ide: cmd646 ->unit has just the value that we want
[qemu.git] / audio / mixeng.c
blob8ce942e49be423e8d7a90618be1a845deb821063
1 /*
2 * QEMU Mixing engine
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
23 * THE SOFTWARE.
25 #include "qemu-common.h"
26 #include "audio.h"
28 #define AUDIO_CAP "mixeng"
29 #include "audio_int.h"
31 /* 8 bit */
32 #define ENDIAN_CONVERSION natural
33 #define ENDIAN_CONVERT(v) (v)
35 /* Signed 8 bit */
36 #define IN_T int8_t
37 #define IN_MIN SCHAR_MIN
38 #define IN_MAX SCHAR_MAX
39 #define SIGNED
40 #define SHIFT 8
41 #include "mixeng_template.h"
42 #undef SIGNED
43 #undef IN_MAX
44 #undef IN_MIN
45 #undef IN_T
46 #undef SHIFT
48 /* Unsigned 8 bit */
49 #define IN_T uint8_t
50 #define IN_MIN 0
51 #define IN_MAX UCHAR_MAX
52 #define SHIFT 8
53 #include "mixeng_template.h"
54 #undef IN_MAX
55 #undef IN_MIN
56 #undef IN_T
57 #undef SHIFT
59 #undef ENDIAN_CONVERT
60 #undef ENDIAN_CONVERSION
62 /* Signed 16 bit */
63 #define IN_T int16_t
64 #define IN_MIN SHRT_MIN
65 #define IN_MAX SHRT_MAX
66 #define SIGNED
67 #define SHIFT 16
68 #define ENDIAN_CONVERSION natural
69 #define ENDIAN_CONVERT(v) (v)
70 #include "mixeng_template.h"
71 #undef ENDIAN_CONVERT
72 #undef ENDIAN_CONVERSION
73 #define ENDIAN_CONVERSION swap
74 #define ENDIAN_CONVERT(v) bswap16 (v)
75 #include "mixeng_template.h"
76 #undef ENDIAN_CONVERT
77 #undef ENDIAN_CONVERSION
78 #undef SIGNED
79 #undef IN_MAX
80 #undef IN_MIN
81 #undef IN_T
82 #undef SHIFT
84 /* Unsigned 16 bit */
85 #define IN_T uint16_t
86 #define IN_MIN 0
87 #define IN_MAX USHRT_MAX
88 #define SHIFT 16
89 #define ENDIAN_CONVERSION natural
90 #define ENDIAN_CONVERT(v) (v)
91 #include "mixeng_template.h"
92 #undef ENDIAN_CONVERT
93 #undef ENDIAN_CONVERSION
94 #define ENDIAN_CONVERSION swap
95 #define ENDIAN_CONVERT(v) bswap16 (v)
96 #include "mixeng_template.h"
97 #undef ENDIAN_CONVERT
98 #undef ENDIAN_CONVERSION
99 #undef IN_MAX
100 #undef IN_MIN
101 #undef IN_T
102 #undef SHIFT
104 /* Signed 32 bit */
105 #define IN_T int32_t
106 #define IN_MIN INT32_MIN
107 #define IN_MAX INT32_MAX
108 #define SIGNED
109 #define SHIFT 32
110 #define ENDIAN_CONVERSION natural
111 #define ENDIAN_CONVERT(v) (v)
112 #include "mixeng_template.h"
113 #undef ENDIAN_CONVERT
114 #undef ENDIAN_CONVERSION
115 #define ENDIAN_CONVERSION swap
116 #define ENDIAN_CONVERT(v) bswap32 (v)
117 #include "mixeng_template.h"
118 #undef ENDIAN_CONVERT
119 #undef ENDIAN_CONVERSION
120 #undef SIGNED
121 #undef IN_MAX
122 #undef IN_MIN
123 #undef IN_T
124 #undef SHIFT
126 /* Unsigned 16 bit */
127 #define IN_T uint32_t
128 #define IN_MIN 0
129 #define IN_MAX UINT32_MAX
130 #define SHIFT 32
131 #define ENDIAN_CONVERSION natural
132 #define ENDIAN_CONVERT(v) (v)
133 #include "mixeng_template.h"
134 #undef ENDIAN_CONVERT
135 #undef ENDIAN_CONVERSION
136 #define ENDIAN_CONVERSION swap
137 #define ENDIAN_CONVERT(v) bswap32 (v)
138 #include "mixeng_template.h"
139 #undef ENDIAN_CONVERT
140 #undef ENDIAN_CONVERSION
141 #undef IN_MAX
142 #undef IN_MIN
143 #undef IN_T
144 #undef SHIFT
146 t_sample *mixeng_conv[2][2][2][3] = {
150 conv_natural_uint8_t_to_mono,
151 conv_natural_uint16_t_to_mono,
152 conv_natural_uint32_t_to_mono
155 conv_natural_uint8_t_to_mono,
156 conv_swap_uint16_t_to_mono,
157 conv_swap_uint32_t_to_mono,
162 conv_natural_int8_t_to_mono,
163 conv_natural_int16_t_to_mono,
164 conv_natural_int32_t_to_mono
167 conv_natural_int8_t_to_mono,
168 conv_swap_int16_t_to_mono,
169 conv_swap_int32_t_to_mono
176 conv_natural_uint8_t_to_stereo,
177 conv_natural_uint16_t_to_stereo,
178 conv_natural_uint32_t_to_stereo
181 conv_natural_uint8_t_to_stereo,
182 conv_swap_uint16_t_to_stereo,
183 conv_swap_uint32_t_to_stereo
188 conv_natural_int8_t_to_stereo,
189 conv_natural_int16_t_to_stereo,
190 conv_natural_int32_t_to_stereo
193 conv_natural_int8_t_to_stereo,
194 conv_swap_int16_t_to_stereo,
195 conv_swap_int32_t_to_stereo,
201 f_sample *mixeng_clip[2][2][2][3] = {
205 clip_natural_uint8_t_from_mono,
206 clip_natural_uint16_t_from_mono,
207 clip_natural_uint32_t_from_mono
210 clip_natural_uint8_t_from_mono,
211 clip_swap_uint16_t_from_mono,
212 clip_swap_uint32_t_from_mono
217 clip_natural_int8_t_from_mono,
218 clip_natural_int16_t_from_mono,
219 clip_natural_int32_t_from_mono
222 clip_natural_int8_t_from_mono,
223 clip_swap_int16_t_from_mono,
224 clip_swap_int32_t_from_mono
231 clip_natural_uint8_t_from_stereo,
232 clip_natural_uint16_t_from_stereo,
233 clip_natural_uint32_t_from_stereo
236 clip_natural_uint8_t_from_stereo,
237 clip_swap_uint16_t_from_stereo,
238 clip_swap_uint32_t_from_stereo
243 clip_natural_int8_t_from_stereo,
244 clip_natural_int16_t_from_stereo,
245 clip_natural_int32_t_from_stereo
248 clip_natural_int8_t_from_stereo,
249 clip_swap_int16_t_from_stereo,
250 clip_swap_int32_t_from_stereo
257 * August 21, 1998
258 * Copyright 1998 Fabrice Bellard.
260 * [Rewrote completly the code of Lance Norskog And Sundry
261 * Contributors with a more efficient algorithm.]
263 * This source code is freely redistributable and may be used for
264 * any purpose. This copyright notice must be maintained.
265 * Lance Norskog And Sundry Contributors are not responsible for
266 * the consequences of using this software.
270 * Sound Tools rate change effect file.
273 * Linear Interpolation.
275 * The use of fractional increment allows us to use no buffer. It
276 * avoid the problems at the end of the buffer we had with the old
277 * method which stored a possibly big buffer of size
278 * lcm(in_rate,out_rate).
280 * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
281 * the input & output frequencies are equal, a delay of one sample is
282 * introduced. Limited to processing 32-bit count worth of samples.
284 * 1 << FRAC_BITS evaluating to zero in several places. Changed with
285 * an (unsigned long) cast to make it safe. MarkMLl 2/1/99
288 /* Private data */
289 struct rate {
290 uint64_t opos;
291 uint64_t opos_inc;
292 uint32_t ipos; /* position in the input stream (integer) */
293 struct st_sample ilast; /* last sample in the input stream */
297 * Prepare processing.
299 void *st_rate_start (int inrate, int outrate)
301 struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
303 if (!rate) {
304 dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
305 return NULL;
308 rate->opos = 0;
310 /* increment */
311 rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
313 rate->ipos = 0;
314 rate->ilast.l = 0;
315 rate->ilast.r = 0;
316 return rate;
319 #define NAME st_rate_flow_mix
320 #define OP(a, b) a += b
321 #include "rate_template.h"
323 #define NAME st_rate_flow
324 #define OP(a, b) a = b
325 #include "rate_template.h"
327 void st_rate_stop (void *opaque)
329 qemu_free (opaque);
332 void mixeng_clear (struct st_sample *buf, int len)
334 memset (buf, 0, len * sizeof (struct st_sample));