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746facd3 VB |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * vivid-meta-out.c - meta output support functions. | |
4 | */ | |
5 | ||
6 | #include <linux/errno.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/videodev2.h> | |
9 | #include <media/v4l2-common.h> | |
10 | #include <linux/usb/video.h> | |
11 | ||
12 | #include "vivid-core.h" | |
13 | #include "vivid-kthread-out.h" | |
14 | #include "vivid-meta-out.h" | |
15 | ||
16 | static int meta_out_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, | |
17 | unsigned int *nplanes, unsigned int sizes[], | |
18 | struct device *alloc_devs[]) | |
19 | { | |
20 | struct vivid_dev *dev = vb2_get_drv_priv(vq); | |
21 | unsigned int size = sizeof(struct vivid_meta_out_buf); | |
22 | ||
23 | if (!vivid_is_webcam(dev)) | |
24 | return -EINVAL; | |
25 | ||
26 | if (*nplanes) { | |
27 | if (sizes[0] < size) | |
28 | return -EINVAL; | |
29 | } else { | |
30 | sizes[0] = size; | |
31 | } | |
32 | ||
746facd3 VB |
33 | *nplanes = 1; |
34 | return 0; | |
35 | } | |
36 | ||
37 | static int meta_out_buf_prepare(struct vb2_buffer *vb) | |
38 | { | |
39 | struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); | |
40 | unsigned int size = sizeof(struct vivid_meta_out_buf); | |
41 | ||
42 | dprintk(dev, 1, "%s\n", __func__); | |
43 | ||
44 | if (dev->buf_prepare_error) { | |
45 | /* | |
46 | * Error injection: test what happens if buf_prepare() returns | |
47 | * an error. | |
48 | */ | |
49 | dev->buf_prepare_error = false; | |
50 | return -EINVAL; | |
51 | } | |
52 | if (vb2_plane_size(vb, 0) < size) { | |
53 | dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n", | |
54 | __func__, vb2_plane_size(vb, 0), size); | |
55 | return -EINVAL; | |
56 | } | |
57 | vb2_set_plane_payload(vb, 0, size); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static void meta_out_buf_queue(struct vb2_buffer *vb) | |
63 | { | |
64 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); | |
65 | struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); | |
66 | struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb); | |
67 | ||
68 | dprintk(dev, 1, "%s\n", __func__); | |
69 | ||
70 | spin_lock(&dev->slock); | |
71 | list_add_tail(&buf->list, &dev->meta_out_active); | |
72 | spin_unlock(&dev->slock); | |
73 | } | |
74 | ||
75 | static int meta_out_start_streaming(struct vb2_queue *vq, unsigned int count) | |
76 | { | |
77 | struct vivid_dev *dev = vb2_get_drv_priv(vq); | |
78 | int err; | |
79 | ||
80 | dprintk(dev, 1, "%s\n", __func__); | |
81 | dev->meta_out_seq_count = 0; | |
82 | if (dev->start_streaming_error) { | |
83 | dev->start_streaming_error = false; | |
84 | err = -EINVAL; | |
85 | } else { | |
86 | err = vivid_start_generating_vid_out(dev, | |
87 | &dev->meta_out_streaming); | |
88 | } | |
89 | if (err) { | |
90 | struct vivid_buffer *buf, *tmp; | |
91 | ||
92 | list_for_each_entry_safe(buf, tmp, | |
93 | &dev->meta_out_active, list) { | |
94 | list_del(&buf->list); | |
95 | vb2_buffer_done(&buf->vb.vb2_buf, | |
96 | VB2_BUF_STATE_QUEUED); | |
97 | } | |
98 | } | |
99 | return err; | |
100 | } | |
101 | ||
102 | /* abort streaming and wait for last buffer */ | |
103 | static void meta_out_stop_streaming(struct vb2_queue *vq) | |
104 | { | |
105 | struct vivid_dev *dev = vb2_get_drv_priv(vq); | |
106 | ||
107 | dprintk(dev, 1, "%s\n", __func__); | |
108 | vivid_stop_generating_vid_out(dev, &dev->meta_out_streaming); | |
109 | } | |
110 | ||
111 | static void meta_out_buf_request_complete(struct vb2_buffer *vb) | |
112 | { | |
113 | struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); | |
114 | ||
115 | v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_meta_out); | |
116 | } | |
117 | ||
118 | const struct vb2_ops vivid_meta_out_qops = { | |
119 | .queue_setup = meta_out_queue_setup, | |
120 | .buf_prepare = meta_out_buf_prepare, | |
121 | .buf_queue = meta_out_buf_queue, | |
122 | .start_streaming = meta_out_start_streaming, | |
123 | .stop_streaming = meta_out_stop_streaming, | |
124 | .buf_request_complete = meta_out_buf_request_complete, | |
125 | .wait_prepare = vb2_ops_wait_prepare, | |
126 | .wait_finish = vb2_ops_wait_finish, | |
127 | }; | |
128 | ||
129 | int vidioc_enum_fmt_meta_out(struct file *file, void *priv, | |
130 | struct v4l2_fmtdesc *f) | |
131 | { | |
132 | struct vivid_dev *dev = video_drvdata(file); | |
133 | ||
134 | if (!vivid_is_webcam(dev)) | |
135 | return -EINVAL; | |
136 | ||
137 | if (f->index > 0) | |
138 | return -EINVAL; | |
139 | ||
140 | f->type = V4L2_BUF_TYPE_META_OUTPUT; | |
141 | f->pixelformat = V4L2_META_FMT_VIVID; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | int vidioc_g_fmt_meta_out(struct file *file, void *priv, | |
146 | struct v4l2_format *f) | |
147 | { | |
148 | struct vivid_dev *dev = video_drvdata(file); | |
149 | struct v4l2_meta_format *meta = &f->fmt.meta; | |
150 | ||
151 | if (!vivid_is_webcam(dev) || !dev->has_meta_out) | |
152 | return -EINVAL; | |
153 | ||
154 | meta->dataformat = V4L2_META_FMT_VIVID; | |
155 | meta->buffersize = sizeof(struct vivid_meta_out_buf); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | void vivid_meta_out_process(struct vivid_dev *dev, | |
160 | struct vivid_buffer *buf) | |
161 | { | |
162 | struct vivid_meta_out_buf *meta = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); | |
163 | ||
e3158a5e PY |
164 | v4l2_ctrl_s_ctrl(dev->brightness, meta->brightness); |
165 | v4l2_ctrl_s_ctrl(dev->contrast, meta->contrast); | |
166 | v4l2_ctrl_s_ctrl(dev->saturation, meta->saturation); | |
167 | v4l2_ctrl_s_ctrl(dev->hue, meta->hue); | |
168 | ||
746facd3 VB |
169 | dprintk(dev, 2, " %s brightness %u contrast %u saturation %u hue %d\n", |
170 | __func__, meta->brightness, meta->contrast, | |
171 | meta->saturation, meta->hue); | |
172 | } |