blob: 1812a8ecc5d0d567cbb48c39c69c0b21ca5efb80 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
#ifndef _UVC_QUEUE_H_
#define _UVC_QUEUE_H_
#ifdef __KERNEL__
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/videodev2.h>
/* 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 {
unsigned long vma_use_count;
struct list_head stream;
/* Touched by interrupt handler. */
struct v4l2_buffer buf;
struct list_head queue;
wait_queue_head_t wait;
enum uvc_buffer_state state;
};
#define UVC_QUEUE_STREAMING (1 << 0)
#define UVC_QUEUE_DISCONNECTED (1 << 1)
#define UVC_QUEUE_DROP_INCOMPLETE (1 << 2)
#define UVC_QUEUE_PAUSED (1 << 3)
struct uvc_video_queue {
enum v4l2_buf_type type;
void *mem;
unsigned int flags;
__u32 sequence;
unsigned int count;
unsigned int buf_size;
unsigned int buf_used;
struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
struct mutex mutex; /* protects buffers and mainqueue */
spinlock_t irqlock; /* protects irqqueue */
struct list_head mainqueue;
struct list_head irqqueue;
};
static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
{
return queue->flags & UVC_QUEUE_STREAMING;
}
#endif /* __KERNEL__ */
#endif /* _UVC_QUEUE_H_ */
|
