non/Clip.C

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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. */
/*******************************************************************************/
#include "Clip.H"
#include "Timeline.H"
#include <sndfile.h>
#include <stdlib.h>
#include <string.h>
Clip::Clip ( void ) : _peaks( this )
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{
_filename = NULL;
_length = 0;
}
/* Clip::Clip ( const char *filename ) : _peaks( this ) */
/* { */
/* _filename = filename; */
/* SNDFILE *in; */
/* SF_INFO si; */
/* memset( &si, 0, sizeof( si ) ); */
/* if ( ! ( in = sf_open( filename, SFM_READ, &si ) ) ) */
/* { */
/* printf( "couldn't open file\n" ); */
/* return; */
/* } */
/* if ( si.channels != 1 ) */
/* { */
/* printf( "error: incompatible format\n" ); */
/* return; */
/* } */
/* if ( si.samplerate != timeline.sample_rate ) */
/* { */
/* printf( "error: samplerate mismatch!\n" ); */
/* return; */
/* } */
/* _length = si.frames; */
/* sf_close( in ); */
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/* _peaks.open(); */
/* } */
Clip *
Clip::from_file ( const char *filename )
{
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SNDFILE *in;
SF_INFO si;
Clip *c = NULL;
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memset( &si, 0, sizeof( si ) );
if ( ! ( in = sf_open( filename, SFM_READ, &si ) ) )
{
printf( "couldn't open file\n" );
return NULL;
}
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if ( si.channels != 1 )
{
printf( "error: incompatible format\n" );
goto invalid;
}
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if ( si.samplerate != timeline.sample_rate )
{
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printf( "error: samplerate mismatch!\n" );
goto invalid;
}
c = new Clip;
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c->_filename = filename;
c->_length = si.frames;
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sf_close( in );
c->_peaks.open();
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return c;
invalid:
sf_close( in );
return NULL;
}
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bool
Clip::open ( void )
{
SF_INFO si;
memset( &si, 0, sizeof( si ) );
if ( ! ( _in = sf_open( _filename, SFM_READ, &si ) ) )
return false;
return true;
}
void
Clip::close ( void )
{
sf_close( _in );
}
void
Clip::seek ( nframes_t offset )
{
sf_seek( _in, offset, SEEK_SET );
}
nframes_t
Clip::read ( sample_t *buf, nframes_t len )
{
return sf_read_float ( _in, buf, len );
}
/** read samples from /start/ to /end/ into /buf/ */
nframes_t
Clip::read ( sample_t *buf, nframes_t start, nframes_t end )
{
open();
seek( start );
nframes_t len = read( buf, end - start );
close();
return len;
}