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/osdep.h" 33 #include "qemu/module.h" 34 #include "hw/qdev-properties.h" 35 #include "hw/usb.h" 36 #include "migration/vmstate.h" 37 #include "desc.h" 38 #include "audio/audio.h" 39 40 #define USBAUDIO_VENDOR_NUM 0x46f4 /* CRC16() of "QEMU" */ 41 #define USBAUDIO_PRODUCT_NUM 0x0002 42 43 #define DEV_CONFIG_VALUE 1 /* The one and only */ 44 45 /* Descriptor subtypes for AC interfaces */ 46 #define DST_AC_HEADER 1 47 #define DST_AC_INPUT_TERMINAL 2 48 #define DST_AC_OUTPUT_TERMINAL 3 49 #define DST_AC_FEATURE_UNIT 6 50 /* Descriptor subtypes for AS interfaces */ 51 #define DST_AS_GENERAL 1 52 #define DST_AS_FORMAT_TYPE 2 53 /* Descriptor subtypes for endpoints */ 54 #define DST_EP_GENERAL 1 55 56 enum usb_audio_strings { 57 STRING_NULL, 58 STRING_MANUFACTURER, 59 STRING_PRODUCT, 60 STRING_SERIALNUMBER, 61 STRING_CONFIG, 62 STRING_USBAUDIO_CONTROL, 63 STRING_INPUT_TERMINAL, 64 STRING_FEATURE_UNIT, 65 STRING_OUTPUT_TERMINAL, 66 STRING_NULL_STREAM, 67 STRING_REAL_STREAM, 68 }; 69 70 static const USBDescStrings usb_audio_stringtable = { 71 [STRING_MANUFACTURER] = "QEMU", 72 [STRING_PRODUCT] = "QEMU USB Audio", 73 [STRING_SERIALNUMBER] = "1", 74 [STRING_CONFIG] = "Audio Configuration", 75 [STRING_USBAUDIO_CONTROL] = "Audio Device", 76 [STRING_INPUT_TERMINAL] = "Audio Output Pipe", 77 [STRING_FEATURE_UNIT] = "Audio Output Volume Control", 78 [STRING_OUTPUT_TERMINAL] = "Audio Output Terminal", 79 [STRING_NULL_STREAM] = "Audio Output - Disabled", 80 [STRING_REAL_STREAM] = "Audio Output - 48 kHz Stereo", 81 }; 82 83 #define U16(x) ((x) & 0xff), (((x) >> 8) & 0xff) 84 #define U24(x) U16(x), (((x) >> 16) & 0xff) 85 #define U32(x) U24(x), (((x) >> 24) & 0xff) 86 87 /* 88 * A Basic Audio Device uses these specific values 89 */ 90 #define USBAUDIO_PACKET_SIZE 192 91 #define USBAUDIO_SAMPLE_RATE 48000 92 #define USBAUDIO_PACKET_INTERVAL 1 93 94 static const USBDescIface desc_iface[] = { 95 { 96 .bInterfaceNumber = 0, 97 .bNumEndpoints = 0, 98 .bInterfaceClass = USB_CLASS_AUDIO, 99 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL, 100 .bInterfaceProtocol = 0x04, 101 .iInterface = STRING_USBAUDIO_CONTROL, 102 .ndesc = 4, 103 .descs = (USBDescOther[]) { 104 { 105 /* Headphone Class-Specific AC Interface Header Descriptor */ 106 .data = (uint8_t[]) { 107 0x09, /* u8 bLength */ 108 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */ 109 DST_AC_HEADER, /* u8 bDescriptorSubtype */ 110 U16(0x0100), /* u16 bcdADC */ 111 U16(0x2b), /* u16 wTotalLength */ 112 0x01, /* u8 bInCollection */ 113 0x01, /* u8 baInterfaceNr */ 114 } 115 },{ 116 /* Generic Stereo Input Terminal ID1 Descriptor */ 117 .data = (uint8_t[]) { 118 0x0c, /* u8 bLength */ 119 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */ 120 DST_AC_INPUT_TERMINAL, /* u8 bDescriptorSubtype */ 121 0x01, /* u8 bTerminalID */ 122 U16(0x0101), /* u16 wTerminalType */ 123 0x00, /* u8 bAssocTerminal */ 124 0x02, /* u16 bNrChannels */ 125 U16(0x0003), /* u16 wChannelConfig */ 126 0x00, /* u8 iChannelNames */ 127 STRING_INPUT_TERMINAL, /* u8 iTerminal */ 128 } 129 },{ 130 /* Generic Stereo Feature Unit ID2 Descriptor */ 131 .data = (uint8_t[]) { 132 0x0d, /* u8 bLength */ 133 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */ 134 DST_AC_FEATURE_UNIT, /* u8 bDescriptorSubtype */ 135 0x02, /* u8 bUnitID */ 136 0x01, /* u8 bSourceID */ 137 0x02, /* u8 bControlSize */ 138 U16(0x0001), /* u16 bmaControls(0) */ 139 U16(0x0002), /* u16 bmaControls(1) */ 140 U16(0x0002), /* u16 bmaControls(2) */ 141 STRING_FEATURE_UNIT, /* u8 iFeature */ 142 } 143 },{ 144 /* Headphone Ouptut Terminal ID3 Descriptor */ 145 .data = (uint8_t[]) { 146 0x09, /* u8 bLength */ 147 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */ 148 DST_AC_OUTPUT_TERMINAL, /* u8 bDescriptorSubtype */ 149 0x03, /* u8 bUnitID */ 150 U16(0x0301), /* u16 wTerminalType (SPK) */ 151 0x00, /* u8 bAssocTerminal */ 152 0x02, /* u8 bSourceID */ 153 STRING_OUTPUT_TERMINAL, /* u8 iTerminal */ 154 } 155 } 156 }, 157 },{ 158 .bInterfaceNumber = 1, 159 .bAlternateSetting = 0, 160 .bNumEndpoints = 0, 161 .bInterfaceClass = USB_CLASS_AUDIO, 162 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING, 163 .iInterface = STRING_NULL_STREAM, 164 },{ 165 .bInterfaceNumber = 1, 166 .bAlternateSetting = 1, 167 .bNumEndpoints = 1, 168 .bInterfaceClass = USB_CLASS_AUDIO, 169 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING, 170 .iInterface = STRING_REAL_STREAM, 171 .ndesc = 2, 172 .descs = (USBDescOther[]) { 173 { 174 /* Headphone Class-specific AS General Interface Descriptor */ 175 .data = (uint8_t[]) { 176 0x07, /* u8 bLength */ 177 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */ 178 DST_AS_GENERAL, /* u8 bDescriptorSubtype */ 179 0x01, /* u8 bTerminalLink */ 180 0x00, /* u8 bDelay */ 181 0x01, 0x00, /* u16 wFormatTag */ 182 } 183 },{ 184 /* Headphone Type I Format Type Descriptor */ 185 .data = (uint8_t[]) { 186 0x0b, /* u8 bLength */ 187 USB_DT_CS_INTERFACE, /* u8 bDescriptorType */ 188 DST_AS_FORMAT_TYPE, /* u8 bDescriptorSubtype */ 189 0x01, /* u8 bFormatType */ 190 0x02, /* u8 bNrChannels */ 191 0x02, /* u8 bSubFrameSize */ 192 0x10, /* u8 bBitResolution */ 193 0x01, /* u8 bSamFreqType */ 194 U24(USBAUDIO_SAMPLE_RATE), /* u24 tSamFreq */ 195 } 196 } 197 }, 198 .eps = (USBDescEndpoint[]) { 199 { 200 .bEndpointAddress = USB_DIR_OUT | 0x01, 201 .bmAttributes = 0x0d, 202 .wMaxPacketSize = USBAUDIO_PACKET_SIZE, 203 .bInterval = 1, 204 .is_audio = 1, 205 /* Stereo Headphone Class-specific 206 AS Audio Data Endpoint Descriptor */ 207 .extra = (uint8_t[]) { 208 0x07, /* u8 bLength */ 209 USB_DT_CS_ENDPOINT, /* u8 bDescriptorType */ 210 DST_EP_GENERAL, /* u8 bDescriptorSubtype */ 211 0x00, /* u8 bmAttributes */ 212 0x00, /* u8 bLockDelayUnits */ 213 U16(0x0000), /* u16 wLockDelay */ 214 }, 215 }, 216 } 217 } 218 }; 219 220 static const USBDescDevice desc_device = { 221 .bcdUSB = 0x0100, 222 .bMaxPacketSize0 = 64, 223 .bNumConfigurations = 1, 224 .confs = (USBDescConfig[]) { 225 { 226 .bNumInterfaces = 2, 227 .bConfigurationValue = DEV_CONFIG_VALUE, 228 .iConfiguration = STRING_CONFIG, 229 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER, 230 .bMaxPower = 0x32, 231 .nif = ARRAY_SIZE(desc_iface), 232 .ifs = desc_iface, 233 }, 234 }, 235 }; 236 237 static const USBDesc desc_audio = { 238 .id = { 239 .idVendor = USBAUDIO_VENDOR_NUM, 240 .idProduct = USBAUDIO_PRODUCT_NUM, 241 .bcdDevice = 0, 242 .iManufacturer = STRING_MANUFACTURER, 243 .iProduct = STRING_PRODUCT, 244 .iSerialNumber = STRING_SERIALNUMBER, 245 }, 246 .full = &desc_device, 247 .str = usb_audio_stringtable, 248 }; 249 250 /* 251 * A USB audio device supports an arbitrary number of alternate 252 * interface settings for each interface. Each corresponds to a block 253 * diagram of parameterized blocks. This can thus refer to things like 254 * number of channels, data rates, or in fact completely different 255 * block diagrams. Alternative setting 0 is always the null block diagram, 256 * which is used by a disabled device. 257 */ 258 enum usb_audio_altset { 259 ALTSET_OFF = 0x00, /* No endpoint */ 260 ALTSET_ON = 0x01, /* Single endpoint */ 261 }; 262 263 /* 264 * Class-specific control requests 265 */ 266 #define CR_SET_CUR 0x01 267 #define CR_GET_CUR 0x81 268 #define CR_SET_MIN 0x02 269 #define CR_GET_MIN 0x82 270 #define CR_SET_MAX 0x03 271 #define CR_GET_MAX 0x83 272 #define CR_SET_RES 0x04 273 #define CR_GET_RES 0x84 274 #define CR_SET_MEM 0x05 275 #define CR_GET_MEM 0x85 276 #define CR_GET_STAT 0xff 277 278 /* 279 * Feature Unit Control Selectors 280 */ 281 #define MUTE_CONTROL 0x01 282 #define VOLUME_CONTROL 0x02 283 #define BASS_CONTROL 0x03 284 #define MID_CONTROL 0x04 285 #define TREBLE_CONTROL 0x05 286 #define GRAPHIC_EQUALIZER_CONTROL 0x06 287 #define AUTOMATIC_GAIN_CONTROL 0x07 288 #define DELAY_CONTROL 0x08 289 #define BASS_BOOST_CONTROL 0x09 290 #define LOUDNESS_CONTROL 0x0a 291 292 /* 293 * buffering 294 */ 295 296 struct streambuf { 297 uint8_t *data; 298 uint32_t size; 299 uint32_t prod; 300 uint32_t cons; 301 }; 302 303 static void streambuf_init(struct streambuf *buf, uint32_t size) 304 { 305 g_free(buf->data); 306 buf->size = size - (size % USBAUDIO_PACKET_SIZE); 307 buf->data = g_malloc(buf->size); 308 buf->prod = 0; 309 buf->cons = 0; 310 } 311 312 static void streambuf_fini(struct streambuf *buf) 313 { 314 g_free(buf->data); 315 buf->data = NULL; 316 } 317 318 static int streambuf_put(struct streambuf *buf, USBPacket *p) 319 { 320 uint32_t free = buf->size - (buf->prod - buf->cons); 321 322 if (!free) { 323 return 0; 324 } 325 if (p->iov.size != USBAUDIO_PACKET_SIZE) { 326 return 0; 327 } 328 assert(free >= USBAUDIO_PACKET_SIZE); 329 usb_packet_copy(p, buf->data + (buf->prod % buf->size), 330 USBAUDIO_PACKET_SIZE); 331 buf->prod += USBAUDIO_PACKET_SIZE; 332 return USBAUDIO_PACKET_SIZE; 333 } 334 335 static uint8_t *streambuf_get(struct streambuf *buf) 336 { 337 uint32_t used = buf->prod - buf->cons; 338 uint8_t *data; 339 340 if (!used) { 341 return NULL; 342 } 343 assert(used >= USBAUDIO_PACKET_SIZE); 344 data = buf->data + (buf->cons % buf->size); 345 buf->cons += USBAUDIO_PACKET_SIZE; 346 return data; 347 } 348 349 typedef struct USBAudioState { 350 /* qemu interfaces */ 351 USBDevice dev; 352 QEMUSoundCard card; 353 354 /* state */ 355 struct { 356 enum usb_audio_altset altset; 357 struct audsettings as; 358 SWVoiceOut *voice; 359 bool mute; 360 uint8_t vol[2]; 361 struct streambuf buf; 362 } out; 363 364 /* properties */ 365 uint32_t debug; 366 uint32_t buffer; 367 } USBAudioState; 368 369 #define TYPE_USB_AUDIO "usb-audio" 370 #define USB_AUDIO(obj) OBJECT_CHECK(USBAudioState, (obj), TYPE_USB_AUDIO) 371 372 static void output_callback(void *opaque, int avail) 373 { 374 USBAudioState *s = opaque; 375 uint8_t *data; 376 377 for (;;) { 378 if (avail < USBAUDIO_PACKET_SIZE) { 379 return; 380 } 381 data = streambuf_get(&s->out.buf); 382 if (!data) { 383 return; 384 } 385 AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE); 386 avail -= USBAUDIO_PACKET_SIZE; 387 } 388 } 389 390 static int usb_audio_set_output_altset(USBAudioState *s, int altset) 391 { 392 switch (altset) { 393 case ALTSET_OFF: 394 streambuf_init(&s->out.buf, s->buffer); 395 AUD_set_active_out(s->out.voice, false); 396 break; 397 case ALTSET_ON: 398 AUD_set_active_out(s->out.voice, true); 399 break; 400 default: 401 return -1; 402 } 403 404 if (s->debug) { 405 fprintf(stderr, "usb-audio: set interface %d\n", altset); 406 } 407 s->out.altset = altset; 408 return 0; 409 } 410 411 /* 412 * Note: we arbitrarily map the volume control range onto -inf..+8 dB 413 */ 414 #define ATTRIB_ID(cs, attrib, idif) \ 415 (((cs) << 24) | ((attrib) << 16) | (idif)) 416 417 static int usb_audio_get_control(USBAudioState *s, uint8_t attrib, 418 uint16_t cscn, uint16_t idif, 419 int length, uint8_t *data) 420 { 421 uint8_t cs = cscn >> 8; 422 uint8_t cn = cscn - 1; /* -1 for the non-present master control */ 423 uint32_t aid = ATTRIB_ID(cs, attrib, idif); 424 int ret = USB_RET_STALL; 425 426 switch (aid) { 427 case ATTRIB_ID(MUTE_CONTROL, CR_GET_CUR, 0x0200): 428 data[0] = s->out.mute; 429 ret = 1; 430 break; 431 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_CUR, 0x0200): 432 if (cn < 2) { 433 uint16_t vol = (s->out.vol[cn] * 0x8800 + 127) / 255 + 0x8000; 434 data[0] = vol; 435 data[1] = vol >> 8; 436 ret = 2; 437 } 438 break; 439 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MIN, 0x0200): 440 if (cn < 2) { 441 data[0] = 0x01; 442 data[1] = 0x80; 443 ret = 2; 444 } 445 break; 446 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MAX, 0x0200): 447 if (cn < 2) { 448 data[0] = 0x00; 449 data[1] = 0x08; 450 ret = 2; 451 } 452 break; 453 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_RES, 0x0200): 454 if (cn < 2) { 455 data[0] = 0x88; 456 data[1] = 0x00; 457 ret = 2; 458 } 459 break; 460 } 461 462 return ret; 463 } 464 static int usb_audio_set_control(USBAudioState *s, uint8_t attrib, 465 uint16_t cscn, uint16_t idif, 466 int length, uint8_t *data) 467 { 468 uint8_t cs = cscn >> 8; 469 uint8_t cn = cscn - 1; /* -1 for the non-present master control */ 470 uint32_t aid = ATTRIB_ID(cs, attrib, idif); 471 int ret = USB_RET_STALL; 472 bool set_vol = false; 473 474 switch (aid) { 475 case ATTRIB_ID(MUTE_CONTROL, CR_SET_CUR, 0x0200): 476 s->out.mute = data[0] & 1; 477 set_vol = true; 478 ret = 0; 479 break; 480 case ATTRIB_ID(VOLUME_CONTROL, CR_SET_CUR, 0x0200): 481 if (cn < 2) { 482 uint16_t vol = data[0] + (data[1] << 8); 483 484 if (s->debug) { 485 fprintf(stderr, "usb-audio: vol %04x\n", (uint16_t)vol); 486 } 487 488 vol -= 0x8000; 489 vol = (vol * 255 + 0x4400) / 0x8800; 490 if (vol > 255) { 491 vol = 255; 492 } 493 494 s->out.vol[cn] = vol; 495 set_vol = true; 496 ret = 0; 497 } 498 break; 499 } 500 501 if (set_vol) { 502 if (s->debug) { 503 fprintf(stderr, "usb-audio: mute %d, lvol %3d, rvol %3d\n", 504 s->out.mute, s->out.vol[0], s->out.vol[1]); 505 } 506 AUD_set_volume_out(s->out.voice, s->out.mute, 507 s->out.vol[0], s->out.vol[1]); 508 } 509 510 return ret; 511 } 512 513 static void usb_audio_handle_control(USBDevice *dev, USBPacket *p, 514 int request, int value, int index, 515 int length, uint8_t *data) 516 { 517 USBAudioState *s = USB_AUDIO(dev); 518 int ret = 0; 519 520 if (s->debug) { 521 fprintf(stderr, "usb-audio: control transaction: " 522 "request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n", 523 request, value, index, length); 524 } 525 526 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 527 if (ret >= 0) { 528 return; 529 } 530 531 switch (request) { 532 case ClassInterfaceRequest | CR_GET_CUR: 533 case ClassInterfaceRequest | CR_GET_MIN: 534 case ClassInterfaceRequest | CR_GET_MAX: 535 case ClassInterfaceRequest | CR_GET_RES: 536 ret = usb_audio_get_control(s, request & 0xff, value, index, 537 length, data); 538 if (ret < 0) { 539 if (s->debug) { 540 fprintf(stderr, "usb-audio: fail: get control\n"); 541 } 542 goto fail; 543 } 544 p->actual_length = ret; 545 break; 546 547 case ClassInterfaceOutRequest | CR_SET_CUR: 548 case ClassInterfaceOutRequest | CR_SET_MIN: 549 case ClassInterfaceOutRequest | CR_SET_MAX: 550 case ClassInterfaceOutRequest | CR_SET_RES: 551 ret = usb_audio_set_control(s, request & 0xff, value, index, 552 length, data); 553 if (ret < 0) { 554 if (s->debug) { 555 fprintf(stderr, "usb-audio: fail: set control\n"); 556 } 557 goto fail; 558 } 559 break; 560 561 default: 562 fail: 563 if (s->debug) { 564 fprintf(stderr, "usb-audio: failed control transaction: " 565 "request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n", 566 request, value, index, length); 567 } 568 p->status = USB_RET_STALL; 569 break; 570 } 571 } 572 573 static void usb_audio_set_interface(USBDevice *dev, int iface, 574 int old, int value) 575 { 576 USBAudioState *s = USB_AUDIO(dev); 577 578 if (iface == 1) { 579 usb_audio_set_output_altset(s, value); 580 } 581 } 582 583 static void usb_audio_handle_reset(USBDevice *dev) 584 { 585 USBAudioState *s = USB_AUDIO(dev); 586 587 if (s->debug) { 588 fprintf(stderr, "usb-audio: reset\n"); 589 } 590 usb_audio_set_output_altset(s, ALTSET_OFF); 591 } 592 593 static void usb_audio_handle_dataout(USBAudioState *s, USBPacket *p) 594 { 595 if (s->out.altset == ALTSET_OFF) { 596 p->status = USB_RET_STALL; 597 return; 598 } 599 600 streambuf_put(&s->out.buf, p); 601 if (p->actual_length < p->iov.size && s->debug > 1) { 602 fprintf(stderr, "usb-audio: output overrun (%zd bytes)\n", 603 p->iov.size - p->actual_length); 604 } 605 } 606 607 static void usb_audio_handle_data(USBDevice *dev, USBPacket *p) 608 { 609 USBAudioState *s = (USBAudioState *) dev; 610 611 if (p->pid == USB_TOKEN_OUT && p->ep->nr == 1) { 612 usb_audio_handle_dataout(s, p); 613 return; 614 } 615 616 p->status = USB_RET_STALL; 617 if (s->debug) { 618 fprintf(stderr, "usb-audio: failed data transaction: " 619 "pid 0x%x ep 0x%x len 0x%zx\n", 620 p->pid, p->ep->nr, p->iov.size); 621 } 622 } 623 624 static void usb_audio_unrealize(USBDevice *dev, Error **errp) 625 { 626 USBAudioState *s = USB_AUDIO(dev); 627 628 if (s->debug) { 629 fprintf(stderr, "usb-audio: destroy\n"); 630 } 631 632 usb_audio_set_output_altset(s, ALTSET_OFF); 633 AUD_close_out(&s->card, s->out.voice); 634 AUD_remove_card(&s->card); 635 636 streambuf_fini(&s->out.buf); 637 } 638 639 static void usb_audio_realize(USBDevice *dev, Error **errp) 640 { 641 USBAudioState *s = USB_AUDIO(dev); 642 643 usb_desc_create_serial(dev); 644 usb_desc_init(dev); 645 s->dev.opaque = s; 646 AUD_register_card(TYPE_USB_AUDIO, &s->card); 647 648 s->out.altset = ALTSET_OFF; 649 s->out.mute = false; 650 s->out.vol[0] = 240; /* 0 dB */ 651 s->out.vol[1] = 240; /* 0 dB */ 652 s->out.as.freq = USBAUDIO_SAMPLE_RATE; 653 s->out.as.nchannels = 2; 654 s->out.as.fmt = AUDIO_FORMAT_S16; 655 s->out.as.endianness = 0; 656 streambuf_init(&s->out.buf, s->buffer); 657 658 s->out.voice = AUD_open_out(&s->card, s->out.voice, TYPE_USB_AUDIO, 659 s, output_callback, &s->out.as); 660 AUD_set_volume_out(s->out.voice, s->out.mute, s->out.vol[0], s->out.vol[1]); 661 AUD_set_active_out(s->out.voice, 0); 662 } 663 664 static const VMStateDescription vmstate_usb_audio = { 665 .name = TYPE_USB_AUDIO, 666 .unmigratable = 1, 667 }; 668 669 static Property usb_audio_properties[] = { 670 DEFINE_PROP_UINT32("debug", USBAudioState, debug, 0), 671 DEFINE_PROP_UINT32("buffer", USBAudioState, buffer, 672 32 * USBAUDIO_PACKET_SIZE), 673 DEFINE_PROP_END_OF_LIST(), 674 }; 675 676 static void usb_audio_class_init(ObjectClass *klass, void *data) 677 { 678 DeviceClass *dc = DEVICE_CLASS(klass); 679 USBDeviceClass *k = USB_DEVICE_CLASS(klass); 680 681 dc->vmsd = &vmstate_usb_audio; 682 dc->props = usb_audio_properties; 683 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 684 k->product_desc = "QEMU USB Audio Interface"; 685 k->usb_desc = &desc_audio; 686 k->realize = usb_audio_realize; 687 k->handle_reset = usb_audio_handle_reset; 688 k->handle_control = usb_audio_handle_control; 689 k->handle_data = usb_audio_handle_data; 690 k->unrealize = usb_audio_unrealize; 691 k->set_interface = usb_audio_set_interface; 692 } 693 694 static const TypeInfo usb_audio_info = { 695 .name = TYPE_USB_AUDIO, 696 .parent = TYPE_USB_DEVICE, 697 .instance_size = sizeof(USBAudioState), 698 .class_init = usb_audio_class_init, 699 }; 700 701 static void usb_audio_register_types(void) 702 { 703 type_register_static(&usb_audio_info); 704 usb_legacy_register(TYPE_USB_AUDIO, "audio", NULL); 705 } 706 707 type_init(usb_audio_register_types) 708