/* This file is part of Clementine. Copyright 2014, David Sansome Clementine 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. Clementine 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 Clementine. If not, see . */ #include #include #include #include "core/logging.h" #include "core/timeconstants.h" #include "cddasongloader.h" CddaSongLoader::CddaSongLoader(const QUrl& url, QObject* parent) : QObject(parent), url_(url), cdda_(nullptr), cdio_(nullptr) { connect(this, SIGNAL(MusicBrainzDiscIdLoaded(const QString&)), SLOT(LoadAudioCDTags(const QString&))); } CddaSongLoader::~CddaSongLoader() { if (cdio_) cdio_destroy(cdio_); } QUrl CddaSongLoader::GetUrlFromTrack(int track_number) const { if (url_.isEmpty()) { return QUrl(QString("cdda://%1a").arg(track_number)); } else { return QUrl(QString("cdda://%1/%2").arg(url_.path()).arg(track_number)); } } void CddaSongLoader::LoadSongs() { QtConcurrent::run(this, &CddaSongLoader::LoadSongsFromCdda); } void CddaSongLoader::LoadSongsFromCdda() { QMutexLocker locker(&mutex_load_); cdio_ = cdio_open(url_.path().toLocal8Bit().constData(), DRIVER_DEVICE); if (cdio_ == nullptr) { return; } // Create gstreamer cdda element GError* error = nullptr; cdda_ = gst_element_make_from_uri(GST_URI_SRC, "cdda://", nullptr, &error); if (error) { qLog(Error) << error->code << error->message; } if (cdda_ == nullptr) { return; } if (!url_.isEmpty()) { g_object_set(cdda_, "device", g_strdup(url_.path().toLocal8Bit().constData()), nullptr); } if (g_object_class_find_property (G_OBJECT_GET_CLASS (cdda_), "paranoia-mode")) { g_object_set (cdda_, "paranoia-mode", 0, NULL); } // Change the element's state to ready and paused, to be able to query it if (gst_element_set_state(cdda_, GST_STATE_READY) == GST_STATE_CHANGE_FAILURE || gst_element_set_state(cdda_, GST_STATE_PAUSED) == GST_STATE_CHANGE_FAILURE) { gst_element_set_state(cdda_, GST_STATE_NULL); gst_object_unref(GST_OBJECT(cdda_)); return; } // Get number of tracks GstFormat fmt = gst_format_get_by_nick("track"); GstFormat out_fmt = fmt; gint64 num_tracks = 0; if (!gst_element_query_duration(cdda_, out_fmt, &num_tracks) || out_fmt != fmt) { qLog(Error) << "Error while querying cdda GstElement"; gst_object_unref(GST_OBJECT(cdda_)); return; } SongList songs; for (int track_number = 1; track_number <= num_tracks; track_number++) { // Init song Song song; song.set_id(track_number); song.set_valid(true); song.set_filetype(Song::Type_Cdda); song.set_url( GetUrlFromTrack(track_number)); song.set_title(QString("Track %1").arg(track_number)); song.set_track(track_number); songs << song; } emit SongsLoaded(songs); gst_tag_register_musicbrainz_tags(); GstElement* pipeline = gst_pipeline_new("pipeline"); GstElement* sink = gst_element_factory_make ("fakesink", NULL); gst_bin_add_many (GST_BIN (pipeline), cdda_, sink, NULL); gst_element_link (cdda_, sink); gst_element_set_state(pipeline, GST_STATE_READY); gst_element_set_state(pipeline, GST_STATE_PAUSED); // Get TOC and TAG messages GstMessage* msg = nullptr; GstMessage* msg_toc = nullptr; GstMessage* msg_tag = nullptr; while ((msg = gst_bus_timed_pop_filtered( GST_ELEMENT_BUS(pipeline), 2 * GST_SECOND, (GstMessageType)(GST_MESSAGE_TOC | GST_MESSAGE_TAG)))) { if (GST_MESSAGE_TYPE(msg) == GST_MESSAGE_TOC) { if (msg_toc) gst_message_unref(msg_toc); // Shouldn't happen, but just in case msg_toc = msg; } else if (GST_MESSAGE_TYPE(msg) == GST_MESSAGE_TAG) { if (msg_tag) gst_message_unref(msg_tag); msg_tag = msg; } } // Handle TOC message: get tracks duration if (msg_toc) { GstToc* toc; gst_message_parse_toc (msg_toc, &toc, nullptr); if (toc) { GList* entries = gst_toc_get_entries(toc); if (entries && songs.size() <= g_list_length (entries)) { int i = 0; for (GList* node = entries; node != nullptr; node = node->next) { GstTocEntry *entry = static_cast(node->data); quint64 duration = 0; gint64 start, stop; if (gst_toc_entry_get_start_stop_times (entry, &start, &stop)) duration = stop - start; songs[i++].set_length_nanosec(duration); } } } gst_message_unref(msg_toc); } emit SongsDurationLoaded(songs); // Handle TAG message: generate MusicBrainz DiscId if (msg_tag) { GstTagList* tags = nullptr; gst_message_parse_tag(msg_tag, &tags); char* string_mb = nullptr; if (gst_tag_list_get_string(tags, GST_TAG_CDDA_MUSICBRAINZ_DISCID, &string_mb)) { QString musicbrainz_discid(string_mb); qLog(Info) << "MusicBrainz discid: " << musicbrainz_discid; emit MusicBrainzDiscIdLoaded(musicbrainz_discid); g_free(string_mb); gst_message_unref(msg_tag); gst_tag_list_free(tags); } } gst_element_set_state(pipeline, GST_STATE_NULL); // This will also cause cdda_ to be unref'd. gst_object_unref(pipeline); } void CddaSongLoader::LoadAudioCDTags(const QString& musicbrainz_discid) const { MusicBrainzClient* musicbrainz_client = new MusicBrainzClient; connect(musicbrainz_client, SIGNAL(Finished(const QString&, const QString&, MusicBrainzClient::ResultList)), SLOT(AudioCDTagsLoaded(const QString&, const QString&, MusicBrainzClient::ResultList))); musicbrainz_client->StartDiscIdRequest(musicbrainz_discid); } void CddaSongLoader::AudioCDTagsLoaded( const QString& artist, const QString& album, const MusicBrainzClient::ResultList& results) { MusicBrainzClient* musicbrainz_client = qobject_cast(sender()); musicbrainz_client->deleteLater(); SongList songs; if (results.size() == 0) return; int track_number = 1; for (const MusicBrainzClient::Result& ret : results) { Song song; song.set_artist(artist); song.set_album(album); song.set_title(ret.title_); song.set_length_nanosec(ret.duration_msec_ * kNsecPerMsec); song.set_track(track_number); song.set_year(ret.year_); song.set_id(track_number); song.set_filetype(Song::Type_Cdda); song.set_valid(true); // We need to set url: that's how playlist will find the correct item to // update song.set_url(GetUrlFromTrack(track_number++)); songs << song; } emit SongsMetadataLoaded(songs); } bool CddaSongLoader::HasChanged() { if ((cdio_ && cdda_) && cdio_get_media_changed(cdio_) != 1) { return false; } // Check if mutex is already token (i.e. init is already taking place) if (!mutex_load_.tryLock()) { return false; } mutex_load_.unlock(); return true; }