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 = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER, 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 (!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 void usb_audio_realize(USBDevice *dev, Error **errp) 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 } 655 656 static const VMStateDescription vmstate_usb_audio = { 657 .name = "usb-audio", 658 .unmigratable = 1, 659 }; 660 661 static Property usb_audio_properties[] = { 662 DEFINE_PROP_UINT32("debug", USBAudioState, debug, 0), 663 DEFINE_PROP_UINT32("buffer", USBAudioState, buffer, 664 8 * USBAUDIO_PACKET_SIZE), 665 DEFINE_PROP_END_OF_LIST(), 666 }; 667 668 static void usb_audio_class_init(ObjectClass *klass, void *data) 669 { 670 DeviceClass *dc = DEVICE_CLASS(klass); 671 USBDeviceClass *k = USB_DEVICE_CLASS(klass); 672 673 dc->vmsd = &vmstate_usb_audio; 674 dc->props = usb_audio_properties; 675 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 676 k->product_desc = "QEMU USB Audio Interface"; 677 k->usb_desc = &desc_audio; 678 k->realize = usb_audio_realize; 679 k->handle_reset = usb_audio_handle_reset; 680 k->handle_control = usb_audio_handle_control; 681 k->handle_data = usb_audio_handle_data; 682 k->handle_destroy = usb_audio_handle_destroy; 683 k->set_interface = usb_audio_set_interface; 684 } 685 686 static const TypeInfo usb_audio_info = { 687 .name = "usb-audio", 688 .parent = TYPE_USB_DEVICE, 689 .instance_size = sizeof(USBAudioState), 690 .class_init = usb_audio_class_init, 691 }; 692 693 static void usb_audio_register_types(void) 694 { 695 type_register_static(&usb_audio_info); 696 usb_legacy_register("usb-audio", "audio", NULL); 697 } 698 699 type_init(usb_audio_register_types) 700