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87 lines
2.8 KiB
87 lines
2.8 KiB
/* |
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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 "internal.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, void *data, int *got_sub_ptr, |
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AVPacket *avpkt) |
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{ |
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AVSubtitle *sub = data; |
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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 AVCodec ff_ssa_decoder = { |
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.name = "ssa", |
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.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_ASS, |
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.init = ass_decode_init, |
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.decode = 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 AVCodec ff_ass_decoder = { |
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.name = "ass", |
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.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_ASS, |
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.init = ass_decode_init, |
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.decode = 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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