unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait)
{
struct cx18_open_id *id = filp->private_data;
struct cx18 *cx = id->cx;
struct cx18_stream *s = &cx->streams[id->type];
int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags);
/* Start a capture if there is none */
if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) {
int rc;
mutex_lock(&cx->serialize_lock);
rc = cx18_start_capture(id);
mutex_unlock(&cx->serialize_lock);
if (rc) {
CX18_DEBUG_INFO("Could not start capture for %s (%d)\n",
s->name, rc);
return POLLERR;
}
CX18_DEBUG_FILE("Encoder poll started capture\n");
}
/* add stream's waitq to the poll list */
CX18_DEBUG_HI_FILE("Encoder poll\n");
poll_wait(filp, &s->waitq, wait);
if (atomic_read(&s->q_full.buffers) || atomic_read(&s->q_io.buffers))
return POLLIN | POLLRDNORM;
if (eof)
return POLLHUP;
return 0;
}
static int cx18_encoder_cmd(struct file *file, void *fh,
struct v4l2_encoder_cmd *enc)
{
struct cx18_open_id *id = fh;
struct cx18 *cx = id->cx;
u32 h;
switch (enc->cmd) {
case V4L2_ENC_CMD_START:
CX18_DEBUG_IOCTL("V4L2_ENC_CMD_START\n");
enc->flags = 0;
return cx18_start_capture(id);
case V4L2_ENC_CMD_STOP:
CX18_DEBUG_IOCTL("V4L2_ENC_CMD_STOP\n");
enc->flags &= V4L2_ENC_CMD_STOP_AT_GOP_END;
cx18_stop_capture(id,
enc->flags & V4L2_ENC_CMD_STOP_AT_GOP_END);
break;
case V4L2_ENC_CMD_PAUSE:
CX18_DEBUG_IOCTL("V4L2_ENC_CMD_PAUSE\n");
enc->flags = 0;
if (!atomic_read(&cx->ana_capturing))
return -EPERM;
if (test_and_set_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags))
return 0;
h = cx18_find_handle(cx);
if (h == CX18_INVALID_TASK_HANDLE) {
CX18_ERR("Can't find valid task handle for "
"V4L2_ENC_CMD_PAUSE\n");
return -EBADFD;
}
cx18_mute(cx);
cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, h);
break;
case V4L2_ENC_CMD_RESUME:
CX18_DEBUG_IOCTL("V4L2_ENC_CMD_RESUME\n");
enc->flags = 0;
if (!atomic_read(&cx->ana_capturing))
return -EPERM;
if (!test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags))
return 0;
h = cx18_find_handle(cx);
if (h == CX18_INVALID_TASK_HANDLE) {
CX18_ERR("Can't find valid task handle for "
"V4L2_ENC_CMD_RESUME\n");
return -EBADFD;
}
cx18_vapi(cx, CX18_CPU_CAPTURE_RESUME, 1, h);
cx18_unmute(cx);
break;
default:
CX18_DEBUG_IOCTL("Unknown cmd %d\n", enc->cmd);
return -EINVAL;
}
return 0;
}
ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count,
loff_t *pos)
{
struct cx18_open_id *id = filp->private_data;
struct cx18 *cx = id->cx;
struct cx18_stream *s = &cx->streams[id->type];
int rc;
CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name);
mutex_lock(&cx->serialize_lock);
rc = cx18_start_capture(id);
mutex_unlock(&cx->serialize_lock);
if (rc)
return rc;
return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
}
