/* * 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 java.io.IOException; 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 com.android.mms.LogTag; import com.android.mms.MmsConfig; import com.google.android.mms.ContentType; import com.google.android.mms.MmsException; import com.google.android.mms.pdu.PduBody; import com.google.android.mms.pdu.PduPart; public class MediaModelFactory { private static final String TAG = LogTag.TAG; public static MediaModel getMediaModel(Context context, SMILMediaElement sme, LayoutModel layouts, PduBody pb) throws 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 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, RegionModel regionModel) throws IOException { return 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 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 (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, 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; } }