├── Android
├── .gitignore
├── Android.iml
├── app
│ ├── .gitignore
│ ├── app.iml
│ ├── build.gradle
│ ├── proguard-rules.pro
│ └── src
│ │ └── main
│ │ ├── AndroidManifest.xml
│ │ ├── java
│ │ └── com
│ │ │ └── superpowered
│ │ │ └── superpoweredlatency
│ │ │ ├── MainActivity.java
│ │ │ └── SettingsActivity.java
│ │ ├── jni
│ │ ├── CMakeLists.txt
│ │ ├── SuperpoweredLatency.cpp
│ │ ├── latencyMeasurer.cpp
│ │ └── latencyMeasurer.h
│ │ └── res
│ │ ├── drawable-hdpi
│ │ ├── ic_launcher.png
│ │ └── superpowered.png
│ │ ├── drawable-mdpi
│ │ ├── ic_launcher.png
│ │ └── superpowered.png
│ │ ├── drawable-xhdpi
│ │ ├── ic_launcher.png
│ │ └── superpowered.png
│ │ ├── drawable-xxhdpi
│ │ ├── ic_launcher.png
│ │ └── superpowered.png
│ │ ├── layout
│ │ └── activity_main.xml
│ │ ├── menu
│ │ └── menu_main.xml
│ │ ├── values-w820dp
│ │ └── dimens.xml
│ │ ├── values
│ │ ├── dimens.xml
│ │ ├── strings.xml
│ │ └── styles.xml
│ │ └── xml
│ │ ├── network_security_config.xml
│ │ └── preferences.xml
├── build.gradle
├── gradle.properties
├── gradle
│ └── wrapper
│ │ ├── gradle-wrapper.jar
│ │ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── settings.gradle
├── LICENSE
├── README.md
└── iOS
├── AppDelegate.h
├── AppDelegate.m
├── Assets.xcassets
├── AccentColor.colorset
│ └── Contents.json
├── AppIcon.appiconset
│ ├── Contents.json
│ ├── Icon-1024 1.png
│ ├── Icon-1024.png
│ ├── Icon-120 1.png
│ ├── Icon-120.png
│ ├── Icon-128.png
│ ├── Icon-152.png
│ ├── Icon-16.png
│ ├── Icon-167.png
│ ├── Icon-180.png
│ ├── Icon-20.png
│ ├── Icon-256 1.png
│ ├── Icon-256.png
│ ├── Icon-29.png
│ ├── Icon-32 1.png
│ ├── Icon-32.png
│ ├── Icon-40 1.png
│ ├── Icon-40 2.png
│ ├── Icon-40.png
│ ├── Icon-512 1.png
│ ├── Icon-512.png
│ ├── Icon-58 1.png
│ ├── Icon-58.png
│ ├── Icon-60.png
│ ├── Icon-64.png
│ ├── Icon-76.png
│ ├── Icon-80 1.png
│ ├── Icon-80.png
│ └── Icon-87.png
├── Contents.json
├── bg.imageset
│ ├── Contents.json
│ ├── wave-1.svg
│ ├── wave-2.svg
│ └── wave.svg
└── superpoweredLogo.imageset
│ ├── Contents.json
│ ├── superpowered-black-1.svg
│ ├── superpowered-black-2.svg
│ └── superpowered-black.svg
├── Images.xcassets
└── AppIcon.appiconset
│ └── Contents.json
├── Info.plist
├── Main.storyboard
├── SuperpoweredLatency.xcodeproj
├── project.pbxproj
├── project.xcworkspace
│ ├── contents.xcworkspacedata
│ ├── xcshareddata
│ │ ├── IDEWorkspaceChecks.plist
│ │ └── SuperpoweredLatency.xccheckout
│ └── xcuserdata
│ │ ├── gaborszanto.xcuserdatad
│ │ └── UserInterfaceState.xcuserstate
│ │ └── szantog.xcuserdatad
│ │ └── UserInterfaceState.xcuserstate
└── xcuserdata
│ ├── gaborszanto.xcuserdatad
│ └── xcschemes
│ │ ├── SuperpoweredLatency.xcscheme
│ │ └── xcschememanagement.plist
│ └── szantog.xcuserdatad
│ ├── xcdebugger
│ └── Breakpoints_v2.xcbkptlist
│ └── xcschemes
│ ├── SuperpoweredLatency.xcscheme
│ └── xcschememanagement.plist
├── ViewController.h
├── ViewController.mm
├── machines.h
├── main.m
├── superpowered.png
├── superpowered@2x.png
└── superpowered@3x.png
/Android/.gitignore:
--------------------------------------------------------------------------------
1 | *.iml
2 | .gradle
3 | /local.properties
4 | /.idea/caches
5 | /.idea/libraries
6 | /.idea/modules.xml
7 | /.idea/workspace.xml
8 | /.idea/navEditor.xml
9 | /.idea/assetWizardSettings.xml
10 | .DS_Store
11 | /build
12 | /captures
13 | .externalNativeBuild
14 | .cxx
15 | local.properties
16 |
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/Android/Android.iml:
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/Android/app/.gitignore:
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/Android/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 33
5 |
6 | defaultConfig {
7 | applicationId "com.superpowered.superpoweredlatency"
8 | minSdkVersion 19
9 | targetSdkVersion 33
10 | versionCode 5
11 | versionName "1.9.1"
12 |
13 | ndk { // these platforms cover 99% percent of all Android devices
14 | abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
15 | }
16 |
17 | externalNativeBuild {
18 | cmake {
19 | arguments '-DANDROID_PLATFORM=android-26', '-DANDROID_TOOLCHAIN=clang', '-DANDROID_ARM_NEON=TRUE', '-DANDROID_STL=c++_shared'
20 | cFlags '-O3', '-fsigned-char' // full optimization, char data type is signed
21 | cppFlags '-fsigned-char'
22 | }
23 | }
24 | }
25 |
26 | externalNativeBuild {
27 | cmake {
28 | path 'src/main/jni/CMakeLists.txt'
29 | }
30 | }
31 | }
32 |
33 | dependencies {
34 | implementation fileTree(dir: 'libs', include: ['*.jar'])
35 | api 'com.android.support:appcompat-v7:27.1.1'
36 | }
37 |
--------------------------------------------------------------------------------
/Android/app/proguard-rules.pro:
--------------------------------------------------------------------------------
1 | # Add project specific ProGuard rules here.
2 | # By default, the flags in this file are appended to flags specified
3 | # in /android/sdk/tools/proguard/proguard-android.txt
4 | # You can edit the include path and order by changing the proguardFiles
5 | # directive in build.gradle.
6 | #
7 | # For more details, see
8 | # http://developer.android.com/guide/developing/tools/proguard.html
9 |
10 | # Add any project specific keep options here:
11 |
12 | # If your project uses WebView with JS, uncomment the following
13 | # and specify the fully qualified class name to the JavaScript interface
14 | # class:
15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
16 | # public *;
17 | #}
18 |
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/Android/app/src/main/java/com/superpowered/superpoweredlatency/MainActivity.java:
--------------------------------------------------------------------------------
1 | package com.superpowered.superpoweredlatency;
2 |
3 | import android.Manifest;
4 | import android.content.BroadcastReceiver;
5 | import android.content.pm.PackageManager;
6 | import android.preference.PreferenceManager;
7 | import android.support.v4.app.ActivityCompat;
8 | import android.support.v4.content.ContextCompat;
9 | import android.os.Bundle;
10 | import android.support.v7.app.AppCompatActivity;
11 | import android.support.annotation.NonNull;
12 | import android.util.Base64;
13 | import android.view.Menu;
14 | import android.view.MenuItem;
15 | import android.media.AudioManager;
16 | import android.os.Build;
17 | import android.content.Context;
18 | import android.view.View;
19 | import android.widget.ProgressBar;
20 | import android.widget.RelativeLayout;
21 | import android.widget.TextView;
22 | import android.widget.Toast;
23 | import android.os.Handler;
24 | import android.net.Uri;
25 | import android.os.AsyncTask;
26 |
27 | import java.net.HttpURLConnection;
28 | import java.net.URL;
29 | import java.io.InputStream;
30 | import java.io.InputStreamReader;
31 | import java.io.IOException;
32 | import android.content.Intent;
33 | import android.content.IntentFilter;
34 |
35 | public class MainActivity extends AppCompatActivity {
36 | TextView button = null;
37 | TextView infoView = null;
38 | TextView status = null;
39 | TextView network = null;
40 | TextView website = null;
41 | RelativeLayout statusView = null;
42 | RelativeLayout resultsView = null;
43 | ProgressBar progress = null;
44 | int measurerState = -1000;
45 | private Handler handler;
46 | private boolean headphoneSocket = false;
47 | private boolean proAudioFlag = false;
48 |
49 | @Override
50 | protected void onCreate(Bundle savedInstanceState) {
51 | super.onCreate(savedInstanceState);
52 |
53 | boolean didAskForPermissions = false;
54 |
55 | if (Build.VERSION.SDK_INT >= 23) { // Need to ask for permissions.
56 | String[] permissions = {
57 | Manifest.permission.RECORD_AUDIO,
58 | Manifest.permission.MODIFY_AUDIO_SETTINGS,
59 | Manifest.permission.INTERNET,
60 | };
61 |
62 | for (String s:permissions) if (ContextCompat.checkSelfPermission(this, s) != PackageManager.PERMISSION_GRANTED) {
63 | didAskForPermissions = true;
64 | ActivityCompat.requestPermissions(this, permissions, 0);
65 | break;
66 | }
67 | }
68 |
69 | if (!didAskForPermissions) initialize();
70 | }
71 |
72 | @Override
73 | public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
74 | if ((requestCode != 0) || (grantResults.length < 1) || (grantResults.length != permissions.length)) return;
75 | boolean canInitialize = true;
76 | for (int grantResult:grantResults) if (grantResult != PackageManager.PERMISSION_GRANTED) {
77 | canInitialize = false;
78 | Toast.makeText(getApplicationContext(), "Please allow all permissions for the Latency Test app.", Toast.LENGTH_LONG).show();
79 | }
80 | if (canInitialize) initialize();
81 | }
82 |
83 | private void initialize() {
84 | setContentView(R.layout.activity_main);
85 |
86 | // Set up UI and display system information.
87 | try {
88 | TextView title = findViewById(R.id.header);
89 | title.setText("Superpowered Latency Test v" + getPackageManager().getPackageInfo(getPackageName(), 0).versionName);
90 | } catch (PackageManager.NameNotFoundException e) {
91 | e.printStackTrace();
92 | }
93 |
94 | TextView model = findViewById(R.id.model);
95 | model.setText(Build.MANUFACTURER + " " + Build.MODEL);
96 | TextView os = findViewById(R.id.os);
97 | os.setText("Android " + Build.VERSION.RELEASE + " " + Build.ID);
98 |
99 | button = findViewById(R.id.button);
100 | infoView = findViewById(R.id.infoview);
101 | statusView = findViewById(R.id.statusview);
102 | resultsView = findViewById(R.id.resultsview);
103 | status = findViewById(R.id.status);
104 | network = findViewById(R.id.network);
105 | progress = findViewById(R.id.progress);
106 | website = findViewById(R.id.website);
107 |
108 | if (Build.VERSION.SDK_INT >= 21) { // Check if there is something in the headphone socket.
109 | IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
110 | registerReceiver(new BroadcastReceiver() {
111 | @Override
112 | public void onReceive(Context context, Intent intent) {
113 | if (intent.getAction().equals(Intent.ACTION_HEADSET_PLUG)) {
114 | int state = intent.getIntExtra("state", -1);
115 | headphoneSocket = (state > 0);
116 | }
117 | }
118 | }, filter);
119 | }
120 |
121 | if (Build.VERSION.SDK_INT >= 23) { // Check for the pro audio flag.
122 | proAudioFlag = getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUDIO_PRO);
123 | }
124 |
125 | // Two native libs are built from the same code, one with and one without AAudio.
126 | try {
127 | System.loadLibrary("WithAAudio");
128 | } catch (UnsatisfiedLinkError e) { // If AAudio is not present, use the other one without it.
129 | System.loadLibrary("WithoutAAudio");
130 | }
131 |
132 | // Get the device's sample rate and buffer size to enable low-latency Android audio output, if available.
133 | AudioManager audioManager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
134 | String samplerateString = audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
135 | String buffersizeString = audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER);
136 | if (samplerateString == null) samplerateString = "48000";
137 | if (buffersizeString == null) buffersizeString = "960";
138 |
139 | // Call the native lib to set up.
140 | SuperpoweredLatency(Integer.parseInt(samplerateString), Integer.parseInt(buffersizeString));
141 |
142 | // Update UI every 40 ms until UI_update returns with false.
143 | Runnable runnable = new Runnable() {
144 | @Override
145 | public void run() {
146 | if (UI_update()) handler.postDelayed(this, 40);
147 | }
148 | };
149 | handler = new Handler();
150 | handler.postDelayed(runnable, 40);
151 | }
152 |
153 | // Encodes safe strings for network transfer.
154 | public String encodeString(String str) {
155 | return Base64.encodeToString(str.getBytes(), Base64.DEFAULT);
156 | }
157 |
158 | // Called periodically to update the UI.
159 | public boolean UI_update() {
160 | // Get the current state and latency values.
161 | long _state = getState();
162 | long _latencyMs = getLatencyMs();
163 |
164 | // Update the UI if the measurer's state has been changed.
165 | if ((measurerState != _state) || (_latencyMs < 0)) {
166 | measurerState = (int)_state;
167 |
168 | // Idle state.
169 | if (measurerState == 0) {
170 | infoView.setVisibility(View.VISIBLE);
171 | resultsView.setVisibility(View.INVISIBLE);
172 | statusView.setVisibility(View.INVISIBLE);
173 | button.setText("Start Latency Test");
174 |
175 | // Result or error.
176 | } else if (measurerState > 10) {
177 | if (_latencyMs == 0) {
178 | status.setText("Dispersion too big, please try again.");
179 | button.setText("Restart Test");
180 | toggleMeasurer(false); // Stopping the measurer.
181 | } else {
182 | infoView.setVisibility(View.INVISIBLE);
183 | resultsView.setVisibility(View.VISIBLE);
184 | statusView.setVisibility(View.INVISIBLE);
185 | website.setVisibility(View.INVISIBLE);
186 |
187 | long samplerate = getSamplerate();
188 | long buffersize = getBuffersize();
189 | boolean aaudio = getAAudio();
190 |
191 | ((TextView)findViewById(R.id.latency)).setText(_latencyMs + " ms");
192 | ((TextView)findViewById(R.id.buffersize)).setText(Long.toString(buffersize));
193 | ((TextView)findViewById(R.id.samplerate)).setText(samplerate + " Hz");
194 | ((TextView)findViewById(R.id.api)).setText(aaudio ? "AAudio" : "OpenSL ES");
195 | button.setText("Share Results");
196 |
197 | if (PreferenceManager.getDefaultSharedPreferences(getBaseContext()).getBoolean("submit", true)) {
198 | // Uploading the result to our server. Results with native buffer sizes are reported only.
199 | network.setText("Uploading data...");
200 | String url = Uri.parse("http://superpowered.com/latencydata/input.php?ms=" + _latencyMs + "&samplerate=" + samplerate + "&buffersize=" + buffersize + "&sapa=0&headphone=" + (headphoneSocket ? 1 : 0) + "&proaudio=" + (proAudioFlag ? 1 : 0) + "&aaudio=" + (aaudio ? 1 : 0))
201 | .buildUpon()
202 | .appendQueryParameter("model", encodeString(Build.MANUFACTURER + " " + Build.MODEL))
203 | .appendQueryParameter("os", encodeString(Build.VERSION.RELEASE))
204 | .appendQueryParameter("build", encodeString(Build.VERSION.INCREMENTAL))
205 | .appendQueryParameter("buildid", encodeString(Build.ID))
206 | .build().toString();
207 | new HTTPGetTask().execute(url);
208 | } else {
209 | network.setText("");
210 | website.setVisibility(View.VISIBLE);
211 | }
212 |
213 | toggleMeasurer(false); // Stopping the measurer.
214 | return false; // Stopping periodical UI updates.
215 | }
216 |
217 | // Measurement starts.
218 | } else if (measurerState == 1) {
219 | statusView.setVisibility(View.VISIBLE);
220 | resultsView.setVisibility(View.INVISIBLE);
221 | infoView.setVisibility(View.INVISIBLE);
222 | status.setText("? ms");
223 | progress.setProgress(0);
224 | button.setText("Cancel");
225 |
226 | // Measurement in progress.
227 | } else {
228 | if (_latencyMs < 0) status.setText("The environment is too loud!");
229 | else {
230 | status.setText(_latencyMs + " ms");
231 | progress.setProgress((measurerState - 1) * 10);
232 | }
233 | }
234 | }
235 | return true;
236 | }
237 |
238 | // When the user taps on the main button.
239 | public void onButton(View _button) {
240 | if (resultsView.getVisibility() == View.VISIBLE) { // Sharing results - let's hope this creates a small viral loop for us. :-)
241 | String model = ((TextView)findViewById(R.id.model)).getText().toString();
242 | if (model.length() > 40) model = model.substring(0, 40);
243 | String message = "I just tested my " + model + " with the Superpowered Latency Test App: " + ((TextView)findViewById(R.id.latency)).getText() + "\r\n\r\nhttp://superpowered.com/latency";
244 | Intent share = new Intent(Intent.ACTION_SEND);
245 | share.setType("text/plain");
246 | share.putExtra(Intent.EXTRA_TEXT, message);
247 | startActivity(Intent.createChooser(share, "Share Results"));
248 | } else {
249 | toggleMeasurer(PreferenceManager.getDefaultSharedPreferences(getBaseContext()).getBoolean("aaudio", false));
250 | long state = getState();
251 | button.setText(state > 0 ? "Cancel" : "Start Latency Test");
252 | }
253 | }
254 |
255 | public void onLatency(View _view) {
256 | Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://superpowered.com/latency"));
257 | startActivity(browserIntent);
258 | }
259 |
260 | public void onSuperpowered(View _view) {
261 | Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://superpowered.com/"));
262 | startActivity(browserIntent);
263 | }
264 |
265 | @Override
266 | public boolean onCreateOptionsMenu(Menu menu) {
267 | getMenuInflater().inflate(R.menu.menu_main, menu);
268 | return true;
269 | }
270 |
271 | @Override
272 | public boolean onOptionsItemSelected(MenuItem item) {
273 | return super.onOptionsItemSelected(item);
274 | }
275 |
276 | public void onSettings(View _view) {
277 | Intent settingsIntent = new Intent(this, SettingsActivity.class);
278 | startActivity(settingsIntent);
279 | }
280 |
281 | private native void SuperpoweredLatency(long samplerate, long buffersize);
282 | private native void toggleMeasurer(boolean useAAudioIfAvailable);
283 | private native int getState();
284 | private native int getLatencyMs();
285 | private native int getSamplerate();
286 | private native int getBuffersize();
287 | private native boolean getAAudio();
288 |
289 | // This performs the data upload to our server.
290 | private class HTTPGetTask extends AsyncTask {
291 | protected Boolean doInBackground(String... param) {
292 | boolean okay = false;
293 | try {
294 | URL url = new URL(param[0]);
295 | HttpURLConnection connection = (HttpURLConnection)url.openConnection();
296 | connection.setRequestMethod("GET");
297 | connection.setRequestProperty("Cache-Control", "no-cache");
298 | connection.setConnectTimeout(30000);
299 | connection.setReadTimeout(60000);
300 | try {
301 | InputStream in = connection.getInputStream();
302 | InputStreamReader reader = new InputStreamReader(in);
303 | for (int bytesRead = 0; bytesRead < 5; bytesRead++) if (reader.read() < 0) {
304 | if (bytesRead == 2) okay = true;
305 | break;
306 | }
307 | } catch(Exception e) {
308 | e.printStackTrace();
309 | } finally {
310 | connection.disconnect();
311 | }
312 | } catch (IOException e) {
313 | e.printStackTrace();
314 | return false;
315 | }
316 | return okay;
317 | }
318 |
319 | @Override
320 | protected void onPostExecute(Boolean result) {
321 | if (result) {
322 | network.setText("Thank you. We've uploaded the result to the latency benchmarking at:");
323 | website.setVisibility(View.VISIBLE);
324 | } else network.setText("Network error.");
325 | }
326 | }
327 | }
328 |
--------------------------------------------------------------------------------
/Android/app/src/main/java/com/superpowered/superpoweredlatency/SettingsActivity.java:
--------------------------------------------------------------------------------
1 | package com.superpowered.superpoweredlatency;
2 |
3 | import android.preference.PreferenceActivity;
4 | import android.os.Bundle;
5 | import android.preference.PreferenceFragment;
6 |
7 | public class SettingsActivity extends PreferenceActivity {
8 | @Override
9 | protected void onCreate(Bundle savedInstanceState) {
10 | super.onCreate(savedInstanceState);
11 | getFragmentManager().beginTransaction().replace(android.R.id.content, new SettingsFragment()).commit();
12 | }
13 |
14 | public static class SettingsFragment extends PreferenceFragment {
15 | @Override
16 | public void onCreate(final Bundle savedInstanceState) {
17 | super.onCreate(savedInstanceState);
18 | addPreferencesFromResource(R.xml.preferences);
19 | }
20 | }
21 | }
22 |
--------------------------------------------------------------------------------
/Android/app/src/main/jni/CMakeLists.txt:
--------------------------------------------------------------------------------
1 | cmake_minimum_required(VERSION 3.4.1)
2 |
3 | set(
4 | CACHE STRING ""
5 | )
6 |
7 | file(GLOB CPP_FILES "*.cpp")
8 |
9 | # Building two native libs from the same code, one with and one without AAudio.
10 |
11 | add_library(
12 | WithoutAAudio
13 | SHARED
14 | ${CPP_FILES}
15 | )
16 |
17 | add_library(
18 | WithAAudio
19 | SHARED
20 | ${CPP_FILES}
21 | )
22 |
23 | include_directories(src/main/jni)
24 |
25 | target_compile_definitions(WithoutAAudio PUBLIC HAS_AAUDIO=0)
26 |
27 | target_link_libraries(
28 | WithoutAAudio
29 | log
30 | android
31 | OpenSLES
32 | )
33 |
34 | target_compile_definitions(WithAAudio PUBLIC HAS_AAUDIO=1)
35 |
36 | target_link_libraries(
37 | WithAAudio
38 | log
39 | android
40 | OpenSLES
41 | aaudio
42 | )
43 |
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/Android/app/src/main/jni/SuperpoweredLatency.cpp:
--------------------------------------------------------------------------------
1 | #include "latencyMeasurer.h"
2 | #include
3 | #include
4 | #include
5 | #include
6 | #include
7 | #include
8 | #include
9 | #if HAS_AAUDIO == 1
10 | #include
11 | #endif
12 |
13 | #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, "superpoweredlatency", __VA_ARGS__)
14 |
15 | static int samplerate;
16 | static int buffersize;
17 | static latencyMeasurer *measurer;
18 | static bool hasAAudio = false;
19 | static bool isRunning = false;
20 |
21 | // ---------
22 | // OPENSL ES
23 | // ---------
24 |
25 | #define NUMOPENSLESBUFFERS 128
26 | static struct {
27 | SLObjectItf engine, outputMix, outputBufferQueue, inputBufferQueue;
28 | SLAndroidSimpleBufferQueueItf outputBufferQueueInterface, inputBufferQueueInterface;
29 | short int *inputBuffers[NUMOPENSLESBUFFERS], *outputBuffers[NUMOPENSLESBUFFERS];
30 | int samplerateFromJava, buffersizeFromJava, inputBufferWriteIndex, inputBufferReadIndex, inputBuffersAvailable, outputBufferWriteIndex;
31 | } openSLES;
32 |
33 | // Audio input comes here.
34 | static void openSLESInputCallback(SLAndroidSimpleBufferQueueItf caller, __unused void *pContext) {
35 | __sync_fetch_and_add(&openSLES.inputBuffersAvailable, 1);
36 | short int *inputBuffer = openSLES.inputBuffers[openSLES.inputBufferWriteIndex];
37 | if (openSLES.inputBufferWriteIndex < NUMOPENSLESBUFFERS - 1) openSLES.inputBufferWriteIndex++; else openSLES.inputBufferWriteIndex = 0;
38 | (*caller)->Enqueue(caller, inputBuffer, (SLuint32)buffersize * 4);
39 | }
40 |
41 | // Audio output must be provided here.
42 | static void openSLESOutputCallback(SLAndroidSimpleBufferQueueItf caller, __unused void *pContext) {
43 | short int *outputBuffer = openSLES.outputBuffers[openSLES.outputBufferWriteIndex];
44 | if (openSLES.outputBufferWriteIndex < NUMOPENSLESBUFFERS - 1) openSLES.outputBufferWriteIndex++; else openSLES.outputBufferWriteIndex = 0;
45 |
46 | if (__sync_fetch_and_add(&openSLES.inputBuffersAvailable, 0) > 0) {
47 | __sync_fetch_and_add(&openSLES.inputBuffersAvailable, -1);
48 | short int *inputBuffer = openSLES.inputBuffers[openSLES.inputBufferReadIndex];
49 | if (openSLES.inputBufferReadIndex < NUMOPENSLESBUFFERS - 1) openSLES.inputBufferReadIndex++; else openSLES.inputBufferReadIndex = 0;
50 |
51 | measurer->processInput(inputBuffer, samplerate, buffersize);
52 | measurer->processOutput(outputBuffer);
53 | if (measurer->state == -1) memcpy(outputBuffer, inputBuffer, (size_t)buffersize * 4);
54 | } else memset(outputBuffer, 0, (size_t)buffersize * 4);
55 |
56 | (*caller)->Enqueue(caller, outputBuffer, (SLuint32)buffersize * 4);
57 | }
58 |
59 | static void startOpenSLES() {
60 | hasAAudio = false;
61 | samplerate = openSLES.samplerateFromJava;
62 | buffersize = openSLES.buffersizeFromJava;
63 |
64 | openSLES.inputBufferWriteIndex = 1; // Start from 1, because we enqueue one buffer when we start the input buffer queue.
65 | openSLES.inputBufferReadIndex = 0;
66 | openSLES.inputBuffersAvailable = 0;
67 | openSLES.outputBufferWriteIndex = 1; // Start from 1, because we enqueue one buffer when we start the output buffer queue.
68 |
69 | // Allocating audio buffers for input and output.
70 | for (int n = 0; n < NUMOPENSLESBUFFERS; n++) {
71 | openSLES.inputBuffers[n] = (short int *)malloc(((size_t)buffersize + 16) * 4);
72 | openSLES.outputBuffers[n] = (short int *)malloc(((size_t)buffersize + 16) * 4);
73 | memset(openSLES.inputBuffers[n], 0, (size_t)buffersize * 4);
74 | memset(openSLES.outputBuffers[n], 0, (size_t)buffersize * 4);
75 | };
76 |
77 | const SLboolean requireds[2] = { SL_BOOLEAN_TRUE, SL_BOOLEAN_FALSE };
78 |
79 | // Create the OpenSL ES engine.
80 | slCreateEngine(&openSLES.engine, 0, NULL, 0, NULL, NULL);
81 | (*openSLES.engine)->Realize(openSLES.engine, SL_BOOLEAN_FALSE);
82 | SLEngineItf openSLEngineInterface = NULL;
83 | (*openSLES.engine)->GetInterface(openSLES.engine, SL_IID_ENGINE, &openSLEngineInterface);
84 | // Create the output mix.
85 | (*openSLEngineInterface)->CreateOutputMix(openSLEngineInterface, &openSLES.outputMix, 0, NULL, NULL);
86 | (*openSLES.outputMix)->Realize(openSLES.outputMix, SL_BOOLEAN_FALSE);
87 | SLDataLocator_OutputMix outputMixLocator = { SL_DATALOCATOR_OUTPUTMIX, openSLES.outputMix };
88 |
89 | // Create the output buffer queue.
90 | SLDataLocator_AndroidSimpleBufferQueue outputLocator = { SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 1 };
91 | SLDataFormat_PCM outputFormat = { SL_DATAFORMAT_PCM, 2, (SLuint32)samplerate * 1000, SL_PCMSAMPLEFORMAT_FIXED_16, SL_PCMSAMPLEFORMAT_FIXED_16, SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT, SL_BYTEORDER_LITTLEENDIAN };
92 | SLDataSource outputSource = { &outputLocator, &outputFormat };
93 | const SLInterfaceID outputInterfaces[1] = { SL_IID_BUFFERQUEUE };
94 | SLDataSink outputSink = { &outputMixLocator, NULL };
95 | (*openSLEngineInterface)->CreateAudioPlayer(openSLEngineInterface, &openSLES.outputBufferQueue, &outputSource, &outputSink, 1, outputInterfaces, requireds);
96 | (*openSLES.outputBufferQueue)->Realize(openSLES.outputBufferQueue, SL_BOOLEAN_FALSE);
97 |
98 | // Create the input buffer queue.
99 | SLDataLocator_IODevice deviceInputLocator = { SL_DATALOCATOR_IODEVICE, SL_IODEVICE_AUDIOINPUT, SL_DEFAULTDEVICEID_AUDIOINPUT, NULL };
100 | SLDataSource inputSource = { &deviceInputLocator, NULL };
101 | SLDataLocator_AndroidSimpleBufferQueue inputLocator = { SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 1 };
102 | SLDataFormat_PCM inputFormat = { SL_DATAFORMAT_PCM, 2, (SLuint32)samplerate * 1000, SL_PCMSAMPLEFORMAT_FIXED_16, SL_PCMSAMPLEFORMAT_FIXED_16, SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT, SL_BYTEORDER_LITTLEENDIAN };
103 | SLDataSink inputSink = { &inputLocator, &inputFormat };
104 | const SLInterfaceID inputInterfaces[2] = { SL_IID_ANDROIDSIMPLEBUFFERQUEUE, SL_IID_ANDROIDCONFIGURATION };
105 | (*openSLEngineInterface)->CreateAudioRecorder(openSLEngineInterface, &openSLES.inputBufferQueue, &inputSource, &inputSink, 2, inputInterfaces, requireds);
106 |
107 | // Configure the voice recognition preset which has no signal processing for lower latency.
108 | SLAndroidConfigurationItf inputConfiguration;
109 | if ((*openSLES.inputBufferQueue)->GetInterface(openSLES.inputBufferQueue, SL_IID_ANDROIDCONFIGURATION, &inputConfiguration) == SL_RESULT_SUCCESS) {
110 | SLuint32 presetValue = SL_ANDROID_RECORDING_PRESET_VOICE_RECOGNITION;
111 | (*inputConfiguration)->SetConfiguration(inputConfiguration, SL_ANDROID_KEY_RECORDING_PRESET, &presetValue, sizeof(SLuint32));
112 | };
113 | (*openSLES.inputBufferQueue)->Realize(openSLES.inputBufferQueue, SL_BOOLEAN_FALSE);
114 |
115 | // Initialize and start the output buffer queue.
116 | (*openSLES.outputBufferQueue)->GetInterface(openSLES.outputBufferQueue, SL_IID_BUFFERQUEUE, &openSLES.outputBufferQueueInterface);
117 | (*openSLES.outputBufferQueueInterface)->RegisterCallback(openSLES.outputBufferQueueInterface, openSLESOutputCallback, NULL);
118 | (*openSLES.outputBufferQueueInterface)->Enqueue(openSLES.outputBufferQueueInterface, openSLES.outputBuffers[0], (SLuint32)buffersize * 4);
119 | SLPlayItf outputPlayInterface;
120 | (*openSLES.outputBufferQueue)->GetInterface(openSLES.outputBufferQueue, SL_IID_PLAY, &outputPlayInterface);
121 | (*outputPlayInterface)->SetPlayState(outputPlayInterface, SL_PLAYSTATE_PLAYING);
122 |
123 | // Initialize and start the input buffer queue.
124 | (*openSLES.inputBufferQueue)->GetInterface(openSLES.inputBufferQueue, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, &openSLES.inputBufferQueueInterface);
125 | (*openSLES.inputBufferQueueInterface)->RegisterCallback(openSLES.inputBufferQueueInterface, openSLESInputCallback, NULL);
126 | SLRecordItf recordInterface;
127 | (*openSLES.inputBufferQueue)->GetInterface(openSLES.inputBufferQueue, SL_IID_RECORD, &recordInterface);
128 | (*openSLES.inputBufferQueueInterface)->Enqueue(openSLES.inputBufferQueueInterface, openSLES.inputBuffers[0], (SLuint32)buffersize * 4);
129 | (*recordInterface)->SetRecordState(recordInterface, SL_RECORDSTATE_RECORDING);
130 | }
131 |
132 | static void stopOpenSLES() {
133 | SLRecordItf recordInterface;
134 | (*openSLES.inputBufferQueue)->GetInterface(openSLES.inputBufferQueue, SL_IID_RECORD, &recordInterface);
135 | (*recordInterface)->SetRecordState(recordInterface, SL_RECORDSTATE_STOPPED);
136 |
137 | SLPlayItf outputPlayInterface;
138 | (*openSLES.outputBufferQueue)->GetInterface(openSLES.outputBufferQueue, SL_IID_PLAY, &outputPlayInterface);
139 | (*outputPlayInterface)->SetPlayState(outputPlayInterface, SL_PLAYSTATE_STOPPED);
140 |
141 | usleep(200000);
142 |
143 | (*openSLES.outputBufferQueue)->Destroy(openSLES.outputBufferQueue);
144 | (*openSLES.inputBufferQueue)->Destroy(openSLES.inputBufferQueue);
145 | (*openSLES.outputMix)->Destroy(openSLES.outputMix);
146 | (*openSLES.engine)->Destroy(openSLES.engine);
147 |
148 | for (int n = 0; n < NUMOPENSLESBUFFERS; n++) {
149 | free(openSLES.inputBuffers[n]);
150 | free(openSLES.outputBuffers[n]);
151 | }
152 | }
153 |
154 | #if HAS_AAUDIO == 1
155 | // ------
156 | // AAudio
157 | // ------
158 |
159 | static struct {
160 | AAudioStream *outputStream;
161 | AAudioStream *inputStream;
162 | bool firstAAudioInput, restarting;
163 | } aaudio;
164 |
165 | aaudio_data_callback_result_t aaudioProcessingCallback(__unused AAudioStream *stream, __unused void *userData, void *audioData, int32_t numFrames) {
166 | // Drain excess samples in input the first time.
167 | if (aaudio.firstAAudioInput) {
168 | aaudio.firstAAudioInput = false;
169 | aaudio_result_t drainedFrames = 0;
170 | do {
171 | drainedFrames = AAudioStream_read(aaudio.inputStream, audioData, numFrames, 0);
172 | } while (drainedFrames > 0);
173 | }
174 |
175 | if (numFrames > buffersize) buffersize = numFrames;
176 |
177 | aaudio_result_t frameCount = AAudioStream_read(aaudio.inputStream, audioData, numFrames, 0); // Read input.
178 |
179 | if (frameCount > 0) { // Has input.
180 | short int *audio = (short int *)audioData;
181 | measurer->processInput(audio, samplerate, frameCount);
182 | measurer->processOutput(audio);
183 |
184 | // If the input frames are less than the output frames. Should not happen.
185 | if (frameCount < numFrames) memset(audio + frameCount * 2, 0, size_t(numFrames - frameCount) * 4);
186 | } else memset(audioData, 0, (size_t)numFrames * 4); // No input, return with silence.
187 |
188 | return AAUDIO_CALLBACK_RESULT_CONTINUE;
189 | }
190 |
191 | static void *restartAAudioThread(__unused void *param);
192 |
193 | static void AAudioErrorCallback(AAudioStream *stream, __unused void *userData, aaudio_result_t error) {
194 | LOGI("%s aaudio stream error: %s", (AAudioStream_getDirection(stream) == AAUDIO_DIRECTION_OUTPUT) ? "output" : "input", AAudio_convertResultToText(error));
195 |
196 | if (AAudioStream_getState(stream) == AAUDIO_STREAM_STATE_DISCONNECTED) { // If the audio routing has been changed, restart audio I/O.
197 | if (aaudio.restarting) LOGI("Restarting already.");
198 | else {
199 | aaudio.restarting = true;
200 | pthread_t thread;
201 | pthread_create(&thread, NULL, restartAAudioThread, NULL);
202 | }
203 | }
204 | }
205 |
206 | static bool startAAudio() {
207 | hasAAudio = false;
208 | aaudio.firstAAudioInput = true;
209 | aaudio.inputStream = NULL;
210 | aaudio.outputStream = NULL;
211 |
212 | // Setup output.
213 | AAudioStreamBuilder *outputStreamBuilder;
214 | if (AAudio_createStreamBuilder(&outputStreamBuilder) != AAUDIO_OK) return false;
215 |
216 | AAudioStreamBuilder_setDirection(outputStreamBuilder, AAUDIO_DIRECTION_OUTPUT);
217 | AAudioStreamBuilder_setFormat(outputStreamBuilder, AAUDIO_FORMAT_PCM_I16);
218 | AAudioStreamBuilder_setChannelCount(outputStreamBuilder, 2);
219 | AAudioStreamBuilder_setSharingMode(outputStreamBuilder, AAUDIO_SHARING_MODE_EXCLUSIVE);
220 | AAudioStreamBuilder_setPerformanceMode(outputStreamBuilder, AAUDIO_PERFORMANCE_MODE_LOW_LATENCY);
221 | AAudioStreamBuilder_setErrorCallback(outputStreamBuilder, AAudioErrorCallback, NULL);
222 | AAudioStreamBuilder_setDataCallback(outputStreamBuilder, aaudioProcessingCallback, NULL);
223 |
224 | if ((AAudioStreamBuilder_openStream(outputStreamBuilder, &aaudio.outputStream) == AAUDIO_OK) && (aaudio.outputStream != NULL)) {
225 | samplerate = AAudioStream_getSampleRate(aaudio.outputStream);
226 | AAudioStream_setBufferSizeInFrames(aaudio.outputStream, AAudioStream_getFramesPerBurst(aaudio.outputStream));
227 | buffersize = AAudioStream_getBufferSizeInFrames(aaudio.outputStream);
228 | } else {
229 | AAudioStreamBuilder_delete(outputStreamBuilder);
230 | return false;
231 | }
232 |
233 | // Setup input.
234 | AAudioStreamBuilder *inputStreamBuilder;
235 | if (AAudio_createStreamBuilder(&inputStreamBuilder) != AAUDIO_OK) {
236 | AAudioStreamBuilder_delete(outputStreamBuilder);
237 | AAudioStream_close(aaudio.outputStream);
238 | return false;
239 | }
240 |
241 | AAudioStreamBuilder_setDirection(inputStreamBuilder, AAUDIO_DIRECTION_INPUT);
242 | AAudioStreamBuilder_setFormat(inputStreamBuilder, AAUDIO_FORMAT_PCM_I16);
243 | AAudioStreamBuilder_setChannelCount(inputStreamBuilder, 2);
244 | AAudioStreamBuilder_setSharingMode(inputStreamBuilder, AAUDIO_SHARING_MODE_EXCLUSIVE);
245 | AAudioStreamBuilder_setPerformanceMode(inputStreamBuilder, AAUDIO_PERFORMANCE_MODE_LOW_LATENCY);
246 | AAudioStreamBuilder_setErrorCallback(inputStreamBuilder, AAudioErrorCallback, NULL);
247 | AAudioStreamBuilder_setSampleRate(inputStreamBuilder, samplerate);
248 |
249 | if (!((AAudioStreamBuilder_openStream(inputStreamBuilder, &aaudio.inputStream) == AAUDIO_OK) && (aaudio.inputStream != NULL))) {
250 | AAudioStreamBuilder_delete(inputStreamBuilder);
251 | AAudioStreamBuilder_delete(outputStreamBuilder);
252 | AAudioStream_close(aaudio.outputStream);
253 | return false;
254 | }
255 |
256 | AAudioStreamBuilder_delete(inputStreamBuilder);
257 | AAudioStreamBuilder_delete(outputStreamBuilder);
258 |
259 | // Start audio I/O.
260 | bool success = (AAudioStream_requestStart(aaudio.outputStream) == AAUDIO_OK) && (AAudioStream_requestStart(aaudio.inputStream) == AAUDIO_OK);
261 | if (!success) {
262 | AAudioStream_close(aaudio.outputStream);
263 | AAudioStream_close(aaudio.inputStream);
264 | } else hasAAudio = true;
265 |
266 | aaudio.restarting = false;
267 | return success;
268 | }
269 |
270 | static void stopAAudio() {
271 | AAudioStream_requestStop(aaudio.outputStream);
272 | AAudioStream_requestStop(aaudio.inputStream);
273 | AAudioStream_close(aaudio.outputStream);
274 | AAudioStream_close(aaudio.inputStream);
275 | }
276 |
277 | // This is started by the error callback.
278 | static void *restartAAudioThread(__unused void *param) {
279 | LOGI("Restarting AAudio.");
280 | stopAAudio();
281 | usleep(200000);
282 | startAAudio();
283 | pthread_detach(pthread_self());
284 | pthread_exit(NULL);
285 | return NULL;
286 | }
287 |
288 | #endif
289 |
290 | // Ugly Java-native bridges - JNI, that is.
291 | extern "C" {
292 | JNIEXPORT void Java_com_superpowered_superpoweredlatency_MainActivity_SuperpoweredLatency(JNIEnv *javaEnvironment, jobject self, jlong samplerateFromJava, jlong buffersizeFromJava);
293 | JNIEXPORT void Java_com_superpowered_superpoweredlatency_MainActivity_toggleMeasurer(JNIEnv *javaEnvironment, jobject self, jboolean useAAudioIfAvailable);
294 | JNIEXPORT void Java_com_superpowered_superpoweredlatency_MainActivity_togglePassThrough(JNIEnv *javaEnvironment, jobject self);
295 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getState(JNIEnv *javaEnvironment, jobject self);
296 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getLatencyMs(JNIEnv *javaEnvironment, jobject self);
297 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getSamplerate(JNIEnv *javaEnvironment, jobject self);
298 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getBuffersize(JNIEnv *javaEnvironment, jobject self);
299 | JNIEXPORT jboolean Java_com_superpowered_superpoweredlatency_MainActivity_getAAudio(JNIEnv *javaEnvironment, jobject self);
300 | }
301 |
302 | JNIEXPORT void Java_com_superpowered_superpoweredlatency_MainActivity_toggleMeasurer(__unused JNIEnv *javaEnvironment, __unused jobject self, jboolean useAAudioIfAvailable) {
303 | measurer->toggle();
304 | isRunning = !isRunning;
305 | #if HAS_AAUDIO == 1
306 | if (isRunning) {
307 | if (useAAudioIfAvailable) {
308 | if (!startAAudio()) startOpenSLES(); // Use OpenSL ES if AAudio is not available.
309 | } else startOpenSLES();
310 | LOGI(hasAAudio ? "Using AAudio." : "Using OpenSL ES.");
311 | } else {
312 | if (hasAAudio) stopAAudio(); else stopOpenSLES();
313 | }
314 | #else
315 | if (isRunning) startOpenSLES(); else stopOpenSLES();
316 | #endif
317 | }
318 | JNIEXPORT void Java_com_superpowered_superpoweredlatency_MainActivity_togglePassThrough(__unused JNIEnv *javaEnvironment, __unused jobject self) { measurer->togglePassThrough(); }
319 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getState(__unused JNIEnv *javaEnvironment, __unused jobject self) { return measurer->state; }
320 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getLatencyMs(__unused JNIEnv *javaEnvironment, __unused jobject self) { return measurer->latencyMs; }
321 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getSamplerate(__unused JNIEnv *javaEnvironment, __unused jobject self) { return measurer->samplerate; }
322 | JNIEXPORT jint Java_com_superpowered_superpoweredlatency_MainActivity_getBuffersize(__unused JNIEnv *javaEnvironment, __unused jobject self) { return measurer->buffersize; }
323 | JNIEXPORT jboolean Java_com_superpowered_superpoweredlatency_MainActivity_getAAudio(__unused JNIEnv *javaEnvironment, __unused jobject self) { return (jboolean)hasAAudio; }
324 |
325 | // Set up audio and measurer.
326 | JNIEXPORT void Java_com_superpowered_superpoweredlatency_MainActivity_SuperpoweredLatency(__unused JNIEnv *javaEnvironment, __unused jobject self, jlong _samplerateFromJava, jlong _buffersizeFromJava) {
327 | openSLES.samplerateFromJava = (int)_samplerateFromJava;
328 | openSLES.buffersizeFromJava = (int)_buffersizeFromJava;
329 | measurer = new latencyMeasurer();
330 | }
331 |
--------------------------------------------------------------------------------
/Android/app/src/main/jni/latencyMeasurer.cpp:
--------------------------------------------------------------------------------
1 | #include "latencyMeasurer.h"
2 | #include
3 | #include
4 | #include
5 |
6 | /*
7 | Cross-platform class measuring round-trip audio latency.
8 | How one measurement step works:
9 |
10 | - Listen and measure the average loudness of the environment for 1 second.
11 | - Create a threshold value 24 decibels higher than the average loudness.
12 | - Begin playing a 1000 Hz sine wave and start counting the samples elapsed.
13 | - Stop counting and playing if the input's loudness is higher than the threshold, as the output wave is coming back (probably).
14 | - Divide the the elapsed samples with the sample rate to get the round-trip audio latency value in seconds.
15 | - We expect the threshold exceeded within 1 second. If it did not, then fail with error. Usually happens when the environment is too noisy (loud).
16 |
17 | How the measurement process works:
18 |
19 | - Perform 10 measurement steps.
20 | - Repeat every step until it returns without an error.
21 | - Store the results in an array of 10 floats.
22 | - After each step, check the minimum and maximum values.
23 | - If the maximum is higher than the minimum's double, stop the measurement process with an error. It indicates an unknown error, perhaps an unwanted noise happened. Double jitter (dispersion) is too high, an audio system can not be so bad.
24 | */
25 |
26 | // Returns with the absolute sum of the audio.
27 | static int sumAudio(short int *audio, int numberOfSamples) {
28 | int sum = 0;
29 | while (numberOfSamples) {
30 | numberOfSamples--;
31 | sum += abs(audio[0]) + abs(audio[1]);
32 | audio += 2;
33 | };
34 | return sum;
35 | }
36 |
37 | latencyMeasurer::latencyMeasurer() : measurementState(idle), nextMeasurementState(idle), samplesElapsed(0), sineWave(0), sum(0), threshold(0), state(0), samplerate(0), latencyMs(0), buffersize(0) {
38 | }
39 |
40 | void latencyMeasurer::toggle() {
41 | if ((state == -1) || ((state > 0) && (state < 11))) { // stop
42 | state = 0;
43 | nextMeasurementState = idle;
44 | } else { // start
45 | state = 1;
46 | samplerate = latencyMs = buffersize = 0;
47 | nextMeasurementState = measure_average_loudness_for_1_sec;
48 | };
49 | }
50 |
51 | void latencyMeasurer::togglePassThrough() {
52 | if (state != -1) {
53 | state = -1;
54 | nextMeasurementState = passthrough;
55 | } else {
56 | state = 0;
57 | nextMeasurementState = idle;
58 | };
59 | }
60 |
61 | void latencyMeasurer::processInput(short int *audio, int _samplerate, int numberOfSamples) {
62 | rampdec = -1.0f;
63 | samplerate = _samplerate;
64 | buffersize = numberOfSamples;
65 |
66 | if (nextMeasurementState != measurementState) {
67 | if (nextMeasurementState == measure_average_loudness_for_1_sec) samplesElapsed = 0;
68 | measurementState = nextMeasurementState;
69 | };
70 |
71 | switch (measurementState) {
72 | // Measuring average loudness for 1 second.
73 | case measure_average_loudness_for_1_sec:
74 | sum += sumAudio(audio, numberOfSamples);
75 | samplesElapsed += numberOfSamples;
76 |
77 | if (samplesElapsed >= samplerate) { // 1 second elapsed, set up the next step.
78 | // Look for an audio energy rise of 24 decibel.
79 | float averageAudioValue = (float(sum) / float(samplesElapsed >> 1)) / 32767.0f;
80 | float referenceDecibel = 20.0f * log10f(averageAudioValue) + 24.0f;
81 | threshold = (short int)(powf(10.0f, referenceDecibel / 20.0f) * 32767.0f);
82 |
83 | measurementState = nextMeasurementState = playing_and_listening;
84 | sineWave = 0;
85 | samplesElapsed = 0;
86 | sum = 0;
87 | };
88 | break;
89 |
90 | // Playing sine wave and listening if it comes back.
91 | case playing_and_listening: {
92 | int averageInputValue = sumAudio(audio, numberOfSamples) / numberOfSamples;
93 | rampdec = 0.0f;
94 |
95 | if (averageInputValue > threshold) { // The signal is above the threshold, so our sine wave comes back on the input.
96 | int n = 0;
97 | short int *input = audio;
98 | while (n < numberOfSamples) { // Check the location when it became loud enough.
99 | if (*input++ > threshold) break;
100 | if (*input++ > threshold) break;
101 | n++;
102 | };
103 | samplesElapsed += n; // Now we know the total round trip latency.
104 |
105 | if (samplesElapsed > numberOfSamples) { // Expect at least 1 buffer of round-trip latency.
106 | roundTripLatencyMs[state - 1] = float(samplesElapsed * 1000) / float(samplerate);
107 |
108 | float sum = 0, max = 0, min = 100000.0f;
109 | for (n = 0; n < state; n++) {
110 | if (roundTripLatencyMs[n] > max) max = roundTripLatencyMs[n];
111 | if (roundTripLatencyMs[n] < min) min = roundTripLatencyMs[n];
112 | sum += roundTripLatencyMs[n];
113 | };
114 |
115 | if (max / min > 2.0f) { // Dispersion error.
116 | latencyMs = 0;
117 | state = 10;
118 | measurementState = nextMeasurementState = idle;
119 | } else if (state == 10) { // Final result.
120 | latencyMs = int(sum * 0.1f);
121 | measurementState = nextMeasurementState = idle;
122 | } else { // Next step.
123 | latencyMs = (int)roundTripLatencyMs[state - 1];
124 | measurementState = nextMeasurementState = waiting;
125 | };
126 |
127 | state++;
128 | } else measurementState = nextMeasurementState = waiting; // Happens when an early noise comes in.
129 |
130 | rampdec = 1.0f / float(numberOfSamples);
131 | } else { // Still listening.
132 | samplesElapsed += numberOfSamples;
133 |
134 | // Do not listen to more than a second, let's start over. Maybe the environment's noise is too high.
135 | if (samplesElapsed > samplerate) {
136 | rampdec = 1.0f / float(numberOfSamples);
137 | measurementState = nextMeasurementState = waiting;
138 | latencyMs = -1;
139 | };
140 | };
141 | }; break;
142 |
143 | case passthrough:
144 | case idle: break;
145 |
146 | default: // Waiting 1 second.
147 | samplesElapsed += numberOfSamples;
148 |
149 | if (samplesElapsed > samplerate) { // 1 second elapsed, start over.
150 | samplesElapsed = 0;
151 | measurementState = nextMeasurementState = measure_average_loudness_for_1_sec;
152 | };
153 | };
154 | }
155 |
156 | void latencyMeasurer::processOutput(short int *audio) {
157 | if (measurementState == passthrough) return;
158 |
159 | if (rampdec < 0.0f) memset(audio, 0, (size_t)buffersize * 4); // Output silence.
160 | else { // Output sine wave.
161 | float ramp = 1.0f, mul = (2.0f * float(M_PI) * 1000.0f) / float(samplerate); // 1000 Hz
162 | int n = buffersize;
163 | while (n) {
164 | n--;
165 | audio[0] = audio[1] = (short int)(sinf(mul * sineWave) * ramp * 32767.0f);
166 | ramp -= rampdec;
167 | sineWave += 1.0f;
168 | audio += 2;
169 | };
170 | };
171 | }
172 |
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/Android/app/src/main/jni/latencyMeasurer.h:
--------------------------------------------------------------------------------
1 | #ifndef Header_latencyMeasurer
2 | #define Header_latencyMeasurer
3 |
4 | typedef enum measurementStates {
5 | measure_average_loudness_for_1_sec,
6 | playing_and_listening,
7 | waiting,
8 | passthrough,
9 | idle
10 | } measurementStates;
11 |
12 | class latencyMeasurer {
13 | public:
14 | int state; // -1: passthrough, 0: idle, 1..10 taking measurement steps, 11 finished
15 | int samplerate;
16 | int latencyMs;
17 | int buffersize;
18 |
19 | latencyMeasurer();
20 | void processInput(short int *audio, int samplerate, int numberOfSamples);
21 | void processOutput(short int *audio);
22 | void toggle();
23 | void togglePassThrough();
24 |
25 | private:
26 | measurementStates measurementState, nextMeasurementState;
27 | float roundTripLatencyMs[10], sineWave, rampdec;
28 | int sum, samplesElapsed;
29 | short int threshold;
30 | };
31 |
32 | #endif
33 |
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/Android/app/src/main/res/drawable-hdpi/ic_launcher.png:
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/Android/app/src/main/res/layout/activity_main.xml:
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/Android/app/src/main/res/menu/menu_main.xml:
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5 |
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/Android/app/src/main/res/values-w820dp/dimens.xml:
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1 |
2 |
5 | 64dp
6 |
7 |
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/Android/app/src/main/res/values/dimens.xml:
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1 |
2 |
3 | 0dp
4 | 0dp
5 |
6 |
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/Android/app/src/main/res/values/strings.xml:
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1 |
2 |
3 |
4 | Latency Test
5 | Superpowered Latency Test
6 | Before starting the total round-trip audio latency test, please do the following:\n\n1. Make sure you are in a quiet place.\n2. Check you have an active Internet connection.\n3. Set volume to near maximum.
7 | Settings
8 | Thank you. We\'ve uploaded the result to the latency benchmarking at:
9 |
10 |
11 |
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/Android/app/src/main/res/values/styles.xml:
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1 |
2 |
3 |
4 |
7 |
8 |
9 |
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/Android/app/src/main/res/xml/network_security_config.xml:
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1 |
2 |
3 |
4 | superpowered.com
5 |
6 |
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/Android/app/src/main/res/xml/preferences.xml:
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1 |
2 |
3 |
8 |
13 |
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/Android/build.gradle:
--------------------------------------------------------------------------------
1 | // Top-level build file where you can add configuration options common to all sub-projects/modules.
2 |
3 | buildscript {
4 |
5 | repositories {
6 | google()
7 | jcenter()
8 | }
9 | dependencies {
10 | classpath 'com.android.tools.build:gradle:7.2.2'
11 |
12 |
13 | // NOTE: Do not place your application dependencies here; they belong
14 | // in the individual module build.gradle files
15 | }
16 | }
17 |
18 | allprojects {
19 | repositories {
20 | google()
21 | jcenter()
22 | }
23 | }
24 |
25 | task clean(type: Delete) {
26 | delete rootProject.buildDir
27 | }
28 |
--------------------------------------------------------------------------------
/Android/gradle.properties:
--------------------------------------------------------------------------------
1 | # Project-wide Gradle settings.
2 |
3 | # IDE (e.g. Android Studio) users:
4 | # Gradle settings configured through the IDE *will override*
5 | # any settings specified in this file.
6 |
7 | # For more details on how to configure your build environment visit
8 | # http://www.gradle.org/docs/current/userguide/build_environment.html
9 |
10 | # Specifies the JVM arguments used for the daemon process.
11 | # The setting is particularly useful for tweaking memory settings.
12 | # Default value: -Xmx10248m -XX:MaxPermSize=256m
13 | # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
14 |
15 | # When configured, Gradle will run in incubating parallel mode.
16 | # This option should only be used with decoupled projects. More details, visit
17 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
18 | # org.gradle.parallel=true
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/Android/gradle/wrapper/gradle-wrapper.jar:
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/Android/gradle/wrapper/gradle-wrapper.properties:
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1 | #Wed Jan 04 14:17:27 CET 2023
2 | distributionBase=GRADLE_USER_HOME
3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
4 | distributionPath=wrapper/dists
5 | zipStorePath=wrapper/dists
6 | zipStoreBase=GRADLE_USER_HOME
7 |
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/Android/gradlew:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env bash
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
10 | DEFAULT_JVM_OPTS=""
11 |
12 | APP_NAME="Gradle"
13 | APP_BASE_NAME=`basename "$0"`
14 |
15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
16 | MAX_FD="maximum"
17 |
18 | warn ( ) {
19 | echo "$*"
20 | }
21 |
22 | die ( ) {
23 | echo
24 | echo "$*"
25 | echo
26 | exit 1
27 | }
28 |
29 | # OS specific support (must be 'true' or 'false').
30 | cygwin=false
31 | msys=false
32 | darwin=false
33 | case "`uname`" in
34 | CYGWIN* )
35 | cygwin=true
36 | ;;
37 | Darwin* )
38 | darwin=true
39 | ;;
40 | MINGW* )
41 | msys=true
42 | ;;
43 | esac
44 |
45 | # For Cygwin, ensure paths are in UNIX format before anything is touched.
46 | if $cygwin ; then
47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
48 | fi
49 |
50 | # Attempt to set APP_HOME
51 | # Resolve links: $0 may be a link
52 | PRG="$0"
53 | # Need this for relative symlinks.
54 | while [ -h "$PRG" ] ; do
55 | ls=`ls -ld "$PRG"`
56 | link=`expr "$ls" : '.*-> \(.*\)$'`
57 | if expr "$link" : '/.*' > /dev/null; then
58 | PRG="$link"
59 | else
60 | PRG=`dirname "$PRG"`"/$link"
61 | fi
62 | done
63 | SAVED="`pwd`"
64 | cd "`dirname \"$PRG\"`/" >&-
65 | APP_HOME="`pwd -P`"
66 | cd "$SAVED" >&-
67 |
68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
69 |
70 | # Determine the Java command to use to start the JVM.
71 | if [ -n "$JAVA_HOME" ] ; then
72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
73 | # IBM's JDK on AIX uses strange locations for the executables
74 | JAVACMD="$JAVA_HOME/jre/sh/java"
75 | else
76 | JAVACMD="$JAVA_HOME/bin/java"
77 | fi
78 | if [ ! -x "$JAVACMD" ] ; then
79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
80 |
81 | Please set the JAVA_HOME variable in your environment to match the
82 | location of your Java installation."
83 | fi
84 | else
85 | JAVACMD="java"
86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
87 |
88 | Please set the JAVA_HOME variable in your environment to match the
89 | location of your Java installation."
90 | fi
91 |
92 | # Increase the maximum file descriptors if we can.
93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
94 | MAX_FD_LIMIT=`ulimit -H -n`
95 | if [ $? -eq 0 ] ; then
96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
97 | MAX_FD="$MAX_FD_LIMIT"
98 | fi
99 | ulimit -n $MAX_FD
100 | if [ $? -ne 0 ] ; then
101 | warn "Could not set maximum file descriptor limit: $MAX_FD"
102 | fi
103 | else
104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
105 | fi
106 | fi
107 |
108 | # For Darwin, add options to specify how the application appears in the dock
109 | if $darwin; then
110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
111 | fi
112 |
113 | # For Cygwin, switch paths to Windows format before running java
114 | if $cygwin ; then
115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
158 | function splitJvmOpts() {
159 | JVM_OPTS=("$@")
160 | }
161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
163 |
164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
165 |
--------------------------------------------------------------------------------
/Android/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
--------------------------------------------------------------------------------
/Android/settings.gradle:
--------------------------------------------------------------------------------
1 | include ':app'
2 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | GNU GENERAL PUBLIC LICENSE
2 | Version 2, June 1991
3 |
4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
6 | Everyone is permitted to copy and distribute verbatim copies
7 | of this license document, but changing it is not allowed.
8 |
9 | Preamble
10 |
11 | The licenses for most software are designed to take away your
12 | freedom to share and change it. By contrast, the GNU General Public
13 | License is intended to guarantee your freedom to share and change free
14 | software--to make sure the software is free for all its users. This
15 | General Public License applies to most of the Free Software
16 | Foundation's software and to any other program whose authors commit to
17 | using it. (Some other Free Software Foundation software is covered by
18 | the GNU Lesser General Public License instead.) You can apply it to
19 | your programs, too.
20 |
21 | When we speak of free software, we are referring to freedom, not
22 | price. Our General Public Licenses are designed to make sure that you
23 | have the freedom to distribute copies of free software (and charge for
24 | this service if you wish), that you receive source code or can get it
25 | if you want it, that you can change the software or use pieces of it
26 | in new free programs; and that you know you can do these things.
27 |
28 | To protect your rights, we need to make restrictions that forbid
29 | anyone to deny you these rights or to ask you to surrender the rights.
30 | These restrictions translate to certain responsibilities for you if you
31 | distribute copies of the software, or if you modify it.
32 |
33 | For example, if you distribute copies of such a program, whether
34 | gratis or for a fee, you must give the recipients all the rights that
35 | you have. You must make sure that they, too, receive or can get the
36 | source code. And you must show them these terms so they know their
37 | rights.
38 |
39 | We protect your rights with two steps: (1) copyright the software, and
40 | (2) offer you this license which gives you legal permission to copy,
41 | distribute and/or modify the software.
42 |
43 | Also, for each author's protection and ours, we want to make certain
44 | that everyone understands that there is no warranty for this free
45 | software. If the software is modified by someone else and passed on, we
46 | want its recipients to know that what they have is not the original, so
47 | that any problems introduced by others will not reflect on the original
48 | authors' reputations.
49 |
50 | Finally, any free program is threatened constantly by software
51 | patents. We wish to avoid the danger that redistributors of a free
52 | program will individually obtain patent licenses, in effect making the
53 | program proprietary. To prevent this, we have made it clear that any
54 | patent must be licensed for everyone's free use or not licensed at all.
55 |
56 | The precise terms and conditions for copying, distribution and
57 | modification follow.
58 |
59 | GNU GENERAL PUBLIC LICENSE
60 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
61 |
62 | 0. This License applies to any program or other work which contains
63 | a notice placed by the copyright holder saying it may be distributed
64 | under the terms of this General Public License. The "Program", below,
65 | refers to any such program or work, and a "work based on the Program"
66 | means either the Program or any derivative work under copyright law:
67 | that is to say, a work containing the Program or a portion of it,
68 | either verbatim or with modifications and/or translated into another
69 | language. (Hereinafter, translation is included without limitation in
70 | the term "modification".) Each licensee is addressed as "you".
71 |
72 | Activities other than copying, distribution and modification are not
73 | covered by this License; they are outside its scope. The act of
74 | running the Program is not restricted, and the output from the Program
75 | is covered only if its contents constitute a work based on the
76 | Program (independent of having been made by running the Program).
77 | Whether that is true depends on what the Program does.
78 |
79 | 1. You may copy and distribute verbatim copies of the Program's
80 | source code as you receive it, in any medium, provided that you
81 | conspicuously and appropriately publish on each copy an appropriate
82 | copyright notice and disclaimer of warranty; keep intact all the
83 | notices that refer to this License and to the absence of any warranty;
84 | and give any other recipients of the Program a copy of this License
85 | along with the Program.
86 |
87 | You may charge a fee for the physical act of transferring a copy, and
88 | you may at your option offer warranty protection in exchange for a fee.
89 |
90 | 2. You may modify your copy or copies of the Program or any portion
91 | of it, thus forming a work based on the Program, and copy and
92 | distribute such modifications or work under the terms of Section 1
93 | above, provided that you also meet all of these conditions:
94 |
95 | a) You must cause the modified files to carry prominent notices
96 | stating that you changed the files and the date of any change.
97 |
98 | b) You must cause any work that you distribute or publish, that in
99 | whole or in part contains or is derived from the Program or any
100 | part thereof, to be licensed as a whole at no charge to all third
101 | parties under the terms of this License.
102 |
103 | c) If the modified program normally reads commands interactively
104 | when run, you must cause it, when started running for such
105 | interactive use in the most ordinary way, to print or display an
106 | announcement including an appropriate copyright notice and a
107 | notice that there is no warranty (or else, saying that you provide
108 | a warranty) and that users may redistribute the program under
109 | these conditions, and telling the user how to view a copy of this
110 | License. (Exception: if the Program itself is interactive but
111 | does not normally print such an announcement, your work based on
112 | the Program is not required to print an announcement.)
113 |
114 | These requirements apply to the modified work as a whole. If
115 | identifiable sections of that work are not derived from the Program,
116 | and can be reasonably considered independent and separate works in
117 | themselves, then this License, and its terms, do not apply to those
118 | sections when you distribute them as separate works. But when you
119 | distribute the same sections as part of a whole which is a work based
120 | on the Program, the distribution of the whole must be on the terms of
121 | this License, whose permissions for other licensees extend to the
122 | entire whole, and thus to each and every part regardless of who wrote it.
123 |
124 | Thus, it is not the intent of this section to claim rights or contest
125 | your rights to work written entirely by you; rather, the intent is to
126 | exercise the right to control the distribution of derivative or
127 | collective works based on the Program.
128 |
129 | In addition, mere aggregation of another work not based on the Program
130 | with the Program (or with a work based on the Program) on a volume of
131 | a storage or distribution medium does not bring the other work under
132 | the scope of this License.
133 |
134 | 3. You may copy and distribute the Program (or a work based on it,
135 | under Section 2) in object code or executable form under the terms of
136 | Sections 1 and 2 above provided that you also do one of the following:
137 |
138 | a) Accompany it with the complete corresponding machine-readable
139 | source code, which must be distributed under the terms of Sections
140 | 1 and 2 above on a medium customarily used for software interchange; or,
141 |
142 | b) Accompany it with a written offer, valid for at least three
143 | years, to give any third party, for a charge no more than your
144 | cost of physically performing source distribution, a complete
145 | machine-readable copy of the corresponding source code, to be
146 | distributed under the terms of Sections 1 and 2 above on a medium
147 | customarily used for software interchange; or,
148 |
149 | c) Accompany it with the information you received as to the offer
150 | to distribute corresponding source code. (This alternative is
151 | allowed only for noncommercial distribution and only if you
152 | received the program in object code or executable form with such
153 | an offer, in accord with Subsection b above.)
154 |
155 | The source code for a work means the preferred form of the work for
156 | making modifications to it. For an executable work, complete source
157 | code means all the source code for all modules it contains, plus any
158 | associated interface definition files, plus the scripts used to
159 | control compilation and installation of the executable. However, as a
160 | special exception, the source code distributed need not include
161 | anything that is normally distributed (in either source or binary
162 | form) with the major components (compiler, kernel, and so on) of the
163 | operating system on which the executable runs, unless that component
164 | itself accompanies the executable.
165 |
166 | If distribution of executable or object code is made by offering
167 | access to copy from a designated place, then offering equivalent
168 | access to copy the source code from the same place counts as
169 | distribution of the source code, even though third parties are not
170 | compelled to copy the source along with the object code.
171 |
172 | 4. You may not copy, modify, sublicense, or distribute the Program
173 | except as expressly provided under this License. Any attempt
174 | otherwise to copy, modify, sublicense or distribute the Program is
175 | void, and will automatically terminate your rights under this License.
176 | However, parties who have received copies, or rights, from you under
177 | this License will not have their licenses terminated so long as such
178 | parties remain in full compliance.
179 |
180 | 5. You are not required to accept this License, since you have not
181 | signed it. However, nothing else grants you permission to modify or
182 | distribute the Program or its derivative works. These actions are
183 | prohibited by law if you do not accept this License. Therefore, by
184 | modifying or distributing the Program (or any work based on the
185 | Program), you indicate your acceptance of this License to do so, and
186 | all its terms and conditions for copying, distributing or modifying
187 | the Program or works based on it.
188 |
189 | 6. Each time you redistribute the Program (or any work based on the
190 | Program), the recipient automatically receives a license from the
191 | original licensor to copy, distribute or modify the Program subject to
192 | these terms and conditions. You may not impose any further
193 | restrictions on the recipients' exercise of the rights granted herein.
194 | You are not responsible for enforcing compliance by third parties to
195 | this License.
196 |
197 | 7. If, as a consequence of a court judgment or allegation of patent
198 | infringement or for any other reason (not limited to patent issues),
199 | conditions are imposed on you (whether by court order, agreement or
200 | otherwise) that contradict the conditions of this License, they do not
201 | excuse you from the conditions of this License. If you cannot
202 | distribute so as to satisfy simultaneously your obligations under this
203 | License and any other pertinent obligations, then as a consequence you
204 | may not distribute the Program at all. For example, if a patent
205 | license would not permit royalty-free redistribution of the Program by
206 | all those who receive copies directly or indirectly through you, then
207 | the only way you could satisfy both it and this License would be to
208 | refrain entirely from distribution of the Program.
209 |
210 | If any portion of this section is held invalid or unenforceable under
211 | any particular circumstance, the balance of the section is intended to
212 | apply and the section as a whole is intended to apply in other
213 | circumstances.
214 |
215 | It is not the purpose of this section to induce you to infringe any
216 | patents or other property right claims or to contest validity of any
217 | such claims; this section has the sole purpose of protecting the
218 | integrity of the free software distribution system, which is
219 | implemented by public license practices. Many people have made
220 | generous contributions to the wide range of software distributed
221 | through that system in reliance on consistent application of that
222 | system; it is up to the author/donor to decide if he or she is willing
223 | to distribute software through any other system and a licensee cannot
224 | impose that choice.
225 |
226 | This section is intended to make thoroughly clear what is believed to
227 | be a consequence of the rest of this License.
228 |
229 | 8. If the distribution and/or use of the Program is restricted in
230 | certain countries either by patents or by copyrighted interfaces, the
231 | original copyright holder who places the Program under this License
232 | may add an explicit geographical distribution limitation excluding
233 | those countries, so that distribution is permitted only in or among
234 | countries not thus excluded. In such case, this License incorporates
235 | the limitation as if written in the body of this License.
236 |
237 | 9. The Free Software Foundation may publish revised and/or new versions
238 | of the General Public License from time to time. Such new versions will
239 | be similar in spirit to the present version, but may differ in detail to
240 | address new problems or concerns.
241 |
242 | Each version is given a distinguishing version number. If the Program
243 | specifies a version number of this License which applies to it and "any
244 | later version", you have the option of following the terms and conditions
245 | either of that version or of any later version published by the Free
246 | Software Foundation. If the Program does not specify a version number of
247 | this License, you may choose any version ever published by the Free Software
248 | Foundation.
249 |
250 | 10. If you wish to incorporate parts of the Program into other free
251 | programs whose distribution conditions are different, write to the author
252 | to ask for permission. For software which is copyrighted by the Free
253 | Software Foundation, write to the Free Software Foundation; we sometimes
254 | make exceptions for this. Our decision will be guided by the two goals
255 | of preserving the free status of all derivatives of our free software and
256 | of promoting the sharing and reuse of software generally.
257 |
258 | NO WARRANTY
259 |
260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
268 | REPAIR OR CORRECTION.
269 |
270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
278 | POSSIBILITY OF SUCH DAMAGES.
279 |
280 | END OF TERMS AND CONDITIONS
281 |
282 | How to Apply These Terms to Your New Programs
283 |
284 | If you develop a new program, and you want it to be of the greatest
285 | possible use to the public, the best way to achieve this is to make it
286 | free software which everyone can redistribute and change under these terms.
287 |
288 | To do so, attach the following notices to the program. It is safest
289 | to attach them to the start of each source file to most effectively
290 | convey the exclusion of warranty; and each file should have at least
291 | the "copyright" line and a pointer to where the full notice is found.
292 |
293 | {description}
294 | Copyright (C) {year} {fullname}
295 |
296 | This program is free software; you can redistribute it and/or modify
297 | it under the terms of the GNU General Public License as published by
298 | the Free Software Foundation; either version 2 of the License, or
299 | (at your option) any later version.
300 |
301 | This program is distributed in the hope that it will be useful,
302 | but WITHOUT ANY WARRANTY; without even the implied warranty of
303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
304 | GNU General Public License for more details.
305 |
306 | You should have received a copy of the GNU General Public License along
307 | with this program; if not, write to the Free Software Foundation, Inc.,
308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
309 |
310 | Also add information on how to contact you by electronic and paper mail.
311 |
312 | If the program is interactive, make it output a short notice like this
313 | when it starts in an interactive mode:
314 |
315 | Gnomovision version 69, Copyright (C) year name of author
316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
317 | This is free software, and you are welcome to redistribute it
318 | under certain conditions; type `show c' for details.
319 |
320 | The hypothetical commands `show w' and `show c' should show the appropriate
321 | parts of the General Public License. Of course, the commands you use may
322 | be called something other than `show w' and `show c'; they could even be
323 | mouse-clicks or menu items--whatever suits your program.
324 |
325 | You should also get your employer (if you work as a programmer) or your
326 | school, if any, to sign a "copyright disclaimer" for the program, if
327 | necessary. Here is a sample; alter the names:
328 |
329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program
330 | `Gnomovision' (which makes passes at compilers) written by James Hacker.
331 |
332 | {signature of Ty Coon}, 1 April 1989
333 | Ty Coon, President of Vice
334 |
335 | This General Public License does not permit incorporating your program into
336 | proprietary programs. If your program is a subroutine library, you may
337 | consider it more useful to permit linking proprietary applications with the
338 | library. If this is what you want to do, use the GNU Lesser General
339 | Public License instead of this License.
340 |
341 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | This application measures round-trip audio latency on an iOS or Android device.
2 |
3 | Low round-trip audio latency is a strong indicator of how well any mobile device is optimized for professional audio.
4 | Lower latency confers significant benefits to users of all sorts of apps like games, augmented hearing apps, VOIP and other interactive apps.
5 | Read more: http://superpowered.com/latency
6 |
7 | The core of this app is a cross-platform class under: Android/app/src/main/jni/latencyMeasurer.cpp
8 |
--------------------------------------------------------------------------------
/iOS/AppDelegate.h:
--------------------------------------------------------------------------------
1 | #import
2 |
3 | @interface AppDelegate: UIResponder
4 |
5 | @property (strong, nonatomic) UIWindow *window;
6 |
7 | @end
8 |
--------------------------------------------------------------------------------
/iOS/AppDelegate.m:
--------------------------------------------------------------------------------
1 | #import "AppDelegate.h"
2 |
3 | @implementation AppDelegate
4 |
5 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
6 | return YES;
7 | }
8 |
9 | - (void)applicationWillResignActive:(UIApplication *)application {}
10 |
11 | - (void)applicationDidEnterBackground:(UIApplication *)application {}
12 |
13 | - (void)applicationWillEnterForeground:(UIApplication *)application {}
14 |
15 | - (void)applicationDidBecomeActive:(UIApplication *)application {}
16 |
17 | - (void)applicationWillTerminate:(UIApplication *)application {}
18 |
19 | @end
20 |
--------------------------------------------------------------------------------
/iOS/Assets.xcassets/AccentColor.colorset/Contents.json:
--------------------------------------------------------------------------------
1 | {
2 | "colors" : [
3 | {
4 | "idiom" : "universal"
5 | }
6 | ],
7 | "info" : {
8 | "author" : "xcode",
9 | "version" : 1
10 | }
11 | }
12 |
--------------------------------------------------------------------------------
/iOS/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
1 | {
2 | "images" : [
3 | {
4 | "filename" : "Icon-40.png",
5 | "idiom" : "iphone",
6 | "scale" : "2x",
7 | "size" : "20x20"
8 | },
9 | {
10 | "filename" : "Icon-60.png",
11 | "idiom" : "iphone",
12 | "scale" : "3x",
13 | "size" : "20x20"
14 | },
15 | {
16 | "filename" : "Icon-58.png",
17 | "idiom" : "iphone",
18 | "scale" : "2x",
19 | "size" : "29x29"
20 | },
21 | {
22 | "filename" : "Icon-87.png",
23 | "idiom" : "iphone",
24 | "scale" : "3x",
25 | "size" : "29x29"
26 | },
27 | {
28 | "filename" : "Icon-80.png",
29 | "idiom" : "iphone",
30 | "scale" : "2x",
31 | "size" : "40x40"
32 | },
33 | {
34 | "filename" : "Icon-120.png",
35 | "idiom" : "iphone",
36 | "scale" : "3x",
37 | "size" : "40x40"
38 | },
39 | {
40 | "filename" : "Icon-120 1.png",
41 | "idiom" : "iphone",
42 | "scale" : "2x",
43 | "size" : "60x60"
44 | },
45 | {
46 | "filename" : "Icon-180.png",
47 | "idiom" : "iphone",
48 | "scale" : "3x",
49 | "size" : "60x60"
50 | },
51 | {
52 | "filename" : "Icon-20.png",
53 | "idiom" : "ipad",
54 | "scale" : "1x",
55 | "size" : "20x20"
56 | },
57 | {
58 | "filename" : "Icon-40 1.png",
59 | "idiom" : "ipad",
60 | "scale" : "2x",
61 | "size" : "20x20"
62 | },
63 | {
64 | "filename" : "Icon-29.png",
65 | "idiom" : "ipad",
66 | "scale" : "1x",
67 | "size" : "29x29"
68 | },
69 | {
70 | "filename" : "Icon-58 1.png",
71 | "idiom" : "ipad",
72 | "scale" : "2x",
73 | "size" : "29x29"
74 | },
75 | {
76 | "filename" : "Icon-40 2.png",
77 | "idiom" : "ipad",
78 | "scale" : "1x",
79 | "size" : "40x40"
80 | },
81 | {
82 | "filename" : "Icon-80 1.png",
83 | "idiom" : "ipad",
84 | "scale" : "2x",
85 | "size" : "40x40"
86 | },
87 | {
88 | "filename" : "Icon-76.png",
89 | "idiom" : "ipad",
90 | "scale" : "1x",
91 | "size" : "76x76"
92 | },
93 | {
94 | "filename" : "Icon-152.png",
95 | "idiom" : "ipad",
96 | "scale" : "2x",
97 | "size" : "76x76"
98 | },
99 | {
100 | "filename" : "Icon-167.png",
101 | "idiom" : "ipad",
102 | "scale" : "2x",
103 | "size" : "83.5x83.5"
104 | },
105 | {
106 | "filename" : "Icon-1024.png",
107 | "idiom" : "ios-marketing",
108 | "scale" : "1x",
109 | "size" : "1024x1024"
110 | },
111 | {
112 | "filename" : "Icon-16.png",
113 | "idiom" : "mac",
114 | "scale" : "1x",
115 | "size" : "16x16"
116 | },
117 | {
118 | "filename" : "Icon-32.png",
119 | "idiom" : "mac",
120 | "scale" : "2x",
121 | "size" : "16x16"
122 | },
123 | {
124 | "filename" : "Icon-32 1.png",
125 | "idiom" : "mac",
126 | "scale" : "1x",
127 | "size" : "32x32"
128 | },
129 | {
130 | "filename" : "Icon-64.png",
131 | "idiom" : "mac",
132 | "scale" : "2x",
133 | "size" : "32x32"
134 | },
135 | {
136 | "filename" : "Icon-128.png",
137 | "idiom" : "mac",
138 | "scale" : "1x",
139 | "size" : "128x128"
140 | },
141 | {
142 | "filename" : "Icon-256.png",
143 | "idiom" : "mac",
144 | "scale" : "2x",
145 | "size" : "128x128"
146 | },
147 | {
148 | "filename" : "Icon-256 1.png",
149 | "idiom" : "mac",
150 | "scale" : "1x",
151 | "size" : "256x256"
152 | },
153 | {
154 | "filename" : "Icon-512.png",
155 | "idiom" : "mac",
156 | "scale" : "2x",
157 | "size" : "256x256"
158 | },
159 | {
160 | "filename" : "Icon-512 1.png",
161 | "idiom" : "mac",
162 | "scale" : "1x",
163 | "size" : "512x512"
164 | },
165 | {
166 | "filename" : "Icon-1024 1.png",
167 | "idiom" : "mac",
168 | "scale" : "2x",
169 | "size" : "512x512"
170 | }
171 | ],
172 | "info" : {
173 | "author" : "xcode",
174 | "version" : 1
175 | }
176 | }
177 |
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1 | {
2 | "info" : {
3 | "author" : "xcode",
4 | "version" : 1
5 | }
6 | }
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5 | "size" : "20x20",
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1 |
2 |
3 |
4 |
5 | CFBundleDevelopmentRegion
6 | en
7 | CFBundleExecutable
8 | $(EXECUTABLE_NAME)
9 | CFBundleIdentifier
10 | $(PRODUCT_BUNDLE_IDENTIFIER)
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12 | 6.0
13 | CFBundleName
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15 | CFBundlePackageType
16 | APPL
17 | CFBundleShortVersionString
18 | 1.3
19 | CFBundleSignature
20 | ????
21 | CFBundleVersion
22 | 1
23 | LSRequiresIPhoneOS
24 |
25 | NSAppTransportSecurity
26 |
27 | NSAllowsArbitraryLoads
28 |
29 |
30 | NSMicrophoneUsageDescription
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32 | UIBackgroundModes
33 |
34 | audio
35 |
36 | UILaunchStoryboardName
37 | Main
38 | UIMainStoryboardFile
39 | Main
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54 |
55 | UIUserInterfaceStyle
56 | Light
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58 | AppIcon
59 |
60 |
61 |
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/iOS/ViewController.h:
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1 | #import
2 |
3 | @interface ViewController: UIViewController
4 |
5 | @property (nonatomic, retain) IBOutlet UILabel *mainTitle;
6 | @property (nonatomic, retain) IBOutlet UILabel *model;
7 | @property (nonatomic, retain) IBOutlet UILabel *os;
8 |
9 | @property (nonatomic, retain) IBOutlet UIView *info;
10 |
11 | @property (nonatomic, retain) IBOutlet UIView *status;
12 | @property (nonatomic, retain) IBOutlet UILabel *statusMessage;
13 | @property (nonatomic, retain) IBOutlet UIPageControl *progress;
14 |
15 | @property (nonatomic, retain) IBOutlet UIView *results;
16 | @property (nonatomic, retain) IBOutlet UILabel *latency;
17 | @property (nonatomic, retain) IBOutlet UILabel *bufferSize;
18 | @property (nonatomic, retain) IBOutlet UILabel *sampleRate;
19 | @property (nonatomic, retain) IBOutlet UILabel *network;
20 | @property (nonatomic, retain) IBOutlet UILabel *website;
21 |
22 | @property (nonatomic, retain) IBOutlet UILabel *button;
23 | @property (nonatomic, retain) IBOutlet UIImageView *superpowered;
24 |
25 | @end
26 |
--------------------------------------------------------------------------------
/iOS/ViewController.mm:
--------------------------------------------------------------------------------
1 | #import "ViewController.h"
2 | #import
3 | #import
4 | #import
5 | #import
6 | #include "latencyMeasurer.h"
7 | #include
8 | #include "machines.h"
9 |
10 | @implementation ViewController {
11 | AudioUnit au;
12 | latencyMeasurer *measurer;
13 | int samplerate, measurerState;
14 | CADisplayLink *displayLink;
15 | }
16 |
17 | @synthesize mainTitle, model, os, info, status, statusMessage, progress, results, latency, bufferSize, sampleRate, network, button, website, superpowered;
18 |
19 | // When the user taps on the main button.
20 | - (IBAction)onButton:(id)sender {
21 | if (!results.hidden) {
22 | UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"Share Results" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Twitter", @"Facebook", @"Email", nil];
23 | [sheet showInView:self.view];
24 | } else if (measurer) {
25 | measurer->toggle();
26 | button.text = (measurer->state > 0) ? @"Start Latency Test" : @"Cancel";
27 | };
28 | }
29 |
30 | // Encodes safe strings for network transfer.
31 | static NSString *encodedString(NSString *str) {
32 | return (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[[str dataUsingEncoding:NSUTF8StringEncoding] base64EncodedStringWithOptions:0], NULL, (CFStringRef)@"!*'();:@&=+$,/?%#[]", kCFStringEncodingASCII));
33 | }
34 |
35 | // Called periodically to update the UI.
36 | - (void)UI_update {
37 | if ((measurerState != measurer->state) || (measurer->latencyMs < 0)) { // Update the UI if the measurer's state has been changed.
38 | measurerState = measurer->state;
39 |
40 | // Idle state.
41 | if (measurerState == 0) {
42 | info.hidden = NO;
43 | results.hidden = status.hidden = YES;
44 | button.text = @"Start Latency Test";
45 |
46 | // Result or error.
47 | } else if (measurerState > 10) {
48 | if (measurer->latencyMs == 0) {
49 | statusMessage.text = @"Dispersion too big, please try again.";
50 | button.text = @"Restart Test";
51 | } else {
52 | info.hidden = status.hidden = website.hidden = YES;
53 | results.hidden = NO;
54 | latency.text = [NSString stringWithFormat:@"%i ms", measurer->latencyMs];
55 | bufferSize.text = [NSString stringWithFormat:@"%i", measurer->buffersize];
56 | sampleRate.text = [NSString stringWithFormat:@"%i Hz", measurer->samplerate];
57 | network.text = @"Uploading data...";
58 | button.text = @"Share Results";
59 |
60 | // Uploading the result to our server.
61 | NSString *url = [NSString stringWithFormat:@"http://superpowered.com/latencydata/input.php?ms=%i&samplerate=%i&buffersize=%i&model=%@&os=%@&build=0", measurer->latencyMs, measurer->samplerate, measurer->buffersize, encodedString(model.text), encodedString([[UIDevice currentDevice] systemVersion])];
62 | NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30];
63 | [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
64 | if (error) {
65 | self.network.text = [error localizedDescription];
66 | } else if ([data length] == 2) {
67 | self.network.text = @"Thank you. We've uploaded the result to the latency benchmarking at:";
68 | self.website.hidden = NO;
69 | } else {
70 | self.network.text = @"Network error.";
71 | }
72 | }];
73 | };
74 |
75 | // Measurement starts.
76 | } else if (measurerState == 1) {
77 | status.hidden = NO;
78 | results.hidden = info.hidden = YES;
79 | statusMessage.text = @"? ms";
80 | progress.currentPage = 0;
81 | button.text = @"Cancel";
82 |
83 | // Measurement in progress.
84 | } else {
85 | if (measurer->latencyMs < 0) statusMessage.text = @"The environment is too loud!";
86 | else {
87 | statusMessage.text = [NSString stringWithFormat:@"%i ms", measurer->latencyMs];
88 | progress.currentPage = measurerState - 1;
89 | };
90 | };
91 | };
92 | }
93 |
94 | // Called periodically for audio input/output.
95 | static OSStatus audioProcessingCallback(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData) {
96 | ViewController *self = (__bridge ViewController *)inRefCon;
97 |
98 | if (self->samplerate > 0) {
99 | // Get input samples.
100 | AudioUnitRender(self->au, ioActionFlags, inTimeStamp, 1, inNumberFrames, ioData);
101 |
102 | // Process audio. The reason for a separate input and output process is Android.
103 | // We are measuring with the same code on both iOS and Android, where the input and output must be processed separately.
104 | self->measurer->processInput((short int *)ioData->mBuffers[0].mData, self->samplerate, inNumberFrames);
105 | self->measurer->processOutput((short int *)ioData->mBuffers[0].mData);
106 | };
107 |
108 | return noErr;
109 | }
110 |
111 | // Called when the stream format has been changed. Let's read the current samplerate.
112 | static void streamFormatChangedCallback(void *inRefCon, AudioUnit inUnit, AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement) {
113 | if ((inScope == kAudioUnitScope_Output) && (inElement == 0)) {
114 | // Read the current sample rate.
115 | UInt32 size = 0;
116 | AudioUnitGetPropertyInfo(inUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, &size, NULL);
117 | AudioStreamBasicDescription format;
118 | AudioUnitGetProperty(inUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, &format, &size);
119 |
120 | ViewController *self = (__bridge ViewController *)inRefCon;
121 | self->samplerate = (int)format.mSampleRate;
122 | };
123 | }
124 |
125 | // Setup everything.
126 | - (void)viewDidLoad {
127 | [super viewDidLoad];
128 | mainTitle.text = [NSString stringWithFormat:@"Superpowered Latency Test v%@", [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"]];
129 | if ([[AVAudioSession sharedInstance] respondsToSelector:@selector(recordPermission)] && [[AVAudioSession sharedInstance] respondsToSelector:@selector(requestRecordPermission:)] && ([[AVAudioSession sharedInstance] recordPermission] != AVAudioSessionRecordPermissionGranted)) {
130 | [[AVAudioSession sharedInstance] requestRecordPermission:^(BOOL granted) {
131 | if (granted) {
132 | dispatch_async(dispatch_get_main_queue(), ^{
133 | [self finishLoading];
134 | });
135 | }
136 | }];
137 | } else [self finishLoading];
138 | }
139 |
140 | - (void)finishLoading {
141 | measurerState = -1000;
142 | measurer = new latencyMeasurer();
143 |
144 | // Set up the audio session. Prefer 48 kHz and 64 samples.
145 | [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker error:NULL];
146 | // Default mode adds 30 ms of additional latency for the built-in microphone on iOS devices from the first iPad Air.
147 | [[AVAudioSession sharedInstance] setMode:AVAudioSessionModeMeasurement error:NULL];
148 | [[AVAudioSession sharedInstance] setPreferredSampleRate:48000 error:NULL];
149 | [[AVAudioSession sharedInstance] setPreferredIOBufferDuration:64.0 / 48000.0 error:NULL];
150 | [[AVAudioSession sharedInstance] setActive:YES error:NULL];
151 | //[[AVAudioSession sharedInstance] overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:nil];
152 |
153 | // Set up the RemoteIO audio input/output unit.
154 | AudioComponentDescription desc;
155 | desc.componentType = kAudioUnitType_Output;
156 | desc.componentSubType = kAudioUnitSubType_RemoteIO;
157 | desc.componentFlags = 0;
158 | desc.componentFlagsMask = 0;
159 | desc.componentManufacturer = kAudioUnitManufacturer_Apple;
160 | AudioComponent component = AudioComponentFindNext(NULL, &desc);
161 | if (AudioComponentInstanceNew(component, &au) != 0) abort();
162 |
163 | UInt32 value = 1;
164 | if (AudioUnitSetProperty(au, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output, 0, &value, sizeof(value))) abort();
165 | value = 1;
166 | if (AudioUnitSetProperty(au, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, &value, sizeof(value))) abort();
167 |
168 | AudioUnitAddPropertyListener(au, kAudioUnitProperty_StreamFormat, streamFormatChangedCallback, (__bridge void *)self);
169 |
170 | // 16-bit interleaved stereo PCM. While the native audio format is different, conversion does not add any latency (just some CPU).
171 | AudioStreamBasicDescription format;
172 | format.mSampleRate = 0;
173 | format.mFormatID = kAudioFormatLinearPCM;
174 | format.mFormatFlags = kAudioFormatFlagIsSignedInteger;
175 | format.mBitsPerChannel = 16;
176 | format.mFramesPerPacket = 1;
177 | format.mBytesPerFrame = 4;
178 | format.mBytesPerPacket = 4;
179 | format.mChannelsPerFrame = 2;
180 | if (AudioUnitSetProperty(au, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &format, sizeof(format))) abort();
181 | if (AudioUnitSetProperty(au, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &format, sizeof(format))) abort();
182 |
183 | AURenderCallbackStruct callbackStruct;
184 | callbackStruct.inputProc = audioProcessingCallback;
185 | callbackStruct.inputProcRefCon = (__bridge void *)self;
186 | if (AudioUnitSetProperty(au, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callbackStruct, sizeof(callbackStruct))) abort();
187 |
188 | AudioUnitInitialize(au);
189 | if (AudioOutputUnitStart(au)) abort();
190 |
191 | // Our buttons are not regular buttons, but labels or images. Add tap events here.
192 | button.userInteractionEnabled = website.userInteractionEnabled = superpowered.userInteractionEnabled = YES;
193 | UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onButton:)];
194 | [button addGestureRecognizer:gesture];
195 | gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onWebsite:)];
196 | [website addGestureRecognizer:gesture];
197 | gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onSuperpowered:)];
198 | [superpowered addGestureRecognizer:gesture];
199 |
200 | // Display system information.
201 | NSString *deviceModel = nil;
202 | struct utsname systemInfo;
203 | uname(&systemInfo);
204 | const char **m = machines[0];
205 | while (m[0]) {
206 | if (strcmp(m[0], systemInfo.machine) == 0) {
207 | deviceModel = [NSString stringWithCString:m[1] encoding:NSASCIIStringEncoding];
208 | break;
209 | };
210 | m++;
211 | };
212 | if (deviceModel == nil) deviceModel = [[UIDevice currentDevice] model];
213 | model.text = deviceModel;
214 | os.text = [NSString stringWithFormat:@"iOS %@", [[UIDevice currentDevice] systemVersion]];
215 |
216 | // Start updating the UI periodically.
217 | displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(UI_update)];
218 | displayLink.frameInterval = 1;
219 | [displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
220 | }
221 |
222 | // Social sharing and website hooks. Let's hope this creates a small viral loop for us. :-)
223 | - (void)composeSocial:(NSString *)serviceType {
224 | dispatch_async(dispatch_get_main_queue(), ^{
225 | SLComposeViewController *controller = [SLComposeViewController composeViewControllerForServiceType:serviceType];
226 | if (!controller) return;
227 |
228 | [controller setInitialText:[NSString stringWithFormat:@"I just tested my %@ with the Superpowered Latency Test App: %i ms.", self.model.text, self->measurer->latencyMs]];
229 | [controller addURL:[NSURL URLWithString:@"http://superpowered.com/latency"]];
230 | controller.completionHandler = ^(SLComposeViewControllerResult result) {};
231 |
232 | [self presentViewController:controller animated:YES completion:NULL];
233 | });
234 | }
235 | - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
236 | switch (buttonIndex) {
237 | case 0: if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) [self composeSocial:SLServiceTypeTwitter]; break;
238 | case 1: if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) [self composeSocial:SLServiceTypeFacebook]; break;
239 | case 2: {
240 | NSString *body = [NSString stringWithFormat:@"I just tested my %@ for audio latency.\r\n\r\nTotal roundtrip audio latency is %i ms.\r\nBuffer size is %i.\r\nSample rate is %i Hz.\r\n%@\r\n\r\nTest your mobile device's audio latency with the Superpowered Latency Test App for iOS and Android.\r\nhttp://superpowered.com/latency", model.text, measurer->latencyMs, measurer->buffersize, measurer->samplerate, os.text];
241 | [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"mailto:?subject=%@&body=%@", [@"Audio Latency Result" stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding], [body stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]]]];
242 | }; break;
243 | };
244 | }
245 | - (IBAction)onWebsite:(id)sender {
246 | [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://superpowered.com/latency"]];
247 | }
248 | - (IBAction)onSuperpowered:(id)sender {
249 | [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://superpowered.com"]];
250 | }
251 |
252 | - (void)dealloc {
253 | [displayLink invalidate];
254 | displayLink = nil;
255 | [[AVAudioSession sharedInstance] setActive:NO error:NULL];
256 | AudioUnitUninitialize(au);
257 | AudioComponentInstanceDispose(au);
258 | delete measurer;
259 | }
260 |
261 | @end
262 |
--------------------------------------------------------------------------------
/iOS/machines.h:
--------------------------------------------------------------------------------
1 | #ifndef SuperpoweredLatency_machines
2 | #define SuperpoweredLatency_machines
3 |
4 | const char *machines[][2] = {
5 |
6 | // iPhones
7 |
8 | { "iPhone1,1", "iPhone (first)" },
9 | { "iPhone1,2", "iPhone 3G" },
10 | { "iPhone2,1", "iPhone 3GS" },
11 | { "iPhone3,1", "iPhone 4" },
12 | { "iPhone3,3", "iPhone 4" },
13 | { "iPhone4,1", "iPhone 4S" },
14 | { "iPhone5,1", "iPhone 5" },
15 | { "iPhone5,2", "iPhone 5" },
16 | { "iPhone5,3", "iPhone 5c" },
17 | { "iPhone5,4", "iPhone 5c" },
18 | { "iPhone6,1", "iPhone 5s" },
19 | { "iPhone6,2", "iPhone 5s" },
20 | { "iPhone7,1", "iPhone 6 Plus" },
21 | { "iPhone7,2", "iPhone 6" },
22 | { "iPhone8,1", "iPhone 6s" },
23 | { "iPhone8,2", "iPhone 6s Plus" },
24 | { "iPhone8,4", "iPhone SE" },
25 | { "iPhone9,1", "iPhone 7" },
26 | { "iPhone9,2", "iPhone 7 Plus" },
27 | { "iPhone9,3", "iPhone 7" },
28 | { "iPhone9,4", "iPhone 7 Plus" },
29 | { "iPhone10,1", "iPhone 8" },
30 | { "iPhone10,2", "iPhone 8 Plus" },
31 | { "iPhone10,3", "iPhone X" },
32 | { "iPhone10,4", "iPhone 8" },
33 | { "iPhone10,5", "iPhone 8 Plus" },
34 | { "iPhone10,6", "iPhone X" },
35 | { "iPhone11,2", "iPhone XS" },
36 | { "iPhone11,4", "iPhone XS Max" },
37 | { "iPhone11,6", "iPhone XS Max" },
38 | { "iPhone11,8", "iPhone XR" },
39 | { "iPhone12,1", "iPhone 11" },
40 | { "iPhone12,3", "iPhone 11 Pro" },
41 | { "iPhone12,5", "iPhone 11 Pro Max" },
42 | { "iPhone12,8", "iPhone SE (2nd gen)" },
43 | { "iPhone13,1", "iPhone 12 mini" },
44 | { "iPhone13,2", "iPhone 12" },
45 | { "iPhone13,3", "iPhone 12 Pro" },
46 | { "iPhone13,4", "iPhone 12 Pro Max" },
47 | { "iPhone14,2", "iPhone 13 Pro" },
48 | { "iPhone14,3", "iPhone 13 Pro Max" },
49 | { "iPhone14,4", "iPhone 13 mini" },
50 | { "iPhone14,5", "iPhone 13" },
51 | { "iPhone14,6", "iPhone SE (3rd gen)" },
52 | { "iPhone14,7", "iPhone 14" },
53 | { "iPhone14,8", "iPhone 14 Plus" },
54 | { "iPhone15,2", "iPhone 14 Pro" },
55 | { "iPhone15,3", "iPhone 14 Pro Max" },
56 |
57 | // iPads
58 |
59 | { "iPad1,1", "iPad (first)" },
60 | { "iPad2,1", "iPad 2" },
61 | { "iPad2,2", "iPad 2" },
62 | { "iPad2,3", "iPad 2" },
63 | { "iPad2,4", "iPad 2" },
64 | { "iPad2,5", "iPad mini (first)" },
65 | { "iPad2,6", "iPad mini (first)" },
66 | { "iPad2,7", "iPad mini (first)" },
67 | { "iPad3,1", "iPad 3" },
68 | { "iPad3,2", "iPad 3" },
69 | { "iPad3,3", "iPad 3" },
70 | { "iPad3,4", "iPad 4" },
71 | { "iPad3,5", "iPad 4" },
72 | { "iPad3,6", "iPad 4" },
73 | { "iPad4,1", "iPad Air (first)" },
74 | { "iPad4,2", "iPad Air (first)" },
75 | { "iPad4,3", "iPad Air (first)" },
76 | { "iPad4,4", "iPad mini 2" },
77 | { "iPad4,5", "iPad mini 2" },
78 | { "iPad4,6", "iPad mini 2" },
79 | { "iPad4,7", "iPad mini 3" },
80 | { "iPad4,8", "iPad mini 3" },
81 | { "iPad4,9", "iPad mini 3" },
82 | { "iPad5,3", "iPad Air 2" },
83 | { "iPad5,4", "iPad Air 2" },
84 | { "iPad6,11", "iPad (5th gen)" },
85 | { "iPad6,12", "iPad (5th gen)" },
86 | { "iPad6,3", "iPad Pro" },
87 | { "iPad6,4", "iPad Pro" },
88 | { "iPad6,7", "iPad Pro" },
89 | { "iPad6,8", "iPad Pro" },
90 | { "iPad7,1", "iPad Pro (2nd gen)" },
91 | { "iPad7,11", "iPad (7th gen)" },
92 | { "iPad7,12", "iPad (7th gen)" },
93 | { "iPad7,2", "iPad Pro (2nd gen)" },
94 | { "iPad7,3", "iPad Pro" },
95 | { "iPad7,4", "iPad Pro" },
96 | { "iPad7,5", "iPad (6th gen)" },
97 | { "iPad7,6", "iPad (6th gen)" },
98 | { "iPad8,1", "iPad Pro" },
99 | { "iPad8,10", "iPad Pro (2nd gen)" },
100 | { "iPad8,11", "iPad Pro (4th gen)" },
101 | { "iPad8,12", "iPad Pro (4th gen)" },
102 | { "iPad8,2", "iPad Pro" },
103 | { "iPad8,3", "iPad Pro" },
104 | { "iPad8,4", "iPad Pro" },
105 | { "iPad8,5", "iPad Pro (3rd gen)" },
106 | { "iPad8,6", "iPad Pro (3rd gen)" },
107 | { "iPad8,7", "iPad Pro (3rd gen)" },
108 | { "iPad8,8", "iPad Pro (3rd gen)" },
109 | { "iPad8,9", "iPad Pro (2nd gen)" },
110 | { "iPad11,1", "iPad mini (5th gen)" },
111 | { "iPad11,2", "iPad mini (5th gen)" },
112 | { "iPad11,3", "iPad Air (3rd gen)" },
113 | { "iPad11,4", "iPad Air (3rd gen)" },
114 | { "iPad11,6", "iPad (8th gen)" },
115 | { "iPad11,7", "iPad (8th gen)" },
116 | { "iPad12,1", "iPad (9th gen)" },
117 | { "iPad12,2", "iPad (9th gen)" },
118 | { "iPad13,1", "iPad Air (4th gen)" },
119 | { "iPad13,10", "iPad Pro (5th gen)" },
120 | { "iPad13,11", "iPad Pro (5th gen)" },
121 | { "iPad13,16", "iPad Air (5th gen)" },
122 | { "iPad13,17", "iPad Air (5th gen)" },
123 | { "iPad13,18", "iPad (10th gen)" },
124 | { "iPad13,19", "iPad (10th gen)" },
125 | { "iPad13,2", "iPad Air 4 (4th gen)" },
126 | { "iPad13,4", "iPad Pro (3rd gen)" },
127 | { "iPad13,5", "iPad Pro (3rd gen)" },
128 | { "iPad13,6", "iPad Pro (3rd gen)" },
129 | { "iPad13,7", "iPad Pro (3rd gen)" },
130 | { "iPad13,8", "iPad Pro (5th gen)" },
131 | { "iPad13,9", "iPad Pro (5th gen)" },
132 | { "iPad14,1", "iPad mini (6th gen)" },
133 | { "iPad14,2", "iPad mini (6th gen)" },
134 | { "iPad14,3-A", "iPad Pro (4th gen)" },
135 | { "iPad14,3-B", "iPad Pro (4th gen)" },
136 | { "iPad14,4-A", "iPad Pro (4th gen)" },
137 | { "iPad14,4-B", "iPad Pro (4th gen)" },
138 | { "iPad14,5-A", "iPad Pro (6th gen)" },
139 | { "iPad14,5-B", "iPad Pro (6th gen)" },
140 | { "iPad14,6-A", "iPad Pro (6th gen)" },
141 | { "iPad14,6-B", "iPad Pro (6th gen)" },
142 |
143 |
144 | // iPods
145 |
146 | { "iPod1,1", "iPod touch (first)" },
147 | { "iPod2,1", "iPod touch (2nd gen)" },
148 | { "iPod3,1", "iPod touch (3rd gen)" },
149 | { "iPod4,1", "iPod touch (4th gen)" },
150 | { "iPod5,1", "iPod touch (5th gen)" },
151 | { "iPod7,1", "iPod touch (6th gen)" },
152 | { "iPod9,1", "iPod touch (7th gen)" },
153 |
154 | { NULL, NULL }
155 | };
156 |
157 | #endif
158 |
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/iOS/main.m:
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1 | #import
2 | #import "AppDelegate.h"
3 |
4 | int main(int argc, char * argv[]) {
5 | @autoreleasepool {
6 | return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
7 | }
8 | }
9 |
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/iOS/superpowered.png:
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https://raw.githubusercontent.com/superpoweredSDK/SuperpoweredLatency/693e3a19f186136386166567ec35d963914f3139/iOS/superpowered.png
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/iOS/superpowered@2x.png:
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https://raw.githubusercontent.com/superpoweredSDK/SuperpoweredLatency/693e3a19f186136386166567ec35d963914f3139/iOS/superpowered@2x.png
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/iOS/superpowered@3x.png:
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https://raw.githubusercontent.com/superpoweredSDK/SuperpoweredLatency/693e3a19f186136386166567ec35d963914f3139/iOS/superpowered@3x.png
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