Ladybird: Rename classes ending with Ladybird

Now that all the classes for Ladybird are in the Ladybird namespace, we
don't need them named as Ladybird::FooBarLadybird. For the Qt-specific
classes, we can tack on a Qt at the end for clarity, but FontPlugin and
ImageCodecPlugin no longer have anything to do with Qt.

Ladybird/AudioCodecPluginQt.cpp

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "AudioCodecPluginQt.h"
+#include "AudioThread.h"
+#include <LibAudio/Loader.h>
+
+namespace Ladybird {
+
+ErrorOr<NonnullOwnPtr<AudioCodecPluginQt>> AudioCodecPluginQt::create(NonnullRefPtr<Audio::Loader> loader)
+{
+    auto audio_thread = TRY(AudioThread::create(move(loader)));
+    audio_thread->start();
+
+    return adopt_nonnull_own_or_enomem(new (nothrow) AudioCodecPluginQt(move(audio_thread)));
+}
+
+AudioCodecPluginQt::AudioCodecPluginQt(NonnullOwnPtr<AudioThread> audio_thread)
+    : m_audio_thread(move(audio_thread))
+{
+    connect(m_audio_thread, &AudioThread::playback_position_updated, this, [this](auto position) {
+        if (on_playback_position_updated)
+            on_playback_position_updated(position);
+    });
+}
+
+AudioCodecPluginQt::~AudioCodecPluginQt()
+{
+    m_audio_thread->stop().release_value_but_fixme_should_propagate_errors();
+}
+
+void AudioCodecPluginQt::resume_playback()
+{
+    m_audio_thread->queue_task({ AudioTask::Type::Play }).release_value_but_fixme_should_propagate_errors();
+}
+
+void AudioCodecPluginQt::pause_playback()
+{
+    m_audio_thread->queue_task({ AudioTask::Type::Pause }).release_value_but_fixme_should_propagate_errors();
+}
+
+void AudioCodecPluginQt::set_volume(double volume)
+{
+
+    AudioTask task { AudioTask::Type::Volume };
+    task.data = volume;
+
+    m_audio_thread->queue_task(move(task)).release_value_but_fixme_should_propagate_errors();
+}
+
+void AudioCodecPluginQt::seek(double position)
+{
+    AudioTask task { AudioTask::Type::Seek };
+    task.data = position;
+
+    m_audio_thread->queue_task(move(task)).release_value_but_fixme_should_propagate_errors();
+}
+
+Duration AudioCodecPluginQt::duration()
+{
+    return m_audio_thread->duration();
+}
+
+}