LCOV - code coverage report
Current view: top level - libavcodec - subviewerdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 23 24 95.8 %
Date: 2017-12-11 20:48:03 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             :  * SubViewer subtitle decoder
      24             :  * @see https://en.wikipedia.org/wiki/SubViewer
      25             :  */
      26             : 
      27             : #include "avcodec.h"
      28             : #include "ass.h"
      29             : #include "libavutil/bprint.h"
      30             : 
      31           3 : static int subviewer_event_to_ass(AVBPrint *buf, const char *p)
      32             : {
      33          59 :     while (*p) {
      34          53 :         if (!strncmp(p, "[br]", 4)) {
      35           3 :             av_bprintf(buf, "\\N");
      36           3 :             p += 4;
      37             :         } else {
      38          50 :             if (p[0] == '\n' && p[1])
      39           2 :                 av_bprintf(buf, "\\N");
      40          48 :             else if (*p != '\n' && *p != '\r')
      41          48 :                 av_bprint_chars(buf, *p, 1);
      42          50 :             p++;
      43             :         }
      44             :     }
      45             : 
      46           3 :     return 0;
      47             : }
      48             : 
      49           3 : static int subviewer_decode_frame(AVCodecContext *avctx,
      50             :                                   void *data, int *got_sub_ptr, AVPacket *avpkt)
      51             : {
      52           3 :     int ret = 0;
      53           3 :     AVSubtitle *sub = data;
      54           3 :     const char *ptr = avpkt->data;
      55           3 :     FFASSDecoderContext *s = avctx->priv_data;
      56             :     AVBPrint buf;
      57             : 
      58           3 :     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
      59           3 :     if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr))
      60           3 :         ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
      61           3 :     av_bprint_finalize(&buf, NULL);
      62           3 :     if (ret < 0)
      63           0 :         return ret;
      64           3 :     *got_sub_ptr = sub->num_rects > 0;
      65           3 :     return avpkt->size;
      66             : }
      67             : 
      68             : AVCodec ff_subviewer_decoder = {
      69             :     .name           = "subviewer",
      70             :     .long_name      = NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
      71             :     .type           = AVMEDIA_TYPE_SUBTITLE,
      72             :     .id             = AV_CODEC_ID_SUBVIEWER,
      73             :     .decode         = subviewer_decode_frame,
      74             :     .init           = ff_ass_subtitle_header_default,
      75             :     .flush          = ff_ass_decoder_flush,
      76             :     .priv_data_size = sizeof(FFASSDecoderContext),
      77             : };

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