1 /* grabbag - Convenience lib for various routines common to several tools
2 * Copyright (C) 2002,2003 Josh Coalson
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.
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.
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.
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
25 /* This .h cannot be included by itself; #include "share/grabbag.h" instead. */
27 #ifndef GRABBAG__REPLAYGAIN_H
28 #define GRABBAG__REPLAYGAIN_H
30 #include "FLAC/metadata.h"
36 extern const unsigned GRABBAG__REPLAYGAIN_MAX_TAG_SPACE_REQUIRED;
38 FLAC__bool grabbag__replaygain_is_valid_sample_frequency(unsigned sample_frequency);
40 FLAC__bool grabbag__replaygain_init(unsigned sample_frequency);
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);
45 void grabbag__replaygain_get_album(float *gain, float *peak);
46 void grabbag__replaygain_get_title(float *gain, float *peak);
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);
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);