Remove swift-snapshot-testing dependency

Author: jcavar

Package.resolved

@@ -1,4 +1,4 @@
-// swift-tools-version: 6.0
+// swift-tools-version: 6.2
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -12,15 +12,9 @@ let package = Package(
             targets: ["AudioSnapshotTesting"]
         )
     ],
-    dependencies: [
-        .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.17.6")
-    ],
     targets: [
         .target(
-            name: "AudioSnapshotTesting",
-            dependencies: [
-                .product(name: "SnapshotTesting", package: "swift-snapshot-testing")
-            ]
+            name: "AudioSnapshotTesting"
         ),
         .testTarget(
             name: "AudioSnapshotTestingTests",

Package.swift

@@ -0,0 +1,8 @@
+/// Specifies the amplitude scaling method for spectrograms.
+public enum AmplitudeScale: Sendable {
+    /// Linear amplitude scale (raw FFT magnitudes normalized to 0...1)
+    case linear
+    /// Logarithmic amplitude scale in decibels with specified dynamic range
+    /// - Parameter range: The dB range from minimum to maximum (e.g., 120 means -120dB to 0dB)
+    case logarithmic(range: Float)
+}

Sources/AudioSnapshotTesting/AudioSnapshotTesting.swift

@@ -0,0 +1,37 @@
+/// Defines the visualization strategy for audio snapshot failures.
+public enum AudioSnapshotStrategy: Sendable {
+    /// Waveform visualization.
+    /// - Parameters:
+    ///   - width: The width of the resulting image.
+    ///   - height: The height of the resulting image.
+    ///   - strategy: The strategy to use when generating the waveform. Defaults to `.joinedLines`.
+    ///   - mono: Whether to mix down to a mono signal. Defaults to `true`.
+    case waveform(width: Int, height: Int, strategy: WaveformStrategy = .joinedLines, mono: Bool = true)
+
+    /// Frequency spectrum visualization.
+    /// - Parameters:
+    ///   - width: The width of the resulting image.
+    ///   - height: The height of the resulting image.
+    ///   - window: Optional window function for FFT. Uses Hann window if not provided.
+    ///   - threshold: Minimum amplitude threshold for frequency bins. Defaults to `0.005`.
+    /// - Note: Requires iOS 16+ or macOS 13+.
+    case spectrum(width: Int, height: Int, window: [Float]? = nil, threshold: Float = 0.005)
+
+    /// Spectrogram visualization.
+    /// - Parameters:
+    ///   - hopSize: The number of audio frames between successive spectral frames.
+    ///   - frequencyCount: The number of frequency bins to include in each spectral frame.
+    ///   - window: Optional window function for FFT. Uses Hann window if not provided.
+    ///   - amplitudeScale: The amplitude scaling method. Defaults to `.logarithmic(range: 120)`.
+    ///   - imageWidth: The width of the resulting image. Defaults to `1000`.
+    /// - Note: Requires iOS 16+ or macOS 13+.
+    case spectrogram(hopSize: Int, frequencyCount: Int, window: [Float]? = nil, amplitudeScale: AmplitudeScale = .logarithmic(range: 120), imageWidth: Int = 1000)
+
+    /// Overlay waveform visualization comparing two buffers.
+    /// - Parameters:
+    ///   - width: The width of the resulting image.
+    ///   - height: The height of the resulting image.
+    ///   - strategy: The strategy to use when generating the waveform. Defaults to `.joinedLines`.
+    ///   - mono: Whether to mix down to a mono signal. Defaults to `true`.
+    case overlayWaveform(width: Int, height: Int, strategy: WaveformStrategy = .joinedLines, mono: Bool = true)
+}