This source file includes following definitions.
- uvc_queue_streaming
1
2 #ifndef _UVC_QUEUE_H_
3 #define _UVC_QUEUE_H_
4
5 #include <linux/list.h>
6 #include <linux/poll.h>
7 #include <linux/spinlock.h>
8
9 #include <media/videobuf2-v4l2.h>
10
11 struct file;
12 struct mutex;
13
14
15 #define UVC_MAX_FRAME_SIZE (16*1024*1024)
16
17 #define UVC_MAX_VIDEO_BUFFERS 32
18
19
20
21
22
23 enum uvc_buffer_state {
24 UVC_BUF_STATE_IDLE = 0,
25 UVC_BUF_STATE_QUEUED = 1,
26 UVC_BUF_STATE_ACTIVE = 2,
27 UVC_BUF_STATE_DONE = 3,
28 UVC_BUF_STATE_ERROR = 4,
29 };
30
31 struct uvc_buffer {
32 struct vb2_v4l2_buffer buf;
33 struct list_head queue;
34
35 enum uvc_buffer_state state;
36 void *mem;
37 unsigned int length;
38 unsigned int bytesused;
39 };
40
41 #define UVC_QUEUE_DISCONNECTED (1 << 0)
42 #define UVC_QUEUE_DROP_INCOMPLETE (1 << 1)
43 #define UVC_QUEUE_PAUSED (1 << 2)
44
45 struct uvc_video_queue {
46 struct vb2_queue queue;
47
48 unsigned int flags;
49 __u32 sequence;
50
51 unsigned int buf_used;
52
53 spinlock_t irqlock;
54 struct list_head irqqueue;
55 };
56
57 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
58 {
59 return vb2_is_streaming(&queue->queue);
60 }
61
62 int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
63 struct mutex *lock);
64
65 void uvcg_free_buffers(struct uvc_video_queue *queue);
66
67 int uvcg_alloc_buffers(struct uvc_video_queue *queue,
68 struct v4l2_requestbuffers *rb);
69
70 int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf);
71
72 int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf);
73
74 int uvcg_dequeue_buffer(struct uvc_video_queue *queue,
75 struct v4l2_buffer *buf, int nonblocking);
76
77 __poll_t uvcg_queue_poll(struct uvc_video_queue *queue,
78 struct file *file, poll_table *wait);
79
80 int uvcg_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma);
81
82 #ifndef CONFIG_MMU
83 unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue,
84 unsigned long pgoff);
85 #endif
86
87 void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect);
88
89 int uvcg_queue_enable(struct uvc_video_queue *queue, int enable);
90
91 struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue,
92 struct uvc_buffer *buf);
93
94 struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue);
95
96 #endif
97