From 4329eaae159248de34d9604c6adc6b6f5ca9e7e0 Mon Sep 17 00:00:00 2001
From: heck <heck@heck.live>
Date: Mon, 23 Sep 2024 02:27:29 +0200
Subject: [PATCH] sai.h - constexpr `GetSampleRate()`

---
 src/per/sai.cpp | 14 +++-----------
 src/per/sai.h   | 12 ++++++------
 2 files changed, 9 insertions(+), 17 deletions(-)

diff --git a/src/per/sai.cpp b/src/per/sai.cpp
index 869111e24..2e6bd7cc2 100644
--- a/src/per/sai.cpp
+++ b/src/per/sai.cpp
@@ -27,7 +27,7 @@ class SaiHandle::Impl
     SaiHandle::Result StopDmaTransfer();
 
     // Utility functions
-    float  GetSampleRate();
+    constexpr float  GetSampleRate();
     size_t GetBlockSize();
     float  GetBlockRate();
 
@@ -337,17 +337,9 @@ SaiHandle::Result SaiHandle::Impl::StopDmaTransfer()
     return Result::OK;
 }
 
-float SaiHandle::Impl::GetSampleRate()
+constexpr float SaiHandle::Impl::GetSampleRate()
 {
-    switch(config_.sr)
-    {
-        case Config::SampleRate::SAI_8KHZ: return 8000.f;
-        case Config::SampleRate::SAI_16KHZ: return 16000.f;
-        case Config::SampleRate::SAI_32KHZ: return 32000.f;
-        case Config::SampleRate::SAI_48KHZ: return 48000.f;
-        case Config::SampleRate::SAI_96KHZ: return 96000.f;
-        default: return 48000.f;
-    }
+    return config_.sr;
 }
 size_t SaiHandle::Impl::GetBlockSize()
 {
diff --git a/src/per/sai.h b/src/per/sai.h
index bec5c06e9..10a3ecd4c 100644
--- a/src/per/sai.h
+++ b/src/per/sai.h
@@ -53,13 +53,13 @@ class SaiHandle
         };
 
         /** Rate at which samples will be streaming to/from the device. */
-        enum class SampleRate
+        enum SampleRate : int
         {
-            SAI_8KHZ,
-            SAI_16KHZ,
-            SAI_32KHZ,
-            SAI_48KHZ,
-            SAI_96KHZ,
+            SAI_8KHZ = 8000,
+            SAI_16KHZ = 16000,
+            SAI_32KHZ = 32000,
+            SAI_48KHZ = 48000,
+            SAI_96KHZ = 96000,
         };
 
         /** Bit Depth that the hardware expects to be transferred to/from the device. */