Motown in-proc streaming framework used to implement media services.

services/media/framework/allocator.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <cstdlib>
+
+#include "base/logging.h"
+#include "services/media/framework/allocator.h"
+
+namespace mojo {
+namespace media {
+
+namespace {
+
+class DefaultAllocator : public Allocator {
+ public:
+  // Allocator implementation.
+  void* AllocatePayloadBuffer(uint64_t size) override;
+
+  void ReleasePayloadBuffer(uint64_t size, void* buffer) override;
+};
+
+void* DefaultAllocator::AllocatePayloadBuffer(uint64_t size) {
+  DCHECK(size > 0);
+  return std::malloc(static_cast<size_t>(size));
+}
+
+void DefaultAllocator::ReleasePayloadBuffer(uint64_t size, void* buffer) {
+  DCHECK(size > 0);
+  DCHECK(buffer);
+  std::free(buffer);
+}
+
+class NullAllocator : public Allocator {
+ public:
+  // Allocator implementation.
+  void* AllocatePayloadBuffer(uint64_t size) override;
+
+  void ReleasePayloadBuffer(uint64_t size, void* buffer) override;
+};
+
+void* NullAllocator::AllocatePayloadBuffer(uint64_t size) {
+  NOTREACHED();
+  return nullptr;
+}
+
+void NullAllocator::ReleasePayloadBuffer(uint64_t size, void* buffer) {
+  DCHECK(size > 0);
+  DCHECK(buffer);
+}
+
+static DefaultAllocator default_allocator;
+static NullAllocator null_allocator;
+
+} // namespace
+
+// static
+Allocator* Allocator::GetDefault() {
+  return &default_allocator;
+}
+
+// static
+Allocator* Allocator::GetNull() {
+  return &null_allocator;
+}
+
+} // namespace media
+} // namespace mojo