Fixes for previous work

Signed-off-by: Tomi Valkeinen <[email protected]>

v4l2/helpers.py

@@ -5,7 +5,7 @@
 from enum import Enum
 import v4l2.uapi
 
-__all__ = [ 'BufType', 'MemType' ]
+__all__ = [ 'fourcc_to_str', 'str_to_fourcc', 'BufType', 'MemType' ]
 
 def filepath_for_major_minor(major, minor):
     for fname in glob.glob('/dev/video*'):
@@ -26,6 +26,21 @@ def filepath_for_major_minor(major, minor):
 
     raise Exception(f'No device-node found for ({major},{minor})')
 
+def fourcc_to_str(fourcc: int):
+    return ''.join((
+        chr((fourcc >> 0) & 0xff),
+        chr((fourcc >> 8) & 0xff),
+        chr((fourcc >> 16) & 0xff),
+        chr((fourcc >> 24) & 0xff)
+    ))
+
+def str_to_fourcc(s: str):
+    return \
+        ord(s[0]) << 0 | \
+        ord(s[1]) << 8 | \
+        ord(s[2]) << 16 | \
+        ord(s[3]) << 24
+
 class BufType(Enum):
     VIDEO_CAPTURE = v4l2.uapi.V4L2_BUF_TYPE_VIDEO_CAPTURE
     VIDEO_OUTPUT = v4l2.uapi.V4L2_BUF_TYPE_VIDEO_OUTPUT

v4l2/media.py

@@ -8,7 +8,11 @@
 import v4l2.uapi
 from .helpers import filepath_for_major_minor
 
-__all__ = [ 'MediaDevice' ]
+__all__ = [
+    'MediaObject', 'MediaEntity', 'MediaInterface', 'MediaPad', 'MediaLink',
+    'MediaDevice',
+    'MediaLinkFlag'
+]
 
 class MediaTopology:
     def __init__(self, topology, entities, interfaces, pads, links) -> None:

v4l2/videodev.py

@@ -63,9 +63,9 @@ def get_format(self):
         fmt = v4l2.uapi.v4l2_format()
 
         if self.has_mplane_capture:
-            fmt.type = v4l2.BufType.VIDEO_CAPTURE_MPLANE
+            fmt.type = v4l2.BufType.VIDEO_CAPTURE_MPLANE.value
         elif self.has_capture:
-            fmt.type = v4l2.BufType.VIDEO_CAPTURE
+            fmt.type = v4l2.BufType.VIDEO_CAPTURE.value
         else:
             raise NotImplementedError()