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/*
* 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.util.HashMap;
import java.util.Map;
/**
* This is the super class for all Overlay classes.
* {@hide}
*/
public abstract class Overlay {
/**
* Instance variables
*/
private final String mUniqueId;
/**
* The overlay owner
*/
private final MediaItem mMediaItem;
/**
* user attributes
*/
private final Map<String, String> mUserAttributes;
protected long mStartTimeMs;
protected long mDurationMs;
/**
* Default constructor
*/
@SuppressWarnings("unused")
private Overlay() {
this(null, null, 0, 0);
}
/**
* Constructor
*
* @param mediaItem The media item owner
* @param overlayId The overlay id
* @param startTimeMs The start time relative to the media item start time
* @param durationMs The duration
*
* @throws IllegalArgumentException if the file type is not PNG or the
* startTimeMs and durationMs are incorrect.
*/
public Overlay(MediaItem mediaItem, String overlayId, long startTimeMs,
long durationMs) {
if (mediaItem == null) {
throw new IllegalArgumentException("Media item cannot be null");
}
if ((startTimeMs<0) || (durationMs<0) ) {
throw new IllegalArgumentException("Invalid start time and/OR duration");
}
if (startTimeMs + durationMs > mediaItem.getDuration()) {
throw new IllegalArgumentException("Invalid start time and duration");
}
mMediaItem = mediaItem;
mUniqueId = overlayId;
mStartTimeMs = startTimeMs;
mDurationMs = durationMs;
mUserAttributes = new HashMap<String, String>();
}
/**
* Get the overlay ID.
*
* @return The of the overlay
*/
public String getId() {
return mUniqueId;
}
/**
* Get the duration of overlay.
*
* @return The duration of the overlay effect
*/
public long getDuration() {
return mDurationMs;
}
/**
* If a preview or export is in progress, then this change is effective for
* next preview or export session.
*
* @param durationMs The duration in milliseconds
*/
public void setDuration(long durationMs) {
if (durationMs < 0) {
throw new IllegalArgumentException("Invalid duration");
}
if (mStartTimeMs + durationMs > mMediaItem.getDuration()) {
throw new IllegalArgumentException("Duration is too large");
}
getMediaItem().getNativeContext().setGeneratePreview(true);
final long oldDurationMs = mDurationMs;
mDurationMs = durationMs;
mMediaItem.invalidateTransitions(mStartTimeMs, oldDurationMs, mStartTimeMs, mDurationMs);
}
/**
* Get the start time of overlay.
*
* @return the start time of the overlay
*/
public long getStartTime() {
return mStartTimeMs;
}
/**
* Set the start time for the overlay. If a preview or export is in
* progress, then this change is effective for next preview or export
* session.
*
* @param startTimeMs start time in milliseconds
*/
public void setStartTime(long startTimeMs) {
if (startTimeMs + mDurationMs > mMediaItem.getDuration()) {
throw new IllegalArgumentException("Start time is too large");
}
getMediaItem().getNativeContext().setGeneratePreview(true);
final long oldStartTimeMs = mStartTimeMs;
mStartTimeMs = startTimeMs;
mMediaItem.invalidateTransitions(oldStartTimeMs, mDurationMs, mStartTimeMs, mDurationMs);
}
/**
* Set the start time and duration
*
* @param startTimeMs start time in milliseconds
* @param durationMs The duration in milliseconds
*/
public void setStartTimeAndDuration(long startTimeMs, long durationMs) {
if (startTimeMs + durationMs > mMediaItem.getDuration()) {
throw new IllegalArgumentException("Invalid start time or duration");
}
getMediaItem().getNativeContext().setGeneratePreview(true);
final long oldStartTimeMs = mStartTimeMs;
final long oldDurationMs = mDurationMs;
mStartTimeMs = startTimeMs;
mDurationMs = durationMs;
mMediaItem.invalidateTransitions(oldStartTimeMs, oldDurationMs, mStartTimeMs, mDurationMs);
}
/**
* Get the media item owner.
*
* @return The media item owner.
*/
public MediaItem getMediaItem() {
return mMediaItem;
}
/**
* Set a user attribute
*
* @param name The attribute name
* @param value The attribute value
*/
public void setUserAttribute(String name, String value) {
mUserAttributes.put(name, value);
}
/**
* Get the current user attributes set.
*
* @return The user attributes
*/
public Map<String, String> getUserAttributes() {
return mUserAttributes;
}
/*
* {@inheritDoc}
*/
@Override
public boolean equals(Object object) {
if (!(object instanceof Overlay)) {
return false;
}
return mUniqueId.equals(((Overlay)object).mUniqueId);
}
/*
* {@inheritDoc}
*/
@Override
public int hashCode() {
return mUniqueId.hashCode();
}
}
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