USB MIDI: UsbMidiPacketConverterTests
This CL adds tests for UsbMidiPacketConverter. This converter is both complex and isolated so it's a good test target. Bug: 266473128 Test: atest com.android.server.usb.UsbMidiPacketConverterTest Change-Id: I1840c33a3ae67d6a445d81d1e613fdbe6ca8383e
This commit is contained in:
Robert Wu
@@ -0,0 +1,407 @@
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/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.usb;
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import static org.junit.Assert.assertEquals;
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import androidx.test.filters.SmallTest;
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import androidx.test.runner.AndroidJUnit4;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import java.util.Arrays;
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import java.util.Random;
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/**
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* Unit tests for com.android.server.usb.UsbMidiPacketConverter.
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*/
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@SmallTest
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@RunWith(AndroidJUnit4.class)
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public class UsbMidiPacketConverterTest {
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private byte[] generateRandomByteStream(Random rnd, int size) {
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byte[] output = new byte[size];
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rnd.nextBytes(output);
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return output;
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}
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private void compareByteArrays(byte[] expectedArray, byte[] outputArray) {
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assertEquals(expectedArray.length, outputArray.length);
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for (int i = 0; i < outputArray.length; i++) {
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assertEquals(expectedArray[i], outputArray[i]);
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}
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}
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@Test
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public void testDecoderSinglePacket() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createDecoders(2);
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byte[] input = new byte[] {0x19 /* Cable 1 Note-On */, (byte) 0x91, 0x33, 0x66};
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byte[] expectedOutputCable0 = new byte[] {};
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byte[] expectedOutputCable1 = new byte[] {(byte) 0x91, 0x33, 0x66};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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byte[] actualOutputCable1 = usbMidiPacketConverter.pullDecodedMidiPackets(1);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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compareByteArrays(expectedOutputCable1, actualOutputCable1);
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}
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@Test
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public void testDecoderMultiplePackets() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createDecoders(4);
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byte[] input = new byte[] {
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0x1B /* Cable 1 Control Change */, (byte) 0xB4, 0x55, 0x6E,
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0x35 /* Cable 3 Single byte SysEx */, (byte) 0xF8, 0x00, 0x00,
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0x02 /* Cable 0 Two byte System Common */, (byte) 0xF3, 0x12, 0x00};
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byte[] expectedOutputCable0 = new byte[] {(byte) 0xF3, 0x12};
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byte[] expectedOutputCable1 = new byte[] {(byte) 0xB4, 0x55, 0x6E};
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byte[] expectedOutputCable2 = new byte[] {};
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byte[] expectedOutputCable3 = new byte[] {(byte) 0xF8};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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byte[] actualOutputCable1 = usbMidiPacketConverter.pullDecodedMidiPackets(1);
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byte[] actualOutputCable2 = usbMidiPacketConverter.pullDecodedMidiPackets(2);
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byte[] actualOutputCable3 = usbMidiPacketConverter.pullDecodedMidiPackets(3);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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compareByteArrays(expectedOutputCable1, actualOutputCable1);
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compareByteArrays(expectedOutputCable2, actualOutputCable2);
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compareByteArrays(expectedOutputCable3, actualOutputCable3);
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}
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@Test
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public void testDecoderSysExEndFirstByte() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createDecoders(2);
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byte[] input = new byte[] {
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0x14 /* Cable 1 SysEx Start */, (byte) 0xF0, 0x00, 0x01,
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0x15 /* Cable 1 Single byte SysEx End */, (byte) 0xF7, 0x00, 0x00};
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byte[] expectedOutputCable0 = new byte[] {};
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byte[] expectedOutputCable1 = new byte[] {
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(byte) 0xF0, 0x00, 0x01,
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(byte) 0xF7};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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byte[] actualOutputCable1 = usbMidiPacketConverter.pullDecodedMidiPackets(1);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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compareByteArrays(expectedOutputCable1, actualOutputCable1);
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}
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@Test
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public void testDecoderSysExEndSecondByte() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createDecoders(1);
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byte[] input = new byte[] {
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0x04 /* Cable 0 SysEx Start */, (byte) 0xF0, 0x00, 0x01,
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0x06 /* Cable 0 Two byte SysEx End */, 0x02, (byte) 0xF7, 0x00};
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byte[] expectedOutputCable0 = new byte[] {
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(byte) 0xF0, 0x00, 0x01,
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0x02, (byte) 0xF7};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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}
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@Test
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public void testDecoderSysExEndThirdByte() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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byte[] input = new byte[] {
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0x04 /* Cable 0 SysEx Start */, (byte) 0xF0, 0x00, 0x01,
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0x07 /* Cable 0 Three byte SysEx End */, 0x02, 0x03, (byte) 0xF7};
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usbMidiPacketConverter.createDecoders(1);
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byte[] expectedOutputCable0 = new byte[] {
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(byte) 0xF0, 0x00, 0x01,
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0x02, 0x03, (byte) 0xF7};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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}
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@Test
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public void testDecoderSysExStartEnd() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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byte[] input = new byte[] {
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0x06 /* Cable 0 Two byte SysEx End */, (byte) 0xF0, (byte) 0xF7, 0x00};
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usbMidiPacketConverter.createDecoders(1);
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byte[] expectedOutputCable0 = new byte[] {
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(byte) 0xF0, (byte) 0xF7};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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}
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@Test
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public void testDecoderSysExStartByteEnd() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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byte[] input = new byte[] {
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0x07 /* Cable 0 Three byte SysEx End */, (byte) 0xF0, 0x44, (byte) 0xF7};
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usbMidiPacketConverter.createDecoders(1);
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byte[] expectedOutputCable0 = new byte[] {
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(byte) 0xF0, 0x44, (byte) 0xF7};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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}
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@Test
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public void testDecoderDefaultToFirstCable() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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byte[] input = new byte[] {0x49 /* Cable 4 Note-On */, (byte) 0x91, 0x22, 0x33};
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usbMidiPacketConverter.createDecoders(1);
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byte[] expectedOutputCable0 = new byte[] {
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(byte) 0x91, 0x22, 0x33};
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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byte[] actualOutputCable0 = usbMidiPacketConverter.pullDecodedMidiPackets(0);
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compareByteArrays(expectedOutputCable0, actualOutputCable0);
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}
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@Test
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public void testDecoderLargePacketDoesNotCrash() {
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for (long seed = 1001; seed < 5000; seed += 777) {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createDecoders(3);
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Random rnd = new Random(seed);
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byte[] input = generateRandomByteStream(rnd, 1003 /* arbitrary large size */);
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usbMidiPacketConverter.decodeMidiPackets(input, input.length);
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usbMidiPacketConverter.pullDecodedMidiPackets(0);
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usbMidiPacketConverter.pullDecodedMidiPackets(1);
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usbMidiPacketConverter.pullDecodedMidiPackets(2);
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}
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}
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@Test
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public void testEncoderBasic() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {(byte) 0x91 /* Note-On */, 0x33, 0x66};
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byte[] expectedOutput = new byte[] {
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0x09 /* Cable 0 Note-On */, (byte) 0x91, 0x33, 0x66};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderMultiplePackets() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(3);
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byte[] inputCable2 = new byte[] {
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(byte) 0xB4 /* Control Change */, 0x55, 0x6E};
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byte[] inputCable1 = new byte[] {
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(byte) 0xF8 /* Timing Clock (Single Byte) */,
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(byte) 0xF3 /* Song Select (Two Bytes) */, 0x12};
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byte[] expectedOutput = new byte[] {
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0x2B /* Cable 2 Control Change */, (byte) 0xB4, 0x55, 0x6E,
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0x15 /* Cable 1 Timing Clock */, (byte) 0xF8, 0x00, 0x00,
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0x12 /* Cable 1 Two Byte System Common */, (byte) 0xF3, 0x12, 0x00};
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usbMidiPacketConverter.encodeMidiPackets(inputCable2, inputCable2.length, 2);
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usbMidiPacketConverter.encodeMidiPackets(inputCable1, inputCable1.length, 1);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderWeavePackets() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(2);
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byte[] inputCable1Msg1 = new byte[] {
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(byte) 0x93 /* Note-On */, 0x23, 0x43};
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byte[] inputCable0Msg = new byte[] {
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(byte) 0xB4 /* Control Change */, 0x65, 0x26};
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byte[] inputCable1Msg2 = new byte[] {
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(byte) 0xA4 /* Poly-KeyPress */, 0x52, 0x76};
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byte[] expectedOutput = new byte[] {
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0x19 /* Cable 1 Note-On */, (byte) 0x93, 0x23, 0x43,
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0x0B /* Cable 0 Control Change */, (byte) 0xB4, 0x65, 0x26,
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0x1A /* Cable 1 Poly-KeyPress */, (byte) 0xA4, 0x52, 0x76};
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usbMidiPacketConverter.encodeMidiPackets(inputCable1Msg1, inputCable1Msg1.length, 1);
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usbMidiPacketConverter.encodeMidiPackets(inputCable0Msg, inputCable0Msg.length, 0);
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usbMidiPacketConverter.encodeMidiPackets(inputCable1Msg2, inputCable1Msg2.length, 1);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderSysExEndFirstByte() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, 0x00, 0x01,
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(byte) 0xF7 /* SysEx End */};
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byte[] expectedOutput = new byte[] {
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0x04 /* Cable 0 Three Byte SysEx Start */, (byte) 0xF0, 0x00, 0x01,
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0x05 /* Cable 0 One Byte SysEx End */, (byte) 0xF7, 0x00, 0x00};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderSysExEndSecondByte() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, 0x00, 0x01,
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0x02, (byte) 0xF7 /* SysEx End */};
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byte[] expectedOutput = new byte[] {
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0x04 /* Cable 0 Three Byte SysEx Start */, (byte) 0xF0, 0x00, 0x01,
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0x06 /* Cable 0 Two Byte SysEx End */, 0x02, (byte) 0xF7, 0x00};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderSysExEndThirdByte() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, 0x00, 0x01,
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0x02, 0x03, (byte) 0xF7 /* SysEx End */};
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byte[] expectedOutput = new byte[] {
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0x04 /* Cable 0 Three Byte SysEx Start */, (byte) 0xF0, 0x00, 0x01,
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0x07 /* Cable 0 Three Byte SysEx End */, 0x02, 0x03, (byte) 0xF7};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderSysExStartEnd() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, (byte) 0xF7 /* SysEx End */};
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byte[] expectedOutput = new byte[] {
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0x06 /* Cable 0 Two Byte SysEx End */, (byte) 0xF0, (byte) 0xF7, 0x00};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderSysExStartByteEnd() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, 0x44, (byte) 0xF7 /* SysEx End */};
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byte[] expectedOutput = new byte[] {
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0x07 /* Cable 0 Three Byte SysEx End */, (byte) 0xF0, 0x44, (byte) 0xF7};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderMultiplePulls() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(1);
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byte[] input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, 0x44, 0x55,
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0x66, 0x77}; // 0x66 and 0x77 will not be pulled the first time
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byte[] expectedOutput = new byte[] {
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0x04 /* SysEx Start */, (byte) 0xF0, 0x44, 0x55};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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input = new byte[] {
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0x11, // Combined with 0x66 and 0x77 above
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0x22, (byte) 0xF7 /* SysEx End */};
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expectedOutput = new byte[] {
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0x04 /* Cable 0 SysEx Continue */, 0x66, 0x77, 0x11,
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0x06 /* Cable 0 Two Byte SysEx End */, 0x22, (byte) 0xF7, 0x00};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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input = new byte[] {
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(byte) 0xF0 /* SysEx Start */, (byte) 0xF7 /* SysEx End */};
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expectedOutput = new byte[] {
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0x06 /* Cable 0 Two Byte SysEx End */, (byte) 0xF0, (byte) 0xF7, 0x00};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 0);
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output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderDefaultToFirstCable() {
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(2);
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byte[] input = new byte[] {(byte) 0x91 /* Note-On */, 0x22, 0x33};
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byte[] expectedOutput = new byte[] {
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0x09 /* Cable 0 Note-On */, (byte) 0x91, 0x22, 0x33};
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, 4);
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byte[] output = usbMidiPacketConverter.pullEncodedMidiPackets();
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compareByteArrays(expectedOutput, output);
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}
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@Test
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public void testEncoderLargePacketDoesNotCrash() {
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for (long seed = 234; seed < 4000; seed += 666) {
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Random rnd = new Random(seed);
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UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
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usbMidiPacketConverter.createEncoders(4);
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for (int cableNumber = 0; cableNumber < 4; cableNumber++) {
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byte[] input = generateRandomByteStream(rnd, 1003 /* arbitrary large size */);
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usbMidiPacketConverter.encodeMidiPackets(input, input.length, cableNumber);
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}
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usbMidiPacketConverter.pullEncodedMidiPackets();
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}
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}
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@Test
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public void testEncodeDecode() {
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final int bufferSize = 30;
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final int numCables = 16;
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final int bytesToEncodePerEncoding = 10;
|
||||
byte[][] rawMidi = new byte[numCables][bufferSize];
|
||||
for (long seed = 45; seed < 3000; seed += 300) {
|
||||
Random rnd = new Random(seed);
|
||||
for (int cableNumber = 0; cableNumber < numCables; cableNumber++) {
|
||||
rawMidi[cableNumber] = generateRandomByteStream(rnd, bufferSize);
|
||||
|
||||
// Change the last byte to SysEx End.
|
||||
// This way the encoder is guaranteed to flush all packets.
|
||||
rawMidi[cableNumber][bufferSize - 1] = (byte) 0xF7;
|
||||
}
|
||||
UsbMidiPacketConverter usbMidiPacketConverter = new UsbMidiPacketConverter();
|
||||
usbMidiPacketConverter.createEncoders(numCables);
|
||||
// Encode packets and interweave them
|
||||
for (int startByte = 0; startByte < bufferSize;
|
||||
startByte += bytesToEncodePerEncoding) {
|
||||
for (int cableNumber = 0; cableNumber < numCables; cableNumber++) {
|
||||
byte[] bytesToEncode = Arrays.copyOfRange(rawMidi[cableNumber], startByte,
|
||||
startByte + bytesToEncodePerEncoding);
|
||||
usbMidiPacketConverter.encodeMidiPackets(bytesToEncode, bytesToEncode.length,
|
||||
cableNumber);
|
||||
}
|
||||
}
|
||||
byte[] usbMidi = usbMidiPacketConverter.pullEncodedMidiPackets();
|
||||
|
||||
usbMidiPacketConverter.createDecoders(numCables);
|
||||
|
||||
// Now decode the MIDI packets to check if they are the same as the original
|
||||
usbMidiPacketConverter.decodeMidiPackets(usbMidi, usbMidi.length);
|
||||
for (int cableNumber = 0; cableNumber < numCables; cableNumber++) {
|
||||
byte[] decodedRawMidi = usbMidiPacketConverter.pullDecodedMidiPackets(cableNumber);
|
||||
compareByteArrays(rawMidi[cableNumber], decodedRawMidi);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user