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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.midiscope;
import android.media.midi.MidiDeviceInfo;
import android.media.midi.MidiDeviceInfo.PortInfo;
import android.os.Bundle;
import com.example.android.common.midi.MidiConstants;
/**
* Format a MIDI message for printing.
*/
public class MidiPrinter {
public static final String[] CHANNEL_COMMAND_NAMES = { "NoteOff", "NoteOn",
"PolyTouch", "Control", "Program", "Pressure", "Bend" };
public static final String[] SYSTEM_COMMAND_NAMES = { "SysEx", // F0
"TimeCode", // F1
"SongPos", // F2
"SongSel", // F3
"F4", // F4
"F5", // F5
"TuneReq", // F6
"EndSysex", // F7
"TimingClock", // F8
"F9", // F9
"Start", // FA
"Continue", // FB
"Stop", // FC
"FD", // FD
"ActiveSensing", // FE
"Reset" // FF
};
public static String getName(int status) {
if (status >= 0xF0) {
int index = status & 0x0F;
return SYSTEM_COMMAND_NAMES[index];
} else if (status >= 0x80) {
int index = (status >> 4) & 0x07;
return CHANNEL_COMMAND_NAMES[index];
} else {
return "data";
}
}
public static String formatBytes(byte[] data, int offset, int count) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < count; i++) {
sb.append(String.format(" %02X", data[offset + i]));
}
return sb.toString();
}
public static String formatMessage(byte[] data, int offset, int count) {
StringBuilder sb = new StringBuilder();
byte statusByte = data[offset++];
int status = statusByte & 0xFF;
sb.append(getName(status)).append("(");
int numData = MidiConstants.getBytesPerMessage(statusByte) - 1;
if ((status >= 0x80) && (status < 0xF0)) { // channel message
int channel = status & 0x0F;
// Add 1 for humans who think channels are numbered 1-16.
sb.append((channel + 1)).append(", ");
}
for (int i = 0; i < numData; i++) {
if (i > 0) {
sb.append(", ");
}
sb.append(data[offset++]);
}
sb.append(")");
return sb.toString();
}
public static String formatDeviceInfo(MidiDeviceInfo info) {
StringBuilder sb = new StringBuilder();
if (info != null) {
Bundle properties = info.getProperties();
for (String key : properties.keySet()) {
Object value = properties.get(key);
sb.append(key).append(" = ").append(value).append('\n');
}
for (PortInfo port : info.getPorts()) {
sb.append((port.getType() == PortInfo.TYPE_INPUT) ? "input"
: "output");
sb.append("[").append(port.getPortNumber()).append("] = \"").append(port.getName()
+ "\"\n");
}
}
return sb.toString();
}
}
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