/* | |
* Copyright (C) 2010 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 android.media.videoeditor; | |
import java.io.File; | |
import java.io.FileNotFoundException; | |
import java.io.FileOutputStream; | |
import java.io.IOException; | |
import android.graphics.Bitmap; | |
import android.graphics.BitmapFactory; | |
import android.graphics.Bitmap.CompressFormat; | |
/** | |
* This class is used to overlay an image on top of a media item. | |
* {@hide} | |
*/ | |
public class OverlayFrame extends Overlay { | |
// Instance variables | |
private Bitmap mBitmap; | |
private String mFilename; | |
/** | |
* An object of this type cannot be instantiated by using the default | |
* constructor | |
*/ | |
@SuppressWarnings("unused") | |
private OverlayFrame() { | |
this(null, null, (String)null, 0, 0); | |
} | |
/** | |
* Constructor for an OverlayFrame | |
* | |
* @param mediaItem The media item owner | |
* @param overlayId The overlay id | |
* @param bitmap The bitmap to be used as an overlay. The size of the | |
* bitmap must equal to the size of the media item to which it is | |
* added. The bitmap is typically a decoded PNG file. | |
* @param startTimeMs The overlay start time in milliseconds | |
* @param durationMs The overlay duration in milliseconds | |
* | |
* @throws IllegalArgumentException if the file type is not PNG or the | |
* startTimeMs and durationMs are incorrect. | |
*/ | |
public OverlayFrame(MediaItem mediaItem, String overlayId, Bitmap bitmap, long startTimeMs, | |
long durationMs) { | |
super(mediaItem, overlayId, startTimeMs, durationMs); | |
mBitmap = bitmap; | |
mFilename = null; | |
} | |
/** | |
* Constructor for an OverlayFrame. This constructor can be used to | |
* restore the overlay after it was saved internally by the video editor. | |
* | |
* @param mediaItem The media item owner | |
* @param overlayId The overlay id | |
* @param filename The file name that contains the overlay. | |
* @param startTimeMs The overlay start time in milliseconds | |
* @param durationMs The overlay duration in milliseconds | |
* | |
* @throws IllegalArgumentException if the file type is not PNG or the | |
* startTimeMs and durationMs are incorrect. | |
*/ | |
OverlayFrame(MediaItem mediaItem, String overlayId, String filename, long startTimeMs, | |
long durationMs) { | |
super(mediaItem, overlayId, startTimeMs, durationMs); | |
mFilename = filename; | |
mBitmap = BitmapFactory.decodeFile(mFilename); | |
} | |
/** | |
* @return Get the overlay bitmap | |
*/ | |
public Bitmap getBitmap() { | |
return mBitmap; | |
} | |
/** | |
* @param bitmap The overlay bitmap | |
*/ | |
public void setBitmap(Bitmap bitmap) { | |
mBitmap = bitmap; | |
if (mFilename != null) { | |
// Delete the file | |
new File(mFilename).delete(); | |
// Invalidate the filename | |
mFilename = null; | |
} | |
// Invalidate the transitions if necessary | |
getMediaItem().invalidateTransitions(this); | |
} | |
/** | |
* Get the file name of this overlay | |
*/ | |
String getFilename() { | |
return mFilename; | |
} | |
/** | |
* Save the overlay to the project folder | |
* | |
* @param path The path where the overlay will be saved | |
* | |
* @return The filename | |
* @throws FileNotFoundException if the bitmap cannot be saved | |
* @throws IOException if the bitmap file cannot be saved | |
*/ | |
String save(String path) throws FileNotFoundException, IOException { | |
if (mFilename != null) { | |
return mFilename; | |
} | |
mFilename = path + "/" + getId() + ".png"; | |
// Save the image to a local file | |
final FileOutputStream out = new FileOutputStream(mFilename); | |
mBitmap.compress(CompressFormat.PNG, 100, out); | |
out.flush(); | |
out.close(); | |
return mFilename; | |
} | |
/** | |
* Delete the overlay file | |
*/ | |
void invalidate() { | |
if (mFilename != null) { | |
new File(mFilename).delete(); | |
} | |
} | |
} |