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- #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-core.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_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;
- struct mutex mutex; /* Protects 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);
- }
- #endif /* __KERNEL__ */
- #endif /* _UVC_QUEUE_H_ */
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