diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2006-12-20 06:50:18 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-02-21 13:34:14 -0200 |
| commit | d84e2bdca6e168557639b29c9244cbcf2500fe21 (patch) | |
| tree | 99114140c76dc665b8abd9791308062efe03fadc /Documentation/video4linux | |
| parent | 75558ab92dc95c3b5a99df7c77e95a6e8484e05c (diff) | |
V4L/DVB (4987): Improve cx2341x documentation
Document the program index table format, removed unused interrupt documentation
and improve the documentation regarding the audio mode (stereo/joint/dual/mono).
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'Documentation/video4linux')
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-decoder-api.txt | 2 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-encoder-api.txt | 24 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-memory.txt | 4 |
3 files changed, 21 insertions, 9 deletions
diff --git a/Documentation/video4linux/cx2341x/fw-decoder-api.txt b/Documentation/video4linux/cx2341x/fw-decoder-api.txt index 1345d267c5f..8c317b7a4fc 100644 --- a/Documentation/video4linux/cx2341x/fw-decoder-api.txt +++ b/Documentation/video4linux/cx2341x/fw-decoder-api.txt @@ -236,7 +236,7 @@ Description Setup firmware to notify the host about a particular event. Counterpart to API 0xD5 Param[0] - Event: 0=Audio mode change between stereo and dual channel + Event: 0=Audio mode change between mono, (joint) 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. diff --git a/Documentation/video4linux/cx2341x/fw-encoder-api.txt b/Documentation/video4linux/cx2341x/fw-encoder-api.txt index 2412718c3d0..fe02bdb8459 100644 --- a/Documentation/video4linux/cx2341x/fw-encoder-api.txt +++ b/Documentation/video4linux/cx2341x/fw-encoder-api.txt @@ -322,9 +322,7 @@ Param[0] '01'=JointStereo '10'=Dual '11'=Mono - Note: testing seems to indicate that Mono and possibly - JointStereo are not working (default to stereo). - Dual does work, though. + Note: the cx23415 cannot decode Joint Stereo properly. 10:11 Mode Extension used in joint_stereo mode. In Layer I and II they indicate which subbands are in @@ -403,16 +401,34 @@ Name CX2341X_ENC_SET_PGM_INDEX_INFO Enum 199/0xC7 Description Sets the Program Index Information. + The information is stored as follows: + + struct info { + u32 length; // Length of this frame + u32 offset_low; // Offset in the file of the + u32 offset_high; // start of this frame + u32 mask1; // Bits 0-1 are the type mask: + // 1=I, 2=P, 4=B + u32 pts; // The PTS of the frame + u32 mask2; // Bit 0 is bit 32 of the pts. + }; + u32 table_ptr; + struct info index[400]; + + The table_ptr is the encoder memory address in the table were + *new* entries will be written. Note that this is a ringbuffer, + so the table_ptr will wraparound. Param[0] Picture Mask: 0=No index capture 1=I frames 3=I,P frames 7=I,P,B frames + (Seems to be ignored, it always indexes I, P and B frames) Param[1] Elements requested (up to 400) Result[0] - Offset in SDF memory of the table. + Offset in the encoder memory of the start of the table. Result[1] Number of allocated elements up to a maximum of Param[1] diff --git a/Documentation/video4linux/cx2341x/fw-memory.txt b/Documentation/video4linux/cx2341x/fw-memory.txt index 0cf24918c9f..d445e457fc1 100644 --- a/Documentation/video4linux/cx2341x/fw-memory.txt +++ b/Documentation/video4linux/cx2341x/fw-memory.txt @@ -123,12 +123,8 @@ Bit 29 Encoder VBI capture 28 Encoder Video Input Module reset event 27 Encoder DMA complete -26 -25 Decoder copy protect detection event 24 Decoder audio mode change detection event (through event notification) -23 22 Decoder data request -21 Decoder I-Frame? done 20 Decoder DMA complete 19 Decoder VBI re-insertion 18 Decoder DMA err (linked-list bad) |