| /* |
| * 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); |
| if (avctx->extradata_size) |
| 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 |