Merge remote-tracking branch 'remotes/stefanberger/tags/pull-tpm-2021-01-25-1' into...
[qemu.git] / audio / noaudio.c
1 /*
2 * QEMU Timer based audio emulation
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 #include "qemu/osdep.h"
26 #include "qemu/host-utils.h"
27 #include "qemu/module.h"
28 #include "audio.h"
29 #include "qemu/timer.h"
30
31 #define AUDIO_CAP "noaudio"
32 #include "audio_int.h"
33
34 typedef struct NoVoiceOut {
35 HWVoiceOut hw;
36 RateCtl rate;
37 } NoVoiceOut;
38
39 typedef struct NoVoiceIn {
40 HWVoiceIn hw;
41 RateCtl rate;
42 } NoVoiceIn;
43
44 static size_t no_write(HWVoiceOut *hw, void *buf, size_t len)
45 {
46 NoVoiceOut *no = (NoVoiceOut *) hw;
47 return audio_rate_get_bytes(&hw->info, &no->rate, len);
48 }
49
50 static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)
51 {
52 NoVoiceOut *no = (NoVoiceOut *) hw;
53
54 audio_pcm_init_info (&hw->info, as);
55 hw->samples = 1024;
56 audio_rate_start(&no->rate);
57 return 0;
58 }
59
60 static void no_fini_out (HWVoiceOut *hw)
61 {
62 (void) hw;
63 }
64
65 static void no_enable_out(HWVoiceOut *hw, bool enable)
66 {
67 NoVoiceOut *no = (NoVoiceOut *) hw;
68
69 if (enable) {
70 audio_rate_start(&no->rate);
71 }
72 }
73
74 static int no_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
75 {
76 NoVoiceIn *no = (NoVoiceIn *) hw;
77
78 audio_pcm_init_info (&hw->info, as);
79 hw->samples = 1024;
80 audio_rate_start(&no->rate);
81 return 0;
82 }
83
84 static void no_fini_in (HWVoiceIn *hw)
85 {
86 (void) hw;
87 }
88
89 static size_t no_read(HWVoiceIn *hw, void *buf, size_t size)
90 {
91 NoVoiceIn *no = (NoVoiceIn *) hw;
92 int64_t bytes = audio_rate_get_bytes(&hw->info, &no->rate, size);
93
94 audio_pcm_info_clear_buf(&hw->info, buf, bytes / hw->info.bytes_per_frame);
95 return bytes;
96 }
97
98 static void no_enable_in(HWVoiceIn *hw, bool enable)
99 {
100 NoVoiceIn *no = (NoVoiceIn *) hw;
101
102 if (enable) {
103 audio_rate_start(&no->rate);
104 }
105 }
106
107 static void *no_audio_init(Audiodev *dev)
108 {
109 return &no_audio_init;
110 }
111
112 static void no_audio_fini (void *opaque)
113 {
114 (void) opaque;
115 }
116
117 static struct audio_pcm_ops no_pcm_ops = {
118 .init_out = no_init_out,
119 .fini_out = no_fini_out,
120 .write = no_write,
121 .run_buffer_out = audio_generic_run_buffer_out,
122 .enable_out = no_enable_out,
123
124 .init_in = no_init_in,
125 .fini_in = no_fini_in,
126 .read = no_read,
127 .run_buffer_in = audio_generic_run_buffer_in,
128 .enable_in = no_enable_in
129 };
130
131 static struct audio_driver no_audio_driver = {
132 .name = "none",
133 .descr = "Timer based audio emulation",
134 .init = no_audio_init,
135 .fini = no_audio_fini,
136 .pcm_ops = &no_pcm_ops,
137 .can_be_default = 1,
138 .max_voices_out = INT_MAX,
139 .max_voices_in = INT_MAX,
140 .voice_size_out = sizeof (NoVoiceOut),
141 .voice_size_in = sizeof (NoVoiceIn)
142 };
143
144 static void register_audio_none(void)
145 {
146 audio_driver_register(&no_audio_driver);
147 }
148 type_init(register_audio_none);