/* 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 __GST_RESAMPLE_H__ #define __GST_RESAMPLE_H__ #include <glib.h> G_BEGIN_DECLS typedef enum { GST_RESAMPLE_NEAREST = 0, GST_RESAMPLE_BILINEAR, GST_RESAMPLE_SINC_SLOW, GST_RESAMPLE_SINC, } gst_resample_method; typedef enum { GST_RESAMPLE_S16 = 0, GST_RESAMPLE_FLOAT } gst_resample_format; typedef struct gst_resample_s gst_resample_t; struct gst_resample_s { /* parameters */ gst_resample_method method; int channels; int verbose; gst_resample_format format; 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[2]; union { struct { double *out_tmp; int out_tmp_len; } s; double padding[8]; } hack_union; /* methods */ void (*scale)(gst_resample_t *r); double ack; }; void gst_resample_init(gst_resample_t *r); void gst_resample_reinit(gst_resample_t *r); void gst_resample_close (gst_resample_t * r); void gst_resample_scale(gst_resample_t *r, void *i_buf, unsigned int size); G_END_DECLS #endif /* __GST_RESAMPLE_H__ */