/* * 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 * MPL2 subtitles format demuxer */ #include "avformat.h" #include "internal.h" #include "subtitles.h" typedef struct { FFDemuxSubtitlesQueue q; } MPL2Context; static int mpl2_probe(AVProbeData *p) { int i; char c; int64_t start, end; const unsigned char *ptr = p->buf; const unsigned char *ptr_end = ptr + p->buf_size; for (i = 0; i < 2; i++) { if (sscanf(ptr, "[%"SCNd64"][%"SCNd64"]%c", &start, &end, &c) != 3 && sscanf(ptr, "[%"SCNd64"][]%c", &start, &c) != 2) return 0; ptr += ff_subtitles_next_line(ptr); if (ptr >= ptr_end) return 0; } return AVPROBE_SCORE_MAX; } static int read_ts(char **line, int64_t *pts_start, int *duration) { char c; int len; int64_t end; if (sscanf(*line, "[%"SCNd64"][]%c%n", pts_start, &c, &len) >= 2) { *duration = -1; *line += len - 1; return 0; } if (sscanf(*line, "[%"SCNd64"][%"SCNd64"]%c%n", pts_start, &end, &c, &len) >= 3) { *duration = end - *pts_start; *line += len - 1; return 0; } return -1; } static int mpl2_read_header(AVFormatContext *s) { MPL2Context *mpl2 = s->priv_data; AVStream *st = avformat_new_stream(s, NULL); int res = 0; if (!st) return AVERROR(ENOMEM); avpriv_set_pts_info(st, 64, 1, 10); st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; st->codec->codec_id = AV_CODEC_ID_MPL2; while (!avio_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; int duration; if (!len) break; line[strcspn(line, "\r\n")] = 0; if (!read_ts(&p, &pts_start, &duration)) { AVPacket *sub; sub = ff_subtitles_queue_insert(&mpl2->q, p, strlen(p), 0); if (!sub) return AVERROR(ENOMEM); sub->pos = pos; sub->pts = pts_start; sub->duration = duration; } } ff_subtitles_queue_finalize(s, &mpl2->q); return res; } static int mpl2_read_packet(AVFormatContext *s, AVPacket *pkt) { MPL2Context *mpl2 = s->priv_data; return ff_subtitles_queue_read_packet(&mpl2->q, pkt); } static int mpl2_read_seek(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags) { MPL2Context *mpl2 = s->priv_data; return ff_subtitles_queue_seek(&mpl2->q, s, stream_index, min_ts, ts, max_ts, flags); } static int mpl2_read_close(AVFormatContext *s) { MPL2Context *mpl2 = s->priv_data; ff_subtitles_queue_clean(&mpl2->q); return 0; } AVInputFormat ff_mpl2_demuxer = { .name = "mpl2", .long_name = NULL_IF_CONFIG_SMALL("MPL2 subtitles"), .priv_data_size = sizeof(MPL2Context), .read_probe = mpl2_probe, .read_header = mpl2_read_header, .read_packet = mpl2_read_packet, .read_seek2 = mpl2_read_seek, .read_close = mpl2_read_close, .extensions = "txt,mpl2", };