/**
* Reads audio file record from database and generates audio preview.
*/
public function preview()
{
Logger::printf("Requested preview for track %s", $this->track_id);
if ($this->hasPreview()) {
Logger::printf("Track preview is available (file_id is %s)", $this->track_data[TSongs::PREVIEW_ID]);
FileServer::sendToClient($this->track_data[TSongs::PREVIEW_ID]);
return;
}
Logger::printf("Track preview is unavailable");
Logger::printf("Generating new track preview in real time");
header("Content-Type: " . PREVIEW_MIME);
$temp_file = TempFileProvider::generate("preview", ".mp3");
$filename = FileServer::getFileUsingId($this->track_data[TSongs::FILE_ID]);
$command_template = "%s -i %s -bufsize 256k -vn -ab 128k -ac 2 -acodec libmp3lame -f mp3 - | tee %s";
$command = sprintf($command_template, $this->settings->get("tools", "ffmpeg_cmd"), escapeshellarg($filename), escapeshellarg($temp_file));
passthru($command);
$temp_file_id = FileServer::register($temp_file, PREVIEW_MIME);
Logger::printf("New preview registered => %s", $temp_file_id);
SongDao::updateSongUsingId($this->track_id, [TSongs::PREVIEW_ID => $temp_file_id]);
}
public static function changeCover($song_id, $cover_file)
{
$song_ids = explode(",", $song_id);
$song_objects = (new SelectQuery(TSongs::_NAME))->where(TSongs::ID, $song_ids)->where(TSongs::USER_ID, self::$me->getId())->fetchAll();
// Delete exists covers
foreach ($song_objects as $song) {
if ($song[TSongs::C_SMALL_ID]) {
FileServer::unregister($song[TSongs::C_SMALL_ID]);
}
if ($song[TSongs::C_MID_ID]) {
FileServer::unregister($song[TSongs::C_MID_ID]);
}
if ($song[TSongs::C_BIG_ID]) {
FileServer::unregister($song[TSongs::C_BIG_ID]);
}
}
$covers = FFProbe::readTempCovers($cover_file)->getOrThrow(ControllerException::class, "Image file is corrupted");
$query = (new UpdateQuery(TSongs::_NAME))->where(TSongs::ID, $song_ids)->where(TSongs::USER_ID, self::$me->getId());
$full_cover_id = FileServer::register($covers[0]);
$middle_cover_id = FileServer::register($covers[1]);
$small_cover_id = FileServer::register($covers[2]);
$query->set(TSongs::C_SMALL_ID, $small_cover_id)->set(TSongs::C_MID_ID, $middle_cover_id)->set(TSongs::C_BIG_ID, $full_cover_id);
$query->returning(implode(",", [TSongs::ID, TSongs::C_SMALL_ID, TSongs::C_MID_ID, TSongs::C_BIG_ID]));
return $query->fetchAll();
}
