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Code Issues Activity Actions

Piano: Add Play/Pause, Forward and Back buttons

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Piano now has a toolbar allowing the playback to be paused,
or to be stepped forward or back a note.
This commit is contained in:
JJ Roberts-White 2021-07-11 12:58:17 +10:00 • committed by Ali Mohammad Pur
parent 54c005754a
commit 74f1f2b5e2
10 changed files with 234 additions and 69 deletions
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12
Userland/Applications/Piano/TrackManager.cpp
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@ -1,6 +1,7 @@
/*
* 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>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -16,6 +17,17 @@ TrackManager::~TrackManager()
{
}
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 negaive 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);