mirror of https://github.com/FFmpeg/FFmpeg.git
Clément Bœsch
12 years ago
parent
949506191a
commit
a1e4e352a6
8 changed files with 157 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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* AQTitle subtitles format demuxer |
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* |
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* @see http://web.archive.org/web/20070210095721/http://www.volny.cz/aberka/czech/aqt.html
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* @see https://trac.annodex.net/wiki/AQTitle
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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/opt.h" |
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typedef struct { |
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const AVClass *class; |
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FFDemuxSubtitlesQueue q; |
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AVRational frame_rate; |
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} AQTitleContext; |
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static int aqt_probe(AVProbeData *p) |
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{ |
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int frame; |
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const char *ptr = p->buf; |
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if (sscanf(ptr, "-->> %d", &frame) == 1) |
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return AVPROBE_SCORE_MAX / 2; |
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return 0; |
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} |
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static int aqt_read_header(AVFormatContext *s) |
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{ |
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AQTitleContext *aqt = s->priv_data; |
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AVStream *st = avformat_new_stream(s, NULL); |
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int new_event = 1; |
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int64_t pos = 0, frame = AV_NOPTS_VALUE; |
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AVPacket *sub = NULL; |
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if (!st) |
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return AVERROR(ENOMEM); |
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avpriv_set_pts_info(st, 64, aqt->frame_rate.den, aqt->frame_rate.num); |
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st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
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st->codec->codec_id = AV_CODEC_ID_TEXT; |
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while (!url_feof(s->pb)) { |
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char line[4096]; |
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int len = ff_get_line(s->pb, line, sizeof(line)); |
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if (!len) |
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break; |
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line[strcspn(line, "\r\n")] = 0; |
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if (sscanf(line, "-->> %"PRId64, &frame) == 1) { |
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new_event = 1; |
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pos = avio_tell(s->pb); |
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if (sub) { |
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sub->duration = frame - sub->pts; |
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sub = NULL; |
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} |
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} else if (*line) { |
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if (!new_event) { |
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sub = ff_subtitles_queue_insert(&aqt->q, "\n", 1, 1); |
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if (!sub) |
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return AVERROR(ENOMEM); |
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} |
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sub = ff_subtitles_queue_insert(&aqt->q, line, strlen(line), !new_event); |
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if (!sub) |
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return AVERROR(ENOMEM); |
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if (new_event) { |
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sub->pts = frame; |
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sub->duration = -1; |
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sub->pos = pos; |
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} |
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new_event = 0; |
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} |
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} |
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ff_subtitles_queue_finalize(&aqt->q); |
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return 0; |
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} |
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static int aqt_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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AQTitleContext *aqt = s->priv_data; |
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return ff_subtitles_queue_read_packet(&aqt->q, pkt); |
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} |
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static int aqt_read_seek(AVFormatContext *s, int stream_index, |
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int64_t min_ts, int64_t ts, int64_t max_ts, int flags) |
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{ |
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AQTitleContext *aqt = s->priv_data; |
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return ff_subtitles_queue_seek(&aqt->q, s, stream_index, |
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min_ts, ts, max_ts, flags); |
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} |
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static int aqt_read_close(AVFormatContext *s) |
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{ |
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AQTitleContext *aqt = s->priv_data; |
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ff_subtitles_queue_clean(&aqt->q); |
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return 0; |
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} |
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#define OFFSET(x) offsetof(AQTitleContext, x) |
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#define SD AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM |
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static const AVOption aqt_options[] = { |
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{ "subfps", "set the movie frame rate", OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, {.dbl=25}, 0, INT_MAX, SD }, |
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{ NULL } |
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}; |
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static const AVClass aqt_class = { |
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.class_name = "aqtdec", |
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.item_name = av_default_item_name, |
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.option = aqt_options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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AVInputFormat ff_aqtitle_demuxer = { |
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.name = "aqtitle", |
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.long_name = NULL_IF_CONFIG_SMALL("AQTitle subtitles"), |
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.priv_data_size = sizeof(AQTitleContext), |
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.read_probe = aqt_probe, |
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.read_header = aqt_read_header, |
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.read_packet = aqt_read_packet, |
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.read_seek2 = aqt_read_seek, |
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.read_close = aqt_read_close, |
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.extensions = "aqt", |
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.priv_class = &aqt_class, |
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}; |
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@ -0,0 +1 @@ |
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e888e1354cd0968895ab89cb169fec31 |
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