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
26 #include "ass_split.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/mem.h"
30 static av_cold int ass_decode_init(AVCodecContext *avctx)
32 avctx->subtitle_header = av_malloc(avctx->extradata_size);
33 if (!avctx->subtitle_header)
34 return AVERROR(ENOMEM);
35 memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size);
36 avctx->subtitle_header_size = avctx->extradata_size;
37 avctx->priv_data = ff_ass_split(avctx->extradata);
43 static int ass_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr,
46 const char *ptr = avpkt->data;
47 int len, size = avpkt->size;
51 ASSDialog *dialog = ff_ass_split_dialog(avctx->priv_data, ptr, 0, NULL);
53 return AVERROR_INVALIDDATA;
54 duration = dialog->end - dialog->start;
55 len = ff_ass_add_rect(data, ptr, 0, duration, 1);
62 *got_sub_ptr = avpkt->size > 0;
66 static int ass_decode_close(AVCodecContext *avctx)
68 ff_ass_split_free(avctx->priv_data);
69 avctx->priv_data = NULL;
73 AVCodec ff_ass_decoder = {
75 .long_name = NULL_IF_CONFIG_SMALL("SSA (SubStation Alpha) subtitle"),
76 .type = AVMEDIA_TYPE_SUBTITLE,
77 .id = AV_CODEC_ID_SSA,
78 .init = ass_decode_init,
79 .decode = ass_decode_frame,
80 .close = ass_decode_close,