non/Timeline/Peaks.H

107 lines
3.2 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;
size_t _len;
mutable float _fpp;
void read_peaks ( int s, int e, int npeaks, int chunksize ) const;
int read_source_peaks ( Peak *peaks, nframes_t s, int npeaks, int chunksize ) const;
int read_source_peaks ( Peak *peaks, int npeaks, int chunksize ) const;
int read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, int chunksize ) const;
const char *peakname ( const char *filename ) const;
// Peaks ( );
public:
Peaks ( )
{
_len = 0;
_clip = NULL;
}
Peaks ( Audio_File *c )
{
_len = 0;
_clip = c;
}
Peak *peakbuf ( void ) const { return Peaks::_peakbuf.buf->data; }
void clip ( Audio_File *c ) { _clip = c; }
int 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 & peak ( nframes_t start, nframes_t end ) const;
Peak & operator[] ( int X ) const;
};