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// 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);
v4l2_ctrl_s_ctrl(dev->brightness, meta->brightness);
v4l2_ctrl_s_ctrl(dev->contrast, meta->contrast);
v4l2_ctrl_s_ctrl(dev->saturation, meta->saturation);
v4l2_ctrl_s_ctrl(dev->hue, meta->hue);
dprintk(dev, 2, " %s brightness %u contrast %u saturation %u hue %d\n",
__func__, meta->brightness, meta->contrast,
meta->saturation, meta->hue);
}
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