dvb_dev_set_bufsize

@brief Start a demux or dvr buffer size @ingroup dvb_device

@param open_dev Points to the struct dvb_open_descriptor @param buffersize Size of the buffer to be allocated to store the filtered data.

This is a wrapper function for DMX_SET_BUFFER_SIZE ioctl.

See http://linuxtv.org/downloads/v4l-dvb-apis/dvb_demux.html for more details.

@return Retuns zero on success, -1 otherwise.

@note valid only for DVB_DEVICE_DEMUX or DVB_DEVICE_DVR.