Move dead submodules in-tree

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

1 files changed, 106 insertions, 0 deletions

diff --git a/externals/oboe/samples/iolib/src/main/cpp/player/SampleSource.h b/externals/oboe/samples/iolib/src/main/cpp/player/SampleSource.h
new file mode 100644
index 0000000000..54edbf1f9b
--- /dev/null
+++ b/externals/oboe/samples/iolib/src/main/cpp/player/SampleSource.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 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 _PLAYER_SAMPLESOURCE_
+#define _PLAYER_SAMPLESOURCE_
+
+#include <cstdint>
+
+#include "DataSource.h"
+
+#include "SampleBuffer.h"
+
+namespace iolib {
+
+/**
+ * Defines an interface for audio data provided to a player object.
+ * Concrete examples include OneShotSampleBuffer. One could imagine a LoopingSampleBuffer.
+ * Supports stereo position via mPan member.
+ */
+class SampleSource: public DataSource {
+public:
+    // Pan position of the audio in a stereo mix
+    // [left:-1.0f] <- [center: 0.0f] -> -[right: 1.0f]
+    static constexpr float PAN_HARDLEFT = -1.0f;
+    static constexpr float PAN_HARDRIGHT = 1.0f;
+    static constexpr float PAN_CENTER = 0.0f;
+
+    SampleSource(SampleBuffer *sampleBuffer, float pan)
+     : mSampleBuffer(sampleBuffer), mCurSampleIndex(0), mIsPlaying(false), mIsLoopMode(false), mGain(1.0f) {
+        setPan(pan);
+    }
+    virtual ~SampleSource() {}
+
+    void setPlayMode() { mCurSampleIndex = 0; mIsPlaying = true; }
+    void setStopMode() { mIsPlaying = false; mCurSampleIndex = 0; }
+
+    void setLoopMode(bool isLoopMode) { mIsLoopMode = isLoopMode; }
+
+    bool isPlaying() { return mIsPlaying; }
+
+    void setPan(float pan) {
+        if (pan < PAN_HARDLEFT) {
+            mPan = PAN_HARDLEFT;
+        } else if (pan > PAN_HARDRIGHT) {
+            mPan = PAN_HARDRIGHT;
+        } else {
+            mPan = pan;
+        }
+        calcGainFactors();
+    }
+
+    float getPan() {
+        return mPan;
+    }
+
+    void setGain(float gain) {
+        mGain = gain;
+        calcGainFactors();
+    }
+
+    float getGain() {
+        return mGain;
+    }
+
+protected:
+    SampleBuffer    *mSampleBuffer;
+
+    int32_t mCurSampleIndex;
+
+    bool mIsPlaying;
+    std::atomic<bool> mIsLoopMode;
+
+    // Logical pan value
+    float mPan;
+
+    // precomputed channel gains for pan
+    float mLeftGain;
+    float mRightGain;
+
+    // Overall gain
+    float mGain;
+
+private:
+    void calcGainFactors() {
+        // useful panning information: http://www.cs.cmu.edu/~music/icm-online/readings/panlaws/
+        float rightPan = (mPan * 0.5) + 0.5;
+        mRightGain = rightPan * mGain;
+        mLeftGain = (1.0 - rightPan) * mGain;    }
+};
+
+} // namespace wavlib
+
+#endif //_PLAYER_SAMPLESOURCE_