From 8f4501215c0dbbbde59da2d015fdec3dbe5131bc Mon Sep 17 00:00:00 2001
From: Nicolas James <Eele1Ephe7uZahRie@tutanota.com>
Date: Fri, 13 Feb 2026 18:21:04 +1100
Subject: add working frame tracking and commit before i break everything

---
 src/queue_context.hh | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

(limited to 'src/queue_context.hh')

diff --git a/src/queue_context.hh b/src/queue_context.hh
index 184e31d..a6f43e5 100644
--- a/src/queue_context.hh
+++ b/src/queue_context.hh
@@ -7,8 +7,11 @@
 #include <vulkan/utility/vk_dispatch_table.h>
 #include <vulkan/vulkan.hpp>
 
-#include <memory>
+#include <chrono>
 #include <deque>
+#include <memory>
+#include <span>
+#include <unordered_set>
 
 namespace low_latency {
 
@@ -21,19 +24,56 @@ class QueueContext final : public Context {
     const VkQueue queue;
     const std::uint32_t queue_family_index;
 
-    // this is incremented and tied to our semaphore
     std::uint64_t semaphore_sequence = 0;
     VkSemaphore semaphore;
 
     VkCommandPool command_pool;
 
     std::unique_ptr<TimestampPool> timestamp_pool;
-    std::deque<std::unique_ptr<TimestampPool::Handle>> handle_hack;
+
+    // Potentially in flight queue submissions
+    struct Submission {
+        const std::unordered_set<VkSemaphore> signals;
+        const std::unordered_set<VkSemaphore> waits;
+        const std::uint64_t target_semaphore_sequence;
+        const std::shared_ptr<TimestampPool::Handle> timestamp_handle;
+    };
+    std::deque<std::shared_ptr<Submission>> submissions;
+
+    // In flight frames!
+    // These might come from different contexts.
+    struct Frame {
+        const QueueContext& start_context;
+        const std::shared_ptr<TimestampPool::Handle> start;
+        const std::uint64_t target_start_sequence;
+
+        const QueueContext& end_context;
+        const std::shared_ptr<TimestampPool::Handle> end;
+        const std::uint64_t target_end_sequence;
+    };
+    // These can be null, it means we made presented without finding the
+    // timestamps associated with the present.
+    std::deque<std::unique_ptr<Frame>> in_flight_frames;
 
   public:
     QueueContext(DeviceContext& device_context, const VkQueue& queue,
                  const std::uint32_t& queue_family_index);
     virtual ~QueueContext();
+
+  public:
+    void notify_submit(std::span<const VkSubmitInfo> infos,
+                       const std::uint64_t target_semaphore_sequence,
+                       std::shared_ptr<TimestampPool::Handle>&& handle);
+    void notify_submit(std::span<const VkSubmitInfo2> infos,
+                       const std::uint64_t target_semaphore_sequence,
+                       std::shared_ptr<TimestampPool::Handle>&& handle);
+
+    void notify_present(const VkPresentInfoKHR& info);
+
+  public:
+    // Computes the amount we should delay...
+    using duration_t = std::chrono::steady_clock::duration;
+    std::optional<duration_t> get_delay_time();
 };
 
 }; // namespace low_latency
-- 
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