Add profiling infrastructure and widget

src/common/profiler_reporting.h

@@ -0,0 +1,108 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <chrono>
+#include <mutex>
+#include <utility>
+#include <vector>
+
+#include "common/profiler.h"
+#include "common/synchronized_wrapper.h"
+
+namespace Common {
+namespace Profiling {
+
+struct TimingCategoryInfo {
+    static const unsigned int NO_PARENT = -1;
+
+    TimingCategory* category;
+    const char* name;
+    unsigned int parent;
+};
+
+struct ProfilingFrameResult {
+    /// Time since the last delivered frame
+    Duration interframe_time;
+
+    /// Time spent processing a frame, excluding VSync
+    Duration frame_time;
+
+    /// Total amount of time spent inside each category in this frame. Indexed by the category id
+    std::vector<Duration> time_per_category;
+};
+
+class ProfilingManager final {
+public:
+    ProfilingManager();
+
+    unsigned int RegisterTimingCategory(TimingCategory* category, const char* name);
+    void SetTimingCategoryParent(unsigned int category, unsigned int parent);
+
+    const std::vector<TimingCategoryInfo>& GetTimingCategoriesInfo() const {
+        return timing_categories;
+    }
+
+    /// This should be called after swapping screen buffers.
+    void BeginFrame();
+    /// This should be called before swapping screen buffers.
+    void FinishFrame();
+
+    /// Get the timing results from the previous frame. This is updated when you call FinishFrame().
+    const ProfilingFrameResult& GetPreviousFrameResults() const {
+        return results;
+    }
+
+private:
+    std::vector<TimingCategoryInfo> timing_categories;
+    Clock::time_point last_frame_end;
+    Clock::time_point this_frame_start;
+
+    ProfilingFrameResult results;
+};
+
+struct AggregatedDuration {
+    Duration avg, min, max;
+};
+
+struct AggregatedFrameResult {
+    /// Time since the last delivered frame
+    AggregatedDuration interframe_time;
+
+    /// Time spent processing a frame, excluding VSync
+    AggregatedDuration frame_time;
+
+    float fps;
+
+    /// Total amount of time spent inside each category in this frame. Indexed by the category id
+    std::vector<AggregatedDuration> time_per_category;
+};
+
+class TimingResultsAggregator final {
+public:
+    TimingResultsAggregator(size_t window_size);
+
+    void Clear();
+    void SetNumberOfCategories(size_t n);
+
+    void AddFrame(const ProfilingFrameResult& frame_result);
+
+    AggregatedFrameResult GetAggregatedResults() const;
+
+    size_t max_window_size;
+    size_t window_size;
+    size_t cursor;
+
+    std::vector<Duration> interframe_times;
+    std::vector<Duration> frame_times;
+    std::vector<std::vector<Duration>> times_per_category;
+};
+
+ProfilingManager& GetProfilingManager();
+SynchronizedRef<TimingResultsAggregator> GetTimingResultsAggregator();
+
+} // namespace Profiling
+} // namespace Common