// SPDX-License-Identifier: GPL-2.0-only
/*
* vivid-vbi-out.c - vbi output support functions.
*
* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include "vivid-core.h"
#include "vivid-kthread-out.h"
#include "vivid-vbi-out.h"
#include "vivid-vbi-cap.h"
static int vbi_out_queue_setup(struct vb2_queue *vq,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], struct device *alloc_devs[])
{
struct vivid_dev *dev = vb2_get_drv_priv(vq);
bool is_60hz = dev->std_out & V4L2_STD_525_60;
unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
36 * sizeof(struct v4l2_sliced_vbi_data) :
1440 * 2 * (is_60hz ? 12 : 18);
if (!vivid_is_svid_out(dev))
return -EINVAL;
if (*nplanes)
return sizes[0] < size ? -EINVAL : 0;
sizes[0] = size;
*nplanes = 1;
return 0;
}
static int vbi_out_buf_prepare(struct vb2_buffer *vb)
{
struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
bool is_60hz = dev->std_out & V4L2_STD_525_60;
unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
36 * sizeof(struct v4l2_sliced_vbi_data) :
1440 * 2 * (is_60hz ? 12 : 18);
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 vbi_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->vbi_out_active);
spin_unlock(&dev->slock);
}
static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
{
struct vivid_dev *dev = vb2_get_drv_priv(vq);
int err;
dprintk(dev, 1, "%s\n", __func__);
dev->vbi_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->vbi_out_streaming);
}
if (err) {
struct vivid_buffer *buf, *tmp;
list_for_each_entry_safe(buf, tmp, &dev->vbi_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 vbi_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->vbi_out_streaming);
dev->vbi_out_have_wss = false;
dev->vbi_out_have_cc[0] = false;
dev->vbi_out_have_cc[1] = false;
}
static void vbi_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_vbi_out);
}
const struct vb2_ops vivid_vbi_out_qops = {
.queue_setup = vbi_out_queue_setup,
.buf_prepare = vbi_out_buf_prepare,
.buf_queue = vbi_out_buf_queue,
.start_streaming = vbi_out_start_streaming,
.stop_streaming = vbi_out_stop_streaming,
.buf_request_complete = vbi_out_buf_request_complete,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct vivid_dev *dev = video_drvdata(file);
struct v4l2_vbi_format *vbi = &f->fmt.vbi;
bool is_60hz = dev->std_out & V4L2_STD_525_60;
if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
return -EINVAL;
vbi->sampling_rate = 25000000;
vbi->offset = 24;
vbi->samples_per_line = 1440;
vbi->sample_format = V4L2_PIX_FMT_GREY;
vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
vbi->reserved[0] = 0;
vbi->reserved[1] = 0;
return 0;
}
int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct vivid_dev *dev = video_drvdata(file);
int ret = vidioc_g_fmt_vbi_out(file, priv, f);
if (ret)
return ret;
if (vb2_is_busy(&dev->vb_vbi_out_q))
return -EBUSY;
dev->stream_sliced_vbi_out = false;
dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
return 0;
}
int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct vivid_dev *dev = video_drvdata(file);
struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
return -EINVAL;
vivid_fill_service_lines(vbi, dev->service_set_out);
return 0;
}
int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct vivid_dev *dev = video_drvdata(file);
struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
bool is_60hz = dev->std_out & V4L2_STD_525_60;
u32 service_set = vbi->service_set;
if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
return -EINVAL;
service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
vivid_fill_service_lines(vbi, service_set);
return 0;
}
int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,
struct v4l2_format *fmt)
{
struct vivid_dev *dev = video_drvdata(file);
struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
if (ret)
return ret;
if (vb2_is_busy(&dev->vb_vbi_out_q))
return -EBUSY;
dev->service_set_out = vbi->service_set;
dev->stream_sliced_vbi_out = true;
dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
return 0;
}
void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
struct vivid_buffer *buf)
{
struct v4l2_sliced_vbi_data *vbi =
vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
unsigned elems =
vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);
dev->vbi_out_have_cc[0] = false;
dev->vbi_out_have_cc[1] = false;
dev->vbi_out_have_wss = false;
while (elems--) {
switch (vbi->id) {
case V4L2_SLICED_CAPTION_525:
if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
dev->vbi_out_have_cc[!!vbi->field] = true;
dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
}
break;
case V4L2_SLICED_WSS_625:
if ((dev->std_out & V4L2_STD_625_50) &&
vbi->field == 0 && vbi->line == 23) {
dev->vbi_out_have_wss = true;
dev->vbi_out_wss[0] = vbi->data[0];
dev->vbi_out_wss[1] = vbi->data[1];
}
break;
}
vbi++;
}
}
Codebase Browser
linux