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#include "audiocacheidmanager.h"
#include <limits>
#include <cassert>
void CacheBuffer::allocBack(std::size_t chunk_size)
{
back = new sample_t[chunk_size];
}
void CacheBuffer::deleteChunks() const
{
delete[] front;
delete[] back;
}
void CacheBuffer::swap() noexcept
{
std::swap(front, back);
}
AudioCacheIDManager::~AudioCacheIDManager()
{
assert(available_ids.size() == id2cache.size());
}
void AudioCacheIDManager::init(unsigned int capacity)
{
const std::lock_guard<std::mutex> guard(mutex);
id2cache.resize(capacity);
available_ids.resize(capacity);
for(int i = 0; i < static_cast<int>(capacity); ++i)
{
available_ids[i] = i;
}
}
CacheBuffer& AudioCacheIDManager::getCache(cacheid_t cacheid)
{
const std::lock_guard<std::mutex> guard(mutex);
assert(cacheid != CACHE_NOID);
assert(cacheid != CACHE_DUMMYID);
assert(cacheid >= 0);
assert(cacheid < (int)id2cache.size());
assert(id2cache[cacheid].id == cacheid);
return id2cache[cacheid];
}
cacheid_t AudioCacheIDManager::registerID(const CacheBuffer& cache)
{
const std::lock_guard<std::mutex> guard(mutex);
cacheid_t cacheid = CACHE_NOID;
if(available_ids.empty())
{
return CACHE_DUMMYID;
}
else
{
cacheid = available_ids.back();
available_ids.pop_back();
}
assert(id2cache[cacheid].id == CACHE_NOID);
id2cache[cacheid] = cache;
id2cache[cacheid].id = cacheid;
return cacheid;
}
void AudioCacheIDManager::releaseID(cacheid_t cacheid)
{
const std::lock_guard<std::mutex> guard(mutex);
assert(id2cache[cacheid].id != CACHE_NOID);
id2cache[cacheid].id = CACHE_NOID;
available_ids.push_back(cacheid);
}
void AudioCacheIDManager::disableActive()
{
for(auto& cache : id2cache)
{
if(cache.id != CACHE_NOID)
{
cache.localpos = std::numeric_limits<size_t>::max();
cache.ready = false;
}
}
}
std::vector<cacheid_t> AudioCacheIDManager::getActiveIDs()
{
std::vector<cacheid_t> active_ids;
for(auto& cache : id2cache)
{
if(cache.id != CACHE_NOID)
{
active_ids.push_back(cache.id);
}
}
return active_ids;
}
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