1/*
2 * Copyright (C) 2012 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
17package com.android.gallery3d.app;
18
19import android.app.ActionBar;
20import android.app.Activity;
21import android.app.ProgressDialog;
22import android.content.Context;
23import android.content.Intent;
24import android.media.MediaPlayer;
25import android.net.Uri;
26import android.os.Bundle;
27import android.os.Handler;
28import android.provider.MediaStore;
29import android.view.View;
30import android.view.ViewGroup;
31import android.view.Window;
32import android.widget.TextView;
33import android.widget.Toast;
34import android.widget.VideoView;
35
36import com.android.gallery3d.R;
37import com.android.gallery3d.util.SaveVideoFileInfo;
38import com.android.gallery3d.util.SaveVideoFileUtils;
39
40import java.io.File;
41import java.io.IOException;
42
43public class TrimVideo extends Activity implements
44        MediaPlayer.OnErrorListener,
45        MediaPlayer.OnCompletionListener,
46        ControllerOverlay.Listener {
47
48    private VideoView mVideoView;
49    private TextView mSaveVideoTextView;
50    private TrimControllerOverlay mController;
51    private Context mContext;
52    private Uri mUri;
53    private final Handler mHandler = new Handler();
54    public static final String TRIM_ACTION = "com.android.camera.action.TRIM";
55
56    public ProgressDialog mProgress;
57
58    private int mTrimStartTime = 0;
59    private int mTrimEndTime = 0;
60    private int mVideoPosition = 0;
61    public static final String KEY_TRIM_START = "trim_start";
62    public static final String KEY_TRIM_END = "trim_end";
63    public static final String KEY_VIDEO_POSITION = "video_pos";
64    private boolean mHasPaused = false;
65
66    private String mSrcVideoPath = null;
67    private static final String TIME_STAMP_NAME = "'TRIM'_yyyyMMdd_HHmmss";
68    private SaveVideoFileInfo mDstFileInfo = null;
69
70    @Override
71    public void onCreate(Bundle savedInstanceState) {
72        mContext = getApplicationContext();
73        super.onCreate(savedInstanceState);
74
75        requestWindowFeature(Window.FEATURE_ACTION_BAR);
76        requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
77
78        ActionBar actionBar = getActionBar();
79        int displayOptions = ActionBar.DISPLAY_SHOW_HOME;
80        actionBar.setDisplayOptions(0, displayOptions);
81        displayOptions = ActionBar.DISPLAY_SHOW_CUSTOM;
82        actionBar.setDisplayOptions(displayOptions, displayOptions);
83        actionBar.setCustomView(R.layout.trim_menu);
84
85        mSaveVideoTextView = (TextView) findViewById(R.id.start_trim);
86        mSaveVideoTextView.setOnClickListener(new View.OnClickListener() {
87            @Override
88            public void onClick(View arg0) {
89                trimVideo();
90            }
91        });
92        mSaveVideoTextView.setEnabled(false);
93
94        Intent intent = getIntent();
95        mUri = intent.getData();
96        mSrcVideoPath = intent.getStringExtra(PhotoPage.KEY_MEDIA_ITEM_PATH);
97        setContentView(R.layout.trim_view);
98        View rootView = findViewById(R.id.trim_view_root);
99
100        mVideoView = (VideoView) rootView.findViewById(R.id.surface_view);
101
102        mController = new TrimControllerOverlay(mContext);
103        ((ViewGroup) rootView).addView(mController.getView());
104        mController.setListener(this);
105        mController.setCanReplay(true);
106
107        mVideoView.setOnErrorListener(this);
108        mVideoView.setOnCompletionListener(this);
109        mVideoView.setVideoURI(mUri);
110
111        playVideo();
112    }
113
114    @Override
115    public void onResume() {
116        super.onResume();
117        if (mHasPaused) {
118            mVideoView.seekTo(mVideoPosition);
119            mVideoView.resume();
120            mHasPaused = false;
121        }
122        mHandler.post(mProgressChecker);
123    }
124
125    @Override
126    public void onPause() {
127        mHasPaused = true;
128        mHandler.removeCallbacksAndMessages(null);
129        mVideoPosition = mVideoView.getCurrentPosition();
130        mVideoView.suspend();
131        super.onPause();
132    }
133
134    @Override
135    public void onStop() {
136        if (mProgress != null) {
137            mProgress.dismiss();
138            mProgress = null;
139        }
140        super.onStop();
141    }
142
143    @Override
144    public void onDestroy() {
145        mVideoView.stopPlayback();
146        super.onDestroy();
147    }
148
149    private final Runnable mProgressChecker = new Runnable() {
150        @Override
151        public void run() {
152            int pos = setProgress();
153            mHandler.postDelayed(mProgressChecker, 200 - (pos % 200));
154        }
155    };
156
157    @Override
158    public void onSaveInstanceState(Bundle savedInstanceState) {
159        savedInstanceState.putInt(KEY_TRIM_START, mTrimStartTime);
160        savedInstanceState.putInt(KEY_TRIM_END, mTrimEndTime);
161        savedInstanceState.putInt(KEY_VIDEO_POSITION, mVideoPosition);
162        super.onSaveInstanceState(savedInstanceState);
163    }
164
165    @Override
166    public void onRestoreInstanceState(Bundle savedInstanceState) {
167        super.onRestoreInstanceState(savedInstanceState);
168        mTrimStartTime = savedInstanceState.getInt(KEY_TRIM_START, 0);
169        mTrimEndTime = savedInstanceState.getInt(KEY_TRIM_END, 0);
170        mVideoPosition = savedInstanceState.getInt(KEY_VIDEO_POSITION, 0);
171    }
172
173    // This updates the time bar display (if necessary). It is called by
174    // mProgressChecker and also from places where the time bar needs
175    // to be updated immediately.
176    private int setProgress() {
177        mVideoPosition = mVideoView.getCurrentPosition();
178        // If the video position is smaller than the starting point of trimming,
179        // correct it.
180        if (mVideoPosition < mTrimStartTime) {
181            mVideoView.seekTo(mTrimStartTime);
182            mVideoPosition = mTrimStartTime;
183        }
184        // If the position is bigger than the end point of trimming, show the
185        // replay button and pause.
186        if (mVideoPosition >= mTrimEndTime && mTrimEndTime > 0) {
187            if (mVideoPosition > mTrimEndTime) {
188                mVideoView.seekTo(mTrimEndTime);
189                mVideoPosition = mTrimEndTime;
190            }
191            mController.showEnded();
192            mVideoView.pause();
193        }
194
195        int duration = mVideoView.getDuration();
196        if (duration > 0 && mTrimEndTime == 0) {
197            mTrimEndTime = duration;
198        }
199        mController.setTimes(mVideoPosition, duration, mTrimStartTime, mTrimEndTime);
200        // Enable save if there's modifications
201        mSaveVideoTextView.setEnabled(isModified());
202        return mVideoPosition;
203    }
204
205    private void playVideo() {
206        mVideoView.start();
207        mController.showPlaying();
208        setProgress();
209    }
210
211    private void pauseVideo() {
212        mVideoView.pause();
213        mController.showPaused();
214    }
215
216
217    private boolean isModified() {
218        int delta = mTrimEndTime - mTrimStartTime;
219
220        // Considering that we only trim at sync frame, we don't want to trim
221        // when the time interval is too short or too close to the origin.
222        if (delta < 100 || Math.abs(mVideoView.getDuration() - delta) < 100) {
223            return false;
224        } else {
225            return true;
226        }
227    }
228
229    private void trimVideo() {
230
231        mDstFileInfo = SaveVideoFileUtils.getDstMp4FileInfo(TIME_STAMP_NAME,
232                getContentResolver(), mUri, getString(R.string.folder_download));
233        final File mSrcFile = new File(mSrcVideoPath);
234
235        showProgressDialog();
236
237        new Thread(new Runnable() {
238            @Override
239            public void run() {
240                try {
241                    VideoUtils.startTrim(mSrcFile, mDstFileInfo.mFile,
242                            mTrimStartTime, mTrimEndTime);
243                    // Update the database for adding a new video file.
244                    SaveVideoFileUtils.insertContent(mDstFileInfo,
245                            getContentResolver(), mUri);
246                } catch (IOException e) {
247                    e.printStackTrace();
248                }
249                // After trimming is done, trigger the UI changed.
250                mHandler.post(new Runnable() {
251                    @Override
252                    public void run() {
253                        Toast.makeText(getApplicationContext(),
254                            getString(R.string.save_into, mDstFileInfo.mFolderName),
255                            Toast.LENGTH_SHORT)
256                            .show();
257                        // TODO: change trimming into a service to avoid
258                        // this progressDialog and add notification properly.
259                        if (mProgress != null) {
260                            mProgress.dismiss();
261                            mProgress = null;
262                            // Show the result only when the activity not stopped.
263                            Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
264                            intent.setDataAndType(Uri.fromFile(mDstFileInfo.mFile), "video/*");
265                            intent.putExtra(MediaStore.EXTRA_FINISH_ON_COMPLETION, false);
266                            startActivity(intent);
267                            finish();
268                        }
269                    }
270                });
271            }
272        }).start();
273    }
274
275    private void showProgressDialog() {
276        // create a background thread to trim the video.
277        // and show the progress.
278        mProgress = new ProgressDialog(this);
279        mProgress.setTitle(getString(R.string.trimming));
280        mProgress.setMessage(getString(R.string.please_wait));
281        // TODO: make this cancelable.
282        mProgress.setCancelable(false);
283        mProgress.setCanceledOnTouchOutside(false);
284        mProgress.show();
285    }
286
287    @Override
288    public void onPlayPause() {
289        if (mVideoView.isPlaying()) {
290            pauseVideo();
291        } else {
292            playVideo();
293        }
294    }
295
296    @Override
297    public void onSeekStart() {
298        pauseVideo();
299    }
300
301    @Override
302    public void onSeekMove(int time) {
303        mVideoView.seekTo(time);
304    }
305
306    @Override
307    public void onSeekEnd(int time, int start, int end) {
308        mVideoView.seekTo(time);
309        mTrimStartTime = start;
310        mTrimEndTime = end;
311        setProgress();
312    }
313
314    @Override
315    public void onShown() {
316    }
317
318    @Override
319    public void onHidden() {
320    }
321
322    @Override
323    public void onReplay() {
324        mVideoView.seekTo(mTrimStartTime);
325        playVideo();
326    }
327
328    @Override
329    public void onCompletion(MediaPlayer mp) {
330        mController.showEnded();
331    }
332
333    @Override
334    public boolean onError(MediaPlayer mp, int what, int extra) {
335        return false;
336    }
337}
338