Add moodbar

src/moodbar/moodbarcontroller.cpp

@@ -0,0 +1,91 @@
+/* This file was part of Clementine.
+   Copyright 2012, David Sansome <me@davidsansome.com>
+
+   Strawberry is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Strawberry is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <QObject>
+#include <QByteArray>
+#include <QUrl>
+
+#include "core/application.h"
+#include "core/closure.h"
+#include "core/logging.h"
+#include "core/player.h"
+#include "playlist/playlistmanager.h"
+
+#include "moodbarcontroller.h"
+#include "moodbarloader.h"
+#include "moodbarpipeline.h"
+
+MoodbarController::MoodbarController(Application* app, QObject* parent)
+    : QObject(parent),
+    app_(app) {
+
+  connect(app_->playlist_manager(), SIGNAL(CurrentSongChanged(Song)), SLOT(CurrentSongChanged(Song)));
+  connect(app_->player(), SIGNAL(Stopped()), SLOT(PlaybackStopped()));
+
+}
+
+void MoodbarController::CurrentSongChanged(const Song& song) {
+
+  QByteArray data;
+  MoodbarPipeline* pipeline = nullptr;
+  const MoodbarLoader::Result result = app_->moodbar_loader()->Load(song.url(), &data, &pipeline);
+
+  switch (result) {
+    case MoodbarLoader::CannotLoad:
+      emit CurrentMoodbarDataChanged(QByteArray());
+      break;
+
+    case MoodbarLoader::Loaded:
+      emit CurrentMoodbarDataChanged(data);
+      break;
+
+    case MoodbarLoader::WillLoadAsync:
+      // Emit an empty array for now so the GUI reverts to a normal progress
+      // bar.  Our slot will be called when the data is actually loaded.
+      emit CurrentMoodbarDataChanged(QByteArray());
+
+      NewClosure(pipeline, SIGNAL(Finished(bool)), this, SLOT(AsyncLoadComplete(MoodbarPipeline*, QUrl)), pipeline, song.url());
+      break;
+  }
+
+}
+
+void MoodbarController::PlaybackStopped() {
+  emit CurrentMoodbarDataChanged(QByteArray());
+}
+
+void MoodbarController::AsyncLoadComplete(MoodbarPipeline* pipeline, const QUrl& url) {
+
+  // Is this song still playing?
+  PlaylistItemPtr current_item = app_->player()->GetCurrentItem();
+  if (current_item && current_item->Url() != url) {
+    return;
+  }
+  // Did we stop the song?
+  switch(app_->player()->GetState()) {
+    case Engine::Error:
+    case Engine::Empty:
+    case Engine::Idle:
+      return;
+
+    default:
+      break;
+  }
+
+  emit CurrentMoodbarDataChanged(pipeline->data());
+
+}