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 27static 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 64FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC) 65