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9 commits

Author SHA1 Message Date
Tanu Kaskinen
179cacfc66 mix: Mix the right number of streams 
Passing channels instead of nstreams to pa_mix_ch2_s16ne() caused that
only the first two streams got mixed.

BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=63093
 2013-04-09 14:56:18 +03:00
Peter Meerwald
7758076d9c mix: Change end pointer to length parameter in mixing function 
similar to volume functions, simplifies leftover samples handling
for SIMD'd code path

use concrete pointer type (e.g. int16_t*) instead of void*,
saves several casts

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:53:43 +02:00
Peter Meerwald
c1cac8d82b mix: Add special cases for mixing streams in s16ne format 
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:40:07 +02:00
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
b123cfa7c9 mix: Combine loops over streams in pa_mix() 
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:34:09 +02:00
Peter Meerwald
9fa000bbfc mix: Export function to get/set mixing implementation for a sample format 
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:34:03 +02:00
Peter Meerwald
fe455ae013 mix: Split pa_mix() code using function table 
have individual function for mixing stream with different sample format instead
of huge case block in pa_mix()

shorter functions, prepare for optimized code path

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:33:52 +02:00
Peter Meerwald
c90868f2e0 mix: Use table for calc_stream_columes() 
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:33:42 +02:00
Peter Meerwald
95b64804ab core: Move pa_mix() into new file mix.c 
idea is to allow optimized code path (similar to volume code)
and rework/specialize mixing cases to enable runtime performance improvements

no functionality changes in this patch

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
 2013-02-15 21:33:07 +02:00