mirror of
https://github.com/danog/libtgvoip.git
synced 2024-12-12 09:09:38 +01:00
5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// Parts of this file derived from Chromium's base/cpu.cc.
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#include "system_wrappers/include/cpu_features_wrapper.h"
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#if defined(WEBRTC_ARCH_X86_FAMILY) && defined(_MSC_VER)
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#include <intrin.h>
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#endif
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#include "typedefs.h"
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// No CPU feature is available => straight C path.
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int GetCPUInfoNoASM(CPUFeature feature) {
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(void)feature;
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return 0;
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}
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#if defined(WEBRTC_ARCH_X86_FAMILY)
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#ifndef _MSC_VER
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// Intrinsic for "cpuid".
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#if defined(__pic__) && defined(__i386__)
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static inline void __cpuid(int cpu_info[4], int info_type) {
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__asm__ volatile(
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"mov %%ebx, %%edi\n"
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"cpuid\n"
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"xchg %%edi, %%ebx\n"
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: "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
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: "a"(info_type));
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}
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#else
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static inline void __cpuid(int cpu_info[4], int info_type) {
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__asm__ volatile(
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"cpuid\n"
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: "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
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: "a"(info_type));
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}
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#endif
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#endif // _MSC_VER
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#endif // WEBRTC_ARCH_X86_FAMILY
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#if defined(WEBRTC_ARCH_X86_FAMILY)
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// Actual feature detection for x86.
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static int GetCPUInfo(CPUFeature feature) {
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int cpu_info[4];
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__cpuid(cpu_info, 1);
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if (feature == kSSE2) {
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return 0 != (cpu_info[3] & 0x04000000);
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}
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if (feature == kSSE3) {
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return 0 != (cpu_info[2] & 0x00000001);
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}
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return 0;
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}
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#else
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// Default to straight C for other platforms.
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static int GetCPUInfo(CPUFeature feature) {
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(void)feature;
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return 0;
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}
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#endif
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WebRtc_CPUInfo WebRtc_GetCPUInfo = GetCPUInfo;
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WebRtc_CPUInfo WebRtc_GetCPUInfoNoASM = GetCPUInfoNoASM;
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