cannam@86: /* grabbag - Convenience lib for various routines common to several tools
cannam@86:  * Copyright (C) 2002,2003,2004,2005,2006,2007  Josh Coalson
cannam@86:  *
cannam@86:  * This library is free software; you can redistribute it and/or
cannam@86:  * modify it under the terms of the GNU Lesser General Public
cannam@86:  * License as published by the Free Software Foundation; either
cannam@86:  * version 2.1 of the License, or (at your option) any later version.
cannam@86:  *
cannam@86:  * This library is distributed in the hope that it will be useful,
cannam@86:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@86:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
cannam@86:  * Lesser General Public License for more details.
cannam@86:  *
cannam@86:  * You should have received a copy of the GNU Lesser General Public
cannam@86:  * License along with this library; if not, write to the Free Software
cannam@86:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@86:  */
cannam@86: 
cannam@86: /*
cannam@86:  * This wraps the replaygain_analysis lib, which is LGPL.  This wrapper
cannam@86:  * allows analysis of different input resolutions by automatically
cannam@86:  * scaling the input signal
cannam@86:  */
cannam@86: 
cannam@86: /* This .h cannot be included by itself; #include "share/grabbag.h" instead. */
cannam@86: 
cannam@86: #ifndef GRABBAG__REPLAYGAIN_H
cannam@86: #define GRABBAG__REPLAYGAIN_H
cannam@86: 
cannam@86: #include "FLAC/metadata.h"
cannam@86: 
cannam@86: #ifdef __cplusplus
cannam@86: extern "C" {
cannam@86: #endif
cannam@86: 
cannam@86: extern const unsigned GRABBAG__REPLAYGAIN_MAX_TAG_SPACE_REQUIRED;
cannam@86: 
cannam@86: extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_REFERENCE_LOUDNESS; /* = "REPLAYGAIN_REFERENCE_LOUDNESS" */
cannam@86: extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_TITLE_GAIN; /* = "REPLAYGAIN_TRACK_GAIN" */
cannam@86: extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_TITLE_PEAK; /* = "REPLAYGAIN_TRACK_PEAK" */
cannam@86: extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_ALBUM_GAIN; /* = "REPLAYGAIN_ALBUM_GAIN" */
cannam@86: extern const FLAC__byte * const GRABBAG__REPLAYGAIN_TAG_ALBUM_PEAK; /* = "REPLAYGAIN_ALBUM_PEAK" */
cannam@86: 
cannam@86: FLAC__bool grabbag__replaygain_is_valid_sample_frequency(unsigned sample_frequency);
cannam@86: 
cannam@86: FLAC__bool grabbag__replaygain_init(unsigned sample_frequency);
cannam@86: 
cannam@86: /* 'bps' must be valid for FLAC, i.e. >=4 and <= 32 */
cannam@86: FLAC__bool grabbag__replaygain_analyze(const FLAC__int32 * const input[], FLAC__bool is_stereo, unsigned bps, unsigned samples);
cannam@86: 
cannam@86: void grabbag__replaygain_get_album(float *gain, float *peak);
cannam@86: void grabbag__replaygain_get_title(float *gain, float *peak);
cannam@86: 
cannam@86: /* These three functions return an error string on error, or NULL if successful */
cannam@86: const char *grabbag__replaygain_analyze_file(const char *filename, float *title_gain, float *title_peak);
cannam@86: const char *grabbag__replaygain_store_to_vorbiscomment(FLAC__StreamMetadata *block, float album_gain, float album_peak, float title_gain, float title_peak);
cannam@86: const char *grabbag__replaygain_store_to_vorbiscomment_reference(FLAC__StreamMetadata *block);
cannam@86: const char *grabbag__replaygain_store_to_vorbiscomment_album(FLAC__StreamMetadata *block, float album_gain, float album_peak);
cannam@86: const char *grabbag__replaygain_store_to_vorbiscomment_title(FLAC__StreamMetadata *block, float title_gain, float title_peak);
cannam@86: 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);
cannam@86: const char *grabbag__replaygain_store_to_file_reference(const char *filename, FLAC__bool preserve_modtime);
cannam@86: const char *grabbag__replaygain_store_to_file_album(const char *filename, float album_gain, float album_peak, FLAC__bool preserve_modtime);
cannam@86: const char *grabbag__replaygain_store_to_file_title(const char *filename, float title_gain, float title_peak, FLAC__bool preserve_modtime);
cannam@86: 
cannam@86: FLAC__bool grabbag__replaygain_load_from_vorbiscomment(const FLAC__StreamMetadata *block, FLAC__bool album_mode, FLAC__bool strict, double *reference, double *gain, double *peak);
cannam@86: double grabbag__replaygain_compute_scale_factor(double peak, double gain, double preamp, FLAC__bool prevent_clipping);
cannam@86: 
cannam@86: #ifdef __cplusplus
cannam@86: }
cannam@86: #endif
cannam@86: 
cannam@86: #endif