From 6c655321e6b04b8648802e296bb5ca11d290ae68 Mon Sep 17 00:00:00 2001
From: swurl <swurl@swurl.xyz>
Date: Sat, 31 May 2025 02:33:02 -0400
Subject: Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>
---
 .../iolib/src/main/cpp/player/SampleBuffer.cpp     | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 externals/oboe/samples/iolib/src/main/cpp/player/SampleBuffer.cpp

(limited to 'externals/oboe/samples/iolib/src/main/cpp/player/SampleBuffer.cpp')

diff --git a/externals/oboe/samples/iolib/src/main/cpp/player/SampleBuffer.cpp b/externals/oboe/samples/iolib/src/main/cpp/player/SampleBuffer.cpp
new file mode 100644
index 0000000000..f3694b3c00
--- /dev/null
+++ b/externals/oboe/samples/iolib/src/main/cpp/player/SampleBuffer.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "SampleBuffer.h"
+
+// Resampler Includes
+#include <resampler/MultiChannelResampler.h>
+
+#include "wav/WavStreamReader.h"
+
+using namespace RESAMPLER_OUTER_NAMESPACE::resampler;
+
+namespace iolib {
+
+void SampleBuffer::loadSampleData(parselib::WavStreamReader* reader) {
+    mAudioProperties.channelCount = reader->getNumChannels();
+    mAudioProperties.sampleRate = reader->getSampleRate();
+
+    reader->positionToAudio();
+
+    mNumSamples = reader->getNumSampleFrames() * reader->getNumChannels();
+    mSampleData = new float[mNumSamples];
+
+    reader->getDataFloat(mSampleData, reader->getNumSampleFrames());
+}
+
+void SampleBuffer::unloadSampleData() {
+    if (mSampleData != nullptr) {
+        delete[] mSampleData;
+        mSampleData = nullptr;
+    }
+    mNumSamples = 0;
+}
+
+class ResampleBlock {
+public:
+    int32_t mSampleRate;
+    float*  mBuffer;
+    int32_t mNumSamples;
+};
+
+void resampleData(const ResampleBlock& input, ResampleBlock* output, int numChannels) {
+    // Calculate output buffer size
+    double temp =
+            ((double)input.mNumSamples * (double)output->mSampleRate) / (double)input.mSampleRate;
+
+    // round up
+    int32_t numOutFramesAllocated = (int32_t)(temp + 0.5);
+    // We iterate thousands of times through the loop. Roundoff error could accumulate
+    // so add a few more frames for padding
+    numOutFramesAllocated += 8;
+
+    MultiChannelResampler *resampler = MultiChannelResampler::make(
+            numChannels, // channel count
+            input.mSampleRate, // input sampleRate
+            output->mSampleRate, // output sampleRate
+            MultiChannelResampler::Quality::Medium); // conversion quality
+
+    float *inputBuffer = input.mBuffer;;     // multi-channel buffer to be consumed
+    float *outputBuffer = new float[numOutFramesAllocated];    // multi-channel buffer to be filled
+    output->mBuffer = outputBuffer;
+
+    int numOutputSamples = 0;
+    int inputSamplesLeft = input.mNumSamples;
+    while ((inputSamplesLeft > 0) && (numOutputSamples < numOutFramesAllocated)) {
+        if(resampler->isWriteNeeded()) {
+            resampler->writeNextFrame(inputBuffer);
+            inputBuffer += numChannels;
+            inputSamplesLeft -= numChannels;
+        } else {
+            resampler->readNextFrame(outputBuffer);
+            outputBuffer += numChannels;
+            numOutputSamples += numChannels;
+        }
+    }
+    output->mNumSamples = numOutputSamples;
+
+    delete resampler;
+}
+
+void SampleBuffer::resampleData(int sampleRate) {
+    if (mAudioProperties.sampleRate == sampleRate) {
+        // nothing to do
+        return;
+    }
+
+    ResampleBlock inputBlock;
+    inputBlock.mBuffer = mSampleData;
+    inputBlock.mNumSamples = mNumSamples;
+    inputBlock.mSampleRate = mAudioProperties.sampleRate;
+
+    ResampleBlock outputBlock;
+    outputBlock.mSampleRate = sampleRate;
+    iolib::resampleData(inputBlock, &outputBlock, mAudioProperties.channelCount);
+
+    // delete previous samples
+    delete[] mSampleData;
+
+    // install the resampled data
+    mSampleData = outputBlock.mBuffer;
+    mNumSamples = outputBlock.mNumSamples;
+    mAudioProperties.sampleRate = outputBlock.mSampleRate;
+}
+
+} // namespace iolib
-- 
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