latency tuner

djshaji · Feb 26, 2024 · dbaf48f · dbaf48f
1 parent 51cbffb
commit dbaf48f
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Showing 8 changed files with 51 additions and 3 deletions.
diff --git a/app/src/main/cpp/Engine.cpp b/app/src/main/cpp/Engine.cpp
@@ -42,6 +42,7 @@ bool Engine::setEffectOn(bool isOn) {
                 }
                 */
                 mFullDuplexPass.start();
+
                 fileWriter->setSampleRate (mSampleRate);
 
 //                char buffer [80];
@@ -132,7 +133,7 @@ oboe::Result  Engine::openStreams() {
 
     result = inBuilder.openStream(mRecordingStream);
 
-    oboe::LatencyTuner *latencyTuner = new oboe::LatencyTuner ( *mRecordingStream, 160);
+    latencyTuner = new oboe::LatencyTuner ( *mRecordingStream, 160);
     latencyTuner->setMinimumBufferSize(160);
     mRecordingStream->setBufferSizeInFrames(80);
     latencyTuner->tune();
@@ -501,4 +502,24 @@ bool Engine::setPluginBuffer (float * buffer, int buffer_size, int plugin) {
     mFullDuplexPass.bypass = false ;
     OUT
     return true ;
+}
+
+std::string Engine::tuneLatency () {
+    IN
+    if (! mIsEffectOn)
+        return std::string ("Turn on audio engine first") ;
+
+    latencyTuner->requestReset();
+    oboe::Result result = latencyTuner->tune() ;
+    char tmp [10];
+    // hello, old friend
+    sprintf (tmp, "%f", mRecordingStream->getXRunCount());
+    std::string str = std::string ("Tuner: " +
+                                   std::to_string(static_cast<double>(result)) +
+                                   ", Buffer: " + std::to_string(mRecordingStream->getBufferSizeInFrames())
+            + ", Xruns: " +  std::string (tmp));
+
+    LOGD ("%s",str.c_str());
+    OUT
+    return str ;
 }
diff --git a/app/src/main/cpp/Engine.h b/app/src/main/cpp/Engine.h
@@ -14,6 +14,7 @@ class Engine : public oboe::AudioStreamCallback {
 public:
     std::string LIBRARY_PATH ;
     Engine() ;
+    std::string tuneLatency();
     JavaVM * vm ;
     bool              mIsEffectOn = false;
     bool setPluginBuffer (float * buffer, int buffer_size, int plugin) ;
@@ -75,6 +76,7 @@ class Engine : public oboe::AudioStreamCallback {
     int32_t           mRecordingDeviceId = oboe::kUnspecified;
     int32_t           mPlaybackDeviceId = oboe::kUnspecified;
     oboe::AudioApi    mAudioApi = oboe::AudioApi::AAudio;
+    oboe::LatencyTuner *latencyTuner;
     oboe::Result openStreams();
 
     void closeStreams();

diff --git a/app/src/main/cpp/FullDuplexStream.h b/app/src/main/cpp/FullDuplexStream.h
@@ -21,11 +21,11 @@
 #include <sys/types.h>
 
 #include "oboe/Oboe.h"
+#include <oboe/LatencyTuner.h>
 
 class FullDuplexStream : public oboe::AudioStreamCallback {
 public:
 
-    FullDuplexStream() {}
     virtual ~FullDuplexStream() = default;
 
     void setInputStream(std::shared_ptr<oboe::AudioStream> stream) {

diff --git a/app/src/main/cpp/native-lib.cpp b/app/src/main/cpp/native-lib.cpp
@@ -810,4 +810,10 @@ jint plugin
     LOGI ("array of size %d", len);
     int retval = engine -> setPluginBuffer (body, len, plugin);
     env->ReleaseFloatArrayElements(data, body, 0);
+}
+extern "C"
+JNIEXPORT jstring JNICALL
+Java_com_shajikhan_ladspa_amprack_AudioEngine_tuneLatency(JNIEnv *env, jclass clazz) {
+    if (engine == NULL) return NULL ;
+    return env->NewStringUTF (engine -> tuneLatency ().c_str());
 }
diff --git a/app/src/main/java/com/shajikhan/ladspa/amprack/AudioEngine.java b/app/src/main/java/com/shajikhan/ladspa/amprack/AudioEngine.java
@@ -74,6 +74,7 @@ public class AudioEngine {
 
     static native void testLV2 ();
     static native void setPluginBuffer (float  [] data, int plugin);
+    static native String tuneLatency ();
 
     static void setDefaultStreamValues(Context context) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){

diff --git a/app/src/main/java/com/shajikhan/ladspa/amprack/Rack.java b/app/src/main/java/com/shajikhan/ladspa/amprack/Rack.java
@@ -63,6 +63,7 @@
 import com.google.firebase.firestore.FieldValue;
 import com.google.firebase.firestore.FirebaseFirestore;
 
+import org.checkerframework.checker.units.qual.A;
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.w3c.dom.Text;
@@ -504,7 +505,16 @@ public boolean onMenuItemClick(MenuItem item) {
             }
         });
 
-        MenuItem exit_item = optionsMenu.getMenu().getItem(10);
+        MenuItem tuneLatency = optionsMenu.getMenu().getItem(10);
+        tuneLatency.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
+            @Override
+            public boolean onMenuItemClick(MenuItem menuItem) {
+                MainActivity.toast(AudioEngine.tuneLatency());
+                return false;
+            }
+        });
+
+        MenuItem exit_item = optionsMenu.getMenu().getItem(11);
         exit_item.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
             @Override
             public boolean onMenuItemClick(MenuItem menuItem) {

diff --git a/app/src/main/res/drawable/baseline_tune_24.xml b/app/src/main/res/drawable/baseline_tune_24.xml
@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M3,17v2h6v-2L3,17zM3,5v2h10L13,5L3,5zM13,21v-2h8v-2h-8v-2h-2v6h2zM7,9v2L3,11v2h4v2h2L9,9L7,9zM21,13v-2L11,11v2h10zM15,9h2L17,7h4L21,5h-4L17,3h-2v6z"/>
+</vector>
diff --git a/app/src/main/res/menu/options_menu.xml b/app/src/main/res/menu/options_menu.xml
@@ -29,6 +29,9 @@
     <item android:id="@+id/load_collection"
         android:title="Load presets from file"/>
 
+    <item android:id="@+id/menu_tune"
+        android:title="Latency Tuner"
+        android:icon="@drawable/baseline_tune_24"/>
     <item android:id="@+id/menu_exit"
         android:title="Exit"
         android:icon="@drawable/ic_baseline_close_24"/>