[Scummvm-git-logs] scummvm master -> 84cdfd7ed1a3142f4497efec7cf839755be4670d

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Summary:
84cdfd7ed1 MATH: constify DCT calc functions


Commit: 84cdfd7ed1a3142f4497efec7cf839755be4670d
    https://github.com/scummvm/scummvm/commit/84cdfd7ed1a3142f4497efec7cf839755be4670d
Author: Vladimir Menshakov (vladimir.menshakov at gmail.com)
Date: 2025-11-30T19:20:28Z

Commit Message:
MATH: constify DCT calc functions

Changed paths:
    math/dct.cpp
    math/dct.h


diff --git a/math/dct.cpp b/math/dct.cpp
index 3f98d852eed..33c69cc461e 100644
--- a/math/dct.cpp
+++ b/math/dct.cpp
@@ -48,7 +48,7 @@ DCT::~DCT() {
 	delete[] _csc2;
 }
 
-void DCT::calc(float *data) {
+void DCT::calc(float *data) const {
 	switch (_trans) {
 	case DCT_I:
 		calcDCTI(data);
@@ -72,7 +72,7 @@ void DCT::calc(float *data) {
 /* cos((M_PI * x / (2*n)) */
 #define COS(n,x) (_tCos[x])
 
-void DCT::calcDCTI(float *data) {
+void DCT::calcDCTI(float *data) const {
 	int n = 1 << _bits;
 
 	float next = -0.5f * (data[0] - data[n]);
@@ -104,7 +104,7 @@ void DCT::calcDCTI(float *data) {
 		data[i] = data[i - 2] - data[i];
 }
 
-void DCT::calcDCTII(float *data) {
+void DCT::calcDCTII(float *data) const {
 	int n = 1 << _bits;
 
 	for (int i = 0; i < (n / 2); i++) {
@@ -141,7 +141,7 @@ void DCT::calcDCTII(float *data) {
 	}
 }
 
-void DCT::calcDCTIII(float *data) {
+void DCT::calcDCTIII(float *data) const {
 	int n = 1 << _bits;
 
 	float next  = data[n - 1];
@@ -175,7 +175,7 @@ void DCT::calcDCTIII(float *data) {
 	}
 }
 
-void DCT::calcDSTI(float *data) {
+void DCT::calcDSTI(float *data) const {
 	int n = 1 << _bits;
 
 	data[0] = 0;
diff --git a/math/dct.h b/math/dct.h
index 9453766832d..e9f44316b81 100644
--- a/math/dct.h
+++ b/math/dct.h
@@ -61,7 +61,7 @@ public:
 	DCT(int bits, TransformType trans);
 	~DCT();
 
-	void calc(float *data);
+	void calc(float *data) const;
 
 private:
 	int _bits;
@@ -74,10 +74,10 @@ private:
 
 	RDFT *_rdft;
 
-	void calcDCTI  (float *data);
-	void calcDCTII (float *data);
-	void calcDCTIII(float *data);
-	void calcDSTI  (float *data);
+	void calcDCTI(float *data) const;
+	void calcDCTII(float *data) const;
+	void calcDCTIII(float *data) const;
+	void calcDSTI(float *data) const;
 };
 
 /** @} */