144 lines
4.1 KiB
C++
144 lines
4.1 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>
|
|
|
|
#include "types.h"
|
|
|
|
struct Peak {
|
|
float min;
|
|
float max;
|
|
|
|
float normalization_factor ( void ) const;
|
|
};
|
|
|
|
#include <stdio.h>
|
|
|
|
class Audio_File;
|
|
|
|
class Peaks
|
|
{
|
|
|
|
struct peakdata {
|
|
|
|
nframes_t 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;
|
|
}
|
|
};
|
|
|
|
class Streamer
|
|
{
|
|
FILE *_fp;
|
|
Peak *_peak;
|
|
int _chunksize;
|
|
int _channels;
|
|
int _index;
|
|
|
|
/* not permitted */
|
|
Streamer ( const Streamer &rhs );
|
|
const Streamer &operator= ( const Streamer &rhs );
|
|
|
|
public:
|
|
|
|
Streamer ( const char *filename, int channels, nframes_t chunksize );
|
|
~Streamer ( );
|
|
|
|
void write ( sample_t *buf, nframes_t nframes );
|
|
|
|
};
|
|
|
|
class Builder
|
|
{
|
|
FILE *fp;
|
|
size_t last_block_pos;
|
|
const Peaks *_peaks;
|
|
|
|
void write_block_header ( nframes_t chunksize );
|
|
|
|
public:
|
|
|
|
bool make_peaks_mipmap ( void );
|
|
bool make_peaks ( void );
|
|
|
|
Builder ( const Peaks *peaks );
|
|
};
|
|
|
|
static peakbuffer _peakbuf;
|
|
|
|
Audio_File *_clip;
|
|
|
|
mutable float _fpp;
|
|
|
|
int read_peaks ( nframes_t s, nframes_t e, int npeaks, nframes_t chunksize ) const;
|
|
int read_source_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunksize ) const;
|
|
int read_source_peaks ( Peak *peaks, int npeaks, nframes_t chunksize ) const;
|
|
int read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunksize ) const;
|
|
|
|
Streamer * volatile _peak_writer; /* exists when streaming peaks to disk */
|
|
|
|
/* not permitted */
|
|
Peaks ( const Peaks &rhs );
|
|
const Peaks &operator= ( const Peaks &rhs );
|
|
|
|
public:
|
|
|
|
static bool mipmapped_peakfiles;
|
|
|
|
static const int cache_minimum;
|
|
static const int cache_levels;
|
|
static const int cache_step;
|
|
|
|
|
|
|
|
Peaks ( Audio_File *c );
|
|
~Peaks ( );
|
|
|
|
Peak *peakbuf ( void ) const { return Peaks::_peakbuf.buf->data; }
|
|
void clip ( Audio_File *c ) { _clip = c; }
|
|
|
|
int fill_buffer ( float fpp, nframes_t s, nframes_t e ) const;
|
|
|
|
void read ( int X, float *hi, float *lo ) const;
|
|
bool ready ( nframes_t s, int npeaks, nframes_t chunksize ) const;
|
|
|
|
bool current ( void ) const;
|
|
bool make_peaks ( void ) const;
|
|
bool make_peaks_mipmap ( void ) const;
|
|
|
|
void prepare_for_writing ( void );
|
|
void finish_writing ( void );
|
|
void write ( sample_t *buf, nframes_t nframes );
|
|
};
|