/*
* Copyright (C) 2008 Esmertec AG.
* Copyright (C) 2008 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.mms.ui;
import com.android.mms.model.ImageModel;
import com.android.mms.LogTag;
import com.google.android.mms.ContentType;
import com.google.android.mms.pdu.PduPart;
import android.database.sqlite.SqliteWrapper;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.net.Uri;
import android.provider.MediaStore.Images;
import android.provider.Telephony.Mms.Part;
import android.text.TextUtils;
import android.util.Log;
import android.webkit.MimeTypeMap;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class UriImage {
private static final String TAG = "Mms/image";
private static final boolean DEBUG = false;
private static final boolean LOCAL_LOGV = false;
private final Context mContext;
private final Uri mUri;
private String mContentType;
private String mPath;
private String mSrc;
private int mWidth;
private int mHeight;
public UriImage(Context context, Uri uri) {
if ((null == context) || (null == uri)) {
throw new IllegalArgumentException();
}
String scheme = uri.getScheme();
if (scheme.equals("content")) {
initFromContentUri(context, uri);
} else if (uri.getScheme().equals("file")) {
initFromFile(context, uri);
}
mSrc = mPath.substring(mPath.lastIndexOf('/') + 1);
if(mSrc.startsWith(".") && mSrc.length() > 1) {
mSrc = mSrc.substring(1);
}
// Some MMSCs appear to have problems with filenames
// containing a space. So just replace them with
// underscores in the name, which is typically not
// visible to the user anyway.
mSrc = mSrc.replace(' ', '_');
mContext = context;
mUri = uri;
decodeBoundsInfo();
if (LOCAL_LOGV) {
Log.v(TAG, "UriImage uri: " + uri + " mPath: " + mPath + " mWidth: " + mWidth +
" mHeight: " + mHeight);
}
}
private void initFromFile(Context context, Uri uri) {
mPath = uri.getPath();
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
String extension = MimeTypeMap.getFileExtensionFromUrl(mPath);
if (TextUtils.isEmpty(extension)) {
// getMimeTypeFromExtension() doesn't handle spaces in filenames nor can it handle
// urlEncoded strings. Let's try one last time at finding the extension.
int dotPos = mPath.lastIndexOf('.');
if (0 <= dotPos) {
extension = mPath.substring(dotPos + 1);
}
}
mContentType = mimeTypeMap.getMimeTypeFromExtension(extension);
// It's ok if mContentType is null. Eventually we'll show a toast telling the
// user the picture couldn't be attached.
}
private void initFromContentUri(Context context, Uri uri) {
Cursor c = SqliteWrapper.query(context, context.getContentResolver(),
uri, null, null, null, null);
if (c == null) {
throw new IllegalArgumentException(
"Query on " + uri + " returns null result.");
}
try {
if ((c.getCount() != 1) || !c.moveToFirst()) {
throw new IllegalArgumentException(
"Query on " + uri + " returns 0 or multiple rows.");
}
String filePath;
if (ImageModel.isMmsUri(uri)) {
filePath = c.getString(c.getColumnIndexOrThrow(Part.FILENAME));
if (TextUtils.isEmpty(filePath)) {
filePath = c.getString(
c.getColumnIndexOrThrow(Part._DATA));
}
mContentType = c.getString(
c.getColumnIndexOrThrow(Part.CONTENT_TYPE));
} else {
filePath = uri.getPath();
mContentType = c.getString(
c.getColumnIndexOrThrow(Images.Media.MIME_TYPE));
}
mPath = filePath;
} finally {
c.close();
}
}
private void decodeBoundsInfo() {
InputStream input = null;
try {
input = mContext.getContentResolver().openInputStream(mUri);
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inJustDecodeBounds = true;
BitmapFactory.decodeStream(input, null, opt);
mWidth = opt.outWidth;
mHeight = opt.outHeight;
} catch (FileNotFoundException e) {
// Ignore
Log.e(TAG, "IOException caught while opening stream", e);
} finally {
if (null != input) {
try {
input.close();
} catch (IOException e) {
// Ignore
Log.e(TAG, "IOException caught while closing stream", e);
}
}
}
}
public String getContentType() {
return mContentType;
}
public String getSrc() {
return mSrc;
}
public int getWidth() {
return mWidth;
}
public int getHeight() {
return mHeight;
}
/**
* Get a version of this image resized to fit the given dimension and byte-size limits. Note
* that the content type of the resulting PduPart may not be the same as the content type of
* this UriImage; always call {@link PduPart#getContentType()} to get the new content type.
*
* @param widthLimit The width limit, in pixels
* @param heightLimit The height limit, in pixels
* @param byteLimit The binary size limit, in bytes
* @return A new PduPart containing the resized image data
*/
public PduPart getResizedImageAsPart(int widthLimit, int heightLimit, int byteLimit) {
PduPart part = new PduPart();
byte[] data = getResizedImageData(widthLimit, heightLimit, byteLimit);
if (data == null) {
if (LOCAL_LOGV) {
Log.v(TAG, "Resize image failed.");
}
return null;
}
part.setData(data);
// getResizedImageData ALWAYS compresses to JPEG, regardless of the original content type
part.setContentType(ContentType.IMAGE_JPEG.getBytes());
return part;
}
private static final int NUMBER_OF_RESIZE_ATTEMPTS = 4;
/**
* Resize and recompress the image such that it fits the given limits. The resulting byte
* array contains an image in JPEG format, regardless of the original image's content type.
* @param widthLimit The width limit, in pixels
* @param heightLimit The height limit, in pixels
* @param byteLimit The binary size limit, in bytes
* @return A resized/recompressed version of this image, in JPEG format
*/
private byte[] getResizedImageData(int widthLimit, int heightLimit, int byteLimit) {
int outWidth = mWidth;
int outHeight = mHeight;
float scaleFactor = 1.F;
while ((outWidth * scaleFactor > widthLimit) || (outHeight * scaleFactor > heightLimit)) {
scaleFactor *= .75F;
}
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "getResizedImageData: wlimit=" + widthLimit +
", hlimit=" + heightLimit + ", sizeLimit=" + byteLimit +
", mWidth=" + mWidth + ", mHeight=" + mHeight +
", initialScaleFactor=" + scaleFactor +
", mUri=" + mUri);
}
InputStream input = null;
try {
ByteArrayOutputStream os = null;
int attempts = 1;
int sampleSize = 1;
BitmapFactory.Options options = new BitmapFactory.Options();
int quality = MessageUtils.IMAGE_COMPRESSION_QUALITY;
Bitmap b = null;
// In this loop, attempt to decode the stream with the best possible subsampling (we
// start with 1, which means no subsampling - get the original content) without running
// out of memory.
do {
input = mContext.getContentResolver().openInputStream(mUri);
options.inSampleSize = sampleSize;
try {
b = BitmapFactory.decodeStream(input, null, options);
} catch (OutOfMemoryError e) {
Log.w(TAG, "getResizedImageData: img too large to decode (OutOfMemoryError), " +
"may try with larger sampleSize. Curr sampleSize=" + sampleSize);
sampleSize *= 2; // works best as a power of two
attempts++;
continue;
} finally {
if (input != null) {
try {
input.close();
} catch (IOException e) {
Log.e(TAG, e.getMessage(), e);
}
}
}
} while (b == null && attempts < NUMBER_OF_RESIZE_ATTEMPTS);
if (b == null) {
return null;
}
attempts = 1; // reset count for second loop
// In this loop, we attempt to compress/resize the content to fit the given dimension
// and file-size limits.
do {
try {
if (options.outWidth > widthLimit || options.outHeight > heightLimit ||
(os != null && os.size() > byteLimit)) {
// The decoder does not support the inSampleSize option.
// Scale the bitmap using Bitmap library.
int scaledWidth = (int)(outWidth * scaleFactor);
int scaledHeight = (int)(outHeight * scaleFactor);
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "getResizedImageData: retry scaling using " +
"Bitmap.createScaledBitmap: w=" + scaledWidth +
", h=" + scaledHeight);
}
b = Bitmap.createScaledBitmap(b, scaledWidth, scaledHeight, false);
if (b == null) {
return null;
}
}
// Compress the image into a JPG. Start with MessageUtils.IMAGE_COMPRESSION_QUALITY.
// In case that the image byte size is still too large reduce the quality in
// proportion to the desired byte size.
os = new ByteArrayOutputStream();
b.compress(CompressFormat.JPEG, quality, os);
int jpgFileSize = os.size();
if (jpgFileSize > byteLimit) {
quality = (quality * byteLimit) / jpgFileSize; // watch for int division!
if (quality < MessageUtils.MINIMUM_IMAGE_COMPRESSION_QUALITY) {
quality = MessageUtils.MINIMUM_IMAGE_COMPRESSION_QUALITY;
}
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "getResizedImageData: compress(2) w/ quality=" + quality);
}
os = new ByteArrayOutputStream();
b.compress(CompressFormat.JPEG, quality, os);
}
} catch (java.lang.OutOfMemoryError e) {
Log.w(TAG, "getResizedImageData - image too big (OutOfMemoryError), will try "
+ " with smaller scale factor, cur scale factor: " + scaleFactor);
// fall through and keep trying with a smaller scale factor.
}
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.v(TAG, "attempt=" + attempts
+ " size=" + (os == null ? 0 : os.size())
+ " width=" + outWidth * scaleFactor
+ " height=" + outHeight * scaleFactor
+ " scaleFactor=" + scaleFactor
+ " quality=" + quality);
}
scaleFactor *= .75F;
attempts++;
} while ((os == null || os.size() > byteLimit) && attempts < NUMBER_OF_RESIZE_ATTEMPTS);
b.recycle(); // done with the bitmap, release the memory
return os == null ? null : os.toByteArray();
} catch (FileNotFoundException e) {
Log.e(TAG, e.getMessage(), e);
return null;
} catch (java.lang.OutOfMemoryError e) {
Log.e(TAG, e.getMessage(), e);
return null;
}
}
}