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strawberry-audio-player-win.../src/device/cddasongloader.cpp

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/*
* 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/>.
*
*/
#include "config.h"
#include <memory>
#include <cstddef>
#include <glib.h>
#include <glib/gtypes.h>
#include <glib-object.h>
#include <QtGlobal>
#include <QObject>
#include <QMutex>
#include <QByteArray>
#include <QString>
#include <QUrl>
#include <cdio/cdio.h>
#include <gst/gst.h>
#include <gst/tag/tag.h>
#include "cddasongloader.h"
#include "core/logging.h"
#include "core/shared_ptr.h"
#include "core/networkaccessmanager.h"
#include "utilities/timeconstants.h"
using std::make_shared;
CddaSongLoader::CddaSongLoader(const QUrl &url, QObject *parent)
: QObject(parent),
url_(url),
network_(make_shared<NetworkAccessManager>()),
cdda_(nullptr),
cdio_(nullptr) {}
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() {
QMutexLocker locker(&mutex_load_);
cdio_ = cdio_open(url_.path().toLocal8Bit().constData(), DRIVER_DEVICE);
if (cdio_ == nullptr) {
Error("Unable to open CDIO device.");
return;
}
// Create gstreamer cdda element
GError *error = nullptr;
cdda_ = gst_element_make_from_uri(GST_URI_SRC, "cdda://", nullptr, &error);
if (error) {
Error(QString("%1: %2").arg(error->code).arg(error->message));
}
if (!cdda_) 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, nullptr);
}
// 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_NULL);
gst_object_unref(GST_OBJECT(cdda_));
cdda_ = nullptr;
Error(tr("Error while setting CDDA device to ready state."));
return;
}
if (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_));
cdda_ = nullptr;
Error(tr("Error while setting CDDA device to pause state."));
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)) {
gst_element_set_state(cdda_, GST_STATE_NULL);
gst_object_unref(GST_OBJECT(cdda_));
cdda_ = nullptr;
Error(tr("Error while querying CDDA tracks."));
return;
}
if (out_fmt != fmt) {
qLog(Error) << "Error while querying cdda GstElement (2).";
gst_element_set_state(cdda_, GST_STATE_NULL);
gst_object_unref(GST_OBJECT(cdda_));
cdda_ = nullptr;
Error(tr("Error while querying CDDA tracks."));
return;
}
SongList songs;
songs.reserve(num_tracks);
for (int track_number = 1; track_number <= num_tracks; ++track_number) {
// Init song
Song song(Song::Source::CDDA);
song.set_id(track_number);
song.set_valid(true);
song.set_filetype(Song::FileType::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", nullptr);
gst_bin_add_many(GST_BIN(pipeline), cdda_, sink, nullptr);
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), GST_SECOND, static_cast<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 = nullptr;
gst_message_parse_toc(msg_toc, &toc, nullptr);
if (toc) {
GList *entries = gst_toc_get_entries(toc);
if (entries && static_cast<guint>(songs.size()) <= g_list_length(entries)) {
int i = 0;
for (GList *node = entries; node != nullptr; node = node->next) {
GstTocEntry *entry = static_cast<GstTocEntry*>(node->data);
qint64 duration = 0;
gint64 start = 0, stop = 0;
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);
#ifdef HAVE_MUSICBRAINZ
// 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;
MusicBrainzClient *musicbrainz_client = new MusicBrainzClient(network_);
QObject::connect(musicbrainz_client, &MusicBrainzClient::DiscIdFinished, this, &CddaSongLoader::AudioCDTagsLoaded);
musicbrainz_client->StartDiscIdRequest(musicbrainz_discid);
g_free(string_mb);
gst_message_unref(msg_tag);
gst_tag_list_unref(tags);
}
}
#endif
gst_element_set_state(pipeline, GST_STATE_NULL);
// This will also cause cdda_ to be unref'd.
gst_object_unref(pipeline);
}
#ifdef HAVE_MUSICBRAINZ
void CddaSongLoader::AudioCDTagsLoaded(const QString &artist, const QString &album, const MusicBrainzClient::ResultList &results) {
MusicBrainzClient *musicbrainz_client = qobject_cast<MusicBrainzClient*>(sender());
musicbrainz_client->deleteLater();
if (results.empty()) return;
SongList songs;
songs.reserve(results.count());
int track_number = 1;
for (const MusicBrainzClient::Result &ret : results) {
Song song(Song::Source::CDDA);
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::FileType::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);
}
#endif
bool CddaSongLoader::HasChanged() {
if (cdio_ && 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;
}
void CddaSongLoader::Error(const QString &error) {
qLog(Error) << error;
emit SongsDurationLoaded(SongList(), error);
}
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