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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