strawberry-audio-player-win.../src/musicbrainz/chromaprinter.h

65 lines
1.9 KiB
C
Raw Normal View History

2018-02-27 18:06:05 +01:00
/*
* Strawberry Music Player
* This file was part of Clementine.
* Copyright 2012, David Sansome <me@davidsansome.com>
*
* 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/>.
2018-08-09 18:39:44 +02:00
*
2018-02-27 18:06:05 +01:00
*/
#ifndef CHROMAPRINTER_H
#define CHROMAPRINTER_H
#include "config.h"
#include <glib.h>
2018-02-27 18:06:05 +01:00
#include <gst/gst.h>
#include <gst/app/gstappsink.h>
#include <QBuffer>
#include <QString>
class Chromaprinter {
// Creates a Chromaprint fingerprint from a song.
// Uses GStreamer to open and decode the file as PCM data and passes this to Chromaprint's code generator.
// The generated code can be used to identify a song via Acoustid.
2018-02-27 18:06:05 +01:00
// You should create one Chromaprinter for each file you want to fingerprint.
// This class works well with QtConcurrentMap.
public:
Chromaprinter(const QString &filename);
2018-02-27 18:06:05 +01:00
~Chromaprinter();
// Creates a fingerprint from the song.
// This method is blocking, so you want to call it in another thread.
// Returns an empty string if no fingerprint could be created.
2018-02-27 18:06:05 +01:00
QString CreateFingerprint();
private:
GstElement *CreateElement(const QString &factory_name, GstElement *bin = nullptr);
static void NewPadCallback(GstElement*, GstPad *pad, gpointer data);
static GstFlowReturn NewBufferCallback(GstAppSink *app_sink, gpointer self);
private:
QString filename_;
GstElement *convert_element_;
QBuffer buffer_;
};
#endif // CHROMAPRINTER_H