tetrees/Plugins/Wwise/ThirdParty/include/AK/DSP/AkVolAutomation.h

/*******************************************************************************
The content of this file includes portions of the AUDIOKINETIC Wwise Technology
released in source code form as part of the SDK installer package.

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  Copyright (c) 2023 Audiokinetic Inc.
*******************************************************************************/

#ifndef _AKVOLUMEAUTOMATION_H_
#define _AKVOLUMEAUTOMATION_H_

#include <AK/SoundEngine/Common/AkTypes.h>
#include <AK/SoundEngine/Common/AkCommonDefs.h>
#include <AK/SoundEngine/Common/AkSimd.h>

namespace AK
{
	namespace DSP
	{
		// Takes and audio buffer, a volume automation buffer, and a transform, and applies the transformed volume automation to the audio buffer.
		static inline void ApplyVolAutomation(AkAudioBuffer& in_pAudioBuffer, const AkModulatorXfrm in_xfrms, const AkReal32* in_pAutmBuf )
		{
			AKSIMD_V4F32 vOffset = AKSIMD_LOAD1_V4F32( in_xfrms.m_fOffset ); 
			AKSIMD_V4F32 vScale = AKSIMD_LOAD1_V4F32( in_xfrms.m_fScale ); 

			for( AkUInt32 ch = 0; ch < in_pAudioBuffer.NumChannels(); ++ch)
			{
				AKSIMD_V4F32 * AK_RESTRICT pModSrcBuf = (AKSIMD_V4F32* AK_RESTRICT) in_pAutmBuf;
				AKSIMD_V4F32 * AK_RESTRICT pAudioBuf = (AKSIMD_V4F32* AK_RESTRICT) ( in_pAudioBuffer.GetChannel(ch) );
				AKSIMD_V4F32 * AK_RESTRICT pAudioBufEnd = pAudioBuf + (in_pAudioBuffer.MaxFrames() / 4);

				while ( pAudioBuf < pAudioBufEnd )
				{
					AKSIMD_V4F32 temp = AKSIMD_MADD_V4F32( *pModSrcBuf, vScale, vOffset );
					*pAudioBuf = AKSIMD_MUL_V4F32(*pAudioBuf, temp );
					pAudioBuf++;
					pModSrcBuf++;
				}
			}
		}

		// Takes and audio buffer, an array of volume automation buffers, and an array of transforms, and applies each 
		//	transformed volume automation to the audio buffer.
		static inline void ApplyVolAutomation(AkAudioBuffer& in_pAudioBuffer, AkModulatorXfrm* in_arrayXfrms, AkReal32** in_pArrayAutmBufs, AkUInt32 in_uNumModulators )
		{
			for (AkUInt32 i = 0; i< in_uNumModulators; ++i )
			{
				const AkModulatorXfrm& xfrm = in_arrayXfrms[i];
				const AkReal32* pAutmBuf = in_pArrayAutmBufs[i];
				ApplyVolAutomation(in_pAudioBuffer, xfrm, pAutmBuf );
			}
		}

	} // namespace DSP
} // namespace AK

#endif // _AKVOLUMEAUTOMATION_H_