diff options
Diffstat (limited to 'src/com/android/photos/data/MediaCacheUtils.java')
| -rw-r--r-- | src/com/android/photos/data/MediaCacheUtils.java | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/com/android/photos/data/MediaCacheUtils.java b/src/com/android/photos/data/MediaCacheUtils.java new file mode 100644 index 000000000..e3ccd1402 --- /dev/null +++ b/src/com/android/photos/data/MediaCacheUtils.java @@ -0,0 +1,167 @@ +/* + * 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 android.util.Pools.SimplePool; +import android.util.Pools.SynchronizedPool; + +import com.android.gallery3d.R; +import com.android.gallery3d.common.BitmapUtils; +import com.android.gallery3d.common.Utils; +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; +import java.io.InputStream; +import java.io.OutputStream; + +public class MediaCacheUtils { + private static final String TAG = MediaCacheUtils.class.getSimpleName(); + private static int QUALITY = 80; + private static final int BUFFER_SIZE = 4096; + private static final SimplePool<byte[]> mBufferPool = new SynchronizedPool<byte[]>(5); + + 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; + } + + public static int copyStream(InputStream in, OutputStream out) throws IOException { + byte[] buffer = mBufferPool.acquire(); + if (buffer == null) { + buffer = new byte[BUFFER_SIZE]; + } + try { + int totalWritten = 0; + int bytesRead; + while ((bytesRead = in.read(buffer)) >= 0) { + out.write(buffer, 0, bytesRead); + totalWritten += bytesRead; + } + return totalWritten; + } finally { + Utils.closeSilently(in); + Utils.closeSilently(out); + mBufferPool.release(buffer); + } + } +} |