projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c139990e JS |
1 | /* |
| 2 | * videobuf2-v4l2.h - V4L2 driver helper framework | |
| 3 | * | |
| 4 | * Copyright (C) 2010 Samsung Electronics | |
| 5 | * | |
| 6 | * Author: Pawel Osciak <[email protected]> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License as published by | |
| 10 | * the Free Software Foundation. | |
| 11 | */ | |
| 12 | #ifndef _MEDIA_VIDEOBUF2_V4L2_H | |
| 13 | #define _MEDIA_VIDEOBUF2_V4L2_H | |
| 14 | ||
| 2d700715 | 15 | #include <linux/videodev2.h> |
| c139990e JS |
16 | #include <media/videobuf2-core.h> |
| 17 | ||
| bed04f93 JS |
18 | #if VB2_MAX_FRAME != VIDEO_MAX_FRAME |
| 19 | #error VB2_MAX_FRAME != VIDEO_MAX_FRAME | |
| 20 | #endif | |
| 21 | ||
| 22 | #if VB2_MAX_PLANES != VIDEO_MAX_PLANES | |
| 23 | #error VB2_MAX_PLANES != VIDEO_MAX_PLANES | |
| 24 | #endif | |
| 25 | ||
| 2d700715 JS |
26 | /** |
| 27 | * struct vb2_v4l2_buffer - video buffer information for v4l2 | |
| 28 | * @vb2_buf: video buffer 2 | |
| 29 | * @flags: buffer informational flags | |
| 30 | * @field: enum v4l2_field; field order of the image in the buffer | |
| 2d700715 JS |
31 | * @timecode: frame timecode |
| 32 | * @sequence: sequence count of this frame | |
| 33 | * Should contain enough information to be able to cover all the fields | |
| 34 | * of struct v4l2_buffer at videodev2.h | |
| 35 | */ | |
| 36 | struct vb2_v4l2_buffer { | |
| 37 | struct vb2_buffer vb2_buf; | |
| 38 | ||
| 39 | __u32 flags; | |
| 40 | __u32 field; | |
| 2d700715 JS |
41 | struct v4l2_timecode timecode; |
| 42 | __u32 sequence; | |
| 43 | }; | |
| 44 | ||
| d383b579 | 45 | /* |
| 2d700715 JS |
46 | * to_vb2_v4l2_buffer() - cast struct vb2_buffer * to struct vb2_v4l2_buffer * |
| 47 | */ | |
| 48 | #define to_vb2_v4l2_buffer(vb) \ | |
| d383b579 | 49 | container_of(vb, struct vb2_v4l2_buffer, vb2_buf) |
| 2d700715 | 50 | |
| 3c5be988 JS |
51 | int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b); |
| 52 | int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req); | |
| 53 | ||
| 54 | int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create); | |
| 55 | int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b); | |
| 56 | ||
| 57 | int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b); | |
| 58 | int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb); | |
| 59 | int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking); | |
| 60 | ||
| 61 | int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type); | |
| 62 | int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type); | |
| 63 | ||
| 64 | int __must_check vb2_queue_init(struct vb2_queue *q); | |
| 65 | void vb2_queue_release(struct vb2_queue *q); | |
| af3bac1a JS |
66 | unsigned int vb2_poll(struct vb2_queue *q, struct file *file, |
| 67 | poll_table *wait); | |
| 3c5be988 JS |
68 | |
| 69 | /* | |
| 70 | * The following functions are not part of the vb2 core API, but are simple | |
| 71 | * helper functions that you can use in your struct v4l2_file_operations, | |
| 72 | * struct v4l2_ioctl_ops and struct vb2_ops. They will serialize if vb2_queue->lock | |
| 73 | * or video_device->lock is set, and they will set and test vb2_queue->owner | |
| 74 | * to check if the calling filehandle is permitted to do the queuing operation. | |
| 75 | */ | |
| 76 | ||
| 77 | /* struct v4l2_ioctl_ops helpers */ | |
| 78 | ||
| 79 | int vb2_ioctl_reqbufs(struct file *file, void *priv, | |
| 80 | struct v4l2_requestbuffers *p); | |
| 81 | int vb2_ioctl_create_bufs(struct file *file, void *priv, | |
| 82 | struct v4l2_create_buffers *p); | |
| 83 | int vb2_ioctl_prepare_buf(struct file *file, void *priv, | |
| 84 | struct v4l2_buffer *p); | |
| 85 | int vb2_ioctl_querybuf(struct file *file, void *priv, struct v4l2_buffer *p); | |
| 86 | int vb2_ioctl_qbuf(struct file *file, void *priv, struct v4l2_buffer *p); | |
| 87 | int vb2_ioctl_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p); | |
| 88 | int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i); | |
| 89 | int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i); | |
| 90 | int vb2_ioctl_expbuf(struct file *file, void *priv, | |
| 91 | struct v4l2_exportbuffer *p); | |
| 92 | ||
| 93 | /* struct v4l2_file_operations helpers */ | |
| 94 | ||
| 95 | int vb2_fop_mmap(struct file *file, struct vm_area_struct *vma); | |
| 96 | int vb2_fop_release(struct file *file); | |
| 97 | int _vb2_fop_release(struct file *file, struct mutex *lock); | |
| 98 | ssize_t vb2_fop_write(struct file *file, const char __user *buf, | |
| 99 | size_t count, loff_t *ppos); | |
| 100 | ssize_t vb2_fop_read(struct file *file, char __user *buf, | |
| 101 | size_t count, loff_t *ppos); | |
| 102 | unsigned int vb2_fop_poll(struct file *file, poll_table *wait); | |
| 103 | #ifndef CONFIG_MMU | |
| 104 | unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr, | |
| 105 | unsigned long len, unsigned long pgoff, unsigned long flags); | |
| 106 | #endif | |
| 107 | ||
| 108 | /* struct vb2_ops helpers, only use if vq->lock is non-NULL. */ | |
| 109 | ||
| 110 | void vb2_ops_wait_prepare(struct vb2_queue *vq); | |
| 111 | void vb2_ops_wait_finish(struct vb2_queue *vq); | |
| 112 | ||
| c139990e | 113 | #endif /* _MEDIA_VIDEOBUF2_V4L2_H */ |