static ssize_t
ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
{
struct saa7134_dev *dev = file->private_data;
if (!dev->empress_started)
ts_init_encoder(dev);
return videobuf_read_stream(&dev->empress_tsq,
data, count, ppos, 0,
file->f_flags & O_NONBLOCK);
}
static void empress_signal_update(struct work_struct *work)
{
struct saa7134_dev* dev =
container_of(work, struct saa7134_dev, empress_workqueue);
if (dev->nosignal) {
dprintk("no video signal\n");
ts_reset_encoder(dev);
} else {
dprintk("video signal acquired\n");
if (dev->empress_users)
ts_init_encoder(dev);
}
}
static int empress_s_ext_ctrls(struct file *file, void *priv,
struct v4l2_ext_controls *ctrls)
{
struct saa7134_dev *dev = file->private_data;
int err;
/* count == 0 is abused in saa6752hs.c, so that special
case is handled here explicitly. */
if (ctrls->count == 0)
return 0;
if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
return -EINVAL;
err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
ts_init_encoder(dev);
return err;
}
static int empress_s_ext_ctrls(struct file *file, void *priv,
struct v4l2_ext_controls *ctrls)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
/* count == 0 is abused in saa6752hs.c, so that special
case is handled here explicitly. */
if (ctrls->count == 0)
return 0;
if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
return -EINVAL;
saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
ts_init_encoder(dev);
return 0;
}