Add AudioSource interface

rhubarb/src/main/kotlin/audio/AudioSource.kt

@@ -0,0 +1,25 @@
+package com.rhubarb_lip_sync.audio
+
+typealias SampleArray = FloatArray
+
+/** A sampled monaural audio signal with a fixed duration */
+interface AudioSource {
+	/** The sample rate in Hz */
+	val sampleRate: Int
+
+	/** The number of samples */
+	val size: Int
+
+	/**
+	 * Returns a new sample array containing the specified audio segment.
+	 *
+	 * @param start The index of the first sample to be included
+	 * @param end The index of the first sample *not* to be included
+	 *
+	 * @throws IllegalArgumentException if [start] < 0 or [start] > [end] or [end] > [size]
+	 */
+	suspend fun getSamples(start: Int, end: Int): SampleArray
+}
+
+/** An audio source that requires closing to free resources */
+interface AutoCloseableAudioSource : AudioSource, AutoCloseable