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Copy pathSoundSourcePool.cpp
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143 lines (117 loc) · 2.82 KB
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#include "Sound/SoundSourcePool.h"
#include "Sound/SoundClip.h"
#include "Sound/SoundSource.h"
namespace sh::sound
{
struct SoundSourcePool::PoolItem
{
PoolItem() :
source(),
onClipDestroyListener()
{
onClipDestroyListener.SetCallback(
[this](const core::SObject*)
{
source.ClearBuffer();
clip = nullptr;
}
);
}
void BindClip(const SoundClip* newClip)
{
UnbindClip();
clip = newClip;
if (clip != nullptr)
clip->onDestroy.Register(onClipDestroyListener);
}
void UnbindClip()
{
if (clip != nullptr)
clip->onDestroy.UnRegister(onClipDestroyListener);
clip = nullptr;
}
SoundSource source;
core::Observer<false, const core::SObject*>::Listener onClipDestroyListener;
const SoundClip* clip = nullptr;
uint32_t generation = 1;
bool bInUse = false;
};
SH_SOUND_API SoundSourcePool::SoundSourcePool() = default;
SH_SOUND_API SoundSourcePool::~SoundSourcePool()
{
Clear();
}
SH_SOUND_API auto SoundSourcePool::Acquire(const SoundClip* clip) -> Handle
{
CollectFinishedSources();
uint32_t index = 0;
if (freeIndices.empty())
{
index = static_cast<uint32_t>(items.size());
items.push_back(std::make_unique<PoolItem>());
}
else
{
index = freeIndices.back();
freeIndices.pop_back();
}
PoolItem& item = *items[index];
item.source.ClearBuffer();
item.BindClip(clip);
item.bInUse = true;
return Handle{ index, item.generation };
}
SH_SOUND_API void SoundSourcePool::Release(Handle handle)
{
if (!IsHandleValid(handle))
return;
PoolItem& item = *items[handle.index];
item.UnbindClip();
item.source.ClearBuffer();
item.bInUse = false;
++item.generation;
freeIndices.push_back(handle.index);
}
SH_SOUND_API void SoundSourcePool::Clear()
{
for (auto& item : items)
{
if (item != nullptr)
item->UnbindClip();
}
freeIndices.clear();
items.clear();
}
SH_SOUND_API auto SoundSourcePool::GetSource(Handle handle) -> SoundSource*
{
if (!IsHandleValid(handle))
return nullptr;
return &items[handle.index]->source;
}
SH_SOUND_API auto SoundSourcePool::GetSource(Handle handle) const -> const SoundSource*
{
if (!IsHandleValid(handle))
return nullptr;
return &items[handle.index]->source;
}
void SoundSourcePool::CollectFinishedSources()
{
for (uint32_t i = 0; i < items.size(); ++i)
{
const auto& item = items[i];
if (item == nullptr || !item->bInUse)
continue;
if (item->source.GetState() == SoundState::Stopped)
Release(Handle{ i, item->generation });
}
}
auto SoundSourcePool::IsHandleValid(Handle handle) const -> bool
{
if (!handle.IsValid() || handle.index >= items.size())
return false;
const auto& item = items[handle.index];
if (item == nullptr || !item->bInUse)
return false;
return item->generation == handle.generation;
}
}//namespace