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authorHans Verkuil <hverkuil@xs4all.nl>2006-12-20 04:50:18 -0500
committerMauro Carvalho Chehab <mchehab@infradead.org>2007-02-21 10:34:14 -0500
commitd84e2bdca6e168557639b29c9244cbcf2500fe21 (patch)
tree99114140c76dc665b8abd9791308062efe03fadc /Documentation
parent75558ab92dc95c3b5a99df7c77e95a6e8484e05c (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')
-rw-r--r--Documentation/video4linux/cx2341x/fw-decoder-api.txt2
-rw-r--r--Documentation/video4linux/cx2341x/fw-encoder-api.txt24
-rw-r--r--Documentation/video4linux/cx2341x/fw-memory.txt4
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 1345d267c5fc..8c317b7a4fc9 100644
--- a/Documentation/video4linux/cx2341x/fw-decoder-api.txt
+++ b/Documentation/video4linux/cx2341x/fw-decoder-api.txt
@@ -236,7 +236,7 @@ Description
236 Setup firmware to notify the host about a particular event. 236 Setup firmware to notify the host about a particular event.
237 Counterpart to API 0xD5 237 Counterpart to API 0xD5
238Param[0] 238Param[0]
239 Event: 0=Audio mode change between stereo and dual channel 239 Event: 0=Audio mode change between mono, (joint) stereo and dual channel.
240 Event: 3=Decoder started 240 Event: 3=Decoder started
241 Event: 4=Unknown: goes off 10-15 times per second while decoding. 241 Event: 4=Unknown: goes off 10-15 times per second while decoding.
242 Event: 5=Some sync event: goes off once per frame. 242 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 2412718c3d0b..fe02bdb84598 100644
--- a/Documentation/video4linux/cx2341x/fw-encoder-api.txt
+++ b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
@@ -322,9 +322,7 @@ Param[0]
322 '01'=JointStereo 322 '01'=JointStereo
323 '10'=Dual 323 '10'=Dual
324 '11'=Mono 324 '11'=Mono
325 Note: testing seems to indicate that Mono and possibly 325 Note: the cx23415 cannot decode Joint Stereo properly.
326 JointStereo are not working (default to stereo).
327 Dual does work, though.
328 326
329 10:11 Mode Extension used in joint_stereo mode. 327 10:11 Mode Extension used in joint_stereo mode.
330 In Layer I and II they indicate which subbands are in 328 In Layer I and II they indicate which subbands are in
@@ -403,16 +401,34 @@ Name CX2341X_ENC_SET_PGM_INDEX_INFO
403Enum 199/0xC7 401Enum 199/0xC7
404Description 402Description
405 Sets the Program Index Information. 403 Sets the Program Index Information.
404 The information is stored as follows:
405
406 struct info {
407 u32 length; // Length of this frame
408 u32 offset_low; // Offset in the file of the
409 u32 offset_high; // start of this frame
410 u32 mask1; // Bits 0-1 are the type mask:
411 // 1=I, 2=P, 4=B
412 u32 pts; // The PTS of the frame
413 u32 mask2; // Bit 0 is bit 32 of the pts.
414 };
415 u32 table_ptr;
416 struct info index[400];
417
418 The table_ptr is the encoder memory address in the table were
419 *new* entries will be written. Note that this is a ringbuffer,
420 so the table_ptr will wraparound.
406Param[0] 421Param[0]
407 Picture Mask: 422 Picture Mask:
408 0=No index capture 423 0=No index capture
409 1=I frames 424 1=I frames
410 3=I,P frames 425 3=I,P frames
411 7=I,P,B frames 426 7=I,P,B frames
427 (Seems to be ignored, it always indexes I, P and B frames)
412Param[1] 428Param[1]
413 Elements requested (up to 400) 429 Elements requested (up to 400)
414Result[0] 430Result[0]
415 Offset in SDF memory of the table. 431 Offset in the encoder memory of the start of the table.
416Result[1] 432Result[1]
417 Number of allocated elements up to a maximum of Param[1] 433 Number of allocated elements up to a maximum of Param[1]
418 434
diff --git a/Documentation/video4linux/cx2341x/fw-memory.txt b/Documentation/video4linux/cx2341x/fw-memory.txt
index 0cf24918c9fc..d445e457fc1b 100644
--- a/Documentation/video4linux/cx2341x/fw-memory.txt
+++ b/Documentation/video4linux/cx2341x/fw-memory.txt
@@ -123,12 +123,8 @@ Bit
12329 Encoder VBI capture 12329 Encoder VBI capture
12428 Encoder Video Input Module reset event 12428 Encoder Video Input Module reset event
12527 Encoder DMA complete 12527 Encoder DMA complete
12626
12725 Decoder copy protect detection event
12824 Decoder audio mode change detection event (through event notification) 12624 Decoder audio mode change detection event (through event notification)
12923
13022 Decoder data request 12722 Decoder data request
13121 Decoder I-Frame? done
13220 Decoder DMA complete 12820 Decoder DMA complete
13319 Decoder VBI re-insertion 12919 Decoder VBI re-insertion
13418 Decoder DMA err (linked-list bad) 13018 Decoder DMA err (linked-list bad)