Applications: Move to Userland/Applications/

Userland/Applications/SoundPlayer/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(SOURCES
+    main.cpp
+    PlaybackManager.cpp
+    SampleWidget.cpp
+    SoundPlayerWidget.cpp
+)
+
+serenity_app(SoundPlayer ICON app-sound-player)
+target_link_libraries(SoundPlayer LibAudio LibGUI)

Userland/Applications/SoundPlayer/PlaybackManager.cpp

@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "PlaybackManager.h"
+
+PlaybackManager::PlaybackManager(NonnullRefPtr<Audio::ClientConnection> connection)
+    : m_connection(connection)
+{
+    m_timer = Core::Timer::construct(100, [&]() {
+        if (!m_loader)
+            return;
+        next_buffer();
+    });
+    m_timer->stop();
+}
+
+PlaybackManager::~PlaybackManager()
+{
+}
+
+void PlaybackManager::set_loader(NonnullRefPtr<Audio::Loader>&& loader)
+{
+    stop();
+    m_loader = loader;
+    if (m_loader) {
+        m_total_length = m_loader->total_samples() / static_cast<float>(m_loader->sample_rate());
+        m_timer->start();
+        load_next_buffer();
+    } else {
+        m_timer->stop();
+    }
+}
+
+void PlaybackManager::stop()
+{
+    set_paused(true);
+    m_connection->clear_buffer(true);
+    m_buffers.clear();
+    m_last_seek = 0;
+    m_next_buffer = nullptr;
+    m_current_buffer = nullptr;
+    m_next_ptr = 0;
+
+    if (m_loader)
+        m_loader->reset();
+}
+
+void PlaybackManager::play()
+{
+    set_paused(false);
+}
+
+void PlaybackManager::loop(bool loop)
+{
+    m_loop = loop;
+}
+
+void PlaybackManager::seek(const int position)
+{
+    if (!m_loader)
+        return;
+
+    m_last_seek = position;
+    bool paused_state = m_paused;
+    set_paused(true);
+
+    m_connection->clear_buffer(true);
+    m_next_buffer = nullptr;
+    m_current_buffer = nullptr;
+    m_next_ptr = 0;
+    m_buffers.clear();
+    m_loader->seek(position);
+
+    if (!paused_state)
+        set_paused(false);
+}
+
+void PlaybackManager::pause()
+{
+    set_paused(true);
+}
+
+void PlaybackManager::remove_dead_buffers()
+{
+    int id = m_connection->get_playing_buffer();
+    int current_id = -1;
+    if (m_current_buffer)
+        current_id = m_current_buffer->shbuf_id();
+
+    if (id >= 0 && id != current_id) {
+        while (!m_buffers.is_empty()) {
+            --m_next_ptr;
+            auto buffer = m_buffers.take_first();
+
+            if (buffer->shbuf_id() == id) {
+                m_current_buffer = buffer;
+                break;
+            }
+        }
+    }
+}
+
+void PlaybackManager::load_next_buffer()
+{
+    if (m_buffers.size() < 10) {
+        for (int i = 0; i < 20 && m_loader->loaded_samples() < m_loader->total_samples(); i++) {
+            auto buffer = m_loader->get_more_samples(PLAYBACK_MANAGER_BUFFER_SIZE);
+            if (buffer)
+                m_buffers.append(buffer);
+        }
+    }
+
+    if (m_next_ptr < m_buffers.size()) {
+        m_next_buffer = m_buffers.at(m_next_ptr++);
+    } else {
+        m_next_buffer = nullptr;
+    }
+}
+
+void PlaybackManager::set_paused(bool paused)
+{
+    if (!m_next_buffer && m_loader)
+        load_next_buffer();
+
+    m_paused = paused;
+    m_connection->set_paused(paused);
+}
+
+bool PlaybackManager::toggle_pause()
+{
+    if (m_paused) {
+        play();
+    } else {
+        pause();
+    }
+    return m_paused;
+}
+
+void PlaybackManager::next_buffer()
+{
+    if (on_update)
+        on_update();
+
+    if (m_paused)
+        return;
+
+    remove_dead_buffers();
+    if (!m_next_buffer) {
+        if (!m_connection->get_remaining_samples() && !m_paused) {
+            dbgln("Exhausted samples :^)");
+            if (m_loop)
+                seek(0);
+            else
+                stop();
+        }
+
+        return;
+    }
+
+    bool enqueued = m_connection->try_enqueue(*m_next_buffer);
+    if (!enqueued)
+        return;
+
+    load_next_buffer();
+}

Userland/Applications/SoundPlayer/PlaybackManager.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/Vector.h>
+#include <LibAudio/Buffer.h>
+#include <LibAudio/ClientConnection.h>
+#include <LibAudio/Loader.h>
+#include <LibCore/Timer.h>
+
+#define PLAYBACK_MANAGER_BUFFER_SIZE 64 * KiB
+#define PLAYBACK_MANAGER_RATE 44100
+
+class PlaybackManager final {
+public:
+    PlaybackManager(NonnullRefPtr<Audio::ClientConnection>);
+    ~PlaybackManager();
+
+    void play();
+    void stop();
+    void pause();
+    void seek(const int position);
+    void loop(bool);
+    bool toggle_pause();
+    void set_loader(NonnullRefPtr<Audio::Loader>&&);
+
+    int last_seek() const { return m_last_seek; }
+    bool is_paused() const { return m_paused; }
+    float total_length() const { return m_total_length; }
+    RefPtr<Audio::Buffer> current_buffer() const { return m_current_buffer; }
+
+    NonnullRefPtr<Audio::ClientConnection> connection() const { return m_connection; }
+
+    Function<void()> on_update;
+
+private:
+    void next_buffer();
+    void set_paused(bool);
+    void load_next_buffer();
+    void remove_dead_buffers();
+
+    bool m_paused { true };
+    bool m_loop = { false };
+    size_t m_next_ptr { 0 };
+    size_t m_last_seek { 0 };
+    float m_total_length { 0 };
+    RefPtr<Audio::Loader> m_loader { nullptr };
+    NonnullRefPtr<Audio::ClientConnection> m_connection;
+    RefPtr<Audio::Buffer> m_next_buffer;
+    RefPtr<Audio::Buffer> m_current_buffer;
+    Vector<RefPtr<Audio::Buffer>> m_buffers;
+    RefPtr<Core::Timer> m_timer;
+};

Userland/Applications/SoundPlayer/SampleWidget.cpp

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "SampleWidget.h"
+#include <LibAudio/Buffer.h>
+#include <LibGUI/Painter.h>
+#include <math.h>
+
+SampleWidget::SampleWidget()
+{
+}
+
+SampleWidget::~SampleWidget()
+{
+}
+
+void SampleWidget::paint_event(GUI::PaintEvent& event)
+{
+    GUI::Frame::paint_event(event);
+    GUI::Painter painter(*this);
+
+    painter.add_clip_rect(event.rect());
+    painter.fill_rect(frame_inner_rect(), Color::Black);
+
+    float sample_max = 0;
+    int count = 0;
+    int x_offset = frame_inner_rect().x();
+    int x = x_offset;
+    int y_offset = frame_inner_rect().center().y();
+
+    if (m_buffer) {
+        int samples_per_pixel = m_buffer->sample_count() / frame_inner_rect().width();
+        for (int sample_index = 0; sample_index < m_buffer->sample_count() && (x - x_offset) < frame_inner_rect().width(); ++sample_index) {
+            float sample = fabsf((float)m_buffer->samples()[sample_index].left);
+
+            sample_max = max(sample, sample_max);
+            ++count;
+
+            if (count >= samples_per_pixel) {
+                Gfx::IntPoint min_point = { x, y_offset + static_cast<int>(-sample_max * frame_inner_rect().height() / 2) };
+                Gfx::IntPoint max_point = { x++, y_offset + static_cast<int>(sample_max * frame_inner_rect().height() / 2) };
+                painter.draw_line(min_point, max_point, Color::Green);
+
+                count = 0;
+                sample_max = 0;
+            }
+        }
+    } else {
+        painter.draw_line({ x, y_offset }, { frame_inner_rect().width(), y_offset }, Color::Green);
+    }
+}
+
+void SampleWidget::set_buffer(Audio::Buffer* buffer)
+{
+    if (m_buffer == buffer)
+        return;
+    m_buffer = buffer;
+    update();
+}

Userland/Applications/SoundPlayer/SampleWidget.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibGUI/Frame.h>
+
+namespace Audio {
+class Buffer;
+}
+
+class SampleWidget final : public GUI::Frame {
+    C_OBJECT(SampleWidget)
+public:
+    virtual ~SampleWidget() override;
+
+    void set_buffer(Audio::Buffer*);
+
+private:
+    SampleWidget();
+    virtual void paint_event(GUI::PaintEvent&) override;
+
+    RefPtr<Audio::Buffer> m_buffer;
+};

Userland/Applications/SoundPlayer/SoundPlayerWidget.cpp

@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "SoundPlayerWidget.h"
+#include <AK/StringBuilder.h>
+#include <LibCore/MimeData.h>
+#include <LibGUI/BoxLayout.h>
+#include <LibGUI/Button.h>
+#include <LibGUI/Label.h>
+#include <LibGUI/MessageBox.h>
+#include <math.h>
+
+SoundPlayerWidget::SoundPlayerWidget(GUI::Window& window, NonnullRefPtr<Audio::ClientConnection> connection)
+    : m_window(window)
+    , m_connection(connection)
+    , m_manager(connection)
+{
+    set_fill_with_background_color(true);
+    set_layout<GUI::VerticalBoxLayout>();
+    layout()->set_margins({ 2, 2, 2, 2 });
+
+    auto& status_widget = add<GUI::Widget>();
+    status_widget.set_fill_with_background_color(true);
+    status_widget.set_layout<GUI::HorizontalBoxLayout>();
+
+    m_elapsed = status_widget.add<GUI::Label>();
+    m_elapsed->set_frame_shape(Gfx::FrameShape::Container);
+    m_elapsed->set_frame_shadow(Gfx::FrameShadow::Sunken);
+    m_elapsed->set_frame_thickness(2);
+    m_elapsed->set_fixed_width(80);
+
+    auto& sample_widget_container = status_widget.add<GUI::Widget>();
+    sample_widget_container.set_layout<GUI::HorizontalBoxLayout>();
+
+    m_sample_widget = sample_widget_container.add<SampleWidget>();
+
+    m_remaining = status_widget.add<GUI::Label>();
+    m_remaining->set_frame_shape(Gfx::FrameShape::Container);
+    m_remaining->set_frame_shadow(Gfx::FrameShadow::Sunken);
+    m_remaining->set_frame_thickness(2);
+    m_remaining->set_fixed_width(80);
+
+    m_slider = add<Slider>(Orientation::Horizontal);
+    m_slider->set_min(0);
+    m_slider->set_enabled(false);
+    m_slider->on_knob_released = [&](int value) { m_manager.seek(denormalize_rate(value)); };
+
+    auto& control_widget = add<GUI::Widget>();
+    control_widget.set_fill_with_background_color(true);
+    control_widget.set_layout<GUI::HorizontalBoxLayout>();
+    control_widget.set_fixed_height(30);
+    control_widget.layout()->set_margins({ 10, 2, 10, 2 });
+    control_widget.layout()->set_spacing(10);
+
+    m_play = control_widget.add<GUI::Button>();
+    m_play->set_icon(*m_pause_icon);
+    m_play->set_enabled(false);
+    m_play->on_click = [this](auto) {
+        m_play->set_icon(m_manager.toggle_pause() ? *m_play_icon : *m_pause_icon);
+    };
+
+    m_stop = control_widget.add<GUI::Button>();
+    m_stop->set_enabled(false);
+    m_stop->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/stop.png"));
+    m_stop->on_click = [this](auto) { m_manager.stop(); };
+
+    m_status = add<GUI::Label>();
+    m_status->set_frame_shape(Gfx::FrameShape::Box);
+    m_status->set_frame_shadow(Gfx::FrameShadow::Raised);
+    m_status->set_frame_thickness(4);
+    m_status->set_text_alignment(Gfx::TextAlignment::CenterLeft);
+    m_status->set_fixed_height(18);
+    m_status->set_text("No file open!");
+
+    update_position(0);
+
+    m_manager.on_update = [&]() { update_ui(); };
+}
+
+SoundPlayerWidget::~SoundPlayerWidget()
+{
+}
+
+SoundPlayerWidget::Slider::~Slider()
+{
+}
+
+void SoundPlayerWidget::hide_scope(bool hide)
+{
+    m_sample_widget->set_visible(!hide);
+}
+
+void SoundPlayerWidget::open_file(String path)
+{
+    NonnullRefPtr<Audio::Loader> loader = Audio::Loader::create(path);
+    if (loader->has_error() || !loader->sample_rate()) {
+        const String error_string = loader->error_string();
+        GUI::MessageBox::show(window(),
+            String::formatted("Failed to load audio file: {} ({})", path, error_string.is_null() ? "Unknown error" : error_string),
+            "Filetype error", GUI::MessageBox::Type::Error);
+        return;
+    }
+
+    m_sample_ratio = PLAYBACK_MANAGER_RATE / static_cast<float>(loader->sample_rate());
+
+    m_slider->set_max(normalize_rate(static_cast<int>(loader->total_samples())));
+    m_slider->set_enabled(true);
+    m_play->set_enabled(true);
+    m_stop->set_enabled(true);
+
+    m_window.set_title(String::formatted("{} - SoundPlayer", loader->file()->filename()));
+    m_status->set_text(String::formatted(
+        "Sample rate {}Hz, {} channel(s), {} bits per sample",
+        loader->sample_rate(),
+        loader->num_channels(),
+        loader->bits_per_sample()));
+
+    m_manager.set_loader(move(loader));
+    update_position(0);
+}
+
+void SoundPlayerWidget::drop_event(GUI::DropEvent& event)
+{
+    event.accept();
+    window()->move_to_front();
+
+    if (event.mime_data().has_urls()) {
+        auto urls = event.mime_data().urls();
+        if (urls.is_empty())
+            return;
+        open_file(urls.first().path());
+    }
+}
+
+int SoundPlayerWidget::normalize_rate(int rate) const
+{
+    return static_cast<int>(rate * m_sample_ratio);
+}
+
+int SoundPlayerWidget::denormalize_rate(int rate) const
+{
+    return static_cast<int>(rate / m_sample_ratio);
+}
+
+void SoundPlayerWidget::update_ui()
+{
+    m_sample_widget->set_buffer(m_manager.current_buffer());
+    m_play->set_icon(m_manager.is_paused() ? *m_play_icon : *m_pause_icon);
+    update_position(m_manager.connection()->get_played_samples());
+}
+
+void SoundPlayerWidget::update_position(const int position)
+{
+    int total_norm_samples = position + normalize_rate(m_manager.last_seek());
+    float seconds = (total_norm_samples / static_cast<float>(PLAYBACK_MANAGER_RATE));
+    float remaining_seconds = m_manager.total_length() - seconds;
+
+    m_elapsed->set_text(String::formatted(
+        "Elapsed:\n{}:{:02}.{:02}",
+        static_cast<int>(seconds / 60),
+        static_cast<int>(seconds) % 60,
+        static_cast<int>(seconds * 100) % 100));
+
+    m_remaining->set_text(String::formatted(
+        "Remaining:\n{}:{:02}.{:02}",
+        static_cast<int>(remaining_seconds / 60),
+        static_cast<int>(remaining_seconds) % 60,
+        static_cast<int>(remaining_seconds * 100) % 100));
+
+    m_slider->set_value(total_norm_samples);
+}

Userland/Applications/SoundPlayer/SoundPlayerWidget.h

@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "PlaybackManager.h"
+#include "SampleWidget.h"
+#include <LibGUI/Button.h>
+#include <LibGUI/Label.h>
+#include <LibGUI/Slider.h>
+#include <LibGUI/Widget.h>
+#include <LibGUI/Window.h>
+
+class SoundPlayerWidget final : public GUI::Widget {
+    C_OBJECT(SoundPlayerWidget)
+public:
+    virtual ~SoundPlayerWidget() override;
+    void open_file(String path);
+    void hide_scope(bool);
+    PlaybackManager& manager() { return m_manager; }
+
+private:
+    explicit SoundPlayerWidget(GUI::Window&, NonnullRefPtr<Audio::ClientConnection>);
+
+    virtual void drop_event(GUI::DropEvent&) override;
+
+    void update_position(const int position);
+    void update_ui();
+    int normalize_rate(int) const;
+    int denormalize_rate(int) const;
+
+    class Slider final : public GUI::Slider {
+        C_OBJECT(Slider)
+    public:
+        virtual ~Slider() override;
+        Function<void(int)> on_knob_released;
+        void set_value(int value)
+        {
+            if (!knob_dragging())
+                GUI::Slider::set_value(value);
+        }
+
+    protected:
+        Slider(Orientation orientation)
+            : GUI::Slider(orientation)
+        {
+        }
+
+        virtual void mouseup_event(GUI::MouseEvent& event) override
+        {
+            if (on_knob_released && is_enabled())
+                on_knob_released(value());
+
+            GUI::Slider::mouseup_event(event);
+        }
+    };
+
+    GUI::Window& m_window;
+    NonnullRefPtr<Audio::ClientConnection> m_connection;
+    PlaybackManager m_manager;
+    float m_sample_ratio { 1.0 };
+    RefPtr<GUI::Label> m_status;
+    RefPtr<GUI::Label> m_elapsed;
+    RefPtr<GUI::Label> m_remaining;
+    RefPtr<Slider> m_slider;
+    RefPtr<SampleWidget> m_sample_widget;
+    RefPtr<Gfx::Bitmap> m_play_icon { Gfx::Bitmap::load_from_file("/res/icons/16x16/play.png") };
+    RefPtr<Gfx::Bitmap> m_pause_icon { Gfx::Bitmap::load_from_file("/res/icons/16x16/pause.png") };
+    RefPtr<GUI::Button> m_play;
+    RefPtr<GUI::Button> m_stop;
+};

Userland/Applications/SoundPlayer/main.cpp

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "SoundPlayerWidget.h"
+#include <LibAudio/ClientConnection.h>
+#include <LibGUI/Action.h>
+#include <LibGUI/Application.h>
+#include <LibGUI/FilePicker.h>
+#include <LibGUI/Menu.h>
+#include <LibGUI/MenuBar.h>
+#include <LibGUI/Window.h>
+#include <LibGfx/CharacterBitmap.h>
+#include <stdio.h>
+
+int main(int argc, char** argv)
+{
+    if (pledge("stdio shared_buffer accept rpath thread unix cpath fattr", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    auto app = GUI::Application::construct(argc, argv);
+
+    if (pledge("stdio shared_buffer accept rpath thread unix", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    auto audio_client = Audio::ClientConnection::construct();
+    audio_client->handshake();
+
+    if (pledge("stdio shared_buffer accept rpath thread", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    auto app_icon = GUI::Icon::default_icon("app-sound-player");
+
+    auto window = GUI::Window::construct();
+    window->set_title("Sound Player");
+    window->set_resizable(false);
+    window->resize(350, 140);
+    window->set_icon(app_icon.bitmap_for_size(16));
+
+    auto menubar = GUI::MenuBar::construct();
+    auto& app_menu = menubar->add_menu("Sound Player");
+    auto& player = window->set_main_widget<SoundPlayerWidget>(window, audio_client);
+
+    if (argc > 1) {
+        String path = argv[1];
+        player.open_file(path);
+        player.manager().play();
+    }
+
+    auto hide_scope = GUI::Action::create_checkable("Hide scope", { Mod_Ctrl, Key_H }, [&](auto& action) {
+        player.hide_scope(action.is_checked());
+    });
+
+    app_menu.add_action(GUI::CommonActions::make_open_action([&](auto&) {
+        Optional<String> path = GUI::FilePicker::get_open_filepath(window, "Open sound file...");
+        if (path.has_value()) {
+            player.open_file(path.value());
+        }
+    }));
+    app_menu.add_action(move(hide_scope));
+    app_menu.add_separator();
+    app_menu.add_action(GUI::CommonActions::make_quit_action([&](auto&) {
+        app->quit();
+    }));
+
+    auto& playback_menu = menubar->add_menu("Playback");
+
+    auto loop = GUI::Action::create_checkable("Loop", { Mod_Ctrl, Key_R }, [&](auto& action) {
+        player.manager().loop(action.is_checked());
+    });
+
+    playback_menu.add_action(move(loop));
+
+    auto& help_menu = menubar->add_menu("Help");
+    help_menu.add_action(GUI::CommonActions::make_about_action("Sound Player", app_icon, window));
+
+    app->set_menubar(move(menubar));
+
+    window->show();
+    return app->exec();
+}