1 /* grabbag - Convenience lib for various routines common to several tools 2 * Copyright (C) 2002-2009 Josh Coalson 3 * Copyright (C) 2011-2016 Xiph.Org Foundation 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 * 10 * This library 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 GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * This wraps the replaygain_analysis lib, which is LGPL. This wrapper 22 * allows analysis of different input resolutions by automatically 23 * scaling the input signal 24 */ 25 26 /* This .h cannot be included by itself; #include "share/grabbag.h" instead. */ 27 28 #ifndef GRABBAG__REPLAYGAIN_H 29 #define GRABBAG__REPLAYGAIN_H 30 31 #include "FLAC/metadata.h" 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 extern const unsigned GRABBAG__REPLAYGAIN_MAX_TAG_SPACE_REQUIRED; 38 39 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_REFERENCE_LOUDNESS; /* = "REPLAYGAIN_REFERENCE_LOUDNESS" */ 40 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_TITLE_GAIN; /* = "REPLAYGAIN_TRACK_GAIN" */ 41 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_TITLE_PEAK; /* = "REPLAYGAIN_TRACK_PEAK" */ 42 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_ALBUM_GAIN; /* = "REPLAYGAIN_ALBUM_GAIN" */ 43 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_ALBUM_PEAK; /* = "REPLAYGAIN_ALBUM_PEAK" */ 44 45 FLAC__bool grabbag__replaygain_is_valid_sample_frequency(unsigned sample_frequency); 46 47 FLAC__bool grabbag__replaygain_init(unsigned sample_frequency); 48 49 /* 'bps' must be valid for FLAC, i.e. >=4 and <= 32 */ 50 FLAC__bool grabbag__replaygain_analyze(const FLAC__int32 * const input[], FLAC__bool is_stereo, unsigned bps, unsigned samples); 51 52 void grabbag__replaygain_get_album(float *gain, float *peak); 53 void grabbag__replaygain_get_title(float *gain, float *peak); 54 55 /* These three functions return an error string on error, or NULL if successful */ 56 const char *grabbag__replaygain_analyze_file(const char *filename, float *title_gain, float *title_peak); 57 const char *grabbag__replaygain_store_to_vorbiscomment(FLAC__StreamMetadata *block, float album_gain, float album_peak, float title_gain, float title_peak); 58 const char *grabbag__replaygain_store_to_vorbiscomment_reference(FLAC__StreamMetadata *block); 59 const char *grabbag__replaygain_store_to_vorbiscomment_album(FLAC__StreamMetadata *block, float album_gain, float album_peak); 60 const char *grabbag__replaygain_store_to_vorbiscomment_title(FLAC__StreamMetadata *block, float title_gain, float title_peak); 61 const char *grabbag__replaygain_store_to_file(const char *filename, float album_gain, float album_peak, float title_gain, float title_peak, FLAC__bool preserve_modtime); 62 const char *grabbag__replaygain_store_to_file_reference(const char *filename, FLAC__bool preserve_modtime); 63 const char *grabbag__replaygain_store_to_file_album(const char *filename, float album_gain, float album_peak, FLAC__bool preserve_modtime); 64 const char *grabbag__replaygain_store_to_file_title(const char *filename, float title_gain, float title_peak, FLAC__bool preserve_modtime); 65 66 FLAC__bool grabbag__replaygain_load_from_vorbiscomment(const FLAC__StreamMetadata *block, FLAC__bool album_mode, FLAC__bool strict, double *reference, double *gain, double *peak); 67 double grabbag__replaygain_compute_scale_factor(double peak, double gain, double preamp, FLAC__bool prevent_clipping); 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif 74
