98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _UVC_QUEUE_H_
|
||
|
|
#define _UVC_QUEUE_H_
|
||
|
|
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/poll.h>
|
||
|
|
#include <linux/videodev2.h>
|
||
|
|
#include <media/videobuf2-v4l2.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 {
|
||
|
|
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);
|
||
|
|
|
||
|
|
unsigned int 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 /* __KERNEL__ */
|
||
|
|
|
||
|
|
#endif /* _UVC_QUEUE_H_ */
|
||
|
|
|