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Small improvements #3

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Small improvements #3

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9082f09
Modified "getNextNumPyFrame(...)" method
Mar 25, 2026
735f5da
Modified __init__ of PxLApi Class
Mar 25, 2026
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14 changes: 10 additions & 4 deletions pixelinkWrapper/pixelink.py
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Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,6 @@ def _isApiSupported(minApiNumbers, curApiNumbers):

else: # on Linux
## Loads Pixelink API library
_Api = CDLL('libPxLApi.so')

## Verifies that the loaded Pixelink API version is supported
_minApiVersion = "4.2.2.11" # minimum Pixelink API version supported
Expand All @@ -103,8 +102,15 @@ def _isApiSupported(minApiNumbers, curApiNumbers):
_completedProcess = subprocess.run(_pxlApiSearch, shell=True, text=True, capture_output=True, check=True)
_pxlApiPath = _completedProcess.stdout
# Finds current version of Pixelink API
try:
# first try using the SimLink to the SO:
_Api = CDLL('libPxLApi.so')
except OSError:
# if this fails, use the results of the
# find command inside $PIXELINK_SDK_LIB
_Api = CDLL(_pxlApiList.split("\n")[-1])
_pxlApiList = _pxlApiPath.split("/")
_curApiVersion = _pxlApiList[len(_pxlApiList)-1].replace("libPxLApi.so.", "").replace("libPxLApiLite.so.", "").strip()
_curApiVersion = _pxlApiList[-1].replace("libPxLApi.so.", "").replace("libPxLApiLite.so.", "").strip()
# Checks if the loaded Pixelink API is supported
if _isApiSupported(_minApiVersion.split("."), _curApiVersion.split(".")):
print("\nWARNING: Pixelink API Version {0} detected. This Python wrapper was designed to\n"
Expand Down Expand Up @@ -1376,14 +1382,14 @@ def getNextNumPyFrame(hCamera, frame=None):
"""
ctFrameDesc = PxLApi._FrameDesc()
ctFrameDesc.uSize = sizeof(ctFrameDesc) # The API needs to know the version of descriptor
if (frame is None or (0 == frame.size)):
if (frame is None or (0 == frame.nbytes)):
# Special case where the user doesn't want a frame with this call -- rather just (sw) triggers a frame for a callback
ctBufferSize = -1
rc = PxLApi._Api.PxLGetNextFrame(hCamera, ctBufferSize, 0, byref(ctFrameDesc))
if(not(PxLApi.apiSuccess(rc))):
return (rc,)
else:
ctBufferSize = frame.size
ctBufferSize = frame.nbytes
rc = PxLApi._Api.PxLGetNextFrame(hCamera, ctBufferSize, frame.ctypes.data_as(c_void_p), byref(ctFrameDesc))
if(not(PxLApi.apiSuccess(rc))):
return (rc,)
Expand Down