1*f336c3f0STakashi Iwai================================================ 2*f336c3f0STakashi IwaiImagination Technologies SPDIF Input Controllers 3*f336c3f0STakashi Iwai================================================ 4*f336c3f0STakashi Iwai 5*f336c3f0STakashi IwaiThe Imagination Technologies SPDIF Input controller contains the following 6*f336c3f0STakashi Iwaicontrols: 7*f336c3f0STakashi Iwai 8*f336c3f0STakashi Iwai* name='IEC958 Capture Mask',index=0 9*f336c3f0STakashi Iwai 10*f336c3f0STakashi IwaiThis control returns a mask that shows which of the IEC958 status bits 11*f336c3f0STakashi Iwaican be read using the 'IEC958 Capture Default' control. 12*f336c3f0STakashi Iwai 13*f336c3f0STakashi Iwai* name='IEC958 Capture Default',index=0 14*f336c3f0STakashi Iwai 15*f336c3f0STakashi IwaiThis control returns the status bits contained within the SPDIF stream that 16*f336c3f0STakashi Iwaiis being received. The 'IEC958 Capture Mask' shows which bits can be read 17*f336c3f0STakashi Iwaifrom this control. 18*f336c3f0STakashi Iwai 19*f336c3f0STakashi Iwai* name='SPDIF In Multi Frequency Acquire',index=0 20*f336c3f0STakashi Iwai* name='SPDIF In Multi Frequency Acquire',index=1 21*f336c3f0STakashi Iwai* name='SPDIF In Multi Frequency Acquire',index=2 22*f336c3f0STakashi Iwai* name='SPDIF In Multi Frequency Acquire',index=3 23*f336c3f0STakashi Iwai 24*f336c3f0STakashi IwaiThis control is used to attempt acquisition of up to four different sample 25*f336c3f0STakashi Iwairates. The active rate can be obtained by reading the 'SPDIF In Lock Frequency' 26*f336c3f0STakashi Iwaicontrol. 27*f336c3f0STakashi Iwai 28*f336c3f0STakashi IwaiWhen the value of this control is set to {0,0,0,0}, the rate given to hw_params 29*f336c3f0STakashi Iwaiwill determine the single rate the block will capture. Else, the rate given to 30*f336c3f0STakashi Iwaihw_params will be ignored, and the block will attempt capture for each of the 31*f336c3f0STakashi Iwaifour sample rates set here. 32*f336c3f0STakashi Iwai 33*f336c3f0STakashi IwaiIf less than four rates are required, the same rate can be specified more than 34*f336c3f0STakashi Iwaionce 35*f336c3f0STakashi Iwai 36*f336c3f0STakashi Iwai* name='SPDIF In Lock Frequency',index=0 37*f336c3f0STakashi Iwai 38*f336c3f0STakashi IwaiThis control returns the active capture rate, or 0 if a lock has not been 39*f336c3f0STakashi Iwaiacquired 40*f336c3f0STakashi Iwai 41*f336c3f0STakashi Iwai* name='SPDIF In Lock TRK',index=0 42*f336c3f0STakashi Iwai 43*f336c3f0STakashi IwaiThis control is used to modify the locking/jitter rejection characteristics 44*f336c3f0STakashi Iwaiof the block. Larger values increase the locking range, but reduce jitter 45*f336c3f0STakashi Iwairejection. 46*f336c3f0STakashi Iwai 47*f336c3f0STakashi Iwai* name='SPDIF In Lock Acquire Threshold',index=0 48*f336c3f0STakashi Iwai 49*f336c3f0STakashi IwaiThis control is used to change the threshold at which a lock is acquired. 50*f336c3f0STakashi Iwai 51*f336c3f0STakashi Iwai* name='SPDIF In Lock Release Threshold',index=0 52*f336c3f0STakashi Iwai 53*f336c3f0STakashi IwaiThis control is used to change the threshold at which a lock is released. 54