timing refactor

apps/RenderCadenceCompositor/app/AppConfigProvider.cpp

@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <cctype>
+#include <cstdint>
 #include <cstdlib>
 #include <fstream>
 #include <sstream>
@@ -184,6 +185,50 @@ double FrameDurationMillisecondsFromRateString(const std::string& rateText, doub
 	return 1000.0 / rate;
 }
 
+double FrameDurationMillisecondsFromDisplayMode(BMDDisplayMode displayMode, double fallbackMilliseconds)
+{
+	struct ModeRate
+	{
+		BMDDisplayMode mode;
+		int64_t frameDuration;
+		int64_t timeScale;
+	};
+
+	static const ModeRate rates[] =
+	{
+		{ bmdModeHD720p50, 1, 50 },
+		{ bmdModeHD720p5994, 1001, 60000 },
+		{ bmdModeHD720p60, 1, 60 },
+		{ bmdModeHD1080i50, 1, 25 },
+		{ bmdModeHD1080i5994, 1001, 30000 },
+		{ bmdModeHD1080i6000, 1, 30 },
+		{ bmdModeHD1080p2398, 1001, 24000 },
+		{ bmdModeHD1080p24, 1, 24 },
+		{ bmdModeHD1080p25, 1, 25 },
+		{ bmdModeHD1080p2997, 1001, 30000 },
+		{ bmdModeHD1080p30, 1, 30 },
+		{ bmdModeHD1080p50, 1, 50 },
+		{ bmdModeHD1080p5994, 1001, 60000 },
+		{ bmdModeHD1080p6000, 1, 60 },
+		{ bmdMode4K2160p2398, 1001, 24000 },
+		{ bmdMode4K2160p24, 1, 24 },
+		{ bmdMode4K2160p25, 1, 25 },
+		{ bmdMode4K2160p2997, 1001, 30000 },
+		{ bmdMode4K2160p30, 1, 30 },
+		{ bmdMode4K2160p50, 1, 50 },
+		{ bmdMode4K2160p5994, 1001, 60000 },
+		{ bmdMode4K2160p60, 1, 60 }
+	};
+
+	for (const ModeRate& rate : rates)
+	{
+		if (rate.mode == displayMode && rate.timeScale > 0)
+			return (static_cast<double>(rate.frameDuration) * 1000.0) / static_cast<double>(rate.timeScale);
+	}
+
+	return fallbackMilliseconds;
+}
+
 void VideoFormatDimensions(const std::string& formatName, unsigned& width, unsigned& height)
 {
 	std::string normalized = formatName;

apps/RenderCadenceCompositor/app/AppConfigProvider.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "AppConfig.h"
+#include "DeckLinkDisplayMode.h"
 
 #include <filesystem>
 #include <string>
@@ -27,6 +28,7 @@ private:
 };
 
 double FrameDurationMillisecondsFromRateString(const std::string& rateText, double fallbackRate = 59.94);
+double FrameDurationMillisecondsFromDisplayMode(BMDDisplayMode displayMode, double fallbackMilliseconds);
 void VideoFormatDimensions(const std::string& formatName, unsigned& width, unsigned& height);
 std::filesystem::path FindConfigFile(const std::filesystem::path& relativePath = "config/runtime-host.json");
 std::filesystem::path FindRepoPath(const std::filesystem::path& relativePath);