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V4L/DVB (4981): Update cx2341x documentation.

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Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil
2006-12-18 13:06:30 -03:00
committed by Mauro Carvalho Chehab
parent 8387c66c7f
commit e12ceaf496
2 changed files with 15 additions and 1 deletions
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14
Documentation/video4linux/cx2341x/fw-decoder-api.txt
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@@ -32,6 +32,10 @@ Description
playback stops at specified PTS. playback stops at specified PTS.
Param[0] Param[0]
Display 0=last frame, 1=black Display 0=last frame, 1=black
Note: this takes effect immediately, so if you want to wait for a PTS,
then use '0', otherwise the screen goes to black at once.
You can call this later (even if there is no playback) with a 1 value
to set the screen to black.
Param[1] Param[1]
PTS low PTS low
Param[2] Param[2]
@@ -60,8 +64,12 @@ Param[0]
31 Speed: 31 Speed:
'0' slow '0' slow
'1' fast '1' fast
Note: n seems to be limited to 2. Anything higher does not result in
faster playback. Instead the host should start dropping frames.
Param[1] Param[1]
Direction: 0=forward, 1=reverse Direction: 0=forward, 1=reverse
Note: to make reverse playback work you have to write full GOPs in
reverse order.
Param[2] Param[2]
Picture mask: Picture mask:
1=I frames 1=I frames
@@ -69,6 +77,8 @@ Param[2]
7=I, P, B frames 7=I, P, B frames
Param[3] Param[3]
B frames per GOP (for reverse play only) B frames per GOP (for reverse play only)
Note: apparently this does not work. For reverse play I can only make it
work by selecting I or I and P frames in the Picture mask.
Param[4] Param[4]
Mute audio: 0=disable, 1=enable Mute audio: 0=disable, 1=enable
Param[5] Param[5]
@@ -212,6 +222,7 @@ Description
Select audio mode Select audio mode
Param[0] Param[0]
Dual mono mode action Dual mono mode action
0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged
Param[1] Param[1]
Stereo mode action: Stereo mode action:
0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged 0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged
@@ -225,6 +236,9 @@ Description
Counterpart to API 0xD5 Counterpart to API 0xD5
Param[0] Param[0]
Event: 0=Audio mode change between stereo and dual channel Event: 0=Audio mode change between stereo and dual channel
Event: 3=Decoder started
Event: 4=Unknown: goes off 10-15 times per second while decoding.
Event: 5=Some sync event: goes off once per frame.
Param[1] Param[1]
Notification 0=disabled, 1=enabled Notification 0=disabled, 1=enabled
Param[2] Param[2]

2
Documentation/video4linux/cx2341x/fw-memory.txt
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@@ -125,7 +125,7 @@ Bit
27 Encoder DMA complete 27 Encoder DMA complete
26 26
25 Decoder copy protect detection event 25 Decoder copy protect detection event
24 Decoder audio mode change detection event 24 Decoder audio mode change detection event (through event notification)
23 23
22 Decoder data request 22 Decoder data request
21 Decoder I-Frame? done 21 Decoder I-Frame? done