From d4b513db161258a84a340612135080989fa82d54 Mon Sep 17 00:00:00 2001
From: Shaji Khan <quotablecode@gmail.com>
Date: Tue, 27 Feb 2024 14:33:17 +0530
Subject: [PATCH] latency tuner

---
 app/src/main/cpp/Engine.cpp | 20 +++++++++++---------
 app/src/main/cpp/Engine.h   |  2 +-
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/app/src/main/cpp/Engine.cpp b/app/src/main/cpp/Engine.cpp
index f3ebdb0c..5cb800a1 100644
--- a/app/src/main/cpp/Engine.cpp
+++ b/app/src/main/cpp/Engine.cpp
@@ -144,6 +144,9 @@ oboe::Result  Engine::openStreams() {
         OUT ;
         return result;
     }
+
+    latencyTunerOut = new oboe::LatencyTuner ( *mPlayStream);
+    latencyTunerOut->tune();
     warnIfNotLowLatency(mRecordingStream);
 
     mFullDuplexPass.setInputStream(mRecordingStream);
@@ -511,15 +514,14 @@ std::string Engine::tuneLatency () {
 
     latencyTuner->requestReset();
     oboe::Result result = latencyTuner->tune() ;
-    char tmp [10];
+    latencyTunerOut->requestReset();
+    oboe::Result resultOut = latencyTunerOut->tune() ;
+    char tmp [400];
     // 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());
+    sprintf (tmp, "Tuner: %d/%d, Xruns: %d/%d, Buffer size in frames: %d/%d", result, resultOut,
+             mRecordingStream->getXRunCount(),mPlayStream->getXRunCount(),
+             mRecordingStream->getBufferSizeInFrames(), mPlayStream->getBufferSizeInFrames());
+    LOGD ("%s",tmp);
     OUT
-    return str ;
+    return std::string (tmp) ;
 }
\ No newline at end of file
diff --git a/app/src/main/cpp/Engine.h b/app/src/main/cpp/Engine.h
index cb24d41e..66209436 100644
--- a/app/src/main/cpp/Engine.h
+++ b/app/src/main/cpp/Engine.h
@@ -76,7 +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::LatencyTuner *latencyTuner, *latencyTunerOut;
     oboe::Result openStreams();
 
     void closeStreams();