[cmake] refactor: Use CPM over submodules (#143)

Transfers the majority of submodules and large externals to CPM, using source archives rather than full Git clones. Not only does this save massive amounts of clone and configure time, but dependencies are grabbed on-demand rather than being required by default. Additionally, CPM will (generally) automatically search for system dependencies, though certain dependencies have options to control this.

Testing shows gains ranging from 5x to 10x in terms of overall clone/configure time.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/143
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

43 files changed, 0 insertions, 2206 deletions

diff --git a/externals/oboe/samples/RhythmGame/src/main/AndroidManifest.xml b/externals/oboe/samples/RhythmGame/src/main/AndroidManifest.xml
deleted file mode 100644
index 36840c667a..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/AndroidManifest.xml
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <application
-        android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsRtl="true"
-        android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity"
-            android:screenOrientation="portrait"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
-
-</manifest>
diff --git a/externals/oboe/samples/RhythmGame/src/main/assets/CLAP.mp3 b/externals/oboe/samples/RhythmGame/src/main/assets/CLAP.mp3
deleted file mode 100644
index 857c015b40..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/assets/CLAP.mp3
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/assets/FUNKY_HOUSE.mp3 b/externals/oboe/samples/RhythmGame/src/main/assets/FUNKY_HOUSE.mp3
deleted file mode 100644
index 30c651c779..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/assets/FUNKY_HOUSE.mp3
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/Game.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/Game.cpp
deleted file mode 100644
index 199f4cce14..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/Game.cpp
+++ /dev/null
@@ -1,241 +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.
- */
-
-#include <utils/logging.h>
-#include <thread>
-#include <cinttypes>
-
-#include "Game.h"
-
-Game::Game(AAssetManager &assetManager): mAssetManager(assetManager) {
-}
-
-void Game::load() {
-
-    if (!openStream()) {
-        mGameState = GameState::FailedToLoad;
-        return;
-    }
-
-    if (!setupAudioSources()) {
-        mGameState = GameState::FailedToLoad;
-        return;
-    }
-
-    scheduleSongEvents();
-
-    Result result = mAudioStream->requestStart();
-    if (result != Result::OK){
-        LOGE("Failed to start stream. Error: %s", convertToText(result));
-        mGameState = GameState::FailedToLoad;
-        return;
-    }
-
-    mGameState = GameState::Playing;
-}
-
-void Game::start() {
-
-    // async returns a future, we must store this future to avoid blocking. It's not sufficient
-    // to store this in a local variable as its destructor will block until Game::load completes.
-    mLoadingResult = std::async(&Game::load, this);
-}
-
-void Game::stop(){
-
-    if (mAudioStream){
-        mAudioStream->stop();
-        mAudioStream->close();
-        mAudioStream.reset();
-    }
-}
-
-void Game::tap(int64_t eventTimeAsUptime) {
-
-    if (mGameState != GameState::Playing){
-        LOGW("Game not in playing state, ignoring tap event");
-    } else {
-        mClap->setPlaying(true);
-
-        int64_t nextClapWindowTimeMs;
-        if (mClapWindows.pop(nextClapWindowTimeMs)){
-
-            // Convert the tap time to a song position
-            int64_t tapTimeInSongMs = mSongPositionMs + (eventTimeAsUptime - mLastUpdateTime);
-            TapResult result = getTapResult(tapTimeInSongMs, nextClapWindowTimeMs);
-            mUiEvents.push(result);
-        }
-    }
-}
-
-void Game::tick(){
-
-    switch (mGameState){
-        case GameState::Playing:
-            TapResult r;
-            if (mUiEvents.pop(r)) {
-                renderEvent(r);
-            } else {
-                SetGLScreenColor(kPlayingColor);
-            }
-            break;
-
-        case GameState::Loading:
-            SetGLScreenColor(kLoadingColor);
-            break;
-
-        case GameState::FailedToLoad:
-            SetGLScreenColor(kLoadingFailedColor);
-            break;
-    }
-}
-
-void Game::onSurfaceCreated() {
-    SetGLScreenColor(kLoadingColor);
-}
-
-void Game::onSurfaceChanged(int widthInPixels, int heightInPixels) {
-}
-
-void Game::onSurfaceDestroyed() {
-}
-
-DataCallbackResult Game::onAudioReady(AudioStream *oboeStream, void *audioData, int32_t numFrames) {
-
-    auto *outputBuffer = static_cast<float *>(audioData);
-
-    int64_t nextClapEventMs;
-
-    for (int i = 0; i < numFrames; ++i) {
-
-        mSongPositionMs = convertFramesToMillis(
-                mCurrentFrame,
-                mAudioStream->getSampleRate());
-
-        if (mClapEvents.peek(nextClapEventMs) && mSongPositionMs >= nextClapEventMs){
-            mClap->setPlaying(true);
-            mClapEvents.pop(nextClapEventMs);
-        }
-        mMixer.renderAudio(outputBuffer+(oboeStream->getChannelCount()*i), 1);
-        mCurrentFrame++;
-    }
-
-    mLastUpdateTime = nowUptimeMillis();
-
-    return DataCallbackResult::Continue;
-}
-
-void Game::onErrorAfterClose(AudioStream *audioStream, Result error) {
-    if (error == Result::ErrorDisconnected){
-        mGameState = GameState::Loading;
-        mAudioStream.reset();
-        mMixer.removeAllTracks();
-        mCurrentFrame = 0;
-        mSongPositionMs = 0;
-        mLastUpdateTime = 0;
-        start();
-    } else {
-        LOGE("Stream error: %s", convertToText(error));
-    }
-}
-
-/**
- * Get the result of a tap
- *
- * @param tapTimeInMillis - The time the tap occurred in milliseconds
- * @param tapWindowInMillis - The time at the middle of the "tap window" in milliseconds
- * @return TapResult can be Early, Late or Success
- */
-TapResult Game::getTapResult(int64_t tapTimeInMillis, int64_t tapWindowInMillis){
-    LOGD("Tap time %" PRId64 ", tap window time: %" PRId64, tapTimeInMillis, tapWindowInMillis);
-    if (tapTimeInMillis <= tapWindowInMillis + kWindowCenterOffsetMs) {
-        if (tapTimeInMillis >= tapWindowInMillis - kWindowCenterOffsetMs) {
-            return TapResult::Success;
-        } else {
-            return TapResult::Early;
-        }
-    } else {
-        return TapResult::Late;
-    }
-}
-
-bool Game::openStream() {
-
-    // Create an audio stream
-    AudioStreamBuilder builder;
-    builder.setFormat(AudioFormat::Float);
-    builder.setFormatConversionAllowed(true);
-    builder.setPerformanceMode(PerformanceMode::LowLatency);
-    builder.setSharingMode(SharingMode::Exclusive);
-    builder.setSampleRate(48000);
-    builder.setSampleRateConversionQuality(
-            SampleRateConversionQuality::Medium);
-    builder.setChannelCount(2);
-    builder.setDataCallback(this);
-    builder.setErrorCallback(this);
-    Result result = builder.openStream(mAudioStream);
-    if (result != Result::OK){
-        LOGE("Failed to open stream. Error: %s", convertToText(result));
-        return false;
-    }
-
-    mMixer.setChannelCount(mAudioStream->getChannelCount());
-
-    return true;
-}
-
-bool Game::setupAudioSources() {
-
-    // Set the properties of our audio source(s) to match that of our audio stream
-    AudioProperties targetProperties {
-            .channelCount = mAudioStream->getChannelCount(),
-            .sampleRate = mAudioStream->getSampleRate()
-    };
-
-    // Create a data source and player for the clap sound
-    std::shared_ptr<AAssetDataSource> mClapSource {
-            AAssetDataSource::newFromCompressedAsset(mAssetManager, kClapFilename, targetProperties)
-    };
-    if (mClapSource == nullptr){
-        LOGE("Could not load source data for clap sound");
-        return false;
-    }
-    mClap = std::make_unique<Player>(mClapSource);
-
-    // Create a data source and player for our backing track
-    std::shared_ptr<AAssetDataSource> backingTrackSource {
-            AAssetDataSource::newFromCompressedAsset(mAssetManager, kBackingTrackFilename, targetProperties)
-    };
-    if (backingTrackSource == nullptr){
-        LOGE("Could not load source data for backing track");
-        return false;
-    }
-    mBackingTrack = std::make_unique<Player>(backingTrackSource);
-    mBackingTrack->setPlaying(true);
-    mBackingTrack->setLooping(true);
-
-    // Add both players to a mixer
-    mMixer.addTrack(mClap.get());
-    mMixer.addTrack(mBackingTrack.get());
-
-    return true;
-}
-
-void Game::scheduleSongEvents() {
-
-    for (auto t : kClapEvents) mClapEvents.push(t);
-    for (auto t : kClapWindows) mClapWindows.push(t);
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/Game.h b/externals/oboe/samples/RhythmGame/src/main/cpp/Game.h
deleted file mode 100644
index d9cb2ef7f0..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/Game.h
+++ /dev/null
@@ -1,85 +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 RHYTHMGAME_GAME_H
-#define RHYTHMGAME_GAME_H
-
-#include <future>
-
-#include <android/asset_manager.h>
-#include <oboe/Oboe.h>
-
-#include "shared/Mixer.h"
-
-#include "audio/Player.h"
-#include "audio/AAssetDataSource.h"
-#include "ui/OpenGLFunctions.h"
-#include "utils/LockFreeQueue.h"
-#include "utils/UtilityFunctions.h"
-#include "GameConstants.h"
-
-using namespace oboe;
-
-
-enum class GameState {
-    Loading,
-    Playing,
-    FailedToLoad
-};
-
-class Game : public AudioStreamDataCallback, AudioStreamErrorCallback {
-public:
-    explicit Game(AAssetManager&);
-    void start();
-    void stop();
-    void onSurfaceCreated();
-    void onSurfaceDestroyed();
-    void onSurfaceChanged(int widthInPixels, int heightInPixels);
-    void tick();
-    void tap(int64_t eventTimeAsUptime);
-
-    // Inherited from oboe::AudioStreamDataCallback.
-    DataCallbackResult
-    onAudioReady(AudioStream *oboeStream, void *audioData, int32_t numFrames) override;
-
-    // Inherited from oboe::AudioStreamErrorCallback.
-    void onErrorAfterClose(AudioStream *oboeStream, Result error) override;
-
-private:
-    AAssetManager& mAssetManager;
-    std::shared_ptr<AudioStream> mAudioStream;
-    std::unique_ptr<Player> mClap;
-    std::unique_ptr<Player> mBackingTrack;
-    Mixer mMixer;
-
-    LockFreeQueue<int64_t, kMaxQueueItems> mClapEvents;
-    std::atomic<int64_t> mCurrentFrame { 0 };
-    std::atomic<int64_t> mSongPositionMs { 0 };
-    LockFreeQueue<int64_t, kMaxQueueItems> mClapWindows;
-    LockFreeQueue<TapResult, kMaxQueueItems> mUiEvents;
-    std::atomic<int64_t> mLastUpdateTime { 0 };
-    std::atomic<GameState> mGameState { GameState::Loading };
-    std::future<void> mLoadingResult;
-
-    void load();
-    TapResult getTapResult(int64_t tapTimeInMillis, int64_t tapWindowInMillis);
-    bool openStream();
-    bool setupAudioSources();
-    void scheduleSongEvents();
-};
-
-
-#endif //RHYTHMGAME_GAME_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/GameConstants.h b/externals/oboe/samples/RhythmGame/src/main/cpp/GameConstants.h
deleted file mode 100644
index 288159279e..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/GameConstants.h
+++ /dev/null
@@ -1,60 +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 SAMPLES_GAMECONSTANTS_H
-#define SAMPLES_GAMECONSTANTS_H
-
-#include "ui/OpenGLFunctions.h"
-
-constexpr int kBufferSizeInBursts = 2; // Use 2 bursts as the buffer size (double buffer)
-constexpr int kMaxQueueItems = 4; // Must be power of 2
-
-// Colors for game states and visual feedback for taps
-constexpr ScreenColor kPlayingColor = GREY;
-constexpr ScreenColor kLoadingColor = YELLOW;
-constexpr ScreenColor kLoadingFailedColor = RED;
-constexpr ScreenColor kTapSuccessColor = GREEN;
-constexpr ScreenColor kTapEarlyColor = ORANGE;
-constexpr ScreenColor kTapLateColor = PURPLE;
-
-// This defines the size of the tap window in milliseconds. For example, if defined at 100ms the
-// player will have 100ms before and after the centre of the tap window to tap on the screen and
-// be successful
-constexpr int kWindowCenterOffsetMs = 100;
-
-// Filename for clap sound asset (in assets folder)
-constexpr char kClapFilename[] { "CLAP.mp3" };
-
-// Filename for the backing track asset (in assets folder)
-constexpr char kBackingTrackFilename[] { "FUNKY_HOUSE.mp3" };
-
-// The game will first demonstrate the pattern which the user should copy. It does this by
-// "clapping" (playing a clap sound) at certain times during the song. We can specify these times
-// here in milliseconds. Our backing track has a tempo of 120 beats per minute, which is 2 beats per
-// second. This means a pattern of 3 claps starting on the first beat of the first bar would mean
-// playing claps at 0ms, 500ms and 1000ms
-constexpr int64_t kClapEvents[] { 0, 500, 1000 };
-
-// We then want the user to tap on the screen exactly 4 beats after the first clap so we add clap
-// windows at 2000ms, 2500ms and 3000ms (or 2, 2.5 and 3 seconds). @see getTapResult for more info.
-constexpr int64_t kClapWindows[] { 2000, 2500, 3000 };
-
-struct AudioProperties {
-    int32_t channelCount;
-    int32_t sampleRate;
-};
-
-#endif //SAMPLES_GAMECONSTANTS_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.cpp
deleted file mode 100644
index 1c697878c2..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.cpp
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Copyright (C) 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.
- */
-
-
-#include <utils/logging.h>
-#include <oboe/Oboe.h>
-
-#include "AAssetDataSource.h"
-
-#if !defined(USE_FFMPEG)
-#error USE_FFMPEG should be defined in app.gradle
-#endif
-
-#if USE_FFMPEG==1
-#include "FFMpegExtractor.h"
-#else
-#include "NDKExtractor.h"
-#endif
-
-
-constexpr int kMaxCompressionRatio { 12 };
-
-AAssetDataSource* AAssetDataSource::newFromCompressedAsset(
-        AAssetManager &assetManager,
-        const char *filename,
-        const AudioProperties targetProperties) {
-
-    AAsset *asset = AAssetManager_open(&assetManager, filename, AASSET_MODE_UNKNOWN);
-    if (!asset) {
-        LOGE("Failed to open asset %s", filename);
-        return nullptr;
-    }
-
-    off_t assetSize = AAsset_getLength(asset);
-    LOGD("Opened %s, size %ld", filename, assetSize);
-
-    // Allocate memory to store the decompressed audio. We don't know the exact
-    // size of the decoded data until after decoding so we make an assumption about the
-    // maximum compression ratio and the decoded sample format (float for FFmpeg, int16 for NDK).
-#if USE_FFMPEG==true
-    const long maximumDataSizeInBytes = kMaxCompressionRatio * assetSize * sizeof(float);
-    auto decodedData = new uint8_t[maximumDataSizeInBytes];
-
-    int64_t bytesDecoded = FFMpegExtractor::decode(asset, decodedData, targetProperties);
-    auto numSamples = bytesDecoded / sizeof(float);
-#else
-    const long maximumDataSizeInBytes = kMaxCompressionRatio * assetSize * sizeof(int16_t);
-    auto decodedData = new uint8_t[maximumDataSizeInBytes];
-
-    int64_t bytesDecoded = NDKExtractor::decode(asset, decodedData, targetProperties);
-    auto numSamples = bytesDecoded / sizeof(int16_t);
-#endif
-
-    // Now we know the exact number of samples we can create a float array to hold the audio data
-    auto outputBuffer = std::make_unique<float[]>(numSamples);
-
-#if USE_FFMPEG==1
-    memcpy(outputBuffer.get(), decodedData, (size_t)bytesDecoded);
-#else
-    // The NDK decoder can only decode to int16, we need to convert to floats
-    oboe::convertPcm16ToFloat(
-            reinterpret_cast<int16_t*>(decodedData),
-            outputBuffer.get(),
-            bytesDecoded / sizeof(int16_t));
-#endif
-
-    delete[] decodedData;
-    AAsset_close(asset);
-
-    return new AAssetDataSource(std::move(outputBuffer),
-            numSamples,
-            targetProperties);
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.h b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.h
deleted file mode 100644
index cbcb433a34..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright (C) 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 RHYTHMGAME_AASSETDATASOURCE_H
-#define RHYTHMGAME_AASSETDATASOURCE_H
-
-#include <android/asset_manager.h>
-#include <GameConstants.h>
-#include "DataSource.h"
-
-class AAssetDataSource : public DataSource {
-
-public:
-    int64_t getSize() const override { return mBufferSize; }
-    AudioProperties getProperties() const override { return mProperties; }
-    const float* getData() const override { return mBuffer.get(); }
-
-    static AAssetDataSource* newFromCompressedAsset(
-            AAssetManager &assetManager,
-            const char *filename,
-            AudioProperties targetProperties);
-
-private:
-
-    AAssetDataSource(std::unique_ptr<float[]> data, size_t size,
-                     const AudioProperties properties)
-            : mBuffer(std::move(data))
-            , mBufferSize(size)
-            , mProperties(properties) {
-    }
-
-    const std::unique_ptr<float[]> mBuffer;
-    const int64_t mBufferSize;
-    const AudioProperties mProperties;
-
-};
-#endif //RHYTHMGAME_AASSETDATASOURCE_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/DataSource.h b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/DataSource.h
deleted file mode 100644
index 90284536bb..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/DataSource.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 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 RHYTHMGAME_AUDIOSOURCE_H
-#define RHYTHMGAME_AUDIOSOURCE_H
-
-#include <cstdint>
-#include <GameConstants.h>
-
-class DataSource {
-public:
-    virtual ~DataSource(){};
-    virtual int64_t getSize() const = 0;
-    virtual AudioProperties getProperties() const  = 0;
-    virtual const float* getData() const = 0;
-};
-
-
-#endif //RHYTHMGAME_AUDIOSOURCE_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/FFMpegExtractor.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/FFMpegExtractor.cpp
deleted file mode 100644
index 97d212f369..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/FFMpegExtractor.cpp
+++ /dev/null
@@ -1,318 +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.
- */
-
-#include <memory>
-#include <oboe/Definitions.h>
-#include "FFMpegExtractor.h"
-#include "utils/logging.h"
-
-constexpr int kInternalBufferSize = 1152; // Use MP3 block size. https://wiki.hydrogenaud.io/index.php?title=MP3
-
-int read(void *opaque, uint8_t *buf, int buf_size) {
-
-    auto asset = (AAsset *) opaque;
-    int bytesRead = AAsset_read(asset, buf, (size_t)buf_size);
-    return bytesRead;
-}
-
-int64_t seek(void *opaque, int64_t offset, int whence){
-
-    auto asset = (AAsset*)opaque;
-
-    // See https://www.ffmpeg.org/doxygen/3.0/avio_8h.html#a427ff2a881637b47ee7d7f9e368be63f
-    if (whence == AVSEEK_SIZE) return AAsset_getLength(asset);
-    if (AAsset_seek(asset, offset, whence) == -1){
-        return -1;
-    } else {
-        return 0;
-    }
-}
-
-bool FFMpegExtractor::createAVIOContext(AAsset *asset, uint8_t *buffer, uint32_t bufferSize,
-                                        AVIOContext **avioContext) {
-
-    constexpr int isBufferWriteable = 0;
-
-    *avioContext = avio_alloc_context(
-            buffer, // internal buffer for FFmpeg to use
-            bufferSize, // For optimal decoding speed this should be the protocol block size
-            isBufferWriteable,
-            asset, // Will be passed to our callback functions as a (void *)
-            read, // Read callback function
-            nullptr, // Write callback function (not used)
-            seek); // Seek callback function
-
-    if (*avioContext == nullptr){
-        LOGE("Failed to create AVIO context");
-        return false;
-    } else {
-        return true;
-    }
-}
-
-bool
-FFMpegExtractor::createAVFormatContext(AVIOContext *avioContext, AVFormatContext **avFormatContext) {
-
-    *avFormatContext = avformat_alloc_context();
-    (*avFormatContext)->pb = avioContext;
-
-    if (*avFormatContext == nullptr){
-        LOGE("Failed to create AVFormatContext");
-        return false;
-    } else {
-        return true;
-    }
-}
-
-bool FFMpegExtractor::openAVFormatContext(AVFormatContext *avFormatContext) {
-
-    int result = avformat_open_input(&avFormatContext,
-                                     "", /* URL is left empty because we're providing our own I/O */
-                                     nullptr /* AVInputFormat *fmt */,
-                                     nullptr /* AVDictionary **options */
-    );
-
-    if (result == 0) {
-        return true;
-    } else {
-        LOGE("Failed to open file. Error code %s", av_err2str(result));
-        return false;
-    }
-}
-
-bool FFMpegExtractor::getStreamInfo(AVFormatContext *avFormatContext) {
-
-    int result = avformat_find_stream_info(avFormatContext, nullptr);
-    if (result == 0 ){
-        return true;
-    } else {
-        LOGE("Failed to find stream info. Error code %s", av_err2str(result));
-        return false;
-    }
-}
-
-AVStream *FFMpegExtractor::getBestAudioStream(AVFormatContext *avFormatContext) {
-    
-    int streamIndex = av_find_best_stream(avFormatContext, AVMEDIA_TYPE_AUDIO, -1, -1, nullptr, 0);
-
-    if (streamIndex < 0){
-        LOGE("Could not find stream");
-        return nullptr;
-    } else {
-        return avFormatContext->streams[streamIndex];
-    }
-}
-
-int64_t FFMpegExtractor::decode(
-        AAsset *asset,
-        uint8_t *targetData,
-        AudioProperties targetProperties) {
-
-    LOGI("Decoder: FFMpeg");
-
-    int returnValue = -1; // -1 indicates error
-
-    // Create a buffer for FFmpeg to use for decoding (freed in the custom deleter below)
-    auto buffer = reinterpret_cast<uint8_t*>(av_malloc(kInternalBufferSize));
-
-    // Create an AVIOContext with a custom deleter
-    std::unique_ptr<AVIOContext, void(*)(AVIOContext *)> ioContext {
-            nullptr,
-            [](AVIOContext *c) {
-                av_free(c->buffer);
-                avio_context_free(&c);
-            }
-    };
-    {
-        AVIOContext *tmp = nullptr;
-        if (!createAVIOContext(asset, buffer, kInternalBufferSize, &tmp)){
-            LOGE("Could not create an AVIOContext");
-            return returnValue;
-        }
-        ioContext.reset(tmp);
-    }
-
-    // Create an AVFormatContext using the avformat_free_context as the deleter function
-    std::unique_ptr<AVFormatContext, decltype(&avformat_free_context)> formatContext {
-            nullptr,
-            &avformat_free_context
-    };
-    {
-        AVFormatContext *tmp;
-        if (!createAVFormatContext(ioContext.get(), &tmp)) return returnValue;
-        formatContext.reset(tmp);
-    }
-
-    if (!openAVFormatContext(formatContext.get())) return returnValue;
-
-    if (!getStreamInfo(formatContext.get())) return returnValue;
-
-    // Obtain the best audio stream to decode
-    AVStream *stream = getBestAudioStream(formatContext.get());
-    if (stream == nullptr || stream->codecpar == nullptr){
-        LOGE("Could not find a suitable audio stream to decode");
-        return returnValue;
-    }
-
-    printCodecParameters(stream->codecpar);
-
-    // Find the codec to decode this stream
-    AVCodec *codec = avcodec_find_decoder(stream->codecpar->codec_id);
-    if (!codec){
-        LOGE("Could not find codec with ID: %d", stream->codecpar->codec_id);
-        return returnValue;
-    }
-
-    // Create the codec context, specifying the deleter function
-    std::unique_ptr<AVCodecContext, void(*)(AVCodecContext *)> codecContext {
-            nullptr,
-            [](AVCodecContext *c) { avcodec_free_context(&c); }
-    };
-    {
-        AVCodecContext *tmp = avcodec_alloc_context3(codec);
-        if (!tmp){
-            LOGE("Failed to allocate codec context");
-            return returnValue;
-        }
-        codecContext.reset(tmp);
-    }
-
-    // Copy the codec parameters into the context
-    if (avcodec_parameters_to_context(codecContext.get(), stream->codecpar) < 0){
-        LOGE("Failed to copy codec parameters to codec context");
-        return returnValue;
-    }
-
-    // Open the codec
-    if (avcodec_open2(codecContext.get(), codec, nullptr) < 0){
-        LOGE("Could not open codec");
-        return returnValue;
-    }
-
-    // prepare resampler
-    int32_t outChannelLayout = (1 << targetProperties.channelCount) - 1;
-    LOGD("Channel layout %d", outChannelLayout);
-
-    SwrContext *swr = swr_alloc();
-    av_opt_set_int(swr, "in_channel_count", stream->codecpar->channels, 0);
-    av_opt_set_int(swr, "out_channel_count", targetProperties.channelCount, 0);
-    av_opt_set_int(swr, "in_channel_layout", stream->codecpar->channel_layout, 0);
-    av_opt_set_int(swr, "out_channel_layout", outChannelLayout, 0);
-    av_opt_set_int(swr, "in_sample_rate", stream->codecpar->sample_rate, 0);
-    av_opt_set_int(swr, "out_sample_rate", targetProperties.sampleRate, 0);
-    av_opt_set_int(swr, "in_sample_fmt", stream->codecpar->format, 0);
-    av_opt_set_sample_fmt(swr, "out_sample_fmt", AV_SAMPLE_FMT_FLT, 0);
-    av_opt_set_int(swr, "force_resampling", 1, 0);
-
-    // Check that resampler has been inited
-    int result = swr_init(swr);
-    if (result != 0){
-        LOGE("swr_init failed. Error: %s", av_err2str(result));
-        return returnValue;
-    };
-    if (!swr_is_initialized(swr)) {
-        LOGE("swr_is_initialized is false\n");
-        return returnValue;
-    }
-
-    // Prepare to read data
-    int bytesWritten = 0;
-    AVPacket avPacket; // Stores compressed audio data
-    av_init_packet(&avPacket);
-    AVFrame *decodedFrame = av_frame_alloc(); // Stores raw audio data
-    int bytesPerSample = av_get_bytes_per_sample((AVSampleFormat)stream->codecpar->format);
-
-    LOGD("Bytes per sample %d", bytesPerSample);
-
-    LOGD("DECODE START");
-
-    // While there is more data to read, read it into the avPacket
-    while (av_read_frame(formatContext.get(), &avPacket) == 0){
-
-        if (avPacket.stream_index == stream->index && avPacket.size > 0) {
-
-            // Pass our compressed data into the codec
-            result = avcodec_send_packet(codecContext.get(), &avPacket);
-            if (result != 0) {
-                LOGE("avcodec_send_packet error: %s", av_err2str(result));
-                goto cleanup;
-            }
-
-            // Retrieve our raw data from the codec
-            result = avcodec_receive_frame(codecContext.get(), decodedFrame);
-            if (result == AVERROR(EAGAIN)) {
-                // The codec needs more data before it can decode
-                LOGI("avcodec_receive_frame returned EAGAIN");
-                av_packet_unref(&avPacket);
-                continue;
-            } else if (result != 0) {
-                LOGE("avcodec_receive_frame error: %s", av_err2str(result));
-                goto cleanup;
-            }
-
-            // DO RESAMPLING
-            auto dst_nb_samples = (int32_t) av_rescale_rnd(
-                    swr_get_delay(swr, decodedFrame->sample_rate) + decodedFrame->nb_samples,
-                    targetProperties.sampleRate,
-                    decodedFrame->sample_rate,
-                    AV_ROUND_UP);
-
-            short *buffer1;
-            av_samples_alloc(
-                    (uint8_t **) &buffer1,
-                    nullptr,
-                    targetProperties.channelCount,
-                    dst_nb_samples,
-                    AV_SAMPLE_FMT_FLT,
-                    0);
-            int frame_count = swr_convert(
-                    swr,
-                    (uint8_t **) &buffer1,
-                    dst_nb_samples,
-                    (const uint8_t **) decodedFrame->data,
-                    decodedFrame->nb_samples);
-
-            int64_t bytesToWrite = frame_count * sizeof(float) * targetProperties.channelCount;
-            memcpy(targetData + bytesWritten, buffer1, (size_t)bytesToWrite);
-            bytesWritten += bytesToWrite;
-            av_freep(&buffer1);
-
-            av_packet_unref(&avPacket);
-        }
-    }
-
-    av_frame_free(&decodedFrame);
-    LOGD("DECODE END");
-
-    returnValue = bytesWritten;
-
-    cleanup:
-    return returnValue;
-}
-
-void FFMpegExtractor::printCodecParameters(AVCodecParameters *params) {
-
-    LOGD("Stream properties");
-    LOGD("Channels: %d", params->channels);
-    LOGD("Channel layout: %" PRId64, params->channel_layout);
-    LOGD("Sample rate: %d", params->sample_rate);
-    LOGD("Format: %s", av_get_sample_fmt_name((AVSampleFormat)params->format));
-    LOGD("Frame size: %d", params->frame_size);
-}
-
-
-
-
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/FFMpegExtractor.h b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/FFMpegExtractor.h
deleted file mode 100644
index a439b37c0a..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/FFMpegExtractor.h
+++ /dev/null
@@ -1,55 +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 FFMPEG_FFMPEGEXTRACTOR_H
-#define FFMPEG_FFMPEGEXTRACTOR_H
-
-
-extern "C" {
-#include <libavformat/avformat.h>
-#include <libswresample/swresample.h>
-#include <libavutil/opt.h>
-}
-
-#include <cstdint>
-#include <android/asset_manager.h>
-#include <GameConstants.h>
-
-class FFMpegExtractor {
-public:
-    static int64_t decode(AAsset *asset, uint8_t *targetData, AudioProperties targetProperties);
-
-private:
-    static bool createAVIOContext(AAsset *asset, uint8_t *buffer, uint32_t bufferSize,
-                                  AVIOContext **avioContext);
-
-    static bool createAVFormatContext(AVIOContext *avioContext, AVFormatContext **avFormatContext);
-
-    static bool openAVFormatContext(AVFormatContext *avFormatContext);
-
-    static int32_t cleanup(AVIOContext *avioContext, AVFormatContext *avFormatContext);
-
-    static bool getStreamInfo(AVFormatContext *avFormatContext);
-
-    static AVStream *getBestAudioStream(AVFormatContext *avFormatContext);
-
-    static AVCodec *findCodec(AVCodecID id);
-
-    static void printCodecParameters(AVCodecParameters *params);
-};
-
-
-#endif //FFMPEG_FFMPEGEXTRACTOR_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/NDKExtractor.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/NDKExtractor.cpp
deleted file mode 100644
index ac50940d91..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/NDKExtractor.cpp
+++ /dev/null
@@ -1,199 +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.
- */
-
-#include <sys/types.h>
-
-#include <cstring>
-
-#include <media/NdkMediaExtractor.h>
-#include <utils/logging.h>
-#include <cinttypes>
-
-#include "NDKExtractor.h"
-
-int32_t NDKExtractor::decode(AAsset *asset, uint8_t *targetData, AudioProperties targetProperties) {
-
-    LOGD("Using NDK decoder");
-
-    // open asset as file descriptor
-    off_t start, length;
-    int fd = AAsset_openFileDescriptor(asset, &start, &length);
-
-    // Extract the audio frames
-    AMediaExtractor *extractor = AMediaExtractor_new();
-    media_status_t amresult = AMediaExtractor_setDataSourceFd(extractor, fd,
-                                                              static_cast<off64_t>(start),
-                                                              static_cast<off64_t>(length));
-    if (amresult != AMEDIA_OK){
-        LOGE("Error setting extractor data source, err %d", amresult);
-        return 0;
-    }
-
-    // Specify our desired output format by creating it from our source
-    AMediaFormat *format = AMediaExtractor_getTrackFormat(extractor, 0);
-
-    int32_t sampleRate;
-    if (AMediaFormat_getInt32(format, AMEDIAFORMAT_KEY_SAMPLE_RATE, &sampleRate)){
-        LOGD("Source sample rate %d", sampleRate);
-        if (sampleRate != targetProperties.sampleRate){
-            LOGE("Input (%d) and output (%d) sample rates do not match. "
-                 "NDK decoder does not support resampling.",
-                 sampleRate,
-                 targetProperties.sampleRate);
-            return 0;
-        }
-    } else {
-        LOGE("Failed to get sample rate");
-        return 0;
-    };
-
-    int32_t channelCount;
-    if (AMediaFormat_getInt32(format, AMEDIAFORMAT_KEY_CHANNEL_COUNT, &channelCount)){
-        LOGD("Got channel count %d", channelCount);
-        if (channelCount != targetProperties.channelCount){
-            LOGE("NDK decoder does not support different "
-                 "input (%d) and output (%d) channel counts",
-                 channelCount,
-                 targetProperties.channelCount);
-        }
-    } else {
-        LOGE("Failed to get channel count");
-        return 0;
-    }
-
-    const char *formatStr = AMediaFormat_toString(format);
-    LOGD("Output format %s", formatStr);
-
-    const char *mimeType;
-    if (AMediaFormat_getString(format, AMEDIAFORMAT_KEY_MIME, &mimeType)) {
-        LOGD("Got mime type %s", mimeType);
-    } else {
-        LOGE("Failed to get mime type");
-        return 0;
-    }
-
-    // Obtain the correct decoder
-    AMediaCodec *codec = nullptr;
-    AMediaExtractor_selectTrack(extractor, 0);
-    codec = AMediaCodec_createDecoderByType(mimeType);
-    AMediaCodec_configure(codec, format, nullptr, nullptr, 0);
-    AMediaCodec_start(codec);
-
-    // DECODE
-
-    bool isExtracting = true;
-    bool isDecoding = true;
-    int32_t bytesWritten = 0;
-
-    while(isExtracting || isDecoding){
-
-        if (isExtracting){
-
-            // Obtain the index of the next available input buffer
-            ssize_t inputIndex = AMediaCodec_dequeueInputBuffer(codec, 2000);
-            //LOGV("Got input buffer %d", inputIndex);
-
-            // The input index acts as a status if its negative
-            if (inputIndex < 0){
-                if (inputIndex == AMEDIACODEC_INFO_TRY_AGAIN_LATER){
-                    // LOGV("Codec.dequeueInputBuffer try again later");
-                } else {
-                    LOGE("Codec.dequeueInputBuffer unknown error status");
-                }
-            } else {
-
-                // Obtain the actual buffer and read the encoded data into it
-                size_t inputSize;
-                uint8_t *inputBuffer = AMediaCodec_getInputBuffer(codec, inputIndex, &inputSize);
-                //LOGV("Sample size is: %d", inputSize);
-
-                ssize_t sampleSize = AMediaExtractor_readSampleData(extractor, inputBuffer, inputSize);
-                auto presentationTimeUs = AMediaExtractor_getSampleTime(extractor);
-
-                if (sampleSize > 0){
-
-                    // Enqueue the encoded data
-                    AMediaCodec_queueInputBuffer(codec, inputIndex, 0, sampleSize,
-                                                 presentationTimeUs,
-                                                 0);
-                    AMediaExtractor_advance(extractor);
-
-                } else {
-                    LOGD("End of extractor data stream");
-                    isExtracting = false;
-
-                    // We need to tell the codec that we've reached the end of the stream
-                    AMediaCodec_queueInputBuffer(codec, inputIndex, 0, 0,
-                                                 presentationTimeUs,
-                                                 AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM);
-                }
-            }
-        }
-
-        if (isDecoding){
-            // Dequeue the decoded data
-            AMediaCodecBufferInfo info;
-            ssize_t outputIndex = AMediaCodec_dequeueOutputBuffer(codec, &info, 0);
-
-            if (outputIndex >= 0){
-
-                // Check whether this is set earlier
-                if (info.flags & AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM){
-                    LOGD("Reached end of decoding stream");
-                    isDecoding = false;
-                } 
-                
-                // Valid index, acquire buffer
-                size_t outputSize;
-                uint8_t *outputBuffer = AMediaCodec_getOutputBuffer(codec, outputIndex, &outputSize);
-
-                /*LOGV("Got output buffer index %d, buffer size: %d, info size: %d writing to pcm index %d",
-                     outputIndex,
-                     outputSize,
-                     info.size,
-                     m_writeIndex);*/
-
-                // copy the data out of the buffer
-                memcpy(targetData + bytesWritten, outputBuffer, info.size);
-                bytesWritten+=info.size;
-                AMediaCodec_releaseOutputBuffer(codec, outputIndex, false);
-            } else {
-
-                // The outputIndex doubles as a status return if its value is < 0
-                switch(outputIndex){
-                    case AMEDIACODEC_INFO_TRY_AGAIN_LATER:
-                        LOGD("dequeueOutputBuffer: try again later");
-                        break;
-                    case AMEDIACODEC_INFO_OUTPUT_BUFFERS_CHANGED:
-                        LOGD("dequeueOutputBuffer: output buffers changed");
-                        break;
-                    case AMEDIACODEC_INFO_OUTPUT_FORMAT_CHANGED:
-                        LOGD("dequeueOutputBuffer: output outputFormat changed");
-                        format = AMediaCodec_getOutputFormat(codec);
-                        LOGD("outputFormat changed to: %s", AMediaFormat_toString(format));
-                        break;
-                }
-            }
-        }
-    }
-
-    // Clean up
-    AMediaFormat_delete(format);
-    AMediaCodec_delete(codec);
-    AMediaExtractor_delete(extractor);
-
-    return bytesWritten;
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/NDKExtractor.h b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/NDKExtractor.h
deleted file mode 100644
index 0073f7262d..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/NDKExtractor.h
+++ /dev/null
@@ -1,33 +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 FFMPEG_NDKMEDIAEXTRACTOR_H
-#define FFMPEG_NDKMEDIAEXTRACTOR_H
-
-
-#include <cstdint>
-#include <android/asset_manager.h>
-#include <GameConstants.h>
-
-
-class NDKExtractor {
-
-public:
-    static int32_t decode(AAsset *asset, uint8_t *targetData, AudioProperties targetProperties);
-};
-
-
-#endif //FFMPEG_NDKMEDIAEXTRACTOR_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.cpp
deleted file mode 100644
index e73a9c351a..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.cpp
+++ /dev/null
@@ -1,59 +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.
- */
-
-#include "Player.h"
-#include "utils/logging.h"
-
-void Player::renderAudio(float *targetData, int32_t numFrames){
-
-    const AudioProperties properties = mSource->getProperties();
-
-    if (mIsPlaying){
-
-        int64_t framesToRenderFromData = numFrames;
-        int64_t totalSourceFrames = mSource->getSize() / properties.channelCount;
-        const float *data = mSource->getData();
-
-        // Check whether we're about to reach the end of the recording
-        if (!mIsLooping && mReadFrameIndex + numFrames >= totalSourceFrames){
-            framesToRenderFromData = totalSourceFrames - mReadFrameIndex;
-            mIsPlaying = false;
-        }
-
-        for (int i = 0; i < framesToRenderFromData; ++i) {
-            for (int j = 0; j < properties.channelCount; ++j) {
-                targetData[(i*properties.channelCount)+j] = data[(mReadFrameIndex*properties.channelCount)+j];
-            }
-
-            // Increment and handle wraparound
-            if (++mReadFrameIndex >= totalSourceFrames) mReadFrameIndex = 0;
-        }
-
-        if (framesToRenderFromData < numFrames){
-            // fill the rest of the buffer with silence
-            renderSilence(&targetData[framesToRenderFromData], numFrames * properties.channelCount);
-        }
-
-    } else {
-        renderSilence(targetData, numFrames * properties.channelCount);
-    }
-}
-
-void Player::renderSilence(float *start, int32_t numSamples){
-    for (int i = 0; i < numSamples; ++i) {
-        start[i] = 0;
-    }
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.h b/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.h
deleted file mode 100644
index 9c7eebace2..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/audio/Player.h
+++ /dev/null
@@ -1,60 +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 RHYTHMGAME_SOUNDRECORDING_H
-#define RHYTHMGAME_SOUNDRECORDING_H
-
-#include <cstdint>
-#include <array>
-
-#include <chrono>
-#include <memory>
-#include <atomic>
-
-#include <android/asset_manager.h>
-
-#include "shared/IRenderableAudio.h"
-#include "DataSource.h"
-
-class Player : public IRenderableAudio{
-
-public:
-    /**
-     * Construct a new Player from the given DataSource. Players can share the same data source.
-     * For example, you could play two identical sounds concurrently by creating 2 Players with the
-     * same data source.
-     *
-     * @param source
-     */
-    Player(std::shared_ptr<DataSource> source)
-        : mSource(source)
-    {};
-
-    void renderAudio(float *targetData, int32_t numFrames);
-    void resetPlayHead() { mReadFrameIndex = 0; };
-    void setPlaying(bool isPlaying) { mIsPlaying = isPlaying; resetPlayHead(); };
-    void setLooping(bool isLooping) { mIsLooping = isLooping; };
-
-private:
-    int32_t mReadFrameIndex = 0;
-    std::atomic<bool> mIsPlaying { false };
-    std::atomic<bool> mIsLooping { false };
-    std::shared_ptr<DataSource> mSource;
-
-    void renderSilence(float*, int32_t);
-};
-
-#endif //RHYTHMGAME_SOUNDRECORDING_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/native-lib.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/native-lib.cpp
deleted file mode 100644
index 456b64837d..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/native-lib.cpp
+++ /dev/null
@@ -1,93 +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.
- */
-#include <jni.h>
-#include <memory>
-
-#include <android/asset_manager_jni.h>
-
-#include "utils/logging.h"
-#include "Game.h"
-
-
-extern "C" {
-
-std::unique_ptr<Game> game;
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_MainActivity_native_1onStart(JNIEnv *env, jobject instance,
-                                                                     jobject jAssetManager) {
-
-    AAssetManager *assetManager = AAssetManager_fromJava(env, jAssetManager);
-    if (assetManager == nullptr) {
-        LOGE("Could not obtain the AAssetManager");
-        return;
-    }
-
-    game = std::make_unique<Game>(*assetManager);
-    game->start();
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_RendererWrapper_native_1onSurfaceCreated(JNIEnv *env,
-                                                                                jobject instance) {
-    game->onSurfaceCreated();
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_RendererWrapper_native_1onSurfaceChanged(JNIEnv *env,
-                                                                                jclass type,
-                                                                                jint width,
-                                                                                jint height) {
-    game->onSurfaceChanged(width, height);
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_RendererWrapper_native_1onDrawFrame(JNIEnv *env,
-                                                                           jclass type) {
-    game->tick();
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_GameSurfaceView_native_1onTouchInput(JNIEnv *env,
-                                                                            jclass type,
-                                                                            jint event_type,
-                                                                            jlong time_since_boot_ms,
-                                                                            jint pixel_x,
-                                                                            jint pixel_y) {
-    game->tap(time_since_boot_ms);
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_GameSurfaceView_native_1surfaceDestroyed__(JNIEnv *env,
-                                                                                  jclass type) {
-    game->onSurfaceDestroyed();
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_MainActivity_native_1onStop(JNIEnv *env, jobject instance) {
-
-    game->stop();
-}
-
-JNIEXPORT void JNICALL
-Java_com_google_oboe_samples_rhythmgame_MainActivity_native_1setDefaultStreamValues(JNIEnv *env,
-                                                                                  jclass type,
-                                                                                  jint sampleRate,
-                                                                                  jint framesPerBurst) {
-    oboe::DefaultStreamValues::SampleRate = (int32_t) sampleRate;
-    oboe::DefaultStreamValues::FramesPerBurst = (int32_t) framesPerBurst;
-}
-} // extern "C"
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/ui/OpenGLFunctions.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/ui/OpenGLFunctions.cpp
deleted file mode 100644
index 3662f6b217..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/ui/OpenGLFunctions.cpp
+++ /dev/null
@@ -1,33 +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.
- */
-
-#include "OpenGLFunctions.h"
-#include "utils/logging.h"
-
-void CheckOpenGLError(const char* stmt, const char* fname, int line)
-{
-  GLenum err = glGetError();
-  if (err != GL_NO_ERROR)
-  {
-    LOGW("OpenGL error %08x, at %s:%i - for %s\n", err, fname, line, stmt);
-    assert(false);
-  }
-}
-
-void SetGLScreenColor(ScreenColor color){
-  glClearColor(color.red, color.green, color.blue, color.alpha);
-  glClear(GL_COLOR_BUFFER_BIT);
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/ui/OpenGLFunctions.h b/externals/oboe/samples/RhythmGame/src/main/cpp/ui/OpenGLFunctions.h
deleted file mode 100644
index cd6ef2050f..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/ui/OpenGLFunctions.h
+++ /dev/null
@@ -1,58 +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 ANDROID_OGL_H
-#define ANDROID_OGL_H
-
-#include <assert.h>
-
-struct ScreenColor {
-    float red;
-    float green;
-    float blue;
-    float alpha;
-};
-
-constexpr ScreenColor RED { 1.0f, 0.0f, 0.0f, 1.0f };
-constexpr ScreenColor GREEN { 0.0f, 1.0f, 0.0f, 1.0f };
-constexpr ScreenColor BLUE { 0.0f, 0.0f, 1.0f, 1.0f };
-constexpr ScreenColor PURPLE { 1.0f, 0.0f, 1.0f, 1.0f };
-constexpr ScreenColor ORANGE { 1.0f, 0.5f, 0.0f, 1.0f };
-constexpr ScreenColor GREY { 0.3f, 0.3f, 0.3f, 0.3f };
-constexpr ScreenColor YELLOW { 1.0f, 1.0f, 0.0f, 1.0f };
-
-#ifdef GL3
-#include <GLES3/gl3.h>
-#elif GL3_2
-#include <GLES3/gl32.h>
-#else
-#include <GLES2/gl2.h>
-#include <GLES2/gl2ext.h>
-#endif
-
-void CheckOpenGLError(const char* stmt, const char* fname, int line);
-
-#ifndef NDEBUG
-#define GL_CHECK(stmt) \
-            stmt;\
-            CheckOpenGLError(#stmt, __FILE__, __LINE__);
-#else
-#define GL_CHECK(stmt) stmt
-#endif
-
-void SetGLScreenColor(ScreenColor color);
-
-#endif //ANDROID_OGL_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/LockFreeQueue.h b/externals/oboe/samples/RhythmGame/src/main/cpp/utils/LockFreeQueue.h
deleted file mode 100644
index fa9f7168bb..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/LockFreeQueue.h
+++ /dev/null
@@ -1,154 +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 RHYTHMGAME_LOCKFREEQUEUE_H
-#define RHYTHMGAME_LOCKFREEQUEUE_H
-
-#include <cstdint>
-#include <atomic>
-
-/**
- * A lock-free queue for single consumer, single producer. Not thread-safe when using multiple
- * consumers or producers.
- *
- * Example code:
- *
- * LockFreeQueue<int, 1024> myQueue;
- * int value = 123;
- * myQueue.push(value);
- * myQueue.pop(value);
- *
- * @tparam T - The item type
- * @tparam CAPACITY - Maximum number of items which can be held in the queue. Must be a power of 2.
- * Must be less than the maximum value permissible in INDEX_TYPE
- * @tparam INDEX_TYPE - The internal index type, defaults to uint32_t. Changing this will affect
- * the maximum capacity. Included for ease of unit testing because testing queue lengths of
- * UINT32_MAX can be time consuming and is not always possible.
- */
-
-template <typename T, uint32_t CAPACITY, typename INDEX_TYPE = uint32_t>
-class LockFreeQueue {
-public:
-
-    /**
-     * Implementation details:
-     *
-     * We have 2 counters: readCounter and writeCounter. Each will increment until it reaches
-     * INDEX_TYPE_MAX, then wrap to zero. Unsigned integer overflow is defined behaviour in C++.
-     *
-     * Each time we need to access our data array we call mask() which gives us the index into the
-     * array. This approach avoids having a "dead item" in the buffer to distinguish between full
-     * and empty states. It also allows us to have a size() method which is easily calculated.
-     *
-     * IMPORTANT: This implementation is only thread-safe with a single reader thread and a single
-     * writer thread. Have more than one of either will result in Bad Things™.
-     */
-
-    static constexpr bool isPowerOfTwo(uint32_t n) { return (n & (n - 1)) == 0; }
-    static_assert(isPowerOfTwo(CAPACITY), "Capacity must be a power of 2");
-    static_assert(std::is_unsigned<INDEX_TYPE>::value, "Index type must be unsigned");
-
-    /**
-     * Pop a value off the head of the queue
-     *
-     * @param val - element will be stored in this variable
-     * @return true if value was popped successfully, false if the queue is empty
-     */
-    bool pop(T &val) {
-        if (isEmpty()){
-            return false;
-        } else {
-            val = buffer[mask(readCounter)];
-            ++readCounter;
-            return true;
-        }
-    }
-
-    /**
-     * Add an item to the back of the queue
-     *
-     * @param item - The item to add
-     * @return true if item was added, false if the queue was full
-     */
-    bool push(const T& item) {
-        if (isFull()){
-            return false;
-        } else {
-            buffer[mask(writeCounter)] = item;
-            ++writeCounter;
-            return true;
-        }
-    }
-
-    /**
-     * Get the item at the front of the queue but do not remove it
-     *
-     * @param item - item will be stored in this variable
-     * @return true if item was stored, false if the queue was empty
-     */
-    bool peek(T &item) const {
-        if (isEmpty()){
-            return false;
-        } else {
-            item = buffer[mask(readCounter)];
-            return true;
-        }
-    }
-
-    /**
-     * Get the number of items in the queue
-     *
-     * @return number of items in the queue
-     */
-    INDEX_TYPE size() const {
-
-        /**
-         * This is worth some explanation:
-         *
-         * Whilst writeCounter is greater than readCounter the result of (write - read) will always
-         * be positive. Simple.
-         *
-         * But when writeCounter is equal to INDEX_TYPE_MAX (e.g. UINT32_MAX) the next push will
-         * wrap it around to zero, the start of the buffer, making writeCounter less than
-         * readCounter so the result of (write - read) will be negative.
-         *
-         * But because we're returning an unsigned type return value will be as follows:
-         *
-         * returnValue = INDEX_TYPE_MAX - (write - read)
-         *
-         * e.g. if write is 0, read is 150 and the INDEX_TYPE is uint8_t where the max value is
-         * 255 the return value will be (255 - (0 - 150)) = 105.
-         *
-         */
-        return writeCounter - readCounter;
-    };
-
-private:
-
-    bool isEmpty() const { return readCounter == writeCounter; }
-
-    bool isFull() const { return size() == CAPACITY; }
-
-    INDEX_TYPE mask(INDEX_TYPE n) const { return static_cast<INDEX_TYPE>(n & (CAPACITY - 1)); }
-
-    T buffer[CAPACITY];
-    std::atomic<INDEX_TYPE> writeCounter { 0 };
-    std::atomic<INDEX_TYPE> readCounter { 0 };
-
-};
-
-#endif //RHYTHMGAME_LOCKFREEQUEUE_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/UtilityFunctions.cpp b/externals/oboe/samples/RhythmGame/src/main/cpp/utils/UtilityFunctions.cpp
deleted file mode 100644
index 431f607374..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/UtilityFunctions.cpp
+++ /dev/null
@@ -1,40 +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.
- */
-
-#include <chrono>
-#include <ui/OpenGLFunctions.h>
-#include <GameConstants.h>
-#include "UtilityFunctions.h"
-#include "logging.h"
-
-int64_t nowUptimeMillis() {
-    using namespace std::chrono;
-    return duration_cast<milliseconds>(steady_clock::now().time_since_epoch()).count();
-}
-
-void renderEvent(TapResult r){
-    switch (r) {
-        case TapResult::Success:
-            SetGLScreenColor(kTapSuccessColor);
-            break;
-        case TapResult::Early:
-            SetGLScreenColor(kTapEarlyColor);
-            break;
-        case TapResult::Late:
-            SetGLScreenColor(kTapLateColor);
-            break;
-    }
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/UtilityFunctions.h b/externals/oboe/samples/RhythmGame/src/main/cpp/utils/UtilityFunctions.h
deleted file mode 100644
index 659cd109b9..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/UtilityFunctions.h
+++ /dev/null
@@ -1,42 +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 RHYTHMGAME_UTILITYFUNCTIONS_H
-#define RHYTHMGAME_UTILITYFUNCTIONS_H
-
-#include <stdint.h>
-
-constexpr int64_t kMillisecondsInSecond = 1000;
-constexpr int64_t kNanosecondsInMillisecond = 1000000;
-
-enum class TapResult {
-    Early,
-    Late,
-    Success
-};
-
-int64_t nowUptimeMillis();
-
-constexpr int64_t convertFramesToMillis(const int64_t frames, const int sampleRate){
-    return static_cast<int64_t>((static_cast<double>(frames)/ sampleRate) * kMillisecondsInSecond);
-}
-
-TapResult getTapResult(int64_t tapTimeInMillis, int64_t tapWindowInMillis);
-
-void renderEvent(TapResult r);
-
-
-#endif //RHYTHMGAME_UTILITYFUNCTIONS_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/logging.h b/externals/oboe/samples/RhythmGame/src/main/cpp/utils/logging.h
deleted file mode 100644
index cc04619805..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/cpp/utils/logging.h
+++ /dev/null
@@ -1,32 +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 ANDROID_LOGGING_H
-#define ANDROID_LOGGING_H
-
-#include <stdio.h>
-#include <android/log.h>
-#include <vector>
-
-#define APP_NAME "RhythmGame"
-#define LOGD(...) ((void)__android_log_print(ANDROID_LOG_DEBUG, APP_NAME, __VA_ARGS__))
-#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, APP_NAME, __VA_ARGS__))
-#define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN, APP_NAME, __VA_ARGS__))
-#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, APP_NAME, __VA_ARGS__))
-
-
-
-#endif //ANDROID_LOGGING_H
diff --git a/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/GameSurfaceView.java b/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/GameSurfaceView.java
deleted file mode 100644
index 4e132a3d5c..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/GameSurfaceView.java
+++ /dev/null
@@ -1,64 +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.
- */
-
-package com.google.oboe.samples.rhythmgame;
-
-import android.content.Context;
-import android.opengl.GLSurfaceView;
-import android.util.AttributeSet;
-import android.view.MotionEvent;
-import android.view.SurfaceHolder;
-
-public class GameSurfaceView extends GLSurfaceView {
-
-    public static native void native_onTouchInput(int eventType, long timeSinceBootMs, int pixel_x, int pixel_y);
-    public static native void native_surfaceDestroyed();
-    private final RendererWrapper mRenderer;
-
-    public GameSurfaceView(Context context) {
-        super(context);
-        setEGLContextClientVersion(2);
-        mRenderer = new RendererWrapper();
-        // Set the Renderer for drawing on the GLSurfaceView
-        setRenderer(mRenderer);
-    }
-
-    public GameSurfaceView(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        setEGLContextClientVersion(2);
-        mRenderer = new RendererWrapper();
-        // Set the Renderer for drawing on the GLSurfaceView
-        setRenderer(mRenderer);
-    }
-
-    @Override
-    public void surfaceDestroyed(SurfaceHolder holder) {
-        native_surfaceDestroyed();
-        super.surfaceDestroyed(holder);
-    }
-
-    @Override
-    public boolean onTouchEvent(MotionEvent e) {
-        // MotionEvent reports input details from the touch screen
-        // and other input controls. In our case we care about DOWN events.
-        switch (e.getAction()) {
-            case MotionEvent.ACTION_DOWN:
-                native_onTouchInput(0, e.getEventTime(), (int)e.getX(), (int)e.getY());
-                break;
-        }
-        return true;
-    }
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/MainActivity.java b/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/MainActivity.java
deleted file mode 100644
index d370641c67..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/MainActivity.java
+++ /dev/null
@@ -1,75 +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.
- */
-
-package com.google.oboe.samples.rhythmgame;
-
-import android.content.Context;
-import android.content.res.AssetManager;
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.media.AudioManager;
-import android.os.Build;
-import android.os.Bundle;
-import android.view.WindowManager;
-
-public class MainActivity extends AppCompatActivity {
-
-    // Used to load the 'native-lib' library on application startup.
-    static {
-        if (BuildConfig.FLAVOR == "ffmpegExtractor"){
-            System.loadLibrary("avutil");
-            System.loadLibrary("swresample");
-            System.loadLibrary("avcodec");
-            System.loadLibrary("avformat");
-        }
-        System.loadLibrary("native-lib");
-    }
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-        setDefaultStreamValues(this);
-    }
-
-    protected void onResume(){
-        super.onResume();
-        native_onStart(getAssets());
-    }
-
-    protected void onPause(){
-        native_onStop();
-        super.onPause();
-    }
-
-    static void setDefaultStreamValues(Context context) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
-            AudioManager myAudioMgr = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
-            String sampleRateStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
-            int defaultSampleRate = Integer.parseInt(sampleRateStr);
-            String framesPerBurstStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER);
-            int defaultFramesPerBurst = Integer.parseInt(framesPerBurstStr);
-
-            native_setDefaultStreamValues(defaultSampleRate, defaultFramesPerBurst);
-        }
-    }
-
-    private native void native_onStart(AssetManager assetManager);
-    private native void native_onStop();
-    private static native void native_setDefaultStreamValues(int defaultSampleRate,
-                                                      int defaultFramesPerBurst);
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/RendererWrapper.java b/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/RendererWrapper.java
deleted file mode 100644
index 93000f4ef1..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/java/com/google/oboe/samples/rhythmgame/RendererWrapper.java
+++ /dev/null
@@ -1,41 +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.
- */
-
-package com.google.oboe.samples.rhythmgame;
-
-import android.opengl.GLSurfaceView;
-import javax.microedition.khronos.egl.EGLConfig;
-import javax.microedition.khronos.opengles.GL10;
-
-public class RendererWrapper implements GLSurfaceView.Renderer {
-    public static native void native_onSurfaceCreated();
-    public static native void native_onSurfaceChanged(int widthInPixels, int heightInPixels);
-    public static native void native_onDrawFrame();
-    @Override
-    public void onSurfaceCreated(GL10 gl10, EGLConfig eglConfig) {
-        native_onSurfaceCreated();
-    }
-
-    @Override
-    public void onSurfaceChanged(GL10 gl10, int width, int height) {
-        native_onSurfaceChanged(width, height);
-    }
-
-    @Override
-    public void onDrawFrame(GL10 gl10) {
-        native_onDrawFrame();
-    }
-}
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/drawable-v24/ic_launcher_foreground.xml b/externals/oboe/samples/RhythmGame/src/main/res/drawable-v24/ic_launcher_foreground.xml
deleted file mode 100644
index c7bd21dbd8..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/drawable-v24/ic_launcher_foreground.xml
+++ /dev/null
@@ -1,34 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:aapt="http://schemas.android.com/aapt"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportHeight="108"
-    android:viewportWidth="108">
-    <path
-        android:fillType="evenOdd"
-        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1">
-        <aapt:attr name="android:fillColor">
-            <gradient
-                android:endX="78.5885"
-                android:endY="90.9159"
-                android:startX="48.7653"
-                android:startY="61.0927"
-                android:type="linear">
-                <item
-                    android:color="#44000000"
-                    android:offset="0.0" />
-                <item
-                    android:color="#00000000"
-                    android:offset="1.0" />
-            </gradient>
-        </aapt:attr>
-    </path>
-    <path
-        android:fillColor="#FFFFFF"
-        android:fillType="nonZero"
-        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1" />
-</vector>
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/drawable/ic_launcher_background.xml b/externals/oboe/samples/RhythmGame/src/main/res/drawable/ic_launcher_background.xml
deleted file mode 100644
index d5fccc538c..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/drawable/ic_launcher_background.xml
+++ /dev/null
@@ -1,170 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportHeight="108"
-    android:viewportWidth="108">
-    <path
-        android:fillColor="#26A69A"
-        android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeColor="#33FFFFFF"
-        android:strokeWidth="0.8" />
-</vector>
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/layout/activity_main.xml b/externals/oboe/samples/RhythmGame/src/main/res/layout/activity_main.xml
deleted file mode 100644
index dafd7afe89..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/layout/activity_main.xml
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context="com.google.oboe.samples.rhythmgame.MainActivity">
-
-    <com.google.oboe.samples.rhythmgame.GameSurfaceView
-        android:id="@+id/glSurfaceView"
-        android:layout_width="match_parent"
-        android:layout_centerHorizontal="true"
-        android:layout_centerVertical="true"
-        android:layout_marginBottom="0dp"
-        android:layout_marginEnd="0dp"
-        android:layout_marginStart="0dp"
-        android:layout_marginTop="0dp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        android:layout_height="match_parent" />
-
-    <TextView
-        android:id="@+id/instructionsBlock"
-        android:layout_width="294dp"
-        android:layout_height="159dp"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="16dp"
-        android:clickable="false"
-        android:ems="10"
-        android:focusable="false"
-        android:gravity="start|top"
-        android:inputType="textMultiLine"
-        android:text="See https://github.com/google/oboe/blob/main/samples/RhythmGame/README.md for instructions. There is a link to a codelab to follow along with."
-        android:textColor="#FFFFFF"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
deleted file mode 100644
index eca70cfe52..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>
\ No newline at end of file
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
deleted file mode 100644
index eca70cfe52..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>
\ No newline at end of file
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-hdpi/ic_launcher.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-hdpi/ic_launcher.png
deleted file mode 100644
index a2f5908281..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-hdpi/ic_launcher.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-hdpi/ic_launcher_round.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-hdpi/ic_launcher_round.png
deleted file mode 100644
index 1b52399808..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-hdpi/ic_launcher_round.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-mdpi/ic_launcher.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-mdpi/ic_launcher.png
deleted file mode 100644
index ff10afd6e1..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-mdpi/ic_launcher.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-mdpi/ic_launcher_round.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-mdpi/ic_launcher_round.png
deleted file mode 100644
index 115a4c768a..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-mdpi/ic_launcher_round.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xhdpi/ic_launcher.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xhdpi/ic_launcher.png
deleted file mode 100644
index dcd3cd8083..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xhdpi/ic_launcher.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xhdpi/ic_launcher_round.png
deleted file mode 100644
index 459ca609d3..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xhdpi/ic_launcher_round.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxhdpi/ic_launcher.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxhdpi/ic_launcher.png
deleted file mode 100644
index 8ca12fe024..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxhdpi/ic_launcher.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
deleted file mode 100644
index 8e19b410a1..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxxhdpi/ic_launcher.png
deleted file mode 100644
index b824ebdd48..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxxhdpi/ic_launcher.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
deleted file mode 100644
index 4c19a13c23..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
+++ /dev/null
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/values/colors.xml b/externals/oboe/samples/RhythmGame/src/main/res/values/colors.xml
deleted file mode 100644
index 3ab3e9cbce..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/values/colors.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="colorPrimary">#3F51B5</color>
-    <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
-</resources>
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/values/strings.xml b/externals/oboe/samples/RhythmGame/src/main/res/values/strings.xml
deleted file mode 100644
index da09510999..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/values/strings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<resources>
-    <string name="app_name">RhythmGame</string>
-</resources>
diff --git a/externals/oboe/samples/RhythmGame/src/main/res/values/styles.xml b/externals/oboe/samples/RhythmGame/src/main/res/values/styles.xml
deleted file mode 100644
index 5885930df6..0000000000
--- a/externals/oboe/samples/RhythmGame/src/main/res/values/styles.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<resources>
-
-    <!-- Base application theme. -->
-    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
-        <item name="colorPrimary">@color/colorPrimary</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
-        <item name="colorAccent">@color/colorAccent</item>
-    </style>
-
-</resources>