/usr/include/bse/gslwaveosc.hh is in libbse-dev 0.7.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#ifndef __GSL_WAVE_OSC_H__
#define __GSL_WAVE_OSC_H__
#include <bse/gsldefs.hh>
#include <bse/gslwavechunk.hh>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GSL_WAVE_OSC_FILTER_ORDER (8) /* <= GslConfig.wave_chunk_padding ! */
typedef struct
{
GslLong start_offset;
gint play_dir, channel;
gpointer wchunk_data;
GslWaveChunk* (*lookup_wchunk) (gpointer wchunk_data,
gfloat freq,
gfloat velocity);
gfloat fm_strength; /* linear: 0..1, exponential: n_octaves */
guint exponential_fm : 1;
gfloat cfreq; /* for ifreq == NULL */
} GslWaveOscConfig;
typedef struct
{
GslWaveOscConfig config;
guint last_mode;
gfloat last_sync_level, last_freq_level, last_mod_level;
GslWaveChunkBlock block;
gfloat *x; /* pointer into block */
guint cur_pos, istep; /* FIXME */
gdouble a[GSL_WAVE_OSC_FILTER_ORDER + 1]; /* order */
gdouble b[GSL_WAVE_OSC_FILTER_ORDER + 1]; /* reversed order */
gdouble y[GSL_WAVE_OSC_FILTER_ORDER + 1];
guint j; /* y[] index */
GslWaveChunk *wchunk;
gfloat mix_freq; /* bse_engine_sample_freq() */
gfloat step_factor;
gboolean done; /* FIXME. caution, this is TRUE only if
* (play_dir < 0 && cur_pos < 0) ||
* (play_dir > 0 && cur_pos > wchunk.length)
*/
} GslWaveOscData;
void gsl_wave_osc_config (GslWaveOscData *wosc,
GslWaveOscConfig *config);
void gsl_wave_osc_reset (GslWaveOscData *wosc);
gboolean gsl_wave_osc_process (GslWaveOscData *wosc,
guint n_values,
const gfloat *ifreq,
const gfloat *mod,
const gfloat *sync,
gfloat *mono_out);
void gsl_wave_osc_retrigger (GslWaveOscData *wosc,
gfloat freq);
void gsl_wave_osc_set_filter (GslWaveOscData *wosc,
gfloat freq,
gboolean clear_state);
void gsl_wave_osc_init (GslWaveOscData *wosc);
void gsl_wave_osc_shutdown (GslWaveOscData *wosc);
GslLong gsl_wave_osc_cur_pos (GslWaveOscData *wosc);
/* setup:
* wosc = g_new0 (GslWaveOscData, 1);
* wosc->mix_freq = bse_engine_sample_freq ();
*/
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GSL_WAVE_OSC_H__ */
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