mirror of https://github.com/FFmpeg/FFmpeg.git
Clément Bœsch
13 years ago
parent
53640f42be
commit
439e32f9b8
13 changed files with 241 additions and 2 deletions
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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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* 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 "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 (!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 = 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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av_bprintf(buf, "\r\n"); |
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return 0; |
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} |
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static int realtext_decode_frame(AVCodecContext *avctx, |
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void *data, int *got_sub_ptr, AVPacket *avpkt) |
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{ |
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AVSubtitle *sub = data; |
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const char *ptr = avpkt->data; |
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AVBPrint buf; |
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av_bprint_init(&buf, 0, 4096); |
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// note: no need to rescale pts & duration since they are in the same
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// timebase than ASS (1/100)
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if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr)) |
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ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0); |
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*got_sub_ptr = sub->num_rects > 0; |
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av_bprint_finalize(&buf, NULL); |
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return avpkt->size; |
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} |
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AVCodec ff_realtext_decoder = { |
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.name = "realtext", |
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.long_name = NULL_IF_CONFIG_SMALL("RealText subtitle"), |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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.id = CODEC_ID_REALTEXT, |
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.decode = realtext_decode_frame, |
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.init = ff_ass_subtitle_header_default, |
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}; |
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@ -0,0 +1,145 @@ |
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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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* RealText subtitle demuxer |
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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 "avformat.h" |
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#include "internal.h" |
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#include "subtitles.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/bprint.h" |
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#include "libavutil/intreadwrite.h" |
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typedef struct { |
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FFDemuxSubtitlesQueue q; |
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} RealTextContext; |
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static int realtext_probe(AVProbeData *p) |
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{ |
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const unsigned char *ptr = p->buf; |
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if (AV_RB24(ptr) == 0xEFBBBF) |
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ptr += 3; /* skip UTF-8 BOM */ |
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return !av_strncasecmp(ptr, "<window", 7) ? AVPROBE_SCORE_MAX/2 : 0; |
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} |
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static int read_ts(const char *s) |
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{ |
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int hh, mm, ss, ms; |
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if (sscanf(s, "%u:%u:%u.%u", &hh, &mm, &ss, &ms) == 4) return (hh*3600 + mm*60 + ss) * 100 + ms; |
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if (sscanf(s, "%u:%u:%u" , &hh, &mm, &ss ) == 3) return (hh*3600 + mm*60 + ss) * 100; |
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if (sscanf(s, "%u:%u.%u", &mm, &ss, &ms) == 3) return ( mm*60 + ss) * 100 + ms; |
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if (sscanf(s, "%u:%u" , &mm, &ss ) == 2) return ( mm*60 + ss) * 100; |
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if (sscanf(s, "%u.%u", &ss, &ms) == 2) return ( ss) * 100 + ms; |
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return strtol(s, NULL, 10) * 100; |
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} |
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static int realtext_read_header(AVFormatContext *s) |
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{ |
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RealTextContext *rt = s->priv_data; |
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AVStream *st = avformat_new_stream(s, NULL); |
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AVBPrint buf; |
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char c = 0; |
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int res = 0, duration = read_ts("60"); // default duration is 60 seconds
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if (!st) |
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return AVERROR(ENOMEM); |
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avpriv_set_pts_info(st, 64, 1, 100); |
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st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
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st->codec->codec_id = CODEC_ID_REALTEXT; |
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
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while (!url_feof(s->pb)) { |
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AVPacket *sub; |
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const int64_t pos = avio_tell(s->pb) - (c != 0); |
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int n = ff_smil_extract_next_chunk(s->pb, &buf, &c); |
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if (n == 0) |
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break; |
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if (!av_strncasecmp(buf.str, "<window", 7)) { |
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/* save header to extradata */ |
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const char *p = ff_smil_get_attr_ptr(buf.str, "duration"); |
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if (p) |
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duration = read_ts(p); |
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st->codec->extradata = av_strdup(buf.str); |
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if (!st->codec->extradata) { |
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res = AVERROR(ENOMEM); |
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goto end; |
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} |
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st->codec->extradata_size = buf.len + 1; |
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} else { |
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/* if we just read a <time> tag, introduce a new event, otherwise merge
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* with the previous one */ |
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int merge = !av_strncasecmp(buf.str, "<time", 5) ? 0 : 1; |
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sub = ff_subtitles_queue_insert(&rt->q, buf.str, buf.len, merge); |
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if (!sub) { |
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res = AVERROR(ENOMEM); |
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goto end; |
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} |
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if (!merge) { |
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const char *begin = ff_smil_get_attr_ptr(buf.str, "begin"); |
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const char *end = ff_smil_get_attr_ptr(buf.str, "end"); |
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sub->pos = pos; |
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sub->pts = begin ? read_ts(begin) : 0; |
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sub->duration = end ? (read_ts(end) - sub->pts) : duration; |
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} |
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} |
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av_bprint_clear(&buf); |
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} |
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ff_subtitles_queue_finalize(&rt->q); |
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end: |
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av_bprint_finalize(&buf, NULL); |
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return res; |
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} |
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static int realtext_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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RealTextContext *rt = s->priv_data; |
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return ff_subtitles_queue_read_packet(&rt->q, pkt); |
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} |
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static int realtext_read_close(AVFormatContext *s) |
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{ |
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RealTextContext *rt = s->priv_data; |
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ff_subtitles_queue_clean(&rt->q); |
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return 0; |
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} |
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AVInputFormat ff_realtext_demuxer = { |
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.name = "realtext", |
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.long_name = NULL_IF_CONFIG_SMALL("RealText subtitle format"), |
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.priv_data_size = sizeof(RealTextContext), |
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.read_probe = realtext_probe, |
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.read_header = realtext_read_header, |
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.read_packet = realtext_read_packet, |
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.read_close = realtext_read_close, |
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.flags = AVFMT_GENERIC_INDEX, |
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.extensions = "rt", |
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}; |
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@ -0,0 +1 @@ |
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5366f62be001f6fd4a7f48893828bf51 |
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