mov: Export bounds and padding from spherical metadata

Update the fate test as needed.

libavformat/mov.c

@@ -4637,6 +4637,8 @@ static int mov_read_sv3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     MOVStreamContext *sc;
     int size;
     int32_t yaw, pitch, roll;
+    size_t l = 0, t = 0, r = 0, b = 0;
+    size_t padding = 0;
     uint32_t tag;
     enum AVSphericalProjection projection;
 
@@ -4698,8 +4700,25 @@ static int mov_read_sv3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     switch (tag) {
     case MKTAG('c','b','m','p'):
         projection = AV_SPHERICAL_CUBEMAP;
+        padding = avio_rb32(pb);
         break;
     case MKTAG('e','q','u','i'):
+        t = avio_rb32(pb);
+        b = avio_rb32(pb);
+        l = avio_rb32(pb);
+        r = avio_rb32(pb);
+
+        if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
+            av_log(c->fc, AV_LOG_ERROR,
+                   "Invalid bounding rectangle coordinates %"SIZE_SPECIFIER","
+                   "%"SIZE_SPECIFIER",%"SIZE_SPECIFIER",%"SIZE_SPECIFIER"\n",
+                   l, t, r, b);
+            return AVERROR_INVALIDDATA;
+        }
+
+        if (l || t || r || b)
+            projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
+        else
             projection = AV_SPHERICAL_EQUIRECTANGULAR;
         break;
     default:
@@ -4717,6 +4736,13 @@ static int mov_read_sv3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     sc->spherical->pitch = pitch;
     sc->spherical->roll  = roll;
 
+    sc->spherical->padding = padding;
+
+    sc->spherical->bound_left   = l;
+    sc->spherical->bound_top    = t;
+    sc->spherical->bound_right  = r;
+    sc->spherical->bound_bottom = b;
+
     return 0;
 }
 

tests/ref/fate/mov-spherical-mono

@@ -8,7 +8,11 @@ inverted=0
 [SIDE_DATA]
 side_data_type=Spherical Mapping
 side_data_size=56
-projection=equirectangular
+projection=tiled equirectangular
+bound_left=148
+bound_top=73
+bound_right=147
+bound_bottom=72
 yaw=45
 pitch=30
 roll=15