Consume Android batches with independent track completion

tools/chatgui-android/app/src/test/java/com/utun/chat/data/StreamReadQueueTest.kt

@@ -0,0 +1,55 @@
+package com.utun.chat.data
+
+import org.junit.Assert.*
+import org.junit.Test
+import java.nio.ByteBuffer
+
+class StreamReadQueueTest {
+    private fun record(kind: Int, pts: Long = 0, bytes: ByteArray = byteArrayOf()): ByteArray =
+        ByteBuffer.allocate(28 + bytes.size).apply {
+            put(0, kind.toByte()); putLong(8, pts); putInt(16, bytes.size); position(28); put(bytes)
+        }.array()
+
+    @Test fun videoEndPassesBlockedAudioButPreservesVideoOrder() {
+        val queue = StreamReadQueue()
+        queue.add(record(2, 20) + record(1, 40) + record(7) + record(8) + record(5))
+        assertNull(queue.take(video = false, audio = false))
+        assertEquals(1, queue.take(video = true, audio = false)!![0].toInt())
+        assertEquals(7, queue.take(video = false, audio = false)!![0].toInt())
+        assertNull(queue.take(video = false, audio = false))
+        assertEquals(2, queue.take(video = false, audio = true)!![0].toInt())
+        assertEquals(8, queue.take(video = false, audio = false)!![0].toInt())
+        assertEquals(5, queue.take(video = false, audio = false)!![0].toInt())
+        assertEquals(0, queue.size)
+    }
+
+    @Test fun audioEndPassesBlockedVideo() {
+        val queue = StreamReadQueue()
+        queue.add(record(1) + record(2) + record(8) + record(7) + record(5))
+        assertEquals(2, queue.take(video = false, audio = true)!![0].toInt())
+        assertEquals(8, queue.take(video = false, audio = false)!![0].toInt())
+        assertNull(queue.take(video = false, audio = false))
+        assertEquals(1, queue.take(video = true, audio = false)!![0].toInt())
+        assertEquals(7, queue.take(video = false, audio = false)!![0].toInt())
+        assertEquals(5, queue.take(video = false, audio = false)!![0].toInt())
+    }
+
+    @Test fun gapAndCloseImmediatelyCancelBlockedTracks() {
+        for (kind in listOf(3, 6)) {
+            val queue = StreamReadQueue()
+            queue.add(record(1) + record(2))
+            queue.add(record(kind))
+            assertEquals(kind, queue.take(video = false, audio = false)!![0].toInt())
+            assertEquals(0, queue.size)
+        }
+    }
+
+    @Test fun variablePayloadsKeepRecordBoundaries() {
+        val queue = StreamReadQueue()
+        val video = record(1, 42, byteArrayOf(1, 2, 3))
+        val audio = record(2, 43, byteArrayOf(4))
+        assertEquals(2, queue.add(video + audio))
+        assertArrayEquals(audio, queue.take(video = false, audio = true))
+        assertArrayEquals(video, queue.take(video = true, audio = false))
+    }
+}