Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=20a919f7960df1c0bf1cb4f637149ed4b6bc9ec3
Commit: 20a919f7960df1c0bf1cb4f637149ed4b6bc9ec3
Parent: e12ceaf4962d804320d639faed1da61e2cb85723
Author: Hans Verkuil <[EMAIL PROTECTED]>
AuthorDate: Mon Dec 18 22:43:36 2006 -0300
Committer: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
CommitDate: Wed Feb 21 13:34:13 2007 -0200
V4L/DVB (4985): Update cx2341x documentation.
Removed a few unimplemented commands. Added a note for a few fields that are
not implemented in the firmware, and clarified several issues around reverse
playback.
Signed-off-by: Hans Verkuil <[EMAIL PROTECTED]>
Signed-off-by: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
---
.../video4linux/cx2341x/fw-decoder-api.txt | 48 +++-----------------
.../video4linux/cx2341x/fw-encoder-api.txt | 2 +-
2 files changed, 7 insertions(+), 43 deletions(-)
diff --git a/Documentation/video4linux/cx2341x/fw-decoder-api.txt
b/Documentation/video4linux/cx2341x/fw-decoder-api.txt
index 15c388b..1345d26 100644
--- a/Documentation/video4linux/cx2341x/fw-decoder-api.txt
+++ b/Documentation/video4linux/cx2341x/fw-decoder-api.txt
@@ -21,7 +21,7 @@ Param[0]
0 based frame number in GOP to begin playback from.
Param[1]
Specifies the number of muted audio frames to play before normal
- audio resumes.
+ audio resumes. (This is not implemented in the firmware, leave at 0)
-------------------------------------------------------------------------------
@@ -64,7 +64,7 @@ Param[0]
31 Speed:
'0' slow
'1' fast
- Note: n seems to be limited to 2. Anything higher does not result in
+ Note: n is limited to 2. Anything higher does not result in
faster playback. Instead the host should start dropping frames.
Param[1]
Direction: 0=forward, 1=reverse
@@ -77,15 +77,16 @@ Param[2]
7=I, P, B frames
Param[3]
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.
+ Note: for reverse playback the Picture Mask should be set to I or I, P.
+ Adding B frames to the mask will result in corrupt video. This field
+ has to be set to the correct value in order to keep the timing correct.
Param[4]
Mute audio: 0=disable, 1=enable
Param[5]
Display 0=frame, 1=field
Param[6]
Specifies the number of muted audio frames to play before normal audio
- resumes.
+ resumes. (Not implemented in the firmware, leave at 0)
-------------------------------------------------------------------------------
@@ -287,43 +288,6 @@ Param[3]
-------------------------------------------------------------------------------
-Name CX2341X_DEC_SET_AUDIO_OUTPUT
-Enum 27/0x1B
-Description
- Select audio output format
-Param[0]
- Bitmask:
- 0:1 Data size:
- '00' 16 bit
- '01' 20 bit
- '10' 24 bit
- 2:7 Unused
- 8:9 Mode:
- '00' 2 channels
- '01' 4 channels
- '10' 6 channels
- '11' 6 channels with one line data mode
- (for left justified MSB first mode, 20 bit only)
- 10:11 Unused
- 12:13 Channel format:
- '00' right justified MSB first mode
- '01' left justified MSB first mode
- '10' I2S mode
- 14:15 Unused
- 16:21 Right justify bit count
- 22:31 Unused
-
--------------------------------------------------------------------------------
-
-Name CX2341X_DEC_SET_AV_DELAY
-Enum 28/0x1C
-Description
- Set audio/video delay in 90Khz ticks
-Param[0]
- 0=A/V in sync, negative=audio lags, positive=video lags
-
--------------------------------------------------------------------------------
-
Name CX2341X_DEC_SET_PREBUFFERING
Enum 30/0x1E
Description
diff --git a/Documentation/video4linux/cx2341x/fw-encoder-api.txt
b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
index 15df0df..9a57106 100644
--- a/Documentation/video4linux/cx2341x/fw-encoder-api.txt
+++ b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
@@ -216,7 +216,7 @@ Param[1]
Name CX2341X_ENC_SET_3_2_PULLDOWN
Enum 177/0xB1
Description
- 3:2 pulldown properties
+ 3:2 pulldown properties (This command is not implemented in the
firmware)
Param[0]
0=enabled
1=disabled
-
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