Commit | Line | Data |
---|---|---|
8f6eec13 DH |
1 | The Imagination Technologies SPDIF Input controller contains the following |
2 | controls: | |
3 | ||
4 | name='IEC958 Capture Mask',index=0 | |
5 | ||
6 | This control returns a mask that shows which of the IEC958 status bits | |
7 | can be read using the 'IEC958 Capture Default' control. | |
8 | ||
9 | name='IEC958 Capture Default',index=0 | |
10 | ||
11 | This control returns the status bits contained within the SPDIF stream that | |
12 | is being received. The 'IEC958 Capture Mask' shows which bits can be read | |
13 | from this control. | |
14 | ||
15 | name='SPDIF In Multi Frequency Acquire',index=0 | |
16 | name='SPDIF In Multi Frequency Acquire',index=1 | |
17 | name='SPDIF In Multi Frequency Acquire',index=2 | |
18 | name='SPDIF In Multi Frequency Acquire',index=3 | |
19 | ||
20 | This control is used to attempt acquisition of up to four different sample | |
21 | rates. The active rate can be obtained by reading the 'SPDIF In Lock Frequency' | |
22 | control. | |
23 | ||
24 | When the value of this control is set to {0,0,0,0}, the rate given to hw_params | |
25 | will determine the single rate the block will capture. Else, the rate given to | |
26 | hw_params will be ignored, and the block will attempt capture for each of the | |
27 | four sample rates set here. | |
28 | ||
29 | If less than four rates are required, the same rate can be specified more than | |
30 | once | |
31 | ||
32 | name='SPDIF In Lock Frequency',index=0 | |
33 | ||
34 | This control returns the active capture rate, or 0 if a lock has not been | |
35 | acquired | |
36 | ||
37 | name='SPDIF In Lock TRK',index=0 | |
38 | ||
39 | This control is used to modify the locking/jitter rejection characteristics | |
40 | of the block. Larger values increase the locking range, but reduce jitter | |
41 | rejection. | |
42 | ||
43 | name='SPDIF In Lock Acquire Threshold',index=0 | |
44 | ||
45 | This control is used to change the threshold at which a lock is acquired. | |
46 | ||
47 | name='SPDIF In Lock Release Threshold',index=0 | |
48 | ||
49 | This control is used to change the threshold at which a lock is released. |