mini-gst-inspect.py

import argparse
import ctypes
from pathlib import Path

class GstPluginDesc(ctypes.Structure):
    _fields_ = [
        ("major_version", ctypes.c_int),
        ("minor_version", ctypes.c_int),
        ("name", ctypes.c_char_p),
        ("description", ctypes.c_char_p),
        ("plugin_init", ctypes.c_void_p),  # Assuming it's a function pointer
        ("version", ctypes.c_char_p),
        ("license", ctypes.c_char_p),
        ("source", ctypes.c_char_p),
        ("package", ctypes.c_char_p),
        ("origin", ctypes.c_char_p),
    ]

    def print(self):
        print("Major version:", self.major_version)
        print("Minor version:", self.minor_version)
        print("Name:", self.name.decode('utf-8'))
        print("Description:", self.description.decode('utf-8'))
        print("Version:", self.version.decode('utf-8'))
        print("License:", self.license.decode('utf-8'))
        print("Source:", self.source.decode('utf-8'))
        print("Package:", self.package.decode('utf-8'))
        print("Origin:", self.origin.decode('utf-8'))


parser = argparse.ArgumentParser("mini-gst-inspect")
parser.add_argument('libfile')
args = parser.parse_args()

lib = ctypes.CDLL(args.libfile)

gst_plugin_desc_sym = getattr(lib, "gst_plugin_desc", None)
if gst_plugin_desc_sym:
    plugin_desc = ctypes.cast(gst_plugin_desc_sym, ctypes.POINTER(GstPluginDesc)).contents

else:
    p = Path(args.libfile).stem
    name = p[6:] if p[0:6] == "libgst" else p # TODO mimic extract_symname
    gst_plugin_get_desc_sym = getattr(lib, f"gst_plugin_{name}_get_desc")

    gst_plugin_get_desc_sym.restype = ctypes.POINTER(GstPluginDesc)

    plugin_desc = gst_plugin_get_desc_sym().contents


plugin_desc.print()