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4cd90d9e32
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.
34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include "cpu-orc.h"
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void pa_cpu_init_orc(pa_cpu_info cpu_info)
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{
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#ifndef DISABLE_ORC
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/* Update these as we test on more architectures */
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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;
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/* Enable Orc svolume optimizations */
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if ((cpu_info.cpu_type == PA_CPU_X86) && (cpu_info.flags.x86 & x86_want_flags))
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pa_volume_func_init_orc();
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#endif
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}
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