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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 | |
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