Add the ability to start a voice at a particular time

1 files changed, 5 insertions, 1 deletions

diff --git a/alc/alu.cpp b/alc/alu.cpp
index bc39b108..647b163b 100644
--- a/alc/alu.cpp
+++ b/alc/alu.cpp
@@ -105,6 +105,7 @@ static_assert(!(MaxResamplerPadding&1), "MaxResamplerPadding is not a multiple o
 namespace {
 
 using uint = unsigned int;
+using namespace std::chrono;
 
 constexpr uint MaxPitch{10};
 
@@ -1841,6 +1842,9 @@ void ProcessContexts(DeviceBase *device, const uint SamplesToDo)
 {
     ASSUME(SamplesToDo > 0);
 
+    const nanoseconds curtime{device->ClockBase +
+        nanoseconds{seconds{device->SamplesDone}}/device->Frequency};
+
     for(ContextBase *ctx : *device->mContexts.load(std::memory_order_acquire))
     {
         const EffectSlotArray &auxslots = *ctx->mActiveAuxSlots.load(std::memory_order_acquire);
@@ -1861,7 +1865,7 @@ void ProcessContexts(DeviceBase *device, const uint SamplesToDo)
         {
             const Voice::State vstate{voice->mPlayState.load(std::memory_order_acquire)};
             if(vstate != Voice::Stopped && vstate != Voice::Pending)
-                voice->mix(vstate, ctx, SamplesToDo);
+                voice->mix(vstate, ctx, curtime, SamplesToDo);
         }
 
         /* Process effects. */