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 #define TYPE_USB_AUDIO "usb-audio" 365 #define USB_AUDIO(obj) OBJECT_CHECK(USBAudioState, (obj), TYPE_USB_AUDIO) 366 367 static void output_callback(void *opaque, int avail) 368 { 369 USBAudioState *s = opaque; 370 uint8_t *data; 371 372 for (;;) { 373 if (avail < USBAUDIO_PACKET_SIZE) { 374 return; 375 } 376 data = streambuf_get(&s->out.buf); 377 if (!data) { 378 return; 379 } 380 AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE); 381 avail -= USBAUDIO_PACKET_SIZE; 382 } 383 } 384 385 static int usb_audio_set_output_altset(USBAudioState *s, int altset) 386 { 387 switch (altset) { 388 case ALTSET_OFF: 389 streambuf_init(&s->out.buf, s->buffer); 390 AUD_set_active_out(s->out.voice, false); 391 break; 392 case ALTSET_ON: 393 AUD_set_active_out(s->out.voice, true); 394 break; 395 default: 396 return -1; 397 } 398 399 if (s->debug) { 400 fprintf(stderr, "usb-audio: set interface %d\n", altset); 401 } 402 s->out.altset = altset; 403 return 0; 404 } 405 406 /* 407 * Note: we arbitrarily map the volume control range onto -inf..+8 dB 408 */ 409 #define ATTRIB_ID(cs, attrib, idif) \ 410 (((cs) << 24) | ((attrib) << 16) | (idif)) 411 412 static int usb_audio_get_control(USBAudioState *s, uint8_t attrib, 413 uint16_t cscn, uint16_t idif, 414 int length, uint8_t *data) 415 { 416 uint8_t cs = cscn >> 8; 417 uint8_t cn = cscn - 1; /* -1 for the non-present master control */ 418 uint32_t aid = ATTRIB_ID(cs, attrib, idif); 419 int ret = USB_RET_STALL; 420 421 switch (aid) { 422 case ATTRIB_ID(MUTE_CONTROL, CR_GET_CUR, 0x0200): 423 data[0] = s->out.mute; 424 ret = 1; 425 break; 426 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_CUR, 0x0200): 427 if (cn < 2) { 428 uint16_t vol = (s->out.vol[cn] * 0x8800 + 127) / 255 + 0x8000; 429 data[0] = vol; 430 data[1] = vol >> 8; 431 ret = 2; 432 } 433 break; 434 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MIN, 0x0200): 435 if (cn < 2) { 436 data[0] = 0x01; 437 data[1] = 0x80; 438 ret = 2; 439 } 440 break; 441 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MAX, 0x0200): 442 if (cn < 2) { 443 data[0] = 0x00; 444 data[1] = 0x08; 445 ret = 2; 446 } 447 break; 448 case ATTRIB_ID(VOLUME_CONTROL, CR_GET_RES, 0x0200): 449 if (cn < 2) { 450 data[0] = 0x88; 451 data[1] = 0x00; 452 ret = 2; 453 } 454 break; 455 } 456 457 return ret; 458 } 459 static int usb_audio_set_control(USBAudioState *s, uint8_t attrib, 460 uint16_t cscn, uint16_t idif, 461 int length, uint8_t *data) 462 { 463 uint8_t cs = cscn >> 8; 464 uint8_t cn = cscn - 1; /* -1 for the non-present master control */ 465 uint32_t aid = ATTRIB_ID(cs, attrib, idif); 466 int ret = USB_RET_STALL; 467 bool set_vol = false; 468 469 switch (aid) { 470 case ATTRIB_ID(MUTE_CONTROL, CR_SET_CUR, 0x0200): 471 s->out.mute = data[0] & 1; 472 set_vol = true; 473 ret = 0; 474 break; 475 case ATTRIB_ID(VOLUME_CONTROL, CR_SET_CUR, 0x0200): 476 if (cn < 2) { 477 uint16_t vol = data[0] + (data[1] << 8); 478 479 if (s->debug) { 480 fprintf(stderr, "usb-audio: vol %04x\n", (uint16_t)vol); 481 } 482 483 vol -= 0x8000; 484 vol = (vol * 255 + 0x4400) / 0x8800; 485 if (vol > 255) { 486 vol = 255; 487 } 488 489 s->out.vol[cn] = vol; 490 set_vol = true; 491 ret = 0; 492 } 493 break; 494 } 495 496 if (set_vol) { 497 if (s->debug) { 498 fprintf(stderr, "usb-audio: mute %d, lvol %3d, rvol %3d\n", 499 s->out.mute, s->out.vol[0], s->out.vol[1]); 500 } 501 AUD_set_volume_out(s->out.voice, s->out.mute, 502 s->out.vol[0], s->out.vol[1]); 503 } 504 505 return ret; 506 } 507 508 static void usb_audio_handle_control(USBDevice *dev, USBPacket *p, 509 int request, int value, int index, 510 int length, uint8_t *data) 511 { 512 USBAudioState *s = USB_AUDIO(dev); 513 int ret = 0; 514 515 if (s->debug) { 516 fprintf(stderr, "usb-audio: control transaction: " 517 "request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n", 518 request, value, index, length); 519 } 520 521 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 522 if (ret >= 0) { 523 return; 524 } 525 526 switch (request) { 527 case ClassInterfaceRequest | CR_GET_CUR: 528 case ClassInterfaceRequest | CR_GET_MIN: 529 case ClassInterfaceRequest | CR_GET_MAX: 530 case ClassInterfaceRequest | CR_GET_RES: 531 ret = usb_audio_get_control(s, request & 0xff, value, index, 532 length, data); 533 if (ret < 0) { 534 if (s->debug) { 535 fprintf(stderr, "usb-audio: fail: get control\n"); 536 } 537 goto fail; 538 } 539 p->actual_length = ret; 540 break; 541 542 case ClassInterfaceOutRequest | CR_SET_CUR: 543 case ClassInterfaceOutRequest | CR_SET_MIN: 544 case ClassInterfaceOutRequest | CR_SET_MAX: 545 case ClassInterfaceOutRequest | CR_SET_RES: 546 ret = usb_audio_set_control(s, request & 0xff, value, index, 547 length, data); 548 if (ret < 0) { 549 if (s->debug) { 550 fprintf(stderr, "usb-audio: fail: set control\n"); 551 } 552 goto fail; 553 } 554 break; 555 556 default: 557 fail: 558 if (s->debug) { 559 fprintf(stderr, "usb-audio: failed control transaction: " 560 "request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n", 561 request, value, index, length); 562 } 563 p->status = USB_RET_STALL; 564 break; 565 } 566 } 567 568 static void usb_audio_set_interface(USBDevice *dev, int iface, 569 int old, int value) 570 { 571 USBAudioState *s = USB_AUDIO(dev); 572 573 if (iface == 1) { 574 usb_audio_set_output_altset(s, value); 575 } 576 } 577 578 static void usb_audio_handle_reset(USBDevice *dev) 579 { 580 USBAudioState *s = USB_AUDIO(dev); 581 582 if (s->debug) { 583 fprintf(stderr, "usb-audio: reset\n"); 584 } 585 usb_audio_set_output_altset(s, ALTSET_OFF); 586 } 587 588 static void usb_audio_handle_dataout(USBAudioState *s, USBPacket *p) 589 { 590 if (s->out.altset == ALTSET_OFF) { 591 p->status = USB_RET_STALL; 592 return; 593 } 594 595 streambuf_put(&s->out.buf, p); 596 if (p->actual_length < p->iov.size && s->debug > 1) { 597 fprintf(stderr, "usb-audio: output overrun (%zd bytes)\n", 598 p->iov.size - p->actual_length); 599 } 600 } 601 602 static void usb_audio_handle_data(USBDevice *dev, USBPacket *p) 603 { 604 USBAudioState *s = (USBAudioState *) dev; 605 606 if (p->pid == USB_TOKEN_OUT && p->ep->nr == 1) { 607 usb_audio_handle_dataout(s, p); 608 return; 609 } 610 611 p->status = USB_RET_STALL; 612 if (s->debug) { 613 fprintf(stderr, "usb-audio: failed data transaction: " 614 "pid 0x%x ep 0x%x len 0x%zx\n", 615 p->pid, p->ep->nr, p->iov.size); 616 } 617 } 618 619 static void usb_audio_handle_destroy(USBDevice *dev) 620 { 621 USBAudioState *s = USB_AUDIO(dev); 622 623 if (s->debug) { 624 fprintf(stderr, "usb-audio: destroy\n"); 625 } 626 627 usb_audio_set_output_altset(s, ALTSET_OFF); 628 AUD_close_out(&s->card, s->out.voice); 629 AUD_remove_card(&s->card); 630 631 streambuf_fini(&s->out.buf); 632 } 633 634 static void usb_audio_realize(USBDevice *dev, Error **errp) 635 { 636 USBAudioState *s = USB_AUDIO(dev); 637 638 usb_desc_create_serial(dev); 639 usb_desc_init(dev); 640 s->dev.opaque = s; 641 AUD_register_card(TYPE_USB_AUDIO, &s->card); 642 643 s->out.altset = ALTSET_OFF; 644 s->out.mute = false; 645 s->out.vol[0] = 240; /* 0 dB */ 646 s->out.vol[1] = 240; /* 0 dB */ 647 s->out.as.freq = USBAUDIO_SAMPLE_RATE; 648 s->out.as.nchannels = 2; 649 s->out.as.fmt = AUD_FMT_S16; 650 s->out.as.endianness = 0; 651 streambuf_init(&s->out.buf, s->buffer); 652 653 s->out.voice = AUD_open_out(&s->card, s->out.voice, TYPE_USB_AUDIO, 654 s, output_callback, &s->out.as); 655 AUD_set_volume_out(s->out.voice, s->out.mute, s->out.vol[0], s->out.vol[1]); 656 AUD_set_active_out(s->out.voice, 0); 657 } 658 659 static const VMStateDescription vmstate_usb_audio = { 660 .name = TYPE_USB_AUDIO, 661 .unmigratable = 1, 662 }; 663 664 static Property usb_audio_properties[] = { 665 DEFINE_PROP_UINT32("debug", USBAudioState, debug, 0), 666 DEFINE_PROP_UINT32("buffer", USBAudioState, buffer, 667 32 * USBAUDIO_PACKET_SIZE), 668 DEFINE_PROP_END_OF_LIST(), 669 }; 670 671 static void usb_audio_class_init(ObjectClass *klass, void *data) 672 { 673 DeviceClass *dc = DEVICE_CLASS(klass); 674 USBDeviceClass *k = USB_DEVICE_CLASS(klass); 675 676 dc->vmsd = &vmstate_usb_audio; 677 dc->props = usb_audio_properties; 678 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 679 k->product_desc = "QEMU USB Audio Interface"; 680 k->usb_desc = &desc_audio; 681 k->realize = usb_audio_realize; 682 k->handle_reset = usb_audio_handle_reset; 683 k->handle_control = usb_audio_handle_control; 684 k->handle_data = usb_audio_handle_data; 685 k->handle_destroy = usb_audio_handle_destroy; 686 k->set_interface = usb_audio_set_interface; 687 } 688 689 static const TypeInfo usb_audio_info = { 690 .name = TYPE_USB_AUDIO, 691 .parent = TYPE_USB_DEVICE, 692 .instance_size = sizeof(USBAudioState), 693 .class_init = usb_audio_class_init, 694 }; 695 696 static void usb_audio_register_types(void) 697 { 698 type_register_static(&usb_audio_info); 699 usb_legacy_register(TYPE_USB_AUDIO, "audio", NULL); 700 } 701 702 type_init(usb_audio_register_types) 703