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-rw-r--r--libavformat/pjsdec.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/libavformat/pjsdec.c b/libavformat/pjsdec.c
new file mode 100644
index 0000000000..a88d533192
--- /dev/null
+++ b/libavformat/pjsdec.c
@@ -0,0 +1,138 @@
+/*
+ * 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
+ * PJS (Phoenix Japanimation Society) subtitles format demuxer
+ *
+ * @see http://subs.com.ru/page.php?al=pjs
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "subtitles.h"
+
+typedef struct {
+ FFDemuxSubtitlesQueue q;
+} PJSContext;
+
+static int pjs_probe(AVProbeData *p)
+{
+ char c;
+ int64_t start, end;
+ const unsigned char *ptr = p->buf;
+
+ if (sscanf(ptr, "%"SCNd64",%"SCNd64",%c", &start, &end, &c) == 3) {
+ size_t q1pos = strcspn(ptr, "\"");
+ size_t q2pos = q1pos + strcspn(ptr + q1pos + 1, "\"") + 1;
+ if (strcspn(ptr, "\r\n") > q2pos)
+ return AVPROBE_SCORE_MAX;
+ }
+ return 0;
+}
+
+static int64_t read_ts(char **line, int *duration)
+{
+ int64_t start, end;
+
+ if (sscanf(*line, "%"SCNd64",%"SCNd64, &start, &end) == 2) {
+ *line += strcspn(*line, "\"");
+ *line += !!**line;
+ *duration = end - start;
+ return start;
+ }
+ return AV_NOPTS_VALUE;
+}
+
+static int pjs_read_header(AVFormatContext *s)
+{
+ PJSContext *pjs = 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_PJS;
+
+ 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;
+
+ pts_start = read_ts(&p, &duration);
+ if (pts_start != AV_NOPTS_VALUE) {
+ AVPacket *sub;
+
+ p[strcspn(p, "\"")] = 0;
+ sub = ff_subtitles_queue_insert(&pjs->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, &pjs->q);
+ return res;
+}
+
+static int pjs_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ PJSContext *pjs = s->priv_data;
+ return ff_subtitles_queue_read_packet(&pjs->q, pkt);
+}
+
+static int pjs_read_seek(AVFormatContext *s, int stream_index,
+ int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
+{
+ PJSContext *pjs = s->priv_data;
+ return ff_subtitles_queue_seek(&pjs->q, s, stream_index,
+ min_ts, ts, max_ts, flags);
+}
+
+static int pjs_read_close(AVFormatContext *s)
+{
+ PJSContext *pjs = s->priv_data;
+ ff_subtitles_queue_clean(&pjs->q);
+ return 0;
+}
+
+AVInputFormat ff_pjs_demuxer = {
+ .name = "pjs",
+ .long_name = NULL_IF_CONFIG_SMALL("PJS (Phoenix Japanimation Society) subtitles"),
+ .priv_data_size = sizeof(PJSContext),
+ .read_probe = pjs_probe,
+ .read_header = pjs_read_header,
+ .read_packet = pjs_read_packet,
+ .read_seek2 = pjs_read_seek,
+ .read_close = pjs_read_close,
+ .extensions = "pjs",
+};