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 "audio.h"
26
27 #define AUDIO_CAP "mixeng"
28 #include "audio_int.h"
29
30 #define NOVOL
31
32 /* 8 bit */
33 #define ENDIAN_CONVERSION natural
34 #define ENDIAN_CONVERT(v) (v)
35
36 /* Signed 8 bit */
37 #define IN_T int8_t
38 #define IN_MIN SCHAR_MIN
39 #define IN_MAX SCHAR_MAX
40 #define SIGNED
41 #define SHIFT 8
42 #include "mixeng_template.h"
43 #undef SIGNED
44 #undef IN_MAX
45 #undef IN_MIN
46 #undef IN_T
47 #undef SHIFT
48
49 /* Unsigned 8 bit */
50 #define IN_T uint8_t
51 #define IN_MIN 0
52 #define IN_MAX UCHAR_MAX
53 #define SHIFT 8
54 #include "mixeng_template.h"
55 #undef IN_MAX
56 #undef IN_MIN
57 #undef IN_T
58 #undef SHIFT
59
60 #undef ENDIAN_CONVERT
61 #undef ENDIAN_CONVERSION
62
63 /* Signed 16 bit */
64 #define IN_T int16_t
65 #define IN_MIN SHRT_MIN
66 #define IN_MAX SHRT_MAX
67 #define SIGNED
68 #define SHIFT 16
69 #define ENDIAN_CONVERSION natural
70 #define ENDIAN_CONVERT(v) (v)
71 #include "mixeng_template.h"
72 #undef ENDIAN_CONVERT
73 #undef ENDIAN_CONVERSION
74 #define ENDIAN_CONVERSION swap
75 #define ENDIAN_CONVERT(v) bswap16 (v)
76 #include "mixeng_template.h"
77 #undef ENDIAN_CONVERT
78 #undef ENDIAN_CONVERSION
79 #undef SIGNED
80 #undef IN_MAX
81 #undef IN_MIN
82 #undef IN_T
83 #undef SHIFT
84
85 /* Unsigned 16 bit */
86 #define IN_T uint16_t
87 #define IN_MIN 0
88 #define IN_MAX USHRT_MAX
89 #define SHIFT 16
90 #define ENDIAN_CONVERSION natural
91 #define ENDIAN_CONVERT(v) (v)
92 #include "mixeng_template.h"
93 #undef ENDIAN_CONVERT
94 #undef ENDIAN_CONVERSION
95 #define ENDIAN_CONVERSION swap
96 #define ENDIAN_CONVERT(v) bswap16 (v)
97 #include "mixeng_template.h"
98 #undef ENDIAN_CONVERT
99 #undef ENDIAN_CONVERSION
100 #undef IN_MAX
101 #undef IN_MIN
102 #undef IN_T
103 #undef SHIFT
104
105 /* Signed 32 bit */
106 #define IN_T int32_t
107 #define IN_MIN INT32_MIN
108 #define IN_MAX INT32_MAX
109 #define SIGNED
110 #define SHIFT 32
111 #define ENDIAN_CONVERSION natural
112 #define ENDIAN_CONVERT(v) (v)
113 #include "mixeng_template.h"
114 #undef ENDIAN_CONVERT
115 #undef ENDIAN_CONVERSION
116 #define ENDIAN_CONVERSION swap
117 #define ENDIAN_CONVERT(v) bswap32 (v)
118 #include "mixeng_template.h"
119 #undef ENDIAN_CONVERT
120 #undef ENDIAN_CONVERSION
121 #undef SIGNED
122 #undef IN_MAX
123 #undef IN_MIN
124 #undef IN_T
125 #undef SHIFT
126
127 /* Unsigned 16 bit */
128 #define IN_T uint32_t
129 #define IN_MIN 0
130 #define IN_MAX UINT32_MAX
131 #define SHIFT 32
132 #define ENDIAN_CONVERSION natural
133 #define ENDIAN_CONVERT(v) (v)
134 #include "mixeng_template.h"
135 #undef ENDIAN_CONVERT
136 #undef ENDIAN_CONVERSION
137 #define ENDIAN_CONVERSION swap
138 #define ENDIAN_CONVERT(v) bswap32 (v)
139 #include "mixeng_template.h"
140 #undef ENDIAN_CONVERT
141 #undef ENDIAN_CONVERSION
142 #undef IN_MAX
143 #undef IN_MIN
144 #undef IN_T
145 #undef SHIFT
146
147 t_sample *mixeng_conv[2][2][2][3] = {
148 {
149 {
150 {
151 conv_natural_uint8_t_to_mono,
152 conv_natural_uint16_t_to_mono,
153 conv_natural_uint32_t_to_mono
154 },
155 {
156 conv_natural_uint8_t_to_mono,
157 conv_swap_uint16_t_to_mono,
158 conv_swap_uint32_t_to_mono,
159 }
160 },
161 {
162 {
163 conv_natural_int8_t_to_mono,
164 conv_natural_int16_t_to_mono,
165 conv_natural_int32_t_to_mono
166 },
167 {
168 conv_natural_int8_t_to_mono,
169 conv_swap_int16_t_to_mono,
170 conv_swap_int32_t_to_mono
171 }
172 }
173 },
174 {
175 {
176 {
177 conv_natural_uint8_t_to_stereo,
178 conv_natural_uint16_t_to_stereo,
179 conv_natural_uint32_t_to_stereo
180 },
181 {
182 conv_natural_uint8_t_to_stereo,
183 conv_swap_uint16_t_to_stereo,
184 conv_swap_uint32_t_to_stereo
185 }
186 },
187 {
188 {
189 conv_natural_int8_t_to_stereo,
190 conv_natural_int16_t_to_stereo,
191 conv_natural_int32_t_to_stereo
192 },
193 {
194 conv_natural_int8_t_to_stereo,
195 conv_swap_int16_t_to_stereo,
196 conv_swap_int32_t_to_stereo,
197 }
198 }
199 }
200 };
201
202 f_sample *mixeng_clip[2][2][2][3] = {
203 {
204 {
205 {
206 clip_natural_uint8_t_from_mono,
207 clip_natural_uint16_t_from_mono,
208 clip_natural_uint32_t_from_mono
209 },
210 {
211 clip_natural_uint8_t_from_mono,
212 clip_swap_uint16_t_from_mono,
213 clip_swap_uint32_t_from_mono
214 }
215 },
216 {
217 {
218 clip_natural_int8_t_from_mono,
219 clip_natural_int16_t_from_mono,
220 clip_natural_int32_t_from_mono
221 },
222 {
223 clip_natural_int8_t_from_mono,
224 clip_swap_int16_t_from_mono,
225 clip_swap_int32_t_from_mono
226 }
227 }
228 },
229 {
230 {
231 {
232 clip_natural_uint8_t_from_stereo,
233 clip_natural_uint16_t_from_stereo,
234 clip_natural_uint32_t_from_stereo
235 },
236 {
237 clip_natural_uint8_t_from_stereo,
238 clip_swap_uint16_t_from_stereo,
239 clip_swap_uint32_t_from_stereo
240 }
241 },
242 {
243 {
244 clip_natural_int8_t_from_stereo,
245 clip_natural_int16_t_from_stereo,
246 clip_natural_int32_t_from_stereo
247 },
248 {
249 clip_natural_int8_t_from_stereo,
250 clip_swap_int16_t_from_stereo,
251 clip_swap_int32_t_from_stereo
252 }
253 }
254 }
255 };
256
257 /*
258 * August 21, 1998
259 * Copyright 1998 Fabrice Bellard.
260 *
261 * [Rewrote completly the code of Lance Norskog And Sundry
262 * Contributors with a more efficient algorithm.]
263 *
264 * This source code is freely redistributable and may be used for
265 * any purpose. This copyright notice must be maintained.
266 * Lance Norskog And Sundry Contributors are not responsible for
267 * the consequences of using this software.
268 */
269
270 /*
271 * Sound Tools rate change effect file.
272 */
273 /*
274 * Linear Interpolation.
275 *
276 * The use of fractional increment allows us to use no buffer. It
277 * avoid the problems at the end of the buffer we had with the old
278 * method which stored a possibly big buffer of size
279 * lcm(in_rate,out_rate).
280 *
281 * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
282 * the input & output frequencies are equal, a delay of one sample is
283 * introduced. Limited to processing 32-bit count worth of samples.
284 *
285 * 1 << FRAC_BITS evaluating to zero in several places. Changed with
286 * an (unsigned long) cast to make it safe. MarkMLl 2/1/99
287 */
288
289 /* Private data */
290 struct rate {
291 uint64_t opos;
292 uint64_t opos_inc;
293 uint32_t ipos; /* position in the input stream (integer) */
294 st_sample_t ilast; /* last sample in the input stream */
295 };
296
297 /*
298 * Prepare processing.
299 */
st_rate_start(int inrate,int outrate)300 void *st_rate_start (int inrate, int outrate)
301 {
302 struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
303
304 if (!rate) {
305 dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
306 return NULL;
307 }
308
309 rate->opos = 0;
310
311 /* increment */
312 rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
313
314 rate->ipos = 0;
315 rate->ilast.l = 0;
316 rate->ilast.r = 0;
317 return rate;
318 }
319
320 #define NAME st_rate_flow_mix
321 #define OP(a, b) a += b
322 #include "rate_template.h"
323
324 #define NAME st_rate_flow
325 #define OP(a, b) a = b
326 #include "rate_template.h"
327
st_rate_stop(void * opaque)328 void st_rate_stop (void *opaque)
329 {
330 qemu_free (opaque);
331 }
332
mixeng_clear(st_sample_t * buf,int len)333 void mixeng_clear (st_sample_t *buf, int len)
334 {
335 memset (buf, 0, len * sizeof (st_sample_t));
336 }
337