1 files changed, 159 insertions, 0 deletions
diff --git a/gst-libs/gst/resample/resample.h b/gst-libs/gst/resample/resample.h
new file mode 100644
index 00000000..1cc36edd
--- /dev/null
+++ b/gst-libs/gst/resample/resample.h
@@ -0,0 +1,159 @@
+/* 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__ */
+