non/Timeline/Peaks.H

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/*******************************************************************************/
/* 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. */
/*******************************************************************************/
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#pragma once
#include <stdlib.h>
#include "types.h"
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;
}
};
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static peakbuffer _peakbuf;
Audio_File *_clip;
size_t _len;
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mutable float _fpp;
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int read_peaks ( nframes_t s, nframes_t e, int npeaks, int chunksize ) const;
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int read_source_peaks ( Peak *peaks, nframes_t s, int npeaks, int chunksize ) const;
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int read_source_peaks ( Peak *peaks, int npeaks, int chunksize ) const;
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int read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, int chunksize ) const;
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// const char *peakname ( const char *filename ) const;
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// Peaks ( );
public:
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Peaks ( )
{
_len = 0;
_clip = NULL;
}
Peaks ( Audio_File *c )
{
_len = 0;
_clip = c;
}
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Peak *peakbuf ( void ) const { return Peaks::_peakbuf.buf->data; }
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void clip ( Audio_File *c ) { _clip = c; }
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int fill_buffer ( float fpp, nframes_t s, nframes_t e ) const;
void downsample ( Peak *peaks, int s, int e, float *mhi, float *mlo ) const;
void read ( int X, float *hi, float *lo ) const;
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bool open ( void );
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float normalization_factor( float fpp, nframes_t start, nframes_t end ) const;
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bool current ( void ) const;
bool make_peaks ( int chunksize );
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Peak & peak ( nframes_t start, nframes_t end ) const;
Peak & operator[] ( int X ) const;
};
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#include <stdio.h>
class Peak_Writer
{
static const int VERSION_MAJOR = 0;
static const int VERSION_MINOR = 1;
FILE *_fp;
Peak *_peak;
int _chunksize;
int _channels;
int _index;
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public:
Peak_Writer ( const char *filename, int chunksize, int channels );
~Peak_Writer ( );
void write_header ( void );
void write ( sample_t *buf, nframes_t nframes );
};