avutil/spherical: add av_spherical_projection_name()

Reviewed-by: Benoit Fouet <benoit.fouet@free.fr>
Reviewed-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/libavutil/spherical.c b/libavutil/spherical.c
index f0b622128a..4be55f36cf 100644
--- a/libavutil/spherical.c
+++ b/libavutil/spherical.c
@@ -50,3 +50,30 @@ void av_spherical_tile_bounds(const AVSphericalMapping *map,
     *right  = orig_width  - width  - *left;
     *bottom = orig_height - height - *top;
 }
+
+static const char *spherical_projection_names[] = {
+    [AV_SPHERICAL_EQUIRECTANGULAR]      = "equirectangular",
+    [AV_SPHERICAL_CUBEMAP]              = "cubemap",
+    [AV_SPHERICAL_EQUIRECTANGULAR_TILE] = "tiled equirectangular",
+};
+
+const char *av_spherical_projection_name(enum AVSphericalProjection projection)
+{
+    if ((unsigned)projection >= FF_ARRAY_ELEMS(spherical_projection_names))
+        return "unknown";
+
+    return spherical_projection_names[projection];
+}
+
+int av_spherical_from_name(const char *name)
+{
+    int i;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(spherical_projection_names); i++) {
+        size_t len = strlen(spherical_projection_names[i]);
+        if (!strncmp(spherical_projection_names[i], name, len))
+            return i;
+    }
+
+    return -1;
+}