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/*
* Copyright (C) 2014 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 android.midi;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
/**
* This class contains information to describe a MIDI device.
* For now we only have information that can be retrieved easily for USB devices,
* but we will probably expand this in the future.
*
* This class is just an immutable object to encapsulate the MIDI device description.
* Use the MidiDevice class to actually communicate with devices.
*
* @hide
*/
public class MidiDeviceInfo implements Parcelable {
private static final String TAG = "MidiDeviceInfo";
/**
* Constant representing USB MIDI devices for {@link #getType}
*/
public static final int TYPE_USB = 1;
/**
* Constant representing virtual (software based) MIDI devices for {@link #getType}
*/
public static final int TYPE_VIRTUAL = 2;
private final int mType; // USB or virtual
private final int mId; // unique ID generated by MidiService
private final int mInputPortCount;
private final int mOutputPortCount;
private final Bundle mProperties;
/**
* Bundle key for the device's manufacturer name property.
* Used with the {@link android.os.Bundle} returned by {@link #getProperties}.
* Matches the USB device manufacturer name string for USB MIDI devices.
*/
public static final String PROPERTY_MANUFACTURER = "manufacturer";
/**
* Bundle key for the device's model name property.
* Used with the {@link android.os.Bundle} returned by {@link #getProperties}
* Matches the USB device product name string for USB MIDI devices.
*/
public static final String PROPERTY_MODEL = "model";
/**
* Bundle key for the device's serial number property.
* Used with the {@link android.os.Bundle} returned by {@link #getProperties}
* Matches the USB device serial number for USB MIDI devices.
*/
public static final String PROPERTY_SERIAL_NUMBER = "serial_number";
/**
* Bundle key for the device's {@link android.hardware.usb.UsbDevice}.
* Only set for USB MIDI devices.
* Used with the {@link android.os.Bundle} returned by {@link #getProperties}
*/
public static final String PROPERTY_USB_DEVICE = "usb_device";
/**
* Bundle key for the device's ALSA card number.
* Only set for USB MIDI devices.
* Used with the {@link android.os.Bundle} returned by {@link #getProperties}
*/
public static final String PROPERTY_ALSA_CARD = "alsa_card";
/**
* Bundle key for the device's ALSA device number.
* Only set for USB MIDI devices.
* Used with the {@link android.os.Bundle} returned by {@link #getProperties}
*/
public static final String PROPERTY_ALSA_DEVICE = "alsa_device";
/**
* MidiDeviceInfo should only be instantiated by MidiService implementation
* @hide
*/
public MidiDeviceInfo(int type, int id, int numInputPorts, int numOutputPorts,
Bundle properties) {
mType = type;
mId = id;
mInputPortCount = numInputPorts;
mOutputPortCount = numOutputPorts;
mProperties = properties;
}
/**
* Returns the type of the device.
*
* @return the device's type
*/
public int getType() {
return mType;
}
/**
* Returns the ID of the device.
* This ID is generated by the MIDI service and is not persistent across device unplugs.
*
* @return the device's ID
*/
public int getId() {
return mId;
}
/**
* Returns the device's number of input ports.
*
* @return the number of input ports
*/
public int getInputPortCount() {
return mInputPortCount;
}
/**
* Returns the device's number of output ports.
*
* @return the number of output ports
*/
public int getOutputPortCount() {
return mOutputPortCount;
}
/**
* Returns the {@link android.os.Bundle} containing the device's properties.
*
* @return the device's properties
*/
public Bundle getProperties() {
return mProperties;
}
@Override
public boolean equals(Object o) {
if (o instanceof MidiDeviceInfo) {
return (((MidiDeviceInfo)o).mId == mId);
} else {
return false;
}
}
@Override
public int hashCode() {
return mId;
}
@Override
public String toString() {
return ("MidiDeviceInfo[mType=" + mType +
",mInputPortCount=" + mInputPortCount +
",mOutputPortCount=" + mOutputPortCount +
",mProperties=" + mProperties);
}
public static final Parcelable.Creator<MidiDeviceInfo> CREATOR =
new Parcelable.Creator<MidiDeviceInfo>() {
public MidiDeviceInfo createFromParcel(Parcel in) {
int type = in.readInt();
int id = in.readInt();
int inputPorts = in.readInt();
int outputPorts = in.readInt();
Bundle properties = in.readBundle();
return new MidiDeviceInfo(type, id, inputPorts, outputPorts, properties);
}
public MidiDeviceInfo[] newArray(int size) {
return new MidiDeviceInfo[size];
}
};
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel parcel, int flags) {
parcel.writeInt(mType);
parcel.writeInt(mId);
parcel.writeInt(mInputPortCount);
parcel.writeInt(mOutputPortCount);
parcel.writeBundle(mProperties);
}
}
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