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/*
* Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2019 Robin Gareus <robin@gareus.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 _ardour_mp3file_importable_source_h_
#define _ardour_mp3file_importable_source_h_
#include <stdint.h>
#include "ardour/libardour_visibility.h"
#include "ardour/types.h"
#include "ardour/importable_source.h"
namespace ARDOUR {
/* 64bit CPUs always have SSE2, armhf/aarch64 has NEON,
* except apple/OSX does not provide immintrin.h
*/
#if defined ( __i386__) || defined (__PPC__) || defined (__APPLE__)
#define MINIMP3_NO_SIMD // disable for portability
#endif
#define MINIMP3_NONSTANDARD_BUT_LOGICAL
#define MINIMP3_FLOAT_OUTPUT
/* use Ardour namespace for minimp3 symbols */
#include "ardour/minimp3.h"
class LIBARDOUR_API Mp3FileImportableSource : public ImportableSource {
public:
Mp3FileImportableSource (const std::string& path);
virtual ~Mp3FileImportableSource();
/* ImportableSource API */
uint32_t channels () const { return _info.channels; }
samplecnt_t length () const { return _length; }
samplecnt_t samplerate () const { return _info.hz; }
samplepos_t natural_position () const { return 0 ; }
void seek (samplepos_t pos);
samplecnt_t read (Sample*, samplecnt_t nframes);
bool clamped_at_unity () const { return false; }
samplecnt_t layer () const { return _info.layer; }
samplecnt_t bitrate () const { return _info.bitrate_kbps; }
samplecnt_t read_unlocked (Sample*, samplepos_t start, samplecnt_t cnt, uint32_t chn);
private:
void unmap_mem ();
int decode_mp3 (bool parse_only = false);
mp3dec_t _mp3d;
mp3dec_frame_info_t _info;
samplecnt_t _length;
int _fd;
const uint8_t* _map_addr;
size_t _map_length;
const uint8_t* _buffer;
size_t _remain;
samplepos_t _read_position;
mp3d_sample_t _pcm[MINIMP3_MAX_SAMPLES_PER_FRAME];
size_t _pcm_off;
int _n_frames;
};
}
#endif /* __ardour_mp3file_importable_source_h__ */
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