qapi/audio.json

   1 # -*- mode: python -*-
   2 # vim: filetype=python
   3 #
   4 # Copyright (C) 2015-2019 Zoltán Kővágó <DirtY.iCE.hu@gmail.com>
   5 #
   6 # This work is licensed under the terms of the GNU GPL, version 2 or later.
   7 # See the COPYING file in the top-level directory.
   8
   9 ##
  10 # = Audio
  11 ##
  12
  13 ##
  14 # @AudiodevPerDirectionOptions:
  15 #
  16 # General audio backend options that are used for both playback and
  17 # recording.
  18 #
  19 # @mixing-engine: use QEMU's mixing engine to mix all streams inside QEMU and
  20 #                 convert audio formats when not supported by the backend. When
  21 #                 set to off, fixed-settings must be also off (default on,
  22 #                 since 4.2)
  23 #
  24 # @fixed-settings: use fixed settings for host input/output. When off,
  25 #                  frequency, channels and format must not be
  26 #                  specified (default true)
  27 #
  28 # @frequency: frequency to use when using fixed settings
  29 #             (default 44100)
  30 #
  31 # @channels: number of channels when using fixed settings (default 2)
  32 #
  33 # @voices: number of voices to use (default 1)
  34 #
  35 # @format: sample format to use when using fixed settings
  36 #          (default s16)
  37 #
  38 # @buffer-length: the buffer length in microseconds
  39 #
  40 # Since: 4.0
  41 ##
  42 { 'struct': 'AudiodevPerDirectionOptions',
  43   'data': {
  44     '*mixing-engine':  'bool',
  45     '*fixed-settings': 'bool',
  46     '*frequency':      'uint32',
  47     '*channels':       'uint32',
  48     '*voices':         'uint32',
  49     '*format':         'AudioFormat',
  50     '*buffer-length':  'uint32' } }
  51
  52 ##
  53 # @AudiodevGenericOptions:
  54 #
  55 # Generic driver-specific options.
  56 #
  57 # @in: options of the capture stream
  58 #
  59 # @out: options of the playback stream
  60 #
  61 # Since: 4.0
  62 ##
  63 { 'struct': 'AudiodevGenericOptions',
  64   'data': {
  65     '*in':  'AudiodevPerDirectionOptions',
  66     '*out': 'AudiodevPerDirectionOptions' } }
  67
  68 ##
  69 # @AudiodevAlsaPerDirectionOptions:
  70 #
  71 # Options of the ALSA backend that are used for both playback and
  72 # recording.
  73 #
  74 # @dev: the name of the ALSA device to use (default 'default')
  75 #
  76 # @period-length: the period length in microseconds
  77 #
  78 # @try-poll: attempt to use poll mode, falling back to non-polling
  79 #            access on failure (default true)
  80 #
  81 # Since: 4.0
  82 ##
  83 { 'struct': 'AudiodevAlsaPerDirectionOptions',
  84   'base': 'AudiodevPerDirectionOptions',
  85   'data': {
  86     '*dev':           'str',
  87     '*period-length': 'uint32',
  88     '*try-poll':      'bool' } }
  89
  90 ##
  91 # @AudiodevAlsaOptions:
  92 #
  93 # Options of the ALSA audio backend.
  94 #
  95 # @in: options of the capture stream
  96 #
  97 # @out: options of the playback stream
  98 #
  99 # @threshold: set the threshold (in microseconds) when playback starts
 100 #
 101 # Since: 4.0
 102 ##
 103 { 'struct': 'AudiodevAlsaOptions',
 104   'data': {
 105     '*in':        'AudiodevAlsaPerDirectionOptions',
 106     '*out':       'AudiodevAlsaPerDirectionOptions',
 107     '*threshold': 'uint32' } }
 108
 109 ##
 110 # @AudiodevSndioOptions:
 111 #
 112 # Options of the sndio audio backend.
 113 #
 114 # @in: options of the capture stream
 115 #
 116 # @out: options of the playback stream
 117 #
 118 # @dev: the name of the sndio device to use (default 'default')
 119 #
 120 # @latency: play buffer size (in microseconds)
 121 #
 122 # Since: 7.2
 123 ##
 124 { 'struct': 'AudiodevSndioOptions',
 125   'data': {
 126     '*in':        'AudiodevPerDirectionOptions',
 127     '*out':       'AudiodevPerDirectionOptions',
 128     '*dev':       'str',
 129     '*latency':   'uint32'} }
 130
 131 ##
 132 # @AudiodevCoreaudioPerDirectionOptions:
 133 #
 134 # Options of the Core Audio backend that are used for both playback and
 135 # recording.
 136 #
 137 # @buffer-count: number of buffers
 138 #
 139 # Since: 4.0
 140 ##
 141 { 'struct': 'AudiodevCoreaudioPerDirectionOptions',
 142   'base': 'AudiodevPerDirectionOptions',
 143   'data': {
 144     '*buffer-count': 'uint32' } }
 145
 146 ##
 147 # @AudiodevCoreaudioOptions:
 148 #
 149 # Options of the coreaudio audio backend.
 150 #
 151 # @in: options of the capture stream
 152 #
 153 # @out: options of the playback stream
 154 #
 155 # Since: 4.0
 156 ##
 157 { 'struct': 'AudiodevCoreaudioOptions',
 158   'data': {
 159     '*in':  'AudiodevCoreaudioPerDirectionOptions',
 160     '*out': 'AudiodevCoreaudioPerDirectionOptions' } }
 161
 162 ##
 163 # @AudiodevDsoundOptions:
 164 #
 165 # Options of the DirectSound audio backend.
 166 #
 167 # @in: options of the capture stream
 168 #
 169 # @out: options of the playback stream
 170 #
 171 # @latency: add extra latency to playback in microseconds
 172 #           (default 10000)
 173 #
 174 # Since: 4.0
 175 ##
 176 { 'struct': 'AudiodevDsoundOptions',
 177   'data': {
 178     '*in':      'AudiodevPerDirectionOptions',
 179     '*out':     'AudiodevPerDirectionOptions',
 180     '*latency': 'uint32' } }
 181
 182 ##
 183 # @AudiodevJackPerDirectionOptions:
 184 #
 185 # Options of the JACK backend that are used for both playback and
 186 # recording.
 187 #
 188 # @server-name: select from among several possible concurrent server instances
 189 #               (default: environment variable $JACK_DEFAULT_SERVER if set, else "default")
 190 #
 191 # @client-name: the client name to use. The server will modify this name to
 192 #               create a unique variant, if needed unless @exact-name is true (default: the
 193 #               guest's name)
 194 #
 195 # @connect-ports: if set, a regular expression of JACK client port name(s) to
 196 #                 monitor for and automatically connect to
 197 #
 198 # @start-server: start a jack server process if one is not already present
 199 #                (default: false)
 200 #
 201 # @exact-name: use the exact name requested otherwise JACK automatically
 202 #              generates a unique one, if needed (default: false)
 203 #
 204 # Since: 5.1
 205 ##
 206 { 'struct': 'AudiodevJackPerDirectionOptions',
 207   'base': 'AudiodevPerDirectionOptions',
 208   'data': {
 209     '*server-name':   'str',
 210     '*client-name':   'str',
 211     '*connect-ports': 'str',
 212     '*start-server':  'bool',
 213     '*exact-name':    'bool' } }
 214
 215 ##
 216 # @AudiodevJackOptions:
 217 #
 218 # Options of the JACK audio backend.
 219 #
 220 # @in: options of the capture stream
 221 #
 222 # @out: options of the playback stream
 223 #
 224 # Since: 5.1
 225 ##
 226 { 'struct': 'AudiodevJackOptions',
 227   'data': {
 228     '*in':  'AudiodevJackPerDirectionOptions',
 229     '*out': 'AudiodevJackPerDirectionOptions' } }
 230
 231 ##
 232 # @AudiodevOssPerDirectionOptions:
 233 #
 234 # Options of the OSS backend that are used for both playback and
 235 # recording.
 236 #
 237 # @dev: file name of the OSS device (default '/dev/dsp')
 238 #
 239 # @buffer-count: number of buffers
 240 #
 241 # @try-poll: attempt to use poll mode, falling back to non-polling
 242 #            access on failure (default true)
 243 #
 244 # Since: 4.0
 245 ##
 246 { 'struct': 'AudiodevOssPerDirectionOptions',
 247   'base': 'AudiodevPerDirectionOptions',
 248   'data': {
 249     '*dev':          'str',
 250     '*buffer-count': 'uint32',
 251     '*try-poll':     'bool' } }
 252
 253 ##
 254 # @AudiodevOssOptions:
 255 #
 256 # Options of the OSS audio backend.
 257 #
 258 # @in: options of the capture stream
 259 #
 260 # @out: options of the playback stream
 261 #
 262 # @try-mmap: try using memory-mapped access, falling back to
 263 #            non-memory-mapped access on failure (default true)
 264 #
 265 # @exclusive: open device in exclusive mode (vmix won't work)
 266 #             (default false)
 267 #
 268 # @dsp-policy: set the timing policy of the device (between 0 and 10,
 269 #              where smaller number means smaller latency but higher
 270 #              CPU usage) or -1 to use fragment mode (option ignored
 271 #              on some platforms) (default 5)
 272 #
 273 # Since: 4.0
 274 ##
 275 { 'struct': 'AudiodevOssOptions',
 276   'data': {
 277     '*in':         'AudiodevOssPerDirectionOptions',
 278     '*out':        'AudiodevOssPerDirectionOptions',
 279     '*try-mmap':   'bool',
 280     '*exclusive':  'bool',
 281     '*dsp-policy': 'uint32' } }
 282
 283 ##
 284 # @AudiodevPaPerDirectionOptions:
 285 #
 286 # Options of the Pulseaudio backend that are used for both playback and
 287 # recording.
 288 #
 289 # @name: name of the sink/source to use
 290 #
 291 # @stream-name: name of the PulseAudio stream created by qemu.  Can be
 292 #               used to identify the stream in PulseAudio when you
 293 #               create multiple PulseAudio devices or run multiple qemu
 294 #               instances (default: audiodev's id, since 4.2)
 295 #
 296 # @latency: latency you want PulseAudio to achieve in microseconds
 297 #           (default 15000)
 298 #
 299 # Since: 4.0
 300 ##
 301 { 'struct': 'AudiodevPaPerDirectionOptions',
 302   'base': 'AudiodevPerDirectionOptions',
 303   'data': {
 304     '*name': 'str',
 305     '*stream-name': 'str',
 306     '*latency': 'uint32' } }
 307
 308 ##
 309 # @AudiodevPaOptions:
 310 #
 311 # Options of the PulseAudio audio backend.
 312 #
 313 # @in: options of the capture stream
 314 #
 315 # @out: options of the playback stream
 316 #
 317 # @server: PulseAudio server address (default: let PulseAudio choose)
 318 #
 319 # Since: 4.0
 320 ##
 321 { 'struct': 'AudiodevPaOptions',
 322   'data': {
 323     '*in':     'AudiodevPaPerDirectionOptions',
 324     '*out':    'AudiodevPaPerDirectionOptions',
 325     '*server': 'str' } }
 326
 327 ##
 328 # @AudiodevSdlPerDirectionOptions:
 329 #
 330 # Options of the SDL audio backend that are used for both playback and
 331 # recording.
 332 #
 333 # @buffer-count: number of buffers (default 4)
 334 #
 335 # Since: 6.0
 336 ##
 337 { 'struct': 'AudiodevSdlPerDirectionOptions',
 338   'base': 'AudiodevPerDirectionOptions',
 339   'data': {
 340     '*buffer-count': 'uint32' } }
 341
 342 ##
 343 # @AudiodevSdlOptions:
 344 #
 345 # Options of the SDL audio backend.
 346 #
 347 # @in: options of the recording stream
 348 #
 349 # @out: options of the playback stream
 350 #
 351 # Since: 6.0
 352 ##
 353 { 'struct': 'AudiodevSdlOptions',
 354   'data': {
 355     '*in':  'AudiodevSdlPerDirectionOptions',
 356     '*out': 'AudiodevSdlPerDirectionOptions' } }
 357
 358 ##
 359 # @AudiodevWavOptions:
 360 #
 361 # Options of the wav audio backend.
 362 #
 363 # @in: options of the capture stream
 364 #
 365 # @out: options of the playback stream
 366 #
 367 # @path: name of the wav file to record (default 'qemu.wav')
 368 #
 369 # Since: 4.0
 370 ##
 371 { 'struct': 'AudiodevWavOptions',
 372   'data': {
 373     '*in':   'AudiodevPerDirectionOptions',
 374     '*out':  'AudiodevPerDirectionOptions',
 375     '*path': 'str' } }
 376
 377 ##
 378 # @AudioFormat:
 379 #
 380 # An enumeration of possible audio formats.
 381 #
 382 # @u8: unsigned 8 bit integer
 383 #
 384 # @s8: signed 8 bit integer
 385 #
 386 # @u16: unsigned 16 bit integer
 387 #
 388 # @s16: signed 16 bit integer
 389 #
 390 # @u32: unsigned 32 bit integer
 391 #
 392 # @s32: signed 32 bit integer
 393 #
 394 # @f32: single precision floating-point (since 5.0)
 395 #
 396 # Since: 4.0
 397 ##
 398 { 'enum': 'AudioFormat',
 399   'data': [ 'u8', 's8', 'u16', 's16', 'u32', 's32', 'f32' ] }
 400
 401 ##
 402 # @AudiodevDriver:
 403 #
 404 # An enumeration of possible audio backend drivers.
 405 #
 406 # @jack: JACK audio backend (since 5.1)
 407 #
 408 # Since: 4.0
 409 ##
 410 { 'enum': 'AudiodevDriver',
 411   'data': [ 'none',
 412             { 'name': 'alsa', 'if': 'CONFIG_AUDIO_ALSA' },
 413             { 'name': 'coreaudio', 'if': 'CONFIG_AUDIO_COREAUDIO' },
 414             { 'name': 'dbus', 'if': 'CONFIG_DBUS_DISPLAY' },
 415             { 'name': 'dsound', 'if': 'CONFIG_AUDIO_DSOUND' },
 416             { 'name': 'jack', 'if': 'CONFIG_AUDIO_JACK' },
 417             { 'name': 'oss', 'if': 'CONFIG_AUDIO_OSS' },
 418             { 'name': 'pa', 'if': 'CONFIG_AUDIO_PA' },
 419             { 'name': 'sdl', 'if': 'CONFIG_AUDIO_SDL' },
 420             { 'name': 'sndio', 'if': 'CONFIG_AUDIO_SNDIO' },
 421             { 'name': 'spice', 'if': 'CONFIG_SPICE' },
 422             'wav' ] }
 423
 424 ##
 425 # @Audiodev:
 426 #
 427 # Options of an audio backend.
 428 #
 429 # @id: identifier of the backend
 430 #
 431 # @driver: the backend driver to use
 432 #
 433 # @timer-period: timer period (in microseconds, 0: use lowest possible)
 434 #
 435 # Since: 4.0
 436 ##
 437 { 'union': 'Audiodev',
 438   'base': {
 439     'id':            'str',
 440     'driver':        'AudiodevDriver',
 441     '*timer-period': 'uint32' },
 442   'discriminator': 'driver',
 443   'data': {
 444     'none':      'AudiodevGenericOptions',
 445     'alsa':      { 'type': 'AudiodevAlsaOptions',
 446                    'if': 'CONFIG_AUDIO_ALSA' },
 447     'coreaudio': { 'type': 'AudiodevCoreaudioOptions',
 448                    'if': 'CONFIG_AUDIO_COREAUDIO' },
 449     'dbus':      { 'type': 'AudiodevGenericOptions',
 450                    'if': 'CONFIG_DBUS_DISPLAY' },
 451     'dsound':    { 'type': 'AudiodevDsoundOptions',
 452                    'if': 'CONFIG_AUDIO_DSOUND' },
 453     'jack':      { 'type': 'AudiodevJackOptions',
 454                    'if': 'CONFIG_AUDIO_JACK' },
 455     'oss':       { 'type': 'AudiodevOssOptions',
 456                    'if': 'CONFIG_AUDIO_OSS' },
 457     'pa':        { 'type': 'AudiodevPaOptions',
 458                    'if': 'CONFIG_AUDIO_PA' },
 459     'sdl':       { 'type': 'AudiodevSdlOptions',
 460                    'if': 'CONFIG_AUDIO_SDL' },
 461     'sndio':     { 'type': 'AudiodevSndioOptions',
 462                    'if': 'CONFIG_AUDIO_SNDIO' },
 463     'spice':     { 'type': 'AudiodevGenericOptions',
 464                    'if': 'CONFIG_SPICE' },
 465     'wav':       'AudiodevWavOptions' } }
 466
 467 ##
 468 # @query-audiodevs:
 469 #
 470 # Returns information about audiodev configuration
 471 #
 472 # Returns: array of @Audiodev
 473 #
 474 # Since: 8.0
 475 #
 476 ##
 477 { 'command': 'query-audiodevs',
 478   'returns': ['Audiodev'] }