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 #include "talk/media/base/cpuid.h" 29 30 #include "libyuv/cpu_id.h" 31 32 namespace cricket { 33 34 bool CpuInfo::TestCpuFlag(int flag) { 35 return libyuv::TestCpuFlag(flag) ? true : false; 36 } 37 38 void CpuInfo::MaskCpuFlagsForTest(int enable_flags) { 39 libyuv::MaskCpuFlags(enable_flags); 40 } 41 42 // Detect an Intel Core I5 or better such as 4th generation Macbook Air. 43 bool IsCoreIOrBetter() { 44 #if defined(__i386__) || defined(__x86_64__) || \ 45 defined(_M_IX86) || defined(_M_X64) 46 uint32_t cpu_info[4]; 47 libyuv::CpuId(0, 0, &cpu_info[0]); // Function 0: Vendor ID 48 if (cpu_info[1] == 0x756e6547 && cpu_info[3] == 0x49656e69 && 49 cpu_info[2] == 0x6c65746e) { // GenuineIntel 50 // Detect CPU Family and Model 51 // 3:0 - Stepping 52 // 7:4 - Model 53 // 11:8 - Family 54 // 13:12 - Processor Type 55 // 19:16 - Extended Model 56 // 27:20 - Extended Family 57 libyuv::CpuId(1, 0, &cpu_info[0]); // Function 1: Family and Model 58 int family = ((cpu_info[0] >> 8) & 0x0f) | ((cpu_info[0] >> 16) & 0xff0); 59 int model = ((cpu_info[0] >> 4) & 0x0f) | ((cpu_info[0] >> 12) & 0xf0); 60 // CpuFamily | CpuModel | Name 61 // 6 | 14 | Yonah -- Core 62 // 6 | 15 | Merom -- Core 2 63 // 6 | 23 | Penryn -- Core 2 (most common) 64 // 6 | 26 | Nehalem -- Core i* 65 // 6 | 28 | Atom 66 // 6 | 30 | Lynnfield -- Core i* 67 // 6 | 37 | Westmere -- Core i* 68 const int kAtom = 28; 69 const int kCore2 = 23; 70 if (family < 6 || family == 15 || 71 (family == 6 && (model == kAtom || model <= kCore2))) { 72 return false; 73 } 74 return true; 75 } 76 #endif 77 return false; 78 } 79 80 } // namespace cricket 81
