chromium-52.0.2743.82-arm-webrtc.patch

diff -up chromium-52.0.2743.82/third_party/webrtc/system_wrappers/source/cpu_features.cc.armwebrtc chromium-52.0.2743.82/third_party/webrtc/system_wrappers/source/cpu_features.cc
--- chromium-52.0.2743.82/third_party/webrtc/system_wrappers/source/cpu_features.cc.armwebrtc	2016-08-03 09:30:53.922861020 +0200
+++ chromium-52.0.2743.82/third_party/webrtc/system_wrappers/source/cpu_features.cc	2016-08-03 09:32:00.337498174 +0200
@@ -18,6 +18,47 @@
 
 #include "webrtc/typedefs.h"
 
+#include <elf.h>
+#ifdef __arm__
+#include <fcntl.h>
+#include <unistd.h>
+#include <linux/auxvec.h>
+#include <asm/hwcap.h>
+#endif
+
+#ifdef __arm__
+uint64_t WebRtc_GetCPUFeaturesARM() {
+	static bool detected = false;
+	static uint64_t have_neon = 0;
+
+	int fd;
+	Elf32_auxv_t auxv;
+	unsigned int hwcaps;
+
+	if (!detected) {
+		int fd;
+		Elf32_auxv_t auxv;
+		unsigned int hwcaps;
+
+		fd = open("/proc/self/auxv", O_RDONLY);
+		if (fd >= 0) {
+			while (read(fd, &auxv, sizeof(Elf32_auxv_t)) == sizeof(Elf32_auxv_t)) {
+				if (auxv.a_type == AT_HWCAP) {
+					have_neon = (auxv.a_un.a_val & HWCAP_NEON) ? kCPUFeatureNEON : 0;
+					break;
+				}
+			}
+			close (fd);
+		} else {
+			have_neon = 0;
+		}
+		detected = true;
+	}
+
+	return 0 | have_neon; // others here as we need them
+}
+#endif
+
 // No CPU feature is available => straight C path.
 int GetCPUInfoNoASM(CPUFeature feature) {
   (void)feature;