112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Clementine is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cddadevice.h"
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#include <QUrl>
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#include "library/librarybackend.h"
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#include "library/librarymodel.h"
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const int kDiscChangePollingIntervalMs = 500;
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CddaDevice::CddaDevice(const QUrl& url, DeviceLister* lister,
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const QString& unique_id, DeviceManager* manager,
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Application* app, int database_id, bool first_time)
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: ConnectedDevice(url, lister, unique_id, manager, app, database_id,
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first_time),
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cdio_(nullptr),
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disc_changed_timer_(),
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cdda_song_loader_(url) {
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connect(&cdda_song_loader_, SIGNAL(SongsUpdated(SongList)), this,
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SLOT(SongsLoaded(SongList)));
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connect(&cdda_song_loader_, SIGNAL(Finished()), this,
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SLOT(SongsLoadingFinished()));
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connect(this, SIGNAL(SongsDiscovered(SongList)), model_,
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SLOT(SongsDiscovered(SongList)));
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connect(&disc_changed_timer_, SIGNAL(timeout()), SLOT(CheckDiscChanged()));
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}
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CddaDevice::~CddaDevice() {
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if (cdio_) {
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cdio_destroy(cdio_);
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cdio_ = nullptr;
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}
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}
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bool CddaDevice::Init() {
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if (!cdio_) {
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cdio_ = cdio_open(url_.path().toLocal8Bit().constData(), DRIVER_DEVICE);
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if (!cdio_) return false;
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LoadSongs();
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WatchForDiscChanges(true);
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}
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return true;
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}
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CddaSongLoader* CddaDevice::loader() { return &cdda_song_loader_; }
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bool CddaDevice::IsValid() const { return (cdio_ != nullptr); }
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void CddaDevice::WatchForDiscChanges(bool watch) {
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if (watch && !disc_changed_timer_.isActive())
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disc_changed_timer_.start(kDiscChangePollingIntervalMs);
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else if (!watch && disc_changed_timer_.isActive())
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disc_changed_timer_.stop();
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}
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void CddaDevice::LoadSongs() {
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cdda_song_loader_.LoadSongs();
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disc_changed_timer_.stop();
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}
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void CddaDevice::SongsLoaded(const SongList& songs) {
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model_->Reset();
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song_count_ = songs.size();
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emit SongsDiscovered(songs);
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// When a disc is inserted, cdio_get_media_changed will
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// return true for two times with a bit of delay in between
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// (at least on linux).
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// We clear cdio_get_media_changed after songs are
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// loaded, so we don't potentially re-read the same disc.terminal
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// There's a slight chance that this hides an actual
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// media change, but this should be rare enough to not
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// be a problem in practice and is easily rectified
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// by user cycling the disc once more.
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cdio_get_media_changed(cdio_);
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}
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void CddaDevice::SongsLoadingFinished() { disc_changed_timer_.start(); }
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void CddaDevice::CheckDiscChanged() {
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if (!cdio_) return; // do nothing if not initialized
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// do nothing if loader is currently reading;
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// we'd just block until it's finished
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if (cdda_song_loader_.IsActive()) return;
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if (cdio_get_media_changed(cdio_) == 1) {
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emit DiscChanged();
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song_count_ = 0;
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SongList no_songs;
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SongsLoaded(no_songs);
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LoadSongs();
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}
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}
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SongList CddaDevice::songs() const { return cdda_song_loader_.cached_tracks(); }
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