LCOV - code coverage report
Current view: top level - libavformat - hevcdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 21 21 100.0 %
Date: 2017-12-16 13:57:32 Functions: 1 1 100.0 %

          Line data    Source code
       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        6130 : static int hevc_probe(AVProbeData *p)
      28             : {
      29        6130 :     uint32_t code = -1;
      30        6130 :     int vps = 0, sps = 0, pps = 0, irap = 0;
      31             :     int i;
      32             : 
      33   109279594 :     for (i = 0; i < p->buf_size - 1; i++) {
      34   109275196 :         code = (code << 8) + p->buf[i];
      35   109275196 :         if ((code & 0xffffff00) == 0x100) {
      36        7405 :             uint8_t nal2 = p->buf[i + 1];
      37        7405 :             int type = (code & 0x7E) >> 1;
      38             : 
      39        7405 :             if (code & 0x81) // forbidden and reserved zero bits
      40         926 :                 return 0;
      41             : 
      42        6479 :             if (nal2 & 0xf8) // reserved zero
      43         806 :                 return 0;
      44             : 
      45        5673 :             switch (type) {
      46         201 :             case HEVC_NAL_VPS:        vps++;  break;
      47         292 :             case HEVC_NAL_SPS:        sps++;  break;
      48         252 :             case HEVC_NAL_PPS:        pps++;  break;
      49         206 :             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         206 :             case HEVC_NAL_IDR_W_RADL: irap++; break;
      55             :             }
      56             :         }
      57             :     }
      58             : 
      59        4398 :     if (vps && sps && pps && irap)
      60         183 :         return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
      61        4215 :     return 0;
      62             : }
      63             : 
      64             : FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC)

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