Use a normal vector for the voices array

al/source.cpp

@@ -77,10 +77,10 @@ using namespace std::placeholders;
 ALvoice *GetSourceVoice(ALsource *source, ALCcontext *context)
 {
     ALuint idx{source->VoiceIdx};
-    if(idx < context->mVoiceCount.load(std::memory_order_relaxed))
+    if(idx < context->mVoices.size())
     {
         ALuint sid{source->id};
-        ALvoice &voice = (*context->mVoices)[idx];
+        ALvoice &voice = context->mVoices[idx];
         if(voice.mSourceID.load(std::memory_order_acquire) == sid)
             return &voice;
     }
@@ -2671,38 +2671,20 @@ START_API_FUNC
     }
 
     /* Count the number of reusable voices. */
-    auto voices_end = context->mVoices->begin() +
-        context->mVoiceCount.load(std::memory_order_relaxed);
-    auto free_voices = std::accumulate(context->mVoices->begin(), voices_end, ALsizei{0},
-        [](const ALsizei count, const ALvoice &voice) noexcept -> ALsizei
-        {
-            if(voice.mPlayState.load(std::memory_order_acquire) == ALvoice::Stopped &&
-                voice.mSourceID.load(std::memory_order_relaxed) == 0u)
-                return count + 1;
-            return count;
-        }
-    );
+    auto count_free_voices = [](const ALsizei count, const ALvoice &voice) noexcept -> ALsizei
+    {
+        if(voice.mPlayState.load(std::memory_order_acquire) == ALvoice::Stopped &&
+            voice.mSourceID.load(std::memory_order_relaxed) == 0u)
+            return count + 1;
+        return count;
+    };
+    auto free_voices = std::accumulate(context->mVoices.begin(), context->mVoices.end(),
+        ALsizei{0}, count_free_voices);
     if UNLIKELY(n > free_voices)
     {
-        /* Increment the number of voices to handle the request. */
+        /* Increase the number of voices to handle the request. */
         const ALuint need_voices{static_cast<ALuint>(n) - free_voices};
-        const size_t rem_voices{context->mVoices->size() -
-            context->mVoiceCount.load(std::memory_order_relaxed)};
-
-        if UNLIKELY(need_voices > rem_voices)
-        {
-            /* Allocate more voices to get enough. */
-            const size_t alloc_count{need_voices - rem_voices};
-            if UNLIKELY(context->mVoices->size() > std::numeric_limits<ALsizei>::max()-alloc_count)
-                SETERR_RETURN(context, AL_OUT_OF_MEMORY,,
-                    "Overflow increasing voice count to %zu + %zu", context->mVoices->size(),
-                    alloc_count);
-
-            const size_t newcount{context->mVoices->size() + alloc_count};
-            context->allocVoices(newcount);
-        }
-
-        context->mVoiceCount.fetch_add(need_voices, std::memory_order_relaxed);
+        context->mVoices.resize(context->mVoices.size() + need_voices);
     }
 
     auto start_source = [&context,device](ALsource *source) -> void
@@ -2757,9 +2739,8 @@ START_API_FUNC
         }
 
         /* Look for an unused voice to play this source with. */
-        auto voices_end = context->mVoices->begin() +
-            context->mVoiceCount.load(std::memory_order_relaxed);
-        voice = std::find_if(context->mVoices->begin(), voices_end,
+        auto voices_end = context->mVoices.data() + context->mVoices.size();
+        voice = std::find_if(context->mVoices.data(), voices_end,
             [](const ALvoice &voice) noexcept -> bool
             {
                 return voice.mPlayState.load(std::memory_order_acquire) == ALvoice::Stopped &&
@@ -2767,7 +2748,7 @@ START_API_FUNC
             }
         );
         assert(voice != voices_end);
-        auto vidx = static_cast<ALuint>(std::distance(context->mVoices->begin(), voice));
+        auto vidx = static_cast<ALuint>(std::distance(context->mVoices.data(), voice));
         voice->mPlayState.store(ALvoice::Stopped, std::memory_order_release);
 
         source->PropsClean.test_and_set(std::memory_order_acquire);
@@ -3317,9 +3298,7 @@ ALsource::~ALsource()
 void UpdateAllSourceProps(ALCcontext *context)
 {
     std::lock_guard<std::mutex> _{context->mSourceLock};
-    auto voices_end = context->mVoices->begin() +
-        context->mVoiceCount.load(std::memory_order_relaxed);
-    std::for_each(context->mVoices->begin(), voices_end,
+    std::for_each(context->mVoices.begin(), context->mVoices.end(),
         [context](ALvoice &voice) -> void
         {
             ALuint sid{voice.mSourceID.load(std::memory_order_acquire)};

alc/alc.cpp

@@ -2182,8 +2182,6 @@ static ALCenum UpdateDeviceParams(ALCdevice *device, const ALCint *attrList)
             vprops = next;
         }
 
-        auto voices = context->mVoices.get();
-        auto voices_end = voices->begin() + context->mVoiceCount.load(std::memory_order_relaxed);
         if(device->NumAuxSends < old_sends)
         {
             const ALsizei num_sends{device->NumAuxSends};
@@ -2201,7 +2199,7 @@ static ALCenum UpdateDeviceParams(ALCdevice *device, const ALCint *attrList)
                 };
                 std::for_each(voice.mChans.begin(), voice.mChans.end(), clear_chan_sends);
             };
-            std::for_each(voices->begin(), voices_end, clear_sends);
+            std::for_each(context->mVoices.begin(), context->mVoices.end(), clear_sends);
         }
         auto reset_voice = [device](ALvoice &voice) -> void
         {
@@ -2225,7 +2223,7 @@ static ALCenum UpdateDeviceParams(ALCdevice *device, const ALCint *attrList)
                     init_nfc);
             }
         };
-        std::for_each(voices->begin(), voices_end, reset_voice);
+        std::for_each(context->mVoices.begin(), context->mVoices.end(), reset_voice);
         srclock.unlock();
 
         context->mPropsClean.test_and_set(std::memory_order_release);
@@ -2378,8 +2376,7 @@ ALCcontext::~ALCcontext()
     }
     TRACE("Freed %zu voice property object%s\n", count, (count==1)?"":"s");
 
-    mVoices = nullptr;
-    mVoiceCount.store(0, std::memory_order_relaxed);
+    mVoices.clear();
 
     ALlistenerProps *lprops{mListener.Params.Update.exchange(nullptr, std::memory_order_relaxed)};
     if(lprops)
@@ -2459,7 +2456,8 @@ void ALCcontext::init()
     StartEventThrd(this);
 
 
-    allocVoices(256);
+    mVoices.reserve(256);
+    mVoices.resize(64);
 }
 
 bool ALCcontext::deinit()
@@ -2548,44 +2546,6 @@ ContextRef GetContextRef(void)
 }
 
 
-void ALCcontext::allocVoices(size_t num_voices)
-{
-    const ALsizei num_sends{mDevice->NumAuxSends};
-
-    if(mVoices && num_voices == mVoices->size())
-        return;
-
-    using ALvoiceArray = al::FlexArray<ALvoice>;
-    std::unique_ptr<ALvoiceArray> voices{ALvoiceArray::Create(num_voices)};
-
-    const size_t v_count{minz(mVoiceCount.load(std::memory_order_relaxed), num_voices)};
-    if(mVoices)
-    {
-        /* Copy the old voice data to the new storage. */
-        auto viter = std::move(mVoices->begin(), mVoices->begin()+v_count, voices->begin());
-
-        /* Clear extraneous property set sends. */
-        auto clear_sends = [num_sends](ALvoice &voice) -> void
-        {
-            std::fill(std::begin(voice.mProps.Send)+num_sends, std::end(voice.mProps.Send),
-                ALvoiceProps::SendData{});
-
-            std::fill(voice.mSend.begin()+num_sends, voice.mSend.end(), ALvoice::SendData{});
-            auto clear_chan_sends = [num_sends](ALvoice::ChannelData &chandata) -> void
-            {
-                std::fill(chandata.mWetParams.begin()+num_sends, chandata.mWetParams.end(),
-                    SendParams{});
-            };
-            std::for_each(voice.mChans.begin(), voice.mChans.end(), clear_chan_sends);
-        };
-        std::for_each(voices->begin(), viter, clear_sends);
-    }
-
-    mVoices = std::move(voices);
-    mVoiceCount.store(static_cast<ALuint>(v_count), std::memory_order_relaxed);
-}
-
-
 /************************************************
  * Standard ALC functions
  ************************************************/

alc/alcontext.h

@@ -127,8 +127,7 @@ struct ALCcontext : public al::intrusive_ref<ALCcontext> {
     std::atomic<ALvoiceProps*> mFreeVoiceProps{nullptr};
     std::atomic<ALeffectslotProps*> mFreeEffectslotProps{nullptr};
 
-    std::unique_ptr<al::FlexArray<ALvoice>> mVoices{nullptr};
-    std::atomic<ALuint> mVoiceCount{0u};
+    al::vector<ALvoice> mVoices;
 
     using ALeffectslotArray = al::FlexArray<ALeffectslot*>;
     std::atomic<ALeffectslotArray*> mActiveAuxSlots{nullptr};
@@ -163,8 +162,6 @@ struct ALCcontext : public al::intrusive_ref<ALCcontext> {
      */
     bool deinit();
 
-    void allocVoices(size_t num_voices);
-
     /**
      * Defers/suspends updates for the given context's listener and sources.
      * This does *NOT* stop mixing, but rather prevents certain property

alc/alu.cpp

@@ -1348,8 +1348,7 @@ void ProcessContext(ALCcontext *ctx, const ALuint SamplesToDo)
     ASSUME(SamplesToDo > 0);
 
     const ALeffectslotArray &auxslots = *ctx->mActiveAuxSlots.load(std::memory_order_acquire);
-    const al::span<ALvoice> voices{ctx->mVoices->data(),
-        ctx->mVoiceCount.load(std::memory_order_acquire)};
+    const al::span<ALvoice> voices{ctx->mVoices.data(), ctx->mVoices.size()};
 
     /* Process pending propery updates for objects on the context. */
     ProcessParamUpdates(ctx, auxslots, voices);
@@ -1755,9 +1754,7 @@ void aluHandleDisconnect(ALCdevice *device, const char *msg, ...)
             voice.mSourceID.store(0u, std::memory_order_relaxed);
             voice.mPlayState.store(ALvoice::Stopped, std::memory_order_release);
         };
-        std::for_each(ctx->mVoices->begin(),
-            ctx->mVoices->begin() + ctx->mVoiceCount.load(std::memory_order_acquire),
-            stop_voice);
+        std::for_each(ctx->mVoices.begin(), ctx->mVoices.end(), stop_voice);
     }
     IncrementRef(device->MixCount);
 }

alc/alu.h

@@ -269,6 +269,7 @@ struct ALvoice {
 
     ALvoice() = default;
     ALvoice(const ALvoice&) = delete;
+    ALvoice(ALvoice&& rhs) noexcept { *this = std::move(rhs); }
     ~ALvoice() { delete mUpdate.exchange(nullptr, std::memory_order_acq_rel); }
     ALvoice& operator=(const ALvoice&) = delete;
     ALvoice& operator=(ALvoice&& rhs) noexcept