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| author |   Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-17 19:43:22 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-17 22:51:14 -0300 |
| commit | 9cbfcd7cf230393d12a587fdad11c60de5c1f7be (patch) | |
| tree | a06ad3de7b42dc0d6a5e3954487fba21f5cdc9ba /Documentation/media | |
| parent | [media] doc-rst: add documentation for saa7134 (diff) | |
| download | linux-dev-9cbfcd7cf230393d12a587fdad11c60de5c1f7be.tar.xz linux-dev-9cbfcd7cf230393d12a587fdad11c60de5c1f7be.zip | |
[media] doc-rst: add sh_mobile_ceu_camera crop documentation
Convert it to ReST and add it to media/v4l-drivers book.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media')
| -rw-r--r-- | Documentation/media/v4l-drivers/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst | 57 |
2 files changed, 30 insertions, 28 deletions
diff --git a/Documentation/media/v4l-drivers/index.rst b/Documentation/media/v4l-drivers/index.rst index f761627d3fa1..64556192f12a 100644 --- a/Documentation/media/v4l-drivers/index.rst +++ b/Documentation/media/v4l-drivers/index.rst @@ -34,4 +34,5 @@ License". pxa_camera radiotrack saa7134 + sh_mobile_ceu_camera zr364xx diff --git a/Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst b/Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst index 1e96ce6e2d2f..e40ffea7708c 100644 --- a/Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst +++ b/Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst @@ -1,5 +1,7 @@ - Cropping and Scaling algorithm, used in the sh_mobile_ceu_camera driver - ======================================================================= +Cropping and Scaling algorithm, used in the sh_mobile_ceu_camera driver +======================================================================= + +Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Terminology ----------- @@ -12,29 +14,31 @@ combined scales: sensor_scale * host_scale Generic scaling / cropping scheme --------------------------------- --1-- -| --2-- -\ -| --\ -| --\ -+-5-- . -- -3-- -\ -| `... -\ -| `... -4-- . - -7.. -| `. -| `. .6-- -| -| . .6'- -| .´ -| ... -4'- .´ -| ...´ - -7'. -+-5'- .´ -/ -| -- -3'- -/ -| --/ -| --/ --2'- -/ -| -| --1'- +.. code-block:: none + + -1-- + | + -2-- -\ + | --\ + | --\ + +-5-- . -- -3-- -\ + | `... -\ + | `... -4-- . - -7.. + | `. + | `. .6-- + | + | . .6'- + | .´ + | ... -4'- .´ + | ...´ - -7'. + +-5'- .´ -/ + | -- -3'- -/ + | --/ + | --/ + -2'- -/ + | + | + -1'- In the above chart minuses and slashes represent "real" data amounts, points and accents represent "useful" data, basically, CEU scaled and cropped output, @@ -134,6 +138,3 @@ Cropping is performed in the following 6 steps: 5. Calculate and apply host scale = (6' - 6) / (4' - 4) 6. Calculate and apply host crop: 6 - 7 = (5 - 2) * (6' - 6) / (5' - 5) - --- -Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> |