89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
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/*
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* libjingle
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* Copyright 2011 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "talk/media/base/cpuid.h"
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#if !defined(DISABLE_YUV)
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#include "libyuv/cpu_id.h"
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#endif
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namespace cricket {
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bool CpuInfo::TestCpuFlag(int flag) {
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#if !defined(DISABLE_YUV)
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return libyuv::TestCpuFlag(flag) ? true : false;
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#else
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return false;
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#endif
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}
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void CpuInfo::MaskCpuFlagsForTest(int enable_flags) {
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#if !defined(DISABLE_YUV)
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libyuv::MaskCpuFlags(enable_flags);
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#endif
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}
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// Detect an Intel Core I5 or better such as 4th generation Macbook Air.
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bool IsCoreIOrBetter() {
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#if !defined(DISABLE_YUV) && (defined(__i386__) || defined(__x86_64__) || \
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defined(_M_IX86) || defined(_M_X64))
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int cpu_info[4];
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libyuv::CpuId(cpu_info, 0); // Function 0: Vendor ID
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if (cpu_info[1] == 0x756e6547 && cpu_info[3] == 0x49656e69 &&
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cpu_info[2] == 0x6c65746e) { // GenuineIntel
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// Detect CPU Family and Model
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// 3:0 - Stepping
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// 7:4 - Model
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// 11:8 - Family
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// 13:12 - Processor Type
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// 19:16 - Extended Model
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// 27:20 - Extended Family
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libyuv::CpuId(cpu_info, 1); // Function 1: Family and Model
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int family = ((cpu_info[0] >> 8) & 0x0f) | ((cpu_info[0] >> 16) & 0xff0);
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int model = ((cpu_info[0] >> 4) & 0x0f) | ((cpu_info[0] >> 12) & 0xf0);
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// CpuFamily | CpuModel | Name
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// 6 | 14 | Yonah -- Core
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// 6 | 15 | Merom -- Core 2
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// 6 | 23 | Penryn -- Core 2 (most common)
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// 6 | 26 | Nehalem -- Core i*
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// 6 | 28 | Atom
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// 6 | 30 | Lynnfield -- Core i*
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// 6 | 37 | Westmere -- Core i*
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const int kAtom = 28;
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const int kCore2 = 23;
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if (family < 6 || family == 15 ||
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(family == 6 && (model == kAtom || model <= kCore2))) {
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return false;
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}
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return true;
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}
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#endif
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return false;
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}
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} // namespace cricket
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