3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "ass_split.h"
26 static av_cold int ass_decode_init(AVCodecContext *avctx)
28 avctx->subtitle_header = av_malloc(avctx->extradata_size);
29 if (!avctx->subtitle_header)
30 return AVERROR(ENOMEM);
31 memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size);
32 avctx->subtitle_header_size = avctx->extradata_size;
33 avctx->priv_data = ff_ass_split(avctx->extradata);
39 static int ass_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr,
42 const char *ptr = avpkt->data;
43 int len, size = avpkt->size;
47 ASSDialog *dialog = ff_ass_split_dialog(avctx->priv_data, ptr, 0, NULL);
49 return AVERROR_INVALIDDATA;
50 duration = dialog->end - dialog->start;
51 len = ff_ass_add_rect(data, ptr, 0, duration, 1);
58 *got_sub_ptr = avpkt->size > 0;
62 static int ass_decode_close(AVCodecContext *avctx)
64 ff_ass_split_free(avctx->priv_data);
65 avctx->priv_data = NULL;
69 AVCodec ff_ass_decoder = {
71 .long_name = NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle"),
72 .type = AVMEDIA_TYPE_SUBTITLE,
74 .init = ass_decode_init,
75 .decode = ass_decode_frame,
76 .close = ass_decode_close,