1 files changed, 128 insertions, 0 deletions
diff --git a/src/com/android/tv/tuner/exoplayer/buffer/TrickplayStorageManager.java b/src/com/android/tv/tuner/exoplayer/buffer/TrickplayStorageManager.java
new file mode 100644
index 00000000..258a5cd0
--- /dev/null
+++ b/src/com/android/tv/tuner/exoplayer/buffer/TrickplayStorageManager.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2015 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.tuner.exoplayer.buffer;
+
+import android.content.Context;
+import android.media.MediaFormat;
+import android.os.AsyncTask;
+import android.os.Looper;
+import android.provider.Settings;
+import android.util.Pair;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.SortedMap;
+
+/**
+ * Manages Trickplay storage.
+ */
+public class TrickplayStorageManager implements BufferManager.StorageManager {
+    private static final String BUFFER_DIR = "timeshift";
+
+    // Copied from android.provider.Settings.Global (hidden fields)
+    private static final String
+            SYS_STORAGE_THRESHOLD_PERCENTAGE = "sys_storage_threshold_percentage";
+    private static final String
+            SYS_STORAGE_THRESHOLD_MAX_BYTES = "sys_storage_threshold_max_bytes";
+
+    // Copied from android.os.StorageManager
+    private static final int DEFAULT_THRESHOLD_PERCENTAGE = 10;
+    private static final long DEFAULT_THRESHOLD_MAX_BYTES = 500L * 1024 * 1024;
+
+    private final File mBufferDir;
+    private final long mMaxBufferSize;
+    private final long mStorageBufferBytes;
+
+    private static long getStorageBufferBytes(Context context, File path) {
+        long lowPercentage = Settings.Global.getInt(context.getContentResolver(),
+                SYS_STORAGE_THRESHOLD_PERCENTAGE, DEFAULT_THRESHOLD_PERCENTAGE);
+        long lowBytes = path.getTotalSpace() * lowPercentage / 100;
+        long maxLowBytes = Settings.Global.getLong(context.getContentResolver(),
+                SYS_STORAGE_THRESHOLD_MAX_BYTES, DEFAULT_THRESHOLD_MAX_BYTES);
+        return Math.min(lowBytes, maxLowBytes);
+    }
+
+    public TrickplayStorageManager(Context context, File baseDir, long maxBufferSize) {
+        mBufferDir = new File(baseDir, BUFFER_DIR);
+        mBufferDir.mkdirs();
+        mMaxBufferSize = maxBufferSize;
+        clearStorage();
+        mStorageBufferBytes = getStorageBufferBytes(context, mBufferDir);
+    }
+
+    @Override
+    public void clearStorage() {
+        File files[] = mBufferDir.listFiles();
+        if (files == null || files.length == 0) {
+            return;
+        }
+        if (Looper.myLooper() == Looper.getMainLooper()) {
+            new AsyncTask<Void, Void, Void>() {
+                @Override
+                protected Void doInBackground(Void... params) {
+                    for (File file : files) {
+                        file.delete();
+                    }
+                    return null;
+                }
+            }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+        } else {
+            for (File file : files) {
+                file.delete();
+            }
+        }
+    }
+
+    @Override
+    public File getBufferDir() {
+        return mBufferDir;
+    }
+
+    @Override
+    public boolean isPersistent() {
+        return false;
+    }
+
+    @Override
+    public boolean reachedStorageMax(long bufferSize, long pendingDelete) {
+        return bufferSize - pendingDelete > mMaxBufferSize;
+    }
+
+    @Override
+    public boolean hasEnoughBuffer(long pendingDelete) {
+        return mBufferDir.getUsableSpace() + pendingDelete >= mStorageBufferBytes;
+    }
+
+    @Override
+    public Pair<String, MediaFormat> readTrackInfoFile(boolean isAudio) {
+        return null;
+    }
+
+    @Override
+    public ArrayList<Long> readIndexFile(String trackId) {
+        return null;
+    }
+
+    @Override
+    public void writeTrackInfoFile(String trackId, MediaFormat format, boolean isAudio) {
+    }
+
+    @Override
+    public void writeIndexFile(String trackName, SortedMap<Long, SampleChunk> index) {
+    }
+
+}