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6ed0d95fa2
No subtitle decoder ever modifies the AVPacket given to it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*
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* SSA/ASS decoder
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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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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#include <string.h>
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#include "avcodec.h"
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#include "ass.h"
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#include "codec_internal.h"
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#include "config_components.h"
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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static av_cold int ass_decode_init(AVCodecContext *avctx)
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{
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avctx->subtitle_header = av_malloc(avctx->extradata_size + 1);
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if (!avctx->subtitle_header)
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return AVERROR(ENOMEM);
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if (avctx->extradata_size)
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memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size);
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avctx->subtitle_header[avctx->extradata_size] = 0;
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avctx->subtitle_header_size = avctx->extradata_size;
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return 0;
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}
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static int ass_decode_frame(AVCodecContext *avctx, AVSubtitle *sub,
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int *got_sub_ptr, const AVPacket *avpkt)
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{
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if (avpkt->size <= 0)
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return avpkt->size;
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sub->rects = av_malloc(sizeof(*sub->rects));
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if (!sub->rects)
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return AVERROR(ENOMEM);
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sub->rects[0] = av_mallocz(sizeof(*sub->rects[0]));
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if (!sub->rects[0])
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return AVERROR(ENOMEM);
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sub->num_rects = 1;
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sub->rects[0]->type = SUBTITLE_ASS;
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sub->rects[0]->ass = av_strdup(avpkt->data);
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if (!sub->rects[0]->ass)
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return AVERROR(ENOMEM);
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*got_sub_ptr = 1;
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return avpkt->size;
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}
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#if CONFIG_SSA_DECODER
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const FFCodec ff_ssa_decoder = {
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.p.name = "ssa",
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.p.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_ASS,
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.init = ass_decode_init,
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FF_CODEC_DECODE_SUB_CB(ass_decode_frame),
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_ASS_DECODER
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const FFCodec ff_ass_decoder = {
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.p.name = "ass",
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.p.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_ASS,
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.init = ass_decode_init,
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FF_CODEC_DECODE_SUB_CB(ass_decode_frame),
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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