1 // SPDX-License-Identifier: GPL-2.0-only
3 * vivid-meta-out.c - meta output support functions.
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>
12 #include "vivid-core.h"
13 #include "vivid-kthread-out.h"
14 #include "vivid-meta-out.h"
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
[])
20 struct vivid_dev
*dev
= vb2_get_drv_priv(vq
);
21 unsigned int size
= sizeof(struct vivid_meta_out_buf
);
23 if (!vivid_is_webcam(dev
))
33 if (vq
->num_buffers
+ *nbuffers
< 2)
34 *nbuffers
= 2 - vq
->num_buffers
;
40 static int meta_out_buf_prepare(struct vb2_buffer
*vb
)
42 struct vivid_dev
*dev
= vb2_get_drv_priv(vb
->vb2_queue
);
43 unsigned int size
= sizeof(struct vivid_meta_out_buf
);
45 dprintk(dev
, 1, "%s\n", __func__
);
47 if (dev
->buf_prepare_error
) {
49 * Error injection: test what happens if buf_prepare() returns
52 dev
->buf_prepare_error
= false;
55 if (vb2_plane_size(vb
, 0) < size
) {
56 dprintk(dev
, 1, "%s data will not fit into plane (%lu < %u)\n",
57 __func__
, vb2_plane_size(vb
, 0), size
);
60 vb2_set_plane_payload(vb
, 0, size
);
65 static void meta_out_buf_queue(struct vb2_buffer
*vb
)
67 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
68 struct vivid_dev
*dev
= vb2_get_drv_priv(vb
->vb2_queue
);
69 struct vivid_buffer
*buf
= container_of(vbuf
, struct vivid_buffer
, vb
);
71 dprintk(dev
, 1, "%s\n", __func__
);
73 spin_lock(&dev
->slock
);
74 list_add_tail(&buf
->list
, &dev
->meta_out_active
);
75 spin_unlock(&dev
->slock
);
78 static int meta_out_start_streaming(struct vb2_queue
*vq
, unsigned int count
)
80 struct vivid_dev
*dev
= vb2_get_drv_priv(vq
);
83 dprintk(dev
, 1, "%s\n", __func__
);
84 dev
->meta_out_seq_count
= 0;
85 if (dev
->start_streaming_error
) {
86 dev
->start_streaming_error
= false;
89 err
= vivid_start_generating_vid_out(dev
,
90 &dev
->meta_out_streaming
);
93 struct vivid_buffer
*buf
, *tmp
;
95 list_for_each_entry_safe(buf
, tmp
,
96 &dev
->meta_out_active
, list
) {
98 vb2_buffer_done(&buf
->vb
.vb2_buf
,
99 VB2_BUF_STATE_QUEUED
);
105 /* abort streaming and wait for last buffer */
106 static void meta_out_stop_streaming(struct vb2_queue
*vq
)
108 struct vivid_dev
*dev
= vb2_get_drv_priv(vq
);
110 dprintk(dev
, 1, "%s\n", __func__
);
111 vivid_stop_generating_vid_out(dev
, &dev
->meta_out_streaming
);
114 static void meta_out_buf_request_complete(struct vb2_buffer
*vb
)
116 struct vivid_dev
*dev
= vb2_get_drv_priv(vb
->vb2_queue
);
118 v4l2_ctrl_request_complete(vb
->req_obj
.req
, &dev
->ctrl_hdl_meta_out
);
121 const struct vb2_ops vivid_meta_out_qops
= {
122 .queue_setup
= meta_out_queue_setup
,
123 .buf_prepare
= meta_out_buf_prepare
,
124 .buf_queue
= meta_out_buf_queue
,
125 .start_streaming
= meta_out_start_streaming
,
126 .stop_streaming
= meta_out_stop_streaming
,
127 .buf_request_complete
= meta_out_buf_request_complete
,
128 .wait_prepare
= vb2_ops_wait_prepare
,
129 .wait_finish
= vb2_ops_wait_finish
,
132 int vidioc_enum_fmt_meta_out(struct file
*file
, void *priv
,
133 struct v4l2_fmtdesc
*f
)
135 struct vivid_dev
*dev
= video_drvdata(file
);
137 if (!vivid_is_webcam(dev
))
143 f
->type
= V4L2_BUF_TYPE_META_OUTPUT
;
144 f
->pixelformat
= V4L2_META_FMT_VIVID
;
148 int vidioc_g_fmt_meta_out(struct file
*file
, void *priv
,
149 struct v4l2_format
*f
)
151 struct vivid_dev
*dev
= video_drvdata(file
);
152 struct v4l2_meta_format
*meta
= &f
->fmt
.meta
;
154 if (!vivid_is_webcam(dev
) || !dev
->has_meta_out
)
157 meta
->dataformat
= V4L2_META_FMT_VIVID
;
158 meta
->buffersize
= sizeof(struct vivid_meta_out_buf
);
162 void vivid_meta_out_process(struct vivid_dev
*dev
,
163 struct vivid_buffer
*buf
)
165 struct vivid_meta_out_buf
*meta
= vb2_plane_vaddr(&buf
->vb
.vb2_buf
, 0);
167 v4l2_ctrl_s_ctrl(dev
->brightness
, meta
->brightness
);
168 v4l2_ctrl_s_ctrl(dev
->contrast
, meta
->contrast
);
169 v4l2_ctrl_s_ctrl(dev
->saturation
, meta
->saturation
);
170 v4l2_ctrl_s_ctrl(dev
->hue
, meta
->hue
);
172 dprintk(dev
, 2, " %s brightness %u contrast %u saturation %u hue %d\n",
173 __func__
, meta
->brightness
, meta
->contrast
,
174 meta
->saturation
, meta
->hue
);