1 files changed, 0 insertions, 109 deletions
diff --git a/externals/oboe/samples/shared/SynthSound.h b/externals/oboe/samples/shared/SynthSound.h
deleted file mode 100644
index 01acd4de15..0000000000
--- a/externals/oboe/samples/shared/SynthSound.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * 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 SHARED_SYNTH_SOUND_H
-#define SHARED_SYNTH_SOUND_H
-#include <cstdint>
-#include <atomic>
-#include <math.h>
-#include <memory>
-#include "IRenderableAudio.h"
-constexpr float kDefaultFrequency = 440.0;
-constexpr int32_t kDefaultSampleRate = 48000;
-constexpr float kPi = M_PI;
-constexpr float kTwoPi = kPi * 2;
-constexpr int32_t kNumSineWaves = 5;
-constexpr float kSustainMultiplier = 0.99999;
-constexpr float kReleaseMultiplier = 0.999;
-// Stop playing music below this cutoff
-constexpr float kMasterAmplitudeCutOff = 0.01;
-
-class SynthSound : public IRenderableAudio {
-
-public:
-    SynthSound() {
-
-    }
-
-    ~SynthSound() {
-
-    };
-
-    void noteOn() {
-        mTrigger = true; // start a note envelope
-        mAmplitudeScaler = kSustainMultiplier;
-    }
-
-    void noteOff() {
-        mAmplitudeScaler = kReleaseMultiplier;
-    }
-
-    void setSampleRate(int32_t sampleRate) {
-        mSampleRate = sampleRate;
-        updatePhaseIncrement();
-    };
-    void setFrequency(float frequency) {
-        mFrequency = frequency;
-        updatePhaseIncrement();
-    };
-    // Amplitudes from https://epubs.siam.org/doi/pdf/10.1137/S00361445003822
-    inline void setAmplitude(float amplitude) {
-        mAmplitudes[0] = amplitude * .2f;
-        mAmplitudes[1] = amplitude;
-        mAmplitudes[2] = amplitude * .1f;
-        mAmplitudes[3] = amplitude * .02f;
-        mAmplitudes[4] = amplitude * .15f;
-    };
-    // From IRenderableAudio
-    void renderAudio(float *audioData, int32_t numFrames) override {
-        for (int i = 0; i < numFrames; ++i) {
-            if (mTrigger.exchange(false)) {
-                mMasterAmplitude = 1.0;
-                mPhase = 0.0f;
-            } else {
-                mMasterAmplitude *= mAmplitudeScaler;
-            }
-
-            audioData[i] = 0;
-            if (mMasterAmplitude < kMasterAmplitudeCutOff) {
-                continue;
-            }
-            for (int j = 0; j < kNumSineWaves; ++j) {
-                audioData[i] += sinf(mPhase * (j + 1)) * mAmplitudes[j] * mMasterAmplitude;
-            }
-            mPhase += mPhaseIncrement;
-            if (mPhase > kTwoPi) {
-                mPhase -=  kTwoPi;
-            }
-        }
-    };
-
-private:
-    std::atomic<bool> mTrigger { false };
-    float mMasterAmplitude = 0.0f;
-    std::atomic<float> mAmplitudeScaler { 0.0f };
-    std::array<std::atomic<float>, kNumSineWaves> mAmplitudes;
-    float mPhase = 0.0f;
-    std::atomic<float> mPhaseIncrement { 0 };
-    std::atomic<float> mFrequency { kDefaultFrequency };
-    std::atomic<int32_t> mSampleRate { kDefaultSampleRate };
-    void updatePhaseIncrement(){
-        // Note how there is a division here. If this file is changed so that updatePhaseIncrement
-        // is called more frequently, please cache 1/mSampleRate. This allows this operation to not
-        // need divisions.
-        mPhaseIncrement = kTwoPi * mFrequency / static_cast<float>(mSampleRate);
-    };
-};
-#endif //SHARED_SYNTH_SOUND_H