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| 1 |
/* public domain */
|
|---|---|
| 2 |
#include "qemu-common.h" |
| 3 |
#include "audio.h" |
| 4 |
|
| 5 |
#include <pulse/simple.h> |
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#include <pulse/error.h> |
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|
| 8 |
#define AUDIO_CAP "pulseaudio" |
| 9 |
#include "audio_int.h" |
| 10 |
#include "audio_pt_int.h" |
| 11 |
|
| 12 |
typedef struct { |
| 13 |
HWVoiceOut hw; |
| 14 |
int done;
|
| 15 |
int live;
|
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int decr;
|
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int rpos;
|
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pa_simple *s; |
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void *pcm_buf;
|
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struct audio_pt pt;
|
| 21 |
} PAVoiceOut; |
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|
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typedef struct { |
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HWVoiceIn hw; |
| 25 |
int done;
|
| 26 |
int dead;
|
| 27 |
int incr;
|
| 28 |
int wpos;
|
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pa_simple *s; |
| 30 |
void *pcm_buf;
|
| 31 |
struct audio_pt pt;
|
| 32 |
} PAVoiceIn; |
| 33 |
|
| 34 |
static struct { |
| 35 |
int samples;
|
| 36 |
char *server;
|
| 37 |
char *sink;
|
| 38 |
char *source;
|
| 39 |
} conf = {
|
| 40 |
.samples = 4096,
|
| 41 |
}; |
| 42 |
|
| 43 |
static void GCC_FMT_ATTR (2, 3) qpa_logerr (int err, const char *fmt, ...) |
| 44 |
{
|
| 45 |
va_list ap; |
| 46 |
|
| 47 |
va_start (ap, fmt); |
| 48 |
AUD_vlog (AUDIO_CAP, fmt, ap); |
| 49 |
va_end (ap); |
| 50 |
|
| 51 |
AUD_log (AUDIO_CAP, "Reason: %s\n", pa_strerror (err));
|
| 52 |
} |
| 53 |
|
| 54 |
static void *qpa_thread_out (void *arg) |
| 55 |
{
|
| 56 |
PAVoiceOut *pa = arg; |
| 57 |
HWVoiceOut *hw = &pa->hw; |
| 58 |
|
| 59 |
if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
|
| 60 |
return NULL; |
| 61 |
} |
| 62 |
|
| 63 |
for (;;) {
|
| 64 |
int decr, to_mix, rpos;
|
| 65 |
|
| 66 |
for (;;) {
|
| 67 |
if (pa->done) {
|
| 68 |
goto exit;
|
| 69 |
} |
| 70 |
|
| 71 |
if (pa->live > 0) { |
| 72 |
break;
|
| 73 |
} |
| 74 |
|
| 75 |
if (audio_pt_wait (&pa->pt, AUDIO_FUNC)) {
|
| 76 |
goto exit;
|
| 77 |
} |
| 78 |
} |
| 79 |
|
| 80 |
decr = to_mix = audio_MIN (pa->live, conf.samples >> 2);
|
| 81 |
rpos = pa->rpos; |
| 82 |
|
| 83 |
if (audio_pt_unlock (&pa->pt, AUDIO_FUNC)) {
|
| 84 |
return NULL; |
| 85 |
} |
| 86 |
|
| 87 |
while (to_mix) {
|
| 88 |
int error;
|
| 89 |
int chunk = audio_MIN (to_mix, hw->samples - rpos);
|
| 90 |
struct st_sample *src = hw->mix_buf + rpos;
|
| 91 |
|
| 92 |
hw->clip (pa->pcm_buf, src, chunk); |
| 93 |
|
| 94 |
if (pa_simple_write (pa->s, pa->pcm_buf,
|
| 95 |
chunk << hw->info.shift, &error) < 0) {
|
| 96 |
qpa_logerr (error, "pa_simple_write failed\n");
|
| 97 |
return NULL; |
| 98 |
} |
| 99 |
|
| 100 |
rpos = (rpos + chunk) % hw->samples; |
| 101 |
to_mix -= chunk; |
| 102 |
} |
| 103 |
|
| 104 |
if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
|
| 105 |
return NULL; |
| 106 |
} |
| 107 |
|
| 108 |
pa->rpos = rpos; |
| 109 |
pa->live -= decr; |
| 110 |
pa->decr += decr; |
| 111 |
} |
| 112 |
|
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exit:
|
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audio_pt_unlock (&pa->pt, AUDIO_FUNC); |
| 115 |
return NULL; |
| 116 |
} |
| 117 |
|
| 118 |
static int qpa_run_out (HWVoiceOut *hw, int live) |
| 119 |
{
|
| 120 |
int decr;
|
| 121 |
PAVoiceOut *pa = (PAVoiceOut *) hw; |
| 122 |
|
| 123 |
if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
|
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return 0; |
| 125 |
} |
| 126 |
|
| 127 |
decr = audio_MIN (live, pa->decr); |
| 128 |
pa->decr -= decr; |
| 129 |
pa->live = live - decr; |
| 130 |
hw->rpos = pa->rpos; |
| 131 |
if (pa->live > 0) { |
| 132 |
audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC); |
| 133 |
} |
| 134 |
else {
|
| 135 |
audio_pt_unlock (&pa->pt, AUDIO_FUNC); |
| 136 |
} |
| 137 |
return decr;
|
| 138 |
} |
| 139 |
|
| 140 |
static int qpa_write (SWVoiceOut *sw, void *buf, int len) |
| 141 |
{
|
| 142 |
return audio_pcm_sw_write (sw, buf, len);
|
| 143 |
} |
| 144 |
|
| 145 |
/* capture */
|
| 146 |
static void *qpa_thread_in (void *arg) |
| 147 |
{
|
| 148 |
PAVoiceIn *pa = arg; |
| 149 |
HWVoiceIn *hw = &pa->hw; |
| 150 |
|
| 151 |
if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
|
| 152 |
return NULL; |
| 153 |
} |
| 154 |
|
| 155 |
for (;;) {
|
| 156 |
int incr, to_grab, wpos;
|
| 157 |
|
| 158 |
for (;;) {
|
| 159 |
if (pa->done) {
|
| 160 |
goto exit;
|
| 161 |
} |
| 162 |
|
| 163 |
if (pa->dead > 0) { |
| 164 |
break;
|
| 165 |
} |
| 166 |
|
| 167 |
if (audio_pt_wait (&pa->pt, AUDIO_FUNC)) {
|
| 168 |
goto exit;
|
| 169 |
} |
| 170 |
} |
| 171 |
|
| 172 |
incr = to_grab = audio_MIN (pa->dead, conf.samples >> 2);
|
| 173 |
wpos = pa->wpos; |
| 174 |
|
| 175 |
if (audio_pt_unlock (&pa->pt, AUDIO_FUNC)) {
|
| 176 |
return NULL; |
| 177 |
} |
| 178 |
|
| 179 |
while (to_grab) {
|
| 180 |
int error;
|
| 181 |
int chunk = audio_MIN (to_grab, hw->samples - wpos);
|
| 182 |
void *buf = advance (pa->pcm_buf, wpos);
|
| 183 |
|
| 184 |
if (pa_simple_read (pa->s, buf,
|
| 185 |
chunk << hw->info.shift, &error) < 0) {
|
| 186 |
qpa_logerr (error, "pa_simple_read failed\n");
|
| 187 |
return NULL; |
| 188 |
} |
| 189 |
|
| 190 |
hw->conv (hw->conv_buf + wpos, buf, chunk); |
| 191 |
wpos = (wpos + chunk) % hw->samples; |
| 192 |
to_grab -= chunk; |
| 193 |
} |
| 194 |
|
| 195 |
if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
|
| 196 |
return NULL; |
| 197 |
} |
| 198 |
|
| 199 |
pa->wpos = wpos; |
| 200 |
pa->dead -= incr; |
| 201 |
pa->incr += incr; |
| 202 |
} |
| 203 |
|
| 204 |
exit:
|
| 205 |
audio_pt_unlock (&pa->pt, AUDIO_FUNC); |
| 206 |
return NULL; |
| 207 |
} |
| 208 |
|
| 209 |
static int qpa_run_in (HWVoiceIn *hw) |
| 210 |
{
|
| 211 |
int live, incr, dead;
|
| 212 |
PAVoiceIn *pa = (PAVoiceIn *) hw; |
| 213 |
|
| 214 |
if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
|
| 215 |
return 0; |
| 216 |
} |
| 217 |
|
| 218 |
live = audio_pcm_hw_get_live_in (hw); |
| 219 |
dead = hw->samples - live; |
| 220 |
incr = audio_MIN (dead, pa->incr); |
| 221 |
pa->incr -= incr; |
| 222 |
pa->dead = dead - incr; |
| 223 |
hw->wpos = pa->wpos; |
| 224 |
if (pa->dead > 0) { |
| 225 |
audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC); |
| 226 |
} |
| 227 |
else {
|
| 228 |
audio_pt_unlock (&pa->pt, AUDIO_FUNC); |
| 229 |
} |
| 230 |
return incr;
|
| 231 |
} |
| 232 |
|
| 233 |
static int qpa_read (SWVoiceIn *sw, void *buf, int len) |
| 234 |
{
|
| 235 |
return audio_pcm_sw_read (sw, buf, len);
|
| 236 |
} |
| 237 |
|
| 238 |
static pa_sample_format_t audfmt_to_pa (audfmt_e afmt, int endianness) |
| 239 |
{
|
| 240 |
int format;
|
| 241 |
|
| 242 |
switch (afmt) {
|
| 243 |
case AUD_FMT_S8:
|
| 244 |
case AUD_FMT_U8:
|
| 245 |
format = PA_SAMPLE_U8; |
| 246 |
break;
|
| 247 |
case AUD_FMT_S16:
|
| 248 |
case AUD_FMT_U16:
|
| 249 |
format = endianness ? PA_SAMPLE_S16BE : PA_SAMPLE_S16LE; |
| 250 |
break;
|
| 251 |
case AUD_FMT_S32:
|
| 252 |
case AUD_FMT_U32:
|
| 253 |
format = endianness ? PA_SAMPLE_S32BE : PA_SAMPLE_S32LE; |
| 254 |
break;
|
| 255 |
default:
|
| 256 |
dolog ("Internal logic error: Bad audio format %d\n", afmt);
|
| 257 |
format = PA_SAMPLE_U8; |
| 258 |
break;
|
| 259 |
} |
| 260 |
return format;
|
| 261 |
} |
| 262 |
|
| 263 |
static audfmt_e pa_to_audfmt (pa_sample_format_t fmt, int *endianness) |
| 264 |
{
|
| 265 |
switch (fmt) {
|
| 266 |
case PA_SAMPLE_U8:
|
| 267 |
return AUD_FMT_U8;
|
| 268 |
case PA_SAMPLE_S16BE:
|
| 269 |
*endianness = 1;
|
| 270 |
return AUD_FMT_S16;
|
| 271 |
case PA_SAMPLE_S16LE:
|
| 272 |
*endianness = 0;
|
| 273 |
return AUD_FMT_S16;
|
| 274 |
case PA_SAMPLE_S32BE:
|
| 275 |
*endianness = 1;
|
| 276 |
return AUD_FMT_S32;
|
| 277 |
case PA_SAMPLE_S32LE:
|
| 278 |
*endianness = 0;
|
| 279 |
return AUD_FMT_S32;
|
| 280 |
default:
|
| 281 |
dolog ("Internal logic error: Bad pa_sample_format %d\n", fmt);
|
| 282 |
return AUD_FMT_U8;
|
| 283 |
} |
| 284 |
} |
| 285 |
|
| 286 |
static int qpa_init_out (HWVoiceOut *hw, struct audsettings *as) |
| 287 |
{
|
| 288 |
int error;
|
| 289 |
static pa_sample_spec ss;
|
| 290 |
static pa_buffer_attr ba;
|
| 291 |
struct audsettings obt_as = *as;
|
| 292 |
PAVoiceOut *pa = (PAVoiceOut *) hw; |
| 293 |
|
| 294 |
ss.format = audfmt_to_pa (as->fmt, as->endianness); |
| 295 |
ss.channels = as->nchannels; |
| 296 |
ss.rate = as->freq; |
| 297 |
|
| 298 |
/*
|
| 299 |
* qemu audio tick runs at 250 Hz (by default), so processing
|
| 300 |
* data chunks worth 4 ms of sound should be a good fit.
|
| 301 |
*/
|
| 302 |
ba.tlength = pa_usec_to_bytes (4 * 1000, &ss); |
| 303 |
ba.minreq = pa_usec_to_bytes (2 * 1000, &ss); |
| 304 |
ba.maxlength = -1;
|
| 305 |
ba.prebuf = -1;
|
| 306 |
|
| 307 |
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness); |
| 308 |
|
| 309 |
pa->s = pa_simple_new ( |
| 310 |
conf.server, |
| 311 |
"qemu",
|
| 312 |
PA_STREAM_PLAYBACK, |
| 313 |
conf.sink, |
| 314 |
"pcm.playback",
|
| 315 |
&ss, |
| 316 |
NULL, /* channel map */ |
| 317 |
&ba, /* buffering attributes */
|
| 318 |
&error |
| 319 |
); |
| 320 |
if (!pa->s) {
|
| 321 |
qpa_logerr (error, "pa_simple_new for playback failed\n");
|
| 322 |
goto fail1;
|
| 323 |
} |
| 324 |
|
| 325 |
audio_pcm_init_info (&hw->info, &obt_as); |
| 326 |
hw->samples = conf.samples; |
| 327 |
pa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
|
| 328 |
pa->rpos = hw->rpos; |
| 329 |
if (!pa->pcm_buf) {
|
| 330 |
dolog ("Could not allocate buffer (%d bytes)\n",
|
| 331 |
hw->samples << hw->info.shift); |
| 332 |
goto fail2;
|
| 333 |
} |
| 334 |
|
| 335 |
if (audio_pt_init (&pa->pt, qpa_thread_out, hw, AUDIO_CAP, AUDIO_FUNC)) {
|
| 336 |
goto fail3;
|
| 337 |
} |
| 338 |
|
| 339 |
return 0; |
| 340 |
|
| 341 |
fail3:
|
| 342 |
g_free (pa->pcm_buf); |
| 343 |
pa->pcm_buf = NULL;
|
| 344 |
fail2:
|
| 345 |
pa_simple_free (pa->s); |
| 346 |
pa->s = NULL;
|
| 347 |
fail1:
|
| 348 |
return -1; |
| 349 |
} |
| 350 |
|
| 351 |
static int qpa_init_in (HWVoiceIn *hw, struct audsettings *as) |
| 352 |
{
|
| 353 |
int error;
|
| 354 |
static pa_sample_spec ss;
|
| 355 |
struct audsettings obt_as = *as;
|
| 356 |
PAVoiceIn *pa = (PAVoiceIn *) hw; |
| 357 |
|
| 358 |
ss.format = audfmt_to_pa (as->fmt, as->endianness); |
| 359 |
ss.channels = as->nchannels; |
| 360 |
ss.rate = as->freq; |
| 361 |
|
| 362 |
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness); |
| 363 |
|
| 364 |
pa->s = pa_simple_new ( |
| 365 |
conf.server, |
| 366 |
"qemu",
|
| 367 |
PA_STREAM_RECORD, |
| 368 |
conf.source, |
| 369 |
"pcm.capture",
|
| 370 |
&ss, |
| 371 |
NULL, /* channel map */ |
| 372 |
NULL, /* buffering attributes */ |
| 373 |
&error |
| 374 |
); |
| 375 |
if (!pa->s) {
|
| 376 |
qpa_logerr (error, "pa_simple_new for capture failed\n");
|
| 377 |
goto fail1;
|
| 378 |
} |
| 379 |
|
| 380 |
audio_pcm_init_info (&hw->info, &obt_as); |
| 381 |
hw->samples = conf.samples; |
| 382 |
pa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
|
| 383 |
pa->wpos = hw->wpos; |
| 384 |
if (!pa->pcm_buf) {
|
| 385 |
dolog ("Could not allocate buffer (%d bytes)\n",
|
| 386 |
hw->samples << hw->info.shift); |
| 387 |
goto fail2;
|
| 388 |
} |
| 389 |
|
| 390 |
if (audio_pt_init (&pa->pt, qpa_thread_in, hw, AUDIO_CAP, AUDIO_FUNC)) {
|
| 391 |
goto fail3;
|
| 392 |
} |
| 393 |
|
| 394 |
return 0; |
| 395 |
|
| 396 |
fail3:
|
| 397 |
g_free (pa->pcm_buf); |
| 398 |
pa->pcm_buf = NULL;
|
| 399 |
fail2:
|
| 400 |
pa_simple_free (pa->s); |
| 401 |
pa->s = NULL;
|
| 402 |
fail1:
|
| 403 |
return -1; |
| 404 |
} |
| 405 |
|
| 406 |
static void qpa_fini_out (HWVoiceOut *hw) |
| 407 |
{
|
| 408 |
void *ret;
|
| 409 |
PAVoiceOut *pa = (PAVoiceOut *) hw; |
| 410 |
|
| 411 |
audio_pt_lock (&pa->pt, AUDIO_FUNC); |
| 412 |
pa->done = 1;
|
| 413 |
audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC); |
| 414 |
audio_pt_join (&pa->pt, &ret, AUDIO_FUNC); |
| 415 |
|
| 416 |
if (pa->s) {
|
| 417 |
pa_simple_free (pa->s); |
| 418 |
pa->s = NULL;
|
| 419 |
} |
| 420 |
|
| 421 |
audio_pt_fini (&pa->pt, AUDIO_FUNC); |
| 422 |
g_free (pa->pcm_buf); |
| 423 |
pa->pcm_buf = NULL;
|
| 424 |
} |
| 425 |
|
| 426 |
static void qpa_fini_in (HWVoiceIn *hw) |
| 427 |
{
|
| 428 |
void *ret;
|
| 429 |
PAVoiceIn *pa = (PAVoiceIn *) hw; |
| 430 |
|
| 431 |
audio_pt_lock (&pa->pt, AUDIO_FUNC); |
| 432 |
pa->done = 1;
|
| 433 |
audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC); |
| 434 |
audio_pt_join (&pa->pt, &ret, AUDIO_FUNC); |
| 435 |
|
| 436 |
if (pa->s) {
|
| 437 |
pa_simple_free (pa->s); |
| 438 |
pa->s = NULL;
|
| 439 |
} |
| 440 |
|
| 441 |
audio_pt_fini (&pa->pt, AUDIO_FUNC); |
| 442 |
g_free (pa->pcm_buf); |
| 443 |
pa->pcm_buf = NULL;
|
| 444 |
} |
| 445 |
|
| 446 |
static int qpa_ctl_out (HWVoiceOut *hw, int cmd, ...) |
| 447 |
{
|
| 448 |
(void) hw;
|
| 449 |
(void) cmd;
|
| 450 |
return 0; |
| 451 |
} |
| 452 |
|
| 453 |
static int qpa_ctl_in (HWVoiceIn *hw, int cmd, ...) |
| 454 |
{
|
| 455 |
(void) hw;
|
| 456 |
(void) cmd;
|
| 457 |
return 0; |
| 458 |
} |
| 459 |
|
| 460 |
/* common */
|
| 461 |
static void *qpa_audio_init (void) |
| 462 |
{
|
| 463 |
return &conf;
|
| 464 |
} |
| 465 |
|
| 466 |
static void qpa_audio_fini (void *opaque) |
| 467 |
{
|
| 468 |
(void) opaque;
|
| 469 |
} |
| 470 |
|
| 471 |
struct audio_option qpa_options[] = {
|
| 472 |
{
|
| 473 |
.name = "SAMPLES",
|
| 474 |
.tag = AUD_OPT_INT, |
| 475 |
.valp = &conf.samples, |
| 476 |
.descr = "buffer size in samples"
|
| 477 |
}, |
| 478 |
{
|
| 479 |
.name = "SERVER",
|
| 480 |
.tag = AUD_OPT_STR, |
| 481 |
.valp = &conf.server, |
| 482 |
.descr = "server address"
|
| 483 |
}, |
| 484 |
{
|
| 485 |
.name = "SINK",
|
| 486 |
.tag = AUD_OPT_STR, |
| 487 |
.valp = &conf.sink, |
| 488 |
.descr = "sink device name"
|
| 489 |
}, |
| 490 |
{
|
| 491 |
.name = "SOURCE",
|
| 492 |
.tag = AUD_OPT_STR, |
| 493 |
.valp = &conf.source, |
| 494 |
.descr = "source device name"
|
| 495 |
}, |
| 496 |
{ /* End of list */ }
|
| 497 |
}; |
| 498 |
|
| 499 |
static struct audio_pcm_ops qpa_pcm_ops = { |
| 500 |
.init_out = qpa_init_out, |
| 501 |
.fini_out = qpa_fini_out, |
| 502 |
.run_out = qpa_run_out, |
| 503 |
.write = qpa_write, |
| 504 |
.ctl_out = qpa_ctl_out, |
| 505 |
|
| 506 |
.init_in = qpa_init_in, |
| 507 |
.fini_in = qpa_fini_in, |
| 508 |
.run_in = qpa_run_in, |
| 509 |
.read = qpa_read, |
| 510 |
.ctl_in = qpa_ctl_in |
| 511 |
}; |
| 512 |
|
| 513 |
struct audio_driver pa_audio_driver = {
|
| 514 |
.name = "pa",
|
| 515 |
.descr = "http://www.pulseaudio.org/",
|
| 516 |
.options = qpa_options, |
| 517 |
.init = qpa_audio_init, |
| 518 |
.fini = qpa_audio_fini, |
| 519 |
.pcm_ops = &qpa_pcm_ops, |
| 520 |
.can_be_default = 1,
|
| 521 |
.max_voices_out = INT_MAX, |
| 522 |
.max_voices_in = INT_MAX, |
| 523 |
.voice_size_out = sizeof (PAVoiceOut),
|
| 524 |
.voice_size_in = sizeof (PAVoiceIn)
|
| 525 |
}; |