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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains implementation for raw-data which is used
// by the progressive streaming archive system
//
// A RawData object is just a pointer to some memory of a given length.
// This data may represent string data, image data, audio data, etc..
#ifndef O3D_IMPORT_CROSS_RAW_DATA_H_
#define O3D_IMPORT_CROSS_RAW_DATA_H_
#include "base/file_path.h"
#include "base/scoped_ptr.h"
#include "core/cross/error.h"
#include "core/cross/param_object.h"
#include "core/cross/param.h"
#include "core/cross/types.h"
namespace o3d {
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class RawData : public ParamObject {
public:
typedef SmartPointer<RawData> Ref;
static RawData::Ref Create(ServiceLocator* service_locator,
const String &uri,
const void *data,
size_t length);
static RawData::Ref CreateFromFile(ServiceLocator* service_locator,
const String &uri,
const String& filename);
// Creates a RawData object, taking as input a string containing a
// data URL.
static RawData::Ref CreateFromDataURL(ServiceLocator* service_locator,
const String& data_url);
virtual ~RawData();
const uint8 *GetData() const;
template <typename T>
const T* GetDataAs(size_t offset) const {
return reinterpret_cast<const T*>(GetData() + offset);
};
size_t GetLength() const { return length_; }
String StringValue() const;
const String& uri() const { return uri_; }
void set_uri(const String& uri) { uri_ = uri; }
// If the data is still around
// (ie, Discard has not been called), then, if it has not been written
// to a temp file write it to a temp file
void Flush();
// calls Flush() if necessary and returns the path to the temp file
// if Discard() has already been called then returns an "empty" FilePath
const FilePath& GetTempFilePath();
// deletes the data which means IF the data is in memory it is
// freed. If there is a temp file it is deleted.
void Discard();
bool IsOffsetLengthValid(size_t offset, size_t length) const;
private:
String uri_;
mutable scoped_array<uint8> data_;
size_t length_;
FilePath temp_filepath_;
bool allow_string_value_;
// Deletes temp file if it exists
void DeleteTempFile();
RawData(ServiceLocator* service_locator,
const String &uri,
const void *data,
size_t length);
bool SetFromFile(const String& filename);
// Decodes data from a data URL and stores that data in this
// RawData object. Returns false on error, true otherwise
bool SetFromDataURL(const String& data_url);
friend class IClassManager;
friend class Pack;
// Returns |true| on success
bool GetTempFilePathFromURI(const String &uri,
FilePath *temp_fullpath);
O3D_DECL_CLASS(RawData, ParamObject)
DISALLOW_COPY_AND_ASSIGN(RawData);
};
} // namespace o3d
#endif // O3D_IMPORT_CROSS_RAW_DATA_H_
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