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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiocacheidmanager.cc
*
* Tue Jan 5 10:59:37 CET 2016
* Copyright 2016 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#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()); // All ids should be released.
}
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); // Make sure it is not already in use
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); // Test if it wasn't already released.
id2cache[cacheid].id = CACHE_NOID;
available_ids.push_back(cacheid);
}
void AudioCacheIDManager::disableActive()
{
// Run through all active CacheBuffers and disable them.
for(auto& cache : id2cache)
{
if(cache.id != CACHE_NOID)
{
// Force use of nodata in all of the rest of the next() calls:
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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