From 96123552f8c037d683aa669c7c47ad2ebc9b1955 Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Fri, 12 Nov 2021 20:16:59 +0100
Subject: Create (a new) OOT

---
 src/gr-fadingui/python/datasource.py | 68 ++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/gr-fadingui/python/datasource.py

(limited to 'src/gr-fadingui/python/datasource.py')

diff --git a/src/gr-fadingui/python/datasource.py b/src/gr-fadingui/python/datasource.py
new file mode 100644
index 0000000..ddce468
--- /dev/null
+++ b/src/gr-fadingui/python/datasource.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright 2021 Naoki Pross, Sara Halter.
+#
+# This is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This software is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this software; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+import numpy as np
+from gnuradio import gr
+
+class datasource(gr.sync_block):
+    """
+    Loads data from a file choosen in the graphical user interface.
+    """
+    def __init__(self, vec_len, sock_addr, file_list):
+        gr.sync_block.__init__(self,
+            name="datasource",
+            in_sig=None,
+            out_sig=[np.dtype('256b')])
+
+        # parameters
+        self.vec_len = vec_len
+        self.sock_addr = sock_addr
+        self.file_list = file_list
+
+        # file members
+        self.fdata = None
+        self.fsize = None
+        self.fpos = 0
+
+        # TODO: make it possible to choose from UI
+        self.load_file(file_list[0])
+
+    def load_file(self, fname):
+        self.fdata = np.fromfile(fname, np.byte)
+        self.fsize = len(self.data)
+
+        # TODO: remove
+        print(f"datasource: loaded file size={self.fsize}, head:")
+        print(self.fdata[:10])
+
+    def work(self, input_items, output_items):
+        out = output_items[0]
+
+        if self.fpos + self.vec_len > self.fsize:
+            # TODO: implement padding with zeroes
+            self.fpos = 0
+            return 0
+
+        out[:] = self.fdata[self.fpos:self.fpos + self.vec_len]
+        self.fpos += self.vec_len
+
+        return len(output_items[0])
+
-- 
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