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Commit | Line | Data |
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7372f88d | 1 | /* |
1d14ffa9 FB |
2 | * QEMU Timer based audio emulation |
3 | * | |
4 | * Copyright (c) 2004-2005 Vassili Karpov (malc) | |
5 | * | |
7372f88d FB |
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 | */ | |
6086a565 | 24 | #include "qemu/osdep.h" |
87ecb68b PB |
25 | #include "qemu-common.h" |
26 | #include "audio.h" | |
1de7afc9 | 27 | #include "qemu/timer.h" |
7372f88d | 28 | |
1d14ffa9 FB |
29 | #define AUDIO_CAP "noaudio" |
30 | #include "audio_int.h" | |
7372f88d | 31 | |
1d14ffa9 FB |
32 | typedef struct NoVoiceOut { |
33 | HWVoiceOut hw; | |
7372f88d | 34 | int64_t old_ticks; |
1d14ffa9 | 35 | } NoVoiceOut; |
7372f88d | 36 | |
1d14ffa9 FB |
37 | typedef struct NoVoiceIn { |
38 | HWVoiceIn hw; | |
39 | int64_t old_ticks; | |
40 | } NoVoiceIn; | |
7372f88d | 41 | |
bdff253c | 42 | static int no_run_out (HWVoiceOut *hw, int live) |
7372f88d | 43 | { |
1d14ffa9 | 44 | NoVoiceOut *no = (NoVoiceOut *) hw; |
bdff253c | 45 | int decr, samples; |
8ead62cf FB |
46 | int64_t now; |
47 | int64_t ticks; | |
48 | int64_t bytes; | |
7372f88d | 49 | |
bc72ad67 | 50 | now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
8ead62cf | 51 | ticks = now - no->old_ticks; |
73bcb24d RS |
52 | bytes = muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); |
53 | bytes = audio_MIN(bytes, INT_MAX); | |
8ead62cf FB |
54 | samples = bytes >> hw->info.shift; |
55 | ||
7372f88d FB |
56 | no->old_ticks = now; |
57 | decr = audio_MIN (live, samples); | |
1d14ffa9 FB |
58 | hw->rpos = (hw->rpos + decr) % hw->samples; |
59 | return decr; | |
60 | } | |
7372f88d | 61 | |
1d14ffa9 FB |
62 | static int no_write (SWVoiceOut *sw, void *buf, int len) |
63 | { | |
73bcb24d | 64 | return audio_pcm_sw_write(sw, buf, len); |
1d14ffa9 | 65 | } |
7372f88d | 66 | |
5706db1d | 67 | static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque) |
1d14ffa9 | 68 | { |
d929eba5 | 69 | audio_pcm_init_info (&hw->info, as); |
c0fe3827 | 70 | hw->samples = 1024; |
1d14ffa9 FB |
71 | return 0; |
72 | } | |
7372f88d | 73 | |
1d14ffa9 FB |
74 | static void no_fini_out (HWVoiceOut *hw) |
75 | { | |
76 | (void) hw; | |
7372f88d FB |
77 | } |
78 | ||
1d14ffa9 | 79 | static int no_ctl_out (HWVoiceOut *hw, int cmd, ...) |
7372f88d | 80 | { |
1d14ffa9 FB |
81 | (void) hw; |
82 | (void) cmd; | |
83 | return 0; | |
7372f88d FB |
84 | } |
85 | ||
5706db1d | 86 | static int no_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque) |
7372f88d | 87 | { |
d929eba5 | 88 | audio_pcm_init_info (&hw->info, as); |
c0fe3827 | 89 | hw->samples = 1024; |
7372f88d FB |
90 | return 0; |
91 | } | |
92 | ||
1d14ffa9 | 93 | static void no_fini_in (HWVoiceIn *hw) |
7372f88d FB |
94 | { |
95 | (void) hw; | |
96 | } | |
97 | ||
1d14ffa9 FB |
98 | static int no_run_in (HWVoiceIn *hw) |
99 | { | |
100 | NoVoiceIn *no = (NoVoiceIn *) hw; | |
1d14ffa9 FB |
101 | int live = audio_pcm_hw_get_live_in (hw); |
102 | int dead = hw->samples - live; | |
ec36b695 | 103 | int samples = 0; |
1d14ffa9 | 104 | |
8ead62cf | 105 | if (dead) { |
bc72ad67 | 106 | int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
8ead62cf | 107 | int64_t ticks = now - no->old_ticks; |
4f4cc0ef | 108 | int64_t bytes = |
73bcb24d | 109 | muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); |
1d14ffa9 | 110 | |
8ead62cf FB |
111 | no->old_ticks = now; |
112 | bytes = audio_MIN (bytes, INT_MAX); | |
113 | samples = bytes >> hw->info.shift; | |
114 | samples = audio_MIN (samples, dead); | |
115 | } | |
1d14ffa9 FB |
116 | return samples; |
117 | } | |
118 | ||
119 | static int no_read (SWVoiceIn *sw, void *buf, int size) | |
120 | { | |
8a7d0890 MW |
121 | /* use custom code here instead of audio_pcm_sw_read() to avoid |
122 | * useless resampling/mixing */ | |
1d14ffa9 FB |
123 | int samples = size >> sw->info.shift; |
124 | int total = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; | |
125 | int to_clear = audio_MIN (samples, total); | |
8a7d0890 | 126 | sw->total_hw_samples_acquired += total; |
1d14ffa9 | 127 | audio_pcm_info_clear_buf (&sw->info, buf, to_clear); |
85882c71 | 128 | return to_clear << sw->info.shift; |
1d14ffa9 FB |
129 | } |
130 | ||
131 | static int no_ctl_in (HWVoiceIn *hw, int cmd, ...) | |
7372f88d FB |
132 | { |
133 | (void) hw; | |
134 | (void) cmd; | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static void *no_audio_init (void) | |
139 | { | |
140 | return &no_audio_init; | |
141 | } | |
142 | ||
143 | static void no_audio_fini (void *opaque) | |
144 | { | |
1d14ffa9 | 145 | (void) opaque; |
7372f88d FB |
146 | } |
147 | ||
35f4b58c | 148 | static struct audio_pcm_ops no_pcm_ops = { |
1dd3e4d1 JQ |
149 | .init_out = no_init_out, |
150 | .fini_out = no_fini_out, | |
151 | .run_out = no_run_out, | |
152 | .write = no_write, | |
153 | .ctl_out = no_ctl_out, | |
154 | ||
155 | .init_in = no_init_in, | |
156 | .fini_in = no_fini_in, | |
157 | .run_in = no_run_in, | |
158 | .read = no_read, | |
159 | .ctl_in = no_ctl_in | |
7372f88d FB |
160 | }; |
161 | ||
1d14ffa9 | 162 | struct audio_driver no_audio_driver = { |
bee37f32 JQ |
163 | .name = "none", |
164 | .descr = "Timer based audio emulation", | |
165 | .options = NULL, | |
166 | .init = no_audio_init, | |
167 | .fini = no_audio_fini, | |
168 | .pcm_ops = &no_pcm_ops, | |
169 | .can_be_default = 1, | |
170 | .max_voices_out = INT_MAX, | |
171 | .max_voices_in = INT_MAX, | |
172 | .voice_size_out = sizeof (NoVoiceOut), | |
173 | .voice_size_in = sizeof (NoVoiceIn) | |
7372f88d | 174 | }; |