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