00001 
00002 //
00003 // Copyright (c) 2010 Audiokinetic Inc. / All Rights Reserved
00004 //
00006 
00007 #ifndef _AK_VECTORVALUERAMP_H_
00008 #define _AK_VECTORVALUERAMP_H_
00009 
00010 #include <AK/SoundEngine/Common/AkSimd.h>
00011 
00014 class CAkVectorValueRampV4
00015 {
00016 public:
00017 
00018     AkForceInline AKSIMD_V4F32 Setup( AkReal32 in_fStartValue, AkReal32 in_fStopValue, AkUInt32 in_uNumFrames )
00019     {
00020         const AkReal32 fIncrement = (in_fStopValue-in_fStartValue)/in_uNumFrames;
00021         const AkReal32 f4xInc = 4.f*fIncrement;
00022         vIncrement = AKSIMD_LOAD1_V4F32( f4xInc);
00023         AK_ALIGN_SIMD( AkReal32 fVal[4] );
00024         fVal[0] = in_fStartValue;
00025         fVal[1] = fVal[0] + fIncrement;
00026         fVal[2] = fVal[1] + fIncrement;
00027         fVal[3] = fVal[2] + fIncrement;
00028         vValueRamp = AKSIMD_LOAD_V4F32( fVal );
00029         return vValueRamp;
00030     }
00031 
00032     AkForceInline AKSIMD_V4F32 Tick( )
00033     {
00034         vValueRamp = AKSIMD_ADD_V4F32( vValueRamp, vIncrement );
00035         return vValueRamp;
00036     }
00037 
00038 private:
00039     AKSIMD_V4F32 vIncrement;
00040     AKSIMD_V4F32 vValueRamp;
00041 };
00042 
00043 
00044 #ifdef AKSIMD_V2F32_SUPPORTED
00045 
00046 
00047 class CAkVectorValueRampV2
00048 {
00049 public:
00050 
00051     AkForceInline AKSIMD_V2F32 Setup( AkReal32 in_fStartValue, AkReal32 in_fStopValue, AkUInt32 in_uNumFrames )
00052     {
00053         const AkReal32 fIncrement = (in_fStopValue-in_fStartValue)/in_uNumFrames;
00054         const AkReal32 f2xInc = 2.f*fIncrement;
00055         vIncrement = AKSIMD_SET_V2F32( f2xInc );
00056         AKSIMD_BUILD_V2F32( const AKSIMD_V2F32 vStartOffset, 0.f, fIncrement );
00057         AKSIMD_V2F32 l_vValueRamp = AKSIMD_SET_V2F32( in_fStartValue );
00058         l_vValueRamp = AKSIMD_ADD_V2F32( l_vValueRamp, vStartOffset );
00059         vValueRamp = l_vValueRamp;
00060         return l_vValueRamp;
00061     }
00062 
00063     AkForceInline AKSIMD_V2F32 Tick( )
00064     {
00065         vValueRamp = AKSIMD_ADD_V2F32( vValueRamp, vIncrement );
00066         return vValueRamp;
00067     }
00068 
00069 private:
00070     AKSIMD_V2F32 vIncrement;
00071     AKSIMD_V2F32 vValueRamp;
00072 };
00073 #endif
00074 
00075 // By default, CAkVectorValueRamp uses the V4 implementation.
00076 typedef CAkVectorValueRampV4 CAkVectorValueRamp;
00077 
00078 #endif //_AK_VECTORVALUERAMP_H_