From eff63546e002be1801effd3e3557a52dca8e6314 Mon Sep 17 00:00:00 2001
From: chucknology <chuck@knowledge.wtf>
Date: Thu, 20 Jun 2024 18:28:40 -0700
Subject: [PATCH 1/2] Fix Android thread priority

Android threads are Linux threads which differ from the POSIX standard. Calling pthread_setschedparam does not produce the intended effect on Android.
---
 src/sfizz/FilePool.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/sfizz/FilePool.cpp b/src/sfizz/FilePool.cpp
index fa7e5afb3..5157ba0ef 100644
--- a/src/sfizz/FilePool.cpp
+++ b/src/sfizz/FilePool.cpp
@@ -42,6 +42,8 @@
 #include <atomic_queue/defs.h>
 #if defined(_WIN32)
 #include <windows.h>
+#elif defined(__ANDROID__)
+#include <sys/resource.h>
 #else
 #include <pthread.h>
 #endif
@@ -609,6 +611,13 @@ void sfz::FilePool::raiseCurrentThreadPriority() noexcept
         std::system_error error(GetLastError(), std::system_category());
         DBG("[sfizz] Cannot set current thread priority: " << error.what());
     }
+#elif defined(__ANDROID__)
+    int tid = gettid();  // Android specific function to get thread ID
+    int priority = -20;  // Highest priority for nice value
+    if (setpriority(PRIO_PROCESS, tid, priority) != 0) {
+        // setpriority sets errno on failure
+        DBG("[sfizz] Cannot set current thread priority: " << strerror(errno));
+    }
 #else
     pthread_t thread = pthread_self();
     int policy;

From 8c5ccc25c83a818aa8a3e7f0ca95d1b5b8048af0 Mon Sep 17 00:00:00 2001
From: chucknology <chuck@knowledge.wtf>
Date: Sun, 15 Jun 2025 07:07:13 -0700
Subject: [PATCH 2/2] Change FilePool Android thread priority to -2
 (FOREGROUND)

---
 src/sfizz/FilePool.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/sfizz/FilePool.cpp b/src/sfizz/FilePool.cpp
index 5157ba0ef..bab9fbd05 100644
--- a/src/sfizz/FilePool.cpp
+++ b/src/sfizz/FilePool.cpp
@@ -612,8 +612,8 @@ void sfz::FilePool::raiseCurrentThreadPriority() noexcept
         DBG("[sfizz] Cannot set current thread priority: " << error.what());
     }
 #elif defined(__ANDROID__)
-    int tid = gettid();  // Android specific function to get thread ID
-    int priority = -20;  // Highest priority for nice value
+    int tid = gettid(); // Android specific function to get thread ID
+    int priority = -2;  // android.os.Process.THREAD_PRIORITY_FOREGROUND
     if (setpriority(PRIO_PROCESS, tid, priority) != 0) {
         // setpriority sets errno on failure
         DBG("[sfizz] Cannot set current thread priority: " << strerror(errno));