introduce new pipe classes to improve sequencing

csdr/csdr.py

@@ -64,6 +64,77 @@ class output(object):
         return True
 
 
+class Pipe(object):
+    READ = "r"
+    WRITE = "w"
+    NONE = None
+
+    @staticmethod
+    def create(path, t, encoding=None):
+        if t == Pipe.READ:
+            return ReadingPipe(path, encoding=encoding)
+        elif t == Pipe.WRITE:
+            return WritingPipe(path, encoding=encoding)
+        elif t == Pipe.NONE:
+            return Pipe(path, None, encoding=encoding)
+
+    def __init__(self, path, direction, encoding=None):
+        self.path = path
+        self.direction = direction
+        self.encoding = encoding
+        self.file = None
+        try:
+            os.unlink(path)
+        except Exception:
+            pass
+        os.mkfifo(path)
+
+    def open(self):
+        self.file = open(self.path, self.direction, encoding=self.encoding)
+
+    def close(self):
+        if self.file is None:
+            return
+        try:
+            self.file.close()
+            os.unlink(self.path)
+        except FileNotFoundError:
+            # it seems like we keep calling this twice. no idea why, but we don't need the resulting error.
+            pass
+        except Exception:
+            logger.exception("Pipe.close()")
+
+    def __str__(self):
+        return self.path
+
+
+class WritingPipe(Pipe):
+    def __init__(self, path, encoding=None):
+        super().__init__(path, "w", encoding=encoding)
+
+    def write(self, data):
+        if self.file is None:
+            self.open()
+        r =self.file.write(data)
+        self.file.flush()
+        return r
+
+
+class ReadingPipe(Pipe):
+    def __init__(self, path, encoding=None):
+        super().__init__(path, "r", encoding=encoding)
+
+    def read(self):
+        if self.file is None:
+            self.open()
+        return self.file.read()
+
+    def readline(self):
+        if self.file is None:
+            self.open()
+        return self.file.readline()
+
+
 class dsp(object):
     def __init__(self, output):
         self.samp_rate = 250000
@@ -94,19 +165,18 @@ class dsp(object):
         self.secondary_fft_size = 1024
         self.secondary_process_fft = None
         self.secondary_process_demod = None
-        self.pipe_names = [
+        self.pipe_names = {
-            "bpf_pipe",
+            "bpf_pipe": Pipe.WRITE,
-            "shift_pipe",
+            "shift_pipe": Pipe.WRITE,
-            "squelch_pipe",
+            "squelch_pipe": Pipe.WRITE,
-            "smeter_pipe",
+            "smeter_pipe": Pipe.READ,
-            "meta_pipe",
+            "meta_pipe": Pipe.READ,
-            "iqtee_pipe",
+            "iqtee_pipe": Pipe.NONE,
-            "iqtee2_pipe",
+            "iqtee2_pipe": Pipe.NONE,
-            "dmr_control_pipe",
+            "dmr_control_pipe": Pipe.WRITE,
-        ]
+        }
         self.pipes = {}
-        self.pipe_files = {}
+        self.secondary_pipe_names = {"secondary_shift_pipe": Pipe.WRITE}
-        self.secondary_pipe_names = ["secondary_shift_pipe"]
         self.secondary_offset_freq = 1000
         self.unvoiced_quality = 1
         self.modification_lock = threading.Lock()
@@ -380,14 +450,12 @@ class dsp(object):
 
         # open control pipes for csdr and send initialization data
         if self.has_pipe("secondary_shift_pipe"):  # TODO digimodes
-            self.pipe_files["secondary_shift_pipe"] = open(self.pipes["secondary_shift_pipe"], "w")  # TODO digimodes
             self.set_secondary_offset_freq(self.secondary_offset_freq)  # TODO digimodes
 
     def set_secondary_offset_freq(self, value):
         self.secondary_offset_freq = value
         if self.secondary_processes_running and self.has_pipe("secondary_shift_pipe"):
-            self.pipe_files["secondary_shift_pipe"].write("%g\n" % (-float(self.secondary_offset_freq) / self.if_samp_rate()))
+            self.pipes["secondary_shift_pipe"].write("%g\n" % (-float(self.secondary_offset_freq) / self.if_samp_rate()))
-            self.pipe_files["secondary_shift_pipe"].flush()
 
     def stop_secondary_demodulator(self):
         if not self.secondary_processes_running:
@@ -534,18 +602,16 @@ class dsp(object):
         self.offset_freq = offset_freq
         if self.running:
             with self.modification_lock:
-                self.pipe_files["shift_pipe"].write("%g\n" % (-float(self.offset_freq) / self.samp_rate))
+                self.pipes["shift_pipe"].write("%g\n" % (-float(self.offset_freq) / self.samp_rate))
-                self.pipe_files["shift_pipe"].flush()
 
     def set_bpf(self, low_cut, high_cut):
         self.low_cut = low_cut
         self.high_cut = high_cut
         if self.running:
             with self.modification_lock:
-                self.pipe_files["bpf_pipe"].write(
+                self.pipes["bpf_pipe"].write(
                     "%g %g\n" % (float(self.low_cut) / self.if_samp_rate(), float(self.high_cut) / self.if_samp_rate())
                 )
-                self.pipe_files["bpf_pipe"].flush()
 
     def get_bpf(self):
         return [self.low_cut, self.high_cut]
@@ -559,8 +625,7 @@ class dsp(object):
         actual_squelch = -150 if self.isDigitalVoice() or self.isPacket() or self.isPocsag() else self.squelch_level
         if self.running:
             with self.modification_lock:
-                self.pipe_files["squelch_pipe"].write("%g\n" % (self.convertToLinear(actual_squelch)))
+                self.pipes["squelch_pipe"].write("%g\n" % (self.convertToLinear(actual_squelch)))
-                self.pipe_files["squelch_pipe"].flush()
 
     def set_unvoiced_quality(self, q):
         self.unvoiced_quality = q
@@ -571,25 +636,21 @@ class dsp(object):
 
     def set_dmr_filter(self, filter):
         if self.has_pipe("dmr_control_pipe"):
-            self.pipe_files["dmr_control_pipe"].write("{0}\n".format(filter))
+            self.pipes["dmr_control_pipe"].write("{0}\n".format(filter))
-            self.pipe_files["dmr_control_pipe"].flush()
-
-    def mkfifo(self, path):
-        try:
-            os.unlink(path)
-        except:
-            pass
-        os.mkfifo(path)
 
     def ddc_transition_bw(self):
         return self.ddc_transition_bw_rate * (self.if_samp_rate() / float(self.samp_rate))
 
     def try_create_pipes(self, pipe_names, command_base):
-        for pipe_name in pipe_names:
+        for pipe_name, pipe_type in pipe_names.items():
             if "{" + pipe_name + "}" in command_base:
                 p = self.pipe_base_path + pipe_name
-                self.pipes[pipe_name] = p
+                encoding = None
-                self.mkfifo(p)
+                # TODO make digiham output unicode and then change this here
+                #      the whole pipe enoding feature onlye exists because of this
+                if pipe_name == "meta_pipe":
+                    encoding = "cp437"
+                self.pipes[pipe_name] = Pipe.create(p, pipe_type, encoding=encoding)
             else:
                 self.pipes[pipe_name] = None
 
@@ -599,15 +660,7 @@ class dsp(object):
     def try_delete_pipes(self, pipe_names):
         for pipe_name in pipe_names:
             if self.has_pipe(pipe_name):
-                pipe_path = self.pipes[pipe_name]
+                self.pipes[pipe_name].close()
-                try:
-                    os.unlink(pipe_path)
-                except FileNotFoundError:
-                    # it seems like we keep calling this twice. no idea why, but we don't need the resulting error.
-                    pass
-                except Exception:
-                    logger.exception("try_delete_pipes()")
-                finally:
                 self.pipes[pipe_name] = None
 
     def try_create_configs(self, command):
@@ -701,23 +754,16 @@ class dsp(object):
 
             self.start_secondary_demodulator()
 
-            # open control pipes for csdr
-            for p in ["bpf_pipe", "shift_pipe", "squelch_pipe", "dmr_control_pipe"]:
-                if self.has_pipe(p):
-                    self.pipe_files[p] = open(self.pipes[p], "w")
-
         # send initial config through the pipes
-        if self.has_pipe("squelch_pipe"):
-            self.set_squelch_level(self.squelch_level)
-        if self.has_pipe("shift_pipe"):
-            self.set_offset_freq(self.offset_freq)
         if self.has_pipe("bpf_pipe"):
             self.set_bpf(self.low_cut, self.high_cut)
+        if self.has_pipe("shift_pipe"):
+            self.set_offset_freq(self.offset_freq)
+        if self.has_pipe("squelch_pipe"):
+            self.set_squelch_level(self.squelch_level)
         if self.has_pipe("smeter_pipe"):
-            self.pipe_files["smeter_pipe"] = open(self.pipes["smeter_pipe"], "r")
-
             def read_smeter():
-                raw = self.pipe_files["smeter_pipe"].readline()
+                raw = self.pipes["smeter_pipe"].readline()
                 if len(raw) == 0:
                     return None
                 else:
@@ -725,11 +771,8 @@ class dsp(object):
 
             self.output.send_output("smeter", read_smeter)
         if self.has_pipe("meta_pipe"):
-            # TODO make digiham output unicode and then change this here
-            self.pipe_files["meta_pipe"] = open(self.pipes["meta_pipe"], "r", encoding="cp437")
-
             def read_meta():
-                raw = self.pipe_files["meta_pipe"].readline()
+                raw = self.pipes["meta_pipe"].readline()
                 if len(raw) == 0:
                     return None
                 else:
@@ -737,6 +780,10 @@ class dsp(object):
 
             self.output.send_output("meta", read_meta)
 
+        if self.csdr_dynamic_bufsize:
+            self.process.stdout.read(8)  # dummy read to skip bufsize & preamble
+            logger.debug("Note: CSDR_DYNAMIC_BUFSIZE_ON = 1")
+
     def stop(self):
         with self.modification_lock:
             self.running = False

owrx/fft.py

@@ -66,10 +66,6 @@ class SpectrumThread(csdr.output):
         return t == "audio"
 
     def receive_output(self, type, read_fn):
-        if self.props["csdr_dynamic_bufsize"]:
-            read_fn(8)  # dummy read to skip bufsize & preamble
-            logger.debug("Note: CSDR_DYNAMIC_BUFSIZE_ON = 1")
-
         threading.Thread(target=self.pump(read_fn, self.sdrSource.writeSpectrumData)).start()
 
     def stop(self):