How to use ArduCAM with Arduino DUE board

/** Set SCK to max rate of F_CPU/2. See Sd2Card::setSckRate(). */
uint8_t const SPI_FULL_SPEED = 0;
/** Set SCK rate to F_CPU/4. See Sd2Card::setSckRate(). */
uint8_t const SPI_HALF_SPEED = 1;
/** Set SCK rate to F_CPU/8. Sd2Card::setSckRate(). */
uint8_t const SPI_QUARTER_SPEED = 2;
uint8_t const SPI_ARDUCAM_SPEED = 3;

boolean SDClass::begin(uint8_t csPin) {
/*
 
Performs the initialisation required by the sdfatlib library.
 
Return true if initialization succeeds, false otherwise.
 
*/
//return card.init( SPI_FULL_SPEED, csPin) &&
//return card.init(SPI_HALF_SPEED, csPin) &&
//return card.init(SPI_QUARTER_SPEED, csPin) &&
return card.init(SPI_ARDUCAM_SPEED, csPin) &&
volume.init(card) &&
root.openRoot(volume);
}