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video.h
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1 /*
2  * USB Video Class definitions.
3  *
4  * Copyright (C) 2009 Laurent Pinchart <[email protected]>
5  *
6  * This file holds USB constants and structures defined by the USB Device
7  * Class Definition for Video Devices. Unless otherwise stated, comments
8  * below reference relevant sections of the USB Video Class 1.1 specification
9  * available at
10  *
11  * http://www.usb.org/developers/devclass_docs/USB_Video_Class_1_1.zip
12  */
13 
14 #ifndef __LINUX_USB_VIDEO_H
15 #define __LINUX_USB_VIDEO_H
16 
17 #include <linux/types.h>
18 
19 /* --------------------------------------------------------------------------
20  * UVC constants
21  */
22 
23 /* A.2. Video Interface Subclass Codes */
24 #define UVC_SC_UNDEFINED 0x00
25 #define UVC_SC_VIDEOCONTROL 0x01
26 #define UVC_SC_VIDEOSTREAMING 0x02
27 #define UVC_SC_VIDEO_INTERFACE_COLLECTION 0x03
28 
29 /* A.3. Video Interface Protocol Codes */
30 #define UVC_PC_PROTOCOL_UNDEFINED 0x00
31 
32 /* A.5. Video Class-Specific VC Interface Descriptor Subtypes */
33 #define UVC_VC_DESCRIPTOR_UNDEFINED 0x00
34 #define UVC_VC_HEADER 0x01
35 #define UVC_VC_INPUT_TERMINAL 0x02
36 #define UVC_VC_OUTPUT_TERMINAL 0x03
37 #define UVC_VC_SELECTOR_UNIT 0x04
38 #define UVC_VC_PROCESSING_UNIT 0x05
39 #define UVC_VC_EXTENSION_UNIT 0x06
40 
41 /* A.6. Video Class-Specific VS Interface Descriptor Subtypes */
42 #define UVC_VS_UNDEFINED 0x00
43 #define UVC_VS_INPUT_HEADER 0x01
44 #define UVC_VS_OUTPUT_HEADER 0x02
45 #define UVC_VS_STILL_IMAGE_FRAME 0x03
46 #define UVC_VS_FORMAT_UNCOMPRESSED 0x04
47 #define UVC_VS_FRAME_UNCOMPRESSED 0x05
48 #define UVC_VS_FORMAT_MJPEG 0x06
49 #define UVC_VS_FRAME_MJPEG 0x07
50 #define UVC_VS_FORMAT_MPEG2TS 0x0a
51 #define UVC_VS_FORMAT_DV 0x0c
52 #define UVC_VS_COLORFORMAT 0x0d
53 #define UVC_VS_FORMAT_FRAME_BASED 0x10
54 #define UVC_VS_FRAME_FRAME_BASED 0x11
55 #define UVC_VS_FORMAT_STREAM_BASED 0x12
56 
57 /* A.7. Video Class-Specific Endpoint Descriptor Subtypes */
58 #define UVC_EP_UNDEFINED 0x00
59 #define UVC_EP_GENERAL 0x01
60 #define UVC_EP_ENDPOINT 0x02
61 #define UVC_EP_INTERRUPT 0x03
62 
63 /* A.8. Video Class-Specific Request Codes */
64 #define UVC_RC_UNDEFINED 0x00
65 #define UVC_SET_CUR 0x01
66 #define UVC_GET_CUR 0x81
67 #define UVC_GET_MIN 0x82
68 #define UVC_GET_MAX 0x83
69 #define UVC_GET_RES 0x84
70 #define UVC_GET_LEN 0x85
71 #define UVC_GET_INFO 0x86
72 #define UVC_GET_DEF 0x87
73 
74 /* A.9.1. VideoControl Interface Control Selectors */
75 #define UVC_VC_CONTROL_UNDEFINED 0x00
76 #define UVC_VC_VIDEO_POWER_MODE_CONTROL 0x01
77 #define UVC_VC_REQUEST_ERROR_CODE_CONTROL 0x02
78 
79 /* A.9.2. Terminal Control Selectors */
80 #define UVC_TE_CONTROL_UNDEFINED 0x00
81 
82 /* A.9.3. Selector Unit Control Selectors */
83 #define UVC_SU_CONTROL_UNDEFINED 0x00
84 #define UVC_SU_INPUT_SELECT_CONTROL 0x01
85 
86 /* A.9.4. Camera Terminal Control Selectors */
87 #define UVC_CT_CONTROL_UNDEFINED 0x00
88 #define UVC_CT_SCANNING_MODE_CONTROL 0x01
89 #define UVC_CT_AE_MODE_CONTROL 0x02
90 #define UVC_CT_AE_PRIORITY_CONTROL 0x03
91 #define UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL 0x04
92 #define UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL 0x05
93 #define UVC_CT_FOCUS_ABSOLUTE_CONTROL 0x06
94 #define UVC_CT_FOCUS_RELATIVE_CONTROL 0x07
95 #define UVC_CT_FOCUS_AUTO_CONTROL 0x08
96 #define UVC_CT_IRIS_ABSOLUTE_CONTROL 0x09
97 #define UVC_CT_IRIS_RELATIVE_CONTROL 0x0a
98 #define UVC_CT_ZOOM_ABSOLUTE_CONTROL 0x0b
99 #define UVC_CT_ZOOM_RELATIVE_CONTROL 0x0c
100 #define UVC_CT_PANTILT_ABSOLUTE_CONTROL 0x0d
101 #define UVC_CT_PANTILT_RELATIVE_CONTROL 0x0e
102 #define UVC_CT_ROLL_ABSOLUTE_CONTROL 0x0f
103 #define UVC_CT_ROLL_RELATIVE_CONTROL 0x10
104 #define UVC_CT_PRIVACY_CONTROL 0x11
105 
106 /* A.9.5. Processing Unit Control Selectors */
107 #define UVC_PU_CONTROL_UNDEFINED 0x00
108 #define UVC_PU_BACKLIGHT_COMPENSATION_CONTROL 0x01
109 #define UVC_PU_BRIGHTNESS_CONTROL 0x02
110 #define UVC_PU_CONTRAST_CONTROL 0x03
111 #define UVC_PU_GAIN_CONTROL 0x04
112 #define UVC_PU_POWER_LINE_FREQUENCY_CONTROL 0x05
113 #define UVC_PU_HUE_CONTROL 0x06
114 #define UVC_PU_SATURATION_CONTROL 0x07
115 #define UVC_PU_SHARPNESS_CONTROL 0x08
116 #define UVC_PU_GAMMA_CONTROL 0x09
117 #define UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL 0x0a
118 #define UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL 0x0b
119 #define UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL 0x0c
120 #define UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL 0x0d
121 #define UVC_PU_DIGITAL_MULTIPLIER_CONTROL 0x0e
122 #define UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL 0x0f
123 #define UVC_PU_HUE_AUTO_CONTROL 0x10
124 #define UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL 0x11
125 #define UVC_PU_ANALOG_LOCK_STATUS_CONTROL 0x12
126 
127 /* A.9.7. VideoStreaming Interface Control Selectors */
128 #define UVC_VS_CONTROL_UNDEFINED 0x00
129 #define UVC_VS_PROBE_CONTROL 0x01
130 #define UVC_VS_COMMIT_CONTROL 0x02
131 #define UVC_VS_STILL_PROBE_CONTROL 0x03
132 #define UVC_VS_STILL_COMMIT_CONTROL 0x04
133 #define UVC_VS_STILL_IMAGE_TRIGGER_CONTROL 0x05
134 #define UVC_VS_STREAM_ERROR_CODE_CONTROL 0x06
135 #define UVC_VS_GENERATE_KEY_FRAME_CONTROL 0x07
136 #define UVC_VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08
137 #define UVC_VS_SYNC_DELAY_CONTROL 0x09
138 
139 /* B.1. USB Terminal Types */
140 #define UVC_TT_VENDOR_SPECIFIC 0x0100
141 #define UVC_TT_STREAMING 0x0101
142 
143 /* B.2. Input Terminal Types */
144 #define UVC_ITT_VENDOR_SPECIFIC 0x0200
145 #define UVC_ITT_CAMERA 0x0201
146 #define UVC_ITT_MEDIA_TRANSPORT_INPUT 0x0202
147 
148 /* B.3. Output Terminal Types */
149 #define UVC_OTT_VENDOR_SPECIFIC 0x0300
150 #define UVC_OTT_DISPLAY 0x0301
151 #define UVC_OTT_MEDIA_TRANSPORT_OUTPUT 0x0302
152 
153 /* B.4. External Terminal Types */
154 #define UVC_EXTERNAL_VENDOR_SPECIFIC 0x0400
155 #define UVC_COMPOSITE_CONNECTOR 0x0401
156 #define UVC_SVIDEO_CONNECTOR 0x0402
157 #define UVC_COMPONENT_CONNECTOR 0x0403
158 
159 /* 2.4.2.2. Status Packet Type */
160 #define UVC_STATUS_TYPE_CONTROL 1
161 #define UVC_STATUS_TYPE_STREAMING 2
162 
163 /* 2.4.3.3. Payload Header Information */
164 #define UVC_STREAM_EOH (1 << 7)
165 #define UVC_STREAM_ERR (1 << 6)
166 #define UVC_STREAM_STI (1 << 5)
167 #define UVC_STREAM_RES (1 << 4)
168 #define UVC_STREAM_SCR (1 << 3)
169 #define UVC_STREAM_PTS (1 << 2)
170 #define UVC_STREAM_EOF (1 << 1)
171 #define UVC_STREAM_FID (1 << 0)
172 
173 /* 4.1.2. Control Capabilities */
174 #define UVC_CONTROL_CAP_GET (1 << 0)
175 #define UVC_CONTROL_CAP_SET (1 << 1)
176 #define UVC_CONTROL_CAP_DISABLED (1 << 2)
177 #define UVC_CONTROL_CAP_AUTOUPDATE (1 << 3)
178 #define UVC_CONTROL_CAP_ASYNCHRONOUS (1 << 4)
179 
180 /* ------------------------------------------------------------------------
181  * UVC structures
182  */
183 
184 /* All UVC descriptors have these 3 fields at the beginning */
185 struct uvc_descriptor_header {
186  __u8 bLength;
187  __u8 bDescriptorType;
188  __u8 bDescriptorSubType;
189 } __attribute__((packed));
190 
191 /* 3.7.2. Video Control Interface Header Descriptor */
192 struct uvc_header_descriptor {
193  __u8 bLength;
194  __u8 bDescriptorType;
195  __u8 bDescriptorSubType;
196  __u16 bcdUVC;
197  __u16 wTotalLength;
198  __u32 dwClockFrequency;
199  __u8 bInCollection;
200  __u8 baInterfaceNr[];
201 } __attribute__((__packed__));
202 
203 #define UVC_DT_HEADER_SIZE(n) (12+(n))
204 
205 #define UVC_HEADER_DESCRIPTOR(n) \
206  uvc_header_descriptor_##n
207 
208 #define DECLARE_UVC_HEADER_DESCRIPTOR(n) \
209 struct UVC_HEADER_DESCRIPTOR(n) { \
210  __u8 bLength; \
211  __u8 bDescriptorType; \
212  __u8 bDescriptorSubType; \
213  __u16 bcdUVC; \
214  __u16 wTotalLength; \
215  __u32 dwClockFrequency; \
216  __u8 bInCollection; \
217  __u8 baInterfaceNr[n]; \
218 } __attribute__ ((packed))
219 
220 /* 3.7.2.1. Input Terminal Descriptor */
221 struct uvc_input_terminal_descriptor {
222  __u8 bLength;
223  __u8 bDescriptorType;
224  __u8 bDescriptorSubType;
225  __u8 bTerminalID;
226  __u16 wTerminalType;
227  __u8 bAssocTerminal;
228  __u8 iTerminal;
229 } __attribute__((__packed__));
230 
231 #define UVC_DT_INPUT_TERMINAL_SIZE 8
232 
233 /* 3.7.2.2. Output Terminal Descriptor */
234 struct uvc_output_terminal_descriptor {
235  __u8 bLength;
236  __u8 bDescriptorType;
237  __u8 bDescriptorSubType;
238  __u8 bTerminalID;
239  __u16 wTerminalType;
240  __u8 bAssocTerminal;
241  __u8 bSourceID;
242  __u8 iTerminal;
243 } __attribute__((__packed__));
244 
245 #define UVC_DT_OUTPUT_TERMINAL_SIZE 9
246 
247 /* 3.7.2.3. Camera Terminal Descriptor */
248 struct uvc_camera_terminal_descriptor {
249  __u8 bLength;
250  __u8 bDescriptorType;
251  __u8 bDescriptorSubType;
252  __u8 bTerminalID;
253  __u16 wTerminalType;
254  __u8 bAssocTerminal;
255  __u8 iTerminal;
256  __u16 wObjectiveFocalLengthMin;
257  __u16 wObjectiveFocalLengthMax;
258  __u16 wOcularFocalLength;
259  __u8 bControlSize;
260  __u8 bmControls[3];
261 } __attribute__((__packed__));
262 
263 #define UVC_DT_CAMERA_TERMINAL_SIZE(n) (15+(n))
264 
265 /* 3.7.2.4. Selector Unit Descriptor */
266 struct uvc_selector_unit_descriptor {
267  __u8 bLength;
268  __u8 bDescriptorType;
269  __u8 bDescriptorSubType;
270  __u8 bUnitID;
271  __u8 bNrInPins;
272  __u8 baSourceID[0];
273  __u8 iSelector;
274 } __attribute__((__packed__));
275 
276 #define UVC_DT_SELECTOR_UNIT_SIZE(n) (6+(n))
277 
278 #define UVC_SELECTOR_UNIT_DESCRIPTOR(n) \
279  uvc_selector_unit_descriptor_##n
280 
281 #define DECLARE_UVC_SELECTOR_UNIT_DESCRIPTOR(n) \
282 struct UVC_SELECTOR_UNIT_DESCRIPTOR(n) { \
283  __u8 bLength; \
284  __u8 bDescriptorType; \
285  __u8 bDescriptorSubType; \
286  __u8 bUnitID; \
287  __u8 bNrInPins; \
288  __u8 baSourceID[n]; \
289  __u8 iSelector; \
290 } __attribute__ ((packed))
291 
292 /* 3.7.2.5. Processing Unit Descriptor */
293 struct uvc_processing_unit_descriptor {
294  __u8 bLength;
295  __u8 bDescriptorType;
296  __u8 bDescriptorSubType;
297  __u8 bUnitID;
298  __u8 bSourceID;
299  __u16 wMaxMultiplier;
300  __u8 bControlSize;
301  __u8 bmControls[2];
302  __u8 iProcessing;
303 } __attribute__((__packed__));
304 
305 #define UVC_DT_PROCESSING_UNIT_SIZE(n) (9+(n))
306 
307 /* 3.7.2.6. Extension Unit Descriptor */
308 struct uvc_extension_unit_descriptor {
309  __u8 bLength;
310  __u8 bDescriptorType;
311  __u8 bDescriptorSubType;
312  __u8 bUnitID;
313  __u8 guidExtensionCode[16];
314  __u8 bNumControls;
315  __u8 bNrInPins;
316  __u8 baSourceID[0];
317  __u8 bControlSize;
318  __u8 bmControls[0];
319  __u8 iExtension;
320 } __attribute__((__packed__));
321 
322 #define UVC_DT_EXTENSION_UNIT_SIZE(p, n) (24+(p)+(n))
323 
324 #define UVC_EXTENSION_UNIT_DESCRIPTOR(p, n) \
325  uvc_extension_unit_descriptor_##p_##n
326 
327 #define DECLARE_UVC_EXTENSION_UNIT_DESCRIPTOR(p, n) \
328 struct UVC_EXTENSION_UNIT_DESCRIPTOR(p, n) { \
329  __u8 bLength; \
330  __u8 bDescriptorType; \
331  __u8 bDescriptorSubType; \
332  __u8 bUnitID; \
333  __u8 guidExtensionCode[16]; \
334  __u8 bNumControls; \
335  __u8 bNrInPins; \
336  __u8 baSourceID[p]; \
337  __u8 bControlSize; \
338  __u8 bmControls[n]; \
339  __u8 iExtension; \
340 } __attribute__ ((packed))
341 
342 /* 3.8.2.2. Video Control Interrupt Endpoint Descriptor */
343 struct uvc_control_endpoint_descriptor {
344  __u8 bLength;
345  __u8 bDescriptorType;
346  __u8 bDescriptorSubType;
347  __u16 wMaxTransferSize;
348 } __attribute__((__packed__));
349 
350 #define UVC_DT_CONTROL_ENDPOINT_SIZE 5
351 
352 /* 3.9.2.1. Input Header Descriptor */
353 struct uvc_input_header_descriptor {
354  __u8 bLength;
355  __u8 bDescriptorType;
356  __u8 bDescriptorSubType;
357  __u8 bNumFormats;
358  __u16 wTotalLength;
359  __u8 bEndpointAddress;
360  __u8 bmInfo;
361  __u8 bTerminalLink;
362  __u8 bStillCaptureMethod;
363  __u8 bTriggerSupport;
364  __u8 bTriggerUsage;
365  __u8 bControlSize;
366  __u8 bmaControls[];
367 } __attribute__((__packed__));
368 
369 #define UVC_DT_INPUT_HEADER_SIZE(n, p) (13+(n*p))
370 
371 #define UVC_INPUT_HEADER_DESCRIPTOR(n, p) \
372  uvc_input_header_descriptor_##n_##p
373 
374 #define DECLARE_UVC_INPUT_HEADER_DESCRIPTOR(n, p) \
375 struct UVC_INPUT_HEADER_DESCRIPTOR(n, p) { \
376  __u8 bLength; \
377  __u8 bDescriptorType; \
378  __u8 bDescriptorSubType; \
379  __u8 bNumFormats; \
380  __u16 wTotalLength; \
381  __u8 bEndpointAddress; \
382  __u8 bmInfo; \
383  __u8 bTerminalLink; \
384  __u8 bStillCaptureMethod; \
385  __u8 bTriggerSupport; \
386  __u8 bTriggerUsage; \
387  __u8 bControlSize; \
388  __u8 bmaControls[p][n]; \
389 } __attribute__ ((packed))
390 
391 /* 3.9.2.2. Output Header Descriptor */
392 struct uvc_output_header_descriptor {
393  __u8 bLength;
394  __u8 bDescriptorType;
395  __u8 bDescriptorSubType;
396  __u8 bNumFormats;
397  __u16 wTotalLength;
398  __u8 bEndpointAddress;
399  __u8 bTerminalLink;
400  __u8 bControlSize;
401  __u8 bmaControls[];
402 } __attribute__((__packed__));
403 
404 #define UVC_DT_OUTPUT_HEADER_SIZE(n, p) (9+(n*p))
405 
406 #define UVC_OUTPUT_HEADER_DESCRIPTOR(n, p) \
407  uvc_output_header_descriptor_##n_##p
408 
409 #define DECLARE_UVC_OUTPUT_HEADER_DESCRIPTOR(n, p) \
410 struct UVC_OUTPUT_HEADER_DESCRIPTOR(n, p) { \
411  __u8 bLength; \
412  __u8 bDescriptorType; \
413  __u8 bDescriptorSubType; \
414  __u8 bNumFormats; \
415  __u16 wTotalLength; \
416  __u8 bEndpointAddress; \
417  __u8 bTerminalLink; \
418  __u8 bControlSize; \
419  __u8 bmaControls[p][n]; \
420 } __attribute__ ((packed))
421 
422 /* 3.9.2.6. Color matching descriptor */
423 struct uvc_color_matching_descriptor {
424  __u8 bLength;
425  __u8 bDescriptorType;
426  __u8 bDescriptorSubType;
427  __u8 bColorPrimaries;
428  __u8 bTransferCharacteristics;
429  __u8 bMatrixCoefficients;
430 } __attribute__((__packed__));
431 
432 #define UVC_DT_COLOR_MATCHING_SIZE 6
433 
434 /* 4.3.1.1. Video Probe and Commit Controls */
435 struct uvc_streaming_control {
436  __u16 bmHint;
437  __u8 bFormatIndex;
438  __u8 bFrameIndex;
439  __u32 dwFrameInterval;
440  __u16 wKeyFrameRate;
441  __u16 wPFrameRate;
442  __u16 wCompQuality;
443  __u16 wCompWindowSize;
444  __u16 wDelay;
445  __u32 dwMaxVideoFrameSize;
446  __u32 dwMaxPayloadTransferSize;
447  __u32 dwClockFrequency;
448  __u8 bmFramingInfo;
449  __u8 bPreferedVersion;
450  __u8 bMinVersion;
451  __u8 bMaxVersion;
452 } __attribute__((__packed__));
453 
454 /* Uncompressed Payload - 3.1.1. Uncompressed Video Format Descriptor */
455 struct uvc_format_uncompressed {
456  __u8 bLength;
457  __u8 bDescriptorType;
458  __u8 bDescriptorSubType;
459  __u8 bFormatIndex;
460  __u8 bNumFrameDescriptors;
461  __u8 guidFormat[16];
462  __u8 bBitsPerPixel;
463  __u8 bDefaultFrameIndex;
464  __u8 bAspectRatioX;
465  __u8 bAspectRatioY;
466  __u8 bmInterfaceFlags;
467  __u8 bCopyProtect;
468 } __attribute__((__packed__));
469 
470 #define UVC_DT_FORMAT_UNCOMPRESSED_SIZE 27
471 
472 /* Uncompressed Payload - 3.1.2. Uncompressed Video Frame Descriptor */
473 struct uvc_frame_uncompressed {
474  __u8 bLength;
475  __u8 bDescriptorType;
476  __u8 bDescriptorSubType;
477  __u8 bFrameIndex;
478  __u8 bmCapabilities;
479  __u16 wWidth;
480  __u16 wHeight;
481  __u32 dwMinBitRate;
482  __u32 dwMaxBitRate;
483  __u32 dwMaxVideoFrameBufferSize;
484  __u32 dwDefaultFrameInterval;
485  __u8 bFrameIntervalType;
486  __u32 dwFrameInterval[];
487 } __attribute__((__packed__));
488 
489 #define UVC_DT_FRAME_UNCOMPRESSED_SIZE(n) (26+4*(n))
490 
491 #define UVC_FRAME_UNCOMPRESSED(n) \
492  uvc_frame_uncompressed_##n
493 
494 #define DECLARE_UVC_FRAME_UNCOMPRESSED(n) \
495 struct UVC_FRAME_UNCOMPRESSED(n) { \
496  __u8 bLength; \
497  __u8 bDescriptorType; \
498  __u8 bDescriptorSubType; \
499  __u8 bFrameIndex; \
500  __u8 bmCapabilities; \
501  __u16 wWidth; \
502  __u16 wHeight; \
503  __u32 dwMinBitRate; \
504  __u32 dwMaxBitRate; \
505  __u32 dwMaxVideoFrameBufferSize; \
506  __u32 dwDefaultFrameInterval; \
507  __u8 bFrameIntervalType; \
508  __u32 dwFrameInterval[n]; \
509 } __attribute__ ((packed))
510 
511 /* MJPEG Payload - 3.1.1. MJPEG Video Format Descriptor */
512 struct uvc_format_mjpeg {
513  __u8 bLength;
514  __u8 bDescriptorType;
515  __u8 bDescriptorSubType;
516  __u8 bFormatIndex;
517  __u8 bNumFrameDescriptors;
518  __u8 bmFlags;
519  __u8 bDefaultFrameIndex;
520  __u8 bAspectRatioX;
521  __u8 bAspectRatioY;
522  __u8 bmInterfaceFlags;
523  __u8 bCopyProtect;
524 } __attribute__((__packed__));
525 
526 #define UVC_DT_FORMAT_MJPEG_SIZE 11
527 
528 /* MJPEG Payload - 3.1.2. MJPEG Video Frame Descriptor */
529 struct uvc_frame_mjpeg {
530  __u8 bLength;
531  __u8 bDescriptorType;
532  __u8 bDescriptorSubType;
533  __u8 bFrameIndex;
534  __u8 bmCapabilities;
535  __u16 wWidth;
536  __u16 wHeight;
537  __u32 dwMinBitRate;
538  __u32 dwMaxBitRate;
539  __u32 dwMaxVideoFrameBufferSize;
540  __u32 dwDefaultFrameInterval;
541  __u8 bFrameIntervalType;
542  __u32 dwFrameInterval[];
543 } __attribute__((__packed__));
544 
545 #define UVC_DT_FRAME_MJPEG_SIZE(n) (26+4*(n))
546 
547 #define UVC_FRAME_MJPEG(n) \
548  uvc_frame_mjpeg_##n
549 
550 #define DECLARE_UVC_FRAME_MJPEG(n) \
551 struct UVC_FRAME_MJPEG(n) { \
552  __u8 bLength; \
553  __u8 bDescriptorType; \
554  __u8 bDescriptorSubType; \
555  __u8 bFrameIndex; \
556  __u8 bmCapabilities; \
557  __u16 wWidth; \
558  __u16 wHeight; \
559  __u32 dwMinBitRate; \
560  __u32 dwMaxBitRate; \
561  __u32 dwMaxVideoFrameBufferSize; \
562  __u32 dwDefaultFrameInterval; \
563  __u8 bFrameIntervalType; \
564  __u32 dwFrameInterval[n]; \
565 } __attribute__ ((packed))
566 
567 #endif /* __LINUX_USB_VIDEO_H */
568 
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