replaygain.h (3110B)
1 /* grabbag - Convenience lib for various routines common to several tools 2 * Copyright (C) 2002,2003,2004,2005 Josh Coalson 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 2 7 * of the License, or (at your option) any later version. 8 * 9 * This program 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 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 FLAC__bool grabbag__replaygain_is_valid_sample_frequency(unsigned sample_frequency); 39 40 FLAC__bool grabbag__replaygain_init(unsigned sample_frequency); 41 42 /* 'bps' must be valid for FLAC, i.e. >=4 and <= 32 */ 43 FLAC__bool grabbag__replaygain_analyze(const FLAC__int32 * const input[], FLAC__bool is_stereo, unsigned bps, unsigned samples); 44 45 void grabbag__replaygain_get_album(float *gain, float *peak); 46 void grabbag__replaygain_get_title(float *gain, float *peak); 47 48 /* These three functions return an error string on error, or NULL if successful */ 49 const char *grabbag__replaygain_analyze_file(const char *filename, float *title_gain, float *title_peak); 50 const char *grabbag__replaygain_store_to_vorbiscomment(FLAC__StreamMetadata *block, float album_gain, float album_peak, float title_gain, float title_peak); 51 const char *grabbag__replaygain_store_to_vorbiscomment_album(FLAC__StreamMetadata *block, float album_gain, float album_peak); 52 const char *grabbag__replaygain_store_to_vorbiscomment_title(FLAC__StreamMetadata *block, float title_gain, float title_peak); 53 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); 54 const char *grabbag__replaygain_store_to_file_album(const char *filename, float album_gain, float album_peak, FLAC__bool preserve_modtime); 55 const char *grabbag__replaygain_store_to_file_title(const char *filename, float title_gain, float title_peak, FLAC__bool preserve_modtime); 56 57 FLAC__bool grabbag__replaygain_load_from_vorbiscomment(const FLAC__StreamMetadata *block, FLAC__bool album_mode, double *gain, double *peak); 58 double grabbag__replaygain_compute_scale_factor(double peak, double gain, double preamp, FLAC__bool prevent_clipping); 59 60 #ifdef __cplusplus 61 } 62 #endif 63 64 #endif