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24#include "qemu/osdep.h"
25#include "audio.h"
26#include "audio_int.h"
27#include "qemu/cutils.h"
28#include "qemu/timer.h"
29#include "qapi/error.h"
30#include "qapi/qapi-visit-audio.h"
31#include "qapi/visitor-impl.h"
32
33#define AUDIO_CAP "audio-legacy"
34#include "audio_int.h"
35
36static uint32_t toui32(const char *str)
37{
38 unsigned long long ret;
39 if (parse_uint_full(str, &ret, 10) || ret > UINT32_MAX) {
40 dolog("Invalid integer value `%s'\n", str);
41 exit(1);
42 }
43 return ret;
44}
45
46
47static void get_bool(const char *env, bool *dst, bool *has_dst)
48{
49 const char *val = getenv(env);
50 if (val) {
51 *dst = toui32(val) != 0;
52 *has_dst = true;
53 }
54}
55
56static void get_int(const char *env, uint32_t *dst, bool *has_dst)
57{
58 const char *val = getenv(env);
59 if (val) {
60 *dst = toui32(val);
61 *has_dst = true;
62 }
63}
64
65static void get_str(const char *env, char **dst, bool *has_dst)
66{
67 const char *val = getenv(env);
68 if (val) {
69 if (*has_dst) {
70 g_free(*dst);
71 }
72 *dst = g_strdup(val);
73 *has_dst = true;
74 }
75}
76
77static void get_fmt(const char *env, AudioFormat *dst, bool *has_dst)
78{
79 const char *val = getenv(env);
80 if (val) {
81 size_t i;
82 for (i = 0; AudioFormat_lookup.size; ++i) {
83 if (strcasecmp(val, AudioFormat_lookup.array[i]) == 0) {
84 *dst = i;
85 *has_dst = true;
86 return;
87 }
88 }
89
90 dolog("Invalid audio format `%s'\n", val);
91 exit(1);
92 }
93}
94
95
96static void get_millis_to_usecs(const char *env, uint32_t *dst, bool *has_dst)
97{
98 const char *val = getenv(env);
99 if (val) {
100 *dst = toui32(val) * 1000;
101 *has_dst = true;
102 }
103}
104
105static uint32_t frames_to_usecs(uint32_t frames,
106 AudiodevPerDirectionOptions *pdo)
107{
108 uint32_t freq = pdo->has_frequency ? pdo->frequency : 44100;
109 return (frames * 1000000 + freq / 2) / freq;
110}
111
112
113static void get_frames_to_usecs(const char *env, uint32_t *dst, bool *has_dst,
114 AudiodevPerDirectionOptions *pdo)
115{
116 const char *val = getenv(env);
117 if (val) {
118 *dst = frames_to_usecs(toui32(val), pdo);
119 *has_dst = true;
120 }
121}
122
123static uint32_t samples_to_usecs(uint32_t samples,
124 AudiodevPerDirectionOptions *pdo)
125{
126 uint32_t channels = pdo->has_channels ? pdo->channels : 2;
127 return frames_to_usecs(samples / channels, pdo);
128}
129
130static void get_samples_to_usecs(const char *env, uint32_t *dst, bool *has_dst,
131 AudiodevPerDirectionOptions *pdo)
132{
133 const char *val = getenv(env);
134 if (val) {
135 *dst = samples_to_usecs(toui32(val), pdo);
136 *has_dst = true;
137 }
138}
139
140static uint32_t bytes_to_usecs(uint32_t bytes, AudiodevPerDirectionOptions *pdo)
141{
142 AudioFormat fmt = pdo->has_format ? pdo->format : AUDIO_FORMAT_S16;
143 uint32_t bytes_per_sample = audioformat_bytes_per_sample(fmt);
144 return samples_to_usecs(bytes / bytes_per_sample, pdo);
145}
146
147static void get_bytes_to_usecs(const char *env, uint32_t *dst, bool *has_dst,
148 AudiodevPerDirectionOptions *pdo)
149{
150 const char *val = getenv(env);
151 if (val) {
152 *dst = bytes_to_usecs(toui32(val), pdo);
153 *has_dst = true;
154 }
155}
156
157
158
159static void handle_alsa_per_direction(
160 AudiodevAlsaPerDirectionOptions *apdo, const char *prefix)
161{
162 char buf[64];
163 size_t len = strlen(prefix);
164 bool size_in_usecs = false;
165 bool dummy;
166
167 memcpy(buf, prefix, len);
168 strcpy(buf + len, "TRY_POLL");
169 get_bool(buf, &apdo->try_poll, &apdo->has_try_poll);
170
171 strcpy(buf + len, "DEV");
172 get_str(buf, &apdo->dev, &apdo->has_dev);
173
174 strcpy(buf + len, "SIZE_IN_USEC");
175 get_bool(buf, &size_in_usecs, &dummy);
176
177 strcpy(buf + len, "PERIOD_SIZE");
178 get_int(buf, &apdo->period_length, &apdo->has_period_length);
179 if (apdo->has_period_length && !size_in_usecs) {
180 apdo->period_length = frames_to_usecs(
181 apdo->period_length,
182 qapi_AudiodevAlsaPerDirectionOptions_base(apdo));
183 }
184
185 strcpy(buf + len, "BUFFER_SIZE");
186 get_int(buf, &apdo->buffer_length, &apdo->has_buffer_length);
187 if (apdo->has_buffer_length && !size_in_usecs) {
188 apdo->buffer_length = frames_to_usecs(
189 apdo->buffer_length,
190 qapi_AudiodevAlsaPerDirectionOptions_base(apdo));
191 }
192}
193
194static void handle_alsa(Audiodev *dev)
195{
196 AudiodevAlsaOptions *aopt = &dev->u.alsa;
197 handle_alsa_per_direction(aopt->in, "QEMU_ALSA_ADC_");
198 handle_alsa_per_direction(aopt->out, "QEMU_ALSA_DAC_");
199
200 get_millis_to_usecs("QEMU_ALSA_THRESHOLD",
201 &aopt->threshold, &aopt->has_threshold);
202}
203
204
205static void handle_coreaudio(Audiodev *dev)
206{
207 get_frames_to_usecs(
208 "QEMU_COREAUDIO_BUFFER_SIZE",
209 &dev->u.coreaudio.out->buffer_length,
210 &dev->u.coreaudio.out->has_buffer_length,
211 qapi_AudiodevCoreaudioPerDirectionOptions_base(dev->u.coreaudio.out));
212 get_int("QEMU_COREAUDIO_BUFFER_COUNT",
213 &dev->u.coreaudio.out->buffer_count,
214 &dev->u.coreaudio.out->has_buffer_count);
215}
216
217
218static void handle_dsound(Audiodev *dev)
219{
220 get_millis_to_usecs("QEMU_DSOUND_LATENCY_MILLIS",
221 &dev->u.dsound.latency, &dev->u.dsound.has_latency);
222 get_bytes_to_usecs("QEMU_DSOUND_BUFSIZE_OUT",
223 &dev->u.dsound.out->buffer_length,
224 &dev->u.dsound.out->has_buffer_length,
225 dev->u.dsound.out);
226 get_bytes_to_usecs("QEMU_DSOUND_BUFSIZE_IN",
227 &dev->u.dsound.in->buffer_length,
228 &dev->u.dsound.in->has_buffer_length,
229 dev->u.dsound.in);
230}
231
232
233static void handle_oss_per_direction(
234 AudiodevOssPerDirectionOptions *opdo, const char *try_poll_env,
235 const char *dev_env)
236{
237 get_bool(try_poll_env, &opdo->try_poll, &opdo->has_try_poll);
238 get_str(dev_env, &opdo->dev, &opdo->has_dev);
239
240 get_bytes_to_usecs("QEMU_OSS_FRAGSIZE",
241 &opdo->buffer_length, &opdo->has_buffer_length,
242 qapi_AudiodevOssPerDirectionOptions_base(opdo));
243 get_int("QEMU_OSS_NFRAGS", &opdo->buffer_count,
244 &opdo->has_buffer_count);
245}
246
247static void handle_oss(Audiodev *dev)
248{
249 AudiodevOssOptions *oopt = &dev->u.oss;
250 handle_oss_per_direction(oopt->in, "QEMU_AUDIO_ADC_TRY_POLL",
251 "QEMU_OSS_ADC_DEV");
252 handle_oss_per_direction(oopt->out, "QEMU_AUDIO_DAC_TRY_POLL",
253 "QEMU_OSS_DAC_DEV");
254
255 get_bool("QEMU_OSS_MMAP", &oopt->try_mmap, &oopt->has_try_mmap);
256 get_bool("QEMU_OSS_EXCLUSIVE", &oopt->exclusive, &oopt->has_exclusive);
257 get_int("QEMU_OSS_POLICY", &oopt->dsp_policy, &oopt->has_dsp_policy);
258}
259
260
261static void handle_pa_per_direction(
262 AudiodevPaPerDirectionOptions *ppdo, const char *env)
263{
264 get_str(env, &ppdo->name, &ppdo->has_name);
265}
266
267static void handle_pa(Audiodev *dev)
268{
269 handle_pa_per_direction(dev->u.pa.in, "QEMU_PA_SOURCE");
270 handle_pa_per_direction(dev->u.pa.out, "QEMU_PA_SINK");
271
272 get_samples_to_usecs(
273 "QEMU_PA_SAMPLES", &dev->u.pa.in->buffer_length,
274 &dev->u.pa.in->has_buffer_length,
275 qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.in));
276 get_samples_to_usecs(
277 "QEMU_PA_SAMPLES", &dev->u.pa.out->buffer_length,
278 &dev->u.pa.out->has_buffer_length,
279 qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.out));
280
281 get_str("QEMU_PA_SERVER", &dev->u.pa.server, &dev->u.pa.has_server);
282}
283
284
285static void handle_sdl(Audiodev *dev)
286{
287
288 get_samples_to_usecs("QEMU_SDL_SAMPLES", &dev->u.sdl.out->buffer_length,
289 &dev->u.sdl.out->has_buffer_length,
290 qapi_AudiodevSdlPerDirectionOptions_base(dev->u.sdl.out));
291}
292
293
294static void handle_wav(Audiodev *dev)
295{
296 get_int("QEMU_WAV_FREQUENCY",
297 &dev->u.wav.out->frequency, &dev->u.wav.out->has_frequency);
298 get_fmt("QEMU_WAV_FORMAT", &dev->u.wav.out->format,
299 &dev->u.wav.out->has_format);
300 get_int("QEMU_WAV_DAC_FIXED_CHANNELS",
301 &dev->u.wav.out->channels, &dev->u.wav.out->has_channels);
302 get_str("QEMU_WAV_PATH", &dev->u.wav.path, &dev->u.wav.has_path);
303}
304
305
306static void handle_per_direction(
307 AudiodevPerDirectionOptions *pdo, const char *prefix)
308{
309 char buf[64];
310 size_t len = strlen(prefix);
311
312 memcpy(buf, prefix, len);
313 strcpy(buf + len, "FIXED_SETTINGS");
314 get_bool(buf, &pdo->fixed_settings, &pdo->has_fixed_settings);
315
316 strcpy(buf + len, "FIXED_FREQ");
317 get_int(buf, &pdo->frequency, &pdo->has_frequency);
318
319 strcpy(buf + len, "FIXED_FMT");
320 get_fmt(buf, &pdo->format, &pdo->has_format);
321
322 strcpy(buf + len, "FIXED_CHANNELS");
323 get_int(buf, &pdo->channels, &pdo->has_channels);
324
325 strcpy(buf + len, "VOICES");
326 get_int(buf, &pdo->voices, &pdo->has_voices);
327}
328
329static AudiodevListEntry *legacy_opt(const char *drvname)
330{
331 AudiodevListEntry *e = g_new0(AudiodevListEntry, 1);
332 e->dev = g_new0(Audiodev, 1);
333 e->dev->id = g_strdup(drvname);
334 e->dev->driver = qapi_enum_parse(
335 &AudiodevDriver_lookup, drvname, -1, &error_abort);
336
337 audio_create_pdos(e->dev);
338
339 handle_per_direction(audio_get_pdo_in(e->dev), "QEMU_AUDIO_ADC_");
340 handle_per_direction(audio_get_pdo_out(e->dev), "QEMU_AUDIO_DAC_");
341
342
343 get_int("QEMU_AUDIO_TIMER_PERIOD",
344 &e->dev->timer_period, &e->dev->has_timer_period);
345 if (e->dev->has_timer_period && e->dev->timer_period) {
346 e->dev->timer_period = NANOSECONDS_PER_SECOND / 1000 /
347 e->dev->timer_period;
348 }
349
350 switch (e->dev->driver) {
351 case AUDIODEV_DRIVER_ALSA:
352 handle_alsa(e->dev);
353 break;
354
355 case AUDIODEV_DRIVER_COREAUDIO:
356 handle_coreaudio(e->dev);
357 break;
358
359 case AUDIODEV_DRIVER_DSOUND:
360 handle_dsound(e->dev);
361 break;
362
363 case AUDIODEV_DRIVER_OSS:
364 handle_oss(e->dev);
365 break;
366
367 case AUDIODEV_DRIVER_PA:
368 handle_pa(e->dev);
369 break;
370
371 case AUDIODEV_DRIVER_SDL:
372 handle_sdl(e->dev);
373 break;
374
375 case AUDIODEV_DRIVER_WAV:
376 handle_wav(e->dev);
377 break;
378
379 default:
380 break;
381 }
382
383 return e;
384}
385
386AudiodevListHead audio_handle_legacy_opts(void)
387{
388 const char *drvname = getenv("QEMU_AUDIO_DRV");
389 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
390
391 if (drvname) {
392 AudiodevListEntry *e;
393 audio_driver *driver = audio_driver_lookup(drvname);
394 if (!driver) {
395 dolog("Unknown audio driver `%s'\n", drvname);
396 exit(1);
397 }
398 e = legacy_opt(drvname);
399 QSIMPLEQ_INSERT_TAIL(&head, e, next);
400 } else {
401 for (int i = 0; audio_prio_list[i]; i++) {
402 audio_driver *driver = audio_driver_lookup(audio_prio_list[i]);
403 if (driver && driver->can_be_default) {
404 AudiodevListEntry *e = legacy_opt(driver->name);
405 QSIMPLEQ_INSERT_TAIL(&head, e, next);
406 }
407 }
408 if (QSIMPLEQ_EMPTY(&head)) {
409 dolog("Internal error: no default audio driver available\n");
410 exit(1);
411 }
412 }
413
414 return head;
415}
416
417
418typedef struct {
419 Visitor visitor;
420
421 bool comma;
422 GList *path;
423} LegacyPrintVisitor;
424
425static bool lv_start_struct(Visitor *v, const char *name, void **obj,
426 size_t size, Error **errp)
427{
428 LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v;
429 lv->path = g_list_append(lv->path, g_strdup(name));
430 return true;
431}
432
433static void lv_end_struct(Visitor *v, void **obj)
434{
435 LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v;
436 lv->path = g_list_delete_link(lv->path, g_list_last(lv->path));
437}
438
439static void lv_print_key(Visitor *v, const char *name)
440{
441 GList *e;
442 LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v;
443 if (lv->comma) {
444 putchar(',');
445 } else {
446 lv->comma = true;
447 }
448
449 for (e = lv->path; e; e = e->next) {
450 if (e->data) {
451 printf("%s.", (const char *) e->data);
452 }
453 }
454
455 printf("%s=", name);
456}
457
458static bool lv_type_int64(Visitor *v, const char *name, int64_t *obj,
459 Error **errp)
460{
461 lv_print_key(v, name);
462 printf("%" PRIi64, *obj);
463 return true;
464}
465
466static bool lv_type_uint64(Visitor *v, const char *name, uint64_t *obj,
467 Error **errp)
468{
469 lv_print_key(v, name);
470 printf("%" PRIu64, *obj);
471 return true;
472}
473
474static bool lv_type_bool(Visitor *v, const char *name, bool *obj, Error **errp)
475{
476 lv_print_key(v, name);
477 printf("%s", *obj ? "on" : "off");
478 return true;
479}
480
481static bool lv_type_str(Visitor *v, const char *name, char **obj, Error **errp)
482{
483 const char *str = *obj;
484 lv_print_key(v, name);
485
486 while (*str) {
487 if (*str == ',') {
488 putchar(',');
489 }
490 putchar(*str++);
491 }
492 return true;
493}
494
495static void lv_complete(Visitor *v, void *opaque)
496{
497 LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v;
498 assert(lv->path == NULL);
499}
500
501static void lv_free(Visitor *v)
502{
503 LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v;
504
505 g_list_free_full(lv->path, g_free);
506 g_free(lv);
507}
508
509static Visitor *legacy_visitor_new(void)
510{
511 LegacyPrintVisitor *lv = g_new0(LegacyPrintVisitor, 1);
512
513 lv->visitor.start_struct = lv_start_struct;
514 lv->visitor.end_struct = lv_end_struct;
515
516 lv->visitor.type_int64 = lv_type_int64;
517 lv->visitor.type_uint64 = lv_type_uint64;
518 lv->visitor.type_bool = lv_type_bool;
519 lv->visitor.type_str = lv_type_str;
520
521 lv->visitor.type = VISITOR_OUTPUT;
522 lv->visitor.complete = lv_complete;
523 lv->visitor.free = lv_free;
524
525 return &lv->visitor;
526}
527
528void audio_legacy_help(void)
529{
530 AudiodevListHead head;
531 AudiodevListEntry *e;
532
533 printf("Environment variable based configuration deprecated.\n");
534 printf("Please use the new -audiodev option.\n");
535
536 head = audio_handle_legacy_opts();
537 printf("\nEquivalent -audiodev to your current environment variables:\n");
538 if (!getenv("QEMU_AUDIO_DRV")) {
539 printf("(Since you didn't specify QEMU_AUDIO_DRV, I'll list all "
540 "possibilities)\n");
541 }
542
543 QSIMPLEQ_FOREACH(e, &head, next) {
544 Visitor *v;
545 Audiodev *dev = e->dev;
546 printf("-audiodev ");
547
548 v = legacy_visitor_new();
549 visit_type_Audiodev(v, NULL, &dev, &error_abort);
550 visit_free(v);
551
552 printf("\n");
553 }
554 audio_free_audiodev_list(&head);
555}
556
