LCOV - code coverage report
Current view: top level - libavcodec - rv34_parser.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 22 22 100.0 %
Date: 2017-12-14 01:15:32 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * RV30/40 parser
       3             :  * Copyright (c) 2011 Konstantin Shishkov
       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             : /**
      23             :  * @file
      24             :  * RV30/40 parser
      25             :  */
      26             : 
      27             : #include "parser.h"
      28             : #include "libavutil/intreadwrite.h"
      29             : 
      30             : typedef struct RV34ParseContext {
      31             :     ParseContext pc;
      32             :     int64_t key_dts;
      33             :     int key_pts;
      34             : } RV34ParseContext;
      35             : 
      36             : static const int rv_to_av_frame_type[4] = {
      37             :     AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B,
      38             : };
      39             : 
      40         550 : static int rv34_parse(AVCodecParserContext *s,
      41             :                       AVCodecContext *avctx,
      42             :                       const uint8_t **poutbuf, int *poutbuf_size,
      43             :                       const uint8_t *buf, int buf_size)
      44             : {
      45         550 :     RV34ParseContext *pc = s->priv_data;
      46             :     int type, pts, hdr;
      47             : 
      48         550 :     if (buf_size < 13 + *buf * 8) {
      49           3 :         *poutbuf = buf;
      50           3 :         *poutbuf_size = buf_size;
      51           3 :         return buf_size;
      52             :     }
      53             : 
      54         547 :     hdr = AV_RB32(buf + 9 + *buf * 8);
      55         547 :     if (avctx->codec_id == AV_CODEC_ID_RV30) {
      56         244 :         type = (hdr >> 27) & 3;
      57         244 :         pts  = (hdr >>  7) & 0x1FFF;
      58             :     } else {
      59         303 :         type = (hdr >> 29) & 3;
      60         303 :         pts  = (hdr >>  6) & 0x1FFF;
      61             :     }
      62             : 
      63         547 :     if (type != 3 && s->pts != AV_NOPTS_VALUE) {
      64         158 :         pc->key_dts = s->pts;
      65         158 :         pc->key_pts = pts;
      66             :     } else {
      67         389 :         if (type != 3)
      68           2 :             s->pts = pc->key_dts + ((pts - pc->key_pts) & 0x1FFF);
      69             :         else
      70         387 :             s->pts = pc->key_dts - ((pc->key_pts - pts) & 0x1FFF);
      71             :     }
      72         547 :     s->pict_type = rv_to_av_frame_type[type];
      73             : 
      74         547 :     *poutbuf = buf;
      75         547 :     *poutbuf_size = buf_size;
      76         547 :     return buf_size;
      77             : }
      78             : 
      79             : #if CONFIG_RV30_PARSER
      80             : AVCodecParser ff_rv30_parser = {
      81             :     .codec_ids      = { AV_CODEC_ID_RV30 },
      82             :     .priv_data_size = sizeof(RV34ParseContext),
      83             :     .parser_parse   = rv34_parse,
      84             : };
      85             : #endif
      86             : 
      87             : #if CONFIG_RV40_PARSER
      88             : AVCodecParser ff_rv40_parser = {
      89             :     .codec_ids      = { AV_CODEC_ID_RV40 },
      90             :     .priv_data_size = sizeof(RV34ParseContext),
      91             :     .parser_parse   = rv34_parse,
      92             : };
      93             : #endif

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