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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_CHROMAPRINT_HXX
#define MPD_CHROMAPRINT_HXX
#include "util/ScopeExit.hxx"
#include <chromaprint.h>
#include <stdexcept>
#include <string>
namespace Chromaprint {
class Context {
ChromaprintContext *const ctx;
public:
Context() noexcept
:ctx(chromaprint_new(CHROMAPRINT_ALGORITHM_DEFAULT)) {}
~Context() noexcept {
chromaprint_free(ctx);
}
Context(const Context &) = delete;
Context &operator=(const Context &) = delete;
void Start(unsigned sample_rate, unsigned num_channels) {
if (chromaprint_start(ctx, sample_rate, num_channels) != 1)
throw std::runtime_error("chromaprint_start() failed");
}
void Feed(const int16_t *data, size_t size) {
if (chromaprint_feed(ctx, data, size) != 1)
throw std::runtime_error("chromaprint_feed() failed");
}
void Finish() {
if (chromaprint_finish(ctx) != 1)
throw std::runtime_error("chromaprint_finish() failed");
}
std::string GetFingerprint() const {
char *fingerprint;
if (chromaprint_get_fingerprint(ctx, &fingerprint) != 1)
throw std::runtime_error("chromaprint_get_fingerprint() failed");
AtScopeExit(fingerprint) { chromaprint_dealloc(fingerprint); };
return fingerprint;
}
};
} //namespace Chromaprint
#endif