1 /*
2 * QEMU Mixing engine
3 *
4 * Copyright (c) 2004-2005 Vassili Karpov (malc)
5 * Copyright (c) 1998 Fabrice Bellard
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
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.
24 */
25 #include "qemu-common.h"
26 #include "audio.h"
27
28 #define AUDIO_CAP "mixeng"
29 #include "audio_int.h"
30
31 /* 8 bit */
32 #define ENDIAN_CONVERSION natural
33 #define ENDIAN_CONVERT(v) (v)
34
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
47
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
58
59 #undef ENDIAN_CONVERT
60 #undef ENDIAN_CONVERSION
61
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
83
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
103
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
125
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
145
146 t_sample *mixeng_conv[2][2][2][3] = {
147 {
148 {
149 {
150 conv_natural_uint8_t_to_mono,
151 conv_natural_uint16_t_to_mono,
152 conv_natural_uint32_t_to_mono
153 },
154 {
155 conv_natural_uint8_t_to_mono,
156 conv_swap_uint16_t_to_mono,
157 conv_swap_uint32_t_to_mono,
158 }
159 },
160 {
161 {
162 conv_natural_int8_t_to_mono,
163 conv_natural_int16_t_to_mono,
164 conv_natural_int32_t_to_mono
165 },
166 {
167 conv_natural_int8_t_to_mono,
168 conv_swap_int16_t_to_mono,
169 conv_swap_int32_t_to_mono
170 }
171 }
172 },
173 {
174 {
175 {
176 conv_natural_uint8_t_to_stereo,
177 conv_natural_uint16_t_to_stereo,
178 conv_natural_uint32_t_to_stereo
179 },
180 {
181 conv_natural_uint8_t_to_stereo,
182 conv_swap_uint16_t_to_stereo,
183 conv_swap_uint32_t_to_stereo
184 }
185 },
186 {
187 {
188 conv_natural_int8_t_to_stereo,
189 conv_natural_int16_t_to_stereo,
190 conv_natural_int32_t_to_stereo
191 },
192 {
193 conv_natural_int8_t_to_stereo,
194 conv_swap_int16_t_to_stereo,
195 conv_swap_int32_t_to_stereo,
196 }
197 }
198 }
199 };
200
201 f_sample *mixeng_clip[2][2][2][3] = {
202 {
203 {
204 {
205 clip_natural_uint8_t_from_mono,
206 clip_natural_uint16_t_from_mono,
207 clip_natural_uint32_t_from_mono
208 },
209 {
210 clip_natural_uint8_t_from_mono,
211 clip_swap_uint16_t_from_mono,
212 clip_swap_uint32_t_from_mono
213 }
214 },
215 {
216 {
217 clip_natural_int8_t_from_mono,
218 clip_natural_int16_t_from_mono,
219 clip_natural_int32_t_from_mono
220 },
221 {
222 clip_natural_int8_t_from_mono,
223 clip_swap_int16_t_from_mono,
224 clip_swap_int32_t_from_mono
225 }
226 }
227 },
228 {
229 {
230 {
231 clip_natural_uint8_t_from_stereo,
232 clip_natural_uint16_t_from_stereo,
233 clip_natural_uint32_t_from_stereo
234 },
235 {
236 clip_natural_uint8_t_from_stereo,
237 clip_swap_uint16_t_from_stereo,
238 clip_swap_uint32_t_from_stereo
239 }
240 },
241 {
242 {
243 clip_natural_int8_t_from_stereo,
244 clip_natural_int16_t_from_stereo,
245 clip_natural_int32_t_from_stereo
246 },
247 {
248 clip_natural_int8_t_from_stereo,
249 clip_swap_int16_t_from_stereo,
250 clip_swap_int32_t_from_stereo
251 }
252 }
253 }
254 };
255
256 /*
257 * August 21, 1998
258 * Copyright 1998 Fabrice Bellard.
259 *
260 * [Rewrote completly the code of Lance Norskog And Sundry
261 * Contributors with a more efficient algorithm.]
262 *
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.
267 */
268
269 /*
270 * Sound Tools rate change effect file.
271 */
272 /*
273 * Linear Interpolation.
274 *
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).
279 *
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.
283 *
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
286 */
287
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 */
294 };
295
296 /*
297 * Prepare processing.
298 */
st_rate_start(int inrate,int outrate)299 void *st_rate_start (int inrate, int outrate)
300 {
301 struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
302
303 if (!rate) {
304 dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
305 return NULL;
306 }
307
308 rate->opos = 0;
309
310 /* increment */
311 rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
312
313 rate->ipos = 0;
314 rate->ilast.l = 0;
315 rate->ilast.r = 0;
316 return rate;
317 }
318
319 #define NAME st_rate_flow_mix
320 #define OP(a, b) a += b
321 #include "rate_template.h"
322
323 #define NAME st_rate_flow
324 #define OP(a, b) a = b
325 #include "rate_template.h"
326
st_rate_stop(void * opaque)327 void st_rate_stop (void *opaque)
328 {
329 qemu_free (opaque);
330 }
331
mixeng_clear(struct st_sample * buf,int len)332 void mixeng_clear (struct st_sample *buf, int len)
333 {
334 memset (buf, 0, len * sizeof (struct st_sample));
335 }
336