diff options
author | Clément Bœsch <ubitux@gmail.com> | 2012-12-28 01:36:47 +0400 |
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committer | Clément Bœsch <ubitux@gmail.com> | 2012-12-31 01:46:42 +0400 |
commit | 5c68aae90883497d59a2a49cf75816cf5906e14a (patch) | |
tree | 83ede8ebe1751d4d3af4946ff8b8a1bd27a41c54 /libavformat/vplayerdec.c | |
parent | 5f02844c8d4fc93972932a84f0a5cbb02fe12a00 (diff) |
Add VPlayer subtitles demuxer and decoder.
Note that the linebreaks text codec option (but not the feature) has
been removed; its main goal was to allow demuxers to configure the text
decoder (and not meant to be used by users), but the AVOption are not a
viable solution. This is solved differently in this commit.
Diffstat (limited to 'libavformat/vplayerdec.c')
-rw-r--r-- | libavformat/vplayerdec.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/libavformat/vplayerdec.c b/libavformat/vplayerdec.c new file mode 100644 index 0000000000..73a48dbdc5 --- /dev/null +++ b/libavformat/vplayerdec.c @@ -0,0 +1,128 @@ +/* + * Copyright (c) 2012 Clément Bœsch + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * VPlayer subtitles format demuxer + */ + +#include "avformat.h" +#include "internal.h" +#include "subtitles.h" + +typedef struct { + FFDemuxSubtitlesQueue q; +} VPlayerContext; + +static int vplayer_probe(AVProbeData *p) +{ + char c; + const unsigned char *ptr = p->buf; + + if (sscanf(ptr, "%*d:%*d:%*d.%*d%c", &c) == 1 && strchr(": =", c)) + return AVPROBE_SCORE_MAX; + return 0; +} + +static int64_t read_ts(char **line) +{ + char c; + int hh, mm, ss, ms, len; + + if (sscanf(*line, "%d:%d:%d.%d%c%n", + &hh, &mm, &ss, &ms, &c, &len) >= 5) { + *line += len; + return (hh*3600LL + mm*60LL + ss) * 100LL + ms; + } + return AV_NOPTS_VALUE; +} + +static int vplayer_read_header(AVFormatContext *s) +{ + VPlayerContext *vplayer = s->priv_data; + AVStream *st = avformat_new_stream(s, NULL); + + if (!st) + return AVERROR(ENOMEM); + avpriv_set_pts_info(st, 64, 1, 100); + st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; + st->codec->codec_id = AV_CODEC_ID_VPLAYER; + + while (!url_feof(s->pb)) { + char line[4096]; + char *p = line; + const int64_t pos = avio_tell(s->pb); + int len = ff_get_line(s->pb, line, sizeof(line)); + int64_t pts_start; + + if (!len) + break; + + line[strcspn(line, "\r\n")] = 0; + + pts_start = read_ts(&p); + if (pts_start != AV_NOPTS_VALUE) { + AVPacket *sub; + + sub = ff_subtitles_queue_insert(&vplayer->q, p, strlen(p), 0); + if (!sub) + return AVERROR(ENOMEM); + sub->pos = pos; + sub->pts = pts_start; + sub->duration = -1; + } + } + + ff_subtitles_queue_finalize(&vplayer->q); + return 0; +} + +static int vplayer_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + VPlayerContext *vplayer = s->priv_data; + return ff_subtitles_queue_read_packet(&vplayer->q, pkt); +} + +static int vplayer_read_seek(AVFormatContext *s, int stream_index, + int64_t min_ts, int64_t ts, int64_t max_ts, int flags) +{ + VPlayerContext *vplayer = s->priv_data; + return ff_subtitles_queue_seek(&vplayer->q, s, stream_index, + min_ts, ts, max_ts, flags); +} + +static int vplayer_read_close(AVFormatContext *s) +{ + VPlayerContext *vplayer = s->priv_data; + ff_subtitles_queue_clean(&vplayer->q); + return 0; +} + +AVInputFormat ff_vplayer_demuxer = { + .name = "vplayer", + .long_name = NULL_IF_CONFIG_SMALL("VPlayer subtitles"), + .priv_data_size = sizeof(VPlayerContext), + .read_probe = vplayer_probe, + .read_header = vplayer_read_header, + .read_packet = vplayer_read_packet, + .read_seek2 = vplayer_read_seek, + .read_close = vplayer_read_close, + .extensions = "txt", +}; |