1 files changed, 70 insertions, 0 deletions
diff --git a/libavformat/dvbsub.c b/libavformat/dvbsub.c
new file mode 100644
index 0000000000..3d2f704c49
--- /dev/null
+++ b/libavformat/dvbsub.c
@@ -0,0 +1,70 @@
+/*
+ * RAW dvbsub demuxer
+ * Copyright (c) 2015 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
+#include "libavutil/intreadwrite.h"
+
+#include "avformat.h"
+#include "rawdec.h"
+
+
+static int dvbsub_probe(AVProbeData *p)
+{
+    int i, j, k;
+    const uint8_t *end = p->buf + p->buf_size;
+    int type, len;
+    int max_score = 0;
+
+    for(i=0; i<p->buf_size; i++){
+        if (p->buf[i] == 0x0f) {
+            const uint8_t *ptr = p->buf + i;
+            uint8_t histogram[6] = {0};
+            int min = 255;
+            for(j=0; 6 < end - ptr; j++) {
+                if (*ptr != 0x0f)
+                    break;
+                type    = ptr[1];
+                //page_id = AV_RB16(ptr + 2);
+                len     = AV_RB16(ptr + 4);
+                if (type == 0x80) {
+                    ;
+                } else if (type >= 0x10 && type <= 0x14) {
+                    histogram[type - 0x10] ++;
+                } else
+                    break;
+                if (6 + len > end - ptr)
+                    break;
+                ptr += 6 + len;
+            }
+            for (k=0; k < 4; k++) {
+                min = FFMIN(min, histogram[k]);
+            }
+            if (min && j > max_score)
+                max_score = j;
+        }
+    }
+
+    if (max_score > 5)
+        return AVPROBE_SCORE_EXTENSION;
+
+    return 0;
+}
+
+FF_DEF_RAWSUB_DEMUXER(dvbsub, "raw dvbsub", dvbsub_probe, NULL, AV_CODEC_ID_DVB_SUBTITLE, AVFMT_GENERIC_INDEX)