| /* |
| * RAW HEVC video demuxer |
| * Copyright (c) 2013 Dirk Farin <dirk.farin@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavcodec/hevc.h" |
| |
| #include "avformat.h" |
| #include "rawdec.h" |
| |
| static int hevc_probe(AVProbeData *p) |
| { |
| uint32_t code = -1; |
| int vps = 0, sps = 0, pps = 0, irap = 0; |
| int i; |
| |
| for (i = 0; i < p->buf_size - 1; i++) { |
| code = (code << 8) + p->buf[i]; |
| if ((code & 0xffffff00) == 0x100) { |
| uint8_t nal2 = p->buf[i + 1]; |
| int type = (code & 0x7E) >> 1; |
| |
| if (code & 0x81) // forbidden and reserved zero bits |
| return 0; |
| |
| if (nal2 & 0xf8) // reserved zero |
| return 0; |
| |
| switch (type) { |
| case NAL_VPS: vps++; break; |
| case NAL_SPS: sps++; break; |
| case NAL_PPS: pps++; break; |
| case NAL_BLA_N_LP: |
| case NAL_BLA_W_LP: |
| case NAL_BLA_W_RADL: |
| case NAL_CRA_NUT: |
| case NAL_IDR_N_LP: |
| case NAL_IDR_W_RADL: irap++; break; |
| } |
| } |
| } |
| |
| if (vps && sps && pps && irap) |
| return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg |
| return 0; |
| } |
| |
| FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC) |
