1#ifndef _UVC_QUEUE_H_
 2#define _UVC_QUEUE_H_
 3
 4#ifdef __KERNEL__
 5
 6#include <linux/kernel.h>
 7#include <linux/poll.h>
 8#include <linux/videodev2.h>
 
 9
10/* Maximum frame size in bytes, for sanity checking. */
11#define UVC_MAX_FRAME_SIZE	(16*1024*1024)
12/* Maximum number of video buffers. */
13#define UVC_MAX_VIDEO_BUFFERS	32
14
15/* ------------------------------------------------------------------------
16 * Structures.
17 */
18
19enum uvc_buffer_state {
20	UVC_BUF_STATE_IDLE	= 0,
21	UVC_BUF_STATE_QUEUED	= 1,
22	UVC_BUF_STATE_ACTIVE	= 2,
23	UVC_BUF_STATE_DONE	= 3,
24	UVC_BUF_STATE_ERROR	= 4,
25};
26
27struct uvc_buffer {
28	unsigned long vma_use_count;
29	struct list_head stream;
30
31	/* Touched by interrupt handler. */
32	struct v4l2_buffer buf;
33	struct list_head queue;
34	wait_queue_head_t wait;
35	enum uvc_buffer_state state;
 
 
 
36};
37
38#define UVC_QUEUE_STREAMING		(1 << 0)
39#define UVC_QUEUE_DISCONNECTED		(1 << 1)
40#define UVC_QUEUE_DROP_INCOMPLETE	(1 << 2)
41#define UVC_QUEUE_PAUSED		(1 << 3)
42
43struct uvc_video_queue {
44	enum v4l2_buf_type type;
 
45
46	void *mem;
47	unsigned int flags;
48	__u32 sequence;
49
50	unsigned int count;
51	unsigned int buf_size;
52	unsigned int buf_used;
53	struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
54	struct mutex mutex;	/* protects buffers and mainqueue */
55	spinlock_t irqlock;	/* protects irqqueue */
56
57	struct list_head mainqueue;
58	struct list_head irqqueue;
59};
60
61static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
62{
63	return queue->flags & UVC_QUEUE_STREAMING;
64}
65
66#endif /* __KERNEL__ */
67
68#endif /* _UVC_QUEUE_H_ */
69

 1#ifndef _UVC_QUEUE_H_
 2#define _UVC_QUEUE_H_
 3
 4#ifdef __KERNEL__
 5
 6#include <linux/kernel.h>
 7#include <linux/poll.h>
 8#include <linux/videodev2.h>
 9#include <media/videobuf2-core.h>
10
11/* Maximum frame size in bytes, for sanity checking. */
12#define UVC_MAX_FRAME_SIZE	(16*1024*1024)
13/* Maximum number of video buffers. */
14#define UVC_MAX_VIDEO_BUFFERS	32
15
16/* ------------------------------------------------------------------------
17 * Structures.
18 */
19
20enum uvc_buffer_state {
21	UVC_BUF_STATE_IDLE	= 0,
22	UVC_BUF_STATE_QUEUED	= 1,
23	UVC_BUF_STATE_ACTIVE	= 2,
24	UVC_BUF_STATE_DONE	= 3,
25	UVC_BUF_STATE_ERROR	= 4,
26};
27
28struct uvc_buffer {
29	struct vb2_buffer buf;
 
 
 
 
30	struct list_head queue;
31
32	enum uvc_buffer_state state;
33	void *mem;
34	unsigned int length;
35	unsigned int bytesused;
36};
37
38#define UVC_QUEUE_DISCONNECTED		(1 << 0)
39#define UVC_QUEUE_DROP_INCOMPLETE	(1 << 1)
40#define UVC_QUEUE_PAUSED		(1 << 2)
 
41
42struct uvc_video_queue {
43	struct vb2_queue queue;
44	struct mutex mutex;	/* Protects queue */
45
 
46	unsigned int flags;
47	__u32 sequence;
48
 
 
49	unsigned int buf_used;
 
 
 
50
51	spinlock_t irqlock;	/* Protects flags and irqqueue */
52	struct list_head irqqueue;
53};
54
55static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
56{
57	return vb2_is_streaming(&queue->queue);
58}
59
60#endif /* __KERNEL__ */
61
62#endif /* _UVC_QUEUE_H_ */
63