1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18package android.media.videoeditor;
19
20import java.io.File;
21import java.io.FileNotFoundException;
22import java.io.IOException;
23
24import android.media.videoeditor.VideoEditor.MediaProcessingProgressListener;
25
26/**
27 * The VideoEditorFactory class must be used to instantiate VideoEditor objects
28 * by creating a new project {@link #create(String)} or by loading an
29 * existing project {@link #load(String)}.
30 * {@hide}
31 */
32public class VideoEditorFactory {
33    /**
34     * This is the factory method for creating a new VideoEditor instance.
35     *
36     * @param projectPath The path where all VideoEditor internal
37     *            files are stored. When a project is deleted the application is
38     *            responsible for deleting the path and its contents.
39     *
40     * @return The VideoEditor instance
41     *
42     * @throws IOException if path does not exist or if the path can
43     *             not be accessed in read/write mode
44     */
45    public static VideoEditor create(String projectPath) throws IOException {
46        /*
47         *  If the project path does not exist create it
48         */
49        final File dir = new File(projectPath);
50        if (!dir.exists()) {
51            if (!dir.mkdirs()) {
52                throw new FileNotFoundException("Cannot create project path: "
53                                                                 + projectPath);
54            } else {
55                /*
56                 * Create the file which hides the media files
57                 * from the media scanner
58                 */
59                if (!new File(dir, ".nomedia").createNewFile()) {
60                    throw new FileNotFoundException("Cannot create file .nomedia");
61                }
62            }
63        }
64
65        return new VideoEditorImpl(projectPath);
66    }
67
68    /**
69     * This is the factory method for instantiating a VideoEditor from the
70     * internal state previously saved with the
71     * {@link VideoEditor#save(String)} method.
72     *
73     * @param projectPath The path where all VideoEditor internal files
74     *            are stored. When a project is deleted the application is
75     *            responsible for deleting the path and its contents.
76     * @param generatePreview if set to true the
77     *      {@link MediaEditor#generatePreview(MediaProcessingProgressListener
78     *             listener)}
79     *      will be called internally to generate any needed transitions.
80     *
81     * @return The VideoEditor instance
82     *
83     * @throws IOException if path does not exist or if the path can
84     *             not be accessed in read/write mode or if one of the resource
85     *             media files cannot be retrieved
86     */
87    public static VideoEditor load(String projectPath, boolean generatePreview)
88        throws IOException {
89        final VideoEditor videoEditor = new VideoEditorImpl(projectPath);
90        if (generatePreview) {
91            videoEditor.generatePreview(null);
92        }
93        return videoEditor;
94    }
95}
96