xref: /openbmc/qemu/audio/mixeng.h (revision ed75658a)
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 
25 #ifndef QEMU_MIXENG_H
26 #define QEMU_MIXENG_H
27 
28 #ifdef FLOAT_MIXENG
29 typedef float mixeng_real;
30 struct mixeng_volume { int mute; mixeng_real r; mixeng_real l; };
31 struct st_sample { mixeng_real l; mixeng_real r; };
32 #else
33 struct mixeng_volume { int mute; int64_t r; int64_t l; };
34 struct st_sample { int64_t l; int64_t r; };
35 #endif
36 typedef struct st_sample st_sample;
37 
38 typedef void (t_sample) (struct st_sample *dst, const void *src, int samples);
39 typedef void (f_sample) (void *dst, const struct st_sample *src, int samples);
40 
41 /* indices: [stereo][signed][swap endianness][8, 16 or 32-bits] */
42 extern t_sample *mixeng_conv[2][2][2][3];
43 extern f_sample *mixeng_clip[2][2][2][3];
44 
45 /* indices: [stereo] */
46 extern t_sample *mixeng_conv_float[2];
47 extern f_sample *mixeng_clip_float[2];
48 
49 void *st_rate_start (int inrate, int outrate);
50 void st_rate_flow(void *opaque, st_sample *ibuf, st_sample *obuf,
51                   size_t *isamp, size_t *osamp);
52 void st_rate_flow_mix(void *opaque, st_sample *ibuf, st_sample *obuf,
53                       size_t *isamp, size_t *osamp);
54 void st_rate_stop (void *opaque);
55 uint32_t st_rate_frames_out(void *opaque, uint32_t frames_in);
56 uint32_t st_rate_frames_in(void *opaque, uint32_t frames_out);
57 void mixeng_clear (struct st_sample *buf, int len);
58 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol);
59 
60 #endif /* QEMU_MIXENG_H */
61