64 строки
1.3 KiB
C
64 строки
1.3 KiB
C
#ifndef _UVC_QUEUE_H_
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#define _UVC_QUEUE_H_
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#ifdef __KERNEL__
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#include <linux/kernel.h>
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#include <linux/poll.h>
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#include <linux/videodev2.h>
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#include <media/videobuf2-core.h>
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/* Maximum frame size in bytes, for sanity checking. */
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#define UVC_MAX_FRAME_SIZE (16*1024*1024)
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/* Maximum number of video buffers. */
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#define UVC_MAX_VIDEO_BUFFERS 32
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/* ------------------------------------------------------------------------
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* Structures.
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*/
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enum uvc_buffer_state {
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UVC_BUF_STATE_IDLE = 0,
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UVC_BUF_STATE_QUEUED = 1,
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UVC_BUF_STATE_ACTIVE = 2,
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UVC_BUF_STATE_DONE = 3,
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UVC_BUF_STATE_ERROR = 4,
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};
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struct uvc_buffer {
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struct vb2_buffer buf;
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struct list_head queue;
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enum uvc_buffer_state state;
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void *mem;
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unsigned int length;
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unsigned int bytesused;
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};
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#define UVC_QUEUE_DISCONNECTED (1 << 0)
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#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1)
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#define UVC_QUEUE_PAUSED (1 << 2)
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struct uvc_video_queue {
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struct vb2_queue queue;
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struct mutex mutex; /* Protects queue */
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unsigned int flags;
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__u32 sequence;
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unsigned int buf_used;
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spinlock_t irqlock; /* Protects flags and irqqueue */
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struct list_head irqqueue;
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};
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static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
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{
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return vb2_is_streaming(&queue->queue);
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}
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#endif /* __KERNEL__ */
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#endif /* _UVC_QUEUE_H_ */
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