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1 /*
2  * QEMU Mixing engine header
3  *
4  * Copyright (c) 2004-2005 Vassili Karpov (malc)
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 #ifndef QEMU_MIXENG_H
25 #define QEMU_MIXENG_H
26 
27 #ifdef FLOAT_MIXENG
28 typedef float mixeng_real;
29 struct mixeng_volume { int mute; mixeng_real r; mixeng_real l; };
30 struct st_sample { mixeng_real l; mixeng_real r; };
31 #else
32 struct mixeng_volume { int mute; int64_t r; int64_t l; };
33 struct st_sample { int64_t l; int64_t r; };
34 #endif
35 
36 typedef void (t_sample) (struct st_sample *dst, const void *src,
37                          int samples, struct mixeng_volume *vol);
38 typedef void (f_sample) (void *dst, const struct st_sample *src, int samples);
39 
40 extern t_sample *mixeng_conv[2][2][2][3];
41 extern f_sample *mixeng_clip[2][2][2][3];
42 
43 void *st_rate_start (int inrate, int outrate);
44 void st_rate_flow (void *opaque, struct st_sample *ibuf, struct st_sample *obuf,
45                    int *isamp, int *osamp);
46 void st_rate_flow_mix (void *opaque, struct st_sample *ibuf, struct st_sample *obuf,
47                        int *isamp, int *osamp);
48 void st_rate_stop (void *opaque);
49 void mixeng_clear (struct st_sample *buf, int len);
50 
51 #endif  /* mixeng.h */
52