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131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/* Resampling library
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* Copyright (C) <2001> David Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __RESAMPLE_H__
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#define __RESAMPLE_H__
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#include "functable.h"
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#include "buffer.h"
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifdef WIN32
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#define rint(x) (floor((x)+0.5))
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#endif
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typedef enum {
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RESAMPLE_FORMAT_S16 = 0,
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RESAMPLE_FORMAT_S32,
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RESAMPLE_FORMAT_F32,
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RESAMPLE_FORMAT_F64
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} ResampleFormat;
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typedef void (*ResampleCallback) (void *);
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typedef struct _ResampleState ResampleState;
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struct _ResampleState {
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/* parameters */
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int n_channels;
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ResampleFormat format;
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int filter_length;
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double i_rate;
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double o_rate;
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int method;
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/* internal parameters */
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int need_reinit;
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double halftaps;
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/* filter state */
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unsigned char *o_buf;
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int o_size;
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AudioresampleBufferQueue *queue;
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int eos;
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int started;
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int sample_size;
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unsigned char *buffer;
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int buffer_len;
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int buffer_filled;
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double i_start;
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double o_start;
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double i_inc;
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double o_inc;
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double sinc_scale;
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double i_end;
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double o_end;
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int i_samples;
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int o_samples;
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//void *i_buf;
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Functable *ft;
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double *out_tmp;
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};
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void resample_init (void);
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void resample_cleanup (void);
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ResampleState *resample_new (void);
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void resample_free (ResampleState *state);
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void resample_add_input_data (ResampleState * r, void *data, int size,
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ResampleCallback free_func, void *closure);
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void resample_input_eos (ResampleState *r);
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void resample_input_flush (ResampleState *r);
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void resample_input_pushthrough (ResampleState *r);
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int resample_get_output_size_for_input (ResampleState * r, int size);
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int resample_get_input_size_for_output (ResampleState * r, int size);
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int resample_get_output_size (ResampleState *r);
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int resample_get_output_data (ResampleState *r, void *data, int size);
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void resample_set_filter_length (ResampleState *r, int length);
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void resample_set_input_rate (ResampleState *r, double rate);
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void resample_set_output_rate (ResampleState *r, double rate);
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void resample_set_n_channels (ResampleState *r, int n_channels);
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void resample_set_format (ResampleState *r, ResampleFormat format);
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void resample_set_method (ResampleState *r, int method);
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int resample_format_size (ResampleFormat format);
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void resample_scale_ref (ResampleState * r);
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void resample_scale_functable (ResampleState * r);
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#endif /* __RESAMPLE_H__ */
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