strawberry-audio-player-win.../src/core/songloader.h

162 lines
4.5 KiB
C++

/*
* Strawberry Music Player
* This file was part of Clementine.
* Copyright 2010, David Sansome <me@davidsansome.com>
* Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
*
* 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/>.
*
*/
#ifndef SONGLOADER_H
#define SONGLOADER_H
#include "config.h"
#include <memory>
#include <functional>
#include <glib.h>
#ifdef HAVE_GSTREAMER
# include <gst/gst.h>
#endif
#include <QtGlobal>
#include <QObject>
#include <QThreadPool>
#include <QByteArray>
#include <QSet>
#include <QString>
#include <QStringList>
#include <QUrl>
#include "song.h"
class QTimer;
class Player;
class CollectionBackendInterface;
class PlaylistParser;
class ParserBase;
class CueParser;
#if defined(HAVE_AUDIOCD) && defined(HAVE_GSTREAMER)
class CddaSongLoader;
#endif
class SongLoader : public QObject {
Q_OBJECT
public:
explicit SongLoader(CollectionBackendInterface *collection, const Player *player, QObject *parent = nullptr);
~SongLoader() override;
enum Result {
Success,
Error,
BlockingLoadRequired,
};
static const int kDefaultTimeout;
const QUrl &url() const { return url_; }
const SongList &songs() const { return songs_; }
int timeout() const { return timeout_; }
void set_timeout(int msec) { timeout_ = msec; }
// If Success is returned the songs are fully loaded. If BlockingLoadRequired is returned LoadFilenamesBlocking() needs to be called next.
Result Load(const QUrl &url);
// Loads the files with only filenames. When finished, songs() contains a complete list of all Song objects, but without metadata.
// This method is blocking, do not call it from the UI thread.
SongLoader::Result LoadFilenamesBlocking();
// Completely load songs previously loaded with LoadFilenamesBlocking().
// When finished, the Song objects in songs() contain metadata now. This method is blocking, do not call it from the UI thread.
void LoadMetadataBlocking();
Result LoadAudioCD();
QStringList errors() { return errors_; }
signals:
void AudioCDTracksLoadFinished();
void LoadAudioCDFinished(bool success);
void LoadRemoteFinished();
private slots:
void Timeout();
void StopTypefind();
#if defined(HAVE_AUDIOCD) && defined(HAVE_GSTREAMER)
void AudioCDTracksLoadFinishedSlot(const SongList &songs, const QString &error);
void AudioCDTracksTagsLoaded(const SongList &songs);
#endif // HAVE_AUDIOCD && HAVE_GSTREAMER
private:
enum State { WaitingForType, WaitingForMagic, WaitingForData, Finished };
Result LoadLocal(const QString &filename);
SongLoader::Result LoadLocalAsync(const QString &filename);
void EffectiveSongLoad(Song *song);
Result LoadLocalPartial(const QString &filename);
void LoadLocalDirectory(const QString &filename);
void LoadPlaylist(ParserBase *parser, const QString &filename);
void AddAsRawStream();
#ifdef HAVE_GSTREAMER
Result LoadRemote();
// GStreamer callbacks
static void TypeFound(GstElement *typefind, uint probability, GstCaps *caps, void *self);
static GstPadProbeReturn DataReady(GstPad*, GstPadProbeInfo *info, gpointer self);
static GstBusSyncReply BusCallbackSync(GstBus*, GstMessage*, gpointer);
static gboolean BusCallback(GstBus*, GstMessage*, gpointer);
void StopTypefindAsync(bool success);
void ErrorMessageReceived(GstMessage *msg);
void EndOfStreamReached();
void MagicReady();
bool IsPipelinePlaying();
#endif
private:
static QSet<QString> sRawUriSchemes;
QUrl url_;
SongList songs_;
QTimer *timeout_timer_;
PlaylistParser *playlist_parser_;
CueParser *cue_parser_;
// For async loads
std::function<Result()> preload_func_;
int timeout_;
State state_;
bool success_;
ParserBase *parser_;
QString mime_type_;
QByteArray buffer_;
CollectionBackendInterface *collection_;
const Player *player_;
#ifdef HAVE_GSTREAMER
std::shared_ptr<GstElement> pipeline_;
#endif
QThreadPool thread_pool_;
QStringList errors_;
};
#endif // SONGLOADER_H