1package eu.siacs.conversations.ui;
2
3import android.app.Activity;
4import android.content.Intent;
5import android.media.MediaRecorder;
6import android.net.Uri;
7import android.os.Build;
8import android.os.Bundle;
9import android.os.Environment;
10import android.os.FileObserver;
11import android.os.Handler;
12import android.os.SystemClock;
13import android.util.Log;
14import android.view.View;
15import android.view.WindowManager;
16import android.widget.Toast;
17
18import androidx.databinding.DataBindingUtil;
19
20import java.io.File;
21import java.lang.ref.WeakReference;
22import java.text.SimpleDateFormat;
23import java.util.Date;
24import java.util.Locale;
25import java.util.Objects;
26import java.util.concurrent.CountDownLatch;
27import java.util.concurrent.TimeUnit;
28
29import eu.siacs.conversations.Config;
30import eu.siacs.conversations.R;
31import eu.siacs.conversations.databinding.ActivityRecordingBinding;
32import eu.siacs.conversations.ui.util.SettingsUtils;
33import eu.siacs.conversations.utils.ThemeHelper;
34import eu.siacs.conversations.utils.TimeFrameUtils;
35
36public class RecordingActivity extends Activity implements View.OnClickListener {
37
38 private ActivityRecordingBinding binding;
39
40 private MediaRecorder mRecorder;
41 private long mStartTime = 0;
42
43 private final CountDownLatch outputFileWrittenLatch = new CountDownLatch(1);
44
45 private final Handler mHandler = new Handler();
46 private final Runnable mTickExecutor =
47 new Runnable() {
48 @Override
49 public void run() {
50 tick();
51 mHandler.postDelayed(mTickExecutor, 100);
52 }
53 };
54
55 private File mOutputFile;
56
57 private FileObserver mFileObserver;
58
59 @Override
60 protected void onCreate(Bundle savedInstanceState) {
61 setTheme(ThemeHelper.findDialog(this));
62 super.onCreate(savedInstanceState);
63 this.binding = DataBindingUtil.setContentView(this, R.layout.activity_recording);
64 this.binding.cancelButton.setOnClickListener(this);
65 this.binding.shareButton.setOnClickListener(this);
66 this.setFinishOnTouchOutside(false);
67 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
68 }
69
70 @Override
71 protected void onResume() {
72 super.onResume();
73 SettingsUtils.applyScreenshotPreventionSetting(this);
74 }
75
76 @Override
77 protected void onStart() {
78 super.onStart();
79 if (!startRecording()) {
80 this.binding.shareButton.setEnabled(false);
81 this.binding.timer.setTextAppearance(this, R.style.TextAppearance_Conversations_Title);
82 this.binding.timer.setText(R.string.unable_to_start_recording);
83 }
84 }
85
86 @Override
87 protected void onStop() {
88 super.onStop();
89 if (mRecorder != null) {
90 mHandler.removeCallbacks(mTickExecutor);
91 stopRecording(false);
92 }
93 if (mFileObserver != null) {
94 mFileObserver.stopWatching();
95 }
96 }
97
98 private boolean startRecording() {
99 mRecorder = new MediaRecorder();
100 mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
101 mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
102 mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
103 mRecorder.setAudioEncodingBitRate(96000);
104 mRecorder.setAudioSamplingRate(22050);
105 setupOutputFile();
106 mRecorder.setOutputFile(mOutputFile.getAbsolutePath());
107
108 try {
109 mRecorder.prepare();
110 mRecorder.start();
111 mStartTime = SystemClock.elapsedRealtime();
112 mHandler.postDelayed(mTickExecutor, 100);
113 Log.d("Voice Recorder", "started recording to " + mOutputFile.getAbsolutePath());
114 return true;
115 } catch (Exception e) {
116 Log.e("Voice Recorder", "prepare() failed " + e.getMessage());
117 return false;
118 }
119 }
120
121 protected void stopRecording(final boolean saveFile) {
122 try {
123 mRecorder.stop();
124 mRecorder.release();
125 } catch (Exception e) {
126 if (saveFile) {
127 Toast.makeText(this, R.string.unable_to_save_recording, Toast.LENGTH_SHORT).show();
128 return;
129 }
130 } finally {
131 mRecorder = null;
132 mStartTime = 0;
133 }
134 if (!saveFile && mOutputFile != null) {
135 if (mOutputFile.delete()) {
136 Log.d(Config.LOGTAG, "deleted canceled recording");
137 }
138 }
139 if (saveFile) {
140 new Thread(new Finisher(outputFileWrittenLatch, mOutputFile, this)).start();
141 }
142 }
143
144 private static class Finisher implements Runnable {
145
146 private final CountDownLatch latch;
147 private final File outputFile;
148 private final WeakReference<Activity> activityReference;
149
150 private Finisher(CountDownLatch latch, File outputFile, Activity activity) {
151 this.latch = latch;
152 this.outputFile = outputFile;
153 this.activityReference = new WeakReference<>(activity);
154 }
155
156 @Override
157 public void run() {
158 try {
159 if (!latch.await(8, TimeUnit.SECONDS)) {
160 Log.d(Config.LOGTAG, "time out waiting for output file to be written");
161 }
162 } catch (final InterruptedException e) {
163 Log.d(Config.LOGTAG, "interrupted while waiting for output file to be written", e);
164 }
165 final Activity activity = activityReference.get();
166 if (activity == null) {
167 return;
168 }
169 activity.runOnUiThread(
170 () -> {
171 activity.setResult(
172 Activity.RESULT_OK, new Intent().setData(Uri.fromFile(outputFile)));
173 activity.finish();
174 });
175 }
176 }
177
178 private File generateOutputFilename() {
179 final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
180 final String filename = "RECORDING_" + dateFormat.format(new Date()) + ".m4a";
181 final File parentDirectory;
182 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
183 parentDirectory =
184 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_RECORDINGS);
185 } else {
186 parentDirectory =
187 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
188 }
189 final File conversationsDirectory = new File(parentDirectory, getString(R.string.app_name));
190 return new File(conversationsDirectory, filename);
191 }
192
193 private void setupOutputFile() {
194 mOutputFile = generateOutputFilename();
195 final File parentDirectory = mOutputFile.getParentFile();
196 if (Objects.requireNonNull(parentDirectory).mkdirs()) {
197 Log.d(Config.LOGTAG, "created " + parentDirectory.getAbsolutePath());
198 }
199 setupFileObserver(parentDirectory);
200 }
201
202 private void setupFileObserver(final File directory) {
203 mFileObserver =
204 new FileObserver(directory.getAbsolutePath()) {
205 @Override
206 public void onEvent(int event, String s) {
207 if (s != null
208 && s.equals(mOutputFile.getName())
209 && event == FileObserver.CLOSE_WRITE) {
210 outputFileWrittenLatch.countDown();
211 }
212 }
213 };
214 mFileObserver.startWatching();
215 }
216
217 private void tick() {
218 this.binding.timer.setText(TimeFrameUtils.formatTimePassed(mStartTime, true));
219 }
220
221 @Override
222 public void onClick(final View view) {
223 switch (view.getId()) {
224 case R.id.cancel_button:
225 mHandler.removeCallbacks(mTickExecutor);
226 stopRecording(false);
227 setResult(RESULT_CANCELED);
228 finish();
229 break;
230 case R.id.share_button:
231 this.binding.shareButton.setEnabled(false);
232 this.binding.shareButton.setText(R.string.please_wait);
233 mHandler.removeCallbacks(mTickExecutor);
234 mHandler.postDelayed(() -> stopRecording(true), 500);
235 break;
236 }
237 }
238}