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[idd] capture: replay only completed frames

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Track the newest submitted and completed frame independently. Only
retain or replay a frame after its copy callback succeeds.

Keep the prior completed frame when a newer copy fails, and compare
publication sequences so out-of-order callbacks cannot move backward.
This commit is contained in:
Geoffrey McRae
2026-08-06 14:02:39 +10:00
parent 160c5fd1fa
commit f6c72b0bc5
3 changed files with 42 additions and 18 deletions
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9
idd/LGIdd/CIndirectDeviceContext.h
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@@ -110,7 +110,10 @@ private:
size_t m_alignSize = 0;
size_t m_frameMemoryOffset = 0;
size_t m_maxFrameSize = 0;
std::atomic<LONG> m_publishedFrameIndex = -1;
// LGMP publication precedes copy completion, so only the ready index is safe
// to retain and replay.
std::atomic<LONG> m_submittedFrameIndex = -1;
std::atomic<LONG> m_readyFrameIndex = -1;
std::atomic<bool> m_frameInFlight[LGMP_Q_FRAME_BUFFER_LEN] = {};
SRWLOCK m_framePublishLock = SRWLOCK_INIT;
uint64_t m_framePublishSequence = 0;
@@ -270,7 +273,7 @@ public:
bool FrameBufferAvailable(const CFrameScheduler::Schedule& schedule);
bool HasPublishedFrame() const
{
return m_publishedFrameIndex.load(std::memory_order_acquire) >= 0;
return m_readyFrameIndex.load(std::memory_order_acquire) >= 0;
}
void ProcessFrameQueue();
bool GetSharedFrameTarget(uint64_t now, uint64_t& target);
@@ -283,7 +286,7 @@ public:
const CFrameScheduler::Schedule& schedule, bool periodic);
void AbortFrameBuffer(unsigned frameIndex);
void FailFrameBuffer(unsigned frameIndex);
void CompleteFrameBuffer(unsigned frameIndex);
void CompleteFrameBuffer(unsigned frameIndex, bool succeeded);
void SetFrameTiming(unsigned frameIndex, uint64_t captureTime,
uint64_t postProcessTime, uint64_t copyTime, uint64_t readyTime);
void WriteFrameBuffer(unsigned frameIndex, void* src, size_t offset, size_t len, bool setWritePos) const;