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20f9727018
Up until now, codec.h contains both public and private parts of AVCodec. This exposes the internals of AVCodec to users and leads them into the temptation of actually using them and forces us to forward-declare structures and types that users can't use at all. This commit changes this by adding a new structure FFCodec to codec_internal.h that extends AVCodec, i.e. contains the public AVCodec as first member; the private fields of AVCodec are moved to this structure, leaving codec.h clean. Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
168 lines
5.3 KiB
C
168 lines
5.3 KiB
C
/*
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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 "config_components.h"
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#include "avcodec.h"
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#include "ass.h"
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#include "codec_internal.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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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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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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static const AVClass textsub_decoder_class = {
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.class_name = "text/vplayer/stl/pjs/subviewer1 decoder",
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.item_name = av_default_item_name,
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.option = 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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const FFCodec ff_text_decoder = {
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.p.name = "text",
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.p.long_name = NULL_IF_CONFIG_SMALL("Raw text subtitle"),
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.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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.p.priv_class = &textsub_decoder_class,
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.flush = text_flush,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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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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const FFCodec ff_vplayer_decoder = {
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.p.name = "vplayer",
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.p.long_name = NULL_IF_CONFIG_SMALL("VPlayer subtitle"),
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_VPLAYER,
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.decode = text_decode_frame,
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.init = linebreak_init,
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.p.priv_class = &textsub_decoder_class,
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.flush = text_flush,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_STL_DECODER
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const FFCodec ff_stl_decoder = {
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.p.name = "stl",
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.p.long_name = NULL_IF_CONFIG_SMALL("Spruce subtitle format"),
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_STL,
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.decode = text_decode_frame,
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.init = linebreak_init,
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.p.priv_class = &textsub_decoder_class,
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.flush = text_flush,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_PJS_DECODER
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const FFCodec ff_pjs_decoder = {
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.p.name = "pjs",
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.p.long_name = NULL_IF_CONFIG_SMALL("PJS subtitle"),
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_PJS,
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.decode = text_decode_frame,
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.init = linebreak_init,
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.p.priv_class = &textsub_decoder_class,
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.flush = text_flush,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_SUBVIEWER1_DECODER
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const FFCodec ff_subviewer1_decoder = {
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.p.name = "subviewer1",
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.p.long_name = NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"),
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.priv_data_size = sizeof(TextContext),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_SUBVIEWER1,
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.decode = text_decode_frame,
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.init = linebreak_init,
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.p.priv_class = &textsub_decoder_class,
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.flush = text_flush,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#endif /* text subtitles with '|' line break */
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