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https://github.com/RGBCube/serenity
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314b8a374b
The shuffling algorithm uses a naïve bloom filter to provide random uniformity, avoiding items that were recently played. With 32 bits, double hashing, and an error rate of ~10%, this bloom filter should be able to hold around ~16 keys, which should be sufficient to give the illusion of fairness to the shuffling algorithm. This avoids having to shuffle the playlist itself (user might have spent quite a bit of time to sort them, so it's not a good idea to mess with it), or having to create a proxy model that shuffles (that could potentially use quite a bit of memory).
89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
/*
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* Copyright (c) 2021, Cesar Torres <shortanemoia@protonmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "PlaybackManager.h"
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#include "Playlist.h"
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#include "PlaylistWidget.h"
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#include <AK/RefPtr.h>
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class Player {
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public:
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enum class PlayState {
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NoFileLoaded,
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Paused,
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Stopped,
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Playing,
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};
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enum class LoopMode {
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None,
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File,
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Playlist,
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};
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enum class ShuffleMode {
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None,
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Shuffling,
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};
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explicit Player(Audio::ClientConnection& audio_client_connection);
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virtual ~Player() { }
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void play_file_path(StringView path);
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Playlist& playlist() { return m_playlist; }
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StringView loaded_filename() const { return m_loaded_filename; }
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PlayState play_state() const { return m_play_state; }
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void set_play_state(PlayState);
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LoopMode loop_mode() const { return m_loop_mode; }
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void set_loop_mode(LoopMode);
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ShuffleMode shuffle_mode() const { return m_shuffle_mode; }
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void set_shuffle_mode(ShuffleMode);
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double volume() const { return m_volume; }
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void set_volume(double value);
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void play();
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void pause();
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void toggle_pause();
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void stop();
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void seek(int sample);
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virtual void play_state_changed(PlayState) = 0;
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virtual void loop_mode_changed(LoopMode) = 0;
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virtual void time_elapsed(int) = 0;
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virtual void file_name_changed(StringView) = 0;
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virtual void playlist_loaded(StringView, bool) = 0;
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virtual void audio_load_error(StringView, StringView) = 0;
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virtual void shuffle_mode_changed(ShuffleMode) = 0;
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virtual void volume_changed(double) = 0;
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virtual void total_samples_changed(int) = 0;
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virtual void sound_buffer_played(RefPtr<Audio::Buffer>, [[maybe_unused]] int sample_rate, [[maybe_unused]] int samples_played) = 0;
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protected:
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void done_initializing()
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{
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set_play_state(PlayState::NoFileLoaded);
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set_loop_mode(LoopMode::None);
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time_elapsed(0);
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set_volume(1.);
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}
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private:
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Playlist m_playlist;
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PlayState m_play_state;
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LoopMode m_loop_mode;
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ShuffleMode m_shuffle_mode;
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Audio::ClientConnection& m_audio_client_connection;
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PlaybackManager m_playback_manager;
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StringView m_loaded_filename;
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double m_volume { 0 };
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};
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