add comments to clarify the meaning of the constants in ambi_convert.c

#include "ivas_cnst.h"

#include "ambi_convert.h"

#define SQRT_2_ 1.4142135f

#define SQRT_3_ 1.7320508f

#define SQRT_5_ 2.2360679f

#define SQRT_7_ 2.64575131f

#define INV_SQRT_2_ 0.7071067f

#define INV_SQRT_3_ 0.5773502f

#define INV_SQRT_5_ 0.4472135f

#define INV_SQRT_7_ 0.3779644f

#define TWO_OVER_SQRT_3_   1.1547005f

#define THREE_OVER_SQRT_5_ 1.3416408f

#define SQRT_8_OVER_5_     1.2649110f

#define SQRT_45_OVER_32_   1.1858541f

#define INV_TWO_OVER_SQRT_3_   0.8660254f

#define INV_THREE_OVER_SQRT_5_ 0.7453560f

#define INV_SQRT_8_OVER_5_     0.7905694f

#define INV_SQRT_45_OVER_32_   0.8432740f

#define SQRT_2_ 1.4142135f   /* sqrtf(2.0f) */

#define SQRT_3_ 1.7320508f   /* sqrtf(3.0f) */

#define SQRT_5_ 2.2360679f   /* sqrtf(5.0f) */

#define SQRT_7_ 2.64575131f  /* sqrtf(7.0f) */

#define INV_SQRT_2_ 0.7071067f    /* 1.0f/sqrtf(2.0f) */

#define INV_SQRT_3_ 0.5773502f    /* 1.0f/sqrtf(3.0f) */

#define INV_SQRT_5_ 0.4472135f    /* 1.0f/sqrtf(5.0f) */

#define INV_SQRT_7_ 0.3779644f    /* 1.0f/sqrtf(7.0f) */

#define TWO_OVER_SQRT_3_   1.1547005f     /* 2.0f/sqrtf(3.0f)   */

#define THREE_OVER_SQRT_5_ 1.3416408f     /* 3.0f/sqrtf(5.0f)   */ 

#define SQRT_8_OVER_5_     1.2649110f     /* sqrtf(8.0f/5.0f)   */

#define SQRT_45_OVER_32_   1.1858541f     /* sqrtf(45.0f/32.0f) */

#define INV_TWO_OVER_SQRT_3_   0.8660254f     /* 1.0f/TWO_OVER_SQRT_3_   */

#define INV_THREE_OVER_SQRT_5_ 0.7453560f	  /* 1.0f/THREE_OVER_SQRT_5_ */

#define INV_SQRT_8_OVER_5_     0.7905694f     /* 1.0f/INV_SQRT_8_OVER_5_ */

#define INV_SQRT_45_OVER_32_   0.8432740f     /* 1.0f/SQRT_45_OVER_32_   */

#define AMBI_MAX_CHANNELS 16