ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/diracdec.c

@@ -0,0 +1,43 @@
+/*
+ * RAW Dirac demuxer
+ * Copyright (c) 2007 Marco Gerards <marco@gnu.org>
+ *
+ * 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 dirac_probe(AVProbeData *p)
+{
+    unsigned size;
+    if (AV_RL32(p->buf) != MKTAG('B', 'B', 'C', 'D'))
+        return 0;
+
+    size = AV_RB32(p->buf+5);
+    if (size < 13)
+        return 0;
+    if (size + 13LL > p->buf_size)
+        return AVPROBE_SCORE_MAX / 4;
+    if (AV_RL32(p->buf + size) != MKTAG('B', 'B', 'C', 'D'))
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER(dirac, "raw Dirac", dirac_probe, NULL, AV_CODEC_ID_DIRAC)