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[media] DocBook/device-drivers: Add drivers/media core stuff

Browse source 
There are lots of docbook marks at the media subsystem, but
those aren't used.

Add the core headers/code in order to start generating docs.

Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Jonathan Corbet <[email protected]>
This commit is contained in:
Mauro Carvalho Chehab 2015-08-21 14:17:13 -03:00
commit dc2c8bd3c9
2 changed files with 36 additions and 4 deletions
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10
drivers/media/dvb-core/dvb_math.h
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@ -30,9 +30,10 @@
* to use rational values you can use the following method:
* intlog2(value) = intlog2(value * 2^x) - x * 2^24
*
* example: intlog2(8) will give 3 << 24 = 3 * 2^24
* example: intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
* example: intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
* Some usecase examples:
* intlog2(8) will give 3 << 24 = 3 * 2^24
* intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
* intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
*
* @param value The value (must be != 0)
* @return log2(value) * 2^24
@ -45,7 +46,8 @@ extern unsigned int intlog2(u32 value);
* to use rational values you can use the following method:
* intlog10(value) = intlog10(value * 10^x) - x * 2^24
*
* example: intlog10(1000) will give 3 << 24 = 3 * 2^24
* An usecase example:
* intlog10(1000) will give 3 << 24 = 3 * 2^24
* due to the implementation intlog10(1000) might be not exactly 3 * 2^24
*
* look at intlog2 for similar examples