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/*
* Copyright (C) 2008 Zeeshan Ali <zeenix@gmail.com>.
*
* Author: Zeeshan Ali <zeenix@gmail.com>
*
* This file is part of Rygel.
*
* Rygel is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Rygel 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
using Gst;
internal errordomain ThumbnailerError {
NO_DIR,
NO_THUMBNAIL
}
/**
* Provides thumbnails for images and vidoes.
*/
internal class Rygel.Thumbnailer : GLib.Object {
private static Thumbnailer thumbnailer; // Our singleton object
private static bool first_time = true;
private Thumbnail template;
private string extension;
private DbusThumbnailer thumbler = null;
private Thumbnailer () throws ThumbnailerError {
this.template = new Thumbnail ("image/png", "PNG_TN", "png");
this.template.width = 128;
this.template.height = 128;
this.template.depth = 32;
this.extension = "." + this.template.file_extension;
try {
this.thumbler = new DbusThumbnailer ();
this.thumbler.ready.connect (this.on_dbus_thumbnailer_ready);
} catch (Error error) {}
}
public static Thumbnailer? get_default () {
if (first_time) {
try {
thumbnailer = new Thumbnailer ();
} catch (ThumbnailerError err) {
warning (_("No thumbnailer available: %s"), err.message);
}
first_time = false;
}
return thumbnailer;
}
public Thumbnail get_thumbnail (string uri, string mime_type) throws Error {
var file = File.new_for_uri (uri);
var info = file.query_info (FileAttribute.THUMBNAIL_PATH + "," +
FileAttribute.THUMBNAILING_FAILED,
FileQueryInfoFlags.NONE);
var path = info.get_attribute_as_string (FileAttribute.THUMBNAIL_PATH);
var failed = info.get_attribute_boolean
(FileAttribute.THUMBNAILING_FAILED);
if (failed) {
// Thumbnailing failed previously, so there's no current thumbnail
// and it doesn't make any sense to request one.
throw new ThumbnailerError.NO_THUMBNAIL
(_("No thumbnail available"));
}
// Send a request to create thumbnail if it does not exist, signalize
// that there's no thumbnail available now.
if (this.thumbler != null && path == null) {
this.thumbler.queue_thumbnail_task (uri, mime_type);
throw new ThumbnailerError.NO_THUMBNAIL
(_("No thumbnail available"));
}
file = File.new_for_path (path);
info = file.query_info (FileAttribute.ACCESS_CAN_READ + "," +
FileAttribute.STANDARD_SIZE,
FileQueryInfoFlags.NONE,
null);
if (!info.get_attribute_boolean (FileAttribute.ACCESS_CAN_READ)) {
throw new ThumbnailerError.NO_THUMBNAIL
(_("No thumbnail available"));
}
var thumbnail = new Thumbnail (this.template.mime_type,
this.template.dlna_profile,
this.template.file_extension);
thumbnail.width = this.template.width;
thumbnail.height = this.template.height;
thumbnail.depth = this.template.depth;
thumbnail.uri = Filename.to_uri (path, null);
thumbnail.size = (int64) info.get_attribute_uint64
(FileAttribute.STANDARD_SIZE);
return thumbnail;
}
private void on_dbus_thumbnailer_ready (bool available) {
if (!available) {
this.thumbler = null;
message (_("No D-Bus thumbnailer available"));
}
}
}
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