[FFmpeg-devel] [PATCH v2 1/5] avutil/spherical: Add more spherical types

[Derek Buitenhuis <derek.buitenhuis@gmail.com>]

These originate from the Apple Vision Pro, and are documented here:

    https://developer.apple.com/documentation/coremedia/cmprojectiontype

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
---
 libavutil/spherical.c |  5 +++++
 libavutil/spherical.h | 16 ++++++++++++++++
 libavutil/version.h   |  2 +-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/libavutil/spherical.c b/libavutil/spherical.c
index 800d3459a5..64ade1d0ec 100644
--- a/libavutil/spherical.c
+++ b/libavutil/spherical.c
@@ -29,6 +29,8 @@ AVSphericalMapping *av_spherical_alloc(size_t *size)
     if (!spherical)
         return NULL;
 
+    spherical->projection = AV_SPHERICAL_RECTILINEAR;
+
     if (size)
         *size = sizeof(*spherical);
 
@@ -57,6 +59,9 @@ static const char *const spherical_projection_names[] = {
     [AV_SPHERICAL_EQUIRECTANGULAR]      = "equirectangular",
     [AV_SPHERICAL_CUBEMAP]              = "cubemap",
     [AV_SPHERICAL_EQUIRECTANGULAR_TILE] = "tiled equirectangular",
+    [AV_SPHERICAL_HALF_EQUIRECTANGULAR] = "half equirectangular",
+    [AV_SPHERICAL_RECTILINEAR]          = "rectilinear",
+    [AV_SPHERICAL_FISHEYE]              = "fisheye",
 };
 
 const char *av_spherical_projection_name(enum AVSphericalProjection projection)
diff --git a/libavutil/spherical.h b/libavutil/spherical.h
index 828ac836da..2e90f7752d 100644
--- a/libavutil/spherical.h
+++ b/libavutil/spherical.h
@@ -66,6 +66,22 @@ enum AVSphericalProjection {
      * the position of the current video in a larger surface.
      */
     AV_SPHERICAL_EQUIRECTANGULAR_TILE,
+
+    /**
+     * Video frame displays as a 180 degree equirectangular projection.
+     */
+    AV_SPHERICAL_HALF_EQUIRECTANGULAR,
+
+    /**
+     * Video frame displays on a flat, rectangular 2D surface.
+     */
+    AV_SPHERICAL_RECTILINEAR,
+
+    /**
+     * Fisheye projection (Apple).
+     * See: https://developer.apple.com/documentation/coremedia/cmprojectiontype/fisheye
+     */
+    AV_SPHERICAL_FISHEYE,
 };
 
 /**
diff --git a/libavutil/version.h b/libavutil/version.h
index 2756f2aa03..7df546ee22 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  59
-#define LIBAVUTIL_VERSION_MINOR  22
+#define LIBAVUTIL_VERSION_MINOR  23
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
-- 
2.43.0

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