repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 NAL_VPS: vps++; break; | |
| 47 | case NAL_SPS: sps++; break; | |
| 48 | case NAL_PPS: pps++; break; | |
| 49 | case NAL_BLA_N_LP: | |
| 50 | case NAL_BLA_W_LP: | |
| 51 | case NAL_BLA_W_RADL: | |
| 52 | case NAL_CRA_NUT: | |
| 53 | case NAL_IDR_N_LP: | |
| 54 | case 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) |