/* * SSA/ASS decoder * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <string.h> #include "avcodec.h" #include "ass.h" #include "libavutil/internal.h" #include "libavutil/mem.h" static av_cold int ass_decode_init(AVCodecContext *avctx) { avctx->subtitle_header = av_malloc(avctx->extradata_size + 1); if (!avctx->subtitle_header) return AVERROR(ENOMEM); memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size); avctx->subtitle_header[avctx->extradata_size] = 0; avctx->subtitle_header_size = avctx->extradata_size; return 0; } static int ass_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *avpkt) { AVSubtitle *sub = data; if (avpkt->size <= 0) return avpkt->size; sub->rects = av_malloc(sizeof(*sub->rects)); if (!sub->rects) return AVERROR(ENOMEM); sub->rects[0] = av_mallocz(sizeof(*sub->rects[0])); if (!sub->rects[0]) return AVERROR(ENOMEM); sub->num_rects = 1; sub->rects[0]->type = SUBTITLE_ASS; sub->rects[0]->ass = av_strdup(avpkt->data); if (!sub->rects[0]->ass) return AVERROR(ENOMEM); *got_sub_ptr = 1; return avpkt->size; } #if CONFIG_SSA_DECODER AVCodec ff_ssa_decoder = { .name = "ssa", .long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"), .type = AVMEDIA_TYPE_SUBTITLE, .id = AV_CODEC_ID_ASS, .init = ass_decode_init, .decode = ass_decode_frame, }; #endif #if CONFIG_ASS_DECODER AVCodec ff_ass_decoder = { .name = "ass", .long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"), .type = AVMEDIA_TYPE_SUBTITLE, .id = AV_CODEC_ID_ASS, .init = ass_decode_init, .decode = ass_decode_frame, }; #endif