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include/AK/Tools/Common/AkBankReadHelpers.h

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00001 /*******************************************************************************
00002 The content of this file includes portions of the AUDIOKINETIC Wwise Technology
00003 released in source code form as part of the SDK installer package.
00004 
00005 Commercial License Usage
00006 
00007 Licensees holding valid commercial licenses to the AUDIOKINETIC Wwise Technology
00008 may use this file in accordance with the end user license agreement provided 
00009 with the software or, alternatively, in accordance with the terms contained in a
00010 written agreement between you and Audiokinetic Inc.
00011 
00012 Apache License Usage
00013 
00014 Alternatively, this file may be used under the Apache License, Version 2.0 (the 
00015 "Apache License"); you may not use this file except in compliance with the 
00016 Apache License. You may obtain a copy of the Apache License at 
00017 http://www.apache.org/licenses/LICENSE-2.0.
00018 
00019 Unless required by applicable law or agreed to in writing, software distributed
00020 under the Apache License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
00021 OR CONDITIONS OF ANY KIND, either express or implied. See the Apache License for
00022 the specific language governing permissions and limitations under the License.
00023 
00024   Version: <VERSION>  Build: <BUILDNUMBER>
00025   Copyright (c) <COPYRIGHTYEAR> Audiokinetic Inc.
00026 *******************************************************************************/
00027 
00028 #ifndef _AK_BANKREADHELPERS_H_
00029 #define _AK_BANKREADHELPERS_H_
00030 
00031 /// Read data from bank and advance pointer.
00032 template< typename T > 
00033 inline T ReadBankData( 
00034                         AkUInt8*& in_rptr 
00035 #ifdef _DEBUG
00036                         ,AkUInt32& in_rSize
00037 #endif
00038                         )
00039 {
00040     T l_Value;
00041 #if defined(AK_IOS) || defined(AK_ANDROID) || defined(AK_VITA) || defined(AK_LINUX) || defined(__EMSCRIPTEN__) || defined (AK_NX)
00042     typedef struct {T t;} __attribute__((__packed__)) packedStruct;
00043     l_Value = ((packedStruct *)in_rptr)->t;
00044 #else
00045     l_Value = *( ( T* )in_rptr );
00046 #endif
00047 
00048     in_rptr += sizeof( T );
00049 #ifdef _DEBUG
00050     in_rSize -= sizeof( T );
00051 #endif
00052     return l_Value;
00053 }
00054 
00055 template< typename T >
00056 inline T ReadVariableSizeBankData(
00057     AkUInt8*& in_rptr
00058 #ifdef _DEBUG
00059     , AkUInt32& in_rSize
00060 #endif
00061     )
00062 {
00063     AkUInt32 l_Value = 0;
00064 
00065     AkUInt8 currentByte = *in_rptr;
00066     ++in_rptr;
00067 #ifdef _DEBUG
00068     --in_rSize;
00069 #endif
00070     l_Value = (currentByte & 0x7F);
00071     while (0x80 & currentByte)
00072     {
00073         currentByte = *in_rptr;
00074         ++in_rptr;
00075 #ifdef _DEBUG
00076         --in_rSize;
00077 #endif
00078         l_Value = l_Value << 7;
00079         l_Value |= (currentByte & 0x7F);
00080     }
00081 
00082     return (T)l_Value;
00083 }
00084 
00085 inline char * ReadBankStringUtf8( 
00086                         AkUInt8*& in_rptr 
00087 #ifdef _DEBUG
00088                         ,AkUInt32& in_rSize
00089 #endif
00090                         ,AkUInt32& out_uStringSize )
00091 {
00092     out_uStringSize = ReadBankData<AkUInt32>( in_rptr 
00093 #ifdef _DEBUG
00094                         ,in_rSize
00095 #endif
00096                         );
00097 
00098     char * pString = 0;
00099     if ( out_uStringSize > 0 )
00100     {
00101         pString = reinterpret_cast<char*>( in_rptr );
00102         in_rptr += out_uStringSize;
00103 #ifdef _DEBUG
00104         in_rSize -= out_uStringSize;
00105 #endif
00106     }
00107     return pString;
00108 }
00109 
00110 /// Read unaligned memory, const version
00111 template< typename T >
00112 inline T ReadUnaligned( const AkUInt8* in_rptr, AkUInt32 in_bytesToSkip = 0 )
00113 {
00114 #ifdef _DEBUG
00115     AkUInt32 size = sizeof(T);
00116 #endif
00117     AkUInt8* ptr = const_cast<AkUInt8*>(in_rptr) + in_bytesToSkip;
00118     return ReadBankData<T>(ptr
00119 #ifdef _DEBUG
00120     , size
00121 #endif
00122     );
00123 }
00124 
00125 #ifdef __EMSCRIPTEN__
00126 
00127 /// Handle reading float not aligned on proper memory boundaries (banks are byte packed).
00128 inline AkReal64 AlignFloat(AkReal64* ptr)
00129 {
00130     AkReal64 LocalValue;
00131 
00132     // Forcing the char copy instead of the memcpy, as memcpy was optimized....
00133     char* pSource = (char*)ptr;
00134     char* pDest = (char*)&LocalValue;
00135     for( int i = 0; i < 8; ++i)
00136     {
00137         pDest[i] = pSource[i];
00138     }
00139 
00140     //memcpy( &LocalValue, ptr, sizeof( AkReal64 ) );
00141     return LocalValue;
00142 }
00143 
00144 /// Read data from bank and advance pointer.
00145 template<> 
00146 inline AkReal64 ReadBankData<AkReal64>( 
00147     AkUInt8*& in_rptr
00148 #ifdef _DEBUG
00149     ,AkUInt32& in_rSize
00150 #endif
00151     )
00152 {
00153     AkReal64 l_Value = AlignFloat( (AkReal64*)in_rptr );
00154     in_rptr += sizeof( AkReal64 );
00155 #ifdef _DEBUG
00156     in_rSize -= sizeof( AkReal64 );
00157 #endif
00158     return l_Value;
00159 }
00160 #endif
00161 
00162 #if defined( __SNC__ ) // Valid for Vita (w/SN Compiler)
00163     /// Handle reading float not aligned on proper memory boundaries (banks are byte packed).
00164     inline AkReal32 AlignFloat( AkReal32 __unaligned * ptr )
00165     {
00166         return *ptr;
00167     }
00168     
00169     /// Read data from bank and advance pointer.
00170     template<> 
00171     inline AkReal32 ReadBankData<AkReal32>( 
00172                                            AkUInt8*& in_rptr
00173     #ifdef _DEBUG
00174                                            ,AkUInt32& in_rSize
00175     #endif
00176                                            )
00177     {
00178         AkReal32 l_Value = AlignFloat( ( AkReal32* )in_rptr );
00179         in_rptr += sizeof( AkReal32 );
00180     #ifdef _DEBUG
00181         in_rSize -= sizeof( AkReal32 );
00182     #endif
00183         return l_Value;
00184     }
00185     
00186     /// Handle reading float not aligned on proper memory boundaries (banks are byte packed).
00187     inline AkReal64 AlignFloat( AkReal64 __unaligned * ptr )
00188     {
00189         return *ptr;
00190     }
00191     
00192     /// Read data from bank and advance pointer.
00193     template<> 
00194     inline AkReal64 ReadBankData<AkReal64>( 
00195                                            AkUInt8*& in_rptr
00196     #ifdef _DEBUG
00197                                            ,AkUInt32& in_rSize
00198     #endif
00199                                            )
00200     {
00201         AkReal64 l_Value = AlignFloat( ( AkReal64* )in_rptr );
00202         in_rptr += sizeof( AkReal64 );
00203     #ifdef _DEBUG
00204         in_rSize -= sizeof( AkReal64 );
00205     #endif
00206         return l_Value;
00207     }
00208 
00209 #elif (defined(AK_IOS) && defined(_DEBUG)) // bug with iOS SDK 4.3 in Debug only
00210 
00211 /// Type conversion helper on some platforms.
00212 template < typename TO, typename FROM >
00213 inline TO union_cast( FROM value )
00214 {
00215     union { FROM from; TO to; } convert;
00216     convert.from = value;
00217     return convert.to;
00218 }
00219 
00220 /// Handle reading float not aligned on proper memory boundaries (banks are byte packed).
00221 inline AkReal32 AlignFloat( AkReal32* ptr )
00222 {
00223     AkUInt32 *puint = reinterpret_cast<AkUInt32 *>( ptr );
00224     volatile AkUInt32 uint = *puint;
00225     return union_cast<AkReal32>( uint );
00226 }
00227 
00228 /// Read data from bank and advance pointer.
00229 template<> 
00230 inline AkReal32 ReadBankData<AkReal32>( 
00231                                        AkUInt8*& in_rptr
00232 #ifdef _DEBUG
00233                                        ,AkUInt32& in_rSize
00234 #endif
00235                                        )
00236 {
00237     AkReal32 l_Value = AlignFloat( ( AkReal32* )in_rptr );
00238     in_rptr += sizeof( AkReal32 );
00239 #ifdef _DEBUG
00240     in_rSize -= sizeof( AkReal32 );
00241 #endif
00242     return l_Value;
00243 }
00244 
00245 /// Handle reading float not aligned on proper memory boundaries (banks are byte packed).
00246 inline AkReal64 AlignFloat( AkReal64* ptr )
00247 {
00248     AkUInt64 *puint = reinterpret_cast<AkUInt64 *>( ptr );
00249     volatile AkUInt64 uint = *puint;
00250     return union_cast<AkReal64>( uint );
00251 }
00252 
00253 /// Read data from bank and advance pointer.
00254 template<> 
00255 inline AkReal64 ReadBankData<AkReal64>( 
00256                                        AkUInt8*& in_rptr
00257 #ifdef _DEBUG
00258                                        ,AkUInt32& in_rSize
00259 #endif
00260                                        )
00261 {
00262     AkReal64 l_Value = AlignFloat( ( AkReal64* )in_rptr );
00263     in_rptr += sizeof( AkReal64 );
00264 #ifdef _DEBUG
00265     in_rSize -= sizeof( AkReal64 );
00266 #endif
00267     return l_Value;
00268 }
00269 #endif
00270 
00271 #ifdef _DEBUG
00272 
00273 /// Read and return bank data of a given type, incrementing running pointer and decrementing block size for debug tracking purposes
00274 #define READBANKDATA( _Type, _Ptr, _Size )      \
00275         ReadBankData<_Type>( _Ptr, _Size )
00276 
00277 #define READVARIABLESIZEBANKDATA( _Type, _Ptr, _Size )      \
00278         ReadVariableSizeBankData<_Type>( _Ptr, _Size )
00279 
00280 /// Read and return non-null-terminatd UTF-8 string stored in bank, and its size.
00281 #define READBANKSTRING_UTF8( _Ptr, _Size, _out_StringSize )     \
00282         ReadBankStringUtf8( _Ptr, _Size, _out_StringSize )
00283 
00284 /// Read and return non-null-terminatd string stored in bank, and its size.
00285 #define READBANKSTRING( _Ptr, _Size, _out_StringSize )      \
00286         ReadBankStringUtf8( _Ptr, _Size, _out_StringSize ) //same as UTF-8 for now.
00287 
00288 /// Skip over some bank data  of a given type, incrementing running pointer and decrementing block size for debug tracking purposes
00289 #define SKIPBANKDATA( _Type, _Ptr, _Size )      \
00290         ( _Ptr ) += sizeof( _Type );    \
00291         ( _Size ) -= sizeof( _Type )
00292 
00293 /// Skip over some bank data by a given size in bytes, incrementing running pointer and decrementing block size for debug tracking purposes
00294 #define SKIPBANKBYTES( _NumBytes, _Ptr, _Size ) \
00295         ( _Ptr ) += _NumBytes;      \
00296         ( _Size ) -= _NumBytes
00297 
00298 #else
00299 
00300 /// Read and return bank data of a given type, incrementing running pointer and decrementing block size for debug tracking purposes
00301 #define READBANKDATA( _Type, _Ptr, _Size )      \
00302         ReadBankData<_Type>( _Ptr )
00303 
00304 #define READVARIABLESIZEBANKDATA( _Type, _Ptr, _Size )      \
00305         ReadVariableSizeBankData<_Type>( _Ptr )
00306 
00307 #define READBANKSTRING_UTF8( _Ptr, _Size, _out_StringSize )     \
00308         ReadBankStringUtf8( _Ptr, _out_StringSize )
00309 
00310 #define READBANKSTRING( _Ptr, _Size, _out_StringSize )      \
00311         ReadBankStringUtf8( _Ptr, _out_StringSize )
00312 
00313 /// Skip over some bank data  of a given type, incrementing running pointer and decrementing block size for debug tracking purposes
00314 #define SKIPBANKDATA( _Type, _Ptr, _Size )      \
00315         ( _Ptr ) += sizeof( _Type )
00316 
00317 /// Skip over some bank data by a given size in bytes, incrementing running pointer and decrementing block size for debug tracking purposes
00318 #define SKIPBANKBYTES( _NumBytes, _Ptr, _Size ) \
00319         ( _Ptr ) += _NumBytes;
00320 
00321 #endif
00322 
00323 #define GETBANKDATABIT( _Data, _Shift ) \
00324     (((_Data) >> (_Shift)) & 0x1)
00325 
00326 /// Helper macro to determine whether the full content of a block of memory was properly parsed
00327 #ifdef _DEBUG
00328     #define CHECKBANKDATASIZE( _DATASIZE_, _ERESULT_ ) AKASSERT( _DATASIZE_ == 0 || _ERESULT_ != AK_Success );
00329 #else
00330     #define CHECKBANKDATASIZE(_DATASIZE_, _ERESULT_ )
00331 #endif
00332 
00333 #endif //_AK_BANKREADHELPERS_H_

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