From 4cd90d9e32ca9a23e3c0f7615974ea0c55ff3e49 Mon Sep 17 00:00:00 2001 From: Arun Raghavan Date: Mon, 25 Oct 2010 17:59:08 +0100 Subject: volume: Add Orc-based optimised volume scaling This adds volume scaling for 1- and 2-channel software volume scaling using Orc. While testing the MMX and SSE backends on a Core2, I see an ~2x performance benefit over the hand-rolled MMX and SSE code. Since I haven't been able to test on other architectures, the Orc code is only used when MMX/SSE* is present. This can be changed in the future after testing on AMD and ARM machines. --- src/pulsecore/cpu-orc.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 src/pulsecore/cpu-orc.c (limited to 'src/pulsecore/cpu-orc.c') diff --git a/src/pulsecore/cpu-orc.c b/src/pulsecore/cpu-orc.c new file mode 100644 index 00000000..d4a15357 --- /dev/null +++ b/src/pulsecore/cpu-orc.c @@ -0,0 +1,34 @@ +/*** + This file is part of PulseAudio. + + Copyright 2010 Arun Raghavan + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#include "cpu-orc.h" + +void pa_cpu_init_orc(pa_cpu_info cpu_info) +{ +#ifndef DISABLE_ORC + /* Update these as we test on more architectures */ + pa_cpu_x86_flag_t x86_want_flags = PA_CPU_X86_MMX | PA_CPU_X86_SSE | PA_CPU_X86_SSE2 | PA_CPU_X86_SSE3 | PA_CPU_X86_SSSE3 | PA_CPU_X86_SSE4_1 | PA_CPU_X86_SSE4_2; + + /* Enable Orc svolume optimizations */ + if ((cpu_info.cpu_type == PA_CPU_X86) && (cpu_info.flags.x86 & x86_want_flags)) + pa_volume_func_init_orc(); +#endif +} -- cgit