79 lines
2.4 KiB
C
79 lines
2.4 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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#include "Audio_File.H"
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#include "Audio_File_SF.H"
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map <string, Audio_File*> Audio_File::_open_files;
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/** attmpet to open any supported filetype */
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Audio_File *
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Audio_File::from_file ( const char * filename )
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{
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Audio_File *a;
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if ( ( a = _open_files[ string( filename ) ] ) )
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return a;
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if ( ( a = Audio_File_SF::from_file( filename ) ) )
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goto done;
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// TODO: other formats
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return NULL;
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done:
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a->_peaks = new Peaks;
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a->_peaks->clip( a );
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a->_peaks->open();
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_open_files[ string( filename ) ] = a;
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return a;
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}
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bool
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Audio_File::read_peaks( float fpp, nframes_t start, nframes_t end, int *peaks, Peak **pbuf, int *channels )
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{
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Peaks pk;
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pk.clip( this );
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if ( ! pk.open() )
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return false;
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*peaks = pk.fill_buffer( fpp, start, end );
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*channels = this->channels();
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*pbuf = new Peak[ *peaks * *channels ];
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/* deinterlace */
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int k = 0;
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for ( int i = 0; i < *channels; i++ )
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for ( int j = i; j < *peaks * *channels; j += *channels )
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(*pbuf)[ k++ ] = pk.peakbuf()[ j ];
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return true;
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}
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