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

using namespace std;

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

InvertFilter::InvertFilter(const string& color)
	: Filter(color, CAT_MATH)
{
	AddStream(Unit(Unit::UNIT_VOLTS), "data", Stream::STREAM_TYPE_ANALOG);
	CreateInput("din");
}

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

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

	if( (i == 0) && (stream.GetType() == Stream::STREAM_TYPE_ANALOG) )
		return true;

	return false;
}

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

string InvertFilter::GetProtocolName()
{
	return "Invert";
}

void InvertFilter::SetDefaultName()
{
	char hwname[256];
	snprintf(hwname, sizeof(hwname), "-%s", GetInputDisplayName(0).c_str());
	m_hwname = hwname;
	m_displayname = m_hwname;
}

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

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

	auto din = GetInputWaveform(0);
	size_t len = din->size();

	auto udin = dynamic_cast<UniformAnalogWaveform*>(din);
	auto sdin = dynamic_cast<SparseAnalogWaveform*>(din);

	if(sdin)
	{
		//Negate each sample
		auto cap = SetupSparseOutputWaveform(sdin, 0, 0, 0);
		cap->PrepareForCpuAccess();
		float* out = (float*)__builtin_assume_aligned(&cap->m_samples[0], 16);
		float* a = (float*)__builtin_assume_aligned(&sdin->m_samples[0], 16);
		for(size_t i=0; i<len; i++)
			out[i] = -a[i];

		cap->MarkModifiedFromCpu();
	}
	else if(udin)
	{
		//Negate each sample
		auto cap = SetupEmptyUniformAnalogOutputWaveform(udin, 0);
		cap->Resize(len);
		cap->PrepareForCpuAccess();
		float* out = (float*)__builtin_assume_aligned(&cap->m_samples[0], 16);
		float* a = (float*)__builtin_assume_aligned(&udin->m_samples[0], 16);
		for(size_t i=0; i<len; i++)
			out[i] = -a[i];

		cap->MarkModifiedFromCpu();
	}
}
