?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
sheepdog: add missing .bdrv_has_zero_init
[qemu-kvm.git] / hw / usb / dev-audio.c
blobc5420eb057b372a1a4fc5e48d0e507f41cdafb14
1 /*
2 * QEMU USB audio device
3 *
4 * written by:
5 * H. Peter Anvin <hpa@linux.intel.com>
6 * Gerd Hoffmann <kraxel@redhat.com>
7 *
8 * lousely based on usb net device code which is:
9 *
10 * Copyright (c) 2006 Thomas Sailer
11 * Copyright (c) 2008 Andrzej Zaborowski
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining a copy
14 * of this software and associated documentation files (the "Software"), to deal
15 * in the Software without restriction, including without limitation the rights
16 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
17 * copies of the Software, and to permit persons to whom the Software is
18 * furnished to do so, subject to the following conditions:
19 *
20 * The above copyright notice and this permission notice shall be included in
21 * all copies or substantial portions of the Software.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
28 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 * THE SOFTWARE.
30 */
31
32 #include "qemu-common.h"
33 #include "hw/usb.h"
34 #include "hw/usb/desc.h"
35 #include "hw/hw.h"
36 #include "audio/audio.h"
37
38 #define USBAUDIO_VENDOR_NUM 0x46f4 /* CRC16() of "QEMU" */
39 #define USBAUDIO_PRODUCT_NUM 0x0002
40
41 #define DEV_CONFIG_VALUE 1 /* The one and only */
42
43 /* Descriptor subtypes for AC interfaces */
44 #define DST_AC_HEADER 1
45 #define DST_AC_INPUT_TERMINAL 2
46 #define DST_AC_OUTPUT_TERMINAL 3
47 #define DST_AC_FEATURE_UNIT 6
48 /* Descriptor subtypes for AS interfaces */
49 #define DST_AS_GENERAL 1
50 #define DST_AS_FORMAT_TYPE 2
51 /* Descriptor subtypes for endpoints */
52 #define DST_EP_GENERAL 1
53
54 enum usb_audio_strings {
55 STRING_NULL,
56 STRING_MANUFACTURER,
57 STRING_PRODUCT,
58 STRING_SERIALNUMBER,
59 STRING_CONFIG,
60 STRING_USBAUDIO_CONTROL,
61 STRING_INPUT_TERMINAL,
62 STRING_FEATURE_UNIT,
63 STRING_OUTPUT_TERMINAL,
64 STRING_NULL_STREAM,
65 STRING_REAL_STREAM,
66 };
67
68 static const USBDescStrings usb_audio_stringtable = {
69 [STRING_MANUFACTURER] = "QEMU",
70 [STRING_PRODUCT] = "QEMU USB Audio",
71 [STRING_SERIALNUMBER] = "1",
72 [STRING_CONFIG] = "Audio Configuration",
73 [STRING_USBAUDIO_CONTROL] = "Audio Device",
74 [STRING_INPUT_TERMINAL] = "Audio Output Pipe",
75 [STRING_FEATURE_UNIT] = "Audio Output Volume Control",
76 [STRING_OUTPUT_TERMINAL] = "Audio Output Terminal",
77 [STRING_NULL_STREAM] = "Audio Output - Disabled",
78 [STRING_REAL_STREAM] = "Audio Output - 48 kHz Stereo",
79 };
80
81 #define U16(x) ((x) & 0xff), (((x) >> 8) & 0xff)
82 #define U24(x) U16(x), (((x) >> 16) & 0xff)
83 #define U32(x) U24(x), (((x) >> 24) & 0xff)
84
85 /*
86 * A Basic Audio Device uses these specific values
87 */
88 #define USBAUDIO_PACKET_SIZE 192
89 #define USBAUDIO_SAMPLE_RATE 48000
90 #define USBAUDIO_PACKET_INTERVAL 1
91
92 static const USBDescIface desc_iface[] = {
93 {
94 .bInterfaceNumber = 0,
95 .bNumEndpoints = 0,
96 .bInterfaceClass = USB_CLASS_AUDIO,
97 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL,
98 .bInterfaceProtocol = 0x04,
99 .iInterface = STRING_USBAUDIO_CONTROL,
100 .ndesc = 4,
101 .descs = (USBDescOther[]) {
102 {
103 /* Headphone Class-Specific AC Interface Header Descriptor */
104 .data = (uint8_t[]) {
105 0x09, /* u8 bLength */
106 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
107 DST_AC_HEADER, /* u8 bDescriptorSubtype */
108 U16(0x0100), /* u16 bcdADC */
109 U16(0x2b), /* u16 wTotalLength */
110 0x01, /* u8 bInCollection */
111 0x01, /* u8 baInterfaceNr */
112 }
113 },{
114 /* Generic Stereo Input Terminal ID1 Descriptor */
115 .data = (uint8_t[]) {
116 0x0c, /* u8 bLength */
117 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
118 DST_AC_INPUT_TERMINAL, /* u8 bDescriptorSubtype */
119 0x01, /* u8 bTerminalID */
120 U16(0x0101), /* u16 wTerminalType */
121 0x00, /* u8 bAssocTerminal */
122 0x02, /* u16 bNrChannels */
123 U16(0x0003), /* u16 wChannelConfig */
124 0x00, /* u8 iChannelNames */
125 STRING_INPUT_TERMINAL, /* u8 iTerminal */
126 }
127 },{
128 /* Generic Stereo Feature Unit ID2 Descriptor */
129 .data = (uint8_t[]) {
130 0x0d, /* u8 bLength */
131 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
132 DST_AC_FEATURE_UNIT, /* u8 bDescriptorSubtype */
133 0x02, /* u8 bUnitID */
134 0x01, /* u8 bSourceID */
135 0x02, /* u8 bControlSize */
136 U16(0x0001), /* u16 bmaControls(0) */
137 U16(0x0002), /* u16 bmaControls(1) */
138 U16(0x0002), /* u16 bmaControls(2) */
139 STRING_FEATURE_UNIT, /* u8 iFeature */
140 }
141 },{
142 /* Headphone Ouptut Terminal ID3 Descriptor */
143 .data = (uint8_t[]) {
144 0x09, /* u8 bLength */
145 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
146 DST_AC_OUTPUT_TERMINAL, /* u8 bDescriptorSubtype */
147 0x03, /* u8 bUnitID */
148 U16(0x0301), /* u16 wTerminalType (SPK) */
149 0x00, /* u8 bAssocTerminal */
150 0x02, /* u8 bSourceID */
151 STRING_OUTPUT_TERMINAL, /* u8 iTerminal */
152 }
153 }
154 },
155 },{
156 .bInterfaceNumber = 1,
157 .bAlternateSetting = 0,
158 .bNumEndpoints = 0,
159 .bInterfaceClass = USB_CLASS_AUDIO,
160 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING,
161 .iInterface = STRING_NULL_STREAM,
162 },{
163 .bInterfaceNumber = 1,
164 .bAlternateSetting = 1,
165 .bNumEndpoints = 1,
166 .bInterfaceClass = USB_CLASS_AUDIO,
167 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING,
168 .iInterface = STRING_REAL_STREAM,
169 .ndesc = 2,
170 .descs = (USBDescOther[]) {
171 {
172 /* Headphone Class-specific AS General Interface Descriptor */
173 .data = (uint8_t[]) {
174 0x07, /* u8 bLength */
175 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
176 DST_AS_GENERAL, /* u8 bDescriptorSubtype */
177 0x01, /* u8 bTerminalLink */
178 0x00, /* u8 bDelay */
179 0x01, 0x00, /* u16 wFormatTag */
180 }
181 },{
182 /* Headphone Type I Format Type Descriptor */
183 .data = (uint8_t[]) {
184 0x0b, /* u8 bLength */
185 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
186 DST_AS_FORMAT_TYPE, /* u8 bDescriptorSubtype */
187 0x01, /* u8 bFormatType */
188 0x02, /* u8 bNrChannels */
189 0x02, /* u8 bSubFrameSize */
190 0x10, /* u8 bBitResolution */
191 0x01, /* u8 bSamFreqType */
192 U24(USBAUDIO_SAMPLE_RATE), /* u24 tSamFreq */
193 }
194 }
195 },
196 .eps = (USBDescEndpoint[]) {
197 {
198 .bEndpointAddress = USB_DIR_OUT | 0x01,
199 .bmAttributes = 0x0d,
200 .wMaxPacketSize = USBAUDIO_PACKET_SIZE,
201 .bInterval = 1,
202 .is_audio = 1,
203 /* Stereo Headphone Class-specific
204 AS Audio Data Endpoint Descriptor */
205 .extra = (uint8_t[]) {
206 0x07, /* u8 bLength */
207 USB_DT_CS_ENDPOINT, /* u8 bDescriptorType */
208 DST_EP_GENERAL, /* u8 bDescriptorSubtype */
209 0x00, /* u8 bmAttributes */
210 0x00, /* u8 bLockDelayUnits */
211 U16(0x0000), /* u16 wLockDelay */
212 },
213 },
214 }
215 }
216 };
217
218 static const USBDescDevice desc_device = {
219 .bcdUSB = 0x0100,
220 .bMaxPacketSize0 = 64,
221 .bNumConfigurations = 1,
222 .confs = (USBDescConfig[]) {
223 {
224 .bNumInterfaces = 2,
225 .bConfigurationValue = DEV_CONFIG_VALUE,
226 .iConfiguration = STRING_CONFIG,
227 .bmAttributes = 0xc0,
228 .bMaxPower = 0x32,
229 .nif = ARRAY_SIZE(desc_iface),
230 .ifs = desc_iface,
231 },
232 },
233 };
234
235 static const USBDesc desc_audio = {
236 .id = {
237 .idVendor = USBAUDIO_VENDOR_NUM,
238 .idProduct = USBAUDIO_PRODUCT_NUM,
239 .bcdDevice = 0,
240 .iManufacturer = STRING_MANUFACTURER,
241 .iProduct = STRING_PRODUCT,
242 .iSerialNumber = STRING_SERIALNUMBER,
243 },
244 .full = &desc_device,
245 .str = usb_audio_stringtable,
246 };
247
248 /*
249 * A USB audio device supports an arbitrary number of alternate
250 * interface settings for each interface. Each corresponds to a block
251 * diagram of parameterized blocks. This can thus refer to things like
252 * number of channels, data rates, or in fact completely different
253 * block diagrams. Alternative setting 0 is always the null block diagram,
254 * which is used by a disabled device.
255 */
256 enum usb_audio_altset {
257 ALTSET_OFF = 0x00, /* No endpoint */
258 ALTSET_ON = 0x01, /* Single endpoint */
259 };
260
261 /*
262 * Class-specific control requests
263 */
264 #define CR_SET_CUR 0x01
265 #define CR_GET_CUR 0x81
266 #define CR_SET_MIN 0x02
267 #define CR_GET_MIN 0x82
268 #define CR_SET_MAX 0x03
269 #define CR_GET_MAX 0x83
270 #define CR_SET_RES 0x04
271 #define CR_GET_RES 0x84
272 #define CR_SET_MEM 0x05
273 #define CR_GET_MEM 0x85
274 #define CR_GET_STAT 0xff
275
276 /*
277 * Feature Unit Control Selectors
278 */
279 #define MUTE_CONTROL 0x01
280 #define VOLUME_CONTROL 0x02
281 #define BASS_CONTROL 0x03
282 #define MID_CONTROL 0x04
283 #define TREBLE_CONTROL 0x05
284 #define GRAPHIC_EQUALIZER_CONTROL 0x06
285 #define AUTOMATIC_GAIN_CONTROL 0x07
286 #define DELAY_CONTROL 0x08
287 #define BASS_BOOST_CONTROL 0x09
288 #define LOUDNESS_CONTROL 0x0a
289
290 /*
291 * buffering
292 */
293
294 struct streambuf {
295 uint8_t *data;
296 uint32_t size;
297 uint32_t prod;
298 uint32_t cons;
299 };
300
301 static void streambuf_init(struct streambuf *buf, uint32_t size)
302 {
303 g_free(buf->data);
304 buf->size = size - (size % USBAUDIO_PACKET_SIZE);
305 buf->data = g_malloc(buf->size);
306 buf->prod = 0;
307 buf->cons = 0;
308 }
309
310 static void streambuf_fini(struct streambuf *buf)
311 {
312 g_free(buf->data);
313 buf->data = NULL;
314 }
315
316 static int streambuf_put(struct streambuf *buf, USBPacket *p)
317 {
318 uint32_t free = buf->size - (buf->prod - buf->cons);
319
320 if (!free) {
321 return 0;
322 }
323 assert(free >= USBAUDIO_PACKET_SIZE);
324 usb_packet_copy(p, buf->data + (buf->prod % buf->size),
325 USBAUDIO_PACKET_SIZE);
326 buf->prod += USBAUDIO_PACKET_SIZE;
327 return USBAUDIO_PACKET_SIZE;
328 }
329
330 static uint8_t *streambuf_get(struct streambuf *buf)
331 {
332 uint32_t used = buf->prod - buf->cons;
333 uint8_t *data;
334
335 if (!used) {
336 return NULL;
337 }
338 assert(used >= USBAUDIO_PACKET_SIZE);
339 data = buf->data + (buf->cons % buf->size);
340 buf->cons += USBAUDIO_PACKET_SIZE;
341 return data;
342 }
343
344 typedef struct USBAudioState {
345 /* qemu interfaces */
346 USBDevice dev;
347 QEMUSoundCard card;
348
349 /* state */
350 struct {
351 enum usb_audio_altset altset;
352 struct audsettings as;
353 SWVoiceOut *voice;
354 bool mute;
355 uint8_t vol[2];
356 struct streambuf buf;
357 } out;
358
359 /* properties */
360 uint32_t debug;
361 uint32_t buffer;
362 } USBAudioState;
363
364 static void output_callback(void *opaque, int avail)
365 {
366 USBAudioState *s = opaque;
367 uint8_t *data;
368
369 for (;;) {
370 if (avail < USBAUDIO_PACKET_SIZE) {
371 return;
372 }
373 data = streambuf_get(&s->out.buf);
374 if (NULL == data) {
375 return;
376 }
377 AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE);
378 avail -= USBAUDIO_PACKET_SIZE;
379 }
380 }
381
382 static int usb_audio_set_output_altset(USBAudioState *s, int altset)
383 {
384 switch (altset) {
385 case ALTSET_OFF:
386 streambuf_init(&s->out.buf, s->buffer);
387 AUD_set_active_out(s->out.voice, false);
388 break;
389 case ALTSET_ON:
390 AUD_set_active_out(s->out.voice, true);
391 break;
392 default:
393 return -1;
394 }
395
396 if (s->debug) {
397 fprintf(stderr, "usb-audio: set interface %d\n", altset);
398 }
399 s->out.altset = altset;
400 return 0;
401 }
402
403 /*
404 * Note: we arbitrarily map the volume control range onto -inf..+8 dB
405 */
406 #define ATTRIB_ID(cs, attrib, idif) \
407 (((cs) << 24) | ((attrib) << 16) | (idif))
408
409 static int usb_audio_get_control(USBAudioState *s, uint8_t attrib,
410 uint16_t cscn, uint16_t idif,
411 int length, uint8_t *data)
412 {
413 uint8_t cs = cscn >> 8;
414 uint8_t cn = cscn - 1; /* -1 for the non-present master control */
415 uint32_t aid = ATTRIB_ID(cs, attrib, idif);
416 int ret = USB_RET_STALL;
417
418 switch (aid) {
419 case ATTRIB_ID(MUTE_CONTROL, CR_GET_CUR, 0x0200):
420 data[0] = s->out.mute;
421 ret = 1;
422 break;
423 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_CUR, 0x0200):
424 if (cn < 2) {
425 uint16_t vol = (s->out.vol[cn] * 0x8800 + 127) / 255 + 0x8000;
426 data[0] = vol;
427 data[1] = vol >> 8;
428 ret = 2;
429 }
430 break;
431 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MIN, 0x0200):
432 if (cn < 2) {
433 data[0] = 0x01;
434 data[1] = 0x80;
435 ret = 2;
436 }
437 break;
438 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MAX, 0x0200):
439 if (cn < 2) {
440 data[0] = 0x00;
441 data[1] = 0x08;
442 ret = 2;
443 }
444 break;
445 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_RES, 0x0200):
446 if (cn < 2) {
447 data[0] = 0x88;
448 data[1] = 0x00;
449 ret = 2;
450 }
451 break;
452 }
453
454 return ret;
455 }
456 static int usb_audio_set_control(USBAudioState *s, uint8_t attrib,
457 uint16_t cscn, uint16_t idif,
458 int length, uint8_t *data)
459 {
460 uint8_t cs = cscn >> 8;
461 uint8_t cn = cscn - 1; /* -1 for the non-present master control */
462 uint32_t aid = ATTRIB_ID(cs, attrib, idif);
463 int ret = USB_RET_STALL;
464 bool set_vol = false;
465
466 switch (aid) {
467 case ATTRIB_ID(MUTE_CONTROL, CR_SET_CUR, 0x0200):
468 s->out.mute = data[0] & 1;
469 set_vol = true;
470 ret = 0;
471 break;
472 case ATTRIB_ID(VOLUME_CONTROL, CR_SET_CUR, 0x0200):
473 if (cn < 2) {
474 uint16_t vol = data[0] + (data[1] << 8);
475
476 if (s->debug) {
477 fprintf(stderr, "usb-audio: vol %04x\n", (uint16_t)vol);
478 }
479
480 vol -= 0x8000;
481 vol = (vol * 255 + 0x4400) / 0x8800;
482 if (vol > 255) {
483 vol = 255;
484 }
485
486 s->out.vol[cn] = vol;
487 set_vol = true;
488 ret = 0;
489 }
490 break;
491 }
492
493 if (set_vol) {
494 if (s->debug) {
495 fprintf(stderr, "usb-audio: mute %d, lvol %3d, rvol %3d\n",
496 s->out.mute, s->out.vol[0], s->out.vol[1]);
497 }
498 AUD_set_volume_out(s->out.voice, s->out.mute,
499 s->out.vol[0], s->out.vol[1]);
500 }
501
502 return ret;
503 }
504
505 static void usb_audio_handle_control(USBDevice *dev, USBPacket *p,
506 int request, int value, int index,
507 int length, uint8_t *data)
508 {
509 USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
510 int ret = 0;
511
512 if (s->debug) {
513 fprintf(stderr, "usb-audio: control transaction: "
514 "request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n",
515 request, value, index, length);
516 }
517
518 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
519 if (ret >= 0) {
520 return;
521 }
522
523 switch (request) {
524 case ClassInterfaceRequest | CR_GET_CUR:
525 case ClassInterfaceRequest | CR_GET_MIN:
526 case ClassInterfaceRequest | CR_GET_MAX:
527 case ClassInterfaceRequest | CR_GET_RES:
528 ret = usb_audio_get_control(s, request & 0xff, value, index,
529 length, data);
530 if (ret < 0) {
531 if (s->debug) {
532 fprintf(stderr, "usb-audio: fail: get control\n");
533 }
534 goto fail;
535 }
536 p->actual_length = ret;
537 break;
538
539 case ClassInterfaceOutRequest | CR_SET_CUR:
540 case ClassInterfaceOutRequest | CR_SET_MIN:
541 case ClassInterfaceOutRequest | CR_SET_MAX:
542 case ClassInterfaceOutRequest | CR_SET_RES:
543 ret = usb_audio_set_control(s, request & 0xff, value, index,
544 length, data);
545 if (ret < 0) {
546 if (s->debug) {
547 fprintf(stderr, "usb-audio: fail: set control\n");
548 }
549 goto fail;
550 }
551 break;
552
553 default:
554 fail:
555 if (s->debug) {
556 fprintf(stderr, "usb-audio: failed control transaction: "
557 "request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n",
558 request, value, index, length);
559 }
560 p->status = USB_RET_STALL;
561 break;
562 }
563 }
564
565 static void usb_audio_set_interface(USBDevice *dev, int iface,
566 int old, int value)
567 {
568 USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
569
570 if (iface == 1) {
571 usb_audio_set_output_altset(s, value);
572 }
573 }
574
575 static void usb_audio_handle_reset(USBDevice *dev)
576 {
577 USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
578
579 if (s->debug) {
580 fprintf(stderr, "usb-audio: reset\n");
581 }
582 usb_audio_set_output_altset(s, ALTSET_OFF);
583 }
584
585 static void usb_audio_handle_dataout(USBAudioState *s, USBPacket *p)
586 {
587 if (s->out.altset == ALTSET_OFF) {
588 p->status = USB_RET_STALL;
589 return;
590 }
591
592 streambuf_put(&s->out.buf, p);
593 if (p->actual_length < p->iov.size && s->debug > 1) {
594 fprintf(stderr, "usb-audio: output overrun (%zd bytes)\n",
595 p->iov.size - p->actual_length);
596 }
597 }
598
599 static void usb_audio_handle_data(USBDevice *dev, USBPacket *p)
600 {
601 USBAudioState *s = (USBAudioState *) dev;
602
603 if (p->pid == USB_TOKEN_OUT && p->ep->nr == 1) {
604 usb_audio_handle_dataout(s, p);
605 return;
606 }
607
608 p->status = USB_RET_STALL;
609 if (s->debug) {
610 fprintf(stderr, "usb-audio: failed data transaction: "
611 "pid 0x%x ep 0x%x len 0x%zx\n",
612 p->pid, p->ep->nr, p->iov.size);
613 }
614 }
615
616 static void usb_audio_handle_destroy(USBDevice *dev)
617 {
618 USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
619
620 if (s->debug) {
621 fprintf(stderr, "usb-audio: destroy\n");
622 }
623
624 usb_audio_set_output_altset(s, ALTSET_OFF);
625 AUD_close_out(&s->card, s->out.voice);
626 AUD_remove_card(&s->card);
627
628 streambuf_fini(&s->out.buf);
629 }
630
631 static int usb_audio_initfn(USBDevice *dev)
632 {
633 USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
634
635 usb_desc_create_serial(dev);
636 usb_desc_init(dev);
637 s->dev.opaque = s;
638 AUD_register_card("usb-audio", &s->card);
639
640 s->out.altset = ALTSET_OFF;
641 s->out.mute = false;
642 s->out.vol[0] = 240; /* 0 dB */
643 s->out.vol[1] = 240; /* 0 dB */
644 s->out.as.freq = USBAUDIO_SAMPLE_RATE;
645 s->out.as.nchannels = 2;
646 s->out.as.fmt = AUD_FMT_S16;
647 s->out.as.endianness = 0;
648 streambuf_init(&s->out.buf, s->buffer);
649
650 s->out.voice = AUD_open_out(&s->card, s->out.voice, "usb-audio",
651 s, output_callback, &s->out.as);
652 AUD_set_volume_out(s->out.voice, s->out.mute, s->out.vol[0], s->out.vol[1]);
653 AUD_set_active_out(s->out.voice, 0);
654 return 0;
655 }
656
657 static const VMStateDescription vmstate_usb_audio = {
658 .name = "usb-audio",
659 .unmigratable = 1,
660 };
661
662 static Property usb_audio_properties[] = {
663 DEFINE_PROP_UINT32("debug", USBAudioState, debug, 0),
664 DEFINE_PROP_UINT32("buffer", USBAudioState, buffer,
665 8 * USBAUDIO_PACKET_SIZE),
666 DEFINE_PROP_END_OF_LIST(),
667 };
668
669 static void usb_audio_class_init(ObjectClass *klass, void *data)
670 {
671 DeviceClass *dc = DEVICE_CLASS(klass);
672 USBDeviceClass *k = USB_DEVICE_CLASS(klass);
673
674 dc->vmsd = &vmstate_usb_audio;
675 dc->props = usb_audio_properties;
676 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
677 k->product_desc = "QEMU USB Audio Interface";
678 k->usb_desc = &desc_audio;
679 k->init = usb_audio_initfn;
680 k->handle_reset = usb_audio_handle_reset;
681 k->handle_control = usb_audio_handle_control;
682 k->handle_data = usb_audio_handle_data;
683 k->handle_destroy = usb_audio_handle_destroy;
684 k->set_interface = usb_audio_set_interface;
685 }
686
687 static const TypeInfo usb_audio_info = {
688 .name = "usb-audio",
689 .parent = TYPE_USB_DEVICE,
690 .instance_size = sizeof(USBAudioState),
691 .class_init = usb_audio_class_init,
692 };
693
694 static void usb_audio_register_types(void)
695 {
696 type_register_static(&usb_audio_info);
697 usb_legacy_register("usb-audio", "audio", NULL);
698 }
699
700 type_init(usb_audio_register_types)
QEMU modified to work with kvm