Motown: Remove LPCM optimizations, fix prepare, add flush, add ActiveMultistreamSink model/stage

services/media/framework/payload_allocator.h

 // 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.
 
-#ifndef SERVICES_MEDIA_FRAMEWORK_ALLOCATOR_H_
-#define SERVICES_MEDIA_FRAMEWORK_ALLOCATOR_H_
+#ifndef SERVICES_MEDIA_FRAMEWORK_PAYLOAD_ALLOCATOR_H_
+#define SERVICES_MEDIA_FRAMEWORK_PAYLOAD_ALLOCATOR_H_
 
-#include <cstdint>
+#include <stddef.h>
 
 namespace mojo {
 namespace media {
 
 // Abstract base class for objects that allocate buffers for packets.
-class Allocator {
+class PayloadAllocator {
  public:
   // Gets the default allocator, which allocates vanilla memory from the heap.
-  static Allocator* GetDefault();
+  static PayloadAllocator* GetDefault();
 
   // Allocates and returns a buffer of the indicated size or returns nullptr
   // if the allocation fails.
-  // TODO(dalesat): Use size_t for sizes in units of bytes framework-wide.
-  virtual void* AllocatePayloadBuffer(uint64_t size) = 0;
+  virtual void* AllocatePayloadBuffer(size_t size) = 0;
 
   // Releases a buffer previously allocated via AllocatePayloadBuffer.
-  virtual void ReleasePayloadBuffer(uint64_t size, void* buffer) = 0;
+  virtual void ReleasePayloadBuffer(size_t size, void* buffer) = 0;
 };
 
 }  // namespace media
 }  // namespace mojo
 
-#endif // SERVICES_MEDIA_FRAMEWORK_ALLOCATOR_H_
+#endif // SERVICES_MEDIA_FRAMEWORK_PAYLOAD_ALLOCATOR_H_