Small cleanups

include/cdio/mmc_cmds.h

@@ -194,6 +194,31 @@ extern "C" {
                 uint8_t subchannel_selection, uint16_t i_blocksize, 
                 uint32_t i_blocks );
   
+  /**
+    Set the drive speed in K bytes per second using SCSI-MMC SET SPEED.
+.
+
+    @param p_cdio        CD structure set by cdio_open().
+    @param i_Kbs_speed   speed in K bytes per second. Note this is 
+                         not in standard CD-ROM speed units, e.g.
+                         1x, 4x, 16x as it is in cdio_set_speed.
+                         To convert CD-ROM speed units to Kbs,
+                         multiply the number by 176 (for raw data)
+                         and by 150 (for filesystem data). 
+                         Also note that ATAPI specs say that a value
+                         less than 176 will result in an error.
+                         On many CD-ROM drives,
+                         specifying a value too large will result in using
+                         the fastest speed.
+
+    @return the drive speed if greater than 0. -1 if we had an error. is -2
+    returned if this is not implemented for the current driver.
+
+    @see cdio_set_speed and mmc_set_drive_speed
+  */
+  driver_return_code_t mmc_set_speed( const CdIo_t *p_cdio, 
+                                      int i_Kbs_speed );
+  
   /**
     Load or Unload media using a MMC START STOP UNIT command.