Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/oboe/src/flowgraph/FlowgraphUtilities.h

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FLOWGRAPH_UTILITIES_H
+#define FLOWGRAPH_UTILITIES_H
+
+#include <math.h>
+#include <unistd.h>
+
+using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
+
+class FlowgraphUtilities {
+public:
+// This was copied from audio_utils/primitives.h
+/**
+ * Convert a single-precision floating point value to a Q0.31 integer value.
+ * Rounds to nearest, ties away from 0.
+ *
+ * Values outside the range [-1.0, 1.0) are properly clamped to -2147483648 and 2147483647,
+ * including -Inf and +Inf. NaN values are considered undefined, and behavior may change
+ * depending on hardware and future implementation of this function.
+ */
+static int32_t clamp32FromFloat(float f)
+{
+    static const float scale = (float)(1UL << 31);
+    static const float limpos = 1.;
+    static const float limneg = -1.;
+
+    if (f <= limneg) {
+        return INT32_MIN;
+    } else if (f >= limpos) {
+        return INT32_MAX;
+    }
+    f *= scale;
+    /* integer conversion is through truncation (though int to float is not).
+     * ensure that we round to nearest, ties away from 0.
+     */
+    return f > 0 ? f + 0.5 : f - 0.5;
+}
+
+/**
+ * Convert a single-precision floating point value to a Q0.23 integer value, stored in a
+ * 32 bit signed integer (technically stored as Q8.23, but clamped to Q0.23).
+ *
+ * Values outside the range [-1.0, 1.0) are properly clamped to -8388608 and 8388607,
+ * including -Inf and +Inf. NaN values are considered undefined, and behavior may change
+ * depending on hardware and future implementation of this function.
+ */
+static int32_t clamp24FromFloat(float f)
+{
+    static const float scale = 1 << 23;
+    return (int32_t) lroundf(fmaxf(fminf(f * scale, scale - 1.f), -scale));
+}
+
+};
+
+#endif // FLOWGRAPH_UTILITIES_H