107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#pragma once
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#include <stdlib.h>
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typedef unsigned long nframes_t;
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struct Peak {
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float min;
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float max;
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};
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class Audio_File;
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class Peaks
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{
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struct peakdata {
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int chunksize; /* should always be a power of 2 */
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Peak data[];
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};
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struct peakbuffer {
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size_t size; /* total allocation size */
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size_t len; /* number of peaks */
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nframes_t offset; /* starting sample */
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peakdata *buf;
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peakbuffer ( )
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{
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size = len = 0;
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}
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};
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static peakbuffer _peakbuf;
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Audio_File *_clip;
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size_t _len;
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mutable float _fpp;
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void read_peaks ( int s, int 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 ( );
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public:
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Peaks ( )
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{
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_len = 0;
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_clip = NULL;
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}
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Peaks ( Audio_File *c )
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{
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_len = 0;
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_clip = c;
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}
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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, int s, int e ) const;
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void downsample ( Peak *peaks, int s, int e, float *mhi, float *mlo ) const;
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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;
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bool make_peaks ( int chunksize );
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Peak & peak ( nframes_t start, nframes_t end ) const;
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Peak & operator[] ( int X ) const;
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};
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