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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* event.h
*
* Sat Sep 18 22:02:16 CEST 2010
* Copyright 2010 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 <map>
#include <stdio.h>
#include <string>
#include <mutex>
#include "audiofile.h"
#include "audio.h"
#include "audiocache.h"
typedef unsigned int timepos_t;
class Event
{
public:
Event(channel_t channel, timepos_t offset = 0)
: channel(channel), offset(offset)
{
}
virtual ~Event()
{
}
typedef enum
{
sample
} type_t;
virtual type_t getType() const = 0;
channel_t channel;
timepos_t offset; //< Global position (ie. not relative to buffer)
};
class EventSample
: public Event
{
public:
EventSample(channel_t c, float g, AudioFile* af,
const std::string& grp, std::size_t instrument_id)
: Event(c)
, cache_id(CACHE_NOID)
, gain(g)
, t(0)
, file(af)
, group(grp)
, rampdown_count(-1)
, ramp_length(0)
, instrument_id(instrument_id)
{
}
Event::type_t getType() const
{
return Event::sample;
}
bool rampdownInProgress() const
{
return rampdown_count != -1;
}
cacheid_t cache_id;
sample_t* buffer;
std::size_t buffer_size;
std::size_t buffer_ptr{0}; //< Internal pointer into the current buffer
std::size_t sample_size{0}; //< Total number of audio samples in this sample.
float gain;
unsigned int t; //< Internal sample position.
AudioFile* file;
std::string group;
int rampdown_count;
int ramp_length;
std::size_t rampdown_offset{0};
float scale{1.0f};
std::size_t instrument_id;
};
class EventQueue
{
public:
void post(Event* event, timepos_t time);
Event* take(timepos_t time);
bool hasEvent(timepos_t time);
size_t getSize() const
{
return queue.size();
}
private:
std::multimap<timepos_t, Event*> queue;
std::mutex mutex;
};
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