1#ifndef _USB_VIDEO_H_
2#define _USB_VIDEO_H_
3
4#ifndef __KERNEL__
5#error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
6#endif
7
8#include <linux/kernel.h>
9#include <linux/poll.h>
10#include <linux/usb.h>
11#include <linux/usb/video.h>
12#include <linux/uvcvideo.h>
13#include <linux/videodev2.h>
14#include <media/media-device.h>
15#include <media/v4l2-device.h>
16#include <media/v4l2-event.h>
17#include <media/v4l2-fh.h>
18#include <media/videobuf2-core.h>
19
20
21
22
23
24#define UVC_TERM_INPUT 0x0000
25#define UVC_TERM_OUTPUT 0x8000
26#define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000)
27
28#define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff)
29#define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0)
30#define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0)
31#define UVC_ENTITY_IS_ITERM(entity) \
32 (UVC_ENTITY_IS_TERM(entity) && \
33 ((entity)->type & 0x8000) == UVC_TERM_INPUT)
34#define UVC_ENTITY_IS_OTERM(entity) \
35 (UVC_ENTITY_IS_TERM(entity) && \
36 ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
37
38
39
40
41
42#define UVC_GUID_UVC_CAMERA \
43 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
44 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
45#define UVC_GUID_UVC_OUTPUT \
46 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
47 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
48#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
49 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
50 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
51#define UVC_GUID_UVC_PROCESSING \
52 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
54#define UVC_GUID_UVC_SELECTOR \
55 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
57
58#define UVC_GUID_FORMAT_MJPEG \
59 { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \
60 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
61#define UVC_GUID_FORMAT_YUY2 \
62 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
63 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
64#define UVC_GUID_FORMAT_YUY2_ISIGHT \
65 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
66 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
67#define UVC_GUID_FORMAT_NV12 \
68 { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
69 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
70#define UVC_GUID_FORMAT_YV12 \
71 { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
72 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
73#define UVC_GUID_FORMAT_I420 \
74 { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
75 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
76#define UVC_GUID_FORMAT_UYVY \
77 { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \
78 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
79#define UVC_GUID_FORMAT_Y800 \
80 { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \
81 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
82#define UVC_GUID_FORMAT_Y8 \
83 { 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \
84 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
85#define UVC_GUID_FORMAT_Y10 \
86 { 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \
87 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
88#define UVC_GUID_FORMAT_Y12 \
89 { 'Y', '1', '2', ' ', 0x00, 0x00, 0x10, 0x00, \
90 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
91#define UVC_GUID_FORMAT_Y16 \
92 { 'Y', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \
93 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
94#define UVC_GUID_FORMAT_BY8 \
95 { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \
96 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
97#define UVC_GUID_FORMAT_RGBP \
98 { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \
99 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
100#define UVC_GUID_FORMAT_M420 \
101 { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
102 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
103
104#define UVC_GUID_FORMAT_H264 \
105 { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \
106 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
107
108
109
110
111
112#define DRIVER_VERSION "1.1.1"
113
114
115#define UVC_URBS 5
116
117#define UVC_MAX_PACKETS 32
118
119#define UVC_MAX_VIDEO_BUFFERS 32
120
121#define UVC_MAX_STATUS_SIZE 16
122
123#define UVC_CTRL_CONTROL_TIMEOUT 300
124#define UVC_CTRL_STREAMING_TIMEOUT 5000
125
126
127#define UVC_MAX_CONTROL_MAPPINGS 1024
128#define UVC_MAX_CONTROL_MENU_ENTRIES 32
129
130
131#define UVC_QUIRK_STATUS_INTERVAL 0x00000001
132#define UVC_QUIRK_PROBE_MINMAX 0x00000002
133#define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
134#define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
135#define UVC_QUIRK_STREAM_NO_FID 0x00000010
136#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
137#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
138#define UVC_QUIRK_PROBE_DEF 0x00000100
139#define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
140
141
142#define UVC_FMT_FLAG_COMPRESSED 0x00000001
143#define UVC_FMT_FLAG_STREAM 0x00000002
144
145
146
147
148
149struct uvc_device;
150
151
152
153
154struct uvc_control_info {
155 struct list_head mappings;
156
157 __u8 entity[16];
158 __u8 index;
159 __u8 selector;
160
161 __u16 size;
162 __u32 flags;
163};
164
165struct uvc_control_mapping {
166 struct list_head list;
167 struct list_head ev_subs;
168
169 __u32 id;
170 __u8 name[32];
171 __u8 entity[16];
172 __u8 selector;
173
174 __u8 size;
175 __u8 offset;
176 enum v4l2_ctrl_type v4l2_type;
177 __u32 data_type;
178
179 struct uvc_menu_info *menu_info;
180 __u32 menu_count;
181
182 __u32 master_id;
183 __s32 master_manual;
184 __u32 slave_ids[2];
185
186 __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
187 const __u8 *data);
188 void (*set) (struct uvc_control_mapping *mapping, __s32 value,
189 __u8 *data);
190};
191
192struct uvc_control {
193 struct uvc_entity *entity;
194 struct uvc_control_info info;
195
196 __u8 index;
197
198 __u8 dirty:1,
199 loaded:1,
200 modified:1,
201 cached:1,
202 initialized:1;
203
204 __u8 *uvc_data;
205};
206
207struct uvc_format_desc {
208 char *name;
209 __u8 guid[16];
210 __u32 fcc;
211};
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228#define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
229
230struct uvc_entity {
231 struct list_head list;
232 struct list_head chain;
233
234 unsigned int flags;
235
236 __u8 id;
237 __u16 type;
238 char name[64];
239
240
241 struct video_device *vdev;
242 struct v4l2_subdev subdev;
243 unsigned int num_pads;
244 unsigned int num_links;
245 struct media_pad *pads;
246
247 union {
248 struct {
249 __u16 wObjectiveFocalLengthMin;
250 __u16 wObjectiveFocalLengthMax;
251 __u16 wOcularFocalLength;
252 __u8 bControlSize;
253 __u8 *bmControls;
254 } camera;
255
256 struct {
257 __u8 bControlSize;
258 __u8 *bmControls;
259 __u8 bTransportModeSize;
260 __u8 *bmTransportModes;
261 } media;
262
263 struct {
264 } output;
265
266 struct {
267 __u16 wMaxMultiplier;
268 __u8 bControlSize;
269 __u8 *bmControls;
270 __u8 bmVideoStandards;
271 } processing;
272
273 struct {
274 } selector;
275
276 struct {
277 __u8 guidExtensionCode[16];
278 __u8 bNumControls;
279 __u8 bControlSize;
280 __u8 *bmControls;
281 __u8 *bmControlsType;
282 } extension;
283 };
284
285 __u8 bNrInPins;
286 __u8 *baSourceID;
287
288 unsigned int ncontrols;
289 struct uvc_control *controls;
290};
291
292struct uvc_frame {
293 __u8 bFrameIndex;
294 __u8 bmCapabilities;
295 __u16 wWidth;
296 __u16 wHeight;
297 __u32 dwMinBitRate;
298 __u32 dwMaxBitRate;
299 __u32 dwMaxVideoFrameBufferSize;
300 __u8 bFrameIntervalType;
301 __u32 dwDefaultFrameInterval;
302 __u32 *dwFrameInterval;
303};
304
305struct uvc_format {
306 __u8 type;
307 __u8 index;
308 __u8 bpp;
309 __u8 colorspace;
310 __u32 fcc;
311 __u32 flags;
312
313 char name[32];
314
315 unsigned int nframes;
316 struct uvc_frame *frame;
317};
318
319struct uvc_streaming_header {
320 __u8 bNumFormats;
321 __u8 bEndpointAddress;
322 __u8 bTerminalLink;
323 __u8 bControlSize;
324 __u8 *bmaControls;
325
326 __u8 bmInfo;
327 __u8 bStillCaptureMethod;
328 __u8 bTriggerSupport;
329 __u8 bTriggerUsage;
330};
331
332enum uvc_buffer_state {
333 UVC_BUF_STATE_IDLE = 0,
334 UVC_BUF_STATE_QUEUED = 1,
335 UVC_BUF_STATE_ACTIVE = 2,
336 UVC_BUF_STATE_READY = 3,
337 UVC_BUF_STATE_DONE = 4,
338 UVC_BUF_STATE_ERROR = 5,
339};
340
341struct uvc_buffer {
342 struct vb2_buffer buf;
343 struct list_head queue;
344
345 enum uvc_buffer_state state;
346 unsigned int error;
347
348 void *mem;
349 unsigned int length;
350 unsigned int bytesused;
351
352 u32 pts;
353};
354
355#define UVC_QUEUE_DISCONNECTED (1 << 0)
356#define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
357
358struct uvc_video_queue {
359 struct vb2_queue queue;
360 struct mutex mutex;
361
362 unsigned int flags;
363 unsigned int buf_used;
364
365 spinlock_t irqlock;
366 struct list_head irqqueue;
367};
368
369struct uvc_video_chain {
370 struct uvc_device *dev;
371 struct list_head list;
372
373 struct list_head entities;
374 struct uvc_entity *processing;
375 struct uvc_entity *selector;
376
377 struct mutex ctrl_mutex;
378
379 struct v4l2_prio_state prio;
380 u32 caps;
381};
382
383struct uvc_stats_frame {
384 unsigned int size;
385 unsigned int first_data;
386
387 unsigned int nb_packets;
388 unsigned int nb_empty;
389 unsigned int nb_invalid;
390 unsigned int nb_errors;
391
392 unsigned int nb_pts;
393 unsigned int nb_pts_diffs;
394 unsigned int last_pts_diff;
395 bool has_initial_pts;
396 bool has_early_pts;
397 u32 pts;
398
399 unsigned int nb_scr;
400 unsigned int nb_scr_diffs;
401 u16 scr_sof;
402 u32 scr_stc;
403};
404
405struct uvc_stats_stream {
406 struct timespec start_ts;
407 struct timespec stop_ts;
408
409 unsigned int nb_frames;
410
411 unsigned int nb_packets;
412 unsigned int nb_empty;
413 unsigned int nb_invalid;
414 unsigned int nb_errors;
415
416 unsigned int nb_pts_constant;
417 unsigned int nb_pts_early;
418 unsigned int nb_pts_initial;
419
420 unsigned int nb_scr_count_ok;
421 unsigned int nb_scr_diffs_ok;
422 unsigned int scr_sof_count;
423 unsigned int scr_sof;
424 unsigned int min_sof;
425 unsigned int max_sof;
426};
427
428struct uvc_streaming {
429 struct list_head list;
430 struct uvc_device *dev;
431 struct video_device *vdev;
432 struct uvc_video_chain *chain;
433 atomic_t active;
434
435 struct usb_interface *intf;
436 int intfnum;
437 __u16 maxpsize;
438
439 struct uvc_streaming_header header;
440 enum v4l2_buf_type type;
441
442 unsigned int nformats;
443 struct uvc_format *format;
444
445 struct uvc_streaming_control ctrl;
446 struct uvc_format *def_format;
447 struct uvc_format *cur_format;
448 struct uvc_frame *cur_frame;
449
450
451
452 struct mutex mutex;
453
454
455 unsigned int frozen : 1;
456 struct uvc_video_queue queue;
457 void (*decode) (struct urb *urb, struct uvc_streaming *video,
458 struct uvc_buffer *buf);
459
460
461 struct {
462 __u8 header[256];
463 unsigned int header_size;
464 int skip_payload;
465 __u32 payload_size;
466 __u32 max_payload_size;
467 } bulk;
468
469 struct urb *urb[UVC_URBS];
470 char *urb_buffer[UVC_URBS];
471 dma_addr_t urb_dma[UVC_URBS];
472 unsigned int urb_size;
473
474 __u32 sequence;
475 __u8 last_fid;
476
477
478 struct dentry *debugfs_dir;
479 struct {
480 struct uvc_stats_frame frame;
481 struct uvc_stats_stream stream;
482 } stats;
483
484
485 struct uvc_clock {
486 struct uvc_clock_sample {
487 u32 dev_stc;
488 u16 dev_sof;
489 struct timespec host_ts;
490 u16 host_sof;
491 } *samples;
492
493 unsigned int head;
494 unsigned int count;
495 unsigned int size;
496
497 u16 last_sof;
498 u16 sof_offset;
499
500 spinlock_t lock;
501 } clock;
502};
503
504enum uvc_device_state {
505 UVC_DEV_DISCONNECTED = 1,
506};
507
508struct uvc_device {
509 struct usb_device *udev;
510 struct usb_interface *intf;
511 unsigned long warnings;
512 __u32 quirks;
513 int intfnum;
514 char name[32];
515
516 enum uvc_device_state state;
517 struct mutex lock;
518 unsigned int users;
519 atomic_t nmappings;
520
521
522#ifdef CONFIG_MEDIA_CONTROLLER
523 struct media_device mdev;
524#endif
525 struct v4l2_device vdev;
526 __u16 uvc_version;
527 __u32 clock_frequency;
528
529 struct list_head entities;
530 struct list_head chains;
531
532
533 struct list_head streams;
534 atomic_t nstreams;
535
536
537 struct usb_host_endpoint *int_ep;
538 struct urb *int_urb;
539 __u8 *status;
540 struct input_dev *input;
541 char input_phys[64];
542};
543
544enum uvc_handle_state {
545 UVC_HANDLE_PASSIVE = 0,
546 UVC_HANDLE_ACTIVE = 1,
547};
548
549struct uvc_fh {
550 struct v4l2_fh vfh;
551 struct uvc_video_chain *chain;
552 struct uvc_streaming *stream;
553 enum uvc_handle_state state;
554};
555
556struct uvc_driver {
557 struct usb_driver driver;
558};
559
560
561
562
563
564#define UVC_TRACE_PROBE (1 << 0)
565#define UVC_TRACE_DESCR (1 << 1)
566#define UVC_TRACE_CONTROL (1 << 2)
567#define UVC_TRACE_FORMAT (1 << 3)
568#define UVC_TRACE_CAPTURE (1 << 4)
569#define UVC_TRACE_CALLS (1 << 5)
570#define UVC_TRACE_IOCTL (1 << 6)
571#define UVC_TRACE_FRAME (1 << 7)
572#define UVC_TRACE_SUSPEND (1 << 8)
573#define UVC_TRACE_STATUS (1 << 9)
574#define UVC_TRACE_VIDEO (1 << 10)
575#define UVC_TRACE_STATS (1 << 11)
576#define UVC_TRACE_CLOCK (1 << 12)
577
578#define UVC_WARN_MINMAX 0
579#define UVC_WARN_PROBE_DEF 1
580#define UVC_WARN_XU_GET_RES 2
581
582extern unsigned int uvc_clock_param;
583extern unsigned int uvc_no_drop_param;
584extern unsigned int uvc_trace_param;
585extern unsigned int uvc_timeout_param;
586
587#define uvc_trace(flag, msg...) \
588 do { \
589 if (uvc_trace_param & flag) \
590 printk(KERN_DEBUG "uvcvideo: " msg); \
591 } while (0)
592
593#define uvc_warn_once(dev, warn, msg...) \
594 do { \
595 if (!test_and_set_bit(warn, &dev->warnings)) \
596 printk(KERN_INFO "uvcvideo: " msg); \
597 } while (0)
598
599#define uvc_printk(level, msg...) \
600 printk(level "uvcvideo: " msg)
601
602
603
604
605
606
607extern struct uvc_driver uvc_driver;
608
609extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
610
611
612extern int uvc_queue_init(struct uvc_video_queue *queue,
613 enum v4l2_buf_type type, int drop_corrupted);
614extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
615 struct v4l2_requestbuffers *rb);
616extern void uvc_free_buffers(struct uvc_video_queue *queue);
617extern int uvc_query_buffer(struct uvc_video_queue *queue,
618 struct v4l2_buffer *v4l2_buf);
619extern int uvc_queue_buffer(struct uvc_video_queue *queue,
620 struct v4l2_buffer *v4l2_buf);
621extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
622 struct v4l2_buffer *v4l2_buf, int nonblocking);
623extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
624extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
625extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
626 struct uvc_buffer *buf);
627extern int uvc_queue_mmap(struct uvc_video_queue *queue,
628 struct vm_area_struct *vma);
629extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
630 struct file *file, poll_table *wait);
631#ifndef CONFIG_MMU
632extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
633 unsigned long pgoff);
634#endif
635extern int uvc_queue_allocated(struct uvc_video_queue *queue);
636static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
637{
638 return vb2_is_streaming(&queue->queue);
639}
640
641
642extern const struct v4l2_file_operations uvc_fops;
643
644
645extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
646extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
647
648
649extern int uvc_video_init(struct uvc_streaming *stream);
650extern int uvc_video_suspend(struct uvc_streaming *stream);
651extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
652extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
653extern int uvc_probe_video(struct uvc_streaming *stream,
654 struct uvc_streaming_control *probe);
655extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
656 __u8 intfnum, __u8 cs, void *data, __u16 size);
657void uvc_video_clock_update(struct uvc_streaming *stream,
658 struct v4l2_buffer *v4l2_buf,
659 struct uvc_buffer *buf);
660
661
662extern int uvc_status_init(struct uvc_device *dev);
663extern void uvc_status_cleanup(struct uvc_device *dev);
664extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
665extern void uvc_status_stop(struct uvc_device *dev);
666
667
668extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
669
670extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
671 struct v4l2_queryctrl *v4l2_ctrl);
672extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
673 struct v4l2_querymenu *query_menu);
674
675extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
676 const struct uvc_control_mapping *mapping);
677extern int uvc_ctrl_init_device(struct uvc_device *dev);
678extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
679extern int uvc_ctrl_resume_device(struct uvc_device *dev);
680
681extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
682extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
683 const struct v4l2_ext_control *xctrls,
684 unsigned int xctrls_count);
685static inline int uvc_ctrl_commit(struct uvc_fh *handle,
686 const struct v4l2_ext_control *xctrls,
687 unsigned int xctrls_count)
688{
689 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
690}
691static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
692{
693 return __uvc_ctrl_commit(handle, 1, NULL, 0);
694}
695
696extern int uvc_ctrl_get(struct uvc_video_chain *chain,
697 struct v4l2_ext_control *xctrl);
698extern int uvc_ctrl_set(struct uvc_video_chain *chain,
699 struct v4l2_ext_control *xctrl);
700
701extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
702 struct uvc_xu_control_query *xqry);
703
704
705extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
706 unsigned int n_terms, unsigned int threshold);
707extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
708 uint32_t denominator);
709extern struct usb_host_endpoint *uvc_find_endpoint(
710 struct usb_host_interface *alts, __u8 epaddr);
711
712
713void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
714 struct uvc_buffer *buf);
715
716
717int uvc_debugfs_init(void);
718void uvc_debugfs_cleanup(void);
719int uvc_debugfs_init_stream(struct uvc_streaming *stream);
720void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
721
722size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
723 size_t size);
724
725#endif
726
