1 /*
2  *  ReplayGainAnalysis - analyzes input samples and give the recommended dB change
3  *  Copyright (C) 2001 David Robinson and Glen Sawyer
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 St, Fifth Floor, Boston, MA  02110-1301  USA
18  *
19  *  concept and filter values by David Robinson (David@Robinson.org)
20  *    -- blame him if you think the idea is flawed
21  *  coding by Glen Sawyer (glensawyer@hotmail.com) 442 N 700 E, Provo, UT 84606 USA
22  *    -- blame him if you think this runs too slowly, or the coding is otherwise flawed
23  *
24  *  For an explanation of the concepts and the basic algorithms involved, go to:
25  *    http://www.replaygain.org/
26  */
27 
28 #ifndef GAIN_ANALYSIS_H
29 #define GAIN_ANALYSIS_H
30 
31 #include <stddef.h>
32 
33 #define GAIN_NOT_ENOUGH_SAMPLES  -24601
34 #define GAIN_ANALYSIS_ERROR           0
35 #define GAIN_ANALYSIS_OK              1
36 
37 #define INIT_GAIN_ANALYSIS_ERROR      0
38 #define INIT_GAIN_ANALYSIS_OK         1
39 
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43 
44 typedef double  Float_t;         // Type used for filtering
45 
46 int     InitGainAnalysis ( long samplefreq );
47 int     AnalyzeSamples   ( const Float_t* left_samples, const Float_t* right_samples, size_t num_samples, int num_channels );
48 int		ResetSampleFrequency ( long samplefreq );
49 Float_t   GetTitleGain     ( void );
50 Float_t   GetAlbumGain     ( void );
51 
52 #ifdef __cplusplus
53 }
54 #endif
55 
56 #endif /* GAIN_ANALYSIS_H */
57