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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2012 Clément Bœsch |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * MPL2 subtitles decoder |
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| 24 | * |
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| 25 | * @see http://web.archive.org/web/20090328040233/http://napisy.ussbrowarek.org/mpl2-eng.html |
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| 26 | */ |
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| 27 | |||
| 28 | #include "avcodec.h" |
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| 29 | #include "ass.h" |
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| 30 | #include "libavutil/bprint.h" |
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| 31 | |||
| 32 | static int mpl2_event_to_ass(AVBPrint *buf, const char *p) |
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| 33 | { |
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| 34 | if (*p == ' ') |
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| 35 | p++; |
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| 36 | |||
| 37 | while (*p) { |
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| 38 | int got_style = 0; |
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| 39 | |||
| 40 | while (*p && strchr("/\\_", *p)) { |
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| 41 | if (*p == '/') av_bprintf(buf, "{\\i1}"); |
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| 42 | else if (*p == '\\') av_bprintf(buf, "{\\b1}"); |
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| 43 | else if (*p == '_') av_bprintf(buf, "{\\u1}"); |
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| 44 | got_style = 1; |
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| 45 | p++; |
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| 46 | } |
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| 47 | |||
| 48 | while (*p && *p != '|') { |
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| 49 | if (*p != '\r' && *p != '\n') |
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| 50 | av_bprint_chars(buf, *p, 1); |
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| 51 | p++; |
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| 52 | } |
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| 53 | |||
| 54 | if (*p == '|') { |
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| 55 | if (got_style) |
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| 56 | av_bprintf(buf, "{\\r}"); |
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| 57 | av_bprintf(buf, "\\N"); |
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| 58 | p++; |
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| 59 | } |
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| 60 | } |
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| 61 | |||
| 62 | av_bprintf(buf, "\r\n"); |
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| 63 | return 0; |
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| 64 | } |
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| 65 | |||
| 66 | static int mpl2_decode_frame(AVCodecContext *avctx, void *data, |
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| 67 | int *got_sub_ptr, AVPacket *avpkt) |
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| 68 | { |
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| 69 | AVBPrint buf; |
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| 70 | AVSubtitle *sub = data; |
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| 71 | const char *ptr = avpkt->data; |
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| 72 | const int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100}); |
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| 73 | const int ts_duration = avpkt->duration != -1 ? |
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| 74 | av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1; |
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| 75 | |||
| 76 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
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| 77 | if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr)) { |
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| 78 | if (!av_bprint_is_complete(&buf)) { |
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| 79 | av_bprint_finalize(&buf, NULL); |
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| 80 | return AVERROR(ENOMEM); |
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| 81 | } |
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| 82 | ff_ass_add_rect(sub, buf.str, ts_start, ts_duration, 0); |
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| 83 | } |
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| 84 | *got_sub_ptr = sub->num_rects > 0; |
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| 85 | av_bprint_finalize(&buf, NULL); |
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| 86 | return avpkt->size; |
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| 87 | } |
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| 88 | |||
| 89 | AVCodec ff_mpl2_decoder = { |
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| 90 | .name = "mpl2", |
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| 91 | .long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitle"), |
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| 92 | .type = AVMEDIA_TYPE_SUBTITLE, |
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| 93 | .id = AV_CODEC_ID_MPL2, |
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| 94 | .decode = mpl2_decode_frame, |
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| 95 | .init = ff_ass_subtitle_header_default, |
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| 96 | }; |