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>
---
 externals/oboe/src/fifo/FifoControllerBase.cpp | 68 ++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 externals/oboe/src/fifo/FifoControllerBase.cpp

(limited to 'externals/oboe/src/fifo/FifoControllerBase.cpp')

diff --git a/externals/oboe/src/fifo/FifoControllerBase.cpp b/externals/oboe/src/fifo/FifoControllerBase.cpp
new file mode 100644
index 0000000000..dc65b87d29
--- /dev/null
+++ b/externals/oboe/src/fifo/FifoControllerBase.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2015 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 <algorithm>
+#include <cassert>
+#include <stdint.h>
+
+#include "oboe/FifoControllerBase.h"
+
+namespace oboe {
+
+FifoControllerBase::FifoControllerBase(uint32_t capacityInFrames)
+        : mTotalFrames(capacityInFrames)
+{
+    // Avoid ridiculously large buffers and the arithmetic wraparound issues that can follow.
+    assert(capacityInFrames <= (UINT32_MAX / 4));
+}
+
+uint32_t FifoControllerBase::getFullFramesAvailable() const {
+    uint64_t writeCounter =  getWriteCounter();
+    uint64_t readCounter = getReadCounter();
+    if (readCounter > writeCounter) {
+        return 0;
+    }
+    uint64_t delta = writeCounter - readCounter;
+    if (delta >= mTotalFrames) {
+        return mTotalFrames;
+    }
+    // delta is now guaranteed to fit within the range of a uint32_t
+    return static_cast<uint32_t>(delta);
+}
+
+uint32_t FifoControllerBase::getReadIndex() const {
+    // % works with non-power of two sizes
+    return static_cast<uint32_t>(getReadCounter() % mTotalFrames);
+}
+
+void FifoControllerBase::advanceReadIndex(uint32_t numFrames) {
+    incrementReadCounter(numFrames);
+}
+
+uint32_t FifoControllerBase::getEmptyFramesAvailable() const {
+    return static_cast<uint32_t>(mTotalFrames - getFullFramesAvailable());
+}
+
+uint32_t FifoControllerBase::getWriteIndex() const {
+    // % works with non-power of two sizes
+    return static_cast<uint32_t>(getWriteCounter() % mTotalFrames);
+}
+
+void FifoControllerBase::advanceWriteIndex(uint32_t numFrames) {
+    incrementWriteCounter(numFrames);
+}
+
+} // namespace oboe
-- 
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