1 files changed, 58 insertions, 0 deletions
diff --git a/third_party/libwebrtc/common_audio/fir_filter_factory.cc b/third_party/libwebrtc/common_audio/fir_filter_factory.cc
new file mode 100644
index 0000000000..2ecef6501f
--- /dev/null
+++ b/third_party/libwebrtc/common_audio/fir_filter_factory.cc
@@ -0,0 +1,58 @@
+/*
+ *  Copyright (c) 2017 The WebRTC 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 "common_audio/fir_filter_factory.h"
+
+#include "common_audio/fir_filter_c.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/system/arch.h"
+
+#if defined(WEBRTC_HAS_NEON)
+#include "common_audio/fir_filter_neon.h"
+#elif defined(WEBRTC_ARCH_X86_FAMILY)
+#include "common_audio/fir_filter_avx2.h"
+#include "common_audio/fir_filter_sse.h"
+#include "system_wrappers/include/cpu_features_wrapper.h"  // kSSE2, WebRtc_G...
+#endif
+
+namespace webrtc {
+
+FIRFilter* CreateFirFilter(const float* coefficients,
+                           size_t coefficients_length,
+                           size_t max_input_length) {
+  if (!coefficients || coefficients_length <= 0 || max_input_length <= 0) {
+    RTC_DCHECK_NOTREACHED();
+    return nullptr;
+  }
+
+  FIRFilter* filter = nullptr;
+// If we know the minimum architecture at compile time, avoid CPU detection.
+#if defined(WEBRTC_ARCH_X86_FAMILY)
+  // x86 CPU detection required.
+  if (GetCPUInfo(kAVX2)) {
+    filter =
+        new FIRFilterAVX2(coefficients, coefficients_length, max_input_length);
+  } else if (GetCPUInfo(kSSE2)) {
+    filter =
+        new FIRFilterSSE2(coefficients, coefficients_length, max_input_length);
+  } else {
+    filter = new FIRFilterC(coefficients, coefficients_length);
+  }
+#elif defined(WEBRTC_HAS_NEON)
+  filter =
+      new FIRFilterNEON(coefficients, coefficients_length, max_input_length);
+#else
+  filter = new FIRFilterC(coefficients, coefficients_length);
+#endif
+
+  return filter;
+}
+
+}  // namespace webrtc