1 /*
2  * libjingle
3  * Copyright 2011 Google Inc.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  *  1. Redistributions of source code must retain the above copyright notice,
9  *     this list of conditions and the following disclaimer.
10  *  2. Redistributions in binary form must reproduce the above copyright notice,
11  *     this list of conditions and the following disclaimer in the documentation
12  *     and/or other materials provided with the distribution.
13  *  3. The name of the author may not be used to endorse or promote products
14  *     derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #ifndef TALK_MEDIA_BASE_CPUID_H_
29 #define TALK_MEDIA_BASE_CPUID_H_
30 
31 #include "webrtc/base/constructormagic.h"
32 
33 namespace cricket {
34 
35 class CpuInfo {
36  public:
37   // The following flags must match libyuv/cpu_id.h values.
38   // Internal flag to indicate cpuid requires initialization.
39   static const int kCpuInit = 0x1;
40 
41   // These flags are only valid on ARM processors.
42   static const int kCpuHasARM = 0x2;
43   static const int kCpuHasNEON = 0x4;
44   // 0x8 reserved for future ARM flag.
45 
46   // These flags are only valid on x86 processors.
47   static const int kCpuHasX86 = 0x10;
48   static const int kCpuHasSSE2 = 0x20;
49   static const int kCpuHasSSSE3 = 0x40;
50   static const int kCpuHasSSE41 = 0x80;
51   static const int kCpuHasSSE42 = 0x100;
52   static const int kCpuHasAVX = 0x200;
53   static const int kCpuHasAVX2 = 0x400;
54   static const int kCpuHasERMS = 0x800;
55 
56   // These flags are only valid on MIPS processors.
57   static const int kCpuHasMIPS = 0x1000;
58   static const int kCpuHasMIPS_DSP = 0x2000;
59   static const int kCpuHasMIPS_DSPR2 = 0x4000;
60 
61   // Detect CPU has SSE2 etc.
62   static bool TestCpuFlag(int flag);
63 
64   // For testing, allow CPU flags to be disabled.
65   static void MaskCpuFlagsForTest(int enable_flags);
66 
67  private:
68   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(CpuInfo);
69 };
70 
71 // Detect an Intel Core I5 or better such as 4th generation Macbook Air.
72 bool IsCoreIOrBetter();
73 
74 }  // namespace cricket
75 
76 #endif  // TALK_MEDIA_BASE_CPUID_H_
77