/***********************************************************************************************************************
*                                                                                                                      *
* libscopeprotocols                                                                                                    *
*                                                                                                                      *
* Copyright (c) 2012-2022 Andrew D. Zonenberg and contributors                                                         *
* All rights reserved.                                                                                                 *
*                                                                                                                      *
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the     *
* following conditions are met:                                                                                        *
*                                                                                                                      *
*    * Redistributions of source code must retain the above copyright notice, this list of conditions, and the         *
*      following disclaimer.                                                                                           *
*                                                                                                                      *
*    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the       *
*      following disclaimer in the documentation and/or other materials provided with the distribution.                *
*                                                                                                                      *
*    * Neither the name of the author nor the names of any contributors may be used to endorse or promote products     *
*      derived from this software without specific prior written permission.                                           *
*                                                                                                                      *
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   *
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL *
* THE AUTHORS BE HELD LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES        *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR       *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT *
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE       *
* POSSIBILITY OF SUCH DAMAGE.                                                                                          *
*                                                                                                                      *
***********************************************************************************************************************/

#include "../scopehal/scopehal.h"
#include "USB2ActivityDecoder.h"
#include "USB2PCSDecoder.h"

using namespace std;

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

USB2ActivityDecoder::USB2ActivityDecoder(const string& color)
	: Filter(color, CAT_SERIAL)
{
	AddDigitalStream("data");
	CreateInput("din");
}

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

bool USB2ActivityDecoder::ValidateChannel(size_t i, StreamDescriptor stream)
{
	if(stream.m_channel == NULL)
		return false;

	if( (i == 0) && (dynamic_cast<USB2PCSWaveform*>(stream.m_channel->GetData(0)) != NULL) )
		return true;

	return false;
}

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

string USB2ActivityDecoder::GetProtocolName()
{
	return "USB 1.x/2.0 Activity";
}

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

void USB2ActivityDecoder::Refresh()
{
	//Make sure we've got valid inputs
	if(!VerifyAllInputsOK())
	{
		SetData(NULL, 0);
		return;
	}

	//Get the input data
	auto din = dynamic_cast<USB2PCSWaveform*>(GetInputWaveform(0));
	din->PrepareForCpuAccess();
	size_t len = din->size();

	auto cap = SetupEmptySparseDigitalOutputWaveform(din, 0);
	cap->PrepareForCpuAccess();

	//Start low, go high when we see a SYNC, low at EOP
	int64_t last = 0;
	for(size_t i=0; i<len; i++)
	{
		auto sin = din->m_samples[i];
		if(sin.m_type == USB2PCSSymbol::TYPE_SYNC)
		{
			cap->m_offsets.push_back(last);
			cap->m_durations.push_back(din->m_offsets[i] - last);
			cap->m_samples.push_back(false);
			last = din->m_offsets[i];
		}

		if(sin.m_type == USB2PCSSymbol::TYPE_EOP)
		{
			cap->m_offsets.push_back(last);
			cap->m_durations.push_back(din->m_offsets[i] + din->m_durations[i] - last);
			cap->m_samples.push_back(true);
			last = din->m_offsets[i] + din->m_durations[i];
		}
	}

	SetData(cap, 0);
	cap->MarkModifiedFromCpu();
}
