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/************************************************************************************
Filename : Util_LatencyTest2Reader.cpp
Content : Shared functionality for the DK2 latency tester
Created : July 8, 2014
Authors : Volga Aksoy, Chris Taylor
Copyright : Copyright 2014 Oculus VR, Inc. All Rights reserved.
Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License");
you may not use the Oculus VR Rift SDK except in compliance with the License,
which is provided at the time of installation or download, or which
otherwise accompanies this software in either electronic or hard copy form.
You may obtain a copy of the License at
http://www.oculusvr.com/licenses/LICENSE-3.1
Unless required by applicable law or agreed to in writing, the Oculus VR SDK
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*************************************************************************************/
#include "Util_LatencyTest2Reader.h"
namespace OVR { namespace Util {
//// FrameTimeRecord
bool FrameTimeRecord::ColorToReadbackIndex(int *readbackIndex, unsigned char color)
{
int compareColor = color - LT2_ColorIncrement/2;
int index = color / LT2_ColorIncrement; // Use color without subtraction due to rounding.
int delta = compareColor - index * LT2_ColorIncrement;
if ((delta < LT2_PixelTestThreshold) && (delta > -LT2_PixelTestThreshold))
{
*readbackIndex = index;
return true;
}
return false;
}
unsigned char FrameTimeRecord::ReadbackIndexToColor(int readbackIndex)
{
OVR_ASSERT(readbackIndex < LT2_IncrementCount);
return (unsigned char)(readbackIndex * LT2_ColorIncrement + LT2_ColorIncrement/2);
}
//// FrameTimeRecordSet
FrameTimeRecordSet::FrameTimeRecordSet()
{
NextWriteIndex = 0;
memset(this, 0, sizeof(FrameTimeRecordSet));
}
void FrameTimeRecordSet::AddValue(int readValue, double timeSeconds)
{
Records[NextWriteIndex].ReadbackIndex = readValue;
Records[NextWriteIndex].TimeSeconds = timeSeconds;
NextWriteIndex++;
if (NextWriteIndex == RecordCount)
NextWriteIndex = 0;
}
// Matching should be done starting from NextWrite index
// until wrap-around
const FrameTimeRecord& FrameTimeRecordSet::operator [] (int i) const
{
return Records[(NextWriteIndex + i) & RecordMask];
}
const FrameTimeRecord& FrameTimeRecordSet::GetMostRecentFrame()
{
return Records[(NextWriteIndex - 1) & RecordMask];
}
// Advances I to absolute color index
bool FrameTimeRecordSet::FindReadbackIndex(int* i, int readbackIndex) const
{
for (; *i < RecordCount; (*i)++)
{
if ((*this)[*i].ReadbackIndex == readbackIndex)
return true;
}
return false;
}
bool FrameTimeRecordSet::IsAllZeroes() const
{
for (int i = 0; i < RecordCount; i++)
if (Records[i].ReadbackIndex != 0)
return false;
return true;
}
//// RecordStateReader
void RecordStateReader::GetRecordSet(FrameTimeRecordSet& recordset)
{
if(!Updater)
{
return;
}
recordset = Updater->SharedLatencyTestState.GetState();
return;
}
}} // namespace OVR::Util
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