LCOV - code coverage report
Current view: top level - src/libavformat - cavsvideodec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 24 25 96.0 %
Date: 2017-01-24 04:42:20 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * RAW Chinese AVS video demuxer
       3             :  * Copyright (c) 2009  Stefan Gehrer <stefan.gehrer@gmx.de>
       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 "avformat.h"
      23             : #include "rawdec.h"
      24             : #include "libavcodec/internal.h"
      25             : 
      26             : #define CAVS_SEQ_START_CODE       0x000001b0
      27             : #define CAVS_PIC_I_START_CODE     0x000001b3
      28             : #define CAVS_UNDEF_START_CODE     0x000001b4
      29             : #define CAVS_PIC_PB_START_CODE    0x000001b6
      30             : #define CAVS_VIDEO_EDIT_CODE      0x000001b7
      31             : #define CAVS_PROFILE_JIZHUN       0x20
      32             : 
      33        5563 : static int cavsvideo_probe(AVProbeData *p)
      34             : {
      35        5563 :     uint32_t code= -1;
      36        5563 :     int pic=0, seq=0, slice_pos = 0;
      37        5563 :     const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size;
      38             : 
      39       25742 :     while (ptr < end) {
      40       15770 :         ptr = avpriv_find_start_code(ptr, end, &code);
      41       15770 :         if ((code & 0xffffff00) == 0x100) {
      42       11409 :             if(code < CAVS_SEQ_START_CODE) {
      43             :                 /* slices have to be consecutive */
      44       10575 :                 if(code < slice_pos)
      45         705 :                     return 0;
      46        9870 :                 slice_pos = code;
      47             :             } else {
      48         834 :                 slice_pos = 0;
      49             :             }
      50       10704 :             if (code == CAVS_SEQ_START_CODE) {
      51          53 :                 seq++;
      52             :                 /* check for the only currently supported profile */
      53          53 :                 if (*ptr != CAVS_PROFILE_JIZHUN)
      54          53 :                     return 0;
      55       21104 :             } else if ((code == CAVS_PIC_I_START_CODE) ||
      56       10453 :                        (code == CAVS_PIC_PB_START_CODE)) {
      57         214 :                 pic++;
      58       20873 :             } else if ((code == CAVS_UNDEF_START_CODE) ||
      59       10436 :                        (code >  CAVS_VIDEO_EDIT_CODE)) {
      60         396 :                 return 0;
      61             :             }
      62             :         }
      63             :     }
      64        4409 :     if(seq && seq*9<=pic*10)
      65           0 :         return AVPROBE_SCORE_EXTENSION+1;
      66        4409 :     return 0;
      67             : }
      68             : 
      69             : FF_DEF_RAWVIDEO_DEMUXER(cavsvideo, "raw Chinese AVS (Audio Video Standard)", cavsvideo_probe, NULL, AV_CODEC_ID_CAVS)

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