/* Convert to mono `Filter'

* Copyright (C) 1999 S.J. Tappin

* Derived from the Copy only filter (J.A. Bezemer 1998)

*

* Licensed under the terms of the GNU General Public License.

* ABSOLUTELY NO WARRANTY.

* See the file `COPYING' in this directory.

*/

#include "signpr_mono.h"

#include "signpr_general.h"

void

monoize_param_defaults (parampointer_t parampointer)

{

}

void

init_monoize_filter (int filterno, parampointer_t parampointer)

{

parampointer->buffer = init_buffer (0, 0);

parampointer->filterno = filterno;

}

void

delete_monoize_filter (parampointer_t parampointer)

{

delete_buffer (&parampointer->buffer);

}

sample_t

monoize_filter (parampointer_t parampointer)

{

sample_t sample;

longsample_t sum;

advance_current_pos (&parampointer->buffer, parampointer->filterno);

sample = get_from_buffer (&parampointer->buffer, 0);

sum.left = (sample.left + sample.right) / 2;

sample.left = sum.left;

sample.right = sum.left;

return sample;

}