| 64 |
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1 | if (seq && hds >= 21 && pic){ |
| 65 | ✗ | return AVPROBE_SCORE_EXTENSION + 2; // more than cavs | |
| 66 | } | ||
| 67 | |||
| 68 | 1 | return 0; | |
| 69 | } | ||
| 70 | |||
| 71 | FF_DEF_RAWVIDEO_DEMUXER(avs2, "raw AVS2-P2/IEEE1857.4", avs2_probe, "avs,avs2", AV_CODEC_ID_AVS2) | ||
| 72 |