[pulseaudio-discuss] [PATCH 18/23] core: Refactor code to multiply s16 by volume

[Tanu Kaskinen]

On Wed, 2013-02-13 at 17:27 +0100, Peter Meerwald wrote:
> move code to function pa_mult_s16_volume() in sample-util.h
> use 64 bit integers on 64 bit platforms (it's faster)
> 
> on i5, 2.5GHz (64-bit)
> 
> Running suite(s): Mult-s16
> 32 bit mult: 1272300 usec (avg: 12723, min = 12533, max = 18749, stddev = 620.48).
> 64 bit mult: 852241 usec (avg: 8522.41, min = 8420, max = 9148, stddev = 109.388).
> 100%: Checks: 1, Failures: 0, Errors: 0
> 
> on Pentium D, 3.4GHz (32-bit)
> 
> Running suite(s): Mult-s16
> 32 bit mult: 2228504 usec (avg: 22285, min = 18775, max = 29648, stddev = 3865.59).
> 64 bit mult: 5546861 usec (avg: 55468.6, min = 55028, max = 64924, stddev = 978.981).
> 100%: Checks: 1, Failures: 0, Errors: 0
> 
> on TI DM3730, Cortex-A8, 800MHz (32-bit)
> 
> Running suite(s): Mult-s16
> 32 bit mult: 23708900 usec (avg: 237089, min = 191864, max = 557312, stddev = 77503.6).
> 64 bit mult: 22190039 usec (avg: 221900, min = 177978, max = 480469, stddev = 68520.5).
> 100%: Checks: 1, Failures: 0, Errors: 0
> 
> there is a test program called mult-s16-test which checks that the functions compute the
> same results, and compares runtime

Where is that test program? I didn't find it in pulseaudio's source
tree.

-- 
Tanu