/*
* 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.model;
import com.android.mms.UnsupportContentTypeException;
import com.android.mms.LogTag;
import com.android.mms.MmsConfig;
import android.drm.mobile1.DrmException;
import com.android.mms.drm.DrmWrapper;
import com.google.android.mms.ContentType;
import com.google.android.mms.MmsException;
import com.google.android.mms.pdu.CharacterSets;
import com.google.android.mms.pdu.PduBody;
import com.google.android.mms.pdu.PduPart;
import org.w3c.dom.smil.SMILMediaElement;
import org.w3c.dom.smil.SMILRegionElement;
import org.w3c.dom.smil.SMILRegionMediaElement;
import org.w3c.dom.smil.Time;
import org.w3c.dom.smil.TimeList;
import android.content.Context;
import android.util.Log;
import java.io.IOException;
public class MediaModelFactory {
private static final String TAG = "Mms:media";
public static MediaModel getMediaModel(Context context,
SMILMediaElement sme, LayoutModel layouts, PduBody pb)
throws DrmException, IOException, IllegalArgumentException, MmsException {
String tag = sme.getTagName();
String src = sme.getSrc();
PduPart part = findPart(pb, src);
if (sme instanceof SMILRegionMediaElement) {
return getRegionMediaModel(
context, tag, src, (SMILRegionMediaElement) sme, layouts, part);
} else {
return getGenericMediaModel(
context, tag, src, sme, part, null);
}
}
private static PduPart findPart(PduBody pb, String src) {
PduPart part = null;
if (src != null) {
src = unescapeXML(src);
if (src.startsWith("cid:")) {
part = pb.getPartByContentId("<" + src.substring("cid:".length()) + ">");
} else {
part = pb.getPartByName(src);
if (part == null) {
part = pb.getPartByFileName(src);
if (part == null) {
part = pb.getPartByContentLocation(src);
}
}
}
}
if (part != null) {
return part;
}
throw new IllegalArgumentException("No part found for the model.");
}
private static String unescapeXML(String str) {
return str.replaceAll("<","<")
.replaceAll(">", ">")
.replaceAll(""","\"")
.replaceAll("'","'")
.replaceAll("&", "&");
}
private static MediaModel getRegionMediaModel(Context context,
String tag, String src, SMILRegionMediaElement srme,
LayoutModel layouts, PduPart part) throws DrmException, IOException, MmsException {
SMILRegionElement sre = srme.getRegion();
if (sre != null) {
RegionModel region = layouts.findRegionById(sre.getId());
if (region != null) {
return getGenericMediaModel(context, tag, src, srme, part, region);
}
} else {
String rId = null;
if (tag.equals(SmilHelper.ELEMENT_TAG_TEXT)) {
rId = LayoutModel.TEXT_REGION_ID;
} else {
rId = LayoutModel.IMAGE_REGION_ID;
}
RegionModel region = layouts.findRegionById(rId);
if (region != null) {
return getGenericMediaModel(context, tag, src, srme, part, region);
}
}
throw new IllegalArgumentException("Region not found or bad region ID.");
}
// When we encounter a content type we can't handle, such as "application/vnd.smaf", instead
// of throwing an exception and crashing, insert an empty TextModel in its place.
private static MediaModel createEmptyTextModel(Context context, DrmWrapper wrapper,
RegionModel regionModel) throws IOException {
return wrapper != null ?
new TextModel(context, ContentType.TEXT_PLAIN, null, CharacterSets.ANY_CHARSET,
wrapper, regionModel) :
new TextModel(context, ContentType.TEXT_PLAIN, null, regionModel);
}
private static MediaModel getGenericMediaModel(Context context,
String tag, String src, SMILMediaElement sme, PduPart part,
RegionModel regionModel) throws DrmException, IOException, MmsException {
byte[] bytes = part.getContentType();
if (bytes == null) {
throw new IllegalArgumentException(
"Content-Type of the part may not be null.");
}
String contentType = new String(bytes);
MediaModel media = null;
if (ContentType.isDrmType(contentType)) {
DrmWrapper wrapper = new DrmWrapper(
contentType, part.getDataUri(), part.getData());
if (tag.equals(SmilHelper.ELEMENT_TAG_TEXT)) {
media = new TextModel(context, contentType, src,
part.getCharset(), wrapper, regionModel);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_IMAGE)) {
media = new ImageModel(context, contentType, src,
wrapper, regionModel);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_VIDEO)) {
media = new VideoModel(context, contentType, src,
wrapper, regionModel);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_AUDIO)) {
media = new AudioModel(context, contentType, src,
wrapper);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_REF)) {
String drmContentType = wrapper.getContentType();
if (ContentType.isTextType(drmContentType)) {
media = new TextModel(context, contentType, src,
part.getCharset(), wrapper, regionModel);
} else if (ContentType.isImageType(drmContentType)) {
media = new ImageModel(context, contentType, src,
wrapper, regionModel);
} else if (ContentType.isVideoType(drmContentType)) {
media = new VideoModel(context, contentType, src,
wrapper, regionModel);
} else if (ContentType.isAudioType(drmContentType)) {
media = new AudioModel(context, contentType, src,
wrapper);
} else {
Log.d(TAG, "[MediaModelFactory] getGenericMediaModel Unsupported Content-Type: "
+ contentType);
media = createEmptyTextModel(context, wrapper, regionModel);
}
} else {
throw new IllegalArgumentException("Unsupported TAG: " + tag);
}
} else {
if (tag.equals(SmilHelper.ELEMENT_TAG_TEXT)) {
media = new TextModel(context, contentType, src,
part.getCharset(), part.getData(), regionModel);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_IMAGE)) {
media = new ImageModel(context, contentType, src,
part.getDataUri(), regionModel);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_VIDEO)) {
media = new VideoModel(context, contentType, src,
part.getDataUri(), regionModel);
} else if (tag.equals(SmilHelper.ELEMENT_TAG_AUDIO)) {
media = new AudioModel(context, contentType, src,
part.getDataUri());
} else if (tag.equals(SmilHelper.ELEMENT_TAG_REF)) {
if (ContentType.isTextType(contentType)) {
media = new TextModel(context, contentType, src,
part.getCharset(), part.getData(), regionModel);
} else if (ContentType.isImageType(contentType)) {
media = new ImageModel(context, contentType, src,
part.getDataUri(), regionModel);
} else if (ContentType.isVideoType(contentType)) {
media = new VideoModel(context, contentType, src,
part.getDataUri(), regionModel);
} else if (ContentType.isAudioType(contentType)) {
media = new AudioModel(context, contentType, src,
part.getDataUri());
} else {
Log.d(TAG, "[MediaModelFactory] getGenericMediaModel Unsupported Content-Type: "
+ contentType);
media = createEmptyTextModel(context, null, regionModel);
}
} else {
throw new IllegalArgumentException("Unsupported TAG: " + tag);
}
}
// Set 'begin' property.
int begin = 0;
TimeList tl = sme.getBegin();
if ((tl != null) && (tl.getLength() > 0)) {
// We only support a single begin value.
Time t = tl.item(0);
begin = (int) (t.getResolvedOffset() * 1000);
}
media.setBegin(begin);
// Set 'duration' property.
int duration = (int) (sme.getDur() * 1000);
if (duration <= 0) {
tl = sme.getEnd();
if ((tl != null) && (tl.getLength() > 0)) {
// We only support a single end value.
Time t = tl.item(0);
if (t.getTimeType() != Time.SMIL_TIME_INDEFINITE) {
duration = (int) (t.getResolvedOffset() * 1000) - begin;
if (duration == 0 &&
(media instanceof AudioModel || media instanceof VideoModel)) {
duration = MmsConfig.getMinimumSlideElementDuration();
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
Log.d(TAG, "[MediaModelFactory] compute new duration for " + tag +
", duration=" + duration);
}
}
}
}
}
media.setDuration(duration);
if (!MmsConfig.getSlideDurationEnabled()) {
/**
* Because The slide duration is not supported by mmsc,
* the device has to set fill type as FILL_FREEZE.
* If not, the media will disappear while rotating the screen
* in the slide show play view.
*/
media.setFill(sme.FILL_FREEZE);
} else {
// Set 'fill' property.
media.setFill(sme.getFill());
}
return media;
}
}