/* | |
* ReplayGainAnalysis - analyzes input samples and give the recommended dB change | |
* Copyright (C) 2001 David Robinson and Glen Sawyer | |
* | |
* This library is free software; you can redistribute it and/or | |
* modify it under the terms of the GNU Lesser General Public | |
* License as published by the Free Software Foundation; either | |
* version 2.1 of the License, or (at your option) any later version. | |
* | |
* This library is distributed in the hope that it will be useful, | |
* but WITHOUT ANY WARRANTY; without even the implied warranty of | |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
* Lesser General Public License for more details. | |
* | |
* You should have received a copy of the GNU Lesser General Public | |
* License along with this library; if not, write to the Free Software | |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
* | |
* concept and filter values by David Robinson (David@Robinson.org) | |
* -- blame him if you think the idea is flawed | |
* coding by Glen Sawyer (glensawyer@hotmail.com) 442 N 700 E, Provo, UT 84606 USA | |
* -- blame him if you think this runs too slowly, or the coding is otherwise flawed | |
* minor cosmetic tweaks to integrate with FLAC by Josh Coalson | |
* | |
* For an explanation of the concepts and the basic algorithms involved, go to: | |
* http://www.replaygain.org/ | |
*/ | |
#ifndef GAIN_ANALYSIS_H | |
#define GAIN_ANALYSIS_H | |
#include <stddef.h> | |
#define GAIN_NOT_ENOUGH_SAMPLES -24601 | |
#define GAIN_ANALYSIS_ERROR 0 | |
#define GAIN_ANALYSIS_OK 1 | |
#define INIT_GAIN_ANALYSIS_ERROR 0 | |
#define INIT_GAIN_ANALYSIS_OK 1 | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
typedef float Float_t; /* Type used for filtering */ | |
extern Float_t ReplayGainReferenceLoudness; /* in dB SPL, currently == 89.0 */ | |
int InitGainAnalysis ( long samplefreq ); | |
int AnalyzeSamples ( const Float_t* left_samples, const Float_t* right_samples, size_t num_samples, int num_channels ); | |
int ResetSampleFrequency ( long samplefreq ); | |
Float_t GetTitleGain ( void ); | |
Float_t GetAlbumGain ( void ); | |
#ifdef __cplusplus | |
} | |
#endif | |
#endif /* GAIN_ANALYSIS_H */ |