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Appli/Core/Inc/fx_reverb.h

@@ -0,0 +1,50 @@
+#ifndef FX_REVERB_H
+#define FX_REVERB_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FX_REVERB_NUM_COMBS    8U
+#define FX_REVERB_NUM_ALLPASS  4U
+
+typedef struct
+{
+    bool  enabled;
+    float room_size;  /* 0.0 a 1.0 */
+    float damping;    /* 0.0 (brillant) a 1.0 (etouffe) */
+    float mix;        /* 0.0 (sec) a 1.0 (100% reverbere) */
+} FxReverbParams;
+
+typedef struct
+{
+    float   *buffer;
+    uint32_t size;
+    uint32_t idx;
+    float    filter_store;
+} FxCombState;
+
+typedef struct
+{
+    float   *buffer;
+    uint32_t size;
+    uint32_t idx;
+} FxAllpassState;
+
+typedef struct
+{
+    FxCombState    combs[FX_REVERB_NUM_COMBS];
+    FxAllpassState allpass[FX_REVERB_NUM_ALLPASS];
+} FxReverbState;
+
+void  FxReverb_Init(FxReverbState *state, FxReverbParams *params);
+float FxReverb_Process(FxReverbState *state, const FxReverbParams *params, float input);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* FX_REVERB_H */