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/* -*- Mode: c++ -*- */
/***************************************************************************
* events_ds.h
*
* Sun Jan 12 00:17:31 CET 2020
* Copyright 2020 André Nusser
* andre.nusser@googlemail.com
****************************************************************************/
/*
* 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 <config.h>
#include <algorithm>
#include <array>
#include <vector>
#include "events.h"
#include "id.h"
#include "memory_heap.h"
#include "range.h"
#include "instrument.h"
//! TODO: document class as a whole
//! TODO: What s does DS stand for?
// TODO: make it possible to choose sizes
class EventsDS
{
public:
EventsDS() = default; // TODO: Is this needed?
//! TODO: document all the (public) things!
template <typename T, typename... Args>
T& emplace(int ch, Args&&... args);
//! TODO: document all the (public) things!
void remove(EventID event_id);
//! TODO: document all the (public) things!
std::size_t numberOfEvents(int ch) const;
//! TODO: document all the (public) things!
template <typename T>
ContainerRange<std::vector<T>> iterateOver(int ch);
//! TODO: document all the (public) things!
const EventGroupIDs& getSampleEventGroupIDsOf(InstrumentID instrument_id) const;
//! TODO: document all the (public) things!
const EventIDs& getEventIDsOf(EventGroupID event_group_id) const;
//! TODO: document all the (public) things!
void startAddingNewGroup(InstrumentID instrument_id = InstrumentID());
private:
struct ChannelData
{
std::vector<SampleEvent> sample_events;
};
using ChannelEventIndex = std::size_t;
struct EventInfo
{
Event::Type type;
int ch;
ChannelEventIndex channel_event_index;
EventInfo(Event::Type type, int ch, ChannelEventIndex channel_event_index)
: type(type), ch(ch), channel_event_index(channel_event_index) {}
};
struct GroupData
{
EventIDs event_ids;
Event::Type type;
// SampleEvent specific data
std::size_t instrument_index;
};
// general data
std::array<ChannelData, NUM_CHANNELS> channel_data_array;
MemoryHeap<EventInfo> id_to_info;
MemoryHeap<GroupData> id_to_group_data;
// SampleEvent specific data
// TODO: maybe use something that actually has the size of the number of instruments
// Also, can we guarantee that there are at most 128 instrument ids?
std::array<EventGroupIDs, 128> instruments_sample_event_group_ids;
EventGroupID current_group_id;
InstrumentID current_groups_instrument_id;
void removeGroup(EventGroupID group_id, InstrumentID instrument_id = InstrumentID());
};
template <typename T, typename... Args>
T& EventsDS::emplace(int ch, Args&&... args)
{
if (std::is_same<T, SampleEvent>::value)
{
auto& sample_events = channel_data_array[ch].sample_events;
auto channel_event_index = sample_events.size();
sample_events.emplace_back(std::forward<Args>(args)...);
auto event_id = id_to_info.emplace(Event::Type::SampleEvent, ch, channel_event_index);
id_to_group_data.get(current_group_id).event_ids.push_back(event_id);
auto& sample_event = sample_events.back();
sample_event.id = event_id;
sample_event.group_id = current_group_id;
assert(sample_event.instrument_id == current_groups_instrument_id);
return sample_event;
}
assert(false); // TODO: This should probably be a static_assert instead?
}
template <typename T>
ContainerRange<std::vector<T>> EventsDS::iterateOver(int ch)
{
if (std::is_same<T, SampleEvent>::value)
{
auto& sample_events = channel_data_array[ch].sample_events;
return ContainerRange<std::vector<T>>(sample_events.begin(), sample_events.end());
}
}
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