| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "codec_internal.h" | ||
| 30 | #include "decode.h" | ||
| 31 | #include "libavutil/avstring.h" | ||
| 32 | #include "libavutil/bprint.h" | ||
| 33 | |||
| 34 | 5 | static int rt_event_to_ass(AVBPrint *buf, const char *p) | |
| 35 | { | ||
| 36 | 5 | int prev_chr_is_space = 1; | |
| 37 | |||
| 38 |
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121 | while (*p) { |
| 39 |
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116 | if (*p != '<') { |
| 40 |
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107 | if (!av_isspace(*p)) |
| 41 | 85 | av_bprint_chars(buf, *p, 1); | |
| 42 |
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22 | else if (!prev_chr_is_space) |
| 43 | 20 | av_bprint_chars(buf, ' ', 1); | |
| 44 | 107 | prev_chr_is_space = av_isspace(*p); | |
| 45 | } else { | ||
| 46 | 9 | const char *end = strchr(p, '>'); | |
| 47 |
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9 | if (!end) |
| 48 | ✗ | break; | |
| 49 |
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14 | if (!av_strncasecmp(p, "<br/>", 5) || |
| 50 | 5 | !av_strncasecmp(p, "<br>", 4)) { | |
| 51 | 4 | av_bprintf(buf, "\\N"); | |
| 52 | } | ||
| 53 | 9 | p = end; | |
| 54 | } | ||
| 55 | 116 | p++; | |
| 56 | } | ||
| 57 | 5 | return 0; | |
| 58 | } | ||
| 59 | |||
| 60 | 5 | static int realtext_decode_frame(AVCodecContext *avctx, AVSubtitle *sub, | |
| 61 | int *got_sub_ptr, const AVPacket *avpkt) | ||
| 62 | { | ||
| 63 | 5 | int ret = 0; | |
| 64 | 5 | const char *ptr = ff_decode_subtitle_text(avctx, avpkt); | |
| 65 | 5 | FFASSDecoderContext *s = avctx->priv_data; | |
| 66 | AVBPrint buf; | ||
| 67 | |||
| 68 |
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5 | if (avpkt->size > 0 && !ptr) |
| 69 | ✗ | return AVERROR(ENOMEM); | |
| 70 | |||
| 71 | 5 | av_bprint_init(&buf, 0, 4096); | |
| 72 |
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5 | if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr)) |
| 73 | 5 | ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL); | |
| 74 | 5 | av_bprint_finalize(&buf, NULL); | |
| 75 |
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5 | if (ret < 0) |
| 76 | ✗ | return ret; | |
| 77 | 5 | *got_sub_ptr = sub->num_rects > 0; | |
| 78 | 5 | return avpkt->size; | |
| 79 | } | ||
| 80 | |||
| 81 | const FFCodec ff_realtext_decoder = { | ||
| 82 | .p.name = "realtext", | ||
| 83 | CODEC_LONG_NAME("RealText subtitle"), | ||
| 84 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
| 85 | .p.id = AV_CODEC_ID_REALTEXT, | ||
| 86 | FF_CODEC_DECODE_SUB_CB(realtext_decode_frame), | ||
| 87 | .init = ff_ass_subtitle_header_default, | ||
| 88 | .flush = ff_ass_decoder_flush, | ||
| 89 | .priv_data_size = sizeof(FFASSDecoderContext), | ||
| 90 | }; | ||
| 91 |