blob: aaab0ffa2f604222c4ea60ecf4df445fe0c32044
1 | /* |
2 | * RAW HEVC video demuxer |
3 | * Copyright (c) 2013 Dirk Farin <dirk.farin@gmail.com> |
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 "libavcodec/hevc.h" |
23 | |
24 | #include "avformat.h" |
25 | #include "rawdec.h" |
26 | |
27 | static int hevc_probe(AVProbeData *p) |
28 | { |
29 | uint32_t code = -1; |
30 | int vps = 0, sps = 0, pps = 0, irap = 0; |
31 | int i; |
32 | |
33 | for (i = 0; i < p->buf_size - 1; i++) { |
34 | code = (code << 8) + p->buf[i]; |
35 | if ((code & 0xffffff00) == 0x100) { |
36 | uint8_t nal2 = p->buf[i + 1]; |
37 | int type = (code & 0x7E) >> 1; |
38 | |
39 | if (code & 0x81) // forbidden and reserved zero bits |
40 | return 0; |
41 | |
42 | if (nal2 & 0xf8) // reserved zero |
43 | return 0; |
44 | |
45 | switch (type) { |
46 | case HEVC_NAL_VPS: vps++; break; |
47 | case HEVC_NAL_SPS: sps++; break; |
48 | case HEVC_NAL_PPS: pps++; break; |
49 | case HEVC_NAL_BLA_N_LP: |
50 | case HEVC_NAL_BLA_W_LP: |
51 | case HEVC_NAL_BLA_W_RADL: |
52 | case HEVC_NAL_CRA_NUT: |
53 | case HEVC_NAL_IDR_N_LP: |
54 | case HEVC_NAL_IDR_W_RADL: irap++; break; |
55 | } |
56 | } |
57 | } |
58 | |
59 | if (vps && sps && pps && irap) |
60 | return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg |
61 | return 0; |
62 | } |
63 | |
64 | FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC) |
65 |