1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CPU_FEATURES_WRAPPER_H_ 12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CPU_FEATURES_WRAPPER_H_ 13 14 #if defined(__cplusplus) || defined(c_plusplus) 15 extern "C" { 16 #endif 17 18 #include "webrtc/typedefs.h" 19 20 // List of features in x86. 21 typedef enum { 22 kSSE2, 23 kSSE3 24 } CPUFeature; 25 26 // List of features in ARM. 27 enum { 28 kCPUFeatureARMv7 = (1 << 0), 29 kCPUFeatureVFPv3 = (1 << 1), 30 kCPUFeatureNEON = (1 << 2), 31 kCPUFeatureLDREXSTREX = (1 << 3) 32 }; 33 34 typedef int (*WebRtc_CPUInfo)(CPUFeature feature); 35 36 // Returns true if the CPU supports the feature. 37 extern WebRtc_CPUInfo WebRtc_GetCPUInfo; 38 39 // No CPU feature is available => straight C path. 40 extern WebRtc_CPUInfo WebRtc_GetCPUInfoNoASM; 41 42 // Return the features in an ARM device. 43 // It detects the features in the hardware platform, and returns supported 44 // values in the above enum definition as a bitmask. 45 extern uint64_t WebRtc_GetCPUFeaturesARM(void); 46 47 #if defined(__cplusplus) || defined(c_plusplus) 48 } // extern "C" 49 #endif 50 51 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CPU_FEATURES_WRAPPER_H_ 52