strawberry-audio-player-win.../src/scrobbler/listenbrainzscrobbler.cpp

745 lines
23 KiB
C++

/*
* Strawberry Music Player
* Copyright 2018-2023, 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 <algorithm>
#include <QCoreApplication>
#include <QtGlobal>
#include <QDesktopServices>
#include <QVariant>
#include <QByteArray>
#include <QString>
#include <QUrl>
#include <QUrlQuery>
#include <QDateTime>
#include <QTimer>
#include <QMessageBox>
#include <QSettings>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#include "core/application.h"
#include "core/networkaccessmanager.h"
#include "core/song.h"
#include "core/logging.h"
#include "utilities/timeconstants.h"
#include "internet/localredirectserver.h"
#include "settings/scrobblersettingspage.h"
#include "audioscrobbler.h"
#include "scrobblerservice.h"
#include "scrobblercache.h"
#include "scrobblercacheitem.h"
#include "scrobblemetadata.h"
#include "listenbrainzscrobbler.h"
const char *ListenBrainzScrobbler::kName = "ListenBrainz";
const char *ListenBrainzScrobbler::kSettingsGroup = "ListenBrainz";
const char *ListenBrainzScrobbler::kOAuthAuthorizeUrl = "https://musicbrainz.org/oauth2/authorize";
const char *ListenBrainzScrobbler::kOAuthAccessTokenUrl = "https://musicbrainz.org/oauth2/token";
const char *ListenBrainzScrobbler::kOAuthRedirectUrl = "http://localhost";
const char *ListenBrainzScrobbler::kApiUrl = "https://api.listenbrainz.org";
const char *ListenBrainzScrobbler::kClientIDB64 = "b2VBVU53cVNRZXIwZXIwOUZpcWkwUQ==";
const char *ListenBrainzScrobbler::kClientSecretB64 = "Uk9GZ2hrZVEzRjNvUHlFaHFpeVdQQQ==";
const char *ListenBrainzScrobbler::kCacheFile = "listenbrainzscrobbler.cache";
const int ListenBrainzScrobbler::kScrobblesPerRequest = 10;
ListenBrainzScrobbler::ListenBrainzScrobbler(Application *app, QObject *parent)
: ScrobblerService(kName, app, parent),
app_(app),
network_(new NetworkAccessManager(this)),
cache_(new ScrobblerCache(kCacheFile, this)),
server_(nullptr),
enabled_(false),
expires_in_(-1),
login_time_(0),
submitted_(false),
scrobbled_(false),
timestamp_(0),
submit_error_(false),
prefer_albumartist_(false) {
refresh_login_timer_.setSingleShot(true);
QObject::connect(&refresh_login_timer_, &QTimer::timeout, this, &ListenBrainzScrobbler::RequestNewAccessToken);
timer_submit_.setSingleShot(true);
QObject::connect(&timer_submit_, &QTimer::timeout, this, &ListenBrainzScrobbler::Submit);
ListenBrainzScrobbler::ReloadSettings();
LoadSession();
}
ListenBrainzScrobbler::~ListenBrainzScrobbler() {
while (!replies_.isEmpty()) {
QNetworkReply *reply = replies_.takeFirst();
QObject::disconnect(reply, nullptr, this, nullptr);
reply->abort();
reply->deleteLater();
}
if (server_) {
QObject::disconnect(server_, nullptr, this, nullptr);
if (server_->isListening()) server_->close();
server_->deleteLater();
}
}
void ListenBrainzScrobbler::ReloadSettings() {
QSettings s;
s.beginGroup(kSettingsGroup);
enabled_ = s.value("enabled", false).toBool();
user_token_ = s.value("user_token").toString();
s.endGroup();
s.beginGroup(ScrobblerSettingsPage::kSettingsGroup);
prefer_albumartist_ = s.value("albumartist", false).toBool();
s.endGroup();
}
void ListenBrainzScrobbler::LoadSession() {
QSettings s;
s.beginGroup(kSettingsGroup);
access_token_ = s.value("access_token").toString();
expires_in_ = s.value("expires_in", -1).toInt();
token_type_ = s.value("token_type").toString();
refresh_token_ = s.value("refresh_token").toString();
login_time_ = s.value("login_time").toLongLong();
s.endGroup();
if (!refresh_token_.isEmpty()) {
qint64 time = expires_in_ - (QDateTime::currentDateTime().toSecsSinceEpoch() - static_cast<qint64>(login_time_));
if (time < 6) time = 6;
refresh_login_timer_.setInterval(static_cast<int>(time * kMsecPerSec));
refresh_login_timer_.start();
}
}
void ListenBrainzScrobbler::Logout() {
access_token_.clear();
token_type_.clear();
refresh_token_.clear();
expires_in_ = -1;
login_time_ = 0;
QSettings settings;
settings.beginGroup(kSettingsGroup);
settings.remove("access_token");
settings.remove("expires_in");
settings.remove("token_type");
settings.remove("refresh_token");
settings.endGroup();
}
void ListenBrainzScrobbler::Authenticate(const bool https) {
if (!server_) {
server_ = new LocalRedirectServer(this);
server_->set_https(https);
if (!server_->Listen()) {
AuthError(server_->error());
delete server_;
server_ = nullptr;
return;
}
QObject::connect(server_, &LocalRedirectServer::Finished, this, &ListenBrainzScrobbler::RedirectArrived);
}
QUrl redirect_url(kOAuthRedirectUrl);
redirect_url.setPort(server_->url().port());
QUrlQuery url_query;
url_query.addQueryItem("response_type", "code");
url_query.addQueryItem("client_id", QByteArray::fromBase64(kClientIDB64));
url_query.addQueryItem("redirect_uri", redirect_url.toString());
url_query.addQueryItem("scope", "profile;email;tag;rating;collection;submit_isrc;submit_barcode");
QUrl url(kOAuthAuthorizeUrl);
url.setQuery(url_query);
bool result = QDesktopServices::openUrl(url);
if (!result) {
QMessageBox messagebox(QMessageBox::Information, tr("ListenBrainz Authentication"), tr("Please open this URL in your browser") + QString(":<br /><a href=\"%1\">%1</a>").arg(url.toString()), QMessageBox::Ok);
messagebox.setTextFormat(Qt::RichText);
messagebox.exec();
}
}
void ListenBrainzScrobbler::RedirectArrived() {
if (!server_) return;
if (server_->error().isEmpty()) {
QUrl url = server_->request_url();
if (url.isValid()) {
QUrlQuery url_query(url);
if (url_query.hasQueryItem("error")) {
AuthError(QUrlQuery(url).queryItemValue("error"));
}
else if (url_query.hasQueryItem("code")) {
RequestAccessToken(url, url_query.queryItemValue("code"));
}
else {
AuthError(tr("Redirect missing token code!"));
}
}
else {
AuthError(tr("Received invalid reply from web browser."));
}
}
else {
AuthError(server_->error());
}
server_->close();
server_->deleteLater();
server_ = nullptr;
}
void ListenBrainzScrobbler::RequestAccessToken(const QUrl &redirect_url, const QString &code) {
refresh_login_timer_.stop();
ParamList params = ParamList() << Param("client_id", QByteArray::fromBase64(kClientIDB64))
<< Param("client_secret", QByteArray::fromBase64(kClientSecretB64));
if (!code.isEmpty() && !redirect_url.isEmpty()) {
params << Param("grant_type", "authorization_code");
params << Param("code", code);
params << Param("redirect_uri", redirect_url.toString());
}
else if (!refresh_token_.isEmpty() && enabled_) {
params << Param("grant_type", "refresh_token");
params << Param("refresh_token", refresh_token_);
}
else {
return;
}
QUrlQuery url_query;
for (const Param &param : params) {
url_query.addQueryItem(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
}
QUrl session_url(kOAuthAccessTokenUrl);
QNetworkRequest req(session_url);
req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
QByteArray query = url_query.toString(QUrl::FullyEncoded).toUtf8();
QNetworkReply *reply = network_->post(req, query);
replies_ << reply;
QObject::connect(reply, &QNetworkReply::finished, this, [this, reply]() { AuthenticateReplyFinished(reply); });
}
void ListenBrainzScrobbler::AuthenticateReplyFinished(QNetworkReply *reply) {
if (!replies_.contains(reply)) return;
replies_.removeAll(reply);
QObject::disconnect(reply, nullptr, this, nullptr);
reply->deleteLater();
QByteArray data;
if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200) {
data = reply->readAll();
}
else {
if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
// This is a network error, there is nothing more to do.
AuthError(QString("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
}
else {
// See if there is Json data containing "error" and "error_description" - then use that instead.
data = reply->readAll();
QString error;
QJsonParseError json_error;
QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
if (json_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
QJsonObject json_obj = json_doc.object();
if (json_obj.contains("error") && json_obj.contains("error_description")) {
error = json_obj["error_description"].toString();
}
}
if (error.isEmpty()) {
if (reply->error() != QNetworkReply::NoError) {
error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
}
else {
error = QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
}
}
AuthError(error);
}
return;
}
QJsonObject json_obj = ExtractJsonObj(data);
if (json_obj.isEmpty()) {
AuthError("Json document from server was empty.");
return;
}
if (json_obj.contains("error") && json_obj.contains("error_description")) {
QString failure_reason = json_obj["error_description"].toString();
AuthError(failure_reason);
return;
}
if (!json_obj.contains("access_token") || !json_obj.contains("expires_in") || !json_obj.contains("token_type")) {
AuthError("Json access_token, expires_in or token_type is missing.");
return;
}
access_token_ = json_obj["access_token"].toString();
expires_in_ = json_obj["expires_in"].toInt();
token_type_ = json_obj["token_type"].toString();
if (json_obj.contains("refresh_token")) {
refresh_token_ = json_obj["refresh_token"].toString();
}
login_time_ = QDateTime::currentDateTime().toSecsSinceEpoch();
QSettings s;
s.beginGroup(kSettingsGroup);
s.setValue("access_token", access_token_);
s.setValue("expires_in", expires_in_);
s.setValue("token_type", token_type_);
s.setValue("refresh_token", refresh_token_);
s.setValue("login_time", login_time_);
s.endGroup();
if (expires_in_ > 0) {
refresh_login_timer_.setInterval(static_cast<int>(expires_in_ * kMsecPerSec));
refresh_login_timer_.start();
}
emit AuthenticationComplete(true);
qLog(Debug) << "ListenBrainz: Authentication was successful, login expires in" << expires_in_;
StartSubmit();
}
QNetworkReply *ListenBrainzScrobbler::CreateRequest(const QUrl &url, const QJsonDocument &json_doc) {
QNetworkRequest req(url);
req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
req.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
req.setRawHeader("Authorization", QString("Token %1").arg(user_token_).toUtf8());
QNetworkReply *reply = network_->post(req, json_doc.toJson());
replies_ << reply;
//qLog(Debug) << "ListenBrainz: Sending request" << json_doc.toJson();
return reply;
}
QByteArray ListenBrainzScrobbler::GetReplyData(QNetworkReply *reply) {
QByteArray data;
if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200) {
data = reply->readAll();
}
else {
if (reply->error() < 200) {
// This is a network error, there is nothing more to do.
Error(QString("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
}
else {
// See if there is Json data containing "code" and "error" - then use that instead.
data = reply->readAll();
QString error;
QJsonParseError json_error;
QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
if (json_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
QJsonObject json_obj = json_doc.object();
if (json_obj.contains("code") && json_obj.contains("error")) {
int error_code = json_obj["code"].toInt();
QString error_message = json_obj["error"].toString();
error = QString("%1 (%2)").arg(error_message).arg(error_code);
}
else {
error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
}
}
if (error.isEmpty()) {
if (reply->error() != QNetworkReply::NoError) {
error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
}
else {
error = QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
}
}
if (reply->error() == QNetworkReply::ContentAccessDenied || reply->error() == QNetworkReply::ContentOperationNotPermittedError || reply->error() == QNetworkReply::AuthenticationRequiredError) {
// Session is probably expired
Logout();
}
Error(error);
}
return QByteArray();
}
return data;
}
QJsonObject ListenBrainzScrobbler::JsonTrackMetadata(const ScrobbleMetadata &metadata) const {
QJsonObject object_track_metadata;
if (prefer_albumartist_) {
object_track_metadata.insert("artist_name", QJsonValue::fromVariant(metadata.effective_albumartist()));
}
else {
object_track_metadata.insert("artist_name", QJsonValue::fromVariant(metadata.artist));
}
if (!metadata.album.isEmpty()) {
object_track_metadata.insert("release_name", QJsonValue::fromVariant(StripAlbum(metadata.album)));
}
object_track_metadata.insert("track_name", QJsonValue::fromVariant(StripTitle(metadata.title)));
QJsonObject object_additional_info;
object_additional_info.insert("duration_ms", metadata.length_nanosec / kNsecPerMsec);
if (metadata.track > 0) {
object_additional_info.insert("tracknumber", metadata.track);
}
object_additional_info.insert("media_player", QCoreApplication::applicationName());
object_additional_info.insert("media_player_version", QCoreApplication::applicationVersion());
object_additional_info.insert("submission_client", QCoreApplication::applicationName());
object_additional_info.insert("submission_client_version", QCoreApplication::applicationVersion());
QJsonArray artist_mbids;
if (!metadata.musicbrainz_album_artist_id.isEmpty()) {
artist_mbids.append(metadata.musicbrainz_album_artist_id);
}
if (!metadata.musicbrainz_artist_id.isEmpty() && !artist_mbids.contains(metadata.musicbrainz_artist_id)) {
artist_mbids.append(metadata.musicbrainz_artist_id);
}
if (!metadata.musicbrainz_original_artist_id.isEmpty() && !artist_mbids.contains(metadata.musicbrainz_original_artist_id)) {
artist_mbids.append(metadata.musicbrainz_original_artist_id);
}
if (!artist_mbids.isEmpty()) {
object_additional_info.insert("artist_mbids", artist_mbids);
}
if (!metadata.musicbrainz_album_id.isEmpty()) {
object_additional_info.insert("release_mbid", metadata.musicbrainz_album_id);
}
else if (!metadata.musicbrainz_original_album_id.isEmpty()) {
object_additional_info.insert("release_mbid", metadata.musicbrainz_original_album_id);
}
if (!metadata.musicbrainz_recording_id.isEmpty()) {
object_additional_info.insert("recording_mbid", metadata.musicbrainz_recording_id);
}
if (!metadata.musicbrainz_track_id.isEmpty()) {
object_additional_info.insert("track_mbid", metadata.musicbrainz_track_id);
}
if (!metadata.musicbrainz_work_id.isEmpty()) {
object_additional_info.insert("work_mbids", QJsonArray() << metadata.musicbrainz_work_id);
}
object_track_metadata.insert("additional_info", object_additional_info);
return object_track_metadata;
}
void ListenBrainzScrobbler::UpdateNowPlaying(const Song &song) {
CheckScrobblePrevSong();
song_playing_ = song;
scrobbled_ = false;
timestamp_ = QDateTime::currentDateTime().toSecsSinceEpoch();
if (!song.is_metadata_good() || !IsAuthenticated() || app_->scrobbler()->IsOffline()) return;
QJsonObject object_listen;
object_listen.insert("track_metadata", JsonTrackMetadata(ScrobbleMetadata(song)));
QJsonArray array_payload;
array_payload.append(object_listen);
QJsonObject object;
object.insert("listen_type", "playing_now");
object.insert("payload", array_payload);
QJsonDocument doc(object);
QUrl url(QString("%1/1/submit-listens").arg(kApiUrl));
QNetworkReply *reply = CreateRequest(url, doc);
QObject::connect(reply, &QNetworkReply::finished, this, [this, reply]() { UpdateNowPlayingRequestFinished(reply); });
}
void ListenBrainzScrobbler::UpdateNowPlayingRequestFinished(QNetworkReply *reply) {
if (!replies_.contains(reply)) return;
replies_.removeAll(reply);
QObject::disconnect(reply, nullptr, this, nullptr);
reply->deleteLater();
QByteArray data = GetReplyData(reply);
if (data.isEmpty()) {
return;
}
QJsonObject json_obj = ExtractJsonObj(data);
if (json_obj.isEmpty()) {
return;
}
if (json_obj.contains("code") && json_obj.contains("error_description")) {
QString error_desc = json_obj["error_description"].toString();
Error(error_desc);
return;
}
if (!json_obj.contains("status")) {
Error("Missing status from server.", json_obj);
return;
}
QString status = json_obj["status"].toString();
if (status.compare("ok", Qt::CaseInsensitive) != 0) {
Error(status);
}
}
void ListenBrainzScrobbler::ClearPlaying() {
CheckScrobblePrevSong();
song_playing_ = Song();
scrobbled_ = false;
timestamp_ = 0;
}
void ListenBrainzScrobbler::Scrobble(const Song &song) {
if (song.id() != song_playing_.id() || song.url() != song_playing_.url() || !song.is_metadata_good()) return;
scrobbled_ = true;
cache_->Add(song, timestamp_);
if (app_->scrobbler()->IsOffline() || !IsAuthenticated()) return;
StartSubmit();
}
void ListenBrainzScrobbler::StartSubmit(const bool initial) {
if (!submitted_ && cache_->Count() > 0) {
if (initial && app_->scrobbler()->SubmitDelay() <= 0 && !submit_error_) {
if (timer_submit_.isActive()) {
timer_submit_.stop();
}
Submit();
}
else if (!timer_submit_.isActive()) {
int submit_delay = static_cast<int>(std::max(app_->scrobbler()->SubmitDelay(), submit_error_ ? 30 : 5) * kMsecPerSec);
timer_submit_.setInterval(submit_delay);
timer_submit_.start();
}
}
}
void ListenBrainzScrobbler::Submit() {
qLog(Debug) << "ListenBrainz: Submitting scrobbles.";
if (!IsEnabled() || !IsAuthenticated() || app_->scrobbler()->IsOffline()) return;
QJsonArray array;
int i = 0;
QList<quint64> list;
ScrobblerCacheItemPtrList cache_items = cache_->List();
for (ScrobblerCacheItemPtr cache_item : cache_items) {
if (cache_item->sent) continue;
cache_item->sent = true;
++i;
list << cache_item->timestamp;
QJsonObject object_listen;
object_listen.insert("listened_at", QJsonValue::fromVariant(cache_item->timestamp));
object_listen.insert("track_metadata", JsonTrackMetadata(cache_item->metadata));
array.append(QJsonValue::fromVariant(object_listen));
if (i >= kScrobblesPerRequest) break;
}
if (i <= 0) return;
submitted_ = true;
QJsonObject object;
object.insert("listen_type", "import");
object.insert("payload", array);
QJsonDocument doc(object);
QUrl url(QString("%1/1/submit-listens").arg(kApiUrl));
QNetworkReply *reply = CreateRequest(url, doc);
QObject::connect(reply, &QNetworkReply::finished, this, [this, reply, list]() { ScrobbleRequestFinished(reply, list); });
}
void ListenBrainzScrobbler::ScrobbleRequestFinished(QNetworkReply *reply, const QList<quint64> &list) {
if (!replies_.contains(reply)) return;
replies_.removeAll(reply);
QObject::disconnect(reply, nullptr, this, nullptr);
reply->deleteLater();
submitted_ = false;
QByteArray data = GetReplyData(reply);
if (data.isEmpty()) {
cache_->ClearSent(list);
submit_error_ = true;
StartSubmit();
return;
}
QJsonObject json_obj = ExtractJsonObj(data);
if (json_obj.isEmpty()) {
cache_->ClearSent(list);
submit_error_ = true;
StartSubmit();
return;
}
if (json_obj.contains("code") && json_obj.contains("error_description")) {
QString error_desc = json_obj["error_description"].toString();
Error(error_desc);
cache_->ClearSent(list);
submit_error_ = true;
StartSubmit();
return;
}
if (json_obj.contains("status")) {
QString status = json_obj["status"].toString();
qLog(Debug) << "ListenBrainz: Received scrobble status:" << status;
}
cache_->Flush(list);
submit_error_ = false;
StartSubmit();
}
void ListenBrainzScrobbler::Love() {
if (!song_playing_.is_valid() || !song_playing_.is_metadata_good()) return;
if (!IsAuthenticated()) app_->scrobbler()->ShowConfig();
if (song_playing_.musicbrainz_recording_id().isEmpty()) {
qLog(Error) << "ListenBrainz: Missing MusicBrainz recording ID for" << song_playing_.artist() << song_playing_.album() << song_playing_.title();
return;
}
qLog(Debug) << "ListenBrainz: Sending love for song" << song_playing_.artist() << song_playing_.album() << song_playing_.title();
QJsonObject object;
object.insert("recording_mbid", song_playing_.musicbrainz_recording_id());
object.insert("score", 1);
QUrl url(QString("%1/1/feedback/recording-feedback").arg(kApiUrl));
QNetworkReply *reply = CreateRequest(url, QJsonDocument(object));
QObject::connect(reply, &QNetworkReply::finished, this, [this, reply]() { LoveRequestFinished(reply); });
}
void ListenBrainzScrobbler::LoveRequestFinished(QNetworkReply *reply) {
if (!replies_.contains(reply)) return;
replies_.removeAll(reply);
QObject::disconnect(reply, nullptr, this, nullptr);
reply->deleteLater();
QByteArray data = GetReplyData(reply);
if (data.isEmpty()) {
return;
}
QJsonObject json_obj = ExtractJsonObj(data);
if (json_obj.isEmpty()) {
return;
}
if (json_obj.contains("code") && json_obj.contains("error_description")) {
Error(json_obj["error_description"].toString());
return;
}
if (json_obj.contains("status")) {
QString status = json_obj["status"].toString();
qLog(Debug) << "ListenBrainz: Received recording-feedback status:" << status;
}
}
void ListenBrainzScrobbler::AuthError(const QString &error) {
emit AuthenticationComplete(false, error);
}
void ListenBrainzScrobbler::Error(const QString &error, const QVariant &debug) {
qLog(Error) << "ListenBrainz:" << error;
if (debug.isValid()) qLog(Debug) << debug;
}
void ListenBrainzScrobbler::CheckScrobblePrevSong() {
qint64 duration = QDateTime::currentDateTime().toSecsSinceEpoch() - static_cast<qint64>(timestamp_);
if (duration < 0) duration = 0;
if (!scrobbled_ && song_playing_.is_metadata_good() && song_playing_.is_radio() && duration > 30) {
Song song(song_playing_);
song.set_length_nanosec(duration * kNsecPerSec);
Scrobble(song);
}
}