nuclear@0: /************************************************************************************
nuclear@0: 
nuclear@0: Filename    :   Util_LatencyTest2Reader.cpp
nuclear@0: Content     :   Shared functionality for the DK2 latency tester
nuclear@0: Created     :   July 8, 2014
nuclear@0: Authors     :   Volga Aksoy, Chris Taylor
nuclear@0: 
nuclear@0: Copyright   :   Copyright 2014 Oculus VR, LLC All Rights reserved.
nuclear@0: 
nuclear@0: Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); 
nuclear@0: you may not use the Oculus VR Rift SDK except in compliance with the License, 
nuclear@0: which is provided at the time of installation or download, or which 
nuclear@0: otherwise accompanies this software in either electronic or hard copy form.
nuclear@0: 
nuclear@0: You may obtain a copy of the License at
nuclear@0: 
nuclear@0: http://www.oculusvr.com/licenses/LICENSE-3.2 
nuclear@0: 
nuclear@0: Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
nuclear@0: distributed under the License is distributed on an "AS IS" BASIS,
nuclear@0: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nuclear@0: See the License for the specific language governing permissions and
nuclear@0: limitations under the License.
nuclear@0: 
nuclear@0: *************************************************************************************/
nuclear@0: 
nuclear@0: #include "Util_LatencyTest2Reader.h"
nuclear@0: 
nuclear@0: namespace OVR { namespace Util {
nuclear@0: 
nuclear@0: 
nuclear@0: //// FrameTimeRecord
nuclear@0: 
nuclear@0: bool FrameTimeRecord::ColorToReadbackIndex(int *readbackIndex, unsigned char color)
nuclear@0: {
nuclear@0:     int compareColor = color - LT2_ColorIncrement/2;
nuclear@0:     int index        = color / LT2_ColorIncrement;  // Use color without subtraction due to rounding.
nuclear@0:     int delta        = compareColor - index * LT2_ColorIncrement;
nuclear@0: 
nuclear@0:     if ((delta < LT2_PixelTestThreshold) && (delta > -LT2_PixelTestThreshold))
nuclear@0:     {
nuclear@0:         *readbackIndex = index;
nuclear@0:         return true;
nuclear@0:     }
nuclear@0:     return false;
nuclear@0: }
nuclear@0: 
nuclear@0: unsigned char FrameTimeRecord::ReadbackIndexToColor(int readbackIndex)
nuclear@0: {
nuclear@0:     OVR_ASSERT(readbackIndex < LT2_IncrementCount);
nuclear@0:     return (unsigned char)(readbackIndex * LT2_ColorIncrement + LT2_ColorIncrement/2);
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: //// FrameTimeRecordSet
nuclear@0: 
nuclear@0: FrameTimeRecordSet::FrameTimeRecordSet()
nuclear@0: {
nuclear@0:     NextWriteIndex = 0;
nuclear@0:     memset(this, 0, sizeof(FrameTimeRecordSet));
nuclear@0: }
nuclear@0: 
nuclear@0: void FrameTimeRecordSet::AddValue(int readValue, double timeSeconds)
nuclear@0: {
nuclear@0:     Records[NextWriteIndex].ReadbackIndex = readValue;
nuclear@0:     Records[NextWriteIndex].TimeSeconds = timeSeconds;
nuclear@0:     NextWriteIndex++;
nuclear@0:     if (NextWriteIndex == RecordCount)
nuclear@0:         NextWriteIndex = 0;
nuclear@0: }
nuclear@0: // Matching should be done starting from NextWrite index 
nuclear@0: // until wrap-around
nuclear@0: 
nuclear@0: const FrameTimeRecord& FrameTimeRecordSet::operator [] (int i) const
nuclear@0: {
nuclear@0:     return Records[(NextWriteIndex + i) & RecordMask];
nuclear@0: }
nuclear@0: 
nuclear@0: const FrameTimeRecord& FrameTimeRecordSet::GetMostRecentFrame()
nuclear@0: {
nuclear@0:     return Records[(NextWriteIndex - 1) & RecordMask];
nuclear@0: }
nuclear@0: 
nuclear@0: // Advances I to  absolute color index
nuclear@0: bool FrameTimeRecordSet::FindReadbackIndex(int* i, int readbackIndex) const
nuclear@0: {
nuclear@0:     for (; *i < RecordCount; (*i)++)
nuclear@0:     {
nuclear@0:         if ((*this)[*i].ReadbackIndex == readbackIndex)
nuclear@0:             return true;
nuclear@0:     }
nuclear@0:     return false;
nuclear@0: }
nuclear@0: 
nuclear@0: bool FrameTimeRecordSet::IsAllZeroes() const
nuclear@0: {
nuclear@0:     for (int i = 0; i < RecordCount; i++)
nuclear@0:         if (Records[i].ReadbackIndex != 0)
nuclear@0:             return false;
nuclear@0:     return true;
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: //// RecordStateReader
nuclear@0: 
nuclear@0: void RecordStateReader::GetRecordSet(FrameTimeRecordSet& recordset)
nuclear@0: {
nuclear@0:     if(!Updater)
nuclear@0:     {
nuclear@0:         return;
nuclear@0:     }
nuclear@0:         
nuclear@0:     recordset = Updater->SharedLatencyTestState.GetState();
nuclear@0:     return;
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: }} // namespace OVR::Util