1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 3.. _codec-controls: 4 5*********************** 6Codec Control Reference 7*********************** 8 9Below all controls within the Codec control class are described. First 10the generic controls, then controls specific for certain hardware. 11 12.. note:: 13 14 These controls are applicable to all codecs and not just MPEG. The 15 defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG as the controls 16 were originally made for MPEG codecs and later extended to cover all 17 encoding formats. 18 19 20Generic Codec Controls 21====================== 22 23 24.. _mpeg-control-id: 25 26Codec Control IDs 27----------------- 28 29``V4L2_CID_CODEC_CLASS (class)`` 30 The Codec class descriptor. Calling 31 :ref:`VIDIOC_QUERYCTRL` for this control will 32 return a description of this control class. This description can be 33 used as the caption of a Tab page in a GUI, for example. 34 35.. _v4l2-mpeg-stream-type: 36 37``V4L2_CID_MPEG_STREAM_TYPE`` 38 (enum) 39 40enum v4l2_mpeg_stream_type - 41 The MPEG-1, -2 or -4 output stream type. One cannot assume anything 42 here. Each hardware MPEG encoder tends to support different subsets 43 of the available MPEG stream types. This control is specific to 44 multiplexed MPEG streams. The currently defined stream types are: 45 46 47 48.. flat-table:: 49 :header-rows: 0 50 :stub-columns: 0 51 52 * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_PS`` 53 - MPEG-2 program stream 54 * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_TS`` 55 - MPEG-2 transport stream 56 * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_SS`` 57 - MPEG-1 system stream 58 * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_DVD`` 59 - MPEG-2 DVD-compatible stream 60 * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_VCD`` 61 - MPEG-1 VCD-compatible stream 62 * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD`` 63 - MPEG-2 SVCD-compatible stream 64 65 66 67``V4L2_CID_MPEG_STREAM_PID_PMT (integer)`` 68 Program Map Table Packet ID for the MPEG transport stream (default 69 16) 70 71``V4L2_CID_MPEG_STREAM_PID_AUDIO (integer)`` 72 Audio Packet ID for the MPEG transport stream (default 256) 73 74``V4L2_CID_MPEG_STREAM_PID_VIDEO (integer)`` 75 Video Packet ID for the MPEG transport stream (default 260) 76 77``V4L2_CID_MPEG_STREAM_PID_PCR (integer)`` 78 Packet ID for the MPEG transport stream carrying PCR fields (default 79 259) 80 81``V4L2_CID_MPEG_STREAM_PES_ID_AUDIO (integer)`` 82 Audio ID for MPEG PES 83 84``V4L2_CID_MPEG_STREAM_PES_ID_VIDEO (integer)`` 85 Video ID for MPEG PES 86 87.. _v4l2-mpeg-stream-vbi-fmt: 88 89``V4L2_CID_MPEG_STREAM_VBI_FMT`` 90 (enum) 91 92enum v4l2_mpeg_stream_vbi_fmt - 93 Some cards can embed VBI data (e. g. Closed Caption, Teletext) into 94 the MPEG stream. This control selects whether VBI data should be 95 embedded, and if so, what embedding method should be used. The list 96 of possible VBI formats depends on the driver. The currently defined 97 VBI format types are: 98 99 100 101.. tabularcolumns:: |p{6.6 cm}|p{10.9cm}| 102 103.. flat-table:: 104 :header-rows: 0 105 :stub-columns: 0 106 107 * - ``V4L2_MPEG_STREAM_VBI_FMT_NONE`` 108 - No VBI in the MPEG stream 109 * - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV`` 110 - VBI in private packets, IVTV format (documented in the kernel 111 sources in the file 112 ``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``) 113 114 115 116.. _v4l2-mpeg-audio-sampling-freq: 117 118``V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ`` 119 (enum) 120 121enum v4l2_mpeg_audio_sampling_freq - 122 MPEG Audio sampling frequency. Possible values are: 123 124 125 126.. flat-table:: 127 :header-rows: 0 128 :stub-columns: 0 129 130 * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100`` 131 - 44.1 kHz 132 * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000`` 133 - 48 kHz 134 * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000`` 135 - 32 kHz 136 137 138 139.. _v4l2-mpeg-audio-encoding: 140 141``V4L2_CID_MPEG_AUDIO_ENCODING`` 142 (enum) 143 144enum v4l2_mpeg_audio_encoding - 145 MPEG Audio encoding. This control is specific to multiplexed MPEG 146 streams. Possible values are: 147 148 149 150.. flat-table:: 151 :header-rows: 0 152 :stub-columns: 0 153 154 * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_1`` 155 - MPEG-1/2 Layer I encoding 156 * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_2`` 157 - MPEG-1/2 Layer II encoding 158 * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_3`` 159 - MPEG-1/2 Layer III encoding 160 * - ``V4L2_MPEG_AUDIO_ENCODING_AAC`` 161 - MPEG-2/4 AAC (Advanced Audio Coding) 162 * - ``V4L2_MPEG_AUDIO_ENCODING_AC3`` 163 - AC-3 aka ATSC A/52 encoding 164 165 166 167.. _v4l2-mpeg-audio-l1-bitrate: 168 169``V4L2_CID_MPEG_AUDIO_L1_BITRATE`` 170 (enum) 171 172enum v4l2_mpeg_audio_l1_bitrate - 173 MPEG-1/2 Layer I bitrate. Possible values are: 174 175 176 177.. flat-table:: 178 :header-rows: 0 179 :stub-columns: 0 180 181 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_32K`` 182 - 32 kbit/s 183 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_64K`` 184 - 64 kbit/s 185 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_96K`` 186 - 96 kbit/s 187 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_128K`` 188 - 128 kbit/s 189 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_160K`` 190 - 160 kbit/s 191 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_192K`` 192 - 192 kbit/s 193 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_224K`` 194 - 224 kbit/s 195 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_256K`` 196 - 256 kbit/s 197 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_288K`` 198 - 288 kbit/s 199 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_320K`` 200 - 320 kbit/s 201 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_352K`` 202 - 352 kbit/s 203 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_384K`` 204 - 384 kbit/s 205 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_416K`` 206 - 416 kbit/s 207 * - ``V4L2_MPEG_AUDIO_L1_BITRATE_448K`` 208 - 448 kbit/s 209 210 211 212.. _v4l2-mpeg-audio-l2-bitrate: 213 214``V4L2_CID_MPEG_AUDIO_L2_BITRATE`` 215 (enum) 216 217enum v4l2_mpeg_audio_l2_bitrate - 218 MPEG-1/2 Layer II bitrate. Possible values are: 219 220 221 222.. flat-table:: 223 :header-rows: 0 224 :stub-columns: 0 225 226 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_32K`` 227 - 32 kbit/s 228 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_48K`` 229 - 48 kbit/s 230 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_56K`` 231 - 56 kbit/s 232 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_64K`` 233 - 64 kbit/s 234 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_80K`` 235 - 80 kbit/s 236 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_96K`` 237 - 96 kbit/s 238 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_112K`` 239 - 112 kbit/s 240 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_128K`` 241 - 128 kbit/s 242 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_160K`` 243 - 160 kbit/s 244 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_192K`` 245 - 192 kbit/s 246 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_224K`` 247 - 224 kbit/s 248 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_256K`` 249 - 256 kbit/s 250 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_320K`` 251 - 320 kbit/s 252 * - ``V4L2_MPEG_AUDIO_L2_BITRATE_384K`` 253 - 384 kbit/s 254 255 256 257.. _v4l2-mpeg-audio-l3-bitrate: 258 259``V4L2_CID_MPEG_AUDIO_L3_BITRATE`` 260 (enum) 261 262enum v4l2_mpeg_audio_l3_bitrate - 263 MPEG-1/2 Layer III bitrate. Possible values are: 264 265 266 267.. flat-table:: 268 :header-rows: 0 269 :stub-columns: 0 270 271 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_32K`` 272 - 32 kbit/s 273 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_40K`` 274 - 40 kbit/s 275 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_48K`` 276 - 48 kbit/s 277 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_56K`` 278 - 56 kbit/s 279 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_64K`` 280 - 64 kbit/s 281 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_80K`` 282 - 80 kbit/s 283 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_96K`` 284 - 96 kbit/s 285 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_112K`` 286 - 112 kbit/s 287 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_128K`` 288 - 128 kbit/s 289 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_160K`` 290 - 160 kbit/s 291 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_192K`` 292 - 192 kbit/s 293 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_224K`` 294 - 224 kbit/s 295 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_256K`` 296 - 256 kbit/s 297 * - ``V4L2_MPEG_AUDIO_L3_BITRATE_320K`` 298 - 320 kbit/s 299 300 301 302``V4L2_CID_MPEG_AUDIO_AAC_BITRATE (integer)`` 303 AAC bitrate in bits per second. 304 305.. _v4l2-mpeg-audio-ac3-bitrate: 306 307``V4L2_CID_MPEG_AUDIO_AC3_BITRATE`` 308 (enum) 309 310enum v4l2_mpeg_audio_ac3_bitrate - 311 AC-3 bitrate. Possible values are: 312 313 314 315.. flat-table:: 316 :header-rows: 0 317 :stub-columns: 0 318 319 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_32K`` 320 - 32 kbit/s 321 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_40K`` 322 - 40 kbit/s 323 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_48K`` 324 - 48 kbit/s 325 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_56K`` 326 - 56 kbit/s 327 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_64K`` 328 - 64 kbit/s 329 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_80K`` 330 - 80 kbit/s 331 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_96K`` 332 - 96 kbit/s 333 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_112K`` 334 - 112 kbit/s 335 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_128K`` 336 - 128 kbit/s 337 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_160K`` 338 - 160 kbit/s 339 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_192K`` 340 - 192 kbit/s 341 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_224K`` 342 - 224 kbit/s 343 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_256K`` 344 - 256 kbit/s 345 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_320K`` 346 - 320 kbit/s 347 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_384K`` 348 - 384 kbit/s 349 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_448K`` 350 - 448 kbit/s 351 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_512K`` 352 - 512 kbit/s 353 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_576K`` 354 - 576 kbit/s 355 * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_640K`` 356 - 640 kbit/s 357 358 359 360.. _v4l2-mpeg-audio-mode: 361 362``V4L2_CID_MPEG_AUDIO_MODE`` 363 (enum) 364 365enum v4l2_mpeg_audio_mode - 366 MPEG Audio mode. Possible values are: 367 368 369 370.. flat-table:: 371 :header-rows: 0 372 :stub-columns: 0 373 374 * - ``V4L2_MPEG_AUDIO_MODE_STEREO`` 375 - Stereo 376 * - ``V4L2_MPEG_AUDIO_MODE_JOINT_STEREO`` 377 - Joint Stereo 378 * - ``V4L2_MPEG_AUDIO_MODE_DUAL`` 379 - Bilingual 380 * - ``V4L2_MPEG_AUDIO_MODE_MONO`` 381 - Mono 382 383 384 385.. _v4l2-mpeg-audio-mode-extension: 386 387``V4L2_CID_MPEG_AUDIO_MODE_EXTENSION`` 388 (enum) 389 390enum v4l2_mpeg_audio_mode_extension - 391 Joint Stereo audio mode extension. In Layer I and II they indicate 392 which subbands are in intensity stereo. All other subbands are coded 393 in stereo. Layer III is not (yet) supported. Possible values are: 394 395.. tabularcolumns:: |p{9.1cm}|p{8.4cm}| 396 397.. flat-table:: 398 :header-rows: 0 399 :stub-columns: 0 400 401 * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4`` 402 - Subbands 4-31 in intensity stereo 403 * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8`` 404 - Subbands 8-31 in intensity stereo 405 * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12`` 406 - Subbands 12-31 in intensity stereo 407 * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16`` 408 - Subbands 16-31 in intensity stereo 409 410 411 412.. _v4l2-mpeg-audio-emphasis: 413 414``V4L2_CID_MPEG_AUDIO_EMPHASIS`` 415 (enum) 416 417enum v4l2_mpeg_audio_emphasis - 418 Audio Emphasis. Possible values are: 419 420 421 422.. flat-table:: 423 :header-rows: 0 424 :stub-columns: 0 425 426 * - ``V4L2_MPEG_AUDIO_EMPHASIS_NONE`` 427 - None 428 * - ``V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS`` 429 - 50/15 microsecond emphasis 430 * - ``V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17`` 431 - CCITT J.17 432 433 434 435.. _v4l2-mpeg-audio-crc: 436 437``V4L2_CID_MPEG_AUDIO_CRC`` 438 (enum) 439 440enum v4l2_mpeg_audio_crc - 441 CRC method. Possible values are: 442 443 444 445.. flat-table:: 446 :header-rows: 0 447 :stub-columns: 0 448 449 * - ``V4L2_MPEG_AUDIO_CRC_NONE`` 450 - None 451 * - ``V4L2_MPEG_AUDIO_CRC_CRC16`` 452 - 16 bit parity check 453 454 455 456``V4L2_CID_MPEG_AUDIO_MUTE (boolean)`` 457 Mutes the audio when capturing. This is not done by muting audio 458 hardware, which can still produce a slight hiss, but in the encoder 459 itself, guaranteeing a fixed and reproducible audio bitstream. 0 = 460 unmuted, 1 = muted. 461 462.. _v4l2-mpeg-audio-dec-playback: 463 464``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` 465 (enum) 466 467enum v4l2_mpeg_audio_dec_playback - 468 Determines how monolingual audio should be played back. Possible 469 values are: 470 471 472 473.. tabularcolumns:: |p{9.8cm}|p{7.7cm}| 474 475.. flat-table:: 476 :header-rows: 0 477 :stub-columns: 0 478 479 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO`` 480 - Automatically determines the best playback mode. 481 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO`` 482 - Stereo playback. 483 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT`` 484 - Left channel playback. 485 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT`` 486 - Right channel playback. 487 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO`` 488 - Mono playback. 489 * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO`` 490 - Stereo playback with swapped left and right channels. 491 492 493 494.. _v4l2-mpeg-audio-dec-multilingual-playback: 495 496``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` 497 (enum) 498 499enum v4l2_mpeg_audio_dec_playback - 500 Determines how multilingual audio should be played back. 501 502.. _v4l2-mpeg-video-encoding: 503 504``V4L2_CID_MPEG_VIDEO_ENCODING`` 505 (enum) 506 507enum v4l2_mpeg_video_encoding - 508 MPEG Video encoding method. This control is specific to multiplexed 509 MPEG streams. Possible values are: 510 511 512 513.. flat-table:: 514 :header-rows: 0 515 :stub-columns: 0 516 517 * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_1`` 518 - MPEG-1 Video encoding 519 * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_2`` 520 - MPEG-2 Video encoding 521 * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC`` 522 - MPEG-4 AVC (H.264) Video encoding 523 524 525 526.. _v4l2-mpeg-video-aspect: 527 528``V4L2_CID_MPEG_VIDEO_ASPECT`` 529 (enum) 530 531enum v4l2_mpeg_video_aspect - 532 Video aspect. Possible values are: 533 534 535 536.. flat-table:: 537 :header-rows: 0 538 :stub-columns: 0 539 540 * - ``V4L2_MPEG_VIDEO_ASPECT_1x1`` 541 * - ``V4L2_MPEG_VIDEO_ASPECT_4x3`` 542 * - ``V4L2_MPEG_VIDEO_ASPECT_16x9`` 543 * - ``V4L2_MPEG_VIDEO_ASPECT_221x100`` 544 545 546 547``V4L2_CID_MPEG_VIDEO_B_FRAMES (integer)`` 548 Number of B-Frames (default 2) 549 550``V4L2_CID_MPEG_VIDEO_GOP_SIZE (integer)`` 551 GOP size (default 12) 552 553``V4L2_CID_MPEG_VIDEO_GOP_CLOSURE (boolean)`` 554 GOP closure (default 1) 555 556``V4L2_CID_MPEG_VIDEO_PULLDOWN (boolean)`` 557 Enable 3:2 pulldown (default 0) 558 559.. _v4l2-mpeg-video-bitrate-mode: 560 561``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` 562 (enum) 563 564enum v4l2_mpeg_video_bitrate_mode - 565 Video bitrate mode. Possible values are: 566 567 568 569.. flat-table:: 570 :header-rows: 0 571 :stub-columns: 0 572 573 * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_VBR`` 574 - Variable bitrate 575 * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CBR`` 576 - Constant bitrate 577 * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ`` 578 - Constant quality 579 580 581 582``V4L2_CID_MPEG_VIDEO_BITRATE (integer)`` 583 Average video bitrate in bits per second. 584 585``V4L2_CID_MPEG_VIDEO_BITRATE_PEAK (integer)`` 586 Peak video bitrate in bits per second. Must be larger or equal to 587 the average video bitrate. It is ignored if the video bitrate mode 588 is set to constant bitrate. 589 590``V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY (integer)`` 591 Constant quality level control. This control is applicable when 592 ``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` value is 593 ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``. Valid range is 1 to 100 594 where 1 indicates lowest quality and 100 indicates highest quality. 595 Encoder will decide the appropriate quantization parameter and 596 bitrate to produce requested frame quality. 597 598 599``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE (enum)`` 600 601enum v4l2_mpeg_video_frame_skip_mode - 602 Indicates in what conditions the encoder should skip frames. If 603 encoding a frame would cause the encoded stream to be larger then a 604 chosen data limit then the frame will be skipped. Possible values 605 are: 606 607 608.. tabularcolumns:: |p{8.2cm}|p{9.3cm}| 609 610.. raw:: latex 611 612 \small 613 614.. flat-table:: 615 :header-rows: 0 616 :stub-columns: 0 617 618 * - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_DISABLED`` 619 - Frame skip mode is disabled. 620 * - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT`` 621 - Frame skip mode enabled and buffer limit is set by the chosen 622 level and is defined by the standard. 623 * - ``V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT`` 624 - Frame skip mode enabled and buffer limit is set by the 625 :ref:`VBV (MPEG1/2/4) <v4l2-mpeg-video-vbv-size>` or 626 :ref:`CPB (H264) buffer size <v4l2-mpeg-video-h264-cpb-size>` control. 627 628.. raw:: latex 629 630 \normalsize 631 632``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)`` 633 For every captured frame, skip this many subsequent frames (default 634 0). 635 636``V4L2_CID_MPEG_VIDEO_MUTE (boolean)`` 637 "Mutes" the video to a fixed color when capturing. This is useful 638 for testing, to produce a fixed video bitstream. 0 = unmuted, 1 = 639 muted. 640 641``V4L2_CID_MPEG_VIDEO_MUTE_YUV (integer)`` 642 Sets the "mute" color of the video. The supplied 32-bit integer is 643 interpreted as follows (bit 0 = least significant bit): 644 645 646 647.. flat-table:: 648 :header-rows: 0 649 :stub-columns: 0 650 651 * - Bit 0:7 652 - V chrominance information 653 * - Bit 8:15 654 - U chrominance information 655 * - Bit 16:23 656 - Y luminance information 657 * - Bit 24:31 658 - Must be zero. 659 660 661 662.. _v4l2-mpeg-video-dec-pts: 663 664``V4L2_CID_MPEG_VIDEO_DEC_PTS (integer64)`` 665 This read-only control returns the 33-bit video Presentation Time 666 Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of the 667 currently displayed frame. This is the same PTS as is used in 668 :ref:`VIDIOC_DECODER_CMD`. 669 670.. _v4l2-mpeg-video-dec-frame: 671 672``V4L2_CID_MPEG_VIDEO_DEC_FRAME (integer64)`` 673 This read-only control returns the frame counter of the frame that 674 is currently displayed (decoded). This value is reset to 0 whenever 675 the decoder is started. 676 677``V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR (integer64)`` 678 This control sets the conceal color in YUV color space. It describes 679 the client preference of the error conceal color in case of an error 680 where the reference frame is missing. The decoder should fill the 681 reference buffer with the preferred color and use it for future 682 decoding. The control is using 16 bits per channel. 683 Applicable to decoders. 684 685.. flat-table:: 686 :header-rows: 0 687 :stub-columns: 0 688 689 * - 690 - 8bit format 691 - 10bit format 692 - 12bit format 693 * - Y luminance 694 - Bit 0:7 695 - Bit 0:9 696 - Bit 0:11 697 * - Cb chrominance 698 - Bit 16:23 699 - Bit 16:25 700 - Bit 16:27 701 * - Cr chrominance 702 - Bit 32:39 703 - Bit 32:41 704 - Bit 32:43 705 * - Must be zero 706 - Bit 48:63 707 - Bit 48:63 708 - Bit 48:63 709 710``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)`` 711 If enabled the decoder expects to receive a single slice per buffer, 712 otherwise the decoder expects a single frame in per buffer. 713 Applicable to the decoder, all codecs. 714 715``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE (boolean)`` 716 If the display delay is enabled then the decoder is forced to return 717 a CAPTURE buffer (decoded frame) after processing a certain number 718 of OUTPUT buffers. The delay can be set through 719 ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY``. This 720 feature can be used for example for generating thumbnails of videos. 721 Applicable to the decoder. 722 723``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY (integer)`` 724 Display delay value for decoder. The decoder is forced to 725 return a decoded frame after the set 'display delay' number of 726 frames. If this number is low it may result in frames returned out 727 of display order, in addition the hardware may still be using the 728 returned buffer as a reference picture for subsequent frames. 729 730``V4L2_CID_MPEG_VIDEO_AU_DELIMITER (boolean)`` 731 If enabled then, AUD (Access Unit Delimiter) NALUs will be generated. 732 That could be useful to find the start of a frame without having to 733 fully parse each NALU. Applicable to the H264 and HEVC encoders. 734 735``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)`` 736 Enable writing sample aspect ratio in the Video Usability 737 Information. Applicable to the H264 encoder. 738 739.. _v4l2-mpeg-video-h264-vui-sar-idc: 740 741``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC`` 742 (enum) 743 744enum v4l2_mpeg_video_h264_vui_sar_idc - 745 VUI sample aspect ratio indicator for H.264 encoding. The value is 746 defined in the table E-1 in the standard. Applicable to the H264 747 encoder. 748 749 750 751.. flat-table:: 752 :header-rows: 0 753 :stub-columns: 0 754 755 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED`` 756 - Unspecified 757 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1`` 758 - 1x1 759 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11`` 760 - 12x11 761 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11`` 762 - 10x11 763 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11`` 764 - 16x11 765 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33`` 766 - 40x33 767 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11`` 768 - 24x11 769 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11`` 770 - 20x11 771 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11`` 772 - 32x11 773 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33`` 774 - 80x33 775 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11`` 776 - 18x11 777 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11`` 778 - 15x11 779 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33`` 780 - 64x33 781 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99`` 782 - 160x99 783 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3`` 784 - 4x3 785 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2`` 786 - 3x2 787 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1`` 788 - 2x1 789 * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED`` 790 - Extended SAR 791 792 793 794``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH (integer)`` 795 Extended sample aspect ratio width for H.264 VUI encoding. 796 Applicable to the H264 encoder. 797 798``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT (integer)`` 799 Extended sample aspect ratio height for H.264 VUI encoding. 800 Applicable to the H264 encoder. 801 802.. _v4l2-mpeg-video-h264-level: 803 804``V4L2_CID_MPEG_VIDEO_H264_LEVEL`` 805 (enum) 806 807enum v4l2_mpeg_video_h264_level - 808 The level information for the H264 video elementary stream. 809 Applicable to the H264 encoder. Possible values are: 810 811 812 813.. flat-table:: 814 :header-rows: 0 815 :stub-columns: 0 816 817 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_0`` 818 - Level 1.0 819 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1B`` 820 - Level 1B 821 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_1`` 822 - Level 1.1 823 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_2`` 824 - Level 1.2 825 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_3`` 826 - Level 1.3 827 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_0`` 828 - Level 2.0 829 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_1`` 830 - Level 2.1 831 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_2`` 832 - Level 2.2 833 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_0`` 834 - Level 3.0 835 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_1`` 836 - Level 3.1 837 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_2`` 838 - Level 3.2 839 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_0`` 840 - Level 4.0 841 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_1`` 842 - Level 4.1 843 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_2`` 844 - Level 4.2 845 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_0`` 846 - Level 5.0 847 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_1`` 848 - Level 5.1 849 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_2`` 850 - Level 5.2 851 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_0`` 852 - Level 6.0 853 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_1`` 854 - Level 6.1 855 * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_2`` 856 - Level 6.2 857 858 859 860.. _v4l2-mpeg-video-mpeg2-level: 861 862``V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL`` 863 (enum) 864 865enum v4l2_mpeg_video_mpeg2_level - 866 The level information for the MPEG2 elementary stream. Applicable to 867 MPEG2 codecs. Possible values are: 868 869 870 871.. flat-table:: 872 :header-rows: 0 873 :stub-columns: 0 874 875 * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW`` 876 - Low Level (LL) 877 * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN`` 878 - Main Level (ML) 879 * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440`` 880 - High-1440 Level (H-14) 881 * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH`` 882 - High Level (HL) 883 884 885 886.. _v4l2-mpeg-video-mpeg4-level: 887 888``V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL`` 889 (enum) 890 891enum v4l2_mpeg_video_mpeg4_level - 892 The level information for the MPEG4 elementary stream. Applicable to 893 the MPEG4 encoder. Possible values are: 894 895 896 897.. flat-table:: 898 :header-rows: 0 899 :stub-columns: 0 900 901 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0`` 902 - Level 0 903 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B`` 904 - Level 0b 905 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_1`` 906 - Level 1 907 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_2`` 908 - Level 2 909 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3`` 910 - Level 3 911 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B`` 912 - Level 3b 913 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_4`` 914 - Level 4 915 * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_5`` 916 - Level 5 917 918 919 920.. _v4l2-mpeg-video-h264-profile: 921 922``V4L2_CID_MPEG_VIDEO_H264_PROFILE`` 923 (enum) 924 925enum v4l2_mpeg_video_h264_profile - 926 The profile information for H264. Applicable to the H264 encoder. 927 Possible values are: 928 929.. raw:: latex 930 931 \small 932 933.. tabularcolumns:: |p{10.2cm}|p{7.3cm}| 934 935.. flat-table:: 936 :header-rows: 0 937 :stub-columns: 0 938 939 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE`` 940 - Baseline profile 941 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE`` 942 - Constrained Baseline profile 943 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MAIN`` 944 - Main profile 945 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED`` 946 - Extended profile 947 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH`` 948 - High profile 949 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10`` 950 - High 10 profile 951 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422`` 952 - High 422 profile 953 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE`` 954 - High 444 Predictive profile 955 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA`` 956 - High 10 Intra profile 957 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA`` 958 - High 422 Intra profile 959 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA`` 960 - High 444 Intra profile 961 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA`` 962 - CAVLC 444 Intra profile 963 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE`` 964 - Scalable Baseline profile 965 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH`` 966 - Scalable High profile 967 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA`` 968 - Scalable High Intra profile 969 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH`` 970 - Stereo High profile 971 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH`` 972 - Multiview High profile 973 * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_HIGH`` 974 - Constrained High profile 975 976.. raw:: latex 977 978 \normalsize 979 980.. _v4l2-mpeg-video-mpeg2-profile: 981 982``V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE`` 983 (enum) 984 985enum v4l2_mpeg_video_mpeg2_profile - 986 The profile information for MPEG2. Applicable to MPEG2 codecs. 987 Possible values are: 988 989.. raw:: latex 990 991 \small 992 993.. tabularcolumns:: |p{10.2cm}|p{7.3cm}| 994 995.. flat-table:: 996 :header-rows: 0 997 :stub-columns: 0 998 999 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE`` 1000 - Simple profile (SP) 1001 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN`` 1002 - Main profile (MP) 1003 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE`` 1004 - SNR Scalable profile (SNR) 1005 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE`` 1006 - Spatially Scalable profile (Spt) 1007 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH`` 1008 - High profile (HP) 1009 * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW`` 1010 - Multi-view profile (MVP) 1011 1012 1013.. raw:: latex 1014 1015 \normalsize 1016 1017.. _v4l2-mpeg-video-mpeg4-profile: 1018 1019``V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE`` 1020 (enum) 1021 1022enum v4l2_mpeg_video_mpeg4_profile - 1023 The profile information for MPEG4. Applicable to the MPEG4 encoder. 1024 Possible values are: 1025 1026.. raw:: latex 1027 1028 \small 1029 1030.. tabularcolumns:: |p{11.8cm}|p{5.7cm}| 1031 1032.. flat-table:: 1033 :header-rows: 0 1034 :stub-columns: 0 1035 1036 * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE`` 1037 - Simple profile 1038 * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE`` 1039 - Advanced Simple profile 1040 * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE`` 1041 - Core profile 1042 * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE`` 1043 - Simple Scalable profile 1044 * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY`` 1045 - Advanced Coding Efficiency profile 1046 1047.. raw:: latex 1048 1049 \normalsize 1050 1051``V4L2_CID_MPEG_VIDEO_MAX_REF_PIC (integer)`` 1052 The maximum number of reference pictures used for encoding. 1053 Applicable to the encoder. 1054 1055.. _v4l2-mpeg-video-multi-slice-mode: 1056 1057``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` 1058 (enum) 1059 1060enum v4l2_mpeg_video_multi_slice_mode - 1061 Determines how the encoder should handle division of frame into 1062 slices. Applicable to the encoder. Possible values are: 1063 1064 1065 1066.. tabularcolumns:: |p{9.6cm}|p{7.9cm}| 1067 1068.. flat-table:: 1069 :header-rows: 0 1070 :stub-columns: 0 1071 1072 * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE`` 1073 - Single slice per frame. 1074 * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB`` 1075 - Multiple slices with set maximum number of macroblocks per slice. 1076 * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES`` 1077 - Multiple slice with set maximum size in bytes per slice. 1078 1079 1080 1081``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB (integer)`` 1082 The maximum number of macroblocks in a slice. Used when 1083 ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to 1084 ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``. Applicable to the 1085 encoder. 1086 1087``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES (integer)`` 1088 The maximum size of a slice in bytes. Used when 1089 ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to 1090 ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``. Applicable to the 1091 encoder. 1092 1093.. _v4l2-mpeg-video-h264-loop-filter-mode: 1094 1095``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE`` 1096 (enum) 1097 1098enum v4l2_mpeg_video_h264_loop_filter_mode - 1099 Loop filter mode for H264 encoder. Possible values are: 1100 1101.. raw:: latex 1102 1103 \small 1104 1105.. tabularcolumns:: |p{13.5cm}|p{4.0cm}| 1106 1107.. flat-table:: 1108 :header-rows: 0 1109 :stub-columns: 0 1110 1111 * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED`` 1112 - Loop filter is enabled. 1113 * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED`` 1114 - Loop filter is disabled. 1115 * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY`` 1116 - Loop filter is disabled at the slice boundary. 1117 1118.. raw:: latex 1119 1120 \normalsize 1121 1122 1123``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA (integer)`` 1124 Loop filter alpha coefficient, defined in the H264 standard. 1125 This value corresponds to the slice_alpha_c0_offset_div2 slice header 1126 field, and should be in the range of -6 to +6, inclusive. The actual alpha 1127 offset FilterOffsetA is twice this value. 1128 Applicable to the H264 encoder. 1129 1130``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA (integer)`` 1131 Loop filter beta coefficient, defined in the H264 standard. 1132 This corresponds to the slice_beta_offset_div2 slice header field, and 1133 should be in the range of -6 to +6, inclusive. The actual beta offset 1134 FilterOffsetB is twice this value. 1135 Applicable to the H264 encoder. 1136 1137.. _v4l2-mpeg-video-h264-entropy-mode: 1138 1139``V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE`` 1140 (enum) 1141 1142enum v4l2_mpeg_video_h264_entropy_mode - 1143 Entropy coding mode for H264 - CABAC/CAVALC. Applicable to the H264 1144 encoder. Possible values are: 1145 1146 1147.. tabularcolumns:: |p{9.0cm}|p{8.5cm}| 1148 1149 1150.. flat-table:: 1151 :header-rows: 0 1152 :stub-columns: 0 1153 1154 * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC`` 1155 - Use CAVLC entropy coding. 1156 * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC`` 1157 - Use CABAC entropy coding. 1158 1159 1160 1161``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)`` 1162 Enable 8X8 transform for H264. Applicable to the H264 encoder. 1163 1164``V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (boolean)`` 1165 Enable constrained intra prediction for H264. Applicable to the H264 1166 encoder. 1167 1168``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)`` 1169 Specify the offset that should be added to the luma quantization 1170 parameter to determine the chroma quantization parameter. Applicable 1171 to the H264 encoder. 1172 1173``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)`` 1174 Cyclic intra macroblock refresh. This is the number of continuous 1175 macroblocks refreshed every frame. Each frame a successive set of 1176 macroblocks is refreshed until the cycle completes and starts from 1177 the top of the frame. Setting this control to zero means that 1178 macroblocks will not be refreshed. Note that this control will not 1179 take effect when ``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD`` control 1180 is set to non zero value. 1181 Applicable to H264, H263 and MPEG4 encoder. 1182 1183``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD (integer)`` 1184 Intra macroblock refresh period. This sets the period to refresh 1185 the whole frame. In other words, this defines the number of frames 1186 for which the whole frame will be intra-refreshed. An example: 1187 setting period to 1 means that the whole frame will be refreshed, 1188 setting period to 2 means that the half of macroblocks will be 1189 intra-refreshed on frameX and the other half of macroblocks 1190 will be refreshed in frameX + 1 and so on. Setting the period to 1191 zero means no period is specified. 1192 Note that if the client sets this control to non zero value the 1193 ``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB`` control shall be 1194 ignored. Applicable to H264 and HEVC encoders. 1195 1196``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)`` 1197 Frame level rate control enable. If this control is disabled then 1198 the quantization parameter for each frame type is constant and set 1199 with appropriate controls (e.g. 1200 ``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is 1201 enabled then quantization parameter is adjusted to meet the chosen 1202 bitrate. Minimum and maximum value for the quantization parameter 1203 can be set with appropriate controls (e.g. 1204 ``V4L2_CID_MPEG_VIDEO_H263_MIN_QP``). Applicable to encoders. 1205 1206``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE (boolean)`` 1207 Macroblock level rate control enable. Applicable to the MPEG4 and 1208 H264 encoders. 1209 1210``V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (boolean)`` 1211 Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4 1212 encoder. 1213 1214``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP (integer)`` 1215 Quantization parameter for an I frame for H263. Valid range: from 1 1216 to 31. 1217 1218``V4L2_CID_MPEG_VIDEO_H263_MIN_QP (integer)`` 1219 Minimum quantization parameter for H263. Valid range: from 1 to 31. 1220 1221``V4L2_CID_MPEG_VIDEO_H263_MAX_QP (integer)`` 1222 Maximum quantization parameter for H263. Valid range: from 1 to 31. 1223 1224``V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (integer)`` 1225 Quantization parameter for an P frame for H263. Valid range: from 1 1226 to 31. 1227 1228``V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP (integer)`` 1229 Quantization parameter for an B frame for H263. Valid range: from 1 1230 to 31. 1231 1232``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP (integer)`` 1233 Quantization parameter for an I frame for H264. Valid range: from 0 1234 to 51. 1235 1236``V4L2_CID_MPEG_VIDEO_H264_MIN_QP (integer)`` 1237 Minimum quantization parameter for H264. Valid range: from 0 to 51. 1238 1239``V4L2_CID_MPEG_VIDEO_H264_MAX_QP (integer)`` 1240 Maximum quantization parameter for H264. Valid range: from 0 to 51. 1241 1242``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP (integer)`` 1243 Quantization parameter for an P frame for H264. Valid range: from 0 1244 to 51. 1245 1246``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP (integer)`` 1247 Quantization parameter for an B frame for H264. Valid range: from 0 1248 to 51. 1249 1250``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)`` 1251 Minimum quantization parameter for the H264 I frame to limit I frame 1252 quality to a range. Valid range: from 0 to 51. If 1253 V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter 1254 should be chosen to meet both requirements. 1255 1256``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)`` 1257 Maximum quantization parameter for the H264 I frame to limit I frame 1258 quality to a range. Valid range: from 0 to 51. If 1259 V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter 1260 should be chosen to meet both requirements. 1261 1262``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)`` 1263 Minimum quantization parameter for the H264 P frame to limit P frame 1264 quality to a range. Valid range: from 0 to 51. If 1265 V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter 1266 should be chosen to meet both requirements. 1267 1268``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)`` 1269 Maximum quantization parameter for the H264 P frame to limit P frame 1270 quality to a range. Valid range: from 0 to 51. If 1271 V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter 1272 should be chosen to meet both requirements. 1273 1274``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP (integer)`` 1275 Minimum quantization parameter for the H264 B frame to limit B frame 1276 quality to a range. Valid range: from 0 to 51. If 1277 V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter 1278 should be chosen to meet both requirements. 1279 1280``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP (integer)`` 1281 Maximum quantization parameter for the H264 B frame to limit B frame 1282 quality to a range. Valid range: from 0 to 51. If 1283 V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter 1284 should be chosen to meet both requirements. 1285 1286``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)`` 1287 Quantization parameter for an I frame for MPEG4. Valid range: from 1 1288 to 31. 1289 1290``V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP (integer)`` 1291 Minimum quantization parameter for MPEG4. Valid range: from 1 to 31. 1292 1293``V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP (integer)`` 1294 Maximum quantization parameter for MPEG4. Valid range: from 1 to 31. 1295 1296``V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (integer)`` 1297 Quantization parameter for an P frame for MPEG4. Valid range: from 1 1298 to 31. 1299 1300``V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (integer)`` 1301 Quantization parameter for an B frame for MPEG4. Valid range: from 1 1302 to 31. 1303 1304.. _v4l2-mpeg-video-vbv-size: 1305 1306``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)`` 1307 The Video Buffer Verifier size in kilobytes, it is used as a 1308 limitation of frame skip. The VBV is defined in the standard as a 1309 mean to verify that the produced stream will be successfully 1310 decoded. The standard describes it as "Part of a hypothetical 1311 decoder that is conceptually connected to the output of the encoder. 1312 Its purpose is to provide a constraint on the variability of the 1313 data rate that an encoder or editing process may produce.". 1314 Applicable to the MPEG1, MPEG2, MPEG4 encoders. 1315 1316.. _v4l2-mpeg-video-vbv-delay: 1317 1318``V4L2_CID_MPEG_VIDEO_VBV_DELAY (integer)`` 1319 Sets the initial delay in milliseconds for VBV buffer control. 1320 1321.. _v4l2-mpeg-video-hor-search-range: 1322 1323``V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (integer)`` 1324 Horizontal search range defines maximum horizontal search area in 1325 pixels to search and match for the present Macroblock (MB) in the 1326 reference picture. This V4L2 control macro is used to set horizontal 1327 search range for motion estimation module in video encoder. 1328 1329.. _v4l2-mpeg-video-vert-search-range: 1330 1331``V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (integer)`` 1332 Vertical search range defines maximum vertical search area in pixels 1333 to search and match for the present Macroblock (MB) in the reference 1334 picture. This V4L2 control macro is used to set vertical search 1335 range for motion estimation module in video encoder. 1336 1337.. _v4l2-mpeg-video-force-key-frame: 1338 1339``V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (button)`` 1340 Force a key frame for the next queued buffer. Applicable to 1341 encoders. This is a general, codec-agnostic keyframe control. 1342 1343.. _v4l2-mpeg-video-h264-cpb-size: 1344 1345``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)`` 1346 The Coded Picture Buffer size in kilobytes, it is used as a 1347 limitation of frame skip. The CPB is defined in the H264 standard as 1348 a mean to verify that the produced stream will be successfully 1349 decoded. Applicable to the H264 encoder. 1350 1351``V4L2_CID_MPEG_VIDEO_H264_I_PERIOD (integer)`` 1352 Period between I-frames in the open GOP for H264. In case of an open 1353 GOP this is the period between two I-frames. The period between IDR 1354 (Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE 1355 control. An IDR frame, which stands for Instantaneous Decoding 1356 Refresh is an I-frame after which no prior frames are referenced. 1357 This means that a stream can be restarted from an IDR frame without 1358 the need to store or decode any previous frames. Applicable to the 1359 H264 encoder. 1360 1361.. _v4l2-mpeg-video-header-mode: 1362 1363``V4L2_CID_MPEG_VIDEO_HEADER_MODE`` 1364 (enum) 1365 1366enum v4l2_mpeg_video_header_mode - 1367 Determines whether the header is returned as the first buffer or is 1368 it returned together with the first frame. Applicable to encoders. 1369 Possible values are: 1370 1371.. raw:: latex 1372 1373 \small 1374 1375.. tabularcolumns:: |p{10.3cm}|p{7.2cm}| 1376 1377.. flat-table:: 1378 :header-rows: 0 1379 :stub-columns: 0 1380 1381 * - ``V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE`` 1382 - The stream header is returned separately in the first buffer. 1383 * - ``V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME`` 1384 - The stream header is returned together with the first encoded 1385 frame. 1386 1387.. raw:: latex 1388 1389 \normalsize 1390 1391 1392``V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (boolean)`` 1393 Repeat the video sequence headers. Repeating these headers makes 1394 random access to the video stream easier. Applicable to the MPEG1, 2 1395 and 4 encoder. 1396 1397``V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER (boolean)`` 1398 Enabled the deblocking post processing filter for MPEG4 decoder. 1399 Applicable to the MPEG4 decoder. 1400 1401``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES (integer)`` 1402 vop_time_increment_resolution value for MPEG4. Applicable to the 1403 MPEG4 encoder. 1404 1405``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC (integer)`` 1406 vop_time_increment value for MPEG4. Applicable to the MPEG4 1407 encoder. 1408 1409``V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING (boolean)`` 1410 Enable generation of frame packing supplemental enhancement 1411 information in the encoded bitstream. The frame packing SEI message 1412 contains the arrangement of L and R planes for 3D viewing. 1413 Applicable to the H264 encoder. 1414 1415``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0 (boolean)`` 1416 Sets current frame as frame0 in frame packing SEI. Applicable to the 1417 H264 encoder. 1418 1419.. _v4l2-mpeg-video-h264-sei-fp-arrangement-type: 1420 1421``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE`` 1422 (enum) 1423 1424enum v4l2_mpeg_video_h264_sei_fp_arrangement_type - 1425 Frame packing arrangement type for H264 SEI. Applicable to the H264 1426 encoder. Possible values are: 1427 1428.. raw:: latex 1429 1430 \small 1431 1432.. tabularcolumns:: |p{12cm}|p{5.5cm}| 1433 1434.. flat-table:: 1435 :header-rows: 0 1436 :stub-columns: 0 1437 1438 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD`` 1439 - Pixels are alternatively from L and R. 1440 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN`` 1441 - L and R are interlaced by column. 1442 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW`` 1443 - L and R are interlaced by row. 1444 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE`` 1445 - L is on the left, R on the right. 1446 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM`` 1447 - L is on top, R on bottom. 1448 * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL`` 1449 - One view per frame. 1450 1451.. raw:: latex 1452 1453 \normalsize 1454 1455 1456 1457``V4L2_CID_MPEG_VIDEO_H264_FMO (boolean)`` 1458 Enables flexible macroblock ordering in the encoded bitstream. It is 1459 a technique used for restructuring the ordering of macroblocks in 1460 pictures. Applicable to the H264 encoder. 1461 1462.. _v4l2-mpeg-video-h264-fmo-map-type: 1463 1464``V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE`` 1465 (enum) 1466 1467enum v4l2_mpeg_video_h264_fmo_map_type - 1468 When using FMO, the map type divides the image in different scan 1469 patterns of macroblocks. Applicable to the H264 encoder. Possible 1470 values are: 1471 1472.. raw:: latex 1473 1474 \small 1475 1476.. tabularcolumns:: |p{12.5cm}|p{5.0cm}| 1477 1478.. flat-table:: 1479 :header-rows: 0 1480 :stub-columns: 0 1481 1482 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES`` 1483 - Slices are interleaved one after other with macroblocks in run 1484 length order. 1485 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES`` 1486 - Scatters the macroblocks based on a mathematical function known to 1487 both encoder and decoder. 1488 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER`` 1489 - Macroblocks arranged in rectangular areas or regions of interest. 1490 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT`` 1491 - Slice groups grow in a cyclic way from centre to outwards. 1492 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN`` 1493 - Slice groups grow in raster scan pattern from left to right. 1494 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN`` 1495 - Slice groups grow in wipe scan pattern from top to bottom. 1496 * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT`` 1497 - User defined map type. 1498 1499.. raw:: latex 1500 1501 \normalsize 1502 1503 1504 1505``V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP (integer)`` 1506 Number of slice groups in FMO. Applicable to the H264 encoder. 1507 1508.. _v4l2-mpeg-video-h264-fmo-change-direction: 1509 1510``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION`` 1511 (enum) 1512 1513enum v4l2_mpeg_video_h264_fmo_change_dir - 1514 Specifies a direction of the slice group change for raster and wipe 1515 maps. Applicable to the H264 encoder. Possible values are: 1516 1517.. tabularcolumns:: |p{9.6cm}|p{7.9cm}| 1518 1519.. flat-table:: 1520 :header-rows: 0 1521 :stub-columns: 0 1522 1523 * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT`` 1524 - Raster scan or wipe right. 1525 * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT`` 1526 - Reverse raster scan or wipe left. 1527 1528 1529 1530``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE (integer)`` 1531 Specifies the size of the first slice group for raster and wipe map. 1532 Applicable to the H264 encoder. 1533 1534``V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH (integer)`` 1535 Specifies the number of consecutive macroblocks for the interleaved 1536 map. Applicable to the H264 encoder. 1537 1538``V4L2_CID_MPEG_VIDEO_H264_ASO (boolean)`` 1539 Enables arbitrary slice ordering in encoded bitstream. Applicable to 1540 the H264 encoder. 1541 1542``V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER (integer)`` 1543 Specifies the slice order in ASO. Applicable to the H264 encoder. 1544 The supplied 32-bit integer is interpreted as follows (bit 0 = least 1545 significant bit): 1546 1547 1548 1549.. flat-table:: 1550 :header-rows: 0 1551 :stub-columns: 0 1552 1553 * - Bit 0:15 1554 - Slice ID 1555 * - Bit 16:32 1556 - Slice position or order 1557 1558 1559 1560``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING (boolean)`` 1561 Enables H264 hierarchical coding. Applicable to the H264 encoder. 1562 1563.. _v4l2-mpeg-video-h264-hierarchical-coding-type: 1564 1565``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE`` 1566 (enum) 1567 1568enum v4l2_mpeg_video_h264_hierarchical_coding_type - 1569 Specifies the hierarchical coding type. Applicable to the H264 1570 encoder. Possible values are: 1571 1572 1573 1574.. flat-table:: 1575 :header-rows: 0 1576 :stub-columns: 0 1577 1578 * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B`` 1579 - Hierarchical B coding. 1580 * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P`` 1581 - Hierarchical P coding. 1582 1583 1584 1585``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (integer)`` 1586 Specifies the number of hierarchical coding layers. Applicable to 1587 the H264 encoder. 1588 1589``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (integer)`` 1590 Specifies a user defined QP for each layer. Applicable to the H264 1591 encoder. The supplied 32-bit integer is interpreted as follows (bit 1592 0 = least significant bit): 1593 1594 1595 1596.. flat-table:: 1597 :header-rows: 0 1598 :stub-columns: 0 1599 1600 * - Bit 0:15 1601 - QP value 1602 * - Bit 16:32 1603 - Layer number 1604 1605``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR (integer)`` 1606 Indicates bit rate (bps) for hierarchical coding layer 0 for H264 encoder. 1607 1608``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR (integer)`` 1609 Indicates bit rate (bps) for hierarchical coding layer 1 for H264 encoder. 1610 1611``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR (integer)`` 1612 Indicates bit rate (bps) for hierarchical coding layer 2 for H264 encoder. 1613 1614``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR (integer)`` 1615 Indicates bit rate (bps) for hierarchical coding layer 3 for H264 encoder. 1616 1617``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR (integer)`` 1618 Indicates bit rate (bps) for hierarchical coding layer 4 for H264 encoder. 1619 1620``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR (integer)`` 1621 Indicates bit rate (bps) for hierarchical coding layer 5 for H264 encoder. 1622 1623``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR (integer)`` 1624 Indicates bit rate (bps) for hierarchical coding layer 6 for H264 encoder. 1625 1626``V4L2_CID_FWHT_I_FRAME_QP (integer)`` 1627 Quantization parameter for an I frame for FWHT. Valid range: from 1 1628 to 31. 1629 1630``V4L2_CID_FWHT_P_FRAME_QP (integer)`` 1631 Quantization parameter for a P frame for FWHT. Valid range: from 1 1632 to 31. 1633 1634.. raw:: latex 1635 1636 \normalsize 1637 1638 1639MFC 5.1 MPEG Controls 1640===================== 1641 1642The following MPEG class controls deal with MPEG decoding and encoding 1643settings that are specific to the Multi Format Codec 5.1 device present 1644in the S5P family of SoCs by Samsung. 1645 1646 1647.. _mfc51-control-id: 1648 1649MFC 5.1 Control IDs 1650------------------- 1651 1652``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE (boolean)`` 1653 If the display delay is enabled then the decoder is forced to return 1654 a CAPTURE buffer (decoded frame) after processing a certain number 1655 of OUTPUT buffers. The delay can be set through 1656 ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY``. This 1657 feature can be used for example for generating thumbnails of videos. 1658 Applicable to the H264 decoder. 1659 1660 .. note:: 1661 1662 This control is deprecated. Use the standard 1663 ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE`` control instead. 1664 1665``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)`` 1666 Display delay value for H264 decoder. The decoder is forced to 1667 return a decoded frame after the set 'display delay' number of 1668 frames. If this number is low it may result in frames returned out 1669 of display order, in addition the hardware may still be using the 1670 returned buffer as a reference picture for subsequent frames. 1671 1672 .. note:: 1673 1674 This control is deprecated. Use the standard 1675 ``V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY`` control instead. 1676 1677``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)`` 1678 The number of reference pictures used for encoding a P picture. 1679 Applicable to the H264 encoder. 1680 1681``V4L2_CID_MPEG_MFC51_VIDEO_PADDING (boolean)`` 1682 Padding enable in the encoder - use a color instead of repeating 1683 border pixels. Applicable to encoders. 1684 1685``V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (integer)`` 1686 Padding color in the encoder. Applicable to encoders. The supplied 1687 32-bit integer is interpreted as follows (bit 0 = least significant 1688 bit): 1689 1690 1691 1692.. flat-table:: 1693 :header-rows: 0 1694 :stub-columns: 0 1695 1696 * - Bit 0:7 1697 - V chrominance information 1698 * - Bit 8:15 1699 - U chrominance information 1700 * - Bit 16:23 1701 - Y luminance information 1702 * - Bit 24:31 1703 - Must be zero. 1704 1705 1706 1707``V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (integer)`` 1708 Reaction coefficient for MFC rate control. Applicable to encoders. 1709 1710 .. note:: 1711 1712 #. Valid only when the frame level RC is enabled. 1713 1714 #. For tight CBR, this field must be small (ex. 2 ~ 10). For 1715 VBR, this field must be large (ex. 100 ~ 1000). 1716 1717 #. It is not recommended to use the greater number than 1718 FRAME_RATE * (10^9 / BIT_RATE). 1719 1720``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK (boolean)`` 1721 Adaptive rate control for dark region. Valid only when H.264 and 1722 macroblock level RC is enabled 1723 (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 1724 encoder. 1725 1726``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH (boolean)`` 1727 Adaptive rate control for smooth region. Valid only when H.264 and 1728 macroblock level RC is enabled 1729 (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 1730 encoder. 1731 1732``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC (boolean)`` 1733 Adaptive rate control for static region. Valid only when H.264 and 1734 macroblock level RC is enabled 1735 (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 1736 encoder. 1737 1738``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY (boolean)`` 1739 Adaptive rate control for activity region. Valid only when H.264 and 1740 macroblock level RC is enabled 1741 (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 1742 encoder. 1743 1744.. _v4l2-mpeg-mfc51-video-frame-skip-mode: 1745 1746``V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE`` 1747 (enum) 1748 1749 .. note:: 1750 1751 This control is deprecated. Use the standard 1752 ``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE`` control instead. 1753 1754enum v4l2_mpeg_mfc51_video_frame_skip_mode - 1755 Indicates in what conditions the encoder should skip frames. If 1756 encoding a frame would cause the encoded stream to be larger then a 1757 chosen data limit then the frame will be skipped. Possible values 1758 are: 1759 1760 1761.. tabularcolumns:: |p{9.4cm}|p{8.1cm}| 1762 1763.. raw:: latex 1764 1765 \small 1766 1767.. flat-table:: 1768 :header-rows: 0 1769 :stub-columns: 0 1770 1771 * - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_DISABLED`` 1772 - Frame skip mode is disabled. 1773 * - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT`` 1774 - Frame skip mode enabled and buffer limit is set by the chosen 1775 level and is defined by the standard. 1776 * - ``V4L2_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT`` 1777 - Frame skip mode enabled and buffer limit is set by the VBV 1778 (MPEG1/2/4) or CPB (H264) buffer size control. 1779 1780.. raw:: latex 1781 1782 \normalsize 1783 1784``V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (integer)`` 1785 Enable rate-control with fixed target bit. If this setting is 1786 enabled, then the rate control logic of the encoder will calculate 1787 the average bitrate for a GOP and keep it below or equal the set 1788 bitrate target. Otherwise the rate control logic calculates the 1789 overall average bitrate for the stream and keeps it below or equal 1790 to the set bitrate. In the first case the average bitrate for the 1791 whole stream will be smaller then the set bitrate. This is caused 1792 because the average is calculated for smaller number of frames, on 1793 the other hand enabling this setting will ensure that the stream 1794 will meet tight bandwidth constraints. Applicable to encoders. 1795 1796.. _v4l2-mpeg-mfc51-video-force-frame-type: 1797 1798``V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE`` 1799 (enum) 1800 1801enum v4l2_mpeg_mfc51_video_force_frame_type - 1802 Force a frame type for the next queued buffer. Applicable to 1803 encoders. Possible values are: 1804 1805.. tabularcolumns:: |p{9.9cm}|p{7.6cm}| 1806 1807.. flat-table:: 1808 :header-rows: 0 1809 :stub-columns: 0 1810 1811 * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED`` 1812 - Forcing a specific frame type disabled. 1813 * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME`` 1814 - Force an I-frame. 1815 * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED`` 1816 - Force a non-coded frame. 1817 1818 1819CX2341x MPEG Controls 1820===================== 1821 1822The following MPEG class controls deal with MPEG encoding settings that 1823are specific to the Conexant CX23415 and CX23416 MPEG encoding chips. 1824 1825 1826.. _cx2341x-control-id: 1827 1828CX2341x Control IDs 1829------------------- 1830 1831.. _v4l2-mpeg-cx2341x-video-spatial-filter-mode: 1832 1833``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE`` 1834 (enum) 1835 1836enum v4l2_mpeg_cx2341x_video_spatial_filter_mode - 1837 Sets the Spatial Filter mode (default ``MANUAL``). Possible values 1838 are: 1839 1840 1841.. tabularcolumns:: |p{11.5cm}|p{6.0cm}| 1842 1843.. flat-table:: 1844 :header-rows: 0 1845 :stub-columns: 0 1846 1847 * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL`` 1848 - Choose the filter manually 1849 * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO`` 1850 - Choose the filter automatically 1851 1852 1853 1854``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER (integer (0-15))`` 1855 The setting for the Spatial Filter. 0 = off, 15 = maximum. (Default 1856 is 0.) 1857 1858.. _luma-spatial-filter-type: 1859 1860``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE`` 1861 (enum) 1862 1863enum v4l2_mpeg_cx2341x_video_luma_spatial_filter_type - 1864 Select the algorithm to use for the Luma Spatial Filter (default 1865 ``1D_HOR``). Possible values: 1866 1867.. tabularcolumns:: |p{13.1cm}|p{4.4cm}| 1868 1869.. raw:: latex 1870 1871 \footnotesize 1872 1873.. flat-table:: 1874 :header-rows: 0 1875 :stub-columns: 0 1876 1877 * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF`` 1878 - No filter 1879 * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR`` 1880 - One-dimensional horizontal 1881 * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT`` 1882 - One-dimensional vertical 1883 * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE`` 1884 - Two-dimensional separable 1885 * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE`` 1886 - Two-dimensional symmetrical non-separable 1887 1888.. raw:: latex 1889 1890 \normalsize 1891 1892.. _chroma-spatial-filter-type: 1893 1894``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE`` 1895 (enum) 1896 1897enum v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type - 1898 Select the algorithm for the Chroma Spatial Filter (default 1899 ``1D_HOR``). Possible values are: 1900 1901.. raw:: latex 1902 1903 \footnotesize 1904 1905.. tabularcolumns:: |p{11.0cm}|p{6.5cm}| 1906 1907.. flat-table:: 1908 :header-rows: 0 1909 :stub-columns: 0 1910 1911 * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF`` 1912 - No filter 1913 * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR`` 1914 - One-dimensional horizontal 1915 1916.. raw:: latex 1917 1918 \normalsize 1919 1920.. _v4l2-mpeg-cx2341x-video-temporal-filter-mode: 1921 1922``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE`` 1923 (enum) 1924 1925enum v4l2_mpeg_cx2341x_video_temporal_filter_mode - 1926 Sets the Temporal Filter mode (default ``MANUAL``). Possible values 1927 are: 1928 1929.. raw:: latex 1930 1931 \footnotesize 1932 1933.. flat-table:: 1934 :header-rows: 0 1935 :stub-columns: 0 1936 1937 * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL`` 1938 - Choose the filter manually 1939 * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO`` 1940 - Choose the filter automatically 1941 1942.. raw:: latex 1943 1944 \normalsize 1945 1946``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER (integer (0-31))`` 1947 The setting for the Temporal Filter. 0 = off, 31 = maximum. (Default 1948 is 8 for full-scale capturing and 0 for scaled capturing.) 1949 1950.. _v4l2-mpeg-cx2341x-video-median-filter-type: 1951 1952``V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE`` 1953 (enum) 1954 1955enum v4l2_mpeg_cx2341x_video_median_filter_type - 1956 Median Filter Type (default ``OFF``). Possible values are: 1957 1958 1959.. raw:: latex 1960 1961 \small 1962 1963.. tabularcolumns:: |p{11.0cm}|p{6.5cm}| 1964 1965.. flat-table:: 1966 :header-rows: 0 1967 :stub-columns: 0 1968 1969 * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF`` 1970 - No filter 1971 * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR`` 1972 - Horizontal filter 1973 * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT`` 1974 - Vertical filter 1975 * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT`` 1976 - Horizontal and vertical filter 1977 * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG`` 1978 - Diagonal filter 1979 1980.. raw:: latex 1981 1982 \normalsize 1983 1984``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM (integer (0-255))`` 1985 Threshold above which the luminance median filter is enabled 1986 (default 0) 1987 1988``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP (integer (0-255))`` 1989 Threshold below which the luminance median filter is enabled 1990 (default 255) 1991 1992``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM (integer (0-255))`` 1993 Threshold above which the chroma median filter is enabled (default 1994 0) 1995 1996``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP (integer (0-255))`` 1997 Threshold below which the chroma median filter is enabled (default 1998 255) 1999 2000``V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS (boolean)`` 2001 The CX2341X MPEG encoder can insert one empty MPEG-2 PES packet into 2002 the stream between every four video frames. The packet size is 2048 2003 bytes, including the packet_start_code_prefix and stream_id 2004 fields. The stream_id is 0xBF (private stream 2). The payload 2005 consists of 0x00 bytes, to be filled in by the application. 0 = do 2006 not insert, 1 = insert packets. 2007 2008 2009VPX Control Reference 2010===================== 2011 2012The VPX controls include controls for encoding parameters of VPx video 2013codec. 2014 2015 2016.. _vpx-control-id: 2017 2018VPX Control IDs 2019--------------- 2020 2021.. _v4l2-vpx-num-partitions: 2022 2023``V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS`` 2024 (enum) 2025 2026enum v4l2_vp8_num_partitions - 2027 The number of token partitions to use in VP8 encoder. Possible 2028 values are: 2029 2030 2031 2032.. flat-table:: 2033 :header-rows: 0 2034 :stub-columns: 0 2035 2036 * - ``V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION`` 2037 - 1 coefficient partition 2038 * - ``V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS`` 2039 - 2 coefficient partitions 2040 * - ``V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS`` 2041 - 4 coefficient partitions 2042 * - ``V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS`` 2043 - 8 coefficient partitions 2044 2045 2046 2047``V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4 (boolean)`` 2048 Setting this prevents intra 4x4 mode in the intra mode decision. 2049 2050.. _v4l2-vpx-num-ref-frames: 2051 2052``V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES`` 2053 (enum) 2054 2055enum v4l2_vp8_num_ref_frames - 2056 The number of reference pictures for encoding P frames. Possible 2057 values are: 2058 2059.. tabularcolumns:: |p{7.5cm}|p{7.5cm}| 2060 2061.. raw:: latex 2062 2063 \small 2064 2065.. flat-table:: 2066 :header-rows: 0 2067 :stub-columns: 0 2068 2069 * - ``V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME`` 2070 - Last encoded frame will be searched 2071 * - ``V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME`` 2072 - Two frames will be searched among the last encoded frame, the 2073 golden frame and the alternate reference (altref) frame. The 2074 encoder implementation will decide which two are chosen. 2075 * - ``V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME`` 2076 - The last encoded frame, the golden frame and the altref frame will 2077 be searched. 2078 2079.. raw:: latex 2080 2081 \normalsize 2082 2083 2084 2085``V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL (integer)`` 2086 Indicates the loop filter level. The adjustment of the loop filter 2087 level is done via a delta value against a baseline loop filter 2088 value. 2089 2090``V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS (integer)`` 2091 This parameter affects the loop filter. Anything above zero weakens 2092 the deblocking effect on the loop filter. 2093 2094``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD (integer)`` 2095 Sets the refresh period for the golden frame. The period is defined 2096 in number of frames. For a value of 'n', every nth frame starting 2097 from the first key frame will be taken as a golden frame. For eg. 2098 for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden 2099 frame refresh period is set as 4, the frames 0, 4, 8 etc will be 2100 taken as the golden frames as frame 0 is always a key frame. 2101 2102.. _v4l2-vpx-golden-frame-sel: 2103 2104``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL`` 2105 (enum) 2106 2107enum v4l2_vp8_golden_frame_sel - 2108 Selects the golden frame for encoding. Possible values are: 2109 2110.. raw:: latex 2111 2112 \scriptsize 2113 2114.. tabularcolumns:: |p{8.6cm}|p{8.9cm}| 2115 2116.. flat-table:: 2117 :header-rows: 0 2118 :stub-columns: 0 2119 2120 * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV`` 2121 - Use the (n-2)th frame as a golden frame, current frame index being 2122 'n'. 2123 * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD`` 2124 - Use the previous specific frame indicated by 2125 ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD`` as a 2126 golden frame. 2127 2128.. raw:: latex 2129 2130 \normalsize 2131 2132 2133``V4L2_CID_MPEG_VIDEO_VPX_MIN_QP (integer)`` 2134 Minimum quantization parameter for VP8. 2135 2136``V4L2_CID_MPEG_VIDEO_VPX_MAX_QP (integer)`` 2137 Maximum quantization parameter for VP8. 2138 2139``V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP (integer)`` 2140 Quantization parameter for an I frame for VP8. 2141 2142``V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (integer)`` 2143 Quantization parameter for a P frame for VP8. 2144 2145.. _v4l2-mpeg-video-vp8-profile: 2146 2147``V4L2_CID_MPEG_VIDEO_VP8_PROFILE`` 2148 (enum) 2149 2150enum v4l2_mpeg_video_vp8_profile - 2151 This control allows selecting the profile for VP8 encoder. 2152 This is also used to enumerate supported profiles by VP8 encoder or decoder. 2153 Possible values are: 2154 2155.. flat-table:: 2156 :header-rows: 0 2157 :stub-columns: 0 2158 2159 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_0`` 2160 - Profile 0 2161 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_1`` 2162 - Profile 1 2163 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_2`` 2164 - Profile 2 2165 * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_3`` 2166 - Profile 3 2167 2168.. _v4l2-mpeg-video-vp9-profile: 2169 2170``V4L2_CID_MPEG_VIDEO_VP9_PROFILE`` 2171 (enum) 2172 2173enum v4l2_mpeg_video_vp9_profile - 2174 This control allows selecting the profile for VP9 encoder. 2175 This is also used to enumerate supported profiles by VP9 encoder or decoder. 2176 Possible values are: 2177 2178.. flat-table:: 2179 :header-rows: 0 2180 :stub-columns: 0 2181 2182 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_0`` 2183 - Profile 0 2184 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_1`` 2185 - Profile 1 2186 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_2`` 2187 - Profile 2 2188 * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3`` 2189 - Profile 3 2190 2191.. _v4l2-mpeg-video-vp9-level: 2192 2193``V4L2_CID_MPEG_VIDEO_VP9_LEVEL (enum)`` 2194 2195enum v4l2_mpeg_video_vp9_level - 2196 This control allows selecting the level for VP9 encoder. 2197 This is also used to enumerate supported levels by VP9 encoder or decoder. 2198 More information can be found at 2199 `webmproject <https://www.webmproject.org/vp9/levels/>`__. Possible values are: 2200 2201.. flat-table:: 2202 :header-rows: 0 2203 :stub-columns: 0 2204 2205 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_0`` 2206 - Level 1 2207 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_1`` 2208 - Level 1.1 2209 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_0`` 2210 - Level 2 2211 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_1`` 2212 - Level 2.1 2213 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_0`` 2214 - Level 3 2215 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_1`` 2216 - Level 3.1 2217 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_0`` 2218 - Level 4 2219 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_1`` 2220 - Level 4.1 2221 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_0`` 2222 - Level 5 2223 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_1`` 2224 - Level 5.1 2225 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_2`` 2226 - Level 5.2 2227 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_0`` 2228 - Level 6 2229 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_1`` 2230 - Level 6.1 2231 * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_2`` 2232 - Level 6.2 2233 2234 2235High Efficiency Video Coding (HEVC/H.265) Control Reference 2236=========================================================== 2237 2238The HEVC/H.265 controls include controls for encoding parameters of HEVC/H.265 2239video codec. 2240 2241 2242.. _hevc-control-id: 2243 2244HEVC/H.265 Control IDs 2245---------------------- 2246 2247``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)`` 2248 Minimum quantization parameter for HEVC. 2249 Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2250 2251``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)`` 2252 Maximum quantization parameter for HEVC. 2253 Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2254 2255``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)`` 2256 Quantization parameter for an I frame for HEVC. 2257 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2258 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2259 2260``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)`` 2261 Quantization parameter for a P frame for HEVC. 2262 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2263 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2264 2265``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)`` 2266 Quantization parameter for a B frame for HEVC. 2267 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2268 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2269 2270``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MIN_QP (integer)`` 2271 Minimum quantization parameter for the HEVC I frame to limit I frame 2272 quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2273 If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter 2274 should be chosen to meet both requirements. 2275 2276``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MAX_QP (integer)`` 2277 Maximum quantization parameter for the HEVC I frame to limit I frame 2278 quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2279 If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter 2280 should be chosen to meet both requirements. 2281 2282``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MIN_QP (integer)`` 2283 Minimum quantization parameter for the HEVC P frame to limit P frame 2284 quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2285 If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter 2286 should be chosen to meet both requirements. 2287 2288``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MAX_QP (integer)`` 2289 Maximum quantization parameter for the HEVC P frame to limit P frame 2290 quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2291 If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter 2292 should be chosen to meet both requirements. 2293 2294``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MIN_QP (integer)`` 2295 Minimum quantization parameter for the HEVC B frame to limit B frame 2296 quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2297 If V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP is also set, the quantization parameter 2298 should be chosen to meet both requirements. 2299 2300``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MAX_QP (integer)`` 2301 Maximum quantization parameter for the HEVC B frame to limit B frame 2302 quality to a range. Valid range: from 0 to 51 for 8 bit and from 0 to 63 for 10 bit. 2303 If V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP is also set, the quantization parameter 2304 should be chosen to meet both requirements. 2305 2306``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)`` 2307 HIERARCHICAL_QP allows the host to specify the quantization parameter 2308 values for each temporal layer through HIERARCHICAL_QP_LAYER. This is 2309 valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the 2310 control value to 1 enables setting of the QP values for the layers. 2311 2312.. _v4l2-hevc-hier-coding-type: 2313 2314``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE`` 2315 (enum) 2316 2317enum v4l2_mpeg_video_hevc_hier_coding_type - 2318 Selects the hierarchical coding type for encoding. Possible values are: 2319 2320.. raw:: latex 2321 2322 \footnotesize 2323 2324.. tabularcolumns:: |p{8.2cm}|p{9.3cm}| 2325 2326.. flat-table:: 2327 :header-rows: 0 2328 :stub-columns: 0 2329 2330 * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B`` 2331 - Use the B frame for hierarchical coding. 2332 * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P`` 2333 - Use the P frame for hierarchical coding. 2334 2335.. raw:: latex 2336 2337 \normalsize 2338 2339 2340``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)`` 2341 Selects the hierarchical coding layer. In normal encoding 2342 (non-hierarchial coding), it should be zero. Possible values are [0, 6]. 2343 0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates HIERARCHICAL CODING 2344 LAYER 1 and so on. 2345 2346``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)`` 2347 Indicates quantization parameter for hierarchical coding layer 0. 2348 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2349 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2350 2351``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)`` 2352 Indicates quantization parameter for hierarchical coding layer 1. 2353 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2354 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2355 2356``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)`` 2357 Indicates quantization parameter for hierarchical coding layer 2. 2358 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2359 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2360 2361``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)`` 2362 Indicates quantization parameter for hierarchical coding layer 3. 2363 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2364 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2365 2366``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)`` 2367 Indicates quantization parameter for hierarchical coding layer 4. 2368 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2369 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2370 2371``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)`` 2372 Indicates quantization parameter for hierarchical coding layer 5. 2373 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2374 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2375 2376``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)`` 2377 Indicates quantization parameter for hierarchical coding layer 6. 2378 Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, 2379 V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. 2380 2381.. _v4l2-hevc-profile: 2382 2383``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE`` 2384 (enum) 2385 2386enum v4l2_mpeg_video_hevc_profile - 2387 Select the desired profile for HEVC encoder. 2388 2389.. raw:: latex 2390 2391 \footnotesize 2392 2393.. tabularcolumns:: |p{9.0cm}|p{8.5cm}| 2394 2395.. flat-table:: 2396 :header-rows: 0 2397 :stub-columns: 0 2398 2399 * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN`` 2400 - Main profile. 2401 * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE`` 2402 - Main still picture profile. 2403 * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10`` 2404 - Main 10 profile. 2405 2406.. raw:: latex 2407 2408 \normalsize 2409 2410 2411.. _v4l2-hevc-level: 2412 2413``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL`` 2414 (enum) 2415 2416enum v4l2_mpeg_video_hevc_level - 2417 Selects the desired level for HEVC encoder. 2418 2419================================== ========= 2420``V4L2_MPEG_VIDEO_HEVC_LEVEL_1`` Level 1.0 2421``V4L2_MPEG_VIDEO_HEVC_LEVEL_2`` Level 2.0 2422``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1`` Level 2.1 2423``V4L2_MPEG_VIDEO_HEVC_LEVEL_3`` Level 3.0 2424``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1`` Level 3.1 2425``V4L2_MPEG_VIDEO_HEVC_LEVEL_4`` Level 4.0 2426``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1`` Level 4.1 2427``V4L2_MPEG_VIDEO_HEVC_LEVEL_5`` Level 5.0 2428``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1`` Level 5.1 2429``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2`` Level 5.2 2430``V4L2_MPEG_VIDEO_HEVC_LEVEL_6`` Level 6.0 2431``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1`` Level 6.1 2432``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2`` Level 6.2 2433================================== ========= 2434 2435``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)`` 2436 Indicates the number of evenly spaced subintervals, called ticks, within 2437 one second. This is a 16 bit unsigned integer and has a maximum value up to 2438 0xffff and a minimum value of 1. 2439 2440.. _v4l2-hevc-tier: 2441 2442``V4L2_CID_MPEG_VIDEO_HEVC_TIER`` 2443 (enum) 2444 2445enum v4l2_mpeg_video_hevc_tier - 2446 TIER_FLAG specifies tiers information of the HEVC encoded picture. Tier 2447 were made to deal with applications that differ in terms of maximum bit 2448 rate. Setting the flag to 0 selects HEVC tier as Main tier and setting 2449 this flag to 1 indicates High tier. High tier is for applications requiring 2450 high bit rates. 2451 2452================================== ========== 2453``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN`` Main tier. 2454``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH`` High tier. 2455================================== ========== 2456 2457 2458``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)`` 2459 Selects HEVC maximum coding unit depth. 2460 2461.. _v4l2-hevc-loop-filter-mode: 2462 2463``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE`` 2464 (enum) 2465 2466enum v4l2_mpeg_video_hevc_loop_filter_mode - 2467 Loop filter mode for HEVC encoder. Possible values are: 2468 2469.. raw:: latex 2470 2471 \footnotesize 2472 2473.. tabularcolumns:: |p{12.1cm}|p{5.4cm}| 2474 2475.. flat-table:: 2476 :header-rows: 0 2477 :stub-columns: 0 2478 2479 * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED`` 2480 - Loop filter is disabled. 2481 * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED`` 2482 - Loop filter is enabled. 2483 * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY`` 2484 - Loop filter is disabled at the slice boundary. 2485 2486.. raw:: latex 2487 2488 \normalsize 2489 2490 2491``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)`` 2492 Selects HEVC loop filter beta offset. The valid range is [-6, +6]. 2493 2494``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)`` 2495 Selects HEVC loop filter tc offset. The valid range is [-6, +6]. 2496 2497.. _v4l2-hevc-refresh-type: 2498 2499``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE`` 2500 (enum) 2501 2502enum v4l2_mpeg_video_hevc_hier_refresh_type - 2503 Selects refresh type for HEVC encoder. 2504 Host has to specify the period into 2505 V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD. 2506 2507.. raw:: latex 2508 2509 \footnotesize 2510 2511.. tabularcolumns:: |p{6.2cm}|p{11.3cm}| 2512 2513.. flat-table:: 2514 :header-rows: 0 2515 :stub-columns: 0 2516 2517 * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE`` 2518 - Use the B frame for hierarchical coding. 2519 * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA`` 2520 - Use CRA (Clean Random Access Unit) picture encoding. 2521 * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR`` 2522 - Use IDR (Instantaneous Decoding Refresh) picture encoding. 2523 2524.. raw:: latex 2525 2526 \normalsize 2527 2528 2529``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)`` 2530 Selects the refresh period for HEVC encoder. 2531 This specifies the number of I pictures between two CRA/IDR pictures. 2532 This is valid only if REFRESH_TYPE is not 0. 2533 2534``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)`` 2535 Indicates HEVC lossless encoding. Setting it to 0 disables lossless 2536 encoding. Setting it to 1 enables lossless encoding. 2537 2538``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)`` 2539 Indicates constant intra prediction for HEVC encoder. Specifies the 2540 constrained intra prediction in which intra largest coding unit (LCU) 2541 prediction is performed by using residual data and decoded samples of 2542 neighboring intra LCU only. Setting the value to 1 enables constant intra 2543 prediction and setting the value to 0 disables constant intra prediction. 2544 2545``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)`` 2546 Indicates wavefront parallel processing for HEVC encoder. Setting it to 0 2547 disables the feature and setting it to 1 enables the wavefront parallel 2548 processing. 2549 2550``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)`` 2551 Setting the value to 1 enables combination of P and B frame for HEVC 2552 encoder. 2553 2554``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)`` 2555 Indicates temporal identifier for HEVC encoder which is enabled by 2556 setting the value to 1. 2557 2558``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)`` 2559 Indicates bi-linear interpolation is conditionally used in the intra 2560 prediction filtering process in the CVS when set to 1. Indicates bi-linear 2561 interpolation is not used in the CVS when set to 0. 2562 2563``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)`` 2564 Indicates maximum number of merge candidate motion vectors. 2565 Values are from 0 to 4. 2566 2567``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)`` 2568 Indicates temporal motion vector prediction for HEVC encoder. Setting it to 2569 1 enables the prediction. Setting it to 0 disables the prediction. 2570 2571``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)`` 2572 Specifies if HEVC generates a stream with a size of the length field 2573 instead of start code pattern. The size of the length field is configurable 2574 through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD control. Setting 2575 the value to 0 disables encoding without startcode pattern. Setting the 2576 value to 1 will enables encoding without startcode pattern. 2577 2578.. _v4l2-hevc-size-of-length-field: 2579 2580``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD`` 2581(enum) 2582 2583enum v4l2_mpeg_video_hevc_size_of_length_field - 2584 Indicates the size of length field. 2585 This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled. 2586 2587.. raw:: latex 2588 2589 \footnotesize 2590 2591.. tabularcolumns:: |p{5.5cm}|p{12.0cm}| 2592 2593.. flat-table:: 2594 :header-rows: 0 2595 :stub-columns: 0 2596 2597 * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0`` 2598 - Generate start code pattern (Normal). 2599 * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1`` 2600 - Generate size of length field instead of start code pattern and length is 1. 2601 * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2`` 2602 - Generate size of length field instead of start code pattern and length is 2. 2603 * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4`` 2604 - Generate size of length field instead of start code pattern and length is 4. 2605 2606.. raw:: latex 2607 2608 \normalsize 2609 2610``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)`` 2611 Indicates bit rate for hierarchical coding layer 0 for HEVC encoder. 2612 2613``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)`` 2614 Indicates bit rate for hierarchical coding layer 1 for HEVC encoder. 2615 2616``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)`` 2617 Indicates bit rate for hierarchical coding layer 2 for HEVC encoder. 2618 2619``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)`` 2620 Indicates bit rate for hierarchical coding layer 3 for HEVC encoder. 2621 2622``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)`` 2623 Indicates bit rate for hierarchical coding layer 4 for HEVC encoder. 2624 2625``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)`` 2626 Indicates bit rate for hierarchical coding layer 5 for HEVC encoder. 2627 2628``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)`` 2629 Indicates bit rate for hierarchical coding layer 6 for HEVC encoder. 2630 2631``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)`` 2632 Selects number of P reference pictures required for HEVC encoder. 2633 P-Frame can use 1 or 2 frames for reference. 2634 2635``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)`` 2636 Indicates whether to generate SPS and PPS at every IDR. Setting it to 0 2637 disables generating SPS and PPS at every IDR. Setting it to one enables 2638 generating SPS and PPS at every IDR. 2639 2640.. _v4l2-mpeg-hevc: 2641 2642``V4L2_CID_MPEG_VIDEO_HEVC_SPS (struct)`` 2643 Specifies the Sequence Parameter Set fields (as extracted from the 2644 bitstream) for the associated HEVC slice data. 2645 These bitstream parameters are defined according to :ref:`hevc`. 2646 They are described in section 7.4.3.2 "Sequence parameter set RBSP 2647 semantics" of the specification. 2648 2649.. c:type:: v4l2_ctrl_hevc_sps 2650 2651.. raw:: latex 2652 2653 \small 2654 2655.. tabularcolumns:: |p{1.2cm}|p{9.2cm}|p{6.9cm}| 2656 2657.. cssclass:: longtable 2658 2659.. flat-table:: struct v4l2_ctrl_hevc_sps 2660 :header-rows: 0 2661 :stub-columns: 0 2662 :widths: 1 1 2 2663 2664 * - __u16 2665 - ``pic_width_in_luma_samples`` 2666 - 2667 * - __u16 2668 - ``pic_height_in_luma_samples`` 2669 - 2670 * - __u8 2671 - ``bit_depth_luma_minus8`` 2672 - 2673 * - __u8 2674 - ``bit_depth_chroma_minus8`` 2675 - 2676 * - __u8 2677 - ``log2_max_pic_order_cnt_lsb_minus4`` 2678 - 2679 * - __u8 2680 - ``sps_max_dec_pic_buffering_minus1`` 2681 - 2682 * - __u8 2683 - ``sps_max_num_reorder_pics`` 2684 - 2685 * - __u8 2686 - ``sps_max_latency_increase_plus1`` 2687 - 2688 * - __u8 2689 - ``log2_min_luma_coding_block_size_minus3`` 2690 - 2691 * - __u8 2692 - ``log2_diff_max_min_luma_coding_block_size`` 2693 - 2694 * - __u8 2695 - ``log2_min_luma_transform_block_size_minus2`` 2696 - 2697 * - __u8 2698 - ``log2_diff_max_min_luma_transform_block_size`` 2699 - 2700 * - __u8 2701 - ``max_transform_hierarchy_depth_inter`` 2702 - 2703 * - __u8 2704 - ``max_transform_hierarchy_depth_intra`` 2705 - 2706 * - __u8 2707 - ``pcm_sample_bit_depth_luma_minus1`` 2708 - 2709 * - __u8 2710 - ``pcm_sample_bit_depth_chroma_minus1`` 2711 - 2712 * - __u8 2713 - ``log2_min_pcm_luma_coding_block_size_minus3`` 2714 - 2715 * - __u8 2716 - ``log2_diff_max_min_pcm_luma_coding_block_size`` 2717 - 2718 * - __u8 2719 - ``num_short_term_ref_pic_sets`` 2720 - 2721 * - __u8 2722 - ``num_long_term_ref_pics_sps`` 2723 - 2724 * - __u8 2725 - ``chroma_format_idc`` 2726 - 2727 * - __u8 2728 - ``sps_max_sub_layers_minus1`` 2729 - 2730 * - __u64 2731 - ``flags`` 2732 - See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>` 2733 2734.. raw:: latex 2735 2736 \normalsize 2737 2738.. _hevc_sps_flags: 2739 2740``Sequence Parameter Set Flags`` 2741 2742.. raw:: latex 2743 2744 \small 2745 2746.. cssclass:: longtable 2747 2748.. flat-table:: 2749 :header-rows: 0 2750 :stub-columns: 0 2751 :widths: 1 1 2 2752 2753 * - ``V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE`` 2754 - 0x00000001 2755 - 2756 * - ``V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED`` 2757 - 0x00000002 2758 - 2759 * - ``V4L2_HEVC_SPS_FLAG_AMP_ENABLED`` 2760 - 0x00000004 2761 - 2762 * - ``V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET`` 2763 - 0x00000008 2764 - 2765 * - ``V4L2_HEVC_SPS_FLAG_PCM_ENABLED`` 2766 - 0x00000010 2767 - 2768 * - ``V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED`` 2769 - 0x00000020 2770 - 2771 * - ``V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT`` 2772 - 0x00000040 2773 - 2774 * - ``V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED`` 2775 - 0x00000080 2776 - 2777 * - ``V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED`` 2778 - 0x00000100 2779 - 2780 2781.. raw:: latex 2782 2783 \normalsize 2784 2785``V4L2_CID_MPEG_VIDEO_HEVC_PPS (struct)`` 2786 Specifies the Picture Parameter Set fields (as extracted from the 2787 bitstream) for the associated HEVC slice data. 2788 These bitstream parameters are defined according to :ref:`hevc`. 2789 They are described in section 7.4.3.3 "Picture parameter set RBSP 2790 semantics" of the specification. 2791 2792.. c:type:: v4l2_ctrl_hevc_pps 2793 2794.. tabularcolumns:: |p{1.2cm}|p{8.6cm}|p{7.5cm}| 2795 2796.. cssclass:: longtable 2797 2798.. flat-table:: struct v4l2_ctrl_hevc_pps 2799 :header-rows: 0 2800 :stub-columns: 0 2801 :widths: 1 1 2 2802 2803 * - __u8 2804 - ``num_extra_slice_header_bits`` 2805 - 2806 * - __u8 2807 - ``num_ref_idx_l0_default_active_minus1`` 2808 - Specifies the inferred value of num_ref_idx_l0_active_minus1 2809 * - __u8 2810 - ``num_ref_idx_l1_default_active_minus1`` 2811 - Specifies the inferred value of num_ref_idx_l1_active_minus1 2812 * - __s8 2813 - ``init_qp_minus26`` 2814 - 2815 * - __u8 2816 - ``diff_cu_qp_delta_depth`` 2817 - 2818 * - __s8 2819 - ``pps_cb_qp_offset`` 2820 - 2821 * - __s8 2822 - ``pps_cr_qp_offset`` 2823 - 2824 * - __u8 2825 - ``num_tile_columns_minus1`` 2826 - 2827 * - __u8 2828 - ``num_tile_rows_minus1`` 2829 - 2830 * - __u8 2831 - ``column_width_minus1[20]`` 2832 - 2833 * - __u8 2834 - ``row_height_minus1[22]`` 2835 - 2836 * - __s8 2837 - ``pps_beta_offset_div2`` 2838 - 2839 * - __s8 2840 - ``pps_tc_offset_div2`` 2841 - 2842 * - __u8 2843 - ``log2_parallel_merge_level_minus2`` 2844 - 2845 * - __u8 2846 - ``padding[4]`` 2847 - Applications and drivers must set this to zero. 2848 * - __u64 2849 - ``flags`` 2850 - See :ref:`Picture Parameter Set Flags <hevc_pps_flags>` 2851 2852.. _hevc_pps_flags: 2853 2854``Picture Parameter Set Flags`` 2855 2856.. raw:: latex 2857 2858 \small 2859 2860.. flat-table:: 2861 :header-rows: 0 2862 :stub-columns: 0 2863 :widths: 1 1 2 2864 2865 * - ``V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT_ENABLED`` 2866 - 0x00000001 2867 - 2868 * - ``V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT`` 2869 - 0x00000002 2870 - 2871 * - ``V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED`` 2872 - 0x00000004 2873 - 2874 * - ``V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT`` 2875 - 0x00000008 2876 - 2877 * - ``V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED`` 2878 - 0x00000010 2879 - 2880 * - ``V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED`` 2881 - 0x00000020 2882 - 2883 * - ``V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED`` 2884 - 0x00000040 2885 - 2886 * - ``V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT`` 2887 - 0x00000080 2888 - 2889 * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED`` 2890 - 0x00000100 2891 - 2892 * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED`` 2893 - 0x00000200 2894 - 2895 * - ``V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED`` 2896 - 0x00000400 2897 - 2898 * - ``V4L2_HEVC_PPS_FLAG_TILES_ENABLED`` 2899 - 0x00000800 2900 - 2901 * - ``V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED`` 2902 - 0x00001000 2903 - 2904 * - ``V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED`` 2905 - 0x00002000 2906 - 2907 * - ``V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED`` 2908 - 0x00004000 2909 - 2910 * - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED`` 2911 - 0x00008000 2912 - 2913 * - ``V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER`` 2914 - 0x00010000 2915 - 2916 * - ``V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT`` 2917 - 0x00020000 2918 - 2919 * - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT`` 2920 - 0x00040000 2921 - 2922 * - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT`` 2923 - 0x00080000 2924 - Specifies the presence of deblocking filter control syntax elements in 2925 the PPS 2926 * - ``V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING`` 2927 - 0x00100000 2928 - Specifies that tile column boundaries and likewise tile row boundaries 2929 are distributed uniformly across the picture 2930 2931.. raw:: latex 2932 2933 \normalsize 2934 2935``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (struct)`` 2936 Specifies various slice-specific parameters, especially from the NAL unit 2937 header, general slice segment header and weighted prediction parameter 2938 parts of the bitstream. 2939 These bitstream parameters are defined according to :ref:`hevc`. 2940 They are described in section 7.4.7 "General slice segment header 2941 semantics" of the specification. 2942 2943.. c:type:: v4l2_ctrl_hevc_slice_params 2944 2945.. raw:: latex 2946 2947 \scriptsize 2948 2949.. tabularcolumns:: |p{5.4cm}|p{6.8cm}|p{5.1cm}| 2950 2951.. cssclass:: longtable 2952 2953.. flat-table:: struct v4l2_ctrl_hevc_slice_params 2954 :header-rows: 0 2955 :stub-columns: 0 2956 :widths: 1 1 2 2957 2958 * - __u32 2959 - ``bit_size`` 2960 - Size (in bits) of the current slice data. 2961 * - __u32 2962 - ``data_bit_offset`` 2963 - Offset (in bits) to the video data in the current slice data. 2964 * - __u8 2965 - ``nal_unit_type`` 2966 - 2967 * - __u8 2968 - ``nuh_temporal_id_plus1`` 2969 - 2970 * - __u8 2971 - ``slice_type`` 2972 - 2973 (V4L2_HEVC_SLICE_TYPE_I, V4L2_HEVC_SLICE_TYPE_P or 2974 V4L2_HEVC_SLICE_TYPE_B). 2975 * - __u8 2976 - ``colour_plane_id`` 2977 - 2978 * - __u16 2979 - ``slice_pic_order_cnt`` 2980 - 2981 * - __u8 2982 - ``num_ref_idx_l0_active_minus1`` 2983 - 2984 * - __u8 2985 - ``num_ref_idx_l1_active_minus1`` 2986 - 2987 * - __u8 2988 - ``collocated_ref_idx`` 2989 - 2990 * - __u8 2991 - ``five_minus_max_num_merge_cand`` 2992 - 2993 * - __s8 2994 - ``slice_qp_delta`` 2995 - 2996 * - __s8 2997 - ``slice_cb_qp_offset`` 2998 - 2999 * - __s8 3000 - ``slice_cr_qp_offset`` 3001 - 3002 * - __s8 3003 - ``slice_act_y_qp_offset`` 3004 - 3005 * - __s8 3006 - ``slice_act_cb_qp_offset`` 3007 - 3008 * - __s8 3009 - ``slice_act_cr_qp_offset`` 3010 - 3011 * - __s8 3012 - ``slice_beta_offset_div2`` 3013 - 3014 * - __s8 3015 - ``slice_tc_offset_div2`` 3016 - 3017 * - __u8 3018 - ``pic_struct`` 3019 - 3020 * - __u32 3021 - ``slice_segment_addr`` 3022 - 3023 * - __u8 3024 - ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3025 - The list of L0 reference elements as indices in the DPB. 3026 * - __u8 3027 - ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3028 - The list of L1 reference elements as indices in the DPB. 3029 * - __u8 3030 - ``padding`` 3031 - Applications and drivers must set this to zero. 3032 * - struct :c:type:`v4l2_hevc_pred_weight_table` 3033 - ``pred_weight_table`` 3034 - The prediction weight coefficients for inter-picture prediction. 3035 * - __u64 3036 - ``flags`` 3037 - See :ref:`Slice Parameters Flags <hevc_slice_params_flags>` 3038 3039.. raw:: latex 3040 3041 \normalsize 3042 3043.. _hevc_slice_params_flags: 3044 3045``Slice Parameters Flags`` 3046 3047.. raw:: latex 3048 3049 \scriptsize 3050 3051.. flat-table:: 3052 :header-rows: 0 3053 :stub-columns: 0 3054 :widths: 1 1 2 3055 3056 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA`` 3057 - 0x00000001 3058 - 3059 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA`` 3060 - 0x00000002 3061 - 3062 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED`` 3063 - 0x00000004 3064 - 3065 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO`` 3066 - 0x00000008 3067 - 3068 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT`` 3069 - 0x00000010 3070 - 3071 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0`` 3072 - 0x00000020 3073 - 3074 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV`` 3075 - 0x00000040 3076 - 3077 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED`` 3078 - 0x00000080 3079 - 3080 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED`` 3081 - 0x00000100 3082 - 3083 * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT`` 3084 - 0x00000200 3085 - 3086 3087.. raw:: latex 3088 3089 \normalsize 3090 3091``V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX (struct)`` 3092 Specifies the HEVC scaling matrix parameters used for the scaling process 3093 for transform coefficients. 3094 These matrix and parameters are defined according to :ref:`hevc`. 3095 They are described in section 7.4.5 "Scaling list data semantics" of 3096 the specification. 3097 3098.. c:type:: v4l2_ctrl_hevc_scaling_matrix 3099 3100.. raw:: latex 3101 3102 \scriptsize 3103 3104.. tabularcolumns:: |p{5.4cm}|p{6.8cm}|p{5.1cm}| 3105 3106.. cssclass:: longtable 3107 3108.. flat-table:: struct v4l2_ctrl_hevc_scaling_matrix 3109 :header-rows: 0 3110 :stub-columns: 0 3111 :widths: 1 1 2 3112 3113 * - __u8 3114 - ``scaling_list_4x4[6][16]`` 3115 - Scaling list is used for the scaling process for transform 3116 coefficients. The values on each scaling list are expected 3117 in raster scan order. 3118 * - __u8 3119 - ``scaling_list_8x8[6][64]`` 3120 - Scaling list is used for the scaling process for transform 3121 coefficients. The values on each scaling list are expected 3122 in raster scan order. 3123 * - __u8 3124 - ``scaling_list_16x16[6][64]`` 3125 - Scaling list is used for the scaling process for transform 3126 coefficients. The values on each scaling list are expected 3127 in raster scan order. 3128 * - __u8 3129 - ``scaling_list_32x32[2][64]`` 3130 - Scaling list is used for the scaling process for transform 3131 coefficients. The values on each scaling list are expected 3132 in raster scan order. 3133 * - __u8 3134 - ``scaling_list_dc_coef_16x16[6]`` 3135 - Scaling list is used for the scaling process for transform 3136 coefficients. The values on each scaling list are expected 3137 in raster scan order. 3138 * - __u8 3139 - ``scaling_list_dc_coef_32x32[2]`` 3140 - Scaling list is used for the scaling process for transform 3141 coefficients. The values on each scaling list are expected 3142 in raster scan order. 3143 3144.. raw:: latex 3145 3146 \normalsize 3147 3148.. c:type:: v4l2_hevc_dpb_entry 3149 3150.. raw:: latex 3151 3152 \small 3153 3154.. tabularcolumns:: |p{1.0cm}|p{4.2cm}|p{12.1cm}| 3155 3156.. flat-table:: struct v4l2_hevc_dpb_entry 3157 :header-rows: 0 3158 :stub-columns: 0 3159 :widths: 1 1 2 3160 3161 * - __u64 3162 - ``timestamp`` 3163 - Timestamp of the V4L2 capture buffer to use as reference, used 3164 with B-coded and P-coded frames. The timestamp refers to the 3165 ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the 3166 :c:func:`v4l2_timeval_to_ns()` function to convert the struct 3167 :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. 3168 * - __u8 3169 - ``rps`` 3170 - The reference set for the reference frame 3171 (V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_BEFORE, 3172 V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_AFTER or 3173 V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR) 3174 * - __u8 3175 - ``field_pic`` 3176 - Whether the reference is a field picture or a frame. 3177 * - __u16 3178 - ``pic_order_cnt[2]`` 3179 - The picture order count of the reference. Only the first element of the 3180 array is used for frame pictures, while the first element identifies the 3181 top field and the second the bottom field in field-coded pictures. 3182 * - __u8 3183 - ``padding[2]`` 3184 - Applications and drivers must set this to zero. 3185 3186.. raw:: latex 3187 3188 \normalsize 3189 3190.. c:type:: v4l2_hevc_pred_weight_table 3191 3192.. raw:: latex 3193 3194 \footnotesize 3195 3196.. tabularcolumns:: |p{0.8cm}|p{10.6cm}|p{5.9cm}| 3197 3198.. flat-table:: struct v4l2_hevc_pred_weight_table 3199 :header-rows: 0 3200 :stub-columns: 0 3201 :widths: 1 1 2 3202 3203 * - __u8 3204 - ``luma_log2_weight_denom`` 3205 - 3206 * - __s8 3207 - ``delta_chroma_log2_weight_denom`` 3208 - 3209 * - __s8 3210 - ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3211 - 3212 * - __s8 3213 - ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3214 - 3215 * - __s8 3216 - ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` 3217 - 3218 * - __s8 3219 - ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` 3220 - 3221 * - __s8 3222 - ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3223 - 3224 * - __s8 3225 - ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3226 - 3227 * - __s8 3228 - ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` 3229 - 3230 * - __s8 3231 - ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` 3232 - 3233 * - __u8 3234 - ``padding[6]`` 3235 - Applications and drivers must set this to zero. 3236 3237.. raw:: latex 3238 3239 \normalsize 3240 3241``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (enum)`` 3242 Specifies the decoding mode to use. Currently exposes slice-based and 3243 frame-based decoding but new modes might be added later on. 3244 This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE 3245 pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE 3246 are required to set this control in order to specify the decoding mode 3247 that is expected for the buffer. 3248 Drivers may expose a single or multiple decoding modes, depending 3249 on what they can support. 3250 3251 .. note:: 3252 3253 This menu control is not yet part of the public kernel API and 3254 it is expected to change. 3255 3256.. c:type:: v4l2_mpeg_video_hevc_decode_mode 3257 3258.. raw:: latex 3259 3260 \small 3261 3262.. tabularcolumns:: |p{9.4cm}|p{0.6cm}|p{7.3cm}| 3263 3264.. flat-table:: 3265 :header-rows: 0 3266 :stub-columns: 0 3267 :widths: 1 1 2 3268 3269 * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED`` 3270 - 0 3271 - Decoding is done at the slice granularity. 3272 The OUTPUT buffer must contain a single slice. 3273 * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_FRAME_BASED`` 3274 - 1 3275 - Decoding is done at the frame granularity. 3276 The OUTPUT buffer must contain all slices needed to decode the 3277 frame. The OUTPUT buffer must also contain both fields. 3278 3279.. raw:: latex 3280 3281 \normalsize 3282 3283``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (enum)`` 3284 Specifies the HEVC slice start code expected for each slice. 3285 This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE 3286 pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE 3287 are required to set this control in order to specify the start code 3288 that is expected for the buffer. 3289 Drivers may expose a single or multiple start codes, depending 3290 on what they can support. 3291 3292 .. note:: 3293 3294 This menu control is not yet part of the public kernel API and 3295 it is expected to change. 3296 3297.. c:type:: v4l2_mpeg_video_hevc_start_code 3298 3299.. tabularcolumns:: |p{9.2cm}|p{0.6cm}|p{7.5cm}| 3300 3301.. flat-table:: 3302 :header-rows: 0 3303 :stub-columns: 0 3304 :widths: 1 1 2 3305 3306 * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_NONE`` 3307 - 0 3308 - Selecting this value specifies that HEVC slices are passed 3309 to the driver without any start code. The bitstream data should be 3310 according to :ref:`hevc` 7.3.1.1 General NAL unit syntax, hence 3311 contains emulation prevention bytes when required. 3312 * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_ANNEX_B`` 3313 - 1 3314 - Selecting this value specifies that HEVC slices are expected 3315 to be prefixed by Annex B start codes. According to :ref:`hevc` 3316 valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001. 3317 3318``V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID (integer)`` 3319 Specifies a priority identifier for the NAL unit, which will be applied to 3320 the base layer. By default this value is set to 0 for the base layer, 3321 and the next layer will have the priority ID assigned as 1, 2, 3 and so on. 3322 The video encoder can't decide the priority id to be applied to a layer, 3323 so this has to come from client. 3324 This is applicable to H264 and valid Range is from 0 to 63. 3325 Source Rec. ITU-T H.264 (06/2019); G.7.4.1.1, G.8.8.1. 3326 3327``V4L2_CID_MPEG_VIDEO_LTR_COUNT (integer)`` 3328 Specifies the maximum number of Long Term Reference (LTR) frames at any 3329 given time that the encoder can keep. 3330 This is applicable to the H264 and HEVC encoders. 3331 3332``V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX (integer)`` 3333 After setting this control the frame that will be queued next 3334 will be marked as a Long Term Reference (LTR) frame 3335 and given this LTR index which ranges from 0 to LTR_COUNT-1. 3336 This is applicable to the H264 and HEVC encoders. 3337 Source Rec. ITU-T H.264 (06/2019); Table 7.9 3338 3339``V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES (bitmask)`` 3340 Specifies the Long Term Reference (LTR) frame(s) to be used for 3341 encoding the next frame queued after setting this control. 3342 This provides a bitmask which consists of bits [0, LTR_COUNT-1]. 3343 This is applicable to the H264 and HEVC encoders. 3344 3345``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS (struct)`` 3346 Specifies various decode parameters, especially the references picture order 3347 count (POC) for all the lists (short, long, before, current, after) and the 3348 number of entries for each of them. 3349 These parameters are defined according to :ref:`hevc`. 3350 They are described in section 8.3 "Slice decoding process" of the 3351 specification. 3352 3353.. c:type:: v4l2_ctrl_hevc_decode_params 3354 3355.. cssclass:: longtable 3356 3357.. flat-table:: struct v4l2_ctrl_hevc_decode_params 3358 :header-rows: 0 3359 :stub-columns: 0 3360 :widths: 1 1 2 3361 3362 * - __s32 3363 - ``pic_order_cnt_val`` 3364 - PicOrderCntVal as described in section 8.3.1 "Decoding process 3365 for picture order count" of the specification. 3366 * - __u8 3367 - ``num_active_dpb_entries`` 3368 - The number of entries in ``dpb``. 3369 * - struct :c:type:`v4l2_hevc_dpb_entry` 3370 - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3371 - The decoded picture buffer, for meta-data about reference frames. 3372 * - __u8 3373 - ``num_poc_st_curr_before`` 3374 - The number of reference pictures in the short-term set that come before 3375 the current frame. 3376 * - __u8 3377 - ``num_poc_st_curr_after`` 3378 - The number of reference pictures in the short-term set that come after 3379 the current frame. 3380 * - __u8 3381 - ``num_poc_lt_curr`` 3382 - The number of reference pictures in the long-term set. 3383 * - __u8 3384 - ``poc_st_curr_before[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3385 - PocStCurrBefore as described in section 8.3.2 "Decoding process for reference 3386 picture set. 3387 * - __u8 3388 - ``poc_st_curr_after[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3389 - PocStCurrAfter as described in section 8.3.2 "Decoding process for reference 3390 picture set. 3391 * - __u8 3392 - ``poc_lt_curr[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` 3393 - PocLtCurr as described in section 8.3.2 "Decoding process for reference 3394 picture set. 3395 * - __u64 3396 - ``flags`` 3397 - See :ref:`Decode Parameters Flags <hevc_decode_params_flags>` 3398 3399.. _hevc_decode_params_flags: 3400 3401``Decode Parameters Flags`` 3402 3403.. cssclass:: longtable 3404 3405.. flat-table:: 3406 :header-rows: 0 3407 :stub-columns: 0 3408 :widths: 1 1 2 3409 3410 * - ``V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC`` 3411 - 0x00000001 3412 - 3413 * - ``V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC`` 3414 - 0x00000002 3415 - 3416 * - ``V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR`` 3417 - 0x00000004 3418 - 3419