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-rw-r--r--gst-libs/gst/resample/resample.h159
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diff --git a/gst-libs/gst/resample/resample.h b/gst-libs/gst/resample/resample.h
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+/* Resampling library
+ * Copyright (C) <2001> David Schleef <ds@schleef.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __RESAMPLE_H__
+#define __RESAMPLE_H__
+
+#include <config.h>
+
+typedef struct resample_s resample_t;
+
+struct resample_s {
+ /* parameters */
+
+ int method;
+ int channels;
+ int verbose;
+
+ int filter_length;
+
+ double i_rate;
+ double o_rate;
+
+ void *priv;
+
+ void *(*get_buffer)(void *priv, unsigned int size);
+
+ /* internal parameters */
+
+ double halftaps;
+
+ /* filter state */
+
+ void *buffer;
+ int buffer_len;
+
+ double i_start;
+ double o_start;
+
+ double i_start_buf;
+ double i_end_buf;
+
+ double i_inc;
+ double o_inc;
+
+ double i_end;
+ double o_end;
+
+ int i_samples;
+ int o_samples;
+
+ void *i_buf, *o_buf;
+
+ double acc[10];
+
+ /* methods */
+ void (*scale)(resample_t *r);
+
+ double ack;
+};
+
+enum{
+ RESAMPLE_NEAREST = 0,
+ RESAMPLE_BILINEAR,
+ RESAMPLE_SINC_SLOW,
+ RESAMPLE_SINC,
+};
+
+void resample_init(resample_t *r);
+void resample_reinit(resample_t *r);
+
+void resample_scale(resample_t *r, void *i_buf, unsigned int size);
+
+void resample_nearest(resample_t *r);
+void resample_bilinear(resample_t *r);
+void resample_sinc(resample_t *r);
+void resample_sinc_slow(resample_t *r);
+
+
+typedef struct functable_s functable_t;
+struct functable_s {
+ double start;
+ double offset;
+ int len;
+
+ double invoffset;
+
+ double scale;
+ double scale2;
+
+ double (*func_x)(void *,double x);
+ double (*func_dx)(void *,double x);
+
+ double (*func2_x)(void *,double x);
+ double (*func2_dx)(void *,double x);
+
+ double *fx;
+ double *fdx;
+
+ void *priv;
+};
+
+void functable_init(functable_t *t);
+double functable_eval(functable_t *t,double x);
+
+double functable_fir(functable_t *t,double x0,int n,double *data,int len);
+void functable_fir2(functable_t *t,double *r0, double *r1, double x0,
+ int n,double *data,int len);
+
+double functable_sinc(void *p, double x);
+double functable_dsinc(void *p, double x);
+double functable_window_std(void *p, double x);
+double functable_window_dstd(void *p, double x);
+double functable_window_boxcar(void *p, double x);
+double functable_window_dboxcar(void *p, double x);
+
+/* math lib stuff */
+
+void conv_double_short_table(double *dest, short *src, int n);
+void conv_double_short_unroll(double *dest, short *src, int n);
+void conv_double_short_ref(double *dest, short *src, int n);
+#ifdef HAVE_CPU_PPC
+void conv_double_short_altivec(double *dest, short *src, int n);
+#endif
+
+void conv_short_double_ref(short *dest, double *src, int n);
+#ifdef HAVE_CPU_PPC
+void conv_short_double_ppcasm(short *dest, double *src, int n);
+#endif
+
+#ifdef HAVE_CPU_PPC
+#define conv_double_short conv_double_short_table
+#define conv_short_double conv_short_double_ppcasm
+#else
+#define conv_double_short conv_double_short_ref
+#define conv_short_double conv_short_double_ref
+#endif
+
+void conv_double_short_dstr(double *dest, short *src, int n, int dstr);
+void conv_short_double_sstr(short *dest, double *src, int n, int dstr);
+
+#endif /* __RESAMPLE_H__ */
+