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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104/* 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; struct sg_table *sgt; struct scatterlist *sg; unsigned int offset; unsigned int length; unsigned int bytesused; /* req_payload_size: only used with isoc */ unsigned int req_payload_size;};
#define UVC_QUEUE_DISCONNECTED (1 << 0)#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1)
struct uvc_video_queue { struct vb2_queue queue;
unsigned int flags; __u32 sequence;
unsigned int buf_used;
bool use_sg;
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, struct device *dev, 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_MMUunsigned 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);
void uvcg_complete_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_ */