From bdd8c21fcfff8041ea94a972903ce42e58c2a5c2 Mon Sep 17 00:00:00 2001
From: ozpv <39195175+ozpv@users.noreply.github.com>
Date: Sat, 29 Aug 2026 23:04:49 -0500
Subject: add retain

---
 Core/Inc/cs4272.h | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

(limited to 'Core/Inc/cs4272.h')

diff --git a/Core/Inc/cs4272.h b/Core/Inc/cs4272.h
index 423b7c0..4e22263 100755
--- a/Core/Inc/cs4272.h
+++ b/Core/Inc/cs4272.h
@@ -26,16 +26,27 @@
 #define CS4272_I2C_ADDR (0b0010000 << 1)
 
 #define SAMPLE_RATE 48000
-#define BUFFER_SIZE 512
+#define BUFFER_SIZE 1024
 
-extern volatile int32_t rx_buffer[BUFFER_SIZE];
-extern volatile int32_t tx_buffer[BUFFER_SIZE];
-extern volatile float samples[BUFFER_SIZE];
+typedef enum Channel {
+    LEFT = 0,
+    RIGHT = 1,
+    MONO = 0,
+} Channel;
+
+extern int32_t rx_buffer[BUFFER_SIZE];
+extern int32_t tx_buffer[BUFFER_SIZE];
 
 extern const uint8_t CS4272_CONFIG[7];
 
 uint8_t CS4272_Init(void);
 
-#define INT24_MAX 0x7FFFFF
+static inline __attribute__((always_inline)) float int24_t_to_f32(const int32_t in) {
+    return ((float)(in << 8)) / ((float)INT32_MAX);
+}
+
+static inline __attribute__((always_inline)) int32_t f32_to_int24_t(const float in) {
+    return ((int32_t)(in * ((float)INT32_MAX))) >> 8;
+}
 
 #endif /* INC_CS4272_H_ */
-- 
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