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This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
88 lines
2.7 KiB
C
88 lines
2.7 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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* RealText subtitle decoder
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* @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm
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*/
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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/avstring.h"
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#include "libavutil/bprint.h"
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static int rt_event_to_ass(AVBPrint *buf, const char *p)
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{
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int prev_chr_is_space = 1;
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while (*p) {
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if (*p != '<') {
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if (!av_isspace(*p))
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av_bprint_chars(buf, *p, 1);
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else if (!prev_chr_is_space)
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av_bprint_chars(buf, ' ', 1);
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prev_chr_is_space = av_isspace(*p);
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} else {
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const char *end = strchr(p, '>');
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if (!end)
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break;
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if (!av_strncasecmp(p, "<br/>", 5) ||
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!av_strncasecmp(p, "<br>", 4)) {
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av_bprintf(buf, "\\N");
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}
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p = end;
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}
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p++;
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}
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return 0;
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}
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static int realtext_decode_frame(AVCodecContext *avctx, AVSubtitle *sub,
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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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const char *ptr = avpkt->data;
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FFASSDecoderContext *s = avctx->priv_data;
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AVBPrint buf;
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av_bprint_init(&buf, 0, 4096);
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if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr))
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ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
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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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const FFCodec ff_realtext_decoder = {
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.p.name = "realtext",
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.p.long_name = NULL_IF_CONFIG_SMALL("RealText subtitle"),
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.p.type = AVMEDIA_TYPE_SUBTITLE,
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.p.id = AV_CODEC_ID_REALTEXT,
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FF_CODEC_DECODE_SUB_CB(realtext_decode_frame),
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.init = ff_ass_subtitle_header_default,
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.flush = ff_ass_decoder_flush,
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.priv_data_size = sizeof(FFASSDecoderContext),
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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