Добавлен объект для получения EDID информации

pym/calculate/lib/utils/device.py

@@ -685,6 +685,7 @@ class Sysfs(DeviceFs):
         Input = "class/input"
         Block = "block"
         Dmi = "class/dmi/id"
+        Drm = "class/drm"
         Module = "module"
         BlockScheduler = "queue/scheduler"
 

pym/calculate/lib/utils/video.py

@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2020 Mir Calculate. http://www.calculate-linux.org
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+
+import sys
+import re
+from calculate.lib.cl_lang import setLocalTranslate
+import calculate.lib.utils.device as device
+from calculate.lib.utils.files import process, getProgPath
+
+_ = lambda x: x
+setLocalTranslate('cl_lib3', sys.modules[__name__])
+
+def get_edid_data():
+    for fn in device.sysfs.glob(device.sysfs.Path.Drm,"*/edid"):
+        ediddata = device.sysfs.read(fn)
+        if ediddata:
+            return ediddata
+    return None
+
+class EdidInfoError(Exception):
+    pass
+
+class EdidInfo(object):
+    reBaseEDID = re.compile("\nBlock \d, Base EDID:.*?\nChecksum:",
+        re.S)
+    reDTD = re.compile(r"DTD\s+\d+:\s*(\d+x\d+)\s+(?:[0-9.]+\s+Hz)"
+        "\s+(\d+:\d+)\s+[^(]+\((\d+) mm x (\d+) mm\)")
+
+    def __init__(self):
+        self.edid_decode = getProgPath('/usr/bin/edid-decode')
+        if not self.edid_decode:
+            raise EdidInfoError(_("{} not found"))
+        self.resolution = None
+        self.ratio = None
+        self.screensize = None
+
+    def set_data(self, data):
+        p = process(self.edid_decode, "-")
+        p.write(data)
+        if p.failed():
+            raise EdidInfoError(
+                _("Failed to parse EDID information: {}").format(p.readerr()))
+        self.parse(p.read())
+
+    def parse(self, edid_decode_data):
+        m = self.reBaseEDID.search(edid_decode_data)
+        if not m:
+            raise EdidInfoError(_("Failed to get Base EDID block"))
+        base_edid = m.group()
+        m = self.reDTD.search(base_edid)
+        if not m:
+            raise EdidInfoError(_("Failed to get DTD record"))
+        self.resolution, self.ratio, sizex, sizey = m.groups()
+        self.screensize = "{}x{}".format(sizex, sizey)