| /* |
| * SSA/ASS encoder |
| * 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 "config_components.h" |
| |
| #include <string.h> |
| |
| #include "avcodec.h" |
| #include "ass.h" |
| #include "codec_internal.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/mem.h" |
| |
| static av_cold int ass_encode_init(AVCodecContext *avctx) |
| { |
| avctx->extradata = av_malloc(avctx->subtitle_header_size + 1); |
| if (!avctx->extradata) |
| return AVERROR(ENOMEM); |
| memcpy(avctx->extradata, avctx->subtitle_header, avctx->subtitle_header_size); |
| avctx->extradata_size = avctx->subtitle_header_size; |
| avctx->extradata[avctx->extradata_size] = 0; |
| return 0; |
| } |
| |
| static int ass_encode_frame(AVCodecContext *avctx, |
| unsigned char *buf, int bufsize, |
| const AVSubtitle *sub) |
| { |
| size_t len; |
| |
| if (sub->num_rects != 1) { |
| av_log(avctx, AV_LOG_ERROR, "Only one rect per AVSubtitle is supported in ASS.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (sub->rects[0]->type != SUBTITLE_ASS) { |
| av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| len = av_strlcpy(buf, sub->rects[0]->ass, bufsize); |
| |
| if (len >= bufsize) { |
| av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n"); |
| return AVERROR_BUFFER_TOO_SMALL; |
| } |
| |
| return len; |
| } |
| |
| #if CONFIG_SSA_ENCODER |
| const FFCodec ff_ssa_encoder = { |
| .p.name = "ssa", |
| CODEC_LONG_NAME("ASS (Advanced SubStation Alpha) subtitle"), |
| .p.type = AVMEDIA_TYPE_SUBTITLE, |
| .p.id = AV_CODEC_ID_ASS, |
| .init = ass_encode_init, |
| FF_CODEC_ENCODE_SUB_CB(ass_encode_frame), |
| }; |
| #endif |
| |
| #if CONFIG_ASS_ENCODER |
| const FFCodec ff_ass_encoder = { |
| .p.name = "ass", |
| CODEC_LONG_NAME("ASS (Advanced SubStation Alpha) subtitle"), |
| .p.type = AVMEDIA_TYPE_SUBTITLE, |
| .p.id = AV_CODEC_ID_ASS, |
| .init = ass_encode_init, |
| FF_CODEC_ENCODE_SUB_CB(ass_encode_frame), |
| }; |
| #endif |