Adding ChunkDemuxer implementation.

media/filters/in_memory_url_protocol.cc

Index: media/filters/in_memory_url_protocol.cc
diff --git a/media/filters/in_memory_url_protocol.cc b/media/filters/in_memory_url_protocol.cc
new file mode 100644
index 0000000000000000000000000000000000000000..dd7d984bac34b259ebdff08edc7d735fb4ec7de5
--- /dev/null
+++ b/media/filters/in_memory_url_protocol.cc
@@ -0,0 +1,59 @@
+// Copyright (c) 2011 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 "media/filters/in_memory_url_protocol.h"
+
+namespace media {
+
+InMemoryUrlProtocol::InMemoryUrlProtocol(const uint8* data, int64 size,
+                                         bool streaming)
+    : data_(data),
+      size_(size),
+      position_(0),
+      streaming_(streaming) {
+}
+
+InMemoryUrlProtocol::~InMemoryUrlProtocol() {}
+
+int InMemoryUrlProtocol::Read(int size, uint8* data) {
+  if (size < 0)
+    return -1;
+
+  int available_bytes = static_cast<int>(size_ - position_);
+  if (size > available_bytes)
+    size = available_bytes;
+
+  memcpy(data, data_ + position_, size);
+  position_ += size;
+  return size;
+}
+
+bool InMemoryUrlProtocol::GetPosition(int64* position_out) {
+  if (!position_out)
+    return false;
+
+  *position_out = position_;
+  return true;
+}
+
+bool InMemoryUrlProtocol::SetPosition(int64 position) {
+  if (position < 0 || position >= size_)
+    return false;
+  position_ = position;
+  return true;
+}
+
+bool InMemoryUrlProtocol::GetSize(int64* size_out) {
+  if (!size_out)
+    return false;
+
+  *size_out = size_;
+  return true;
+}
+
+bool InMemoryUrlProtocol::IsStreaming() {
+  return streaming_;
+}
+
+}  // namespace media