Add initial implementation of MediaCache. (49508252) · Commits · e / os / android_packages_apps_Gallery2

src/com/android/gallery3d/app/GalleryAppImpl.java

+2 −3

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		@@ -17,12 +17,9 @@
		package com.android.gallery3d.app;

		import android.app.Application;
		import android.content.ComponentName;
		import android.content.Context;
		import android.content.pm.PackageManager;
		import android.os.AsyncTask;

		import com.android.gallery3d.common.ApiHelper;
		import com.android.gallery3d.data.DataManager;
		import com.android.gallery3d.data.DownloadCache;
		import com.android.gallery3d.data.ImageCacheService;
		@@ -32,6 +29,7 @@ import com.android.gallery3d.util.GalleryUtils;
		import com.android.gallery3d.util.LightCycleHelper;
		import com.android.gallery3d.util.ThreadPool;
		import com.android.gallery3d.util.UsageStatistics;
		import com.android.photos.data.MediaCache;

		import java.io.File;

		@@ -56,6 +54,7 @@ public class GalleryAppImpl extends Application implements GalleryApp {
		WidgetUtils.initialize(this);
		PicasaSource.initialize(this);
		UsageStatistics.initialize(this);
		MediaCache.initialize(this);

		mStitchingProgressManager = LightCycleHelper.createStitchingManagerInstance(this);
		if (mStitchingProgressManager != null) {

src/com/android/photos/data/FileRetriever.java

0 → 100644

+109 −0

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		/*
		* 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.photos.data;

		import android.graphics.Bitmap;
		import android.media.ExifInterface;
		import android.net.Uri;
		import android.util.Log;
		import android.webkit.MimeTypeMap;

		import com.android.gallery3d.common.BitmapUtils;

		import java.io.File;
		import java.io.IOException;

		public class FileRetriever implements MediaRetriever {
		private static final String TAG = FileRetriever.class.getSimpleName();

		@Override
		public File getLocalFile(Uri contentUri) {
		return new File(contentUri.getPath());
		}

		@Override
		public MediaSize getFastImageSize(Uri contentUri, MediaSize size) {
		if (isVideo(contentUri)) {
		return null;
		}
		return MediaSize.TemporaryThumbnail;
		}

		@Override
		public byte[] getTemporaryImage(Uri contentUri, MediaSize fastImageSize) {

		try {
		ExifInterface exif = new ExifInterface(contentUri.getPath());
		if (exif.hasThumbnail()) {
		return exif.getThumbnail();
		}
		} catch (IOException e) {
		Log.w(TAG, "Unable to load exif for " + contentUri);
		}
		return null;
		}

		@Override
		public boolean getMedia(Uri contentUri, MediaSize imageSize, File tempFile) {
		if (imageSize == MediaSize.Original) {
		return false; // getLocalFile should always return the original.
		}
		if (imageSize == MediaSize.Thumbnail) {
		File preview = MediaCache.getInstance().getCachedFile(contentUri, MediaSize.Preview);
		if (preview != null) {
		// Just downsample the preview, it is faster.
		return MediaCacheUtils.downsample(preview, imageSize, tempFile);
		}
		}
		File highRes = new File(contentUri.getPath());
		boolean success;
		if (!isVideo(contentUri)) {
		success = MediaCacheUtils.downsample(highRes, imageSize, tempFile);
		} else {
		// Video needs to extract the bitmap.
		Bitmap bitmap = BitmapUtils.createVideoThumbnail(highRes.getPath());
		if (bitmap == null) {
		return false;
		} else if (imageSize == MediaSize.Thumbnail
		&& !MediaCacheUtils.needsDownsample(bitmap, MediaSize.Preview)
		&& MediaCacheUtils.writeToFile(bitmap, tempFile)) {
		// Opportunistically save preview
		MediaCache mediaCache = MediaCache.getInstance();
		mediaCache.insertIntoCache(contentUri, MediaSize.Preview, tempFile);
		}
		// Now scale the image
		success = MediaCacheUtils.downsample(bitmap, imageSize, tempFile);
		}
		return success;
		}

		@Override
		public Uri normalizeUri(Uri contentUri, MediaSize size) {
		return contentUri;
		}

		@Override
		public MediaSize normalizeMediaSize(Uri contentUri, MediaSize size) {
		return size;
		}

		private static boolean isVideo(Uri uri) {
		MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
		String extension = MimeTypeMap.getFileExtensionFromUrl(uri.toString());
		String mimeType = mimeTypeMap.getMimeTypeFromExtension(extension);
		return (mimeType != null && mimeType.startsWith("video/"));
		}
		}

src/com/android/photos/data/MediaCache.java

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+649 −0

File added.

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src/com/android/photos/data/MediaCacheDatabase.java

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		/*
		* 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.photos.data;

		import android.content.ContentValues;
		import android.content.Context;
		import android.database.Cursor;
		import android.database.sqlite.SQLiteDatabase;
		import android.database.sqlite.SQLiteOpenHelper;
		import android.net.Uri;
		import android.provider.BaseColumns;

		import com.android.photos.data.MediaRetriever.MediaSize;

		import java.io.File;

		class MediaCacheDatabase extends SQLiteOpenHelper {
		public static final int DB_VERSION = 1;
		public static final String DB_NAME = "mediacache.db";

		/** Internal database table used for the media cache */
		public static final String TABLE = "media_cache";

		private static interface Columns extends BaseColumns {
		/** The Content URI of the original image. */
		public static final String URI = "uri";
		/** MediaSize.getValue() values. */
		public static final String MEDIA_SIZE = "media_size";
		/** The last time this image was queried. */
		public static final String LAST_ACCESS = "last_access";
		/** The image size in bytes. */
		public static final String SIZE_IN_BYTES = "size";
		}

		static interface Action {
		void execute(Uri uri, long id, MediaRetriever.MediaSize size, Object parameter);
		}

		private static final String[] PROJECTION_ID = {
		Columns._ID,
		};

		private static final String[] PROJECTION_CACHED = {
		Columns._ID, Columns.MEDIA_SIZE, Columns.SIZE_IN_BYTES,
		};

		private static final String[] PROJECTION_CACHE_SIZE = {
		"SUM(" + Columns.SIZE_IN_BYTES + ")"
		};

		private static final String[] PROJECTION_DELETE_OLD = {
		Columns._ID, Columns.URI, Columns.MEDIA_SIZE, Columns.SIZE_IN_BYTES, Columns.LAST_ACCESS,
		};

		public static final String CREATE_TABLE = "CREATE TABLE " + TABLE + "("
		+ Columns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
		+ Columns.URI + " TEXT NOT NULL,"
		+ Columns.MEDIA_SIZE + " INTEGER NOT NULL,"
		+ Columns.LAST_ACCESS + " INTEGER NOT NULL,"
		+ Columns.SIZE_IN_BYTES + " INTEGER NOT NULL,"
		+ "UNIQUE(" + Columns.URI + ", " + Columns.MEDIA_SIZE + "))";

		public static final String DROP_TABLE = "DROP TABLE IF EXISTS " + TABLE;

		public static final String WHERE_THUMBNAIL = Columns.MEDIA_SIZE + " = "
		+ MediaSize.Thumbnail.getValue();

		public static final String WHERE_NOT_THUMBNAIL = Columns.MEDIA_SIZE + " <> "
		+ MediaSize.Thumbnail.getValue();

		public static final String WHERE_CLEAR_CACHE = Columns.LAST_ACCESS + " <= ?";

		public static final String WHERE_CLEAR_CACHE_LARGE = WHERE_CLEAR_CACHE + " AND "
		+ WHERE_NOT_THUMBNAIL;

		static class QueryCacheResults {
		public QueryCacheResults(long id, int sizeVal) {
		this.id = id;
		this.size = MediaRetriever.MediaSize.fromInteger(sizeVal);
		}
		public long id;
		public MediaRetriever.MediaSize size;
		}

		public MediaCacheDatabase(Context context) {
		super(context, DB_NAME, null, DB_VERSION);
		}

		@Override
		public void onCreate(SQLiteDatabase db) {
		db.execSQL(CREATE_TABLE);
		}

		@Override
		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		db.execSQL(DROP_TABLE);
		onCreate(db);
		MediaCache.getInstance().clearCacheDir();
		}

		public Long getCached(Uri uri, MediaRetriever.MediaSize size) {
		String where = Columns.URI + " = ? AND " + Columns.MEDIA_SIZE + " = ?";
		SQLiteDatabase db = getWritableDatabase();
		String[] whereArgs = {
		uri.toString(), String.valueOf(size.getValue()),
		};
		Cursor cursor = db.query(TABLE, PROJECTION_ID, where, whereArgs, null, null, null);
		Long id = null;
		if (cursor.moveToNext()) {
		id = cursor.getLong(0);
		}
		cursor.close();
		if (id != null) {
		String[] updateArgs = {
		id.toString()
		};
		ContentValues values = new ContentValues();
		values.put(Columns.LAST_ACCESS, System.currentTimeMillis());
		db.beginTransaction();
		try {
		db.update(TABLE, values, Columns._ID + " = ?", updateArgs);
		db.setTransactionSuccessful();
		} finally {
		db.endTransaction();
		}
		}
		return id;
		}

		public MediaRetriever.MediaSize executeOnBestCached(Uri uri, MediaRetriever.MediaSize size, Action action) {
		String where = Columns.URI + " = ? AND " + Columns.MEDIA_SIZE + " < ?";
		String orderBy = Columns.MEDIA_SIZE + " DESC";
		SQLiteDatabase db = getReadableDatabase();
		String[] whereArgs = {
		uri.toString(), String.valueOf(size.getValue()),
		};
		Cursor cursor = db.query(TABLE, PROJECTION_CACHED, where, whereArgs, null, null, orderBy);
		MediaRetriever.MediaSize bestSize = null;
		if (cursor.moveToNext()) {
		long id = cursor.getLong(0);
		bestSize = MediaRetriever.MediaSize.fromInteger(cursor.getInt(1));
		long fileSize = cursor.getLong(2);
		action.execute(uri, id, bestSize, fileSize);
		}
		cursor.close();
		return bestSize;
		}

		public long insert(Uri uri, MediaRetriever.MediaSize size, Action action, File tempFile) {
		SQLiteDatabase db = getWritableDatabase();
		db.beginTransaction();
		try {
		ContentValues values = new ContentValues();
		values.put(Columns.LAST_ACCESS, System.currentTimeMillis());
		values.put(Columns.MEDIA_SIZE, size.getValue());
		values.put(Columns.URI, uri.toString());
		values.put(Columns.SIZE_IN_BYTES, tempFile.length());
		long id = db.insert(TABLE, null, values);
		if (id != -1) {
		action.execute(uri, id, size, tempFile);
		db.setTransactionSuccessful();
		}
		return id;
		} finally {
		db.endTransaction();
		}
		}

		public void updateLength(long id, long fileSize) {
		ContentValues values = new ContentValues();
		values.put(Columns.SIZE_IN_BYTES, fileSize);
		String[] whereArgs = {
		String.valueOf(id)
		};
		SQLiteDatabase db = getWritableDatabase();
		db.beginTransaction();
		try {
		db.update(TABLE, values, Columns._ID + " = ?", whereArgs);
		db.setTransactionSuccessful();
		} finally {
		db.endTransaction();
		}
		}

		public void delete(Uri uri, Action action) {
		SQLiteDatabase db = getWritableDatabase();
		String where = Columns.URI + " = ?";
		String[] whereArgs = {
		uri.toString()
		};
		Cursor cursor = db.query(TABLE, PROJECTION_CACHED, where, whereArgs, null, null, null);
		while (cursor.moveToNext()) {
		long id = cursor.getLong(0);
		MediaRetriever.MediaSize size = MediaRetriever.MediaSize.fromInteger(cursor.getInt(1));
		action.execute(uri, id, size, null);
		}
		cursor.close();
		db.beginTransaction();
		try {
		db.delete(TABLE, where, whereArgs);
		db.setTransactionSuccessful();
		} finally {
		db.endTransaction();
		}
		}

		public void deleteOldCached(boolean includeThumbnails, long deleteSize, Action action) {
		String where = includeThumbnails ? null : WHERE_NOT_THUMBNAIL;
		long lastAccess = 0;
		SQLiteDatabase db = getWritableDatabase();
		db.beginTransaction();
		try {
		Cursor cursor = db.query(TABLE, PROJECTION_DELETE_OLD, where, null, null, null,
		Columns.LAST_ACCESS);
		while (cursor.moveToNext()) {
		long id = cursor.getLong(0);
		String uri = cursor.getString(1);
		MediaSize size = MediaSize.fromInteger(cursor.getInt(2));
		long length = cursor.getLong(3);
		long imageLastAccess = cursor.getLong(4);

		if (imageLastAccess != lastAccess && deleteSize < 0) {
		break; // We've deleted enough.
		}
		lastAccess = imageLastAccess;
		action.execute(Uri.parse(uri), id, size, length);
		deleteSize -= length;
		}
		cursor.close();
		String[] whereArgs = {
		String.valueOf(lastAccess),
		};
		String whereDelete = includeThumbnails ? WHERE_CLEAR_CACHE : WHERE_CLEAR_CACHE_LARGE;
		db.delete(TABLE, whereDelete, whereArgs);
		db.setTransactionSuccessful();
		} finally {
		db.endTransaction();
		}
		}

		public long getCacheSize() {
		return getCacheSize(null);
		}

		public long getThumbnailCacheSize() {
		return getCacheSize(WHERE_THUMBNAIL);
		}

		private long getCacheSize(String where) {
		SQLiteDatabase db = getReadableDatabase();
		Cursor cursor = db.query(TABLE, PROJECTION_CACHE_SIZE, where, null, null, null, null);
		long size = -1;
		if (cursor.moveToNext()) {
		size = cursor.getLong(0);
		}
		cursor.close();
		return size;
		}
		}

src/com/android/photos/data/MediaCacheUtils.java

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+139 −0

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		/*
		* 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.photos.data;

		import android.content.Context;
		import android.content.res.Resources;
		import android.graphics.Bitmap;
		import android.graphics.Bitmap.CompressFormat;
		import android.graphics.BitmapFactory;
		import android.util.Log;

		import com.android.gallery3d.R;
		import com.android.gallery3d.common.BitmapUtils;
		import com.android.gallery3d.data.DecodeUtils;
		import com.android.gallery3d.data.MediaItem;
		import com.android.gallery3d.util.ThreadPool.CancelListener;
		import com.android.gallery3d.util.ThreadPool.JobContext;
		import com.android.photos.data.MediaRetriever.MediaSize;

		import java.io.File;
		import java.io.FileOutputStream;
		import java.io.IOException;

		public class MediaCacheUtils {
		private static final String TAG = MediaCacheUtils.class.getSimpleName();
		private static int QUALITY = 80;
		private static final JobContext sJobStub = new JobContext() {

		@Override
		public boolean isCancelled() {
		return false;
		}

		@Override
		public void setCancelListener(CancelListener listener) {
		}

		@Override
		public boolean setMode(int mode) {
		return true;
		}
		};

		private static int mTargetThumbnailSize;
		private static int mTargetPreviewSize;

		public static void initialize(Context context) {
		Resources resources = context.getResources();
		mTargetThumbnailSize = resources.getDimensionPixelSize(R.dimen.size_thumbnail);
		mTargetPreviewSize = resources.getDimensionPixelSize(R.dimen.size_preview);
		}

		public static int getTargetSize(MediaSize size) {
		return (size == MediaSize.Thumbnail) ? mTargetThumbnailSize : mTargetPreviewSize;
		}

		public static boolean downsample(File inBitmap, MediaSize targetSize, File outBitmap) {
		if (MediaSize.Original == targetSize) {
		return false; // MediaCache should use the local path for this.
		}
		int size = getTargetSize(targetSize);
		BitmapFactory.Options options = new BitmapFactory.Options();
		options.inPreferredConfig = Bitmap.Config.ARGB_8888;
		// TODO: remove unnecessary job context from DecodeUtils.
		Bitmap bitmap = DecodeUtils.decodeThumbnail(sJobStub, inBitmap.getPath(), options, size,
		MediaItem.TYPE_THUMBNAIL);
		boolean success = (bitmap != null);
		if (success) {
		success = writeAndRecycle(bitmap, outBitmap);
		}
		return success;
		}

		public static boolean downsample(Bitmap inBitmap, MediaSize size, File outBitmap) {
		if (MediaSize.Original == size) {
		return false; // MediaCache should use the local path for this.
		}
		int targetSize = getTargetSize(size);
		boolean success;
		if (!needsDownsample(inBitmap, size)) {
		success = writeAndRecycle(inBitmap, outBitmap);
		} else {
		float maxDimension = Math.max(inBitmap.getWidth(), inBitmap.getHeight());
		float scale = targetSize / maxDimension;
		int targetWidth = Math.round(scale * inBitmap.getWidth());
		int targetHeight = Math.round(scale * inBitmap.getHeight());
		Bitmap scaled = Bitmap.createScaledBitmap(inBitmap, targetWidth, targetHeight, false);
		success = writeAndRecycle(scaled, outBitmap);
		inBitmap.recycle();
		}
		return success;
		}

		public static boolean extractImageFromVideo(File inVideo, File outBitmap) {
		Bitmap bitmap = BitmapUtils.createVideoThumbnail(inVideo.getPath());
		return writeAndRecycle(bitmap, outBitmap);
		}

		public static boolean needsDownsample(Bitmap bitmap, MediaSize size) {
		if (size == MediaSize.Original) {
		return false;
		}
		int targetSize = getTargetSize(size);
		int maxDimension = Math.max(bitmap.getWidth(), bitmap.getHeight());
		return maxDimension > (targetSize * 4 / 3);
		}

		public static boolean writeAndRecycle(Bitmap bitmap, File outBitmap) {
		boolean success = writeToFile(bitmap, outBitmap);
		bitmap.recycle();
		return success;
		}

		public static boolean writeToFile(Bitmap bitmap, File outBitmap) {
		boolean success = false;
		try {
		FileOutputStream out = new FileOutputStream(outBitmap);
		success = bitmap.compress(CompressFormat.JPEG, QUALITY, out);
		out.close();
		} catch (IOException e) {
		Log.w(TAG, "Couldn't write bitmap to cache", e);
		// success is already false
		}
		return success;
		}
		}