Move dead submodules in-tree

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

externals/oboe/samples/MegaDrone/src/main/cpp/Synth.h

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2018 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 MEGADRONE_SYNTH_H
+#define MEGADRONE_SYNTH_H
+
+#include <array>
+#include <TappableAudioSource.h>
+
+#include <Oscillator.h>
+#include <Mixer.h>
+#include <MonoToStereo.h>
+
+constexpr int kNumOscillators = 100;
+constexpr float kOscBaseFrequency = 116.0;
+constexpr float kOscDivisor = 33;
+constexpr float kOscAmplitude = 0.009;
+
+
+class Synth : public TappableAudioSource {
+public:
+
+    Synth(int32_t sampleRate, int32_t channelCount) :
+    TappableAudioSource(sampleRate, channelCount) {
+        for (int i = 0; i < kNumOscillators; ++i) {
+            mOscs[i].setSampleRate(mSampleRate);
+            mOscs[i].setFrequency(kOscBaseFrequency + (static_cast<float>(i) / kOscDivisor));
+            mOscs[i].setAmplitude(kOscAmplitude);
+            mMixer.addTrack(&mOscs[i]);
+        }
+        if (mChannelCount == oboe::ChannelCount::Stereo) {
+            mOutputStage =  &mConverter;
+        } else {
+            mOutputStage = &mMixer;
+        }
+    }
+
+    void tap(bool isOn) override {
+        for (auto &osc : mOscs) osc.setWaveOn(isOn);
+    };
+
+    // From IRenderableAudio
+    void renderAudio(float *audioData, int32_t numFrames) override {
+        mOutputStage->renderAudio(audioData, numFrames);
+    };
+
+    virtual ~Synth() {
+    }
+private:
+    // Rendering objects
+    std::array<Oscillator, kNumOscillators> mOscs;
+    Mixer mMixer;
+    MonoToStereo mConverter = MonoToStereo(&mMixer);
+    IRenderableAudio *mOutputStage; // This will point to either the mixer or converter, so it needs to be raw
+};
+
+
+#endif //MEGADRONE_SYNTH_H