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77 lines
2.4 KiB
77 lines
2.4 KiB
/* |
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* Copyright (c) 2012 Clément Bœsch |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* SubViewer subtitle decoder |
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* @see https://en.wikipedia.org/wiki/SubViewer |
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*/ |
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#include "avcodec.h" |
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#include "ass.h" |
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#include "libavutil/bprint.h" |
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static int subviewer_event_to_ass(AVBPrint *buf, const char *p) |
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{ |
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while (*p) { |
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if (!strncmp(p, "[br]", 4)) { |
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av_bprintf(buf, "\\N"); |
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p += 4; |
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} else { |
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if (p[0] == '\n' && p[1]) |
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av_bprintf(buf, "\\N"); |
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else if (*p != '\n' && *p != '\r') |
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av_bprint_chars(buf, *p, 1); |
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p++; |
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} |
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} |
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return 0; |
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} |
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static int subviewer_decode_frame(AVCodecContext *avctx, |
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void *data, int *got_sub_ptr, AVPacket *avpkt) |
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{ |
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int ret = 0; |
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AVSubtitle *sub = data; |
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const char *ptr = avpkt->data; |
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FFASSDecoderContext *s = avctx->priv_data; |
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AVBPrint buf; |
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
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if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr)) |
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ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL); |
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av_bprint_finalize(&buf, NULL); |
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if (ret < 0) |
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return ret; |
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*got_sub_ptr = sub->num_rects > 0; |
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return avpkt->size; |
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} |
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const AVCodec ff_subviewer_decoder = { |
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.name = "subviewer", |
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.long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_SUBVIEWER, |
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.decode = subviewer_decode_frame, |
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.init = ff_ass_subtitle_header_default, |
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.flush = ff_ass_decoder_flush, |
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.priv_data_size = sizeof(FFASSDecoderContext), |
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};
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