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* libscopeprotocols                                                                                                    *
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* Copyright (c) 2012-2023 Andrew D. Zonenberg and contributors                                                         *
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#include "../scopehal/scopehal.h"
#include "VectorPhaseFilter.h"

using namespace std;

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

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

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

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

	if(i > 1)
		return false;

	if(stream.GetType() == Stream::STREAM_TYPE_ANALOG)
		return true;

	return false;
}

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

string VectorPhaseFilter::GetProtocolName()
{
	return "Vector Phase";
}

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

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

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

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

	float* fa = (float*)&a->m_samples[0];
	float* fb = (float*)&b->m_samples[0];
	float scale = 180 / M_PI;
	for(size_t i=0; i<len; i++)
		cap->m_samples[i] = atan2(fa[i], fb[i]) * scale;

	cap->MarkModifiedFromCpu();
}
