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/* |
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* Copyright (c) 2012 Clément Bœsch |
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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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/** |
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* @file |
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* Raw subtitles decoder |
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*/ |
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#include "avcodec.h" |
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#include "ass.h" |
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#include "libavutil/bprint.h" |
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#include "libavutil/opt.h" |
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typedef struct { |
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AVClass *class; |
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const char *linebreaks; |
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int keep_ass_markup; |
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int readorder; |
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} TextContext; |
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#define OFFSET(x) offsetof(TextContext, x) |
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#define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM |
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static const AVOption options[] = { |
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{ "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags=SD }, |
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{ NULL } |
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}; |
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static int text_decode_frame(AVCodecContext *avctx, void *data, |
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int *got_sub_ptr, AVPacket *avpkt) |
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{ |
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int ret = 0; |
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AVBPrint buf; |
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AVSubtitle *sub = data; |
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const char *ptr = avpkt->data; |
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TextContext *text = avctx->priv_data; |
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
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✓✗✓✗ ✓✗ |
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if (ptr && avpkt->size > 0 && *ptr) { |
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ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup); |
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ret = ff_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL); |
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} |
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av_bprint_finalize(&buf, NULL); |
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✗✓ |
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if (ret < 0) |
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return ret; |
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*got_sub_ptr = sub->num_rects > 0; |
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return avpkt->size; |
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} |
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static void text_flush(AVCodecContext *avctx) |
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{ |
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TextContext *text = avctx->priv_data; |
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if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP)) |
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text->readorder = 0; |
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} |
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#define DECLARE_CLASS(decname) static const AVClass decname ## _decoder_class = { \ |
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.class_name = #decname " decoder", \ |
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.item_name = av_default_item_name, \ |
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.option = decname ## _options, \ |
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.version = LIBAVUTIL_VERSION_INT, \ |
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} |
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#if CONFIG_TEXT_DECODER |
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#define text_options options |
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DECLARE_CLASS(text); |
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AVCodec ff_text_decoder = { |
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.name = "text", |
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.long_name = NULL_IF_CONFIG_SMALL("Raw text subtitle"), |
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.priv_data_size = sizeof(TextContext), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_TEXT, |
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.decode = text_decode_frame, |
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.init = ff_ass_subtitle_header_default, |
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.priv_class = &text_decoder_class, |
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.flush = text_flush, |
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}; |
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#endif |
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#if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER || CONFIG_STL_DECODER |
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static int linebreak_init(AVCodecContext *avctx) |
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{ |
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TextContext *text = avctx->priv_data; |
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text->linebreaks = "|"; |
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return ff_ass_subtitle_header_default(avctx); |
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} |
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#if CONFIG_VPLAYER_DECODER |
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#define vplayer_options options |
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DECLARE_CLASS(vplayer); |
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AVCodec ff_vplayer_decoder = { |
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.name = "vplayer", |
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.long_name = NULL_IF_CONFIG_SMALL("VPlayer subtitle"), |
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.priv_data_size = sizeof(TextContext), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_VPLAYER, |
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.decode = text_decode_frame, |
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.init = linebreak_init, |
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.priv_class = &vplayer_decoder_class, |
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.flush = text_flush, |
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}; |
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#endif |
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#if CONFIG_STL_DECODER |
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#define stl_options options |
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DECLARE_CLASS(stl); |
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AVCodec ff_stl_decoder = { |
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.name = "stl", |
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.long_name = NULL_IF_CONFIG_SMALL("Spruce subtitle format"), |
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.priv_data_size = sizeof(TextContext), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_STL, |
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.decode = text_decode_frame, |
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.init = linebreak_init, |
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.priv_class = &stl_decoder_class, |
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.flush = text_flush, |
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}; |
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#endif |
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#if CONFIG_PJS_DECODER |
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#define pjs_options options |
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DECLARE_CLASS(pjs); |
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AVCodec ff_pjs_decoder = { |
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.name = "pjs", |
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.long_name = NULL_IF_CONFIG_SMALL("PJS subtitle"), |
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.priv_data_size = sizeof(TextContext), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_PJS, |
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.decode = text_decode_frame, |
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.init = linebreak_init, |
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.priv_class = &pjs_decoder_class, |
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.flush = text_flush, |
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}; |
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#endif |
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#if CONFIG_SUBVIEWER1_DECODER |
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#define subviewer1_options options |
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DECLARE_CLASS(subviewer1); |
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AVCodec ff_subviewer1_decoder = { |
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.name = "subviewer1", |
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.long_name = NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"), |
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.priv_data_size = sizeof(TextContext), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = AV_CODEC_ID_SUBVIEWER1, |
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.decode = text_decode_frame, |
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.init = linebreak_init, |
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.priv_class = &subviewer1_decoder_class, |
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.flush = text_flush, |
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}; |
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#endif |
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#endif /* text subtitles with '|' line break */ |