| /* |
| * Copyright (C) 2013 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.camera.app; |
| |
| import android.app.ActivityManager; |
| import android.content.ComponentCallbacks2; |
| import android.content.Context; |
| import android.content.res.Configuration; |
| |
| import com.android.camera.app.MediaSaver.QueueListener; |
| import com.android.camera.debug.Log; |
| import com.android.camera.util.GservicesHelper; |
| |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| |
| /** |
| * Default implementation of the {@link MemoryManager}. |
| * <p> |
| * TODO: Add GCam signals. |
| */ |
| public class MemoryManagerImpl implements MemoryManager, QueueListener, ComponentCallbacks2 { |
| private static final Log.Tag TAG = new Log.Tag("MemoryManagerImpl"); |
| /** |
| * Let's signal only 70% of max memory is allowed to be used by native code |
| * to allow a buffer for special captures. |
| */ |
| private static final float MAX_MEM_ALLOWED = 0.70f; |
| |
| private static final int[] sCriticalStates = new int[] { |
| ComponentCallbacks2.TRIM_MEMORY_COMPLETE, |
| ComponentCallbacks2.TRIM_MEMORY_RUNNING_CRITICAL |
| }; |
| |
| private final LinkedList<MemoryListener> mListeners = new LinkedList<MemoryListener>(); |
| |
| /** |
| * The maximum amount of memory allowed to be allocated in native code (in |
| * megabytes) |
| */ |
| private final int mMaxAllowedNativeMemory; |
| |
| /** |
| * Used to query a breakdown of current memory consumption and memory |
| * thresholds. |
| */ |
| private final MemoryQuery mMemoryQuery; |
| |
| /** |
| * Use this to create a wired-up memory manager. |
| * |
| * @param context this is used to register for system memory events. |
| * @param mediaSaver this used to check if the saving queue is full. |
| * @return A wired-up memory manager instance. |
| */ |
| public static MemoryManagerImpl create(Context context, MediaSaver mediaSaver) { |
| ActivityManager activityManager = |
| (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); |
| int maxAllowedNativeMemory = getMaxAllowedNativeMemory(context); |
| MemoryQuery mMemoryQuery = new MemoryQuery(activityManager); |
| MemoryManagerImpl memoryManager = new MemoryManagerImpl(maxAllowedNativeMemory, |
| mMemoryQuery); |
| context.registerComponentCallbacks(memoryManager); |
| mediaSaver.setQueueListener(memoryManager); |
| return memoryManager; |
| } |
| |
| /** |
| * Use {@link #create(Context, MediaSaver)} to make sure it's wired up |
| * correctly. |
| */ |
| private MemoryManagerImpl(int maxAllowedNativeMemory, MemoryQuery memoryQuery) { |
| mMaxAllowedNativeMemory = maxAllowedNativeMemory; |
| mMemoryQuery = memoryQuery; |
| Log.d(TAG, "Max native memory: " + mMaxAllowedNativeMemory + " MB"); |
| |
| } |
| |
| @Override |
| public void addListener(MemoryListener listener) { |
| synchronized (mListeners) { |
| if (!mListeners.contains(listener)) { |
| mListeners.add(listener); |
| } else { |
| Log.w(TAG, "Listener already added."); |
| } |
| } |
| } |
| |
| @Override |
| public void removeListener(MemoryListener listener) { |
| synchronized (mListeners) { |
| if (mListeners.contains(listener)) { |
| mListeners.remove(listener); |
| } else { |
| Log.w(TAG, "Cannot remove listener that was never added."); |
| } |
| } |
| } |
| |
| @Override |
| public void onConfigurationChanged(Configuration newConfig) { |
| } |
| |
| @Override |
| public void onLowMemory() { |
| notifyLowMemory(); |
| } |
| |
| @Override |
| public void onTrimMemory(int level) { |
| for (int i = 0; i < sCriticalStates.length; ++i) { |
| if (level == sCriticalStates[i]) { |
| notifyLowMemory(); |
| return; |
| } |
| } |
| } |
| |
| @Override |
| public void onQueueStatus(boolean full) { |
| notifyCaptureStateUpdate(full ? STATE_LOW_MEMORY : STATE_OK); |
| } |
| |
| @Override |
| public int getMaxAllowedNativeMemoryAllocation() { |
| return mMaxAllowedNativeMemory; |
| } |
| |
| @Override |
| public HashMap queryMemory() { |
| return mMemoryQuery.queryMemory(); |
| } |
| |
| /** Helper to determine max allowed native memory allocation (in megabytes). */ |
| private static int getMaxAllowedNativeMemory(Context context) { |
| // First check whether we have a system override. |
| int maxAllowedOverrideMb = GservicesHelper.getMaxAllowedNativeMemoryMb(context); |
| if (maxAllowedOverrideMb > 0) { |
| Log.d(TAG, "Max native memory overridden: " + maxAllowedOverrideMb); |
| return maxAllowedOverrideMb; |
| } |
| |
| ActivityManager activityManager = (ActivityManager) context |
| .getSystemService(Context.ACTIVITY_SERVICE); |
| |
| // Use the max of the regular memory class and the large memory class. |
| // This is defined as the maximum memory allowed to be used by the |
| // Dalvik heap, but it's safe to assume the app can use the same amount |
| // once more in native code. |
| return (int) (Math.max(activityManager.getMemoryClass(), |
| activityManager.getLargeMemoryClass()) * MAX_MEM_ALLOWED); |
| } |
| |
| /** Notify our listener that memory is running low. */ |
| private void notifyLowMemory() { |
| synchronized (mListeners) { |
| for (MemoryListener listener : mListeners) { |
| listener.onLowMemory(); |
| } |
| } |
| } |
| |
| private void notifyCaptureStateUpdate(int captureState) { |
| synchronized (mListeners) { |
| for (MemoryListener listener : mListeners) { |
| listener.onMemoryStateChanged(captureState); |
| } |
| } |
| } |
| } |