1 files changed, 52 insertions, 0 deletions
diff --git a/vpx_ports/arm_cpudetect.h b/vpx_ports/arm_cpudetect.h
new file mode 100644
index 000000000..881397abc
--- /dev/null
+++ b/vpx_ports/arm_cpudetect.h
@@ -0,0 +1,52 @@
+/*
+ *  Copyright (c) 2023 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "vpx_config.h"
+#include "vpx_ports/arm.h"
+
+#if defined(_WIN32)
+#undef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#undef WIN32_EXTRA_LEAN
+#define WIN32_EXTRA_LEAN
+#include <windows.h>
+#endif
+
+#ifdef WINAPI_FAMILY
+#include <winapifamily.h>
+#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#define getenv(x) NULL
+#endif
+#endif
+
+#if defined(__ANDROID__) && (__ANDROID_API__ < 18)
+#define ANDROID_USE_CPU_FEATURES_LIB 1
+// Use getauxval() when targeting (64-bit) Android with API level >= 18.
+// getauxval() is supported since Android API level 18 (Android 4.3.)
+// First Android version with 64-bit support was Android 5.x (API level 21).
+#include <cpu-features.h>
+#endif
+
+static INLINE int arm_cpu_env_flags(int *flags) {
+  const char *env = getenv("VPX_SIMD_CAPS");
+  if (env && *env) {
+    *flags = (int)strtol(env, NULL, 0);
+    return 1;
+  }
+  return 0;
+}
+
+static INLINE int arm_cpu_env_mask(void) {
+  const char *env = getenv("VPX_SIMD_CAPS_MASK");
+  return env && *env ? (int)strtol(env, NULL, 0) : ~0;
+}