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/*
* Copyright 2018-2019 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CHROMAPRINT_HXX
#define 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
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