file reorganization with top-level module

2018-07-11 17:38:47 +02:00
parent 30a7952cbb
commit 097ac144d9
317 changed files with 438 additions and 470 deletions
--- a/electrum/qrscanner.py
+++ b/electrum/qrscanner.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+#
+# Electrum - lightweight Bitcoin client
+# Copyright (C) 2015 Thomas Voegtlin
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation files
+# (the "Software"), to deal in the Software without restriction,
+# including without limitation the rights to use, copy, modify, merge,
+# publish, distribute, sublicense, and/or sell copies of the Software,
+# and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import os
+import sys
+import ctypes
+
+if sys.platform == 'darwin':
+    name = 'libzbar.dylib'
+elif sys.platform in ('windows', 'win32'):
+    name = 'libzbar-0.dll'
+else:
+    name = 'libzbar.so.0'
+
+try:
+    libzbar = ctypes.cdll.LoadLibrary(name)
+except BaseException:
+    libzbar = None
+
+
+def scan_barcode(device='', timeout=-1, display=True, threaded=False, try_again=True):
+    if libzbar is None:
+        raise RuntimeError("Cannot start QR scanner; zbar not available.")
+    libzbar.zbar_symbol_get_data.restype = ctypes.c_char_p
+    libzbar.zbar_processor_create.restype = ctypes.POINTER(ctypes.c_int)
+    libzbar.zbar_processor_get_results.restype = ctypes.POINTER(ctypes.c_int)
+    libzbar.zbar_symbol_set_first_symbol.restype = ctypes.POINTER(ctypes.c_int)
+    proc = libzbar.zbar_processor_create(threaded)
+    libzbar.zbar_processor_request_size(proc, 640, 480)
+    if libzbar.zbar_processor_init(proc, device.encode('utf-8'), display) != 0:
+        if try_again:
+            # workaround for a bug in "ZBar for Windows"
+            # libzbar.zbar_processor_init always seem to fail the first time around
+            return scan_barcode(device, timeout, display, threaded, try_again=False)
+        raise RuntimeError("Can not start QR scanner; initialization failed.")
+    libzbar.zbar_processor_set_visible(proc)
+    if libzbar.zbar_process_one(proc, timeout):
+        symbols = libzbar.zbar_processor_get_results(proc)
+    else:
+        symbols = None
+    libzbar.zbar_processor_destroy(proc)
+    if symbols is None:
+        return
+    if not libzbar.zbar_symbol_set_get_size(symbols):
+        return
+    symbol = libzbar.zbar_symbol_set_first_symbol(symbols)
+    data = libzbar.zbar_symbol_get_data(symbol)
+    return data.decode('utf8')
+
+def _find_system_cameras():
+    device_root = "/sys/class/video4linux"
+    devices = {} # Name -> device
+    if os.path.exists(device_root):
+        for device in os.listdir(device_root):
+            try:
+                with open(os.path.join(device_root, device, 'name')) as f:
+                    name = f.read()
+            except IOError:
+                continue
+            name = name.strip('\n')
+            devices[name] = os.path.join("/dev", device)
+    return devices
+
+
+if __name__ == "__main__":
+    print(scan_barcode())