| henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 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 "talk/base/basictypes.h" // For DISALLOW_IMPLICIT_CONSTRUCTORS |
| 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 | 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_ |