cleanup

gui.py

@@ -1,83 +1,67 @@
-import asyncio
 import os
-import logging
+import sys
+import subprocess
+import time
 
 import numpy as np
-from quamash import QEventLoop, QtWidgets
-import pyqtgraph as pg
-from sipyco.pipe_ipc import AsyncioChildComm
 from sipyco import pyon
 
 
-class SpectrogramWidget(pg.PlotWidget):
+# env QT_QPA_PLATFORM=wayland python gui.py 
-    def __init__(self, block_size=4096):
-        super(SpectrogramWidget, self).__init__()
 
-        self.block_size = block_size
+class ParentComm:
+    def __init__(self):
+        self.c_rfd, self.p_wfd = os.pipe()
+        self.p_rfd, self.c_wfd = os.pipe()
+        self.rf = open(int(self.p_rfd), "rb", 0)
+        self.wf = open(int(self.p_wfd), "wb", 0)
+        self.process = None
 
-        self.img = pg.ImageItem()
+    def get_address(self):
-        self.addItem(self.img)
+        return "{},{}".format(self.c_rfd, self.c_wfd)
 
-        self.img_array = np.zeros((100, block_size))
+    def read(self, n):
+        return self.rf.read(n)
 
-        pos = np.array([0., 1., 0.5, 0.25, 0.75])
+    def readline(self):
-        color = np.array([[0,255,255,255], [255,255,0,255], [0,0,0,255], (0, 0, 255, 255), (255, 0, 0, 255)], dtype=np.ubyte)
+        return self.rf.readline()
-        cmap = pg.ColorMap(pos, color)
-        lut = cmap.getLookupTable(0.0, 1.0, 256)
 
-        self.img.setLookupTable(lut)
+    def write(self, data):
-        self.img.setLevels([-50,40])
+        return self.wf.write(data)
 
-        self.show()
+    def write_pyon(self, obj):
+        self.write(pyon.encode(obj).encode() + b"\n")
 
-    def update(self, block):
+    def close(self):
-        self.img_array = np.roll(self.img_array, -1, 0)
+        self.rf.close()
-        self.img_array[-1:] = block 
+        self.wf.close()
-        self.img.setImage(self.img_array, autoLevels=True)
+        if self.process is not None:
+            self.process.wait()
 
+    def create_subprocess(self, *args):
+        env = os.environ.copy()
+        env["PYTHONUNBUFFERED"] = "1"
+        env["NOPTICA2_IPC"] = self.get_address()
+        self.process = subprocess.Popen(
+            *args, pass_fds={self.c_rfd, self.c_wfd},
+            env=env)
+        os.close(self.c_rfd)
+        os.close(self.c_wfd)
 
-class IPCClient(AsyncioChildComm):
-    def set_close_cb(self, close_cb):
-        self.close_cb = close_cb
-
-    async def read_pyon(self):
-        line = await self.readline()
-        return pyon.decode(line.decode())
-
-    async def listen(self, spectrogram):
-        while True:
-            obj = await self.read_pyon()
-            try:
-                action = obj["action"]
-                if action == "update":
-                    spectrogram.update(obj["data"])
-                if action == "terminate":
-                    self.close_cb()
-                    return
-            except:
-                logging.error("error processing parent message",
-                              exc_info=True)
-                self.close_cb()
 
 
 def main():
-    app = QtWidgets.QApplication([])
+    gui = ParentComm()
-    loop = QEventLoop(app)
-    asyncio.set_event_loop(loop)
-
     try:
-        ipc = IPCClient(os.getenv("NOPTICA2_IPC"))
+        gui.create_subprocess([sys.executable, os.path.join(os.path.dirname(os.path.abspath(__file__)), "gui_impl.py")])
-        loop.run_until_complete(ipc.connect())
+        for i in range(600):
-        try:
+            obj = {"action": "update", "data": np.random.normal(size=4096)}
-            main_widget = SpectrogramWidget()
+            gui.write_pyon(obj)
-            main_widget.show()
+            time.sleep(1/60)
-            ipc.set_close_cb(main_widget.close)
+        obj = {"action": "terminate"}
-            asyncio.ensure_future(ipc.listen(main_widget))
+        gui.write_pyon(obj)
-            loop.run_forever()
-        finally:
-            ipc.close()
     finally:
-        loop.close()
+        gui.close()
 
 
 if __name__ == "__main__":

gui_impl.py

@@ -0,0 +1,84 @@
+import asyncio
+import os
+import logging
+
+import numpy as np
+from quamash import QEventLoop, QtWidgets
+import pyqtgraph as pg
+from sipyco.pipe_ipc import AsyncioChildComm
+from sipyco import pyon
+ 
+
+class SpectrogramWidget(pg.PlotWidget):
+    def __init__(self, block_size=4096):
+        super(SpectrogramWidget, self).__init__()
+ 
+        self.block_size = block_size
+ 
+        self.img = pg.ImageItem()
+        self.addItem(self.img)
+ 
+        self.img_array = np.zeros((100, block_size))
+ 
+        pos = np.array([0., 1., 0.5, 0.25, 0.75])
+        color = np.array([[0,255,255,255], [255,255,0,255], [0,0,0,255], (0, 0, 255, 255), (255, 0, 0, 255)], dtype=np.ubyte)
+        cmap = pg.ColorMap(pos, color)
+        lut = cmap.getLookupTable(0.0, 1.0, 256)
+ 
+        self.img.setLookupTable(lut)
+        self.img.setLevels([-50,40])
+  
+        self.show()
+
+    def update(self, block):
+        self.img_array = np.roll(self.img_array, -1, 0)
+        self.img_array[-1:] = block 
+        self.img.setImage(self.img_array, autoLevels=True)
+
+
+class IPCClient(AsyncioChildComm):
+    def set_close_cb(self, close_cb):
+        self.close_cb = close_cb
+
+    async def read_pyon(self):
+        line = await self.readline()
+        return pyon.decode(line.decode())
+
+    async def listen(self, spectrogram):
+        while True:
+            obj = await self.read_pyon()
+            try:
+                action = obj["action"]
+                if action == "update":
+                    spectrogram.update(obj["data"])
+                if action == "terminate":
+                    self.close_cb()
+                    return
+            except:
+                logging.error("error processing parent message",
+                              exc_info=True)
+                self.close_cb()
+
+
+def main():
+    app = QtWidgets.QApplication([])
+    loop = QEventLoop(app)
+    asyncio.set_event_loop(loop)
+
+    try:
+        ipc = IPCClient(os.getenv("NOPTICA2_IPC"))
+        loop.run_until_complete(ipc.connect())
+        try:
+            main_widget = SpectrogramWidget()
+            main_widget.show()
+            ipc.set_close_cb(main_widget.close)
+            asyncio.ensure_future(ipc.listen(main_widget))
+            loop.run_forever()
+        finally:
+            ipc.close()
+    finally:
+        loop.close()
+
+
+if __name__ == "__main__":
+    main()

gui_test.py

@@ -1,68 +0,0 @@
-import os
-import sys
-import subprocess
-import time
-
-import numpy as np
-from sipyco import pyon
-
-
-# env QT_QPA_PLATFORM=wayland python gui_test.py 
-
-class ParentComm:
-    def __init__(self):
-        self.c_rfd, self.p_wfd = os.pipe()
-        self.p_rfd, self.c_wfd = os.pipe()
-        self.rf = open(int(self.p_rfd), "rb", 0)
-        self.wf = open(int(self.p_wfd), "wb", 0)
-        self.process = None
-
-    def get_address(self):
-        return "{},{}".format(self.c_rfd, self.c_wfd)
-
-    def read(self, n):
-        return self.rf.read(n)
-
-    def readline(self):
-        return self.rf.readline()
-
-    def write(self, data):
-        return self.wf.write(data)
-
-    def write_pyon(self, obj):
-        self.write(pyon.encode(obj).encode() + b"\n")
-
-    def close(self):
-        self.rf.close()
-        self.wf.close()
-        if self.process is not None:
-            self.process.wait()
-
-    def create_subprocess(self, *args):
-        env = os.environ.copy()
-        env["PYTHONUNBUFFERED"] = "1"
-        env["NOPTICA2_IPC"] = self.get_address()
-        self.process = subprocess.Popen(
-            *args, pass_fds={self.c_rfd, self.c_wfd},
-            env=env)
-        os.close(self.c_rfd)
-        os.close(self.c_wfd)
-
-
-
-def main():
-    gui = ParentComm()
-    try:
-        gui.create_subprocess([sys.executable, "gui.py"])
-        for i in range(600):
-            obj = {"action": "update", "data": np.random.normal(size=4096)}
-            gui.write_pyon(obj)
-            time.sleep(1/60)
-        obj = {"action": "terminate"}
-        gui.write_pyon(obj)
-    finally:
-        gui.close()
-
-
-if __name__ == "__main__":
-    main()