1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16#ifndef _VIDEOBUF_CORE_H
17#define _VIDEOBUF_CORE_H
18
19#include <linux/poll.h>
20#include <linux/videodev2.h>
21
22#define UNSET (-1U)
23
24
25struct videobuf_buffer;
26struct videobuf_queue;
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51struct videobuf_mapping {
52 unsigned int count;
53 struct videobuf_queue *q;
54};
55
56enum videobuf_state {
57 VIDEOBUF_NEEDS_INIT = 0,
58 VIDEOBUF_PREPARED = 1,
59 VIDEOBUF_QUEUED = 2,
60 VIDEOBUF_ACTIVE = 3,
61 VIDEOBUF_DONE = 4,
62 VIDEOBUF_ERROR = 5,
63 VIDEOBUF_IDLE = 6,
64};
65
66struct videobuf_buffer {
67 unsigned int i;
68 u32 magic;
69
70
71 unsigned int width;
72 unsigned int height;
73 unsigned int bytesperline;
74 unsigned long size;
75 unsigned int input;
76 enum v4l2_field field;
77 enum videobuf_state state;
78 struct list_head stream;
79
80
81 struct list_head queue;
82 wait_queue_head_t done;
83 unsigned int field_count;
84 struct timeval ts;
85
86
87 enum v4l2_memory memory;
88
89
90 size_t bsize;
91
92
93 size_t boff;
94
95
96 unsigned long baddr;
97
98
99 struct videobuf_mapping *map;
100
101
102 int privsize;
103 void *priv;
104};
105
106struct videobuf_queue_ops {
107 int (*buf_setup)(struct videobuf_queue *q,
108 unsigned int *count, unsigned int *size);
109 int (*buf_prepare)(struct videobuf_queue *q,
110 struct videobuf_buffer *vb,
111 enum v4l2_field field);
112 void (*buf_queue)(struct videobuf_queue *q,
113 struct videobuf_buffer *vb);
114 void (*buf_release)(struct videobuf_queue *q,
115 struct videobuf_buffer *vb);
116};
117
118#define MAGIC_QTYPE_OPS 0x12261003
119
120
121struct videobuf_qtype_ops {
122 u32 magic;
123
124 struct videobuf_buffer *(*alloc_vb)(size_t size);
125 void *(*vaddr) (struct videobuf_buffer *buf);
126 int (*iolock) (struct videobuf_queue *q,
127 struct videobuf_buffer *vb,
128 struct v4l2_framebuffer *fbuf);
129 int (*sync) (struct videobuf_queue *q,
130 struct videobuf_buffer *buf);
131 int (*mmap_mapper) (struct videobuf_queue *q,
132 struct videobuf_buffer *buf,
133 struct vm_area_struct *vma);
134};
135
136struct videobuf_queue {
137 struct mutex vb_lock;
138 struct mutex *ext_lock;
139 spinlock_t *irqlock;
140 struct device *dev;
141
142 wait_queue_head_t wait;
143
144 enum v4l2_buf_type type;
145 unsigned int inputs;
146 unsigned int msize;
147 enum v4l2_field field;
148 enum v4l2_field last;
149 struct videobuf_buffer *bufs[VIDEO_MAX_FRAME];
150 const struct videobuf_queue_ops *ops;
151 struct videobuf_qtype_ops *int_ops;
152
153 unsigned int streaming:1;
154 unsigned int reading:1;
155
156
157 struct list_head stream;
158
159
160 unsigned int read_off;
161 struct videobuf_buffer *read_buf;
162
163
164 void *priv_data;
165};
166
167static inline void videobuf_queue_lock(struct videobuf_queue *q)
168{
169 if (!q->ext_lock)
170 mutex_lock(&q->vb_lock);
171}
172
173static inline void videobuf_queue_unlock(struct videobuf_queue *q)
174{
175 if (!q->ext_lock)
176 mutex_unlock(&q->vb_lock);
177}
178
179int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb,
180 int non_blocking, int intr);
181int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,
182 struct v4l2_framebuffer *fbuf);
183
184struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q);
185
186
187void *videobuf_queue_to_vaddr(struct videobuf_queue *q,
188 struct videobuf_buffer *buf);
189
190void videobuf_queue_core_init(struct videobuf_queue *q,
191 const struct videobuf_queue_ops *ops,
192 struct device *dev,
193 spinlock_t *irqlock,
194 enum v4l2_buf_type type,
195 enum v4l2_field field,
196 unsigned int msize,
197 void *priv,
198 struct videobuf_qtype_ops *int_ops,
199 struct mutex *ext_lock);
200int videobuf_queue_is_busy(struct videobuf_queue *q);
201void videobuf_queue_cancel(struct videobuf_queue *q);
202
203enum v4l2_field videobuf_next_field(struct videobuf_queue *q);
204int videobuf_reqbufs(struct videobuf_queue *q,
205 struct v4l2_requestbuffers *req);
206int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b);
207int videobuf_qbuf(struct videobuf_queue *q,
208 struct v4l2_buffer *b);
209int videobuf_dqbuf(struct videobuf_queue *q,
210 struct v4l2_buffer *b, int nonblocking);
211int videobuf_streamon(struct videobuf_queue *q);
212int videobuf_streamoff(struct videobuf_queue *q);
213
214void videobuf_stop(struct videobuf_queue *q);
215
216int videobuf_read_start(struct videobuf_queue *q);
217void videobuf_read_stop(struct videobuf_queue *q);
218ssize_t videobuf_read_stream(struct videobuf_queue *q,
219 char __user *data, size_t count, loff_t *ppos,
220 int vbihack, int nonblocking);
221ssize_t videobuf_read_one(struct videobuf_queue *q,
222 char __user *data, size_t count, loff_t *ppos,
223 int nonblocking);
224unsigned int videobuf_poll_stream(struct file *file,
225 struct videobuf_queue *q,
226 poll_table *wait);
227
228int videobuf_mmap_setup(struct videobuf_queue *q,
229 unsigned int bcount, unsigned int bsize,
230 enum v4l2_memory memory);
231int __videobuf_mmap_setup(struct videobuf_queue *q,
232 unsigned int bcount, unsigned int bsize,
233 enum v4l2_memory memory);
234int videobuf_mmap_free(struct videobuf_queue *q);
235int videobuf_mmap_mapper(struct videobuf_queue *q,
236 struct vm_area_struct *vma);
237
238#endif
239