clocks: added new BaseClock and SystemClock

src/pipecat/clocks/base_clock.py

@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2024, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+from abc import ABC, abstractmethod
+
+
+class BaseClock(ABC):
+
+    @abstractmethod
+    def get_time(self) -> int:
+        pass
+
+    @abstractmethod
+    def start(self):
+        pass

src/pipecat/clocks/system_clock.py

@@ -0,0 +1,21 @@
+#
+# Copyright (c) 2024, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+import time
+
+from pipecat.clocks.base_clock import BaseClock
+
+
+class SystemClock(BaseClock):
+
+    def __init__(self):
+        self._time = 0
+
+    def get_time(self) -> int:
+        return time.monotonic_ns() - self._time if self._time > 0 else 0
+
+    def start(self):
+        self._time = time.monotonic_ns()