Add SubViewer v1 subtitles demuxer and decoder.

4 files changed, 127 insertions, 1 deletions

diff --git a/libavformat/Makefile b/libavformat/Makefile
index ce1d8f43fb..d77b3bd09e 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -348,6 +348,7 @@ OBJS-$(CONFIG_SPDIF_MUXER)               += spdif.o spdifenc.o
 OBJS-$(CONFIG_SRT_DEMUXER)               += srtdec.o
 OBJS-$(CONFIG_SRT_MUXER)                 += srtenc.o
 OBJS-$(CONFIG_STR_DEMUXER)               += psxstr.o
+OBJS-$(CONFIG_SUBVIEWER1_DEMUXER)        += subviewer1dec.o
 OBJS-$(CONFIG_SUBVIEWER_DEMUXER)         += subviewerdec.o
 OBJS-$(CONFIG_SWF_DEMUXER)               += swfdec.o swf.o
 OBJS-$(CONFIG_SWF_MUXER)                 += swfenc.o swf.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 42878ecab6..b3455b53fe 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -259,6 +259,7 @@ void av_register_all(void)
     REGISTER_MUXDEMUX(SPDIF,            spdif);
     REGISTER_MUXDEMUX(SRT,              srt);
     REGISTER_DEMUXER (STR,              str);
+    REGISTER_DEMUXER (SUBVIEWER1,       subviewer1);
     REGISTER_DEMUXER (SUBVIEWER,        subviewer);
     REGISTER_MUXDEMUX(SWF,              swf);
     REGISTER_DEMUXER (TAK,              tak);
diff --git a/libavformat/subviewer1dec.c b/libavformat/subviewer1dec.c
new file mode 100644
index 0000000000..0dc1942a42
--- /dev/null
+++ b/libavformat/subviewer1dec.c
@@ -0,0 +1,124 @@
+/*
+ * 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
+ * SubViewer v1 subtitle demuxer
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "subtitles.h"
+
+typedef struct {
+    FFDemuxSubtitlesQueue q;
+} SubViewer1Context;
+
+static int subviewer1_probe(AVProbeData *p)
+{
+    const unsigned char *ptr = p->buf;
+
+    if (strstr(ptr, "******** START SCRIPT ********"))
+        return AVPROBE_SCORE_MAX / 2;
+    return 0;
+}
+
+static int subviewer1_read_header(AVFormatContext *s)
+{
+    int delay = 0;
+    AVPacket *sub = NULL;
+    SubViewer1Context *subviewer1 = s->priv_data;
+    AVStream *st = avformat_new_stream(s, NULL);
+
+    if (!st)
+        return AVERROR(ENOMEM);
+    avpriv_set_pts_info(st, 64, 1, 1);
+    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+    st->codec->codec_id   = AV_CODEC_ID_SUBVIEWER1;
+
+    while (!url_feof(s->pb)) {
+        char line[4096];
+        int len = ff_get_line(s->pb, line, sizeof(line));
+        int hh, mm, ss;
+
+        if (!len)
+            break;
+
+        if (!strncmp(line, "[DELAY]", 7)) {
+            ff_get_line(s->pb, line, sizeof(line));
+            sscanf(line, "%d", &delay);
+        }
+
+        if (sscanf(line, "[%d:%d:%d]", &hh, &mm, &ss) == 3) {
+            const int64_t pos = avio_tell(s->pb);
+            int64_t pts_start = hh*3600LL + mm*60LL + ss + delay;
+
+            len = ff_get_line(s->pb, line, sizeof(line));
+            line[strcspn(line, "\r\n")] = 0;
+            if (!*line) {
+                if (sub)
+                    sub->duration = pts_start - sub->pts;
+            } else {
+                sub = ff_subtitles_queue_insert(&subviewer1->q, line, len, 0);
+                if (!sub)
+                    return AVERROR(ENOMEM);
+                sub->pos = pos;
+                sub->pts = pts_start;
+                sub->duration = -1;
+            }
+        }
+    }
+
+    ff_subtitles_queue_finalize(&subviewer1->q);
+    return 0;
+}
+
+static int subviewer1_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    SubViewer1Context *subviewer1 = s->priv_data;
+    return ff_subtitles_queue_read_packet(&subviewer1->q, pkt);
+}
+
+static int subviewer1_read_seek(AVFormatContext *s, int stream_index,
+                               int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
+{
+    SubViewer1Context *subviewer1 = s->priv_data;
+    return ff_subtitles_queue_seek(&subviewer1->q, s, stream_index,
+                                   min_ts, ts, max_ts, flags);
+}
+
+static int subviewer1_read_close(AVFormatContext *s)
+{
+    SubViewer1Context *subviewer1 = s->priv_data;
+    ff_subtitles_queue_clean(&subviewer1->q);
+    return 0;
+}
+
+AVInputFormat ff_subviewer1_demuxer = {
+    .name           = "subviewer1",
+    .long_name      = NULL_IF_CONFIG_SMALL("SubViewer v1 subtitle format"),
+    .priv_data_size = sizeof(SubViewer1Context),
+    .read_probe     = subviewer1_probe,
+    .read_header    = subviewer1_read_header,
+    .read_packet    = subviewer1_read_packet,
+    .read_seek2     = subviewer1_read_seek,
+    .read_close     = subviewer1_read_close,
+    .extensions     = "sub",
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index f3cc75a551..90d47d02d1 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 55
+#define LIBAVFORMAT_VERSION_MINOR 56
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \