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- Imagination Technologies SPDIF Input Controllers
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- The Imagination Technologies SPDIF Input controller contains the following
- controls:
- * name='IEC958 Capture Mask',index=0
- This control returns a mask that shows which of the IEC958 status bits
- can be read using the 'IEC958 Capture Default' control.
- * name='IEC958 Capture Default',index=0
- This control returns the status bits contained within the SPDIF stream that
- is being received. The 'IEC958 Capture Mask' shows which bits can be read
- from this control.
- * name='SPDIF In Multi Frequency Acquire',index=0
- * name='SPDIF In Multi Frequency Acquire',index=1
- * name='SPDIF In Multi Frequency Acquire',index=2
- * name='SPDIF In Multi Frequency Acquire',index=3
- This control is used to attempt acquisition of up to four different sample
- rates. The active rate can be obtained by reading the 'SPDIF In Lock Frequency'
- control.
- When the value of this control is set to {0,0,0,0}, the rate given to hw_params
- will determine the single rate the block will capture. Else, the rate given to
- hw_params will be ignored, and the block will attempt capture for each of the
- four sample rates set here.
- If less than four rates are required, the same rate can be specified more than
- once
- * name='SPDIF In Lock Frequency',index=0
- This control returns the active capture rate, or 0 if a lock has not been
- acquired
- * name='SPDIF In Lock TRK',index=0
- This control is used to modify the locking/jitter rejection characteristics
- of the block. Larger values increase the locking range, but reduce jitter
- rejection.
- * name='SPDIF In Lock Acquire Threshold',index=0
- This control is used to change the threshold at which a lock is acquired.
- * name='SPDIF In Lock Release Threshold',index=0
- This control is used to change the threshold at which a lock is released.
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