/*
* Copyright 2021 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 androidx.media3.exoplayer.upstream.experimental;
import static androidx.media3.common.util.Assertions.checkNotNull;
import android.content.Context;
import android.os.Handler;
import androidx.annotation.Nullable;
import androidx.media3.common.C;
import androidx.media3.common.util.NetworkTypeObserver;
import androidx.media3.common.util.UnstableApi;
import androidx.media3.common.util.Util;
import androidx.media3.datasource.DataSource;
import androidx.media3.datasource.DataSpec;
import androidx.media3.datasource.TransferListener;
import androidx.media3.exoplayer.upstream.BandwidthMeter;
import androidx.media3.exoplayer.upstream.TimeToFirstByteEstimator;
import com.google.common.base.Ascii;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.HashMap;
import java.util.Map;
/**
* An experimental {@link BandwidthMeter} that estimates bandwidth by listening to data transfers.
*
* <p>The initial estimate is based on the current operator's network country code or the locale of
* the user, as well as the network connection type. This can be configured in the {@link Builder}.
*/
@UnstableApi
public final class ExperimentalBandwidthMeter implements BandwidthMeter, TransferListener {
/** Default initial Wifi bitrate estimate in bits per second. */
public static final ImmutableList<Long> DEFAULT_INITIAL_BITRATE_ESTIMATES_WIFI =
ImmutableList.of(4_400_000L, 3_200_000L, 2_300_000L, 1_600_000L, 810_000L);
/** Default initial 2G bitrate estimates in bits per second. */
public static final ImmutableList<Long> DEFAULT_INITIAL_BITRATE_ESTIMATES_2G =
ImmutableList.of(1_400_000L, 990_000L, 730_000L, 510_000L, 230_000L);
/** Default initial 3G bitrate estimates in bits per second. */
public static final ImmutableList<Long> DEFAULT_INITIAL_BITRATE_ESTIMATES_3G =
ImmutableList.of(2_100_000L, 1_400_000L, 1_000_000L, 890_000L, 640_000L);
/** Default initial 4G bitrate estimates in bits per second. */
public static final ImmutableList<Long> DEFAULT_INITIAL_BITRATE_ESTIMATES_4G =
ImmutableList.of(2_600_000L, 1_700_000L, 1_300_000L, 1_000_000L, 700_000L);
/** Default initial 5G-NSA bitrate estimates in bits per second. */
public static final ImmutableList<Long> DEFAULT_INITIAL_BITRATE_ESTIMATES_5G_NSA =
ImmutableList.of(5_700_000L, 3_700_000L, 2_300_000L, 1_700_000L, 990_000L);
/** Default initial 5G-SA bitrate estimates in bits per second. */
public static final ImmutableList<Long> DEFAULT_INITIAL_BITRATE_ESTIMATES_5G_SA =
ImmutableList.of(2_800_000L, 1_800_000L, 1_400_000L, 1_100_000L, 870_000L);
/**
* Default number of samples to keep in the sliding window for estimating the time to first byte.
*/
public static final int DEFAULT_TIME_TO_FIRST_BYTE_SAMPLES = 20;
/** Default percentile for estimating the time to first byte. */
public static final float DEFAULT_TIME_TO_FIRST_BYTE_PERCENTILE = 0.5f;
/**
* Default initial bitrate estimate used when the device is offline or the network type cannot be
* determined, in bits per second.
*/
public static final long DEFAULT_INITIAL_BITRATE_ESTIMATE = 1_000_000;
/**
* Index for the Wifi group index in the array returned by {@link
* #getInitialBitrateCountryGroupAssignment}.
*/
private static final int COUNTRY_GROUP_INDEX_WIFI = 0;
/**
* Index for the 2G group index in the array returned by {@link
* #getInitialBitrateCountryGroupAssignment}.
*/
private static final int COUNTRY_GROUP_INDEX_2G = 1;
/**
* Index for the 3G group index in the array returned by {@link
* #getInitialBitrateCountryGroupAssignment}.
*/
private static final int COUNTRY_GROUP_INDEX_3G = 2;
/**
* Index for the 4G group index in the array returned by {@link
* #getInitialBitrateCountryGroupAssignment}.
*/
private static final int COUNTRY_GROUP_INDEX_4G = 3;
/**
* Index for the 5G-NSA group index in the array returned by {@link
* #getInitialBitrateCountryGroupAssignment}.
*/
private static final int COUNTRY_GROUP_INDEX_5G_NSA = 4;
/**
* Index for the 5G-SA group index in the array returned by {@link
* #getInitialBitrateCountryGroupAssignment}.
*/
private static final int COUNTRY_GROUP_INDEX_5G_SA = 5;
/** Builder for a bandwidth meter. */
public static final class Builder {
private final Context context;
private Map<Integer, Long> initialBitrateEstimates;
private TimeToFirstByteEstimator timeToFirstByteEstimator;
private BandwidthEstimator bandwidthEstimator;
private boolean resetOnNetworkTypeChange;
/**
* Creates a builder with default parameters and without listener.
*
* @param context A context.
*/
public Builder(Context context) {
// Handling of null is for backward compatibility only.
this.context = context.getApplicationContext();
initialBitrateEstimates = getInitialBitrateEstimatesForCountry(Util.getCountryCode(context));
timeToFirstByteEstimator =
new PercentileTimeToFirstByteEstimator(
/* numberOfSamples= */ DEFAULT_TIME_TO_FIRST_BYTE_SAMPLES,
/* percentile= */ DEFAULT_TIME_TO_FIRST_BYTE_PERCENTILE);
bandwidthEstimator = new SplitParallelSampleBandwidthEstimator.Builder().build();
resetOnNetworkTypeChange = true;
}
/**
* Sets the initial bitrate estimate in bits per second that should be assumed when a bandwidth
* estimate is unavailable.
*
* @param initialBitrateEstimate The initial bitrate estimate in bits per second.
* @return This builder.
*/
@CanIgnoreReturnValue
public Builder setInitialBitrateEstimate(long initialBitrateEstimate) {
for (Integer networkType : initialBitrateEstimates.keySet()) {
setInitialBitrateEstimate(networkType, initialBitrateEstimate);
}
return this;
}
/**
* Sets the initial bitrate estimate in bits per second that should be assumed when a bandwidth
* estimate is unavailable and the current network connection is of the specified type.
*
* @param networkType The {@link C.NetworkType} this initial estimate is for.
* @param initialBitrateEstimate The initial bitrate estimate in bits per second.
* @return This builder.
*/
@CanIgnoreReturnValue
public Builder setInitialBitrateEstimate(
@C.NetworkType int networkType, long initialBitrateEstimate) {
initialBitrateEstimates.put(networkType, initialBitrateEstimate);
return this;
}
/**
* Sets the initial bitrate estimates to the default values of the specified country. The
* initial estimates are used when a bandwidth estimate is unavailable.
*
* @param countryCode The ISO 3166-1 alpha-2 country code of the country whose default bitrate
* estimates should be used.
* @return This builder.
*/
@CanIgnoreReturnValue
public Builder setInitialBitrateEstimate(String countryCode) {
initialBitrateEstimates =
getInitialBitrateEstimatesForCountry(Ascii.toUpperCase(countryCode));
return this;
}
/**
* Sets the {@link TimeToFirstByteEstimator} to be used.
*
* <p>Default is {@link PercentileTimeToFirstByteEstimator} with a sliding window size of {@link
* #DEFAULT_TIME_TO_FIRST_BYTE_SAMPLES} that uses a percentile of {@link
* #DEFAULT_TIME_TO_FIRST_BYTE_PERCENTILE}.
*
* @param timeToFirstByteEstimator The {@link TimeToFirstByteEstimator} to be used.
* @return This builder.
*/
@CanIgnoreReturnValue
public Builder setTimeToFirstByteEstimator(TimeToFirstByteEstimator timeToFirstByteEstimator) {
this.timeToFirstByteEstimator = timeToFirstByteEstimator;
return this;
}
/**
* Sets the {@link BandwidthEstimator} used. By default, this is set to a {@link
* SplitParallelSampleBandwidthEstimator} using a {@link
* SlidingWeightedAverageBandwidthStatistic}.
*/
@CanIgnoreReturnValue
public Builder setBandwidthEstimator(BandwidthEstimator bandwidthEstimator) {
this.bandwidthEstimator = bandwidthEstimator;
return this;
}
/**
* Sets whether to reset if the network type changes. The default value is {@code true}.
*
* @param resetOnNetworkTypeChange Whether to reset if the network type changes.
* @return This builder.
*/
@CanIgnoreReturnValue
public Builder setResetOnNetworkTypeChange(boolean resetOnNetworkTypeChange) {
this.resetOnNetworkTypeChange = resetOnNetworkTypeChange;
return this;
}
/**
* Builds the bandwidth meter.
*
* @return A bandwidth meter with the configured properties.
*/
public ExperimentalBandwidthMeter build() {
return new ExperimentalBandwidthMeter(
context,
initialBitrateEstimates,
timeToFirstByteEstimator,
bandwidthEstimator,
resetOnNetworkTypeChange);
}
private static Map<Integer, Long> getInitialBitrateEstimatesForCountry(String countryCode) {
int[] groupIndices = getInitialBitrateCountryGroupAssignment(countryCode);
Map<Integer, Long> result = new HashMap<>(/* initialCapacity= */ 8);
result.put(C.NETWORK_TYPE_UNKNOWN, DEFAULT_INITIAL_BITRATE_ESTIMATE);
result.put(
C.NETWORK_TYPE_WIFI,
DEFAULT_INITIAL_BITRATE_ESTIMATES_WIFI.get(groupIndices[COUNTRY_GROUP_INDEX_WIFI]));
result.put(
C.NETWORK_TYPE_2G,
DEFAULT_INITIAL_BITRATE_ESTIMATES_2G.get(groupIndices[COUNTRY_GROUP_INDEX_2G]));
result.put(
C.NETWORK_TYPE_3G,
DEFAULT_INITIAL_BITRATE_ESTIMATES_3G.get(groupIndices[COUNTRY_GROUP_INDEX_3G]));
result.put(
C.NETWORK_TYPE_4G,
DEFAULT_INITIAL_BITRATE_ESTIMATES_4G.get(groupIndices[COUNTRY_GROUP_INDEX_4G]));
result.put(
C.NETWORK_TYPE_5G_NSA,
DEFAULT_INITIAL_BITRATE_ESTIMATES_5G_NSA.get(groupIndices[COUNTRY_GROUP_INDEX_5G_NSA]));
result.put(
C.NETWORK_TYPE_5G_SA,
DEFAULT_INITIAL_BITRATE_ESTIMATES_5G_SA.get(groupIndices[COUNTRY_GROUP_INDEX_5G_SA]));
// Assume default Wifi speed for Ethernet to prevent using the slower fallback.
result.put(
C.NETWORK_TYPE_ETHERNET,
DEFAULT_INITIAL_BITRATE_ESTIMATES_WIFI.get(groupIndices[COUNTRY_GROUP_INDEX_WIFI]));
return result;
}
}
private final ImmutableMap<Integer, Long> initialBitrateEstimates;
private final TimeToFirstByteEstimator timeToFirstByteEstimator;
private final BandwidthEstimator bandwidthEstimator;
private final boolean resetOnNetworkTypeChange;
private @C.NetworkType int networkType;
private long initialBitrateEstimate;
private boolean networkTypeOverrideSet;
private @C.NetworkType int networkTypeOverride;
private ExperimentalBandwidthMeter(
Context context,
Map<Integer, Long> initialBitrateEstimates,
TimeToFirstByteEstimator timeToFirstByteEstimator,
BandwidthEstimator bandwidthEstimator,
boolean resetOnNetworkTypeChange) {
this.initialBitrateEstimates = ImmutableMap.copyOf(initialBitrateEstimates);
this.timeToFirstByteEstimator = timeToFirstByteEstimator;
this.bandwidthEstimator = bandwidthEstimator;
this.resetOnNetworkTypeChange = resetOnNetworkTypeChange;
NetworkTypeObserver networkTypeObserver = NetworkTypeObserver.getInstance(context);
networkType = networkTypeObserver.getNetworkType();
initialBitrateEstimate = getInitialBitrateEstimateForNetworkType(networkType);
networkTypeObserver.register(/* listener= */ this::onNetworkTypeChanged);
}
/**
* Overrides the network type. Handled in the same way as if the meter had detected a change from
* the current network type to the specified network type internally.
*
* <p>Applications should not normally call this method. It is intended for testing purposes.
*
* @param networkType The overriding network type.
*/
public synchronized void setNetworkTypeOverride(@C.NetworkType int networkType) {
networkTypeOverride = networkType;
networkTypeOverrideSet = true;
onNetworkTypeChanged(networkType);
}
@Override
public synchronized long getBitrateEstimate() {
long bandwidthEstimate = bandwidthEstimator.getBandwidthEstimate();
return bandwidthEstimate != BandwidthEstimator.ESTIMATE_NOT_AVAILABLE
? bandwidthEstimate
: initialBitrateEstimate;
}
@Override
public long getTimeToFirstByteEstimateUs() {
return timeToFirstByteEstimator.getTimeToFirstByteEstimateUs();
}
@Override
public TransferListener getTransferListener() {
return this;
}
@Override
public void addEventListener(Handler eventHandler, EventListener eventListener) {
checkNotNull(eventHandler);
checkNotNull(eventListener);
bandwidthEstimator.addEventListener(eventHandler, eventListener);
}
@Override
public void removeEventListener(EventListener eventListener) {
bandwidthEstimator.removeEventListener(eventListener);
}
@Override
public void onTransferInitializing(DataSource source, DataSpec dataSpec, boolean isNetwork) {
if (!isTransferAtFullNetworkSpeed(dataSpec, isNetwork)) {
return;
}
timeToFirstByteEstimator.onTransferInitializing(dataSpec);
bandwidthEstimator.onTransferInitializing(source);
}
@Override
public synchronized void onTransferStart(
DataSource source, DataSpec dataSpec, boolean isNetwork) {
if (!isTransferAtFullNetworkSpeed(dataSpec, isNetwork)) {
return;
}
timeToFirstByteEstimator.onTransferStart(dataSpec);
bandwidthEstimator.onTransferStart(source);
}
@Override
public synchronized void onBytesTransferred(
DataSource source, DataSpec dataSpec, boolean isNetwork, int bytesTransferred) {
if (!isTransferAtFullNetworkSpeed(dataSpec, isNetwork)) {
return;
}
bandwidthEstimator.onBytesTransferred(source, bytesTransferred);
}
@Override
public synchronized void onTransferEnd(DataSource source, DataSpec dataSpec, boolean isNetwork) {
if (!isTransferAtFullNetworkSpeed(dataSpec, isNetwork)) {
return;
}
bandwidthEstimator.onTransferEnd(source);
}
private synchronized void onNetworkTypeChanged(@C.NetworkType int networkType) {
if (this.networkType != C.NETWORK_TYPE_UNKNOWN && !resetOnNetworkTypeChange) {
// Reset on network change disabled. Ignore all updates except the initial one.
return;
}
if (networkTypeOverrideSet) {
networkType = networkTypeOverride;
}
if (this.networkType == networkType) {
return;
}
this.networkType = networkType;
if (networkType == C.NETWORK_TYPE_OFFLINE
|| networkType == C.NETWORK_TYPE_UNKNOWN
|| networkType == C.NETWORK_TYPE_OTHER) {
// It's better not to reset the bandwidth meter for these network types.
return;
}
// Reset the bitrate estimate and report it, along with any bytes transferred.
this.initialBitrateEstimate = getInitialBitrateEstimateForNetworkType(networkType);
bandwidthEstimator.onNetworkTypeChange(initialBitrateEstimate);
timeToFirstByteEstimator.reset();
}
private long getInitialBitrateEstimateForNetworkType(@C.NetworkType int networkType) {
@Nullable Long initialBitrateEstimate = initialBitrateEstimates.get(networkType);
if (initialBitrateEstimate == null) {
initialBitrateEstimate = initialBitrateEstimates.get(C.NETWORK_TYPE_UNKNOWN);
}
if (initialBitrateEstimate == null) {
initialBitrateEstimate = DEFAULT_INITIAL_BITRATE_ESTIMATE;
}
return initialBitrateEstimate;
}
private static boolean isTransferAtFullNetworkSpeed(DataSpec dataSpec, boolean isNetwork) {
return isNetwork && !dataSpec.isFlagSet(DataSpec.FLAG_MIGHT_NOT_USE_FULL_NETWORK_SPEED);
}
/**
* Returns initial bitrate group assignments for a {@code country}. The initial bitrate is a list
* of indices for [Wifi, 2G, 3G, 4G, 5G_NSA, 5G_SA].
*/
private static int[] getInitialBitrateCountryGroupAssignment(String country) {
switch (country) {
case "AD":
case "CW":
return new int[] {2, 2, 0, 0, 2, 2};
case "AE":
return new int[] {1, 4, 3, 4, 4, 2};
case "AG":
return new int[] {2, 4, 3, 4, 2, 2};
case "AL":
return new int[] {1, 1, 1, 3, 2, 2};
case "AM":
return new int[] {2, 3, 2, 3, 2, 2};
case "AO":
return new int[] {4, 4, 4, 3, 2, 2};
case "AS":
return new int[] {2, 2, 3, 3, 2, 2};
case "AT":
return new int[] {1, 2, 1, 4, 1, 4};
case "AU":
return new int[] {0, 2, 1, 1, 3, 0};
case "BE":
return new int[] {0, 1, 4, 4, 3, 2};
case "BH":
return new int[] {1, 3, 1, 4, 4, 2};
case "BJ":
return new int[] {4, 4, 2, 3, 2, 2};
case "BN":
return new int[] {3, 2, 0, 1, 2, 2};
case "BO":
return new int[] {1, 2, 3, 2, 2, 2};
case "BR":
return new int[] {1, 1, 2, 1, 1, 0};
case "BW":
return new int[] {3, 2, 1, 0, 2, 2};
case "BY":
return new int[] {1, 1, 2, 3, 2, 2};
case "CA":
return new int[] {0, 2, 3, 3, 3, 3};
case "CH":
return new int[] {0, 0, 0, 0, 0, 3};
case "BZ":
case "CK":
return new int[] {2, 2, 2, 1, 2, 2};
case "CL":
return new int[] {1, 1, 2, 1, 3, 2};
case "CM":
return new int[] {4, 3, 3, 4, 2, 2};
case "CN":
return new int[] {2, 0, 4, 3, 3, 1};
case "CO":
return new int[] {2, 3, 4, 2, 2, 2};
case "CR":
return new int[] {2, 4, 4, 4, 2, 2};
case "CV":
return new int[] {2, 3, 0, 1, 2, 2};
case "CZ":
return new int[] {0, 0, 2, 0, 1, 2};
case "DE":
return new int[] {0, 1, 3, 2, 2, 2};
case "DO":
return new int[] {3, 4, 4, 4, 4, 2};
case "AZ":
case "BF":
case "DZ":
return new int[] {3, 3, 4, 4, 2, 2};
case "EC":
return new int[] {1, 3, 2, 1, 2, 2};
case "CI":
case "EG":
return new int[] {3, 4, 3, 3, 2, 2};
case "FI":
return new int[] {0, 0, 0, 2, 0, 2};
case "FJ":
return new int[] {3, 1, 2, 3, 2, 2};
case "FM":
return new int[] {4, 2, 3, 0, 2, 2};
case "AI":
case "BB":
case "BM":
case "BQ":
case "DM":
case "FO":
return new int[] {0, 2, 0, 0, 2, 2};
case "FR":
return new int[] {1, 1, 2, 1, 1, 2};
case "GB":
return new int[] {0, 1, 1, 2, 1, 2};
case "GE":
return new int[] {1, 0, 0, 2, 2, 2};
case "GG":
return new int[] {0, 2, 1, 0, 2, 2};
case "CG":
case "GH":
return new int[] {3, 3, 3, 3, 2, 2};
case "GM":
return new int[] {4, 3, 2, 4, 2, 2};
case "GN":
return new int[] {4, 4, 4, 2, 2, 2};
case "GP":
return new int[] {3, 1, 1, 3, 2, 2};
case "GQ":
return new int[] {4, 4, 3, 3, 2, 2};
case "GT":
return new int[] {2, 2, 2, 1, 1, 2};
case "AW":
case "GU":
return new int[] {1, 2, 4, 4, 2, 2};
case "GW":
return new int[] {4, 4, 2, 2, 2, 2};
case "GY":
return new int[] {3, 0, 1, 1, 2, 2};
case "HK":
return new int[] {0, 1, 1, 3, 2, 0};
case "HN":
return new int[] {3, 3, 2, 2, 2, 2};
case "ID":
return new int[] {3, 1, 1, 2, 3, 2};
case "BA":
case "IE":
return new int[] {1, 1, 1, 1, 2, 2};
case "IL":
return new int[] {1, 2, 2, 3, 4, 2};
case "IM":
return new int[] {0, 2, 0, 1, 2, 2};
case "IN":
return new int[] {1, 1, 2, 1, 2, 1};
case "IR":
return new int[] {4, 2, 3, 3, 4, 2};
case "IS":
return new int[] {0, 0, 1, 0, 0, 2};
case "IT":
return new int[] {0, 0, 1, 1, 1, 2};
case "GI":
case "JE":
return new int[] {1, 2, 0, 1, 2, 2};
case "JM":
return new int[] {2, 4, 2, 1, 2, 2};
case "JO":
return new int[] {2, 0, 1, 1, 2, 2};
case "JP":
return new int[] {0, 3, 3, 3, 4, 4};
case "KE":
return new int[] {3, 2, 2, 1, 2, 2};
case "KH":
return new int[] {1, 0, 4, 2, 2, 2};
case "CU":
case "KI":
return new int[] {4, 2, 4, 3, 2, 2};
case "CD":
case "KM":
return new int[] {4, 3, 3, 2, 2, 2};
case "KR":
return new int[] {0, 2, 2, 4, 4, 4};
case "KW":
return new int[] {1, 0, 1, 0, 0, 2};
case "BD":
case "KZ":
return new int[] {2, 1, 2, 2, 2, 2};
case "LA":
return new int[] {1, 2, 1, 3, 2, 2};
case "BS":
case "LB":
return new int[] {3, 2, 1, 2, 2, 2};
case "LK":
return new int[] {3, 2, 3, 4, 4, 2};
case "LR":
return new int[] {3, 4, 3, 4, 2, 2};
case "LU":
return new int[] {1, 1, 4, 2, 0, 2};
case "CY":
case "HR":
case "LV":
return new int[] {1, 0, 0, 0, 0, 2};
case "MA":
return new int[] {3, 3, 2, 1, 2, 2};
case "MC":
return new int[] {0, 2, 2, 0, 2, 2};
case "MD":
return new int[] {1, 0, 0, 0, 2, 2};
case "ME":
return new int[] {2, 0, 0, 1, 1, 2};
case "MH":
return new int[] {4, 2, 1, 3, 2, 2};
case "MK":
return new int[] {2, 0, 0, 1, 3, 2};
case "MM":
return new int[] {2, 2, 2, 3, 4, 2};
case "MN":
return new int[] {2, 0, 1, 2, 2, 2};
case "MO":
return new int[] {0, 2, 4, 4, 4, 2};
case "KG":
case "MQ":
return new int[] {2, 1, 1, 2, 2, 2};
case "MR":
return new int[] {4, 2, 3, 4, 2, 2};
case "DK":
case "EE":
case "HU":
case "LT":
case "MT":
return new int[] {0, 0, 0, 0, 0, 2};
case "MV":
return new int[] {3, 4, 1, 3, 3, 2};
case "MW":
return new int[] {4, 2, 3, 3, 2, 2};
case "MX":
return new int[] {3, 4, 4, 4, 2, 2};
case "MY":
return new int[] {1, 0, 4, 1, 2, 2};
case "NA":
return new int[] {3, 4, 3, 2, 2, 2};
case "NC":
return new int[] {3, 2, 3, 4, 2, 2};
case "NG":
return new int[] {3, 4, 2, 1, 2, 2};
case "NI":
return new int[] {2, 3, 4, 3, 2, 2};
case "NL":
return new int[] {0, 2, 3, 3, 0, 4};
case "NO":
return new int[] {0, 1, 2, 1, 1, 2};
case "NP":
return new int[] {2, 1, 4, 3, 2, 2};
case "NR":
return new int[] {4, 0, 3, 2, 2, 2};
case "NU":
return new int[] {4, 2, 2, 1, 2, 2};
case "NZ":
return new int[] {1, 0, 2, 2, 4, 2};
case "OM":
return new int[] {2, 3, 1, 3, 4, 2};
case "PA":
return new int[] {2, 3, 3, 3, 2, 2};
case "PE":
return new int[] {1, 2, 4, 4, 3, 2};
case "AF":
case "PG":
return new int[] {4, 3, 3, 3, 2, 2};
case "PH":
return new int[] {2, 1, 3, 2, 2, 0};
case "PL":
return new int[] {2, 1, 2, 2, 4, 2};
case "PR":
return new int[] {2, 0, 2, 0, 2, 1};
case "PS":
return new int[] {3, 4, 1, 4, 2, 2};
case "PT":
return new int[] {1, 0, 0, 0, 1, 2};
case "PW":
return new int[] {2, 2, 4, 2, 2, 2};
case "BL":
case "MF":
case "PY":
return new int[] {1, 2, 2, 2, 2, 2};
case "QA":
return new int[] {1, 4, 4, 4, 4, 2};
case "RE":
return new int[] {1, 2, 2, 3, 1, 2};
case "RO":
return new int[] {0, 0, 1, 2, 1, 2};
case "RS":
return new int[] {2, 0, 0, 0, 2, 2};
case "RU":
return new int[] {1, 0, 0, 0, 3, 3};
case "RW":
return new int[] {3, 3, 1, 0, 2, 2};
case "MU":
case "SA":
return new int[] {3, 1, 1, 2, 2, 2};
case "CF":
case "SB":
return new int[] {4, 2, 4, 2, 2, 2};
case "SC":
return new int[] {4, 3, 1, 1, 2, 2};
case "SD":
return new int[] {4, 3, 4, 2, 2, 2};
case "SE":
return new int[] {0, 1, 1, 1, 0, 2};
case "SG":
return new int[] {2, 3, 3, 3, 3, 3};
case "AQ":
case "ER":
case "SH":
return new int[] {4, 2, 2, 2, 2, 2};
case "BG":
case "ES":
case "GR":
case "SI":
return new int[] {0, 0, 0, 0, 1, 2};
case "IQ":
case "SJ":
return new int[] {3, 2, 2, 2, 2, 2};
case "SK":
return new int[] {1, 1, 1, 1, 3, 2};
case "GF":
case "PK":
case "SL":
return new int[] {3, 2, 3, 3, 2, 2};
case "ET":
case "SN":
return new int[] {4, 4, 3, 2, 2, 2};
case "SO":
return new int[] {3, 2, 2, 4, 4, 2};
case "SR":
return new int[] {2, 4, 3, 0, 2, 2};
case "ST":
return new int[] {2, 2, 1, 2, 2, 2};
case "PF":
case "SV":
return new int[] {2, 3, 3, 1, 2, 2};
case "SZ":
return new int[] {4, 4, 3, 4, 2, 2};
case "TC":
return new int[] {2, 2, 1, 3, 2, 2};
case "GA":
case "TG":
return new int[] {3, 4, 1, 0, 2, 2};
case "TH":
return new int[] {0, 1, 2, 1, 2, 2};
case "DJ":
case "SY":
case "TJ":
return new int[] {4, 3, 4, 4, 2, 2};
case "GL":
case "TK":
return new int[] {2, 2, 2, 4, 2, 2};
case "TL":
return new int[] {4, 2, 4, 4, 2, 2};
case "SS":
case "TM":
return new int[] {4, 2, 2, 3, 2, 2};
case "TR":
return new int[] {1, 0, 0, 1, 3, 2};
case "TT":
return new int[] {1, 4, 0, 0, 2, 2};
case "TW":
return new int[] {0, 2, 0, 0, 0, 0};
case "ML":
case "TZ":
return new int[] {3, 4, 2, 2, 2, 2};
case "UA":
return new int[] {0, 1, 1, 2, 4, 2};
case "LS":
case "UG":
return new int[] {3, 3, 3, 2, 2, 2};
case "US":
return new int[] {1, 1, 4, 1, 3, 1};
case "TN":
case "UY":
return new int[] {2, 1, 1, 1, 2, 2};
case "UZ":
return new int[] {2, 2, 3, 4, 3, 2};
case "AX":
case "CX":
case "LI":
case "MP":
case "MS":
case "PM":
case "SM":
case "VA":
return new int[] {0, 2, 2, 2, 2, 2};
case "GD":
case "KN":
case "KY":
case "LC":
case "SX":
case "VC":
return new int[] {1, 2, 0, 0, 2, 2};
case "VG":
return new int[] {2, 2, 0, 1, 2, 2};
case "VI":
return new int[] {0, 2, 1, 2, 2, 2};
case "VN":
return new int[] {0, 0, 1, 2, 2, 1};
case "VU":
return new int[] {4, 3, 3, 1, 2, 2};
case "IO":
case "TV":
case "WF":
return new int[] {4, 2, 2, 4, 2, 2};
case "BT":
case "MZ":
case "WS":
return new int[] {3, 1, 2, 1, 2, 2};
case "XK":
return new int[] {1, 2, 1, 1, 2, 2};
case "BI":
case "HT":
case "MG":
case "NE":
case "TD":
case "VE":
case "YE":
return new int[] {4, 4, 4, 4, 2, 2};
case "YT":
return new int[] {2, 3, 3, 4, 2, 2};
case "ZA":
return new int[] {2, 3, 2, 1, 2, 2};
case "ZM":
return new int[] {4, 4, 4, 3, 3, 2};
case "LY":
case "TO":
case "ZW":
return new int[] {3, 2, 4, 3, 2, 2};
default:
return new int[] {2, 2, 2, 2, 2, 2};
}
}
}