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.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 src/pulsecore/cpu-orc.h (limited to 'src/pulsecore/cpu-orc.h') diff --git a/src/pulsecore/cpu-orc.h b/src/pulsecore/cpu-orc.h new file mode 100644 index 00000000..9924d27b --- /dev/null +++ b/src/pulsecore/cpu-orc.h @@ -0,0 +1,37 @@ +#ifndef foocpuorchfoo +#define foocpuorchfoo + +/*** + 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. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include + +/* Orc-optimised bits */ + +void pa_cpu_init_orc(pa_cpu_info cpu_info); + +void pa_volume_func_init_orc(void); + +#endif /* foocpuorchfoo */ -- cgit