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2026-09-07 19:33:37 +08:00
parent c945aa211f
commit c7b6c90ec9
20 changed files with 1029 additions and 0 deletions
@@ -0,0 +1,48 @@
+#ifndef INCLUDED_C_FFT_H
+#define INCLUDED_C_FFT_H
+
+#ifndef INCLUDED_C_TYPES_H
+#include <c_Types.h>
+#endif /*INCLUDED_C_TYPES_H*/
+
+#ifndef INCLUDED_C_ALLOCATOR_H
+#include <c_Allocator.h>
+#endif /*INCLUDED_C_ALLOCATOR_H*/
+
+#ifndef INCLUDED_C_COMPLEX_H
+#include <c_Complex.h>
+#endif /*INCLUDED_C_COMPLEX_H*/
+
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+
+typedef struct {
+    c_size_t      N;          /* Length of the signal buffer (Must be a power of 2) */
+    c_Allocator_t allocator;  /* Deep copy of the user-provided allocator */
+} c_FFT_t;
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+/**
+ * @brief Initializes the FFT calculation engine context.
+ * @param N Total number of signal sample points (Must be a strict power of 2)
+ */
+c_err_t c_FFT_Init(c_FFT_t* self, c_size_t N, c_Allocator_t* allocator);
+
+/**
+ * @brief Releases internal tracking engine allocations.
+ */
+void c_FFT_Destroy(c_FFT_t* self);
+
+/**
+ * @brief Non-recursively executes the forward or inverse FFT in-place.
+ * @param signal Array of complex samples of size self->N (Modified in-place)
+ * @param inverse Set to C_TRUE for Inverse FFT (IFFT), C_FALSE for Forward FFT
+ */
+c_err_t c_FFT_Execute(const c_FFT_t* self, c_Complex_t* signal, c_bool_t inverse);
+
+
+#endif /*INCLUDED_C_FFT_H*/