root / audio / spiceaudio.c @ 3e313753
History | View | Annotate | Download (8.3 kB)
1 |
#include "hw/hw.h" |
---|---|
2 |
#include "qemu-timer.h" |
3 |
#include "ui/qemu-spice.h" |
4 |
|
5 |
#define AUDIO_CAP "spice" |
6 |
#include "audio.h" |
7 |
#include "audio_int.h" |
8 |
|
9 |
#define LINE_IN_SAMPLES 1024 |
10 |
#define LINE_OUT_SAMPLES 1024 |
11 |
|
12 |
typedef struct SpiceRateCtl { |
13 |
int64_t start_ticks; |
14 |
int64_t bytes_sent; |
15 |
} SpiceRateCtl; |
16 |
|
17 |
typedef struct SpiceVoiceOut { |
18 |
HWVoiceOut hw; |
19 |
SpicePlaybackInstance sin; |
20 |
SpiceRateCtl rate; |
21 |
int active;
|
22 |
uint32_t *frame; |
23 |
uint32_t *fpos; |
24 |
uint32_t fsize; |
25 |
} SpiceVoiceOut; |
26 |
|
27 |
typedef struct SpiceVoiceIn { |
28 |
HWVoiceIn hw; |
29 |
SpiceRecordInstance sin; |
30 |
SpiceRateCtl rate; |
31 |
int active;
|
32 |
uint32_t samples[LINE_IN_SAMPLES]; |
33 |
} SpiceVoiceIn; |
34 |
|
35 |
static const SpicePlaybackInterface playback_sif = { |
36 |
.base.type = SPICE_INTERFACE_PLAYBACK, |
37 |
.base.description = "playback",
|
38 |
.base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR, |
39 |
.base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR, |
40 |
}; |
41 |
|
42 |
static const SpiceRecordInterface record_sif = { |
43 |
.base.type = SPICE_INTERFACE_RECORD, |
44 |
.base.description = "record",
|
45 |
.base.major_version = SPICE_INTERFACE_RECORD_MAJOR, |
46 |
.base.minor_version = SPICE_INTERFACE_RECORD_MINOR, |
47 |
}; |
48 |
|
49 |
static void *spice_audio_init (void) |
50 |
{ |
51 |
if (!using_spice) {
|
52 |
return NULL; |
53 |
} |
54 |
return &spice_audio_init;
|
55 |
} |
56 |
|
57 |
static void spice_audio_fini (void *opaque) |
58 |
{ |
59 |
/* nothing */
|
60 |
} |
61 |
|
62 |
static void rate_start (SpiceRateCtl *rate) |
63 |
{ |
64 |
memset (rate, 0, sizeof (*rate)); |
65 |
rate->start_ticks = qemu_get_clock (vm_clock); |
66 |
} |
67 |
|
68 |
static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate) |
69 |
{ |
70 |
int64_t now; |
71 |
int64_t ticks; |
72 |
int64_t bytes; |
73 |
int64_t samples; |
74 |
|
75 |
now = qemu_get_clock (vm_clock); |
76 |
ticks = now - rate->start_ticks; |
77 |
bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ()); |
78 |
samples = (bytes - rate->bytes_sent) >> info->shift; |
79 |
if (samples < 0 || samples > 65536) { |
80 |
fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", samples); |
81 |
rate_start (rate); |
82 |
samples = 0;
|
83 |
} |
84 |
rate->bytes_sent += samples << info->shift; |
85 |
return samples;
|
86 |
} |
87 |
|
88 |
/* playback */
|
89 |
|
90 |
static int line_out_init (HWVoiceOut *hw, struct audsettings *as) |
91 |
{ |
92 |
SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); |
93 |
struct audsettings settings;
|
94 |
|
95 |
settings.freq = SPICE_INTERFACE_PLAYBACK_FREQ; |
96 |
settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN; |
97 |
settings.fmt = AUD_FMT_S16; |
98 |
settings.endianness = AUDIO_HOST_ENDIANNESS; |
99 |
|
100 |
audio_pcm_init_info (&hw->info, &settings); |
101 |
hw->samples = LINE_OUT_SAMPLES; |
102 |
out->active = 0;
|
103 |
|
104 |
out->sin.base.sif = &playback_sif.base; |
105 |
qemu_spice_add_interface (&out->sin.base); |
106 |
return 0; |
107 |
} |
108 |
|
109 |
static void line_out_fini (HWVoiceOut *hw) |
110 |
{ |
111 |
SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); |
112 |
|
113 |
spice_server_remove_interface (&out->sin.base); |
114 |
} |
115 |
|
116 |
static int line_out_run (HWVoiceOut *hw, int live) |
117 |
{ |
118 |
SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); |
119 |
int rpos, decr;
|
120 |
int samples;
|
121 |
|
122 |
if (!live) {
|
123 |
return 0; |
124 |
} |
125 |
|
126 |
decr = rate_get_samples (&hw->info, &out->rate); |
127 |
decr = audio_MIN (live, decr); |
128 |
|
129 |
samples = decr; |
130 |
rpos = hw->rpos; |
131 |
while (samples) {
|
132 |
int left_till_end_samples = hw->samples - rpos;
|
133 |
int len = audio_MIN (samples, left_till_end_samples);
|
134 |
|
135 |
if (!out->frame) {
|
136 |
spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize); |
137 |
out->fpos = out->frame; |
138 |
} |
139 |
if (out->frame) {
|
140 |
len = audio_MIN (len, out->fsize); |
141 |
hw->clip (out->fpos, hw->mix_buf + rpos, len); |
142 |
out->fsize -= len; |
143 |
out->fpos += len; |
144 |
if (out->fsize == 0) { |
145 |
spice_server_playback_put_samples (&out->sin, out->frame); |
146 |
out->frame = out->fpos = NULL;
|
147 |
} |
148 |
} |
149 |
rpos = (rpos + len) % hw->samples; |
150 |
samples -= len; |
151 |
} |
152 |
hw->rpos = rpos; |
153 |
return decr;
|
154 |
} |
155 |
|
156 |
static int line_out_write (SWVoiceOut *sw, void *buf, int len) |
157 |
{ |
158 |
return audio_pcm_sw_write (sw, buf, len);
|
159 |
} |
160 |
|
161 |
static int line_out_ctl (HWVoiceOut *hw, int cmd, ...) |
162 |
{ |
163 |
SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); |
164 |
|
165 |
switch (cmd) {
|
166 |
case VOICE_ENABLE:
|
167 |
if (out->active) {
|
168 |
break;
|
169 |
} |
170 |
out->active = 1;
|
171 |
rate_start (&out->rate); |
172 |
spice_server_playback_start (&out->sin); |
173 |
break;
|
174 |
case VOICE_DISABLE:
|
175 |
if (!out->active) {
|
176 |
break;
|
177 |
} |
178 |
out->active = 0;
|
179 |
if (out->frame) {
|
180 |
memset (out->fpos, 0, out->fsize << 2); |
181 |
spice_server_playback_put_samples (&out->sin, out->frame); |
182 |
out->frame = out->fpos = NULL;
|
183 |
} |
184 |
spice_server_playback_stop (&out->sin); |
185 |
break;
|
186 |
} |
187 |
return 0; |
188 |
} |
189 |
|
190 |
/* record */
|
191 |
|
192 |
static int line_in_init (HWVoiceIn *hw, struct audsettings *as) |
193 |
{ |
194 |
SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
195 |
struct audsettings settings;
|
196 |
|
197 |
settings.freq = SPICE_INTERFACE_RECORD_FREQ; |
198 |
settings.nchannels = SPICE_INTERFACE_RECORD_CHAN; |
199 |
settings.fmt = AUD_FMT_S16; |
200 |
settings.endianness = AUDIO_HOST_ENDIANNESS; |
201 |
|
202 |
audio_pcm_init_info (&hw->info, &settings); |
203 |
hw->samples = LINE_IN_SAMPLES; |
204 |
in->active = 0;
|
205 |
|
206 |
in->sin.base.sif = &record_sif.base; |
207 |
qemu_spice_add_interface (&in->sin.base); |
208 |
return 0; |
209 |
} |
210 |
|
211 |
static void line_in_fini (HWVoiceIn *hw) |
212 |
{ |
213 |
SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
214 |
|
215 |
spice_server_remove_interface (&in->sin.base); |
216 |
} |
217 |
|
218 |
static int line_in_run (HWVoiceIn *hw) |
219 |
{ |
220 |
SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
221 |
int num_samples;
|
222 |
int ready;
|
223 |
int len[2]; |
224 |
uint64_t delta_samp; |
225 |
const uint32_t *samples;
|
226 |
|
227 |
if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
|
228 |
return 0; |
229 |
} |
230 |
|
231 |
delta_samp = rate_get_samples (&hw->info, &in->rate); |
232 |
num_samples = audio_MIN (num_samples, delta_samp); |
233 |
|
234 |
ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples); |
235 |
samples = in->samples; |
236 |
if (ready == 0) { |
237 |
static const uint32_t silence[LINE_IN_SAMPLES]; |
238 |
samples = silence; |
239 |
ready = LINE_IN_SAMPLES; |
240 |
} |
241 |
|
242 |
num_samples = audio_MIN (ready, num_samples); |
243 |
|
244 |
if (hw->wpos + num_samples > hw->samples) {
|
245 |
len[0] = hw->samples - hw->wpos;
|
246 |
len[1] = num_samples - len[0]; |
247 |
} else {
|
248 |
len[0] = num_samples;
|
249 |
len[1] = 0; |
250 |
} |
251 |
|
252 |
hw->conv (hw->conv_buf + hw->wpos, samples, len[0], &nominal_volume);
|
253 |
|
254 |
if (len[1]) { |
255 |
hw->conv (hw->conv_buf, samples + len[0], len[1], |
256 |
&nominal_volume); |
257 |
} |
258 |
|
259 |
hw->wpos = (hw->wpos + num_samples) % hw->samples; |
260 |
|
261 |
return num_samples;
|
262 |
} |
263 |
|
264 |
static int line_in_read (SWVoiceIn *sw, void *buf, int size) |
265 |
{ |
266 |
return audio_pcm_sw_read (sw, buf, size);
|
267 |
} |
268 |
|
269 |
static int line_in_ctl (HWVoiceIn *hw, int cmd, ...) |
270 |
{ |
271 |
SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); |
272 |
|
273 |
switch (cmd) {
|
274 |
case VOICE_ENABLE:
|
275 |
if (in->active) {
|
276 |
break;
|
277 |
} |
278 |
in->active = 1;
|
279 |
rate_start (&in->rate); |
280 |
spice_server_record_start (&in->sin); |
281 |
break;
|
282 |
case VOICE_DISABLE:
|
283 |
if (!in->active) {
|
284 |
break;
|
285 |
} |
286 |
in->active = 0;
|
287 |
spice_server_record_stop (&in->sin); |
288 |
break;
|
289 |
} |
290 |
return 0; |
291 |
} |
292 |
|
293 |
static struct audio_option audio_options[] = { |
294 |
{ /* end of list */ },
|
295 |
}; |
296 |
|
297 |
static struct audio_pcm_ops audio_callbacks = { |
298 |
.init_out = line_out_init, |
299 |
.fini_out = line_out_fini, |
300 |
.run_out = line_out_run, |
301 |
.write = line_out_write, |
302 |
.ctl_out = line_out_ctl, |
303 |
|
304 |
.init_in = line_in_init, |
305 |
.fini_in = line_in_fini, |
306 |
.run_in = line_in_run, |
307 |
.read = line_in_read, |
308 |
.ctl_in = line_in_ctl, |
309 |
}; |
310 |
|
311 |
struct audio_driver spice_audio_driver = {
|
312 |
.name = "spice",
|
313 |
.descr = "spice audio driver",
|
314 |
.options = audio_options, |
315 |
.init = spice_audio_init, |
316 |
.fini = spice_audio_fini, |
317 |
.pcm_ops = &audio_callbacks, |
318 |
.max_voices_out = 1,
|
319 |
.max_voices_in = 1,
|
320 |
.voice_size_out = sizeof (SpiceVoiceOut),
|
321 |
.voice_size_in = sizeof (SpiceVoiceIn),
|
322 |
}; |
323 |
|
324 |
void qemu_spice_audio_init (void) |
325 |
{ |
326 |
spice_audio_driver.can_be_default = 1;
|
327 |
} |