summaryrefslogtreecommitdiff
path: root/drivers/media/platform/vivid/vivid-meta-out.c
blob: ff8a039aba72e8159d4ae5791c4a93ac2f789e0d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
// SPDX-License-Identifier: GPL-2.0-only
/*
 * vivid-meta-out.c - meta output support functions.
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/usb/video.h>

#include "vivid-core.h"
#include "vivid-kthread-out.h"
#include "vivid-meta-out.h"

static int meta_out_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
				unsigned int *nplanes, unsigned int sizes[],
				struct device *alloc_devs[])
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	unsigned int size =  sizeof(struct vivid_meta_out_buf);

	if (!vivid_is_webcam(dev))
		return -EINVAL;

	if (*nplanes) {
		if (sizes[0] < size)
			return -EINVAL;
	} else {
		sizes[0] = size;
	}

	if (vq->num_buffers + *nbuffers < 2)
		*nbuffers = 2 - vq->num_buffers;

	*nplanes = 1;
	return 0;
}

static int meta_out_buf_prepare(struct vb2_buffer *vb)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	unsigned int size = sizeof(struct vivid_meta_out_buf);

	dprintk(dev, 1, "%s\n", __func__);

	if (dev->buf_prepare_error) {
		/*
		 * Error injection: test what happens if buf_prepare() returns
		 * an error.
		 */
		dev->buf_prepare_error = false;
		return -EINVAL;
	}
	if (vb2_plane_size(vb, 0) < size) {
		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
			__func__, vb2_plane_size(vb, 0), size);
		return -EINVAL;
	}
	vb2_set_plane_payload(vb, 0, size);

	return 0;
}

static void meta_out_buf_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);

	dprintk(dev, 1, "%s\n", __func__);

	spin_lock(&dev->slock);
	list_add_tail(&buf->list, &dev->meta_out_active);
	spin_unlock(&dev->slock);
}

static int meta_out_start_streaming(struct vb2_queue *vq, unsigned int count)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	int err;

	dprintk(dev, 1, "%s\n", __func__);
	dev->meta_out_seq_count = 0;
	if (dev->start_streaming_error) {
		dev->start_streaming_error = false;
		err = -EINVAL;
	} else {
		err = vivid_start_generating_vid_out(dev,
						     &dev->meta_out_streaming);
	}
	if (err) {
		struct vivid_buffer *buf, *tmp;

		list_for_each_entry_safe(buf, tmp,
					 &dev->meta_out_active, list) {
			list_del(&buf->list);
			vb2_buffer_done(&buf->vb.vb2_buf,
					VB2_BUF_STATE_QUEUED);
		}
	}
	return err;
}

/* abort streaming and wait for last buffer */
static void meta_out_stop_streaming(struct vb2_queue *vq)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);

	dprintk(dev, 1, "%s\n", __func__);
	vivid_stop_generating_vid_out(dev, &dev->meta_out_streaming);
}

static void meta_out_buf_request_complete(struct vb2_buffer *vb)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);

	v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_meta_out);
}

const struct vb2_ops vivid_meta_out_qops = {
	.queue_setup            = meta_out_queue_setup,
	.buf_prepare            = meta_out_buf_prepare,
	.buf_queue              = meta_out_buf_queue,
	.start_streaming        = meta_out_start_streaming,
	.stop_streaming         = meta_out_stop_streaming,
	.buf_request_complete   = meta_out_buf_request_complete,
	.wait_prepare           = vb2_ops_wait_prepare,
	.wait_finish            = vb2_ops_wait_finish,
};

int vidioc_enum_fmt_meta_out(struct file *file, void  *priv,
			     struct v4l2_fmtdesc *f)
{
	struct vivid_dev *dev = video_drvdata(file);

	if (!vivid_is_webcam(dev))
		return -EINVAL;

	if (f->index > 0)
		return -EINVAL;

	f->type = V4L2_BUF_TYPE_META_OUTPUT;
	f->pixelformat = V4L2_META_FMT_VIVID;
	return 0;
}

int vidioc_g_fmt_meta_out(struct file *file, void *priv,
			  struct v4l2_format *f)
{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_meta_format *meta = &f->fmt.meta;

	if (!vivid_is_webcam(dev) || !dev->has_meta_out)
		return -EINVAL;

	meta->dataformat = V4L2_META_FMT_VIVID;
	meta->buffersize = sizeof(struct vivid_meta_out_buf);
	return 0;
}

void vivid_meta_out_process(struct vivid_dev *dev,
			    struct vivid_buffer *buf)
{
	struct vivid_meta_out_buf *meta = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);

	tpg_s_brightness(&dev->tpg, meta->brightness);
	tpg_s_contrast(&dev->tpg, meta->contrast);
	tpg_s_saturation(&dev->tpg, meta->saturation);
	tpg_s_hue(&dev->tpg, meta->hue);
	dprintk(dev, 2, " %s brightness %u contrast %u saturation %u hue %d\n",
		__func__, meta->brightness, meta->contrast,
		meta->saturation, meta->hue);
}