feat: add local Resemblyzer speaker recognition

2026-09-11 13:49:27 +02:00
parent 43fc8aaec0
commit f86af983e8
48 changed files with 5250 additions and 273 deletions
@@ -0,0 +1,47 @@
+using MeetingAssistant.Speakers;
+
+namespace MeetingAssistant.Tests;
+
+public sealed class SpeakerIdentityMergerTests
+{
+    [Fact]
+    public void MergeIntoRetainsNewestDistinctVoiceVectorsUpToConfiguredLimit()
+    {
+        var now = DateTimeOffset.UtcNow;
+        var target = new SpeakerIdentity
+        {
+            CanonicalName = "Chris",
+            VoiceVectors =
+            [
+                Vector("oldest", 1, now.AddMinutes(-4)),
+                Vector("duplicate", 2, now.AddMinutes(-3))
+            ]
+        };
+        var source = new SpeakerIdentity
+        {
+            VoiceVectors =
+            [
+                Vector("duplicate", 2, now.AddMinutes(-2)),
+                Vector("newer", 3, now.AddMinutes(-1)),
+                Vector("newest", 4, now)
+            ]
+        };
+
+        SpeakerIdentityMerger.MergeInto(target, source, maxSnippets: 3, maxVoiceVectors: 3);
+
+        Assert.Equal(["duplicate", "newer", "newest"], target.VoiceVectors.Select(vector => vector.Fingerprint).Order());
+        Assert.All(target.VoiceVectors, vector => Assert.Same(target, vector.SpeakerIdentity));
+    }
+
+    private static SpeakerVoiceVector Vector(string fingerprint, byte value, DateTimeOffset createdAt)
+    {
+        return new SpeakerVoiceVector
+        {
+            ModelId = "model",
+            Dimensions = 256,
+            VectorBytes = Enumerable.Repeat(value, 256 * sizeof(float)).ToArray(),
+            Fingerprint = fingerprint,
+            CreatedAt = createdAt
+        };
+    }
+}