jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * QEMU Audio subsystem header
3 *
4 * Copyright (c) 2003-2005 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_AUDIO_INT_H
26#define QEMU_AUDIO_INT_H
27
28#ifdef CONFIG_AUDIO_COREAUDIO
29#define FLOAT_MIXENG
30/* #define RECIPROCAL */
31#endif
32#include "mixeng.h"
33
34struct audio_pcm_ops;
35
36struct audio_callback {
37 void *opaque;
38 audio_callback_fn fn;
39};
40
41struct audio_pcm_info {
42 int bits;
43 bool is_signed;
44 bool is_float;
45 int freq;
46 int nchannels;
47 int bytes_per_frame;
48 int bytes_per_second;
49 int swap_endianness;
50};
51
52typedef struct AudioState AudioState;
53typedef struct SWVoiceCap SWVoiceCap;
54
55typedef struct STSampleBuffer {
56 size_t pos, size;
57 st_sample samples[];
58} STSampleBuffer;
59
60typedef struct HWVoiceOut {
61 AudioState *s;
62 int enabled;
63 int poll_mode;
64 int pending_disable;
65 struct audio_pcm_info info;
66
67 f_sample *clip;
68 uint64_t ts_helper;
69
70 STSampleBuffer *mix_buf;
71 void *buf_emul;
72 size_t pos_emul, pending_emul, size_emul;
73
74 size_t samples;
75 QLIST_HEAD (sw_out_listhead, SWVoiceOut) sw_head;
76 QLIST_HEAD (sw_cap_listhead, SWVoiceCap) cap_head;
77 struct audio_pcm_ops *pcm_ops;
78 QLIST_ENTRY (HWVoiceOut) entries;
79} HWVoiceOut;
80
81typedef struct HWVoiceIn {
82 AudioState *s;
83 int enabled;
84 int poll_mode;
85 struct audio_pcm_info info;
86
87 t_sample *conv;
88
89 size_t total_samples_captured;
90 uint64_t ts_helper;
91
92 STSampleBuffer *conv_buf;
93 void *buf_emul;
94 size_t pos_emul, pending_emul, size_emul;
95
96 size_t samples;
97 QLIST_HEAD (sw_in_listhead, SWVoiceIn) sw_head;
98 struct audio_pcm_ops *pcm_ops;
99 QLIST_ENTRY (HWVoiceIn) entries;
100} HWVoiceIn;
101
102struct SWVoiceOut {
103 QEMUSoundCard *card;
104 AudioState *s;
105 struct audio_pcm_info info;
106 t_sample *conv;
107 int64_t ratio;
108 struct st_sample *buf;
109 void *rate;
110 size_t total_hw_samples_mixed;
111 int active;
112 int empty;
113 HWVoiceOut *hw;
114 char *name;
115 struct mixeng_volume vol;
116 struct audio_callback callback;
117 QLIST_ENTRY (SWVoiceOut) entries;
118};
119
120struct SWVoiceIn {
121 QEMUSoundCard *card;
122 AudioState *s;
123 int active;
124 struct audio_pcm_info info;
125 int64_t ratio;
126 void *rate;
127 size_t total_hw_samples_acquired;
128 struct st_sample *buf;
129 f_sample *clip;
130 HWVoiceIn *hw;
131 char *name;
132 struct mixeng_volume vol;
133 struct audio_callback callback;
134 QLIST_ENTRY (SWVoiceIn) entries;
135};
136
137typedef struct audio_driver audio_driver;
138struct audio_driver {
139 const char *name;
140 const char *descr;
141 void *(*init) (Audiodev *);
142 void (*fini) (void *);
143 struct audio_pcm_ops *pcm_ops;
144 int can_be_default;
145 int max_voices_out;
146 int max_voices_in;
147 int voice_size_out;
148 int voice_size_in;
149 QLIST_ENTRY(audio_driver) next;
150};
151
152struct audio_pcm_ops {
153 int (*init_out)(HWVoiceOut *hw, audsettings *as, void *drv_opaque);
154 void (*fini_out)(HWVoiceOut *hw);
155 size_t (*write) (HWVoiceOut *hw, void *buf, size_t size);
156 void (*run_buffer_out)(HWVoiceOut *hw);
157 /*
158 * get a buffer that after later can be passed to put_buffer_out; optional
159 * returns the buffer, and writes it's size to size (in bytes)
160 * this is unrelated to the above buffer_size_out function
161 */
162 void *(*get_buffer_out)(HWVoiceOut *hw, size_t *size);
163 /*
164 * put back the buffer returned by get_buffer_out; optional
165 * buf must be equal the pointer returned by get_buffer_out,
166 * size may be smaller
167 */
168 size_t (*put_buffer_out)(HWVoiceOut *hw, void *buf, size_t size);
169 void (*enable_out)(HWVoiceOut *hw, bool enable);
170 void (*volume_out)(HWVoiceOut *hw, Volume *vol);
171
172 int (*init_in) (HWVoiceIn *hw, audsettings *as, void *drv_opaque);
173 void (*fini_in) (HWVoiceIn *hw);
174 size_t (*read) (HWVoiceIn *hw, void *buf, size_t size);
175 void *(*get_buffer_in)(HWVoiceIn *hw, size_t *size);
176 void (*put_buffer_in)(HWVoiceIn *hw, void *buf, size_t size);
177 void (*enable_in)(HWVoiceIn *hw, bool enable);
178 void (*volume_in)(HWVoiceIn *hw, Volume *vol);
179};
180
181void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size);
182void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size);
183void audio_generic_run_buffer_out(HWVoiceOut *hw);
184void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size);
185size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size);
186size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size);
187size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size);
188
189struct capture_callback {
190 struct audio_capture_ops ops;
191 void *opaque;
192 QLIST_ENTRY (capture_callback) entries;
193};
194
195struct CaptureVoiceOut {
196 HWVoiceOut hw;
197 void *buf;
198 QLIST_HEAD (cb_listhead, capture_callback) cb_head;
199 QLIST_ENTRY (CaptureVoiceOut) entries;
200};
201
202struct SWVoiceCap {
203 SWVoiceOut sw;
204 CaptureVoiceOut *cap;
205 QLIST_ENTRY (SWVoiceCap) entries;
206};
207
208typedef struct AudioState {
209 struct audio_driver *drv;
210 Audiodev *dev;
211 void *drv_opaque;
212
213 QEMUTimer *ts;
214 QLIST_HEAD (card_listhead, QEMUSoundCard) card_head;
215 QLIST_HEAD (hw_in_listhead, HWVoiceIn) hw_head_in;
216 QLIST_HEAD (hw_out_listhead, HWVoiceOut) hw_head_out;
217 QLIST_HEAD (cap_listhead, CaptureVoiceOut) cap_head;
218 int nb_hw_voices_out;
219 int nb_hw_voices_in;
220 int vm_running;
221 int64_t period_ticks;
222
223 bool timer_running;
224 uint64_t timer_last;
225
226 QTAILQ_ENTRY(AudioState) list;
227} AudioState;
228
229extern const struct mixeng_volume nominal_volume;
230
231extern const char *audio_prio_list[];
232
233void audio_driver_register(audio_driver *drv);
234audio_driver *audio_driver_lookup(const char *name);
235
236void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as);
237void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len);
238
239int audio_bug (const char *funcname, int cond);
240void *audio_calloc (const char *funcname, int nmemb, size_t size);
241
242void audio_run(AudioState *s, const char *msg);
243
244typedef struct RateCtl {
245 int64_t start_ticks;
246 int64_t bytes_sent;
247} RateCtl;
248
249void audio_rate_start(RateCtl *rate);
250size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate,
251 size_t bytes_avail);
252
253static inline size_t audio_ring_dist(size_t dst, size_t src, size_t len)
254{
255 return (dst >= src) ? (dst - src) : (len - src + dst);
256}
257
258#define dolog(fmt, ...) AUD_log(AUDIO_CAP, fmt, ## __VA_ARGS__)
259
260#ifdef DEBUG
261#define ldebug(fmt, ...) AUD_log(AUDIO_CAP, fmt, ## __VA_ARGS__)
262#else
263#define ldebug(fmt, ...) (void)0
264#endif
265
266#define AUDIO_STRINGIFY_(n) #n
267#define AUDIO_STRINGIFY(n) AUDIO_STRINGIFY_(n)
268
269typedef struct AudiodevListEntry {
270 Audiodev *dev;
271 QSIMPLEQ_ENTRY(AudiodevListEntry) next;
272} AudiodevListEntry;
273
274typedef QSIMPLEQ_HEAD(, AudiodevListEntry) AudiodevListHead;
275AudiodevListHead audio_handle_legacy_opts(void);
276
277void audio_free_audiodev_list(AudiodevListHead *head);
278
279void audio_create_pdos(Audiodev *dev);
280AudiodevPerDirectionOptions *audio_get_pdo_in(Audiodev *dev);
281AudiodevPerDirectionOptions *audio_get_pdo_out(Audiodev *dev);
282
283#endif /* QEMU_AUDIO_INT_H */