lavu: Add AVSphericalMapping type and frame side data

While no decoder currently exports spherical information, this type
represents a frame property that has to be passed through from container
to frames.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/libavutil/spherical.c b/libavutil/spherical.c
new file mode 100644
index 0000000000..816452cbd6
--- /dev/null
+++ b/libavutil/spherical.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2016 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * 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 "mem.h"
+#include "spherical.h"
+
+AVSphericalMapping *av_spherical_alloc(size_t *size)
+{
+    AVSphericalMapping *spherical = av_mallocz(sizeof(AVSphericalMapping));
+    if (!spherical)
+        return NULL;
+
+    if (size)
+        *size = sizeof(*spherical);
+
+    return spherical;
+}