From 1da46af71f9f192d534886325d5ea530c78bee38 Mon Sep 17 00:00:00 2001
From: Jon Nordby <jononor@gmail.com>
Date: Wed, 14 May 2025 20:21:50 +0200
Subject: bindings: Improve test for PDM to PCM

---
 bindings/test_galearn_pdm.py | 38 ++++++++++++++++++++++++++++++++------
 1 file changed, 32 insertions(+), 6 deletions(-)

(limited to 'bindings')

diff --git a/bindings/test_galearn_pdm.py b/bindings/test_galearn_pdm.py
index 43cb58e..b0fda96 100644
--- a/bindings/test_galearn_pdm.py
+++ b/bindings/test_galearn_pdm.py
@@ -1,16 +1,42 @@
 
-import galearn_pdm
 import numpy
 
+from pcm2pdm import convert
+from testsignal import generate_test_tone
+from test_pdm import plot_reconstruct
+import galearn_pdm
+
+sr = 16000
+decimation = 64
+
 def test_one():
     
-    inp = numpy.ones(shape=10, dtype=numpy.uint8)
-    out = numpy.zeros(shape=10, dtype=numpy.int16)    
+    sig = generate_test_tone(duration_sec=0.004,
+        freqs=[1000.0], noise_level=0.0, sample_rate=sr, amplitude=0.9,
+    )
+
+    pdm_data = convert(sig)
+
+    inp = pdm_data # numpy.ones(shape=10, dtype=numpy.uint8)
+    print(inp.shape, inp.dtype)
+    print(inp)
 
-    galearn_pdm.process(inp, out)
+    out = numpy.zeros(shape=len(inp)//decimation, dtype=numpy.int16)
+
+    n_samples = galearn_pdm.process(inp, out)
+    out = out / 1024
+
+    print(numpy.mean(out))
     print(out)
-    assert out[0] == 2
-    assert out[-1] == 2
+
+
+    fig = plot_reconstruct(sig, pdm_data, out, sr=sr, aspect=6.0)
+    plot_path = 'pdm_verilated_1khz.png'
+    fig.savefig(plot_path)
+
+    #assert out[0] == 2
+    #assert out[-1] == 2
+
 
 if __name__ == '__main__':
     test_one()
-- 
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