2 * Copyright (C) <2001> David A. Schleef <ds@schleef.org>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
30 #include <liboil/liboil.h>
32 #include <audioresample/resample.h>
33 #include <audioresample/buffer.h>
34 #include <audioresample/debug.h>
36 void resample_scale_ref (ResampleState * r);
37 void resample_scale_functable (ResampleState * r);
44 static int inited = 0;
57 r = malloc (sizeof (ResampleState));
58 memset (r, 0, sizeof (ResampleState));
60 r->filter_length = 16;
63 if (r->filter_length & 1) {
66 r->o_start = r->o_inc * 0.5;
69 r->queue = audioresample_buffer_queue_new ();
70 r->out_tmp = malloc (10000 * sizeof (double));
78 resample_free (ResampleState * r)
84 functable_free (r->ft);
87 audioresample_buffer_queue_free (r->queue);
97 resample_buffer_free (AudioresampleBuffer * buffer, void *priv)
100 ((void (*)(void *)) buffer->priv2) (buffer->priv);
105 resample_add_input_data (ResampleState * r, void *data, int size,
106 void (*free_func) (void *), void *closure)
108 AudioresampleBuffer *buffer;
110 RESAMPLE_DEBUG ("data %p size %d", data, size);
112 buffer = audioresample_buffer_new_with_data (data, size);
113 buffer->free = resample_buffer_free;
114 buffer->priv2 = free_func;
115 buffer->priv = closure;
117 audioresample_buffer_queue_push (r->queue, buffer);
121 resample_input_eos (ResampleState * r)
123 AudioresampleBuffer *buffer;
126 sample_size = r->n_channels * resample_format_size (r->format);
128 buffer = audioresample_buffer_new_and_alloc (sample_size *
129 (r->filter_length / 2));
130 memset (buffer->data, 0, buffer->length);
132 audioresample_buffer_queue_push (r->queue, buffer);
138 resample_get_output_size (ResampleState * r)
140 return floor (audioresample_buffer_queue_get_depth (r->queue) * r->o_rate /
145 resample_get_output_data (ResampleState * r, void *data, int size)
152 resample_scale_ref (r);
155 resample_scale_functable (r);
161 return size - r->o_size;
165 resample_set_filter_length (ResampleState * r, int length)
167 r->filter_length = length;
172 resample_set_input_rate (ResampleState * r, double rate)
179 resample_set_output_rate (ResampleState * r, double rate)
186 resample_set_n_channels (ResampleState * r, int n_channels)
188 r->n_channels = n_channels;
193 resample_set_format (ResampleState * r, ResampleFormat format)
200 resample_set_method (ResampleState * r, int method)
207 resample_format_size (ResampleFormat format)
210 case RESAMPLE_FORMAT_S16:
212 case RESAMPLE_FORMAT_S32:
213 case RESAMPLE_FORMAT_F32:
215 case RESAMPLE_FORMAT_F64: