1 /* grabbag - Convenience lib for various routines common to several tools 2 * Copyright (C) 2002,2003,2004,2005,2006,2007 Josh Coalson 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 /* 20 * This wraps the replaygain_analysis lib, which is LGPL. This wrapper 21 * allows analysis of different input resolutions by automatically 22 * scaling the input signal 23 */ 24 25 /* This .h cannot be included by itself; #include "share/grabbag.h" instead. */ 26 27 #ifndef GRABBAG__REPLAYGAIN_H 28 #define GRABBAG__REPLAYGAIN_H 29 30 #include "FLAC/metadata.h" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 extern const unsigned GRABBAG__REPLAYGAIN_MAX_TAG_SPACE_REQUIRED; 37 38 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_REFERENCE_LOUDNESS; /* = "REPLAYGAIN_REFERENCE_LOUDNESS" */ 39 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_TITLE_GAIN; /* = "REPLAYGAIN_TRACK_GAIN" */ 40 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_TITLE_PEAK; /* = "REPLAYGAIN_TRACK_PEAK" */ 41 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_ALBUM_GAIN; /* = "REPLAYGAIN_ALBUM_GAIN" */ 42 extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_ALBUM_PEAK; /* = "REPLAYGAIN_ALBUM_PEAK" */ 43 44 FLAC__bool grabbag__replaygain_is_valid_sample_frequency(unsigned sample_frequency); 45 46 FLAC__bool grabbag__replaygain_init(unsigned sample_frequency); 47 48 /* 'bps' must be valid for FLAC, i.e. >=4 and <= 32 */ 49 FLAC__bool grabbag__replaygain_analyze(const FLAC__int32 * const input[], FLAC__bool is_stereo, unsigned bps, unsigned samples); 50 51 void grabbag__replaygain_get_album(float *gain, float *peak); 52 void grabbag__replaygain_get_title(float *gain, float *peak); 53 54 /* These three functions return an error string on error, or NULL if successful */ 55 const char *grabbag__replaygain_analyze_file(const char *filename, float *title_gain, float *title_peak); 56 const char *grabbag__replaygain_store_to_vorbiscomment(FLAC__StreamMetadata *block, float album_gain, float album_peak, float title_gain, float title_peak); 57 const char *grabbag__replaygain_store_to_vorbiscomment_reference(FLAC__StreamMetadata *block); 58 const char *grabbag__replaygain_store_to_vorbiscomment_album(FLAC__StreamMetadata *block, float album_gain, float album_peak); 59 const char *grabbag__replaygain_store_to_vorbiscomment_title(FLAC__StreamMetadata *block, float title_gain, float title_peak); 60 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); 61 const char *grabbag__replaygain_store_to_file_reference(const char *filename, FLAC__bool preserve_modtime); 62 const char *grabbag__replaygain_store_to_file_album(const char *filename, float album_gain, float album_peak, FLAC__bool preserve_modtime); 63 const char *grabbag__replaygain_store_to_file_title(const char *filename, float title_gain, float title_peak, FLAC__bool preserve_modtime); 64 65 FLAC__bool grabbag__replaygain_load_from_vorbiscomment(const FLAC__StreamMetadata *block, FLAC__bool album_mode, FLAC__bool strict, double *reference, double *gain, double *peak); 66 double grabbag__replaygain_compute_scale_factor(double peak, double gain, double preamp, FLAC__bool prevent_clipping); 67 68 #ifdef __cplusplus 69 } 70 #endif 71 72 #endif 73