116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
|
|
/*******************************************************************************/
|
|
/* Copyright (C) 2008 Jonathan Moore Liles */
|
|
/* */
|
|
/* This program is free software; you can redistribute it and/or modify it */
|
|
/* under the terms of the GNU General Public License as published by the */
|
|
/* Free Software Foundation; either version 2 of the License, or (at your */
|
|
/* option) any later version. */
|
|
/* */
|
|
/* This program 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 General Public License for */
|
|
/* more details. */
|
|
/* */
|
|
/* You should have received a copy of the GNU General Public License along */
|
|
/* with This program; see the file COPYING. If not,write to the Free Software */
|
|
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
/*******************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
#include <stdlib.h>
|
|
|
|
typedef unsigned long nframes_t;
|
|
|
|
struct Peak {
|
|
float min;
|
|
float max;
|
|
};
|
|
|
|
class Audio_File;
|
|
|
|
class Peaks
|
|
{
|
|
|
|
struct peakdata {
|
|
|
|
int chunksize; /* should always be a power of 2 */
|
|
Peak data[];
|
|
|
|
};
|
|
|
|
struct peakbuffer {
|
|
|
|
size_t size; /* total allocation size */
|
|
size_t len; /* number of peaks */
|
|
nframes_t offset; /* starting sample */
|
|
|
|
peakdata *buf;
|
|
|
|
peakbuffer ( )
|
|
{
|
|
size = len = 0;
|
|
}
|
|
};
|
|
|
|
static peakbuffer peakbuf;
|
|
|
|
Audio_File *_clip;
|
|
int _channel;
|
|
|
|
peakdata *_peaks;
|
|
|
|
size_t _len;
|
|
|
|
mutable float _fpp;
|
|
|
|
void read_peaks ( int s, int e, int npeaks, int chunksize ) const;
|
|
int clip_read_peaks ( Peak *peaks, int npeaks, int chunksize ) const;
|
|
|
|
const char *peakname ( const char *filename ) const;
|
|
|
|
Peak & peak ( nframes_t start, nframes_t end ) const;
|
|
|
|
// Peaks ( );
|
|
|
|
public:
|
|
|
|
Peaks ( )
|
|
{
|
|
_peaks = new peakdata;
|
|
|
|
_peaks->chunksize = 0;
|
|
_len = 0;
|
|
_clip = NULL;
|
|
_channel = 0;
|
|
|
|
}
|
|
|
|
Peaks ( Audio_File *c )
|
|
{
|
|
_peaks = new peakdata;
|
|
|
|
_peaks->chunksize = 0;
|
|
_len = 0;
|
|
_clip = c;
|
|
_channel = 0;
|
|
}
|
|
|
|
void clip ( Audio_File *c ) { _clip = c; }
|
|
void channel ( int v ) { _channel = v; }
|
|
|
|
void fill_buffer ( float fpp, int s, int e ) const;
|
|
|
|
void downsample ( Peak *peaks, int s, int e, float *mhi, float *mlo ) const;
|
|
void read ( int X, float *hi, float *lo ) const;
|
|
bool open ( void );
|
|
float normalization_factor( float fpp, nframes_t start, nframes_t end ) const;
|
|
|
|
bool current ( void ) const;
|
|
bool make_peaks ( int chunksize );
|
|
|
|
Peak & operator[] ( int X ) const;
|
|
|
|
};
|