mirror of
https://github.com/mpv-player/mpv
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2bc2399797
Make "-lavdopts threads=0" mean an autodetected number of threads, and make that the default value of the option. Also increase the upper limit of the option from 8 to 16. Add new file osdep/numcores.c which tries to determine the number of cores available on the machine. numcores.c is based (heavily modified) on public domain numcpus.c by Philip Willoughby <pgw99@doc.ic.ac.uk>, downloaded from http://csgsoft.doc.ic.ac.uk/numcpus/
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include "numcores.h"
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#ifdef _SC_NPROCESSORS_ONLN
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#define SCNAME _SC_NPROCESSORS_ONLN
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#elif defined _SC_NPROC_ONLN
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#define SCNAME _SC_NPROC_ONLN
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#elif defined _SC_CRAY_NCPU
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#define SCNAME _SC_CRAY_NCPU
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#endif
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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int default_thread_count(void)
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{
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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int count = info.dwNumberOfProcessors;
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if (count > 0)
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return count;
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return -1;
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}
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#elif defined SCNAME
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int default_thread_count(void)
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{
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long nprocs = sysconf(SCNAME);
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if (nprocs < 1)
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return -1;
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return nprocs;
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}
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#else
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int default_thread_count(void)
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{
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return -2;
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}
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#endif
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