1 /* 2 * Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com> 3 * Copyright (C) 2019 Robin Gareus <robin@gareus.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 */ 19 20 #ifndef _ardour_mp3file_importable_source_h_ 21 #define _ardour_mp3file_importable_source_h_ 22 23 #include <stdint.h> 24 25 #include "ardour/libardour_visibility.h" 26 #include "ardour/types.h" 27 #include "ardour/importable_source.h" 28 29 namespace ARDOUR { 30 31 /* 64bit CPUs always have SSE2, armhf/aarch64 has NEON, 32 * except apple/OSX does not provide immintrin.h 33 */ 34 #if defined ( __i386__) || defined (__PPC__) || defined (__APPLE__) 35 #define MINIMP3_NO_SIMD // disable for portability 36 #endif 37 38 #define MINIMP3_NONSTANDARD_BUT_LOGICAL 39 #define MINIMP3_FLOAT_OUTPUT 40 41 /* use Ardour namespace for minimp3 symbols */ 42 #include "ardour/minimp3.h" 43 44 class LIBARDOUR_API Mp3FileImportableSource : public ImportableSource { 45 public: 46 Mp3FileImportableSource (const std::string& path); 47 virtual ~Mp3FileImportableSource(); 48 49 /* ImportableSource API */ channels()50 uint32_t channels () const { return _info.channels; } length()51 samplecnt_t length () const { return _length; } samplerate()52 samplecnt_t samplerate () const { return _info.hz; } natural_position()53 samplepos_t natural_position () const { return 0 ; } 54 void seek (samplepos_t pos); 55 samplecnt_t read (Sample*, samplecnt_t nframes); 56 clamped_at_unity()57 bool clamped_at_unity () const { return false; } 58 layer()59 samplecnt_t layer () const { return _info.layer; } bitrate()60 samplecnt_t bitrate () const { return _info.bitrate_kbps; } 61 samplecnt_t read_unlocked (Sample*, samplepos_t start, samplecnt_t cnt, uint32_t chn); 62 63 private: 64 void unmap_mem (); 65 int decode_mp3 (bool parse_only = false); 66 67 mp3dec_t _mp3d; 68 mp3dec_frame_info_t _info; 69 samplecnt_t _length; 70 71 int _fd; 72 const uint8_t* _map_addr; 73 size_t _map_length; 74 75 const uint8_t* _buffer; 76 size_t _remain; 77 78 samplepos_t _read_position; 79 mp3d_sample_t _pcm[MINIMP3_MAX_SAMPLES_PER_FRAME]; 80 size_t _pcm_off; 81 int _n_frames; 82 }; 83 84 } 85 86 #endif /* __ardour_mp3file_importable_source_h__ */ 87