Add validation for num_10ms_chunks parameter

Ensure num_10ms_chunks is a positive integer to prevent division by zero
or invalid audio chunk sizes. Raises ValueError if value is less than 1.

src/pipecat/transports/smallwebrtc/transport.py

@@ -84,7 +84,12 @@ class RawAudioTrack(AudioStreamTrack):
         Args:
             sample_rate: The audio sample rate in Hz.
             num_10ms_chunks: Number of 10ms chunks per output frame (default 1).
+
+        Raises:
+            ValueError: If num_10ms_chunks is not a positive integer.
         """
+        if num_10ms_chunks < 1:
+            raise ValueError(f"num_10ms_chunks must be a positive integer, got {num_10ms_chunks}")
         super().__init__()
         self._sample_rate = sample_rate
         self._num_10ms_chunks = num_10ms_chunks

tests/test_smallwebrtc_transport.py

@@ -137,3 +137,17 @@ class TestRawAudioTrack:
         for sample_rate, num_chunks, expected_bytes in test_cases:
             track = RawAudioTrack(sample_rate=sample_rate, num_10ms_chunks=num_chunks)
             assert track._bytes_per_chunk == expected_bytes
+
+    def test_invalid_num_10ms_chunks_zero(self):
+        """Test that num_10ms_chunks=0 raises ValueError."""
+        with pytest.raises(ValueError) as exc_info:
+            RawAudioTrack(sample_rate=16000, num_10ms_chunks=0)
+
+        assert "positive integer" in str(exc_info.value)
+
+    def test_invalid_num_10ms_chunks_negative(self):
+        """Test that negative num_10ms_chunks raises ValueError."""
+        with pytest.raises(ValueError) as exc_info:
+            RawAudioTrack(sample_rate=16000, num_10ms_chunks=-1)
+
+        assert "positive integer" in str(exc_info.value)