Pass size as tuple to C, as per python-pillow#8733

Author: radarhere

src/PIL/AvifImagePlugin.py

@@ -212,8 +212,7 @@ def _save(
 
     # Setup the AVIF encoder
     enc = _avif.AvifEncoder(
-        im.size[0],
-        im.size[1],
+        im.size,
         subsampling,
         quality,
         speed,
@@ -260,8 +259,7 @@ def _save(
                 enc.add(
                     frame.tobytes("raw", rawmode),
                     frame_dur,
-                    frame.size[0],
-                    frame.size[1],
+                    frame.size,
                     rawmode,
                     is_single_frame,
                 )

src/_avif.c

@@ -252,7 +252,7 @@ AvifEncoderNew(PyObject *self_, PyObject *args) {
 
     if (!PyArg_ParseTuple(
             args,
-            "IIsiiissiiOOy*y*iy*O",
+            "(II)siiissiiOOy*y*iy*O",
             &width,
             &height,
             &subsampling,
@@ -479,7 +479,7 @@ _encoder_add(AvifEncoderObject *self, PyObject *args) {
 
     if (!PyArg_ParseTuple(
             args,
-            "z#IIIsO",
+            "z#I(II)sO",
             (char **)&rgb_bytes,
             &size,
             &duration,