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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 | * SubViewer subtitle decoder |
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| 24 | * @see https://en.wikipedia.org/wiki/SubViewer |
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| 25 | */ |
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| 26 | |||
| 27 | #include "avcodec.h" |
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| 28 | #include "ass.h" |
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| 29 | #include "libavutil/bprint.h" |
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| 30 | |||
| 31 | static int subviewer_event_to_ass(AVBPrint *buf, const char *p) |
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| 32 | { |
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| 33 | while (*p) { |
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| 34 | if (!strncmp(p, "[br]", 4)) { |
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| 35 | av_bprintf(buf, "\\N"); |
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| 36 | p += 4; |
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| 37 | } else { |
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| 38 | if (p[0] == '\n' && p[1]) |
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| 39 | av_bprintf(buf, "\\N"); |
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| 40 | else if (*p != '\n' && *p != '\r') |
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| 41 | av_bprint_chars(buf, *p, 1); |
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| 42 | p++; |
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| 43 | } |
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| 44 | } |
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| 45 | |||
| 46 | av_bprintf(buf, "\r\n"); |
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| 47 | return 0; |
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| 48 | } |
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| 49 | |||
| 50 | static int subviewer_decode_frame(AVCodecContext *avctx, |
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| 51 | void *data, int *got_sub_ptr, AVPacket *avpkt) |
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| 52 | { |
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| 53 | char c; |
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| 54 | AVSubtitle *sub = data; |
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| 55 | const char *ptr = avpkt->data; |
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| 56 | AVBPrint buf; |
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| 57 | |||
| 58 | /* To be removed later */ |
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| 59 | if (ptr && sscanf(ptr, "%*u:%*u:%*u.%*u,%*u:%*u:%*u.%*u%c", &c) == 1) { |
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| 60 | av_log(avctx, AV_LOG_ERROR, "AVPacket is not clean (contains timing " |
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| 61 | "information). You need to upgrade your libavformat or " |
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| 62 | "sanitize your packet.\n"); |
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| 63 | return AVERROR_INVALIDDATA; |
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| 64 | } |
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| 65 | |||
| 66 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
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| 67 | // note: no need to rescale pts & duration since they are in the same |
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| 68 | // timebase as ASS (1/100) |
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| 69 | if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr)) |
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| 70 | ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0); |
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| 71 | *got_sub_ptr = sub->num_rects > 0; |
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| 72 | av_bprint_finalize(&buf, NULL); |
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| 73 | return avpkt->size; |
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| 74 | } |
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| 75 | |||
| 76 | AVCodec ff_subviewer_decoder = { |
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| 77 | .name = "subviewer", |
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| 78 | .long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"), |
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| 79 | .type = AVMEDIA_TYPE_SUBTITLE, |
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| 80 | .id = AV_CODEC_ID_SUBVIEWER, |
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| 81 | .decode = subviewer_decode_frame, |
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| 82 | .init = ff_ass_subtitle_header_default, |
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| 83 | }; |