MediaModelFactory.java revision f7e8281a223af6228e6399055a6197a1edd9bc3a 
1/*
2 * Copyright (C) 2008 Esmertec AG.
3 * Copyright (C) 2008 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mms.model;
19
20import com.android.mms.UnsupportContentTypeException;
21import com.android.mms.LogTag;
22import com.android.mms.MmsConfig;
23import android.drm.mobile1.DrmException;
24import com.android.mms.drm.DrmWrapper;
25import com.google.android.mms.ContentType;
26import com.google.android.mms.MmsException;
27import com.google.android.mms.pdu.PduBody;
28import com.google.android.mms.pdu.PduPart;
29
30import org.w3c.dom.smil.SMILMediaElement;
31import org.w3c.dom.smil.SMILRegionElement;
32import org.w3c.dom.smil.SMILRegionMediaElement;
33import org.w3c.dom.smil.Time;
34import org.w3c.dom.smil.TimeList;
35
36import android.content.Context;
37import android.util.Log;
38
39import java.io.IOException;
40
41public class MediaModelFactory {
42    private static final String TAG = "Mms:media";
43
44    public static MediaModel getMediaModel(Context context,
45            SMILMediaElement sme, LayoutModel layouts, PduBody pb)
46            throws DrmException, IOException, IllegalArgumentException, MmsException {
47        String tag = sme.getTagName();
48        String src = sme.getSrc();
49        PduPart part = findPart(pb, src);
50
51        if (sme instanceof SMILRegionMediaElement) {
52            return getRegionMediaModel(
53                    context, tag, src, (SMILRegionMediaElement) sme, layouts, part);
54        } else {
55            return getGenericMediaModel(
56                    context, tag, src, sme, part, null);
57        }
58    }
59
60    private static PduPart findPart(PduBody pb, String src) {
61        PduPart part = null;
62
63        if (src != null) {
64            if (src.startsWith("cid:")) {
65                part = pb.getPartByContentId("<" + src.substring("cid:".length()) + ">");
66            } else {
67                part = pb.getPartByName(src);
68                if (part == null) {
69                    part = pb.getPartByFileName(src);
70                    if (part == null) {
71                        part = pb.getPartByContentLocation(src);
72                    }
73                }
74            }
75        }
76
77        if (part != null) {
78            return part;
79        }
80
81        throw new IllegalArgumentException("No part found for the model.");
82    }
83
84    private static MediaModel getRegionMediaModel(Context context,
85            String tag, String src, SMILRegionMediaElement srme,
86            LayoutModel layouts, PduPart part) throws DrmException, IOException, MmsException {
87        SMILRegionElement sre = srme.getRegion();
88        if (sre != null) {
89            RegionModel region = layouts.findRegionById(sre.getId());
90            if (region != null) {
91                return getGenericMediaModel(context, tag, src, srme, part, region);
92            }
93        } else {
94            String rId = null;
95
96            if (tag.equals(SmilHelper.ELEMENT_TAG_TEXT)) {
97                rId = LayoutModel.TEXT_REGION_ID;
98            } else {
99                rId = LayoutModel.IMAGE_REGION_ID;
100            }
101
102            RegionModel region = layouts.findRegionById(rId);
103            if (region != null) {
104                return getGenericMediaModel(context, tag, src, srme, part, region);
105            }
106        }
107
108        throw new IllegalArgumentException("Region not found or bad region ID.");
109    }
110
111    private static MediaModel getGenericMediaModel(Context context,
112            String tag, String src, SMILMediaElement sme, PduPart part,
113            RegionModel regionModel) throws DrmException, IOException, MmsException {
114        byte[] bytes = part.getContentType();
115        if (bytes == null) {
116            throw new IllegalArgumentException(
117                    "Content-Type of the part may not be null.");
118        }
119
120        String contentType = new String(bytes);
121        MediaModel media = null;
122        if (ContentType.isDrmType(contentType)) {
123            DrmWrapper wrapper = new DrmWrapper(
124                    contentType, part.getDataUri(), part.getData());
125            if (tag.equals(SmilHelper.ELEMENT_TAG_TEXT)) {
126                media = new TextModel(context, contentType, src,
127                        part.getCharset(), wrapper, regionModel);
128            } else if (tag.equals(SmilHelper.ELEMENT_TAG_IMAGE)) {
129                media = new ImageModel(context, contentType, src,
130                        wrapper, regionModel);
131            } else if (tag.equals(SmilHelper.ELEMENT_TAG_VIDEO)) {
132                media = new VideoModel(context, contentType, src,
133                        wrapper, regionModel);
134            } else if (tag.equals(SmilHelper.ELEMENT_TAG_AUDIO)) {
135                media = new AudioModel(context, contentType, src,
136                        wrapper);
137            } else if (tag.equals(SmilHelper.ELEMENT_TAG_REF)) {
138                String drmContentType = wrapper.getContentType();
139                if (ContentType.isTextType(drmContentType)) {
140                    media = new TextModel(context, contentType, src,
141                            part.getCharset(), wrapper, regionModel);
142                } else if (ContentType.isImageType(drmContentType)) {
143                    media = new ImageModel(context, contentType, src,
144                            wrapper, regionModel);
145                } else if (ContentType.isVideoType(drmContentType)) {
146                    media = new VideoModel(context, contentType, src,
147                            wrapper, regionModel);
148                } else if (ContentType.isAudioType(drmContentType)) {
149                    media = new AudioModel(context, contentType, src,
150                            wrapper);
151                } else {
152                    throw new UnsupportContentTypeException(
153                        "Unsupported Content-Type: " + drmContentType);
154                }
155            } else {
156                throw new IllegalArgumentException("Unsupported TAG: " + tag);
157            }
158        } else {
159            if (tag.equals(SmilHelper.ELEMENT_TAG_TEXT)) {
160                media = new TextModel(context, contentType, src,
161                        part.getCharset(), part.getData(), regionModel);
162            } else if (tag.equals(SmilHelper.ELEMENT_TAG_IMAGE)) {
163                media = new ImageModel(context, contentType, src,
164                        part.getDataUri(), regionModel);
165            } else if (tag.equals(SmilHelper.ELEMENT_TAG_VIDEO)) {
166                media = new VideoModel(context, contentType, src,
167                        part.getDataUri(), regionModel);
168            } else if (tag.equals(SmilHelper.ELEMENT_TAG_AUDIO)) {
169                media = new AudioModel(context, contentType, src,
170                        part.getDataUri());
171            } else if (tag.equals(SmilHelper.ELEMENT_TAG_REF)) {
172                if (ContentType.isTextType(contentType)) {
173                    media = new TextModel(context, contentType, src,
174                            part.getCharset(), part.getData(), regionModel);
175                } else if (ContentType.isImageType(contentType)) {
176                    media = new ImageModel(context, contentType, src,
177                            part.getDataUri(), regionModel);
178                } else if (ContentType.isVideoType(contentType)) {
179                    media = new VideoModel(context, contentType, src,
180                            part.getDataUri(), regionModel);
181                } else if (ContentType.isAudioType(contentType)) {
182                    media = new AudioModel(context, contentType, src,
183                            part.getDataUri());
184                } else {
185                    throw new UnsupportContentTypeException(
186                        "Unsupported Content-Type: " + contentType);
187                }
188            } else {
189                throw new IllegalArgumentException("Unsupported TAG: " + tag);
190            }
191        }
192
193        // Set 'begin' property.
194        int begin = 0;
195        TimeList tl = sme.getBegin();
196        if ((tl != null) && (tl.getLength() > 0)) {
197            // We only support a single begin value.
198            Time t = tl.item(0);
199            begin = (int) (t.getResolvedOffset() * 1000);
200        }
201        media.setBegin(begin);
202
203        // Set 'duration' property.
204        int duration = (int) (sme.getDur() * 1000);
205        if (duration <= 0) {
206            tl = sme.getEnd();
207            if ((tl != null) && (tl.getLength() > 0)) {
208                // We only support a single end value.
209                Time t = tl.item(0);
210                if (t.getTimeType() != Time.SMIL_TIME_INDEFINITE) {
211                    duration = (int) (t.getResolvedOffset() * 1000) - begin;
212
213                    if (duration == 0 &&
214                            (media instanceof AudioModel || media instanceof VideoModel)) {
215                        duration = MmsConfig.getMinimumSlideElementDuration();
216                        if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
217                            Log.d(TAG, "[MediaModelFactory] compute new duration for " + tag +
218                                    ", duration=" + duration);
219                        }
220                    }
221                }
222            }
223        }
224
225        media.setDuration(duration);
226
227        // Set 'fill' property.
228        media.setFill(sme.getFill());
229        return media;
230    }
231}
232