add python bindings

CMakeLists.txt

@@ -35,6 +35,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 option(USE_SANITIZER "Sanitizers for debugging" ON)
 option(DISABLE_WARNINGS "Disbale compilation warnings" OFF)
+option(USE_PYTHON "Build python bindings" ON)
 
 
 set(OPTIONAL_FLAGS "")
@@ -46,49 +47,33 @@ if(USE_SANITIZER)
     set(OPTIONAL_FLAGS "${OPTIONAL_FLAGS} -fdiagnostics-parseable-fixits -fdiagnostics-generate-patch -fdiagnostics-show-template-tree -fsanitize=address,undefined,pointer-compare -fno-sanitize-recover -D_FORTIFY_SOURCE=2 -fstack-protector -fno-omit-frame-pointer ")
 endif()
 
-# if(TUNE_LOCAL)
-#     if(UNIX AND NOT APPLE)
-#         message(STATUS "unix")
-#         set(ARCH_FLAGS )
-#         target_compile_options(project_options INTERFACE -mtune=native -march=native )
-#     elseif(APPLE)
-#         message(STATUS "compiling for apple")
-#         target_compile_options(project_options INTERFACE -mtune=apple-m1 -mcpu=apple-m1 )
-#     endif()
-#     # 
-# endif()
 
 
-
-include(CheckIPOSupported)
-check_ipo_supported(RESULT LTO_AVAILABLE)
-if((CMAKE_BUILD_TYPE STREQUAL "Release") AND  LTO_AVAILABLE)
-    message(STATUS "Building with link time optimization")
-else()
-    message(STATUS "Building without link time optimization")
-endif()
-
 set(SUPPRESSED_WARNINGS "-Wno-return-type")
 
-set(CMAKE_CXX_FLAGS  "${OPTIONAL_FLAGS} ${OPTIMIZATION_FLAGS} ${SUPPRESSED_WARNINGS}")
+set(CMAKE_CXX_FLAGS  "${OPTIMIZATION_FLAGS} ${SUPPRESSED_WARNINGS}")
+
+if(USE_PYTHON)
+set(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -fPIC")
+endif(USE_PYTHON)
+
+
+
 
 include_directories(include)
 add_subdirectory(src)
 
 
-
-
-
 add_library(aare INTERFACE) 
-
-# target_link_libraries( aare  
-# PRIVATE
-#  nlohmann_json::nlohmann_json
-# PUBLIC
-#  fmt::fmt
-# )
-
 target_link_libraries(aare INTERFACE common core file_io)
 
 
 add_subdirectory(examples)
+target_link_libraries(example PUBLIC aare)
+
+if(USE_PYTHON)
+    find_package (Python 3.11 COMPONENTS Interpreter Development)
+    find_package(pybind11 2.11 REQUIRED)
+    add_subdirectory(python)
+    target_link_libraries(_aare PRIVATE aare nlohmann_json::nlohmann_json fmt::fmt)
+endif()

examples/CMakeLists.txt

@@ -2,6 +2,5 @@ add_executable(example "${CMAKE_CURRENT_SOURCE_DIR}/main.cpp")
 
 target_include_directories(example PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
 
-target_link_libraries(example PUBLIC aare)
 
 

python/CMakeLists.txt

@@ -0,0 +1 @@
+pybind11_add_module(_aare src/bindings.cpp)

python/aare/File.py

@@ -0,0 +1,57 @@
+import json
+from typing import Any
+import _aare
+import os
+
+
+class File:
+    """
+    File class. uses proxy pattern to wrap around the pybinding class
+    abstracts the python binding class that is requires type and detector information
+    (e.g. _FileHandler_Jungfrau_16)
+    """
+    def __init__(self, path):
+        """
+        opens the master file and checks the dynamic range and detector
+        
+        """
+        self.path = path
+        # check if file exists
+        if not os.path.exists(path):
+            raise FileNotFoundError(f"File not found: {path}")
+        ext = os.path.splitext(path)[1]
+
+        if ext not in (".raw", ".json"):
+            raise ValueError(f"Invalid file extension: {ext}")
+        
+        if ext == ".json":
+            # read the master file and get the detector and bitdepth
+            master_data = json.load(open(path))
+            detector = master_data["Detector Type"]
+            bitdepth = None
+            if 'Dynamic Range' not in master_data and detector == "Jungfrau":
+                bitdepth = 16
+            else:
+                bitdepth = master_data["Dynamic Range"]
+        else:
+            NotImplementedError("Raw file not implemented yet")
+
+        # class_name is of the form _FileHandler_Jungfrau_16...
+        class_name = f"_FileHandler_{detector}_{bitdepth}"
+
+        # this line is the equivalent of:
+        # self._file = _FileHandler_Jungfrau_16(path)
+        self._file = getattr(_aare, class_name)(path)
+    
+
+    def __getattribute__(self, __name: str) -> Any:
+        """
+        Proxy pattern to call the methods of the _file
+        """
+        return getattr(object.__getattribute__(self, "_file"), __name)
+
+
+
+
+
+        

python/aare/Frame.py

@@ -0,0 +1,16 @@
+from typing import Any
+
+
+class Frame:
+    """
+    Frame class. uses proxy pattern to wrap around the pybinding class
+    the intention behind it is to only use one class for frames in python (not Frame_8, Frame_16, etc) 
+    """
+    def __init__(self, frameImpl):
+        self._frameImpl = frameImpl
+    def __getattribute__(self, __name: str) -> Any:
+        """
+        Proxy pattern to call the methods of the frameImpl
+        """
+        return getattr(object.__getattribute__(self, "_frameImpl"), __name)
+    

python/aare/__init__.py

@@ -0,0 +1,3 @@
+from _aare import *
+from .Frame import Frame
+from .File import File

python/example/read_frame.py

@@ -0,0 +1,7 @@
+from aare import File, Frame
+
+if __name__ == "__main__":
+    file = File("/home/bb/github/aare/data/jungfrau_single_master_0.json")
+    frame = file.get_frame(0)
+    print(frame.rows, frame.cols)
+    print(frame.get(0,0))

python/src/bindings.cpp

@@ -0,0 +1,41 @@
+#include <cstdint>
+#include <filesystem>
+#include <pybind11/pybind11.h>
+#include <string>
+
+#include "common/defs.hpp"
+#include "core/Frame.hpp"
+#include "file_io/FileHandler.hpp"
+
+namespace py = pybind11;
+
+
+PYBIND11_MODULE(_aare, m) {
+    // helps to convert from std::string to std::filesystem::path
+    py::class_<std::filesystem::path>(m, "Path")
+        .def(py::init<std::string>());
+        py::implicitly_convertible<std::string, std::filesystem::path>();
+
+    //TODO: find a solution to avoid code duplication and include other detectors
+    py::class_<FileHandler<DetectorType::Jungfrau, uint16_t>>(m, "_FileHandler_Jungfrau_16")
+        .def(py::init<std::filesystem::path>())
+        .def("get_frame", &FileHandler<DetectorType::Jungfrau, uint16_t>::get_frame);
+
+    
+    py::enum_<DetectorType>(m, "DetectorType");
+
+    py::class_<Frame<uint16_t>>(m, "_Frame16")
+        .def(py::init<std::byte*, ssize_t, ssize_t>())
+        .def("get", &Frame<uint16_t>::get)
+        .def_readonly("rows", &Frame<uint16_t>::rows)
+        .def_readonly("cols", &Frame<uint16_t>::cols)
+        .def_readonly("bitdepth", &Frame<uint16_t>::bitdepth);
+
+
+
+    
+
+    
+}
+
+

src/file_io/file/JsonFile.cpp

@@ -1,27 +1,19 @@
 #include "file_io/JsonFile.hpp"
 #include <typeinfo>
 
-template <DetectorType detector,typename DataType>
-Frame<DataType>* JsonFile<detector,DataType>::get_frame(int frame_number){
-    int subfile_id=frame_number/this->max_frames_per_file;
-    std::byte* buffer;
+template <DetectorType detector, typename DataType>
+Frame<DataType> *JsonFile<detector, DataType>::get_frame(int frame_number) {
+    int subfile_id = frame_number / this->max_frames_per_file;
+    std::byte *buffer;
     size_t frame_size = this->subfiles[subfile_id]->bytes_per_frame();
     buffer = new std::byte[frame_size];
 
-    this->subfiles[subfile_id]->get_frame(buffer, frame_number%this->max_frames_per_file);
-
-
+    this->subfiles[subfile_id]->get_frame(buffer, frame_number % this->max_frames_per_file);
 
     auto f = new Frame<DataType>(buffer, this->rows, this->cols);
 
     delete[] buffer;
     return f;
-
-    
-
-
-
 }
 
 template class JsonFile<DetectorType::Jungfrau, uint16_t>;
-