mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
2.4 KiB
97 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _UVC_QUEUE_H_ |
|
#define _UVC_QUEUE_H_ |
|
|
|
#include <linux/list.h> |
|
#include <linux/poll.h> |
|
#include <linux/spinlock.h> |
|
|
|
#include <media/videobuf2-v4l2.h> |
|
|
|
struct file; |
|
struct mutex; |
|
|
|
/* Maximum frame size in bytes, for sanity checking. */ |
|
#define UVC_MAX_FRAME_SIZE (16*1024*1024) |
|
/* Maximum number of video buffers. */ |
|
#define UVC_MAX_VIDEO_BUFFERS 32 |
|
|
|
/* ------------------------------------------------------------------------ |
|
* Structures. |
|
*/ |
|
|
|
enum uvc_buffer_state { |
|
UVC_BUF_STATE_IDLE = 0, |
|
UVC_BUF_STATE_QUEUED = 1, |
|
UVC_BUF_STATE_ACTIVE = 2, |
|
UVC_BUF_STATE_DONE = 3, |
|
UVC_BUF_STATE_ERROR = 4, |
|
}; |
|
|
|
struct uvc_buffer { |
|
struct vb2_v4l2_buffer buf; |
|
struct list_head queue; |
|
|
|
enum uvc_buffer_state state; |
|
void *mem; |
|
unsigned int length; |
|
unsigned int bytesused; |
|
}; |
|
|
|
#define UVC_QUEUE_DISCONNECTED (1 << 0) |
|
#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1) |
|
#define UVC_QUEUE_PAUSED (1 << 2) |
|
|
|
struct uvc_video_queue { |
|
struct vb2_queue queue; |
|
|
|
unsigned int flags; |
|
__u32 sequence; |
|
|
|
unsigned int buf_used; |
|
|
|
spinlock_t irqlock; /* Protects flags and irqqueue */ |
|
struct list_head irqqueue; |
|
}; |
|
|
|
static inline int uvc_queue_streaming(struct uvc_video_queue *queue) |
|
{ |
|
return vb2_is_streaming(&queue->queue); |
|
} |
|
|
|
int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, |
|
struct mutex *lock); |
|
|
|
void uvcg_free_buffers(struct uvc_video_queue *queue); |
|
|
|
int uvcg_alloc_buffers(struct uvc_video_queue *queue, |
|
struct v4l2_requestbuffers *rb); |
|
|
|
int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf); |
|
|
|
int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf); |
|
|
|
int uvcg_dequeue_buffer(struct uvc_video_queue *queue, |
|
struct v4l2_buffer *buf, int nonblocking); |
|
|
|
__poll_t uvcg_queue_poll(struct uvc_video_queue *queue, |
|
struct file *file, poll_table *wait); |
|
|
|
int uvcg_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma); |
|
|
|
#ifndef CONFIG_MMU |
|
unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue, |
|
unsigned long pgoff); |
|
#endif /* CONFIG_MMU */ |
|
|
|
void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect); |
|
|
|
int uvcg_queue_enable(struct uvc_video_queue *queue, int enable); |
|
|
|
struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue, |
|
struct uvc_buffer *buf); |
|
|
|
struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue); |
|
|
|
#endif /* _UVC_QUEUE_H_ */ |
|
|
|
|