4 * Copyright (c) 2004-2005 Vassili Karpov (malc)
5 * Copyright (c) 1998 Fabrice Bellard
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 #define AUDIO_CAP "mixeng"
28 #include "audio_int.h"
33 #define ENDIAN_CONVERSION natural
34 #define ENDIAN_CONVERT(v) (v)
38 #define IN_MIN SCHAR_MIN
39 #define IN_MAX SCHAR_MAX
42 #include "mixeng_template.h"
52 #define IN_MAX UCHAR_MAX
54 #include "mixeng_template.h"
61 #undef ENDIAN_CONVERSION
65 #define IN_MIN SHRT_MIN
66 #define IN_MAX SHRT_MAX
69 #define ENDIAN_CONVERSION natural
70 #define ENDIAN_CONVERT(v) (v)
71 #include "mixeng_template.h"
73 #undef ENDIAN_CONVERSION
74 #define ENDIAN_CONVERSION swap
75 #define ENDIAN_CONVERT(v) bswap16 (v)
76 #include "mixeng_template.h"
78 #undef ENDIAN_CONVERSION
87 #define IN_MAX USHRT_MAX
89 #define ENDIAN_CONVERSION natural
90 #define ENDIAN_CONVERT(v) (v)
91 #include "mixeng_template.h"
93 #undef ENDIAN_CONVERSION
94 #define ENDIAN_CONVERSION swap
95 #define ENDIAN_CONVERT(v) bswap16 (v)
96 #include "mixeng_template.h"
98 #undef ENDIAN_CONVERSION
104 t_sample *mixeng_conv[2][2][2][2] = {
108 conv_natural_uint8_t_to_mono,
109 conv_natural_uint16_t_to_mono
112 conv_natural_uint8_t_to_mono,
113 conv_swap_uint16_t_to_mono
118 conv_natural_int8_t_to_mono,
119 conv_natural_int16_t_to_mono
122 conv_natural_int8_t_to_mono,
123 conv_swap_int16_t_to_mono
130 conv_natural_uint8_t_to_stereo,
131 conv_natural_uint16_t_to_stereo
134 conv_natural_uint8_t_to_stereo,
135 conv_swap_uint16_t_to_stereo
140 conv_natural_int8_t_to_stereo,
141 conv_natural_int16_t_to_stereo
144 conv_natural_int8_t_to_stereo,
145 conv_swap_int16_t_to_stereo
151 f_sample *mixeng_clip[2][2][2][2] = {
155 clip_natural_uint8_t_from_mono,
156 clip_natural_uint16_t_from_mono
159 clip_natural_uint8_t_from_mono,
160 clip_swap_uint16_t_from_mono
165 clip_natural_int8_t_from_mono,
166 clip_natural_int16_t_from_mono
169 clip_natural_int8_t_from_mono,
170 clip_swap_int16_t_from_mono
177 clip_natural_uint8_t_from_stereo,
178 clip_natural_uint16_t_from_stereo
181 clip_natural_uint8_t_from_stereo,
182 clip_swap_uint16_t_from_stereo
187 clip_natural_int8_t_from_stereo,
188 clip_natural_int16_t_from_stereo
191 clip_natural_int8_t_from_stereo,
192 clip_swap_int16_t_from_stereo
200 * Copyright 1998 Fabrice Bellard.
202 * [Rewrote completly the code of Lance Norskog And Sundry
203 * Contributors with a more efficient algorithm.]
205 * This source code is freely redistributable and may be used for
206 * any purpose. This copyright notice must be maintained.
207 * Lance Norskog And Sundry Contributors are not responsible for
208 * the consequences of using this software.
212 * Sound Tools rate change effect file.
215 * Linear Interpolation.
217 * The use of fractional increment allows us to use no buffer. It
218 * avoid the problems at the end of the buffer we had with the old
219 * method which stored a possibly big buffer of size
220 * lcm(in_rate,out_rate).
222 * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
223 * the input & output frequencies are equal, a delay of one sample is
224 * introduced. Limited to processing 32-bit count worth of samples.
226 * 1 << FRAC_BITS evaluating to zero in several places. Changed with
227 * an (unsigned long) cast to make it safe. MarkMLl 2/1/99
234 uint32_t ipos; /* position in the input stream (integer) */
235 st_sample_t ilast; /* last sample in the input stream */
239 * Prepare processing.
241 void *st_rate_start (int inrate, int outrate)
243 struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
246 dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
253 rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
261 #define NAME st_rate_flow_mix
262 #define OP(a, b) a += b
263 #include "rate_template.h"
265 #define NAME st_rate_flow
266 #define OP(a, b) a = b
267 #include "rate_template.h"
269 void st_rate_stop (void *opaque)
274 void mixeng_clear (st_sample_t *buf, int len)
276 memset (buf, 0, len * sizeof (st_sample_t));