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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiocacheeventhandler.h
*
* Sun Jan 3 19:57:55 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.
*/
#pragma once
#include <list>
#include <mutex>
#include <atomic>
#include "thread.h"
#include "sem.h"
#include "audiocachefile.h"
#include "audiocacheidmanager.h"
struct CacheEvent;
class AudioCacheEventHandler
: protected Thread
{
public:
AudioCacheEventHandler(AudioCacheIDManager& id_manager);
~AudioCacheEventHandler();
//! Start event handler thread.
//! This method blocks until the thread has actually been started.
void start();
//! Stop event handler thread.
//! This method blocks until the thread has actually been stopped.
void stop();
//! Set thread status and start/stop thread accordingly.
//! \param threaded Set to true to start thread or false to stop it.
void setThreaded(bool threaded);
//! Get current threaded status.
bool isThreaded() const;
//! Lock thread mutex.
//! This methods are supplied to make this class lockable by std::lock_guard
void lock();
//! Unlock thread mutex.
//! This methods are supplied to make this class lockable by std::lock_guard
void unlock();
void pushLoadNextEvent(AudioCacheFile* afile, size_t channel_index,
size_t pos, sample_t* buffer,
volatile bool* ready);
void pushCloseEvent(cacheid_t cacheid);
void setChunkSize(size_t chunksize);
size_t getChunkSize() const;
AudioCacheFile& openFile(const std::string& filename);
protected:
void clearEvents();
void handleLoadNextEvent(CacheEvent& cache_event) const;
//! Lock the mutex and calls handleCloseCache
void handleCloseEvent(CacheEvent& cache_event);
//! Close decrease the file ref and release the cache id.
void handleCloseCache(cacheid_t cacheid);
void handleEvent(CacheEvent& cache_event);
// From Thread
void thread_main() override;
void pushEvent(CacheEvent& cache_event);
AudioCacheFiles files;
std::mutex mutex;
std::list<CacheEvent> eventqueue;
std::atomic<bool> threaded{false};
Semaphore sem;
Semaphore sem_run;
bool running{false};
AudioCacheIDManager& id_manager;
size_t chunksize{1024};
};
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