// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vivid-meta-out.c - meta output support functions.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <linux/usb/video.h>
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#include "vivid-core.h"
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#include "vivid-kthread-out.h"
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#include "vivid-meta-out.h"
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static int meta_out_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
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unsigned int *nplanes, unsigned int sizes[],
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struct device *alloc_devs[])
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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unsigned int size = sizeof(struct vivid_meta_out_buf);
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if (!vivid_is_webcam(dev))
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return -EINVAL;
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if (*nplanes) {
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if (sizes[0] < size)
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return -EINVAL;
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} else {
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sizes[0] = size;
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}
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if (vq->num_buffers + *nbuffers < 2)
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*nbuffers = 2 - vq->num_buffers;
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*nplanes = 1;
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return 0;
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}
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static int meta_out_buf_prepare(struct vb2_buffer *vb)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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unsigned int size = sizeof(struct vivid_meta_out_buf);
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dprintk(dev, 1, "%s\n", __func__);
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if (dev->buf_prepare_error) {
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/*
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* Error injection: test what happens if buf_prepare() returns
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* an error.
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*/
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dev->buf_prepare_error = false;
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return -EINVAL;
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}
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if (vb2_plane_size(vb, 0) < size) {
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dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
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__func__, vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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return 0;
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}
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static void meta_out_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
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dprintk(dev, 1, "%s\n", __func__);
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spin_lock(&dev->slock);
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list_add_tail(&buf->list, &dev->meta_out_active);
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spin_unlock(&dev->slock);
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}
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static int meta_out_start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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int err;
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dprintk(dev, 1, "%s\n", __func__);
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dev->meta_out_seq_count = 0;
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if (dev->start_streaming_error) {
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dev->start_streaming_error = false;
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err = -EINVAL;
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} else {
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err = vivid_start_generating_vid_out(dev,
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&dev->meta_out_streaming);
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}
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if (err) {
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struct vivid_buffer *buf, *tmp;
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list_for_each_entry_safe(buf, tmp,
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&dev->meta_out_active, list) {
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list_del(&buf->list);
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vb2_buffer_done(&buf->vb.vb2_buf,
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VB2_BUF_STATE_QUEUED);
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}
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}
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return err;
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}
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/* abort streaming and wait for last buffer */
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static void meta_out_stop_streaming(struct vb2_queue *vq)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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dprintk(dev, 1, "%s\n", __func__);
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vivid_stop_generating_vid_out(dev, &dev->meta_out_streaming);
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}
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static void meta_out_buf_request_complete(struct vb2_buffer *vb)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_meta_out);
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}
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const struct vb2_ops vivid_meta_out_qops = {
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.queue_setup = meta_out_queue_setup,
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.buf_prepare = meta_out_buf_prepare,
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.buf_queue = meta_out_buf_queue,
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.start_streaming = meta_out_start_streaming,
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.stop_streaming = meta_out_stop_streaming,
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.buf_request_complete = meta_out_buf_request_complete,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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int vidioc_enum_fmt_meta_out(struct file *file, void *priv,
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struct v4l2_fmtdesc *f)
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{
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struct vivid_dev *dev = video_drvdata(file);
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if (!vivid_is_webcam(dev))
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return -EINVAL;
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if (f->index > 0)
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return -EINVAL;
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f->type = V4L2_BUF_TYPE_META_OUTPUT;
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f->pixelformat = V4L2_META_FMT_VIVID;
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return 0;
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}
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int vidioc_g_fmt_meta_out(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct vivid_dev *dev = video_drvdata(file);
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struct v4l2_meta_format *meta = &f->fmt.meta;
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if (!vivid_is_webcam(dev) || !dev->has_meta_out)
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return -EINVAL;
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meta->dataformat = V4L2_META_FMT_VIVID;
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meta->buffersize = sizeof(struct vivid_meta_out_buf);
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return 0;
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}
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void vivid_meta_out_process(struct vivid_dev *dev,
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struct vivid_buffer *buf)
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{
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struct vivid_meta_out_buf *meta = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
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v4l2_ctrl_s_ctrl(dev->brightness, meta->brightness);
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v4l2_ctrl_s_ctrl(dev->contrast, meta->contrast);
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v4l2_ctrl_s_ctrl(dev->saturation, meta->saturation);
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v4l2_ctrl_s_ctrl(dev->hue, meta->hue);
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dprintk(dev, 2, " %s brightness %u contrast %u saturation %u hue %d\n",
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__func__, meta->brightness, meta->contrast,
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meta->saturation, meta->hue);
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}
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