| /* |
| * 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.media.MediaFormat; |
| import android.util.Pair; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.SortedMap; |
| |
| /** |
| * Manages DVR storage. |
| */ |
| public class DvrStorageManager implements BufferManager.StorageManager { |
| |
| // TODO: make serializable classes and use protobuf after internal data structure is finalized. |
| private static final String KEY_PIXEL_WIDTH_HEIGHT_RATIO = |
| "com.google.android.videos.pixelWidthHeightRatio"; |
| private static final String META_FILE_SUFFIX = ".meta"; |
| private static final String IDX_FILE_SUFFIX = ".idx"; |
| |
| // Size of minimum reserved storage buffer which will be used to save meta files |
| // and index files after actual recording finished. |
| private static final long MIN_BUFFER_BYTES = 256L * 1024 * 1024; |
| private static final int NO_VALUE = -1; |
| private static final long NO_VALUE_LONG = -1L; |
| |
| private final File mBufferDir; |
| |
| // {@code true} when this is for recording, {@code false} when this is for replaying. |
| private final boolean mIsRecording; |
| |
| public DvrStorageManager(File file, boolean isRecording) { |
| mBufferDir = file; |
| mBufferDir.mkdirs(); |
| mIsRecording = isRecording; |
| } |
| |
| @Override |
| public void clearStorage() { |
| if (mIsRecording) { |
| File[] files = mBufferDir.listFiles(); |
| if (files != null && files.length > 0) { |
| for (File file : files) { |
| file.delete(); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public File getBufferDir() { |
| return mBufferDir; |
| } |
| |
| @Override |
| public boolean isPersistent() { |
| return true; |
| } |
| |
| @Override |
| public boolean reachedStorageMax(long bufferSize, long pendingDelete) { |
| return false; |
| } |
| |
| @Override |
| public boolean hasEnoughBuffer(long pendingDelete) { |
| return !mIsRecording || mBufferDir.getUsableSpace() >= MIN_BUFFER_BYTES; |
| } |
| |
| private void readFormatInt(DataInputStream in, MediaFormat format, String key) |
| throws IOException { |
| int val = in.readInt(); |
| if (val != NO_VALUE) { |
| format.setInteger(key, val); |
| } |
| } |
| |
| private void readFormatLong(DataInputStream in, MediaFormat format, String key) |
| throws IOException { |
| long val = in.readLong(); |
| if (val != NO_VALUE_LONG) { |
| format.setLong(key, val); |
| } |
| } |
| |
| private void readFormatFloat(DataInputStream in, MediaFormat format, String key) |
| throws IOException { |
| float val = in.readFloat(); |
| if (val != NO_VALUE) { |
| format.setFloat(key, val); |
| } |
| } |
| |
| private String readString(DataInputStream in) throws IOException { |
| int len = in.readInt(); |
| if (len <= 0) { |
| return null; |
| } |
| byte [] strBytes = new byte[len]; |
| in.readFully(strBytes); |
| return new String(strBytes, StandardCharsets.UTF_8); |
| } |
| |
| private void readFormatString(DataInputStream in, MediaFormat format, String key) |
| throws IOException { |
| String str = readString(in); |
| if (str != null) { |
| format.setString(key, str); |
| } |
| } |
| |
| private ByteBuffer readByteBuffer(DataInputStream in) throws IOException { |
| int len = in.readInt(); |
| if (len <= 0) { |
| return null; |
| } |
| byte [] bytes = new byte[len]; |
| in.readFully(bytes); |
| ByteBuffer buffer = ByteBuffer.allocate(len); |
| buffer.put(bytes); |
| buffer.flip(); |
| |
| return buffer; |
| } |
| |
| private void readFormatByteBuffer(DataInputStream in, MediaFormat format, String key) |
| throws IOException { |
| ByteBuffer buffer = readByteBuffer(in); |
| if (buffer != null) { |
| format.setByteBuffer(key, buffer); |
| } |
| } |
| |
| @Override |
| public Pair<String, MediaFormat> readTrackInfoFile(boolean isAudio) throws IOException { |
| File file = new File(getBufferDir(), (isAudio ? "audio" : "video") + META_FILE_SUFFIX); |
| try (DataInputStream in = new DataInputStream(new FileInputStream(file))) { |
| String name = readString(in); |
| MediaFormat format = new MediaFormat(); |
| readFormatString(in, format, MediaFormat.KEY_MIME); |
| readFormatInt(in, format, MediaFormat.KEY_MAX_INPUT_SIZE); |
| readFormatInt(in, format, MediaFormat.KEY_WIDTH); |
| readFormatInt(in, format, MediaFormat.KEY_HEIGHT); |
| readFormatInt(in, format, MediaFormat.KEY_CHANNEL_COUNT); |
| readFormatInt(in, format, MediaFormat.KEY_SAMPLE_RATE); |
| readFormatFloat(in, format, KEY_PIXEL_WIDTH_HEIGHT_RATIO); |
| for (int i = 0; i < 3; ++i) { |
| readFormatByteBuffer(in, format, "csd-" + i); |
| } |
| readFormatLong(in, format, MediaFormat.KEY_DURATION); |
| return new Pair<>(name, format); |
| } |
| } |
| |
| @Override |
| public ArrayList<Long> readIndexFile(String trackId) throws IOException { |
| ArrayList<Long> indices = new ArrayList<>(); |
| File file = new File(getBufferDir(), trackId + IDX_FILE_SUFFIX); |
| try (DataInputStream in = new DataInputStream(new FileInputStream(file))) { |
| long count = in.readLong(); |
| for (long i = 0; i < count; ++i) { |
| indices.add(in.readLong()); |
| } |
| return indices; |
| } |
| } |
| |
| private void writeFormatInt(DataOutputStream out, MediaFormat format, String key) |
| throws IOException { |
| if (format.containsKey(key)) { |
| out.writeInt(format.getInteger(key)); |
| } else { |
| out.writeInt(NO_VALUE); |
| } |
| } |
| |
| private void writeFormatLong(DataOutputStream out, MediaFormat format, String key) |
| throws IOException { |
| if (format.containsKey(key)) { |
| out.writeLong(format.getLong(key)); |
| } else { |
| out.writeLong(NO_VALUE_LONG); |
| } |
| } |
| |
| private void writeFormatFloat(DataOutputStream out, MediaFormat format, String key) |
| throws IOException { |
| if (format.containsKey(key)) { |
| out.writeFloat(format.getFloat(key)); |
| } else { |
| out.writeFloat(NO_VALUE); |
| } |
| } |
| |
| private void writeString(DataOutputStream out, String str) throws IOException { |
| byte [] data = str.getBytes(StandardCharsets.UTF_8); |
| out.writeInt(data.length); |
| if (data.length > 0) { |
| out.write(data); |
| } |
| } |
| |
| private void writeFormatString(DataOutputStream out, MediaFormat format, String key) |
| throws IOException { |
| if (format.containsKey(key)) { |
| writeString(out, format.getString(key)); |
| } else { |
| out.writeInt(0); |
| } |
| } |
| |
| private void writeByteBuffer(DataOutputStream out, ByteBuffer buffer) throws IOException { |
| byte [] data = new byte[buffer.limit()]; |
| buffer.get(data); |
| buffer.flip(); |
| out.writeInt(data.length); |
| if (data.length > 0) { |
| out.write(data); |
| } else { |
| out.writeInt(0); |
| } |
| } |
| |
| private void writeFormatByteBuffer(DataOutputStream out, MediaFormat format, String key) |
| throws IOException { |
| if (format.containsKey(key)) { |
| writeByteBuffer(out, format.getByteBuffer(key)); |
| } else { |
| out.writeInt(0); |
| } |
| } |
| |
| @Override |
| public void writeTrackInfoFile(String trackId, MediaFormat format, boolean isAudio) |
| throws IOException { |
| File file = new File(getBufferDir(), (isAudio ? "audio" : "video") + META_FILE_SUFFIX); |
| try (DataOutputStream out = new DataOutputStream(new FileOutputStream(file))) { |
| writeString(out, trackId); |
| writeFormatString(out, format, MediaFormat.KEY_MIME); |
| writeFormatInt(out, format, MediaFormat.KEY_MAX_INPUT_SIZE); |
| writeFormatInt(out, format, MediaFormat.KEY_WIDTH); |
| writeFormatInt(out, format, MediaFormat.KEY_HEIGHT); |
| writeFormatInt(out, format, MediaFormat.KEY_CHANNEL_COUNT); |
| writeFormatInt(out, format, MediaFormat.KEY_SAMPLE_RATE); |
| writeFormatFloat(out, format, KEY_PIXEL_WIDTH_HEIGHT_RATIO); |
| for (int i = 0; i < 3; ++i) { |
| writeFormatByteBuffer(out, format, "csd-" + i); |
| } |
| writeFormatLong(out, format, MediaFormat.KEY_DURATION); |
| } |
| } |
| |
| @Override |
| public void writeIndexFile(String trackName, SortedMap<Long, SampleChunk> index) |
| throws IOException { |
| File indexFile = new File(getBufferDir(), trackName + IDX_FILE_SUFFIX); |
| try (DataOutputStream out = new DataOutputStream(new FileOutputStream(indexFile))) { |
| out.writeLong(index.size()); |
| for (Long key : index.keySet()) { |
| out.writeLong(key); |
| } |
| } |
| } |
| } |