LCOV - code coverage report
Current view: top level - libavcodec - realtextdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 29 31 93.5 %
Date: 2017-12-14 08:27:08 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2012 Clément Bœsch
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : /**
      22             :  * @file
      23             :  * RealText subtitle decoder
      24             :  * @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm
      25             :  */
      26             : 
      27             : #include "avcodec.h"
      28             : #include "ass.h"
      29             : #include "libavutil/avstring.h"
      30             : #include "libavutil/bprint.h"
      31             : 
      32           5 : static int rt_event_to_ass(AVBPrint *buf, const char *p)
      33             : {
      34           5 :     int prev_chr_is_space = 1;
      35             : 
      36         126 :     while (*p) {
      37         116 :         if (*p != '<') {
      38         107 :             if (!av_isspace(*p))
      39          85 :                 av_bprint_chars(buf, *p, 1);
      40          22 :             else if (!prev_chr_is_space)
      41          20 :                 av_bprint_chars(buf, ' ', 1);
      42         107 :             prev_chr_is_space = av_isspace(*p);
      43             :         } else {
      44           9 :             const char *end = strchr(p, '>');
      45           9 :             if (!end)
      46           0 :                 break;
      47          14 :             if (!av_strncasecmp(p, "<br/>", 5) ||
      48           5 :                 !av_strncasecmp(p, "<br>",  4)) {
      49           4 :                 av_bprintf(buf, "\\N");
      50             :             }
      51           9 :             p = end;
      52             :         }
      53         116 :         p++;
      54             :     }
      55           5 :     return 0;
      56             : }
      57             : 
      58           5 : static int realtext_decode_frame(AVCodecContext *avctx,
      59             :                                  void *data, int *got_sub_ptr, AVPacket *avpkt)
      60             : {
      61           5 :     int ret = 0;
      62           5 :     AVSubtitle *sub = data;
      63           5 :     const char *ptr = avpkt->data;
      64           5 :     FFASSDecoderContext *s = avctx->priv_data;
      65             :     AVBPrint buf;
      66             : 
      67           5 :     av_bprint_init(&buf, 0, 4096);
      68           5 :     if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr))
      69           5 :         ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
      70           5 :     av_bprint_finalize(&buf, NULL);
      71           5 :     if (ret < 0)
      72           0 :         return ret;
      73           5 :     *got_sub_ptr = sub->num_rects > 0;
      74           5 :     return avpkt->size;
      75             : }
      76             : 
      77             : AVCodec ff_realtext_decoder = {
      78             :     .name           = "realtext",
      79             :     .long_name      = NULL_IF_CONFIG_SMALL("RealText subtitle"),
      80             :     .type           = AVMEDIA_TYPE_SUBTITLE,
      81             :     .id             = AV_CODEC_ID_REALTEXT,
      82             :     .decode         = realtext_decode_frame,
      83             :     .init           = ff_ass_subtitle_header_default,
      84             :     .flush          = ff_ass_decoder_flush,
      85             :     .priv_data_size = sizeof(FFASSDecoderContext),
      86             : };

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