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Fixes around GetLatency: sending frames in correct order and only completed frames

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This commit is contained in:
FakeMichau
2025-08-24 19:43:36 +02:00
parent a9399ab66b
commit ee40304b6a
2 changed files with 29 additions and 4 deletions
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OptiScaler/nvapi/fakenvapi/low_latency.h
+4 -1
View File
@@ -12,6 +12,9 @@
#include "util.h"
#include <optional>
#define FRAME_REPORTS_BUFFER_SIZE 70
#define NVAPI_BUFFER_SIZE 64
struct FrameReport {
uint64_t frameID;
uint64_t inputSampleTime;
@@ -35,7 +38,7 @@ struct FrameReport {
class LowLatency {
private:
LowLatencyTech* currently_active_tech; // TODO: mutex the access???
FrameReport frame_reports[64]{};
FrameReport frame_reports[FRAME_REPORTS_BUFFER_SIZE]{};
std::optional<bool> forced_fg;
bool fg;
uint32_t delay_deinit = 0;
OptiScaler/nvapi/fakenvapi/low_latency_d3d.cpp
+25 -3
View File
@@ -83,8 +83,24 @@ bool LowLatency::update_low_latency_tech(IUnknown* pDevice) {
}
void LowLatency::get_latency_result(NV_LATENCY_RESULT_PARAMS* pGetLatencyParams) {
for (auto i = 0; i < 64; i++) {
memcpy(&pGetLatencyParams->frameReport[i], &frame_reports[i], sizeof(frame_reports[i]));
// TODO: report all zeros if not enough data
size_t minIdx = 0;
uint64_t minID = frame_reports[0].frameID;
for (size_t i = 1; i < FRAME_REPORTS_BUFFER_SIZE; i++) {
if (frame_reports[i].frameID < minID) {
minID = frame_reports[i].frameID;
minIdx = i;
}
}
// Copy starting from older before wrapping around
size_t firstChunk = std::min<uint64_t>(NVAPI_BUFFER_SIZE, FRAME_REPORTS_BUFFER_SIZE - minIdx);
std::memcpy(pGetLatencyParams->frameReport, frame_reports + minIdx, firstChunk * sizeof(FrameReport));
// Copy the rest after wrapping around
if (firstChunk < NVAPI_BUFFER_SIZE) {
std::memcpy(pGetLatencyParams->frameReport + firstChunk, frame_reports, (NVAPI_BUFFER_SIZE - firstChunk) * sizeof(FrameReport));
}
}
@@ -92,7 +108,13 @@ void LowLatency::add_marker_to_report(NV_LATENCY_MARKER_PARAMS* pSetLatencyMarke
auto current_timestamp = get_timestamp() / 1000;
static auto last_sim_start = current_timestamp;
static auto _2nd_last_sim_start = current_timestamp;
auto current_report = &frame_reports[pSetLatencyMarkerParams->frameID % 64];
auto current_report = &frame_reports[pSetLatencyMarkerParams->frameID % FRAME_REPORTS_BUFFER_SIZE];
if (current_report->frameID != pSetLatencyMarkerParams->frameID)
{
*current_report = FrameReport{};
}
current_report->frameID = pSetLatencyMarkerParams->frameID;
current_report->gpuFrameTimeUs = (uint32_t)(last_sim_start - _2nd_last_sim_start);
current_report->gpuActiveRenderTimeUs = 100;