/* * 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 (mp3gain@hotmail.com) 735 W 255 N, Orem, UT 84057-4505 USA * -- blame him if you think this runs too slowly, or the coding is otherwise flawed * * 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> #include <bfc/platform/export.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 DLLEXPORT void * WACreateRGContext(); DLLEXPORT void WAFreeRGContext(void *context); int DLLEXPORT WAInitGainAnalysis(void *context, long samplefreq); int DLLEXPORT WAAnalyzeSamples(void *context, const Float_t* left_samples, const Float_t* right_samples, size_t num_samples, int num_channels); int DLLEXPORT WAResetSampleFrequency ( void *context, long samplefreq ); Float_t DLLEXPORT WAGetTitleGain(void *context); Float_t DLLEXPORT WAGetAlbumGain(void *context); #ifdef __cplusplus } #endif #endif /* GAIN_ANALYSIS_H */