init

lib_audio_dsp/test/json/test_delay_pipeline.py

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+# Copyright 2025 XMOS LIMITED.
+# This Software is subject to the terms of the XMOS Public Licence: Version 1.
+"""Test delay pipeline creation."""
+
+from audio_dsp.design.parse_json import DspJson, make_pipeline, pipeline_to_dspjson
+from audio_dsp.stages.signal_chain import Delay
+
+
+def test_simple_delay_pipeline():
+    """Test creating a simple delay pipeline."""
+    print("Creating simple stereo delay pipeline...")
+    
+    # Create a simple stereo delay pipeline JSON
+    pipeline_json = {
+        "ir_version": 1,
+        "producer_name": "test_delay",
+        "producer_version": "0.1",
+        "graph": {
+            "name": "Simple Delay",
+            "fs": 48000,
+            "nodes": [
+                {
+                    "op_type": "Delay",
+                    "config": {
+                        "max_delay": 2048,
+                        "units": "samples"
+                    },
+                    "parameters": {
+                        "delay": 1024,
+                    },
+                    "placement": {
+                        "input": [["inputs", 0], ["inputs", 1]],
+                        "name": "StereoDelay",
+                        "thread": 0
+                    }
+                }
+            ],
+            "inputs": [
+                {
+                    "name": "inputs",
+                    "channels": 2
+                }
+            ],
+            "outputs": [
+                {
+                    "name": "outputs",
+                    "input": [["StereoDelay", 0], ["StereoDelay", 1]],
+                }
+            ]
+        }
+    }
+    
+    dsp_json = DspJson(**pipeline_json)
+    pipeline = make_pipeline(dsp_json)
+
+    # Find our delay stage
+    delay_stage = None
+    for stage in pipeline.stages:
+        if isinstance(stage, Delay):
+            delay_stage = stage
+            break
+            
+    assert delay_stage is not None, "Could not find Delay stage in pipeline"
+    assert delay_stage.max_delay == 2048, f"Expected max_delay 2048, got {delay_stage.max_delay}"
+    assert delay_stage.units == "samples", f"Expected units 'samples', got {delay_stage.units}"
+    assert delay_stage.parameters.delay == 1024, f"Expected delay 1024, got {delay_stage.parameters.delay}"
+
+    new_json = pipeline_to_dspjson(pipeline)
+    assert dsp_json.graph == new_json.graph, "Pipeline JSON does not match original"
+    
+
+
+if __name__ == "__main__":
+    test_simple_delay_pipeline()