65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/*
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* Strawberry Music Player
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* This file was part of Clementine.
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* Copyright 2012, David Sansome <me@davidsansome.com>
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* Copyright 2019-2021, Jonas Kvinge <jonas@jkvinge.net>
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*
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* Strawberry is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Strawberry is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef CHROMAPRINTER_H
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#define CHROMAPRINTER_H
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#include "config.h"
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#include <glib.h>
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#include <gst/gst.h>
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#include <gst/app/gstappsink.h>
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#include <QBuffer>
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#include <QString>
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class Chromaprinter {
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// Creates a Chromaprint fingerprint from a song.
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// Uses GStreamer to open and decode the file as PCM data and passes this to Chromaprint's code generator.
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// The generated code can be used to identify a song via Acoustid.
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// You should create one Chromaprinter for each file you want to fingerprint.
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// This class works well with QtConcurrentMap.
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public:
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explicit Chromaprinter(const QString &filename);
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// Creates a fingerprint from the song.
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// This method is blocking, so you want to call it in another thread.
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// Returns an empty string if no fingerprint could be created.
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QString CreateFingerprint();
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private:
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GstElement *CreateElement(const QString &factory_name, GstElement *bin = nullptr);
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static void NewPadCallback(GstElement*, GstPad *pad, gpointer data);
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static GstFlowReturn NewBufferCallback(GstAppSink *app_sink, gpointer self);
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private:
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QString filename_;
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GstElement *convert_element_;
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QBuffer buffer_;
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};
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#endif // CHROMAPRINTER_H
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