cyndilib ptz class patch

ptzclass.patch

diff --git a/src/cyndilib/receiver.pxd b/src/cyndilib/receiver.pxd
index 2d03940..a3650d8 100644
--- a/src/cyndilib/receiver.pxd
+++ b/src/cyndilib/receiver.pxd
@@ -48,6 +48,7 @@ cdef class Receiver:
     cdef readonly VideoRecvFrame video_frame
     cdef readonly AudioRecvFrame audio_frame
     cdef readonly MetadataRecvFrame metadata_frame
+    cdef readonly PTZ ptz
     cdef readonly str source_name
     cdef readonly bint has_video_frame, has_audio_frame, has_metadata_frame
     cdef readonly RLock connection_lock
@@ -84,8 +85,6 @@ cdef class Receiver:
     cdef int _send_source_tally(self) except -1 nogil
     cpdef is_ptz_supported(self)
     cdef bint _is_ptz_supported(self)
-    cpdef set_zoom_level(self, float zoom_level)
-    cdef bint _set_zoom_level(self, float zoom_level)
     cpdef zoom(self, float zoom_speed)
     cdef bint _set_zoom_speed(self, float zoom_speed)
     cpdef pan_and_tilt(self, float pan_speed, float tilt_speed)
@@ -139,3 +138,9 @@ cdef class Receiver:
     cdef void free_video(self, NDIlib_video_frame_v2_t* p) noexcept nogil
     cdef void free_audio(self, NDIlib_audio_frame_v3_t* p) noexcept nogil
     cdef void free_metadata(self, NDIlib_metadata_frame_t* p) noexcept nogil
+
+
+cdef class PTZ:
+    cdef Receiver receiver
+
+    cdef NDIlib_recv_instance_t _get_ptr(self)
diff --git a/src/cyndilib/receiver.pyi b/src/cyndilib/receiver.pyi
index e1a76aa..ef4794c 100644
--- a/src/cyndilib/receiver.pyi
+++ b/src/cyndilib/receiver.pyi
@@ -39,6 +39,7 @@ class Receiver:
     connection_lock: RLock
     connection_notify: Condition
     frame_sync: FrameSync
+    ptz: PTZ
     has_audio_frame: bool
     has_metadata_frame: bool
     has_video_frame: bool
@@ -97,6 +98,9 @@ class Receiver:
     def set_exposure_fine(self, iris: float, gain: float, shutter_speed: float) -> Any: ...
     def __reduce__(self): ...
 
+class PTZ:
+    def set_zoom_level(self, zoom_value: float) -> bool: ...
+
 class RecvCreate:
     # __pyx_vtable__: ClassVar[PyCapsule] = ...
     allow_video_fields: bool
diff --git a/src/cyndilib/receiver.pyx b/src/cyndilib/receiver.pyx
index cc22bf1..b779145 100644
--- a/src/cyndilib/receiver.pyx
+++ b/src/cyndilib/receiver.pyx
@@ -103,6 +103,7 @@ cdef class Receiver:
         audio_frame (AudioRecvFrame):
         metadata_frame (MetadataRecvFrame):
         frame_sync (FrameSync):
+        ptz (PTZ):
 
     """
     def __cinit__(self, *args, **kwargs):
@@ -168,9 +169,11 @@ cdef class Receiver:
         if self.ptr is NULL:
             raise MemoryError()
         self.frame_sync = FrameSync(self)
+        self.ptz = PTZ(self)
 
     def __dealloc__(self):
         self.frame_sync = None
+        self.ptz = None
         cdef NDIlib_recv_instance_t p = self.ptr
         if self.ptr is not NULL:
             self.ptr = NULL
@@ -403,23 +406,6 @@ cdef class Receiver:
     cdef bint _is_ptz_supported(self):
         return NDIlib_recv_ptz_is_supported(self.ptr)
 
-    cpdef set_zoom_level(self, float zoom_level):
-        """Set the PTZ zoom level
-        
-        Arguments:
-            zoom_level (float): `0.0` (max zoomed out) … `1.0` (max zoomed in)
-        
-        .. versionadded:: 0.0.7
-        """
-        return self._set_zoom_level(zoom_level)
-
-    cdef bint _set_zoom_level(self, float zoom_level):
-        if zoom_level < 0.0:
-            zoom_level = 0.0
-        elif zoom_level > 1.0:
-            zoom_level = 1.0
-        return NDIlib_recv_ptz_zoom(self.ptr, zoom_level)
-
     cpdef zoom(self, float zoom_speed):
         """Zoom the camera with the given speed.
         
@@ -908,6 +894,35 @@ cdef class Receiver:
     cdef void free_metadata(self, NDIlib_metadata_frame_t* p) noexcept nogil:
         NDIlib_recv_free_metadata(self.ptr, p)
 
+
+cdef class PTZ:
+    """PTZ control for a :class:`Receiver`
+    """
+    def __init__(self, Receiver receiver):
+        self.receiver = receiver
+
+    def __dealloc__(self):
+        self.receiver = None
+
+    cdef NDIlib_recv_instance_t _get_ptr(self):
+        cdef NDIlib_recv_instance_t ptr = self.receiver.ptr
+        if ptr is NULL:
+            raise ValueError("Receiver is not connected")
+        return ptr
+
+    def set_zoom_level(self, float zoom_level):
+        """Set the PTZ zoom level
+
+        Arguments:
+            zoom_level (float): `0.0` (max zoomed out) … `1.0` (max zoomed in)
+
+        .. versionadded:: 0.0.7
+        """
+        if not 0 <= zoom_level <= 1:
+            raise ValueError("zoom_level must be between 0.0 and 1.0")
+        return NDIlib_recv_ptz_zoom(self._get_ptr(), zoom_level)
+
+
 cdef class RecvThreadWorker:
     cdef Receiver receiver
     cdef uint32_t timeout_ms