From b77b1cdf84d784b8bafe9ffd72a4ab221b979744 Mon Sep 17 00:00:00 2001
From: pszsh <jesspshoes@gmail.com>
Date: Sat, 31 Jan 2026 20:06:41 -0800
Subject: [PATCH] perfromance on mobile

---
 CMakeLists.txt      | 28 ++++++++++++++++++++++++----
 src/AudioEngine.cpp |  5 +++++
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 029f7df..961f78a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,6 +21,21 @@ include(FetchContent)
 option(BUILD_ANDROID "Build for Android" OFF)
 option(BUILD_IOS "Build for iOS" OFF)
 
+# --- Feature Flags ---
+# Default to OFF for mobile to save resources, ON for desktop
+if(BUILD_ANDROID OR BUILD_IOS)
+    option(ENABLE_TEMPO_ESTIMATION "Enable Loop Tempo Estimator for BPM detection" OFF)
+else()
+    option(ENABLE_TEMPO_ESTIMATION "Enable Loop Tempo Estimator for BPM detection" ON)
+endif()
+
+if(ENABLE_TEMPO_ESTIMATION)
+    message(STATUS "Tempo Estimation (Entropy) Enabled")
+    add_compile_definitions(ENABLE_TEMPO_ESTIMATION)
+else()
+    message(STATUS "Tempo Estimation (Entropy) Disabled")
+endif()
+
 find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Multimedia OpenGLWidgets)
 
 # --- FFTW3 Configuration (Double Precision) ---
@@ -88,9 +103,11 @@ else()
 endif()
 
 # --- Loop Tempo Estimator ---
-set(BUILD_TESTS OFF CACHE BOOL "Build tests" FORCE)
-set(BUILD_VAMP_PLUGIN OFF CACHE BOOL "Build Vamp plugin" FORCE)
-add_subdirectory(libraries/loop-tempo-estimator)
+if(ENABLE_TEMPO_ESTIMATION)
+    set(BUILD_TESTS OFF CACHE BOOL "Build tests" FORCE)
+    set(BUILD_VAMP_PLUGIN OFF CACHE BOOL "Build Vamp plugin" FORCE)
+    add_subdirectory(libraries/loop-tempo-estimator)
+endif()
 
 # ==========================================
 # --- ICON GENERATION ---
@@ -216,9 +233,12 @@ endif()
 target_link_libraries(YrCrystals PRIVATE
     Qt6::Core Qt6::Gui Qt6::Widgets Qt6::Multimedia Qt6::OpenGLWidgets
     ${FFTW_TARGET}
-    loop-tempo-estimator
 )
 
+if(ENABLE_TEMPO_ESTIMATION)
+    target_link_libraries(YrCrystals PRIVATE loop-tempo-estimator)
+endif()
+
 if(BUILD_ANDROID)
     target_link_libraries(YrCrystals PRIVATE log m)
     set_property(TARGET YrCrystals PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
diff --git a/src/AudioEngine.cpp b/src/AudioEngine.cpp
index ff97e9b..ba820b8 100644
--- a/src/AudioEngine.cpp
+++ b/src/AudioEngine.cpp
@@ -12,6 +12,8 @@
 #include <QThreadPool> 
 #include <QPointer> // Added for QPointer
 #include "Utils.h" 
+
+#ifdef ENABLE_TEMPO_ESTIMATION
 #include "LoopTempoEstimator/LoopTempoEstimator.h"
 
 // --- Helper: Memory Reader for BPM ---
@@ -38,6 +40,7 @@ private:
     long long m_numFrames;
     int m_sampleRate;
 };
+#endif
 
 // =========================================================
 // AudioEngine (Playback) Implementation
@@ -243,6 +246,7 @@ void AudioEngine::onFinished() {
 
         if (totalFrames > 0) {
             // 1. BPM Detection
+#ifdef ENABLE_TEMPO_ESTIMATION
             MemoryAudioReader reader(rawFloats, totalFrames, newData->sampleRate);
             auto bpmOpt = LTE::GetBpm(reader, LTE::FalsePositiveTolerance::Lenient, nullptr);
             
@@ -253,6 +257,7 @@ void AudioEngine::onFinished() {
                 QMetaObject::invokeMethod(self, "analysisReady", Qt::QueuedConnection, 
                                           Q_ARG(float, bpm), Q_ARG(float, 1.0f));
             }
+#endif
             
             // 2. Hilbert Transform
             std::vector<double> inputL(totalFrames), inputR(totalFrames);