1*90c8c64dSAndroid Build Coastguard Worker /*
2*90c8c64dSAndroid Build Coastguard Worker  * Copyright (C) 2015 The Android Open Source Project
3*90c8c64dSAndroid Build Coastguard Worker  *
4*90c8c64dSAndroid Build Coastguard Worker  * Licensed under the Apache License, Version 2.0 (the "License");
5*90c8c64dSAndroid Build Coastguard Worker  * you may not use this file except in compliance with the License.
6*90c8c64dSAndroid Build Coastguard Worker  * You may obtain a copy of the License at
7*90c8c64dSAndroid Build Coastguard Worker  *
8*90c8c64dSAndroid Build Coastguard Worker  *      http://www.apache.org/licenses/LICENSE-2.0
9*90c8c64dSAndroid Build Coastguard Worker  *
10*90c8c64dSAndroid Build Coastguard Worker  * Unless required by applicable law or agreed to in writing, software
11*90c8c64dSAndroid Build Coastguard Worker  * distributed under the License is distributed on an "AS IS" BASIS,
12*90c8c64dSAndroid Build Coastguard Worker  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*90c8c64dSAndroid Build Coastguard Worker  * See the License for the specific language governing permissions and
14*90c8c64dSAndroid Build Coastguard Worker  * limitations under the License.
15*90c8c64dSAndroid Build Coastguard Worker  */
16*90c8c64dSAndroid Build Coastguard Worker 
17*90c8c64dSAndroid Build Coastguard Worker package com.example.android.midiscope;
18*90c8c64dSAndroid Build Coastguard Worker 
19*90c8c64dSAndroid Build Coastguard Worker import android.media.midi.MidiReceiver;
20*90c8c64dSAndroid Build Coastguard Worker import android.util.Log;
21*90c8c64dSAndroid Build Coastguard Worker 
22*90c8c64dSAndroid Build Coastguard Worker import java.io.IOException;
23*90c8c64dSAndroid Build Coastguard Worker import java.util.concurrent.TimeUnit;
24*90c8c64dSAndroid Build Coastguard Worker 
25*90c8c64dSAndroid Build Coastguard Worker /**
26*90c8c64dSAndroid Build Coastguard Worker  * Convert incoming MIDI messages to a string and write them to a ScopeLogger.
27*90c8c64dSAndroid Build Coastguard Worker  * Assume that messages have been aligned using a MidiFramer.
28*90c8c64dSAndroid Build Coastguard Worker  */
29*90c8c64dSAndroid Build Coastguard Worker public class LoggingReceiver extends MidiReceiver {
30*90c8c64dSAndroid Build Coastguard Worker     public static final String TAG = "MidiScope";
31*90c8c64dSAndroid Build Coastguard Worker     private static final long NANOS_PER_SECOND = TimeUnit.SECONDS.toNanos(1);
32*90c8c64dSAndroid Build Coastguard Worker     private long mStartTime;
33*90c8c64dSAndroid Build Coastguard Worker     private ScopeLogger mLogger;
34*90c8c64dSAndroid Build Coastguard Worker 
LoggingReceiver(ScopeLogger logger)35*90c8c64dSAndroid Build Coastguard Worker     public LoggingReceiver(ScopeLogger logger) {
36*90c8c64dSAndroid Build Coastguard Worker         mStartTime = System.nanoTime();
37*90c8c64dSAndroid Build Coastguard Worker         mLogger = logger;
38*90c8c64dSAndroid Build Coastguard Worker     }
39*90c8c64dSAndroid Build Coastguard Worker 
40*90c8c64dSAndroid Build Coastguard Worker     /*
41*90c8c64dSAndroid Build Coastguard Worker      * @see android.media.midi.MidiReceiver#onReceive(byte[], int, int, long)
42*90c8c64dSAndroid Build Coastguard Worker      */
43*90c8c64dSAndroid Build Coastguard Worker     @Override
onSend(byte[] data, int offset, int count, long timestamp)44*90c8c64dSAndroid Build Coastguard Worker     public void onSend(byte[] data, int offset, int count, long timestamp)
45*90c8c64dSAndroid Build Coastguard Worker             throws IOException {
46*90c8c64dSAndroid Build Coastguard Worker         StringBuilder sb = new StringBuilder();
47*90c8c64dSAndroid Build Coastguard Worker         if (timestamp == 0) {
48*90c8c64dSAndroid Build Coastguard Worker             sb.append(String.format("-----0----: "));
49*90c8c64dSAndroid Build Coastguard Worker         } else {
50*90c8c64dSAndroid Build Coastguard Worker             long monoTime = timestamp - mStartTime;
51*90c8c64dSAndroid Build Coastguard Worker             double seconds = (double) monoTime / NANOS_PER_SECOND;
52*90c8c64dSAndroid Build Coastguard Worker             sb.append(String.format("%10.3f: ", seconds));
53*90c8c64dSAndroid Build Coastguard Worker         }
54*90c8c64dSAndroid Build Coastguard Worker         sb.append(MidiPrinter.formatBytes(data, offset, count));
55*90c8c64dSAndroid Build Coastguard Worker         sb.append(": ");
56*90c8c64dSAndroid Build Coastguard Worker         sb.append(MidiPrinter.formatMessage(data, offset, count));
57*90c8c64dSAndroid Build Coastguard Worker         String text = sb.toString();
58*90c8c64dSAndroid Build Coastguard Worker         mLogger.log(text);
59*90c8c64dSAndroid Build Coastguard Worker         Log.i(TAG, text);
60*90c8c64dSAndroid Build Coastguard Worker     }
61*90c8c64dSAndroid Build Coastguard Worker 
62*90c8c64dSAndroid Build Coastguard Worker }