#ifndef _USB_VIDEO_H_ #define _USB_VIDEO_H_ #ifndef __KERNEL__ #error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead." #endif /* __KERNEL__ */ #include <linux/kernel.h> #include <linux/poll.h> #include <linux/usb.h> #include <linux/usb/video.h> #include <linux/uvcvideo.h> #include <linux/videodev2.h> #include <media/media-device.h> #include <media/v4l2-device.h> #include <media/v4l2-event.h> #include <media/v4l2-fh.h> #include <media/videobuf2-core.h> /* -------------------------------------------------------------------------- * UVC constants */ #define UVC_TERM_INPUT 0x0000 #define UVC_TERM_OUTPUT 0x8000 #define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000) #define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff) #define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0) #define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0) #define UVC_ENTITY_IS_ITERM(entity) \ (UVC_ENTITY_IS_TERM(entity) && \ ((entity)->type & 0x8000) == UVC_TERM_INPUT) #define UVC_ENTITY_IS_OTERM(entity) \ (UVC_ENTITY_IS_TERM(entity) && \ ((entity)->type & 0x8000) == UVC_TERM_OUTPUT) /* ------------------------------------------------------------------------ * GUIDs */ #define UVC_GUID_UVC_CAMERA \ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} #define UVC_GUID_UVC_OUTPUT \ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02} #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03} #define UVC_GUID_UVC_PROCESSING \ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01} #define UVC_GUID_UVC_SELECTOR \ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02} #define UVC_GUID_FORMAT_MJPEG \ { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_YUY2 \ { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_YUY2_ISIGHT \ { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_NV12 \ { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_YV12 \ { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_I420 \ { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_UYVY \ { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_Y800 \ { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_Y8 \ { 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_Y10 \ { 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_Y12 \ { 'Y', '1', '2', ' ', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_Y16 \ { 'Y', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_BY8 \ { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_BA81 \ { 'B', 'A', '8', '1', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_GBRG \ { 'G', 'B', 'R', 'G', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_GRBG \ { 'G', 'R', 'B', 'G', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_RGGB \ { 'R', 'G', 'G', 'B', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_RGBP \ { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_M420 \ { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} #define UVC_GUID_FORMAT_H264 \ { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} /* ------------------------------------------------------------------------ * Driver specific constants. */ #define DRIVER_VERSION "1.1.1" /* Number of isochronous URBs. */ #define UVC_URBS 5 /* Maximum number of packets per URB. */ #define UVC_MAX_PACKETS 32 /* Maximum status buffer size in bytes of interrupt URB. */ #define UVC_MAX_STATUS_SIZE 16 #define UVC_CTRL_CONTROL_TIMEOUT 300 #define UVC_CTRL_STREAMING_TIMEOUT 5000 /* Maximum allowed number of control mappings per device */ #define UVC_MAX_CONTROL_MAPPINGS 1024 #define UVC_MAX_CONTROL_MENU_ENTRIES 32 /* Devices quirks */ #define UVC_QUIRK_STATUS_INTERVAL 0x00000001 #define UVC_QUIRK_PROBE_MINMAX 0x00000002 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008 #define UVC_QUIRK_STREAM_NO_FID 0x00000010 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080 #define UVC_QUIRK_PROBE_DEF 0x00000100 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 /* Format flags */ #define UVC_FMT_FLAG_COMPRESSED 0x00000001 #define UVC_FMT_FLAG_STREAM 0x00000002 /* ------------------------------------------------------------------------ * Structures. */ struct uvc_device; /* TODO: Put the most frequently accessed fields at the beginning of * structures to maximize cache efficiency. */ struct uvc_control_info { struct list_head mappings; __u8 entity[16]; __u8 index; /* Bit index in bmControls */ __u8 selector; __u16 size; __u32 flags; }; struct uvc_control_mapping { struct list_head list; struct list_head ev_subs; __u32 id; __u8 name[32]; __u8 entity[16]; __u8 selector; __u8 size; __u8 offset; enum v4l2_ctrl_type v4l2_type; __u32 data_type; struct uvc_menu_info *menu_info; __u32 menu_count; __u32 master_id; __s32 master_manual; __u32 slave_ids[2]; __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query, const __u8 *data); void (*set) (struct uvc_control_mapping *mapping, __s32 value, __u8 *data); }; struct uvc_control { struct uvc_entity *entity; struct uvc_control_info info; __u8 index; /* Used to match the uvc_control entry with a uvc_control_info. */ __u8 dirty:1, loaded:1, modified:1, cached:1, initialized:1; __u8 *uvc_data; }; struct uvc_format_desc { char *name; __u8 guid[16]; __u32 fcc; }; /* The term 'entity' refers to both UVC units and UVC terminals. * * The type field is either the terminal type (wTerminalType in the terminal * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor). * As the bDescriptorSubtype field is one byte long, the type value will * always have a null MSB for units. All terminal types defined by the UVC * specification have a non-null MSB, so it is safe to use the MSB to * differentiate between units and terminals as long as the descriptor parsing * code makes sure terminal types have a non-null MSB. * * For terminals, the type's most significant bit stores the terminal * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should * always be accessed with the UVC_ENTITY_* macros and never directly. */ #define UVC_ENTITY_FLAG_DEFAULT (1 << 0) struct uvc_entity { struct list_head list; /* Entity as part of a UVC device. */ struct list_head chain; /* Entity as part of a video device * chain. */ unsigned int flags; __u8 id; __u16 type; char name[64]; /* Media controller-related fields. */ struct video_device *vdev; struct v4l2_subdev subdev; unsigned int num_pads; unsigned int num_links; struct media_pad *pads; union { struct { __u16 wObjectiveFocalLengthMin; __u16 wObjectiveFocalLengthMax; __u16 wOcularFocalLength; __u8 bControlSize; __u8 *bmControls; } camera; struct { __u8 bControlSize; __u8 *bmControls; __u8 bTransportModeSize; __u8 *bmTransportModes; } media; struct { } output; struct { __u16 wMaxMultiplier; __u8 bControlSize; __u8 *bmControls; __u8 bmVideoStandards; } processing; struct { } selector; struct { __u8 guidExtensionCode[16]; __u8 bNumControls; __u8 bControlSize; __u8 *bmControls; __u8 *bmControlsType; } extension; }; __u8 bNrInPins; __u8 *baSourceID; unsigned int ncontrols; struct uvc_control *controls; }; struct uvc_frame { __u8 bFrameIndex; __u8 bmCapabilities; __u16 wWidth; __u16 wHeight; __u32 dwMinBitRate; __u32 dwMaxBitRate; __u32 dwMaxVideoFrameBufferSize; __u8 bFrameIntervalType; __u32 dwDefaultFrameInterval; __u32 *dwFrameInterval; }; struct uvc_format { __u8 type; __u8 index; __u8 bpp; __u8 colorspace; __u32 fcc; __u32 flags; char name[32]; unsigned int nframes; struct uvc_frame *frame; }; struct uvc_streaming_header { __u8 bNumFormats; __u8 bEndpointAddress; __u8 bTerminalLink; __u8 bControlSize; __u8 *bmaControls; /* The following fields are used by input headers only. */ __u8 bmInfo; __u8 bStillCaptureMethod; __u8 bTriggerSupport; __u8 bTriggerUsage; }; enum uvc_buffer_state { UVC_BUF_STATE_IDLE = 0, UVC_BUF_STATE_QUEUED = 1, UVC_BUF_STATE_ACTIVE = 2, UVC_BUF_STATE_READY = 3, UVC_BUF_STATE_DONE = 4, UVC_BUF_STATE_ERROR = 5, }; struct uvc_buffer { struct vb2_buffer buf; struct list_head queue; enum uvc_buffer_state state; unsigned int error; void *mem; unsigned int length; unsigned int bytesused; u32 pts; }; #define UVC_QUEUE_DISCONNECTED (1 << 0) #define UVC_QUEUE_DROP_CORRUPTED (1 << 1) struct uvc_video_queue { struct vb2_queue queue; struct mutex mutex; /* Protects queue */ unsigned int flags; unsigned int buf_used; spinlock_t irqlock; /* Protects irqqueue */ struct list_head irqqueue; }; struct uvc_video_chain { struct uvc_device *dev; struct list_head list; struct list_head entities; /* All entities */ struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ struct mutex ctrl_mutex; /* Protects ctrl.info */ struct v4l2_prio_state prio; /* V4L2 priority state */ u32 caps; /* V4L2 chain-wide caps */ }; struct uvc_stats_frame { unsigned int size; /* Number of bytes captured */ unsigned int first_data; /* Index of the first non-empty packet */ unsigned int nb_packets; /* Number of packets */ unsigned int nb_empty; /* Number of empty packets */ unsigned int nb_invalid; /* Number of packets with an invalid header */ unsigned int nb_errors; /* Number of packets with the error bit set */ unsigned int nb_pts; /* Number of packets with a PTS timestamp */ unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */ unsigned int last_pts_diff; /* Index of the last PTS difference */ bool has_initial_pts; /* Whether the first non-empty packet has a PTS */ bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */ u32 pts; /* PTS of the last packet */ unsigned int nb_scr; /* Number of packets with a SCR timestamp */ unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */ u16 scr_sof; /* SCR.SOF of the last packet */ u32 scr_stc; /* SCR.STC of the last packet */ }; struct uvc_stats_stream { struct timespec start_ts; /* Stream start timestamp */ struct timespec stop_ts; /* Stream stop timestamp */ unsigned int nb_frames; /* Number of frames */ unsigned int nb_packets; /* Number of packets */ unsigned int nb_empty; /* Number of empty packets */ unsigned int nb_invalid; /* Number of packets with an invalid header */ unsigned int nb_errors; /* Number of packets with the error bit set */ unsigned int nb_pts_constant; /* Number of frames with constant PTS */ unsigned int nb_pts_early; /* Number of frames with early PTS */ unsigned int nb_pts_initial; /* Number of frames with initial PTS */ unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */ unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */ unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */ unsigned int scr_sof; /* STC.SOF of the last packet */ unsigned int min_sof; /* Minimum STC.SOF value */ unsigned int max_sof; /* Maximum STC.SOF value */ }; struct uvc_streaming { struct list_head list; struct uvc_device *dev; struct video_device *vdev; struct uvc_video_chain *chain; atomic_t active; struct usb_interface *intf; int intfnum; __u16 maxpsize; struct uvc_streaming_header header; enum v4l2_buf_type type; unsigned int nformats; struct uvc_format *format; struct uvc_streaming_control ctrl; struct uvc_format *def_format; struct uvc_format *cur_format; struct uvc_frame *cur_frame; /* Protect access to ctrl, cur_format, cur_frame and hardware video * probe control. */ struct mutex mutex; /* Buffers queue. */ unsigned int frozen : 1; struct uvc_video_queue queue; void (*decode) (struct urb *urb, struct uvc_streaming *video, struct uvc_buffer *buf); /* Context data used by the bulk completion handler. */ struct { __u8 header[256]; unsigned int header_size; int skip_payload; __u32 payload_size; __u32 max_payload_size; } bulk; struct urb *urb[UVC_URBS]; char *urb_buffer[UVC_URBS]; dma_addr_t urb_dma[UVC_URBS]; unsigned int urb_size; __u32 sequence; __u8 last_fid; /* debugfs */ struct dentry *debugfs_dir; struct { struct uvc_stats_frame frame; struct uvc_stats_stream stream; } stats; /* Timestamps support. */ struct uvc_clock { struct uvc_clock_sample { u32 dev_stc; u16 dev_sof; struct timespec host_ts; u16 host_sof; } *samples; unsigned int head; unsigned int count; unsigned int size; u16 last_sof; u16 sof_offset; spinlock_t lock; } clock; }; enum uvc_device_state { UVC_DEV_DISCONNECTED = 1, }; struct uvc_device { struct usb_device *udev; struct usb_interface *intf; unsigned long warnings; __u32 quirks; int intfnum; char name[32]; enum uvc_device_state state; struct mutex lock; /* Protects users */ unsigned int users; atomic_t nmappings; /* Video control interface */ #ifdef CONFIG_MEDIA_CONTROLLER struct media_device mdev; #endif struct v4l2_device vdev; __u16 uvc_version; __u32 clock_frequency; struct list_head entities; struct list_head chains; /* Video Streaming interfaces */ struct list_head streams; atomic_t nstreams; /* Status Interrupt Endpoint */ struct usb_host_endpoint *int_ep; struct urb *int_urb; __u8 *status; struct input_dev *input; char input_phys[64]; }; enum uvc_handle_state { UVC_HANDLE_PASSIVE = 0, UVC_HANDLE_ACTIVE = 1, }; struct uvc_fh { struct v4l2_fh vfh; struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; }; struct uvc_driver { struct usb_driver driver; }; /* ------------------------------------------------------------------------ * Debugging, printing and logging */ #define UVC_TRACE_PROBE (1 << 0) #define UVC_TRACE_DESCR (1 << 1) #define UVC_TRACE_CONTROL (1 << 2) #define UVC_TRACE_FORMAT (1 << 3) #define UVC_TRACE_CAPTURE (1 << 4) #define UVC_TRACE_CALLS (1 << 5) #define UVC_TRACE_IOCTL (1 << 6) #define UVC_TRACE_FRAME (1 << 7) #define UVC_TRACE_SUSPEND (1 << 8) #define UVC_TRACE_STATUS (1 << 9) #define UVC_TRACE_VIDEO (1 << 10) #define UVC_TRACE_STATS (1 << 11) #define UVC_TRACE_CLOCK (1 << 12) #define UVC_WARN_MINMAX 0 #define UVC_WARN_PROBE_DEF 1 #define UVC_WARN_XU_GET_RES 2 extern unsigned int uvc_clock_param; extern unsigned int uvc_no_drop_param; extern unsigned int uvc_trace_param; extern unsigned int uvc_timeout_param; #define uvc_trace(flag, msg...) \ do { \ if (uvc_trace_param & flag) \ printk(KERN_DEBUG "uvcvideo: " msg); \ } while (0) #define uvc_warn_once(dev, warn, msg...) \ do { \ if (!test_and_set_bit(warn, &dev->warnings)) \ printk(KERN_INFO "uvcvideo: " msg); \ } while (0) #define uvc_printk(level, msg...) \ printk(level "uvcvideo: " msg) /* -------------------------------------------------------------------------- * Internal functions. */ /* Core driver */ extern struct uvc_driver uvc_driver; extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id); /* Video buffers queue management. */ extern int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, int drop_corrupted); extern int uvc_alloc_buffers(struct uvc_video_queue *queue, struct v4l2_requestbuffers *rb); extern void uvc_free_buffers(struct uvc_video_queue *queue); extern int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf); extern int uvc_create_buffers(struct uvc_video_queue *queue, struct v4l2_create_buffers *v4l2_cb); extern int uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf); extern int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *v4l2_buf, int nonblocking); extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable); extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf); extern int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma); extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, poll_table *wait); #ifndef CONFIG_MMU extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, unsigned long pgoff); #endif extern int uvc_queue_allocated(struct uvc_video_queue *queue); static inline int uvc_queue_streaming(struct uvc_video_queue *queue) { return vb2_is_streaming(&queue->queue); } /* V4L2 interface */ extern const struct v4l2_file_operations uvc_fops; /* Media controller */ extern int uvc_mc_register_entities(struct uvc_video_chain *chain); extern void uvc_mc_cleanup_entity(struct uvc_entity *entity); /* Video */ extern int uvc_video_init(struct uvc_streaming *stream); extern int uvc_video_suspend(struct uvc_streaming *stream); extern int uvc_video_resume(struct uvc_streaming *stream, int reset); extern int uvc_video_enable(struct uvc_streaming *stream, int enable); extern int uvc_probe_video(struct uvc_streaming *stream, struct uvc_streaming_control *probe); extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, __u8 intfnum, __u8 cs, void *data, __u16 size); void uvc_video_clock_update(struct uvc_streaming *stream, struct v4l2_buffer *v4l2_buf, struct uvc_buffer *buf); /* Status */ extern int uvc_status_init(struct uvc_device *dev); extern void uvc_status_cleanup(struct uvc_device *dev); extern int uvc_status_start(struct uvc_device *dev, gfp_t flags); extern void uvc_status_stop(struct uvc_device *dev); /* Controls */ extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops; extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl); extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain, struct v4l2_querymenu *query_menu); extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, const struct uvc_control_mapping *mapping); extern int uvc_ctrl_init_device(struct uvc_device *dev); extern void uvc_ctrl_cleanup_device(struct uvc_device *dev); extern int uvc_ctrl_restore_values(struct uvc_device *dev); extern int uvc_ctrl_begin(struct uvc_video_chain *chain); extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, const struct v4l2_ext_control *xctrls, unsigned int xctrls_count); static inline int uvc_ctrl_commit(struct uvc_fh *handle, const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) { return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count); } static inline int uvc_ctrl_rollback(struct uvc_fh *handle) { return __uvc_ctrl_commit(handle, 1, NULL, 0); } extern int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); extern int uvc_ctrl_set(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); /* Utility functions */ extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, unsigned int n_terms, unsigned int threshold); extern uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator); extern struct usb_host_endpoint *uvc_find_endpoint( struct usb_host_interface *alts, __u8 epaddr); /* Quirks support */ void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, struct uvc_buffer *buf); /* debugfs and statistics */ int uvc_debugfs_init(void); void uvc_debugfs_cleanup(void); int uvc_debugfs_init_stream(struct uvc_streaming *stream); void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream); size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, size_t size); #endif