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Merge branch 'topic/docs-next' into v4l_for_linus
[sfrench/cifs-2.6.git]
/
drivers
/
media
/
dvb-core
/
dvb_math.h
diff --git
a/drivers/media/dvb-core/dvb_math.h
b/drivers/media/dvb-core/dvb_math.h
index 34dc1df03cabb20db49b1b324fd5d0a2c53cb1f9..2f0326674ca671674268ff3a75404fd915fadf8b 100644
(file)
--- a/
drivers/media/dvb-core/dvb_math.h
+++ b/
drivers/media/dvb-core/dvb_math.h
@@
-30,11
+30,15
@@
* @value: The value (must be != 0)
*
* to use rational values you can use the following method:
* @value: The value (must be != 0)
*
* to use rational values you can use the following method:
+ *
* intlog2(value) = intlog2(value * 2^x) - x * 2^24
*
* Some usecase examples:
* intlog2(value) = intlog2(value * 2^x) - x * 2^24
*
* Some usecase examples:
+ *
* intlog2(8) will give 3 << 24 = 3 * 2^24
* intlog2(8) will give 3 << 24 = 3 * 2^24
+ *
* intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
* intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
+ *
* intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
*
*
* intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
*
*
@@
-48,10
+52,13
@@
extern unsigned int intlog2(u32 value);
* @value: The value (must be != 0)
*
* to use rational values you can use the following method:
* @value: The value (must be != 0)
*
* to use rational values you can use the following method:
+ *
* intlog10(value) = intlog10(value * 10^x) - x * 2^24
*
* An usecase example:
* intlog10(value) = intlog10(value * 10^x) - x * 2^24
*
* An usecase example:
+ *
* intlog10(1000) will give 3 << 24 = 3 * 2^24
* 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
* due to the implementation intlog10(1000) might be not exactly 3 * 2^24
*
* look at intlog2 for similar examples