diff options
author | Andy Walls <awalls@radix.net> | 2009-02-28 18:13:50 -0500 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 11:43:09 -0400 |
commit | af7c58b1f5014bea181ef74d724ac960923dd403 (patch) | |
tree | 9458933e440c8b777cd4f5b2cce0cdf00f7dcaac /drivers/media/video/cx18/cx18-av-core.h | |
parent | 583803d135b14d414e77b6d2b546a811cac9944e (diff) |
V4L/DVB (10854): cx18: Correct comments about vertical and horizontal blanking timings
This change only affects comments.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx18/cx18-av-core.h')
-rw-r--r-- | drivers/media/video/cx18/cx18-av-core.h | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/media/video/cx18/cx18-av-core.h b/drivers/media/video/cx18/cx18-av-core.h index fd0df4151211..2687a2c91ddd 100644 --- a/drivers/media/video/cx18/cx18-av-core.h +++ b/drivers/media/video/cx18/cx18-av-core.h | |||
@@ -89,16 +89,21 @@ struct cx18_av_state { | |||
89 | 89 | ||
90 | /* | 90 | /* |
91 | * The VBI slicer starts operating and counting lines, begining at | 91 | * The VBI slicer starts operating and counting lines, begining at |
92 | * slicer line count of 1, at D lines after the deassertion of VRESET | 92 | * slicer line count of 1, at D lines after the deassertion of VRESET. |
93 | * This staring field line, S, is 6 or 10 for 625 or 525 line systems. | 93 | * This staring field line, S, is 6 (& 319) or 10 (& 273) for 625 or 525 |
94 | * Sliced ancillary data captured on VBI slicer line M is sent at the | 94 | * line systems respectively. Sliced ancillary data captured on VBI |
95 | * beginning of the next VBI slicer line, VBI slicer line count N = M+1. | 95 | * slicer line M is inserted after the VBI slicer is done with line M, |
96 | * Thus when the VBI slicer reports a VBI slicer line number with | 96 | * when VBI slicer line count is N = M+1. Thus when the VBI slicer |
97 | * ancillary data, the IDID0 byte indicates VBI slicer line N. | 97 | * reports a VBI slicer line number with ancillary data, the IDID0 byte |
98 | * The actual field line that the captured data comes from is | 98 | * indicates VBI slicer line N. The actual field line that the captured |
99 | * data comes from is | ||
100 | * | ||
99 | * L = M+(S+D-1) = N-1+(S+D-1) = N + (S+D-2). | 101 | * L = M+(S+D-1) = N-1+(S+D-1) = N + (S+D-2). |
100 | * | 102 | * |
103 | * L is the line in the field, not frame, from which the VBI data came. | ||
104 | * N is the line reported by the slicer in the ancillary data. | ||
101 | * D is the slicer_line_delay value programmed into register 0x47f. | 105 | * D is the slicer_line_delay value programmed into register 0x47f. |
106 | * S is 6 for 625 line systems or 10 for 525 line systems | ||
102 | * (S+D-2) is the slicer_line_offset used to convert slicer reported | 107 | * (S+D-2) is the slicer_line_offset used to convert slicer reported |
103 | * line counts to actual field lines. | 108 | * line counts to actual field lines. |
104 | */ | 109 | */ |