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66 lines
2.3 KiB
66 lines
2.3 KiB
/*****************************************************************************
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* window.h : Header for FFT window routines
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*****************************************************************************
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* Copyright (C) 2014 Ronald Wright
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* $Id$
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*
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* Author: Ronald Wright <logiconcepts819@gmail.com>
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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 Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef VLC_VISUAL_WINDOW_H_
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#define VLC_VISUAL_WINDOW_H_
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#include <vlc_common.h>
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/* Window type enum */
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enum _enum_window_type { NONE, HANN, FLATTOP, BLACKMANHARRIS, KAISER };
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/* Window context structure */
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struct _struct_window_context {
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/* Storage for window function values */
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float * pf_window_table;
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/* Buffer size for the window */
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int i_buffer_size;
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};
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typedef enum _enum_window_type window_type;
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/* Window parameter structure */
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struct _struct_window_param {
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/* Window type */
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window_type wind_type;
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/* Kaiser window parameter */
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float f_kaiser_alpha;
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};
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/* Prototypes for the window function */
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typedef struct _struct_window_context window_context;
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typedef struct _struct_window_param window_param;
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void window_get_param( vlc_object_t * p_aout, window_param * p_param );
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bool window_init( int i_buffer_size, window_param * p_param,
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window_context * p_ctx );
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void window_scale_in_place( int16_t * p_buffer, window_context * p_ctx );
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void window_close( window_context * p_ctx );
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/* Macro for defining a new window context */
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#define DEFINE_WIND_CONTEXT(name) window_context name = {NULL, 0}
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#endif /* include-guard */
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