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/*
* Copyright (C) 2016 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.tv.util;
import android.os.Environment;
import android.content.Context;
import android.os.StatFs;
import android.os.storage.StorageManager;
import android.os.storage.StorageVolume;
import com.android.tv.common.feature.CommonFeatures;
import java.io.File;
/**
* A utility class for storage usage of DVR recording.
*/
public class DvrTunerStorageUtils {
// STOPSHIP: turn off ALLOW_REMOVABLE_STORAGE. b/30768857
private static final boolean ALLOW_REMOVABLE_STORAGE = true;
private static final long MIN_STORAGE_SIZE_FOR_DVR_IN_BYTES = 50 * 1024 * 1024 * 1024L;
private static final long MIN_FREE_STORAGE_SIZE_FOR_DVR_IN_BYTES = 10 * 1024 * 1024 * 1024L;
private static final String RECORDING_DATA_SUB_PATH = "/recording/";
// Since {@link StorageVolume#getUuid} will return null for internal storage and {@code null}
// should be used for missing storage status, we need the internal storage specifier.
private static final String INTERNAL_STORAGE_UUID = "internal_storage_uuid";
/**
* Returns the path to DVR recording data directory.
* @param context {@link Context}
* @param recordingId unique {@link String} specifier for each recording
* @return {@link File}
*/
public static File getRecordingDataDirectory(Context context, String recordingId) {
File recordingDataRootDir = getRootDirectory(context);
if (recordingDataRootDir == null) {
return null;
}
return new File(recordingDataRootDir + RECORDING_DATA_SUB_PATH + recordingId);
}
/**
* Returns the unique identifier for the storage which will be used to store recordings.
* @param context {@link Context}
* @return {@link String} of the unique identifier when storage exists, {@code null} otherwise
*/
public static String getRecordingStorageUuid(Context context) {
File recordingDataRootDir = getRootDirectory(context);
StorageManager manager = (StorageManager) context.getSystemService(context.STORAGE_SERVICE);
StorageVolume volume = manager.getStorageVolume(recordingDataRootDir);
if (volume == null) {
return null;
}
if (!Environment.MEDIA_MOUNTED.equals(volume.getState())) {
return null;
}
String uuid = volume.getUuid();
return uuid == null ? INTERNAL_STORAGE_UUID : uuid;
}
/**
* Returns whether the storage has sufficient storage.
* @param context {@link Context}
* @return {@code true} when there is sufficient storage, {@code false} otherwise
*/
public static boolean isStorageSufficient(Context context) {
File recordingDataRootDir = getRootDirectory(context);
if (recordingDataRootDir == null || !recordingDataRootDir.isDirectory()) {
return false;
}
if (CommonFeatures.FORCE_RECORDING_UNTIL_NO_SPACE.isEnabled(context)) {
return true;
}
StatFs statFs = new StatFs(recordingDataRootDir.toString());
return statFs.getTotalBytes() >= MIN_STORAGE_SIZE_FOR_DVR_IN_BYTES
&& statFs.getAvailableBytes() >= MIN_FREE_STORAGE_SIZE_FOR_DVR_IN_BYTES;
}
private static File getRootDirectory(Context context) {
if (!ALLOW_REMOVABLE_STORAGE) {
return context.getExternalFilesDir(null);
}
File[] dirs = context.getExternalFilesDirs(null);
if (dirs == null) {
return null;
}
for (File dir : dirs) {
if (dir == null) {
continue;
}
StatFs statFs = new StatFs(dir.toString());
if (statFs.getTotalBytes() >= MIN_STORAGE_SIZE_FOR_DVR_IN_BYTES
&& statFs.getAvailableBytes() >= MIN_FREE_STORAGE_SIZE_FOR_DVR_IN_BYTES) {
return dir;
}
}
return dirs[0];
}
}
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