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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2019-2020, William McPherson <willmcpherson2@gmail.com>
* Copyright (c) 2021, JJ Roberts-White <computerfido@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "TrackManager.h"
#include "Applications/Piano/Music.h"
TrackManager::TrackManager()
{
add_track();
}
void TrackManager::time_forward(int amount)
{
int new_value = (static_cast<int>(m_time) + amount) % roll_length;
if (new_value < 0) { // If the new time value is negative add roll_length to wrap around
m_time = roll_length + new_value;
} else {
m_time = new_value;
}
}
void TrackManager::fill_buffer(Span<Sample> buffer)
{
memset(buffer.data(), 0, buffer_size);
for (size_t i = 0; i < buffer.size(); ++i) {
for (auto& track : m_tracks)
track->fill_sample(buffer[i]);
if (++m_time >= roll_length) {
m_time = 0;
if (!m_should_loop)
break;
}
}
memcpy(m_current_back_buffer.data(), buffer.data(), buffer_size);
swap(m_current_front_buffer, m_current_back_buffer);
}
void TrackManager::reset()
{
memset(m_front_buffer.data(), 0, buffer_size);
memset(m_back_buffer.data(), 0, buffer_size);
m_current_front_buffer = m_front_buffer.span();
m_current_back_buffer = m_back_buffer.span();
m_time = 0;
for (auto& track : m_tracks)
track->reset();
}
void TrackManager::set_keyboard_note(int note, Switch note_switch)
{
m_tracks[m_current_track]->set_keyboard_note(note, note_switch);
}
void TrackManager::set_octave(Direction direction)
{
if (direction == Up) {
if (m_octave < octave_max)
++m_octave;
} else {
if (m_octave > octave_min)
--m_octave;
}
}
void TrackManager::set_octave(int octave)
{
if (octave <= octave_max && octave >= octave_min) {
m_octave = octave;
}
}
void TrackManager::add_track()
{
m_tracks.append(make<Track>(m_time));
}
int TrackManager::next_track_index()
{
auto next_track_index = m_current_track + 1;
if (next_track_index >= m_tracks.size())
return 0;
else
return next_track_index;
}
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