early-access version 1432

externals/ffmpeg/libavformat/dnxhddec.c

@@ -0,0 +1,46 @@
+/*
+ * RAW DNxHD (SMPTE VC-3) demuxer
+ * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@gmail.com>
+ * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * 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"
+#include "libavcodec/dnxhddata.h"
+
+static int dnxhd_probe(const AVProbeData *p)
+{
+    int w, h, compression_id;
+    if (p->buf_size < 0x2c)
+        return 0;
+    if (ff_dnxhd_parse_header_prefix(p->buf) == 0)
+        return 0;
+    h = AV_RB16(p->buf + 0x18);
+    w = AV_RB16(p->buf + 0x1a);
+    if (!w || !h)
+        return 0;
+    compression_id = AV_RB32(p->buf + 0x28);
+    if ((compression_id < 1235 || compression_id > 1260) &&
+        (compression_id < 1270 || compression_id > 1274))
+        return 0;
+    return AVPROBE_SCORE_MAX;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER(dnxhd, "raw DNxHD (SMPTE VC-3)", dnxhd_probe, NULL, AV_CODEC_ID_DNXHD)