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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <AK/Vector.h>
30#include <LibAudio/ClientConnection.h>
31#include <LibAudio/WavLoader.h>
32#include <LibCore/Timer.h>
33
34#define PLAYBACK_MANAGER_BUFFER_SIZE 64 * KB
35#define PLAYBACK_MANAGER_RATE 44100
36
37class PlaybackManager final {
38public:
39 PlaybackManager(NonnullRefPtr<Audio::ClientConnection>);
40 ~PlaybackManager();
41
42 void play();
43 void stop();
44 void pause();
45 void seek(const int position);
46 bool toggle_pause();
47 void set_loader(OwnPtr<Audio::WavLoader>&&);
48
49 int last_seek() const { return m_last_seek; }
50 bool is_paused() const { return m_paused; }
51 float total_length() const { return m_total_length; }
52 RefPtr<Audio::Buffer> current_buffer() const { return m_current_buffer; }
53
54 NonnullRefPtr<Audio::ClientConnection> connection() const { return m_connection; }
55
56 Function<void()> on_update;
57
58private:
59 void next_buffer();
60 void set_paused(bool);
61 void load_next_buffer();
62 void remove_dead_buffers();
63
64 bool m_paused { true };
65 size_t m_next_ptr { 0 };
66 size_t m_last_seek { 0 };
67 float m_total_length { 0 };
68 OwnPtr<Audio::WavLoader> m_loader { nullptr };
69 NonnullRefPtr<Audio::ClientConnection> m_connection;
70 RefPtr<Audio::Buffer> m_next_buffer;
71 RefPtr<Audio::Buffer> m_current_buffer;
72 Vector<RefPtr<Audio::Buffer>> m_buffers;
73 RefPtr<Core::Timer> m_timer;
74};