/******************************************************************************
*
* cpia2_usb_stream_resume
*
*****************************************************************************/
int cpia2_usb_stream_resume(struct camera_data *cam)
{
int ret = 0;
if(cam->streaming) {
cam->first_image_seen = 0;
ret = set_alternate(cam, cam->params.camera_state.stream_mode);
if(ret == 0) {
ret = submit_urbs(cam);
}
}
return ret;
}
/******************************************************************************
*
* cpia2_usb_stream_resume
*
*****************************************************************************/
int cpia2_usb_stream_resume(struct camera_data *cam)
{
int ret = 0;
if(cam->streaming) {
cam->first_image_seen = 0;
ret = set_alternate(cam, cam->params.camera_state.stream_mode);
if(ret == 0) {
/* for some reason the user effects need to be set
again when starting streaming. */
cpia2_do_command(cam, CPIA2_CMD_SET_USER_EFFECTS, TRANSFER_WRITE,
cam->params.vp_params.user_effects);
ret = submit_urbs(cam);
}
}
return ret;
}
/******************************************************************************
*
* cpia2_usb_stream_start
*
*****************************************************************************/
int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate)
{
int ret;
int old_alt;
if(cam->streaming)
return 0;
if (cam->flush) {
int i;
DBG("Flushing buffers\n");
for(i=0; i<cam->num_frames; ++i) {
cam->buffers[i].status = FRAME_EMPTY;
cam->buffers[i].length = 0;
}
cam->curbuff = &cam->buffers[0];
cam->workbuff = cam->curbuff->next;
cam->flush = false;
}
old_alt = cam->params.camera_state.stream_mode;
cam->params.camera_state.stream_mode = 0;
ret = cpia2_usb_change_streaming_alternate(cam, alternate);
if (ret < 0) {
int ret2;
ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret);
cam->params.camera_state.stream_mode = old_alt;
ret2 = set_alternate(cam, USBIF_CMDONLY);
if (ret2 < 0) {
ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already "
"failed. Then tried to call "
"set_alternate(USBIF_CMDONLY) = %d.\n",
alternate, ret, ret2);
}
} else {
cam->frame_count = 0;
cam->streaming = 1;
ret = cpia2_usb_stream_resume(cam);
}
return ret;
}
