| /* |
| * Copyright 2020 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.android.server.tv.tunerresourcemanager; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * A Cas resource object used by the Tuner Resource Manager to record the cas |
| * information. |
| * |
| * @hide |
| */ |
| public final class CasResource { |
| |
| private final int mSystemId; |
| |
| private int mMaxSessionNum; |
| |
| private int mAvailableSessionNum; |
| |
| /** |
| * The owner clients' ids when part of the Cas is occupied. |
| */ |
| private Map<Integer, Integer> mOwnerClientIdsToSessionNum = new HashMap<>(); |
| |
| private CasResource(Builder builder) { |
| this.mSystemId = builder.mSystemId; |
| this.mMaxSessionNum = builder.mMaxSessionNum; |
| this.mAvailableSessionNum = builder.mMaxSessionNum; |
| } |
| |
| public int getSystemId() { |
| return mSystemId; |
| } |
| |
| public int getMaxSessionNum() { |
| return mMaxSessionNum; |
| } |
| |
| public int getUsedSessionNum() { |
| return (mMaxSessionNum - mAvailableSessionNum); |
| } |
| |
| public boolean isFullyUsed() { |
| return mAvailableSessionNum == 0; |
| } |
| |
| /** |
| * Update max session number. |
| * |
| * @param maxSessionNum the new max session num. |
| */ |
| public void updateMaxSessionNum(int maxSessionNum) { |
| mAvailableSessionNum = Math.max( |
| 0, mAvailableSessionNum + (maxSessionNum - mMaxSessionNum)); |
| mMaxSessionNum = maxSessionNum; |
| } |
| |
| /** |
| * Set an owner for the cas |
| * |
| * @param ownerId the client id of the owner. |
| */ |
| public void setOwner(int ownerId) { |
| int sessionNum = mOwnerClientIdsToSessionNum.get(ownerId) == null |
| ? 1 : (mOwnerClientIdsToSessionNum.get(ownerId) + 1); |
| mOwnerClientIdsToSessionNum.put(ownerId, sessionNum); |
| mAvailableSessionNum--; |
| } |
| |
| /** |
| * Remove an owner of the Cas. |
| * |
| * @param ownerId the removing client id of the owner. |
| */ |
| public void removeOwner(int ownerId) { |
| mAvailableSessionNum += mOwnerClientIdsToSessionNum.get(ownerId); |
| mOwnerClientIdsToSessionNum.remove(ownerId); |
| } |
| |
| public Set<Integer> getOwnerClientIds() { |
| return mOwnerClientIdsToSessionNum.keySet(); |
| } |
| |
| @Override |
| public String toString() { |
| return "CasResource[systemId=" + this.mSystemId |
| + ", isFullyUsed=" + (this.mAvailableSessionNum == 0) |
| + ", maxSessionNum=" + this.mMaxSessionNum |
| + ", ownerClients=" + ownersMapToString() + "]"; |
| } |
| |
| /** |
| * Builder class for {@link CasResource}. |
| */ |
| public static class Builder { |
| |
| private int mSystemId; |
| private int mMaxSessionNum; |
| |
| Builder(int systemId) { |
| this.mSystemId = systemId; |
| } |
| |
| /** |
| * Builder for {@link CasResource}. |
| * |
| * @param maxSessionNum the max session num the current Cas has. |
| */ |
| public Builder maxSessionNum(int maxSessionNum) { |
| this.mMaxSessionNum = maxSessionNum; |
| return this; |
| } |
| |
| /** |
| * Build a {@link CasResource}. |
| * |
| * @return {@link CasResource}. |
| */ |
| public CasResource build() { |
| CasResource cas = new CasResource(this); |
| return cas; |
| } |
| } |
| |
| private String ownersMapToString() { |
| StringBuilder string = new StringBuilder("{"); |
| for (int clienId : mOwnerClientIdsToSessionNum.keySet()) { |
| string.append(" clientId=") |
| .append(clienId) |
| .append(", owns session num=") |
| .append(mOwnerClientIdsToSessionNum.get(clienId)) |
| .append(","); |
| } |
| return string.append("}").toString(); |
| } |
| } |