G3: 1 clock - PDC latency that + playhead engine-derived

2026-08-28 15:51:19 +07:00
parent c72362e088
commit 6cbdbd8e9c
8 changed files with 218 additions and 10 deletions
@@ -236,6 +236,15 @@ int run_juce_fx_loop(const std::string& jobPath, const std::string& shmName,
            MemoryBarrier();
            ipc->h.outWrite++;
            ++processed;
+            // G3: báo processed samples (playhead engine-derived — app tính
+            // position = (processed - anchor - latency)/sr) qua lat ring slot
+            // đặc biệt 0xFFFFFFFE. Python _lat_drain tách riêng (không vào
+            // latencies dict). Ring 8 slot, Python drain mỗi ~2ms — an toàn.
+            const uint32_t pls = ipc->h.latWrite & (FXRT_LAT_SLOTS - 1);
+            ipc->lat[pls].slot = 0xFFFFFFFEu;
+            ipc->lat[pls].samples = (uint32_t)(processed * n);
+            MemoryBarrier();
+            ipc->h.latWrite++;
        }
        const auto perfIterT1 = std::chrono::steady_clock::now();
        const double perfLoopMs = std::chrono::duration<double, std::milli>(perfIterT1 - perfT0).count();