repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 | static int subviewer_event_to_ass(AVBPrint *buf, const char *p) | |
| 32 | { | |
| 33 | while (*p) { | |
| 34 | if (!strncmp(p, "[br]", 4)) { | |
| 35 | av_bprintf(buf, "\\N"); | |
| 36 | p += 4; | |
| 37 | } else { | |
| 38 | if (p[0] == '\n' && p[1]) | |
| 39 | av_bprintf(buf, "\\N"); | |
| 40 | else if (*p != '\n' && *p != '\r') | |
| 41 | av_bprint_chars(buf, *p, 1); | |
| 42 | p++; | |
| 43 | } | |
| 44 | } | |
| 45 | ||
| 46 | av_bprintf(buf, "\r\n"); | |
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 50 | static int subviewer_decode_frame(AVCodecContext *avctx, | |
| 51 | void *data, int *got_sub_ptr, AVPacket *avpkt) | |
| 52 | { | |
| 53 | char c; | |
| 54 | AVSubtitle *sub = data; | |
| 55 | const char *ptr = avpkt->data; | |
| 56 | AVBPrint buf; | |
| 57 | ||
| 58 | /* To be removed later */ | |
| 59 | if (ptr && sscanf(ptr, "%*u:%*u:%*u.%*u,%*u:%*u:%*u.%*u%c", &c) == 1) { | |
| 60 | av_log(avctx, AV_LOG_ERROR, "AVPacket is not clean (contains timing " | |
| 61 | "information). You need to upgrade your libavformat or " | |
| 62 | "sanitize your packet.\n"); | |
| 63 | return AVERROR_INVALIDDATA; | |
| 64 | } | |
| 65 | ||
| 66 | av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); | |
| 67 | // note: no need to rescale pts & duration since they are in the same | |
| 68 | // timebase as ASS (1/100) | |
| 69 | if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr)) | |
| 70 | ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0); | |
| 71 | *got_sub_ptr = sub->num_rects > 0; | |
| 72 | av_bprint_finalize(&buf, NULL); | |
| 73 | return avpkt->size; | |
| 74 | } | |
| 75 | ||
| 76 | AVCodec ff_subviewer_decoder = { | |
| 77 | .name = "subviewer", | |
| 78 | .long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"), | |
| 79 | .type = AVMEDIA_TYPE_SUBTITLE, | |
| 80 | .id = AV_CODEC_ID_SUBVIEWER, | |
| 81 | .decode = subviewer_decode_frame, | |
| 82 | .init = ff_ass_subtitle_header_default, | |
| 83 | }; |