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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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Chromium Code Reviews
Issue 1587193006:
Move talk/media to webrtc/media (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master