Commit e12ceaf4 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (4981): Update cx2341x documentation. 



Signed-off-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 8387c66c

Documentation/video4linux/cx2341x/fw-decoder-api.txt

+14 −0
Original line number Diff line number Diff line
@@ -32,6 +32,10 @@ Description 
	playback stops at specified PTS.

Param[0]

	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]

	PTS low

Param[2]
@@ -60,8 +64,12 @@ Param[0] 
	    31   Speed:

		     '0' slow

		     '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]

	Direction: 0=forward, 1=reverse

	Note: to make reverse playback work you have to write full GOPs in

	reverse order.

Param[2]

	Picture mask:

	    1=I frames
@@ -69,6 +77,8 @@ 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.

Param[4]

	Mute audio: 0=disable, 1=enable

Param[5]
@@ -212,6 +222,7 @@ Description 
	Select audio mode

Param[0]

	Dual mono mode action

	    0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged

Param[1]

	Stereo mode action:

	    0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged
@@ -225,6 +236,9 @@ Description 
	Counterpart to API 0xD5

Param[0]

	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]

	Notification 0=disabled, 1=enabled

Param[2]

Documentation/video4linux/cx2341x/fw-memory.txt

+1 −1
Original line number Diff line number Diff line
@@ -125,7 +125,7 @@ Bit 
27 Encoder DMA complete

26

25 Decoder copy protect detection event

24 Decoder audio mode change detection event

24 Decoder audio mode change detection event (through event notification)

23

22 Decoder data request

21 Decoder I-Frame? done