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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* 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.media.audiopolicy;
import android.media.AudioAttributes;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.audiopolicy.AudioMixingRule.AttributeMatchCriterion;
import android.os.Binder;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.Log;
import java.util.ArrayList;
/**
* @hide
* Internal storage class for AudioPolicy configuration.
*/
public class AudioPolicyConfig implements Parcelable {
private static final String TAG = "AudioPolicyConfig";
ArrayList mMixes;
AudioPolicyConfig(ArrayList mixes) {
mMixes = mixes;
}
/**
* Add an {@link AudioMix} to be part of the audio policy being built.
* @param mix a non-null {@link AudioMix} to be part of the audio policy.
* @return the same Builder instance.
* @throws IllegalArgumentException
*/
public void addMix(AudioMix mix) throws IllegalArgumentException {
if (mix == null) {
throw new IllegalArgumentException("Illegal null AudioMix argument");
}
mMixes.add(mix);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mMixes.size());
for (AudioMix mix : mMixes) {
// write mix route flags
dest.writeInt(mix.getRouteFlags());
// write mix format
dest.writeInt(mix.getFormat().getSampleRate());
dest.writeInt(mix.getFormat().getEncoding());
dest.writeInt(mix.getFormat().getChannelMask());
// write mix rules
final ArrayList criteria = mix.getRule().getCriteria();
dest.writeInt(criteria.size());
for (AttributeMatchCriterion criterion : criteria) {
dest.writeInt(criterion.mRule);
dest.writeInt(criterion.mAttr.getUsage());
}
}
}
private AudioPolicyConfig(Parcel in) {
mMixes = new ArrayList();
int nbMixes = in.readInt();
for (int i = 0 ; i < nbMixes ; i++) {
final AudioMix.Builder mixBuilder = new AudioMix.Builder();
// read mix route flags
int routeFlags = in.readInt();
mixBuilder.setRouteFlags(routeFlags);
// read mix format
int sampleRate = in.readInt();
int encoding = in.readInt();
int channelMask = in.readInt();
final AudioFormat format = new AudioFormat.Builder().setSampleRate(sampleRate)
.setChannelMask(channelMask).setEncoding(encoding).build();
mixBuilder.setFormat(format);
// read mix rules
int nbRules = in.readInt();
AudioMixingRule.Builder ruleBuilder = new AudioMixingRule.Builder();
for (int j = 0 ; j < nbRules ; j++) {
// read the matching rules
int matchRule = in.readInt();
if ((matchRule == AudioMixingRule.RULE_EXCLUDE_ATTRIBUTE_USAGE)
|| (matchRule == AudioMixingRule.RULE_MATCH_ATTRIBUTE_USAGE)) {
int usage = in.readInt();
final AudioAttributes attr = new AudioAttributes.Builder()
.setUsage(usage).build();
ruleBuilder.addRule(attr, matchRule);
} else {
Log.w(TAG, "Encountered unsupported rule, skipping");
in.readInt();
}
}
mixBuilder.setMixingRule(ruleBuilder.build());
mMixes.add(mixBuilder.build());
}
}
/** @hide */
public static final Parcelable.Creator CREATOR
= new Parcelable.Creator() {
/**
* Rebuilds an AudioPolicyConfig previously stored with writeToParcel().
* @param p Parcel object to read the AudioPolicyConfig from
* @return a new AudioPolicyConfig created from the data in the parcel
*/
public AudioPolicyConfig createFromParcel(Parcel p) {
return new AudioPolicyConfig(p);
}
public AudioPolicyConfig[] newArray(int size) {
return new AudioPolicyConfig[size];
}
};
/** @hide */
@Override
public String toString () {
String textDump = new String("android.media.audiopolicy.AudioPolicyConfig:\n");
textDump += mMixes.size() + " AudioMix:\n";
for(AudioMix mix : mMixes) {
// write mix route flags
textDump += "* route flags=0x" + Integer.toHexString(mix.getRouteFlags()) + "\n";
// write mix format
textDump += " rate=" + mix.getFormat().getSampleRate() + "Hz\n";
textDump += " encoding=" + mix.getFormat().getEncoding() + "\n";
textDump += " channels=0x";
textDump += Integer.toHexString(mix.getFormat().getChannelMask()).toUpperCase() +"\n";
// write mix rules
final ArrayList criteria = mix.getRule().getCriteria();
for (AttributeMatchCriterion criterion : criteria) {
switch(criterion.mRule) {
case AudioMixingRule.RULE_EXCLUDE_ATTRIBUTE_USAGE:
textDump += " exclude usage ";
textDump += criterion.mAttr.usageToString();
break;
case AudioMixingRule.RULE_MATCH_ATTRIBUTE_USAGE:
textDump += " match usage ";
textDump += criterion.mAttr.usageToString();
break;
default:
textDump += "invalid rule!";
}
textDump += "\n";
}
}
return textDump;
}
}