1cabdff1aSopenharmony_ci/* 2cabdff1aSopenharmony_ci * SSA/ASS encoder 3cabdff1aSopenharmony_ci * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> 4cabdff1aSopenharmony_ci * 5cabdff1aSopenharmony_ci * This file is part of FFmpeg. 6cabdff1aSopenharmony_ci * 7cabdff1aSopenharmony_ci * FFmpeg is free software; you can redistribute it and/or 8cabdff1aSopenharmony_ci * modify it under the terms of the GNU Lesser General Public 9cabdff1aSopenharmony_ci * License as published by the Free Software Foundation; either 10cabdff1aSopenharmony_ci * version 2.1 of the License, or (at your option) any later version. 11cabdff1aSopenharmony_ci * 12cabdff1aSopenharmony_ci * FFmpeg is distributed in the hope that it will be useful, 13cabdff1aSopenharmony_ci * but WITHOUT ANY WARRANTY; without even the implied warranty of 14cabdff1aSopenharmony_ci * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15cabdff1aSopenharmony_ci * Lesser General Public License for more details. 16cabdff1aSopenharmony_ci * 17cabdff1aSopenharmony_ci * You should have received a copy of the GNU Lesser General Public 18cabdff1aSopenharmony_ci * License along with FFmpeg; if not, write to the Free Software 19cabdff1aSopenharmony_ci * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20cabdff1aSopenharmony_ci */ 21cabdff1aSopenharmony_ci 22cabdff1aSopenharmony_ci#include "config_components.h" 23cabdff1aSopenharmony_ci 24cabdff1aSopenharmony_ci#include <string.h> 25cabdff1aSopenharmony_ci 26cabdff1aSopenharmony_ci#include "avcodec.h" 27cabdff1aSopenharmony_ci#include "ass.h" 28cabdff1aSopenharmony_ci#include "codec_internal.h" 29cabdff1aSopenharmony_ci#include "libavutil/avstring.h" 30cabdff1aSopenharmony_ci#include "libavutil/internal.h" 31cabdff1aSopenharmony_ci#include "libavutil/mem.h" 32cabdff1aSopenharmony_ci 33cabdff1aSopenharmony_cistatic av_cold int ass_encode_init(AVCodecContext *avctx) 34cabdff1aSopenharmony_ci{ 35cabdff1aSopenharmony_ci avctx->extradata = av_malloc(avctx->subtitle_header_size + 1); 36cabdff1aSopenharmony_ci if (!avctx->extradata) 37cabdff1aSopenharmony_ci return AVERROR(ENOMEM); 38cabdff1aSopenharmony_ci memcpy(avctx->extradata, avctx->subtitle_header, avctx->subtitle_header_size); 39cabdff1aSopenharmony_ci avctx->extradata_size = avctx->subtitle_header_size; 40cabdff1aSopenharmony_ci avctx->extradata[avctx->extradata_size] = 0; 41cabdff1aSopenharmony_ci return 0; 42cabdff1aSopenharmony_ci} 43cabdff1aSopenharmony_ci 44cabdff1aSopenharmony_cistatic int ass_encode_frame(AVCodecContext *avctx, 45cabdff1aSopenharmony_ci unsigned char *buf, int bufsize, 46cabdff1aSopenharmony_ci const AVSubtitle *sub) 47cabdff1aSopenharmony_ci{ 48cabdff1aSopenharmony_ci int i, len, total_len = 0; 49cabdff1aSopenharmony_ci 50cabdff1aSopenharmony_ci for (i=0; i<sub->num_rects; i++) { 51cabdff1aSopenharmony_ci const char *ass = sub->rects[i]->ass; 52cabdff1aSopenharmony_ci 53cabdff1aSopenharmony_ci if (sub->rects[i]->type != SUBTITLE_ASS) { 54cabdff1aSopenharmony_ci av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n"); 55cabdff1aSopenharmony_ci return AVERROR(EINVAL); 56cabdff1aSopenharmony_ci } 57cabdff1aSopenharmony_ci 58cabdff1aSopenharmony_ci len = av_strlcpy(buf+total_len, ass, bufsize-total_len); 59cabdff1aSopenharmony_ci 60cabdff1aSopenharmony_ci if (len > bufsize-total_len-1) { 61cabdff1aSopenharmony_ci av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n"); 62cabdff1aSopenharmony_ci return AVERROR_BUFFER_TOO_SMALL; 63cabdff1aSopenharmony_ci } 64cabdff1aSopenharmony_ci 65cabdff1aSopenharmony_ci total_len += len; 66cabdff1aSopenharmony_ci } 67cabdff1aSopenharmony_ci 68cabdff1aSopenharmony_ci return total_len; 69cabdff1aSopenharmony_ci} 70cabdff1aSopenharmony_ci 71cabdff1aSopenharmony_ci#if CONFIG_SSA_ENCODER 72cabdff1aSopenharmony_ciconst FFCodec ff_ssa_encoder = { 73cabdff1aSopenharmony_ci .p.name = "ssa", 74cabdff1aSopenharmony_ci .p.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"), 75cabdff1aSopenharmony_ci .p.type = AVMEDIA_TYPE_SUBTITLE, 76cabdff1aSopenharmony_ci .p.id = AV_CODEC_ID_ASS, 77cabdff1aSopenharmony_ci .init = ass_encode_init, 78cabdff1aSopenharmony_ci FF_CODEC_ENCODE_SUB_CB(ass_encode_frame), 79cabdff1aSopenharmony_ci .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 80cabdff1aSopenharmony_ci}; 81cabdff1aSopenharmony_ci#endif 82cabdff1aSopenharmony_ci 83cabdff1aSopenharmony_ci#if CONFIG_ASS_ENCODER 84cabdff1aSopenharmony_ciconst FFCodec ff_ass_encoder = { 85cabdff1aSopenharmony_ci .p.name = "ass", 86cabdff1aSopenharmony_ci .p.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"), 87cabdff1aSopenharmony_ci .p.type = AVMEDIA_TYPE_SUBTITLE, 88cabdff1aSopenharmony_ci .p.id = AV_CODEC_ID_ASS, 89cabdff1aSopenharmony_ci .init = ass_encode_init, 90cabdff1aSopenharmony_ci FF_CODEC_ENCODE_SUB_CB(ass_encode_frame), 91cabdff1aSopenharmony_ci .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 92cabdff1aSopenharmony_ci}; 93cabdff1aSopenharmony_ci#endif 94