Introducing DecoderBuffer and general Buffer cleanup.

media/base/data_buffer.cc

 // Copyright (c) 2012 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 "base/logging.h"
 #include "media/base/data_buffer.h"
-#include "media/base/decrypt_config.h"
-#if !defined(OS_ANDROID)
-#include "media/ffmpeg/ffmpeg_common.h"
-#endif
 
 namespace media {
 
 DataBuffer::DataBuffer(scoped_array<uint8> buffer, int buffer_size)
     : Buffer(base::TimeDelta(), base::TimeDelta()),
       data_(buffer.Pass()),
       buffer_size_(buffer_size),
       data_size_(buffer_size) {
 }
 
 DataBuffer::DataBuffer(int buffer_size)
     : Buffer(base::TimeDelta(), base::TimeDelta()),
-      data_(new uint8[buffer_size]),
       buffer_size_(buffer_size),
       data_size_(0) {
-  CHECK(data_.get()) << "DataBuffer ctor failed to allocate memory";
-
-  // Prevent arbitrary pointers.
-  if (buffer_size == 0)
-    data_.reset(NULL);
+  Initialize();
 }
 
 DataBuffer::DataBuffer(const uint8* data, int data_size)
     : Buffer(base::TimeDelta(), base::TimeDelta()),
-      buffer_size_(0),
-      data_size_(0) {
-  if (data_size == 0)
-    return;
-
-  int padding_size = 0;
-#if !defined(OS_ANDROID)
-  // FFmpeg assumes all input buffers are padded with this value.
-  padding_size = FF_INPUT_BUFFER_PADDING_SIZE;
-#endif
-
-  buffer_size_ = data_size + padding_size;
-  data_.reset(new uint8[buffer_size_]);
-  memcpy(data_.get(), data, data_size);
-  memset(data_.get() + data_size, 0, padding_size);
-  SetDataSize(data_size);
+      buffer_size_(data_size),
+      data_size_(data_size) {
+  Initialize();
+  memcpy(data_.get(), data, data_size_);
 }
 
 DataBuffer::~DataBuffer() {}
 
+void DataBuffer::Initialize() {
+  // Prevent arbitrary pointers.
+  if (buffer_size_ <= 0) {
+    buffer_size_ = data_size_ = 0;
+    data_.reset();
+    return;
+  }
+
+  data_.reset(new uint8[buffer_size_]);
+}
+
 scoped_refptr<DataBuffer> DataBuffer::CopyFrom(const uint8* data,
                                                int data_size) {
   return make_scoped_refptr(new DataBuffer(data, data_size));
 }
 
 const uint8* DataBuffer::GetData() const {
   return data_.get();
 }
 
 int DataBuffer::GetDataSize() const {
   return data_size_;
 }
 
-const DecryptConfig* DataBuffer::GetDecryptConfig() const {
-  return decrypt_config_.get();
-}
-
 uint8* DataBuffer::GetWritableData() {
   return data_.get();
 }
 
 void DataBuffer::SetDataSize(int data_size) {
   DCHECK_LE(data_size, buffer_size_);
   data_size_ = data_size;
 }
 
 int DataBuffer::GetBufferSize() const {
   return buffer_size_;
 }
 
-void DataBuffer::SetDecryptConfig(scoped_ptr<DecryptConfig> decrypt_config) {
-  decrypt_config_ = decrypt_config.Pass();
-}
-
 }  // namespace media