Commit graph

8 commits

Author SHA1 Message Date
Peter Meerwald
8fa81a93c9 core: Refactor code to multiply s16 by volume
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

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
2013-02-15 21:34:13 +02:00
Peter Meerwald
503de445a6 core: Set volumes const in pa_do_volume_func_t
volumes do not change, the samples get scaled

Signed-off-by: Peter Meerwald <p.meerwald@bct-electronic.com>
2012-07-17 11:22:09 +05:30
Maarten Bosmans
c5dca7cf2b More spelling fixes 2011-08-25 11:27:47 +01:00
Maarten Bosmans
dd9265ac78 Remove unnecessary #includes 2011-06-22 23:12:20 +01:00
Maarten Bosmans
b3721a12c5 Fixup #include directives according to Coding Style
Use #include "header.h" if functionality of header.h is implemented
and #include <header.h> if functionality of header.h is used.
2011-03-11 11:49:39 +00:00
Maarten Bosmans
ecf09f2cd6 Fix up according to Coding Style
Only whitespace changes in here
2011-03-11 11:49:35 +00:00
Wim Taymans
f09b51198f whitespace fixes 2009-08-20 11:31:04 +02:00
Wim Taymans
3d008961c0 sample-util: move volume code to separate file
Move the volume code into a separate file with the reference C implementations.
Add a function to retrieve the volume function and one to install a new one.
2009-08-20 11:29:48 +02:00