diff --git a/build/android/app/CMakeLists.txt b/build/android/app/CMakeLists.txt
index ee3e594..94345ef 100644
--- a/build/android/app/CMakeLists.txt
+++ b/build/android/app/CMakeLists.txt
@@ -49,6 +49,7 @@ project(kaliber)
 add_library(kaliber SHARED
     ../../../src/base/collusion_test.cc
     ../../../src/base/log.cc
+    ../../../src/base/mem.cc
     ../../../src/base/task_runner.cc
     ../../../src/base/thread_pool.cc
     ../../../src/demo/credits.cc
@@ -136,7 +137,6 @@ add_library(kaliber SHARED
     ../../../src/third_party/minizip/ioapi.c
     ../../../src/third_party/minizip/unzip.c
     ../../../src/third_party/spirv-reflect/spirv_reflect.c
-    ../../../src/third_party/stb/stb_image.c
     ../../../src/third_party/texture_compressor/dxt_encoder_internals.cc
     ../../../src/third_party/texture_compressor/dxt_encoder.cc
     ../../../src/third_party/texture_compressor/texture_compressor_etc1.cc
diff --git a/src/base/BUILD.gn b/src/base/BUILD.gn
index 38341ef..221cc9d 100644
--- a/src/base/BUILD.gn
+++ b/src/base/BUILD.gn
@@ -8,6 +8,7 @@ source_set("base") {
     "interpolation.h",
     "log.cc",
     "log.h",
+    "mem.cc",
     "mem.h",
     "misc.h",
     "random.h",
diff --git a/src/base/mem.cc b/src/base/mem.cc
new file mode 100644
index 0000000..4adfa51
--- /dev/null
+++ b/src/base/mem.cc
@@ -0,0 +1,46 @@
+#include "base/mem.h"
+
+#include <cstring>
+
+#if defined(__ANDROID__)
+#include <malloc.h>
+#endif
+
+namespace base {
+
+void* AlignedAlloc(size_t size, size_t alignment) {
+  DCHECK(size > 0U);
+  DCHECK(IsPow2(alignment));
+  DCHECK((alignment % sizeof(void*)) == 0U);
+
+  void* ptr = nullptr;
+#if defined(_WIN32)
+  ptr = _aligned_malloc(size, alignment);
+#elif defined(__ANDROID__)
+  ptr = memalign(alignment, size);
+#else
+  int ret = posix_memalign(&ptr, alignment, size);
+  if (ret != 0) {
+    DLOG(0) << "posix_memalign() returned with error " << ret;
+    ptr = nullptr;
+  }
+#endif
+
+  // Aligned allocations may fail for non-memory related reasons.
+  CHECK(ptr) << "Aligned allocation failed. "
+             << "size=" << size << ", alignment=" << alignment;
+  DCHECK(IsAligned(ptr, alignment));
+  return ptr;
+}
+
+void* AlignedRealloc(void* ptr,
+                     size_t old_size,
+                     size_t new_size,
+                     size_t alignment) {
+  auto* new_ptr = AlignedAlloc(new_size, alignment);
+  memmove(new_ptr, ptr, old_size);
+  AlignedFree(ptr);
+  return new_ptr;
+}
+
+}  // namespace base
diff --git a/src/base/mem.h b/src/base/mem.h
index 698a3fb..36bbafc 100644
--- a/src/base/mem.h
+++ b/src/base/mem.h
@@ -1,26 +1,33 @@
 #ifndef BASE_MEM_H
 #define BASE_MEM_H
 
-#include <cstdlib>
+#include <stddef.h>
+#include <stdint.h>
 #include <memory>
 
-#if defined(__ANDROID__)
+#if defined(_WIN32)
 #include <malloc.h>
+#else
+#include <stdlib.h>
 #endif
 
 #include "base/log.h"
-
-#define ALIGN_MEM(alignment) __attribute__((aligned(alignment)))
+#include "base/misc.h"
 
 namespace base {
 
+inline void AlignedFree(void* mem) {
+#if defined(_WIN32)
+  _aligned_free(mem);
+#else
+  free(mem);
+#endif
+}
+
 namespace internal {
 
 struct ScopedAlignedFree {
-  inline void operator()(void* x) const {
-    if (x)
-      free(x);
-  }
+  inline void operator()(void* x) const { AlignedFree(x); }
 };
 
 }  // namespace internal
@@ -28,27 +35,16 @@ struct ScopedAlignedFree {
 template <typename T>
 using AlignedMemPtr = std::unique_ptr<T, internal::ScopedAlignedFree>;
 
-template <int kAlignment>
-inline void* AlignedAlloc(size_t size) {
-  void* ptr = NULL;
-#if defined(__ANDROID__)
-  ptr = memalign(kAlignment, size);
-#else
-  if (posix_memalign(&ptr, kAlignment, size))
-    ptr = NULL;
-#endif
-  DCHECK(ptr);
-  // DCHECK(((unsigned)ptr & (kAlignment - 1)) == 0);
-  return ptr;
-}
+void* AlignedAlloc(size_t size, size_t alignment);
 
-inline void AlignedFree(void* mem) {
-  free(mem);
-}
+void* AlignedRealloc(void* ptr,
+                     size_t old_size,
+                     size_t new_size,
+                     size_t alignment);
 
-template <int kAlignment>
-inline bool IsAligned(void* ptr) {
-  return (reinterpret_cast<uintptr_t>(ptr) & (kAlignment - 1)) == 0U;
+inline bool IsAligned(const void* val, size_t alignment) {
+  DCHECK(IsPow2(alignment)) << alignment << " is not a power of 2";
+  return (reinterpret_cast<uintptr_t>(val) & (alignment - 1)) == 0;
 }
 
 }  // namespace base
diff --git a/src/engine/asset/image.cc b/src/engine/asset/image.cc
index f1ef622..dcf7f94 100644
--- a/src/engine/asset/image.cc
+++ b/src/engine/asset/image.cc
@@ -5,13 +5,19 @@
 
 #include "base/interpolation.h"
 #include "base/log.h"
+#include "base/mem.h"
 #include "base/misc.h"
 #include "engine/engine.h"
 #include "engine/platform/asset_file.h"
 #include "third_party/texture_compressor/texture_compressor.h"
 
-// This 3rd party library is written in C and uses malloc, which means that we
-// have to do the same.
+// Use aligned memory for SIMD in texture compressor.
+#define STB_IMAGE_IMPLEMENTATION
+#define STBI_NO_STDIO
+#define STBI_MALLOC(sz) base::AlignedAlloc(sz, 16)
+#define STBI_REALLOC_SIZED(p, oldsz, newsz) \
+  base::AlignedRealloc(p, oldsz, newsz, 16)
+#define STBI_FREE(p) base::AlignedFree(p)
 #include "third_party/stb/stb_image.h"
 
 using namespace base;
@@ -77,7 +83,7 @@ bool Image::Create(int w, int h) {
   width_ = w;
   height_ = h;
 
-  buffer_.reset((uint8_t*)AlignedAlloc<16>(w * h * 4 * sizeof(uint8_t)));
+  buffer_.reset((uint8_t*)AlignedAlloc(w * h * 4 * sizeof(uint8_t), 16));
 
   return true;
 }
@@ -85,7 +91,7 @@ bool Image::Create(int w, int h) {
 void Image::Copy(const Image& other) {
   if (other.buffer_) {
     int size = other.GetSize();
-    buffer_.reset((uint8_t*)AlignedAlloc<16>(size));
+    buffer_.reset((uint8_t*)AlignedAlloc(size, 16));
     memcpy(buffer_.get(), other.buffer_.get(), size);
   }
   width_ = other.width_;
@@ -101,7 +107,7 @@ bool Image::CreateMip(const Image& other) {
   width_ = std::max(other.width_ >> 1, 1);
   height_ = std::max(other.height_ >> 1, 1);
   format_ = kRGBA32;
-  buffer_.reset((uint8_t*)AlignedAlloc<16>(GetSize()));
+  buffer_.reset((uint8_t*)AlignedAlloc(GetSize(), 16));
 
   // If the width isn't perfectly divisable with two, then we end up skewing
   // the image because the source offset isn't updated properly.
@@ -158,7 +164,7 @@ bool Image::Load(const std::string& file_name) {
       // LOG(0)("Converting image from 1 to 4 channels.\n");
       // Assume it's an intensity, duplicate it to RGB and fill A with opaque.
       converted_buffer =
-          (uint8_t*)AlignedAlloc<16>(w * h * 4 * sizeof(uint8_t));
+          (uint8_t*)AlignedAlloc(w * h * 4 * sizeof(uint8_t), 16);
       for (int i = 0; i < w * h; ++i) {
         converted_buffer[i * 4 + 0] = buffer_[i];
         converted_buffer[i * 4 + 1] = buffer_[i];
@@ -171,7 +177,7 @@ bool Image::Load(const std::string& file_name) {
       // LOG(0)("Converting image from 3 to 4 channels.\n");
       // Add an opaque channel.
       converted_buffer =
-          (uint8_t*)AlignedAlloc<16>(w * h * 4 * sizeof(uint8_t));
+          (uint8_t*)AlignedAlloc(w * h * 4 * sizeof(uint8_t), 16);
       for (int i = 0; i < w * h; ++i) {
         converted_buffer[i * 4 + 0] = buffer_[i * 3 + 0];
         converted_buffer[i * 4 + 1] = buffer_[i * 3 + 1];
@@ -238,7 +244,7 @@ void Image::ConvertToPow2() {
            << new_width << ", " << new_height << ")";
 
     int bigger_size = new_width * new_height * 4 * sizeof(uint8_t);
-    uint8_t* bigger_buffer = (uint8_t*)AlignedAlloc<16>(bigger_size);
+    uint8_t* bigger_buffer = (uint8_t*)AlignedAlloc(bigger_size, 16);
 
     // Fill it with black.
     memset(bigger_buffer, 0, bigger_size);
@@ -296,7 +302,7 @@ bool Image::Compress() {
 
   unsigned compressedSize = GetSize();
   uint8_t* compressedBuffer =
-      (uint8_t*)AlignedAlloc<16>(compressedSize * sizeof(uint8_t));
+      (uint8_t*)AlignedAlloc(compressedSize * sizeof(uint8_t), 16);
 
   const uint8_t* src = buffer_.get();
   uint8_t* dst = compressedBuffer;
diff --git a/src/engine/audio/sinc_resampler.cc b/src/engine/audio/sinc_resampler.cc
index c8465db..0a0a303 100644
--- a/src/engine/audio/sinc_resampler.cc
+++ b/src/engine/audio/sinc_resampler.cc
@@ -192,13 +192,13 @@ SincResampler::SincResampler(double io_sample_rate_ratio, int request_frames)
       input_buffer_size_(request_frames_ + kernel_size_),
       // Create input buffers with a 32-byte alignment for SIMD optimizations.
       kernel_storage_(static_cast<float*>(
-          base::AlignedAlloc<32>(sizeof(float) * kernel_storage_size_))),
+          base::AlignedAlloc(sizeof(float) * kernel_storage_size_, 32))),
       kernel_pre_sinc_storage_(static_cast<float*>(
-          base::AlignedAlloc<32>(sizeof(float) * kernel_storage_size_))),
+          base::AlignedAlloc(sizeof(float) * kernel_storage_size_, 32))),
       kernel_window_storage_(static_cast<float*>(
-          base::AlignedAlloc<32>(sizeof(float) * kernel_storage_size_))),
+          base::AlignedAlloc(sizeof(float) * kernel_storage_size_, 32))),
       input_buffer_(static_cast<float*>(
-          base::AlignedAlloc<32>(sizeof(float) * input_buffer_size_))),
+          base::AlignedAlloc(sizeof(float) * input_buffer_size_, 32))),
       r1_(input_buffer_.get()),
       r2_(input_buffer_.get() + kernel_size_ / 2) {
   CHECK(request_frames > kernel_size_ * 3 / 2)
diff --git a/src/third_party/BUILD.gn b/src/third_party/BUILD.gn
index 689664e..4ad2dcf 100644
--- a/src/third_party/BUILD.gn
+++ b/src/third_party/BUILD.gn
@@ -59,7 +59,6 @@ source_set("third_party") {
     "minimp3/minimp3.h",
     "minimp3/minimp3_ex.h",
     "spirv-reflect/spirv_reflect.c",
-    "stb/stb_image.c",
     "stb/stb_image.h",
     "stb/stb_truetype.h",
     "texture_compressor/dxt_encoder.cc",
diff --git a/src/third_party/stb/stb_image.c b/src/third_party/stb/stb_image.c
deleted file mode 100644
index 83f11b2..0000000
--- a/src/third_party/stb/stb_image.c
+++ /dev/null
@@ -1,3 +0,0 @@
-#define STB_IMAGE_IMPLEMENTATION
-#define STBI_NO_STDIO
-#include "stb_image.h"