261 lines
9.2 KiB
Java
261 lines
9.2 KiB
Java
/* Copyright 2017 Andrew Dawson
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.util;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.Cursor;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Matrix;
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import android.media.MediaMetadataRetriever;
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import android.media.ThumbnailUtils;
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import android.net.Uri;
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import android.provider.OpenableColumns;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.annotation.Px;
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import android.support.media.ExifInterface;
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import android.util.Log;
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import java.io.ByteArrayOutputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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/**
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* Class with helper methods for obtaining and resizing media files
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*/
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public class MediaUtils {
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private static final String TAG = "MediaUtils";
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public static final int MEDIA_SIZE_UNKNOWN = -1;
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/**
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* Copies the entire contents of the given stream into a byte array and returns it. Beware of
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* OutOfMemoryError for streams of unknown size.
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*/
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@Nullable
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public static byte[] inputStreamGetBytes(InputStream stream) {
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ByteArrayOutputStream buffer = new ByteArrayOutputStream();
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int read;
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byte[] data = new byte[16384];
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try {
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while ((read = stream.read(data, 0, data.length)) != -1) {
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buffer.write(data, 0, read);
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}
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buffer.flush();
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} catch (IOException e) {
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return null;
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}
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return buffer.toByteArray();
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}
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/**
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* Fetches the size of the media represented by the given URI, assuming it is openable and
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* the ContentResolver is able to resolve it.
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*
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* @return the size of the media in bytes or {@link MediaUtils#MEDIA_SIZE_UNKNOWN}
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*/
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public static long getMediaSize(@NonNull ContentResolver contentResolver, @Nullable Uri uri) {
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if(uri == null) return MEDIA_SIZE_UNKNOWN;
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long mediaSize;
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Cursor cursor;
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try {
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cursor = contentResolver.query(uri, null, null, null, null);
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} catch (SecurityException e) {
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return MEDIA_SIZE_UNKNOWN;
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}
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if (cursor != null) {
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int sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE);
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cursor.moveToFirst();
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mediaSize = cursor.getLong(sizeIndex);
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cursor.close();
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} else {
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mediaSize = MEDIA_SIZE_UNKNOWN;
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}
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return mediaSize;
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}
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@Nullable
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public static Bitmap getSampledBitmap(ContentResolver contentResolver, Uri uri, @Px int reqWidth, @Px int reqHeight) {
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// First decode with inJustDecodeBounds=true to check dimensions
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final BitmapFactory.Options options = new BitmapFactory.Options();
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options.inJustDecodeBounds = true;
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InputStream stream;
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try {
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stream = contentResolver.openInputStream(uri);
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} catch (FileNotFoundException e) {
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Log.w(TAG, e);
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return null;
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}
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BitmapFactory.decodeStream(stream, null, options);
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IOUtils.closeQuietly(stream);
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// Calculate inSampleSize
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options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
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// Decode bitmap with inSampleSize set
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options.inJustDecodeBounds = false;
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try {
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stream = contentResolver.openInputStream(uri);
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Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);
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int orientation = getImageOrientation(uri, contentResolver);
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return reorientBitmap(bitmap, orientation);
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} catch (FileNotFoundException e) {
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Log.w(TAG, e);
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return null;
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} catch (OutOfMemoryError e) {
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Log.e(TAG, "OutOfMemoryError while trying to get sampled Bitmap", e);
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return null;
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} finally {
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IOUtils.closeQuietly(stream);
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}
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}
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@Nullable
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public static Bitmap getImageThumbnail(ContentResolver contentResolver, Uri uri, @Px int thumbnailSize) {
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Bitmap source = getSampledBitmap(contentResolver, uri, thumbnailSize, thumbnailSize);
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if(source == null) {
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return null;
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}
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return ThumbnailUtils.extractThumbnail(source, thumbnailSize, thumbnailSize, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
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}
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@Nullable
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public static Bitmap getVideoThumbnail(Context context, Uri uri, @Px int thumbnailSize) {
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MediaMetadataRetriever retriever = new MediaMetadataRetriever();
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retriever.setDataSource(context, uri);
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Bitmap source = retriever.getFrameAtTime();
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if (source == null) {
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return null;
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}
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return ThumbnailUtils.extractThumbnail(source, thumbnailSize, thumbnailSize, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
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}
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public static long getImageSquarePixels(ContentResolver contentResolver, Uri uri) throws FileNotFoundException {
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InputStream input = contentResolver.openInputStream(uri);
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final BitmapFactory.Options options = new BitmapFactory.Options();
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options.inJustDecodeBounds = true;
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BitmapFactory.decodeStream(input, null, options);
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IOUtils.closeQuietly(input);
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return (long) options.outWidth * options.outHeight;
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}
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public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
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// Raw height and width of image
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final int height = options.outHeight;
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final int width = options.outWidth;
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int inSampleSize = 1;
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if (height > reqHeight || width > reqWidth) {
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final int halfHeight = height / 2;
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final int halfWidth = width / 2;
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// Calculate the largest inSampleSize value that is a power of 2 and keeps both
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// height and width larger than the requested height and width.
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while ((halfHeight / inSampleSize) > reqHeight && (halfWidth / inSampleSize) > reqWidth) {
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inSampleSize *= 2;
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}
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}
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return inSampleSize;
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}
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@Nullable
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public static Bitmap reorientBitmap(Bitmap bitmap, int orientation) {
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Matrix matrix = new Matrix();
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switch (orientation) {
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default:
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case ExifInterface.ORIENTATION_NORMAL: {
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return bitmap;
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}
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case ExifInterface.ORIENTATION_FLIP_HORIZONTAL: {
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matrix.setScale(-1, 1);
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break;
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}
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case ExifInterface.ORIENTATION_ROTATE_180: {
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matrix.setRotate(180);
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break;
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}
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case ExifInterface.ORIENTATION_FLIP_VERTICAL: {
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matrix.setRotate(180);
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matrix.postScale(-1, 1);
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break;
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}
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case ExifInterface.ORIENTATION_TRANSPOSE: {
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matrix.setRotate(90);
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matrix.postScale(-1, 1);
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break;
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}
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case ExifInterface.ORIENTATION_ROTATE_90: {
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matrix.setRotate(90);
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break;
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}
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case ExifInterface.ORIENTATION_TRANSVERSE: {
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matrix.setRotate(-90);
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matrix.postScale(-1, 1);
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break;
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}
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case ExifInterface.ORIENTATION_ROTATE_270: {
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matrix.setRotate(-90);
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break;
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}
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}
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try {
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Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
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bitmap.getHeight(), matrix, true);
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if (!bitmap.sameAs(result)) {
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bitmap.recycle();
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}
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return result;
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} catch (OutOfMemoryError e) {
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return null;
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}
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}
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public static int getImageOrientation(Uri uri, ContentResolver contentResolver) {
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InputStream inputStream;
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try {
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inputStream = contentResolver.openInputStream(uri);
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} catch (FileNotFoundException e) {
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Log.w(TAG, e);
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return ExifInterface.ORIENTATION_UNDEFINED;
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}
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if (inputStream == null) {
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return ExifInterface.ORIENTATION_UNDEFINED;
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}
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ExifInterface exifInterface;
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try {
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exifInterface = new ExifInterface(inputStream);
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} catch (IOException e) {
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Log.w(TAG, e);
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IOUtils.closeQuietly(inputStream);
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return ExifInterface.ORIENTATION_UNDEFINED;
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}
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int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION,
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ExifInterface.ORIENTATION_NORMAL);
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IOUtils.closeQuietly(inputStream);
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return orientation;
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}
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}
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