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* libscopeprotocols                                                                                                    *
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* Copyright (c) 2012-2022 Andrew D. Zonenberg and contributors                                                         *
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#include "../scopehal/scopehal.h"
#include "MagnitudeFilter.h"

using namespace std;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Construction / destruction

MagnitudeFilter::MagnitudeFilter(const string& color)
	: Filter(color, CAT_RF)
{
	AddStream(Unit(Unit::UNIT_VOLTS), "data", Stream::STREAM_TYPE_ANALOG);
	CreateInput("I");
	CreateInput("Q");
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Factory methods

bool MagnitudeFilter::ValidateChannel(size_t i, StreamDescriptor stream)
{
	if(stream.m_channel == NULL)
		return false;

	if( (i < 2) && (stream.GetType() == Stream::STREAM_TYPE_ANALOG) )
		return true;

	return false;
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Accessors

string MagnitudeFilter::GetProtocolName()
{
	return "Vector Magnitude";
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Actual decoder logic

void MagnitudeFilter::Refresh()
{
	//Make sure we've got valid inputs
	if(!VerifyAllInputsOK())
	{
		SetData(NULL, 0);
		return;
	}

	//Get the input data
	auto a = GetInputWaveform(0);
	auto b = GetInputWaveform(1);
	a->PrepareForCpuAccess();
	b->PrepareForCpuAccess();
	auto len = min(a->size(), b->size());

	//Copy Y axis units from input
	SetYAxisUnits(m_inputs[0].GetYAxisUnits(), 0);

	auto ua = dynamic_cast<UniformAnalogWaveform*>(a);
	auto ub = dynamic_cast<UniformAnalogWaveform*>(b);
	auto sa = dynamic_cast<SparseAnalogWaveform*>(a);
	auto sb = dynamic_cast<SparseAnalogWaveform*>(b);

	if(ua && ub)
	{
		//Set up the output waveform
		auto cap = SetupEmptyUniformAnalogOutputWaveform(a, 0);
		cap->Resize(len);
		cap->PrepareForCpuAccess();

		float* fa = (float*)__builtin_assume_aligned(ua->m_samples.GetCpuPointer(), 16);
		float* fb = (float*)__builtin_assume_aligned(ub->m_samples.GetCpuPointer(), 16);
		float* fdst = (float*)__builtin_assume_aligned(cap->m_samples.GetCpuPointer(), 16);
		for(size_t i=0; i<len; i++)
			fdst[i] = sqrtf(fa[i]*fa[i] + fb[i]*fb[i]);

		cap->MarkModifiedFromCpu();
	}
	else if(sa && sb)
	{
		//Set up the output waveform
		auto cap = SetupSparseOutputWaveform(sa, 0, 0, 0);
		cap->Resize(len);
		cap->PrepareForCpuAccess();

		float* fa = (float*)__builtin_assume_aligned(sa->m_samples.GetCpuPointer(), 16);
		float* fb = (float*)__builtin_assume_aligned(sb->m_samples.GetCpuPointer(), 16);
		float* fdst = (float*)__builtin_assume_aligned(cap->m_samples.GetCpuPointer(), 16);
		for(size_t i=0; i<len; i++)
			fdst[i] = sqrtf(fa[i]*fa[i] + fb[i]*fb[i]);

		cap->MarkModifiedFromCpu();
	}
}
