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