0DMRMaster version 0.4

dmrtools/parrot_app.py

@@ -0,0 +1,102 @@
+import asyncio
+import logging
+import time
+
+from .app import App, IAppCallInterceptor, AppException
+from .call import Call
+from .dmrproto import DMRPPacketData
+
+
+class ParrotApp(App, IAppCallInterceptor):
+    """
+    Simple parrot application
+    """
+    def __init__(self, parrot_id: int = 9990, repeat_delay: int = 5,
+                 enable_unit: bool = True, enable_group: bool = True) -> None:
+        # settings
+        self.parrot_id: int = parrot_id
+        self.repeat_delay: int = repeat_delay
+        self.enable_unit: bool = enable_unit
+        self.enable_group: bool = enable_group
+
+        super().__init__()
+
+        # internal state
+        self._mycalls: set[int] = set()
+        self._records: dict[int, list[DMRPPacketData]] = dict()
+
+    @property
+    def name(self) -> str:
+        return self.get_name()
+
+    async def repeat(self, packets: list[DMRPPacketData]) -> None:
+        if self.dispatcher is None:
+            raise AppException(
+                "send_packets called before dispatcher had been set")
+
+        if len(packets) == 0:
+            logging.debug(f"{self.name}: nothing to repeat, 0 packets in call")
+            return
+
+        await asyncio.sleep(self.repeat_delay)
+
+        logging.info(f"{self.name}: repeating call")
+
+        stream_id = packets[0].stream_id
+        self._mycalls.add(stream_id)
+
+        start_time = time.monotonic()
+        for i, p in enumerate(packets):
+            self.dispatcher.inject_packet(p)
+            if (delay := start_time + (i + 1) * 0.06 - time.monotonic()) > 0:
+                await asyncio.sleep(delay)
+
+        self._mycalls.discard(stream_id)
+
+    def record(self, call: Call, p: DMRPPacketData) -> None:
+        if p.src_id == self.parrot_id or p.dst_id != self.parrot_id:
+            return
+
+        if (p.call_type == DMRPPacketData.CallType.UNIT
+            and not self.enable_unit):
+                logging.debug(f"{self.name}: unit calls disabled")
+                return
+
+        if (p.call_type == DMRPPacketData.CallType.GROUP
+            and not self.enable_group):
+                logging.debug(f"{self.name}: group calls disabled")
+                return
+
+        if p.stream_id in self._mycalls:
+            logging.debug(f"{self.name}: skipping my own call")
+            return
+
+        if p.stream_id not in self._records:
+            logging.info(f"{self.name}: recording {call.call_id}")
+            self._records[p.stream_id] = []
+
+        ans_p = p.copy()
+
+        # invert source and dest for unit call
+        if p.call_type == DMRPPacketData.CallType.UNIT:
+            ans_p.src_id = self.parrot_id
+            ans_p.dst_id = p.src_id
+
+        ans_p.stream_id = p.stream_id + 1
+
+        self._records[p.stream_id].append(ans_p)
+
+        if call.is_ended:
+            packets: list[DMRPPacketData] = self._records[p.stream_id]
+            asyncio.create_task(self.repeat(packets))
+            del self._records[p.stream_id]
+
+    #------------------------------------
+    # App implementation
+    def get_name(self) -> str:
+        return f"Parrot {self.parrot_id}"
+
+    #------------------------------------
+    # IAppCallInterceptor implementation
+    def process_call_packet(self, call: Call, p: DMRPPacketData) -> None:
+        self.record(call, p)