From 5c68aae90883497d59a2a49cf75816cf5906e14a Mon Sep 17 00:00:00 2001
From: Clément Bœsch <ubitux@gmail.com>
Date: Thu, 27 Dec 2012 22:36:47 +0100
Subject: 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.
---
 libavformat/vplayerdec.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 libavformat/vplayerdec.c

(limited to 'libavformat/vplayerdec.c')

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",
+};
-- 
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