PLAY_MSF, PLAY_TRACK, PLAY_TRACK_REL, PAUSE, PLAY_12 commands to pass through umass(4), in order to make cdcontrol(1) to issue commands to a USB CD driver.
PLAY_MSF, PLAY_TRACK, PLAY_TRACK_REL, PAUSE, PLAY_12 commands to pass
through umass(4), in order to make cdcontrol(1) to issue commands to
a USB CD driver.

The command IDs were obtained from the CAM subsystem.  This was tested
on half dozen of USB CD drivers from different vendors.

Suggested by:	"intron" <intron at intron dot ac>
PR:		usb/83439
Reviewed by:	sanpei
MFC After:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase