1 files changed, 104 insertions, 0 deletions
diff --git a/flow/gsl/gslosctable.h b/flow/gsl/gslosctable.h
new file mode 100644
index 0000000..021e5b9
--- /dev/null
+++ b/flow/gsl/gslosctable.h
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+/* GSL - Generic Sound Layer
+ * Copyright (C) 2001-2002 Tim Janik
+ *
+ * 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 (at your option) 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 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 __GSL_OSC_TABLE_H__
+#define __GSL_OSC_TABLE_H__
+
+#include <gsl/gsldefs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+/* --- structures & enums --- */
+typedef enum    /*< skip >*/
+{
+  GSL_OSC_WAVE_NONE,
+  GSL_OSC_WAVE_SINE,
+  GSL_OSC_WAVE_TRIANGLE,
+  GSL_OSC_WAVE_SAW_RISE,
+  GSL_OSC_WAVE_SAW_FALL,
+  GSL_OSC_WAVE_PEAK_RISE,
+  GSL_OSC_WAVE_PEAK_FALL,
+  GSL_OSC_WAVE_MOOG_SAW,
+  GSL_OSC_WAVE_SQUARE,
+  GSL_OSC_WAVE_PULSE_SAW
+} GslOscWaveForm;
+
+typedef struct
+{
+  gfloat         mix_freq;
+  GslOscWaveForm wave_form;
+  gpointer       entry_array;
+} GslOscTable;
+
+typedef struct
+{
+  gfloat        min_freq;
+  gfloat        max_freq;
+  guint         n_values;
+  const gfloat *values;	/* contains n_values+1 values with values[0]==values[n_values] */
+  /* integer stepping (block size dependant) */
+  guint32	n_frac_bits;
+  guint32	frac_bitmask;
+  gfloat	freq_to_step;		/* freq -> int.frac */
+  gfloat	phase_to_pos;		/* 0..1 -> int.frac */
+  gfloat	ifrac_to_float;		/* frac -> 0..1 float */
+  guint		min_pos, max_pos;	/* pulse extension */
+} GslOscWave;
+
+
+/* --- oscillator table --- */
+GslOscTable*    gsl_osc_table_create            (gfloat                  mix_freq,
+						 GslOscWaveForm          wave_form,
+						 double                (*filter_func) (double),
+						 guint                   n_freqs,
+						 const gfloat           *freqs);
+void            gsl_osc_table_lookup            (const GslOscTable      *table,
+						 gfloat                  freq,
+						 GslOscWave             *wave);
+void            gsl_osc_table_free              (GslOscTable            *table);
+
+
+/* --- oscillator wave utils --- */
+void            gsl_osc_wave_fill_buffer        (GslOscWaveForm          type,
+						 guint                   n_values,
+						 gfloat                 *values);
+void		gsl_osc_wave_extrema		(guint                   n_values,
+						 const gfloat		*values,
+						 gfloat			*min,
+						 gfloat			*max);
+void		gsl_osc_wave_normalize		(guint			 n_values,
+						 gfloat			*values,
+						 gfloat			 new_center,
+						 gfloat			 new_max);
+void		gsl_osc_wave_adjust_range	(guint			 n_values,
+						 gfloat			*values,
+						 gfloat			 min,
+						 gfloat			 max,
+						 gfloat			 new_center,
+						 gfloat			 new_max);
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __GSL_OSC_TABLE_H__ */