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/*
* libjingle
* Copyright 2011 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/media/base/cpuid.h"
#include "libyuv/cpu_id.h"
namespace cricket {
bool CpuInfo::TestCpuFlag(int flag) {
return libyuv::TestCpuFlag(flag) ? true : false;
}
void CpuInfo::MaskCpuFlagsForTest(int enable_flags) {
libyuv::MaskCpuFlags(enable_flags);
}
// Detect an Intel Core I5 or better such as 4th generation Macbook Air.
bool IsCoreIOrBetter() {
#if defined(__i386__) || defined(__x86_64__) || \
defined(_M_IX86) || defined(_M_X64)
uint32_t cpu_info[4];
libyuv::CpuId(0, 0, &cpu_info[0]); // Function 0: Vendor ID
if (cpu_info[1] == 0x756e6547 && cpu_info[3] == 0x49656e69 &&
cpu_info[2] == 0x6c65746e) { // GenuineIntel
// Detect CPU Family and Model
// 3:0 - Stepping
// 7:4 - Model
// 11:8 - Family
// 13:12 - Processor Type
// 19:16 - Extended Model
// 27:20 - Extended Family
libyuv::CpuId(1, 0, &cpu_info[0]); // Function 1: Family and Model
int family = ((cpu_info[0] >> 8) & 0x0f) | ((cpu_info[0] >> 16) & 0xff0);
int model = ((cpu_info[0] >> 4) & 0x0f) | ((cpu_info[0] >> 12) & 0xf0);
// CpuFamily | CpuModel | Name
// 6 | 14 | Yonah -- Core
// 6 | 15 | Merom -- Core 2
// 6 | 23 | Penryn -- Core 2 (most common)
// 6 | 26 | Nehalem -- Core i*
// 6 | 28 | Atom
// 6 | 30 | Lynnfield -- Core i*
// 6 | 37 | Westmere -- Core i*
const int kAtom = 28;
const int kCore2 = 23;
if (family < 6 || family == 15 ||
(family == 6 && (model == kAtom || model <= kCore2))) {
return false;
}
return true;
}
#endif
return false;
}
} // namespace cricket
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