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annotate deps/Platinum/ThirdParty/Neptune/Source/Core/NptDataBuffer.cpp @ 9:05c88622db6b default tip

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- Adhoc transcoder now doesn't rely on Platinum - Moved the adhoc transcoder to the main source tree; it can be moved back into test once it's more stable
author fraserofthenight
date Tue, 14 Jul 2009 22:04:05 -0700
parents 3425707ddbf6
children
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1 /*****************************************************************
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2 |
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3 | Neptune - Data Buffer
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4 |
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5 | Copyright (c) 2002-2008, Axiomatic Systems, LLC.
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6 | All rights reserved.
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7 |
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8 | Redistribution and use in source and binary forms, with or without
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9 | modification, are permitted provided that the following conditions are met:
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10 | * Redistributions of source code must retain the above copyright
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11 | notice, this list of conditions and the following disclaimer.
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12 | * Redistributions in binary form must reproduce the above copyright
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13 | notice, this list of conditions and the following disclaimer in the
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14 | documentation and/or other materials provided with the distribution.
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15 | * Neither the name of Axiomatic Systems nor the
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16 | names of its contributors may be used to endorse or promote products
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17 | derived from this software without specific prior written permission.
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18 |
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19 | THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
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20 | EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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21 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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22 | DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
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23 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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24 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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25 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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26 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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27 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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28 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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29 |
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30 ****************************************************************/
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31
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32 /*----------------------------------------------------------------------
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33 | includes
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34 +---------------------------------------------------------------------*/
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35 #include "NptDataBuffer.h"
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36 #include "NptUtils.h"
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37 #include "NptResults.h"
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38
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39 /*----------------------------------------------------------------------
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40 | NPT_DataBuffer::NPT_DataBuffer
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41 +---------------------------------------------------------------------*/
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42 NPT_DataBuffer::NPT_DataBuffer() :
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43 m_BufferIsLocal(true),
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44 m_Buffer(NULL),
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45 m_BufferSize(0),
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46 m_DataSize(0)
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47 {
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48 }
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49
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50 /*----------------------------------------------------------------------
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51 | NPT_DataBuffer::NPT_DataBuffer
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52 +---------------------------------------------------------------------*/
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53 NPT_DataBuffer::NPT_DataBuffer(NPT_Size bufferSize) :
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54 m_BufferIsLocal(true),
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55 m_Buffer(bufferSize?new NPT_Byte[bufferSize]:NULL),
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56 m_BufferSize(bufferSize),
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57 m_DataSize(0)
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58 {
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59 }
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60
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61 /*----------------------------------------------------------------------
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62 | NPT_DataBuffer::NPT_DataBuffer
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63 +---------------------------------------------------------------------*/
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64 NPT_DataBuffer::NPT_DataBuffer(const void* data, NPT_Size data_size, bool copy) :
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65 m_BufferIsLocal(copy),
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66 m_Buffer(copy?(data_size?new NPT_Byte[data_size]:NULL):reinterpret_cast<NPT_Byte*>(const_cast<void*>(data))),
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67 m_BufferSize(data_size),
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68 m_DataSize(data_size)
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69 {
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70 if (copy && data_size) NPT_CopyMemory(m_Buffer, data, data_size);
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71 }
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72
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73 /*----------------------------------------------------------------------
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74 | NPT_DataBuffer::NPT_DataBuffer
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75 +---------------------------------------------------------------------*/
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76 NPT_DataBuffer::NPT_DataBuffer(const NPT_DataBuffer& other) :
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77 m_BufferIsLocal(true),
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78 m_Buffer(NULL),
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79 m_BufferSize(other.m_DataSize),
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80 m_DataSize(other.m_DataSize)
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81 {
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82 if (m_BufferSize) {
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83 m_Buffer = new NPT_Byte[m_BufferSize];
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84 NPT_CopyMemory(m_Buffer, other.m_Buffer, m_BufferSize);
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85 }
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86 }
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87
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88 /*----------------------------------------------------------------------
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89 | NPT_DataBuffer::~NPT_DataBuffer
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90 +---------------------------------------------------------------------*/
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91 NPT_DataBuffer::~NPT_DataBuffer()
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92 {
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93 Clear();
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94 }
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95
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96 /*----------------------------------------------------------------------
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97 | NPT_DataBuffer::Clear
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98 +---------------------------------------------------------------------*/
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99 NPT_Result
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100 NPT_DataBuffer::Clear()
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101 {
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102 if (m_BufferIsLocal) {
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103 delete[] m_Buffer;
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104 }
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105 m_Buffer = NULL;
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106 m_DataSize = 0;
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107 m_BufferSize = 0;
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108
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109 return NPT_SUCCESS;
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110 }
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111
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112 /*----------------------------------------------------------------------
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113 | NPT_DataBuffer::operator=
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114 +---------------------------------------------------------------------*/
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115 NPT_DataBuffer&
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116 NPT_DataBuffer::operator=(const NPT_DataBuffer& copy)
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117 {
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118 // do nothing if we're assigning to ourselves
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119 if (this != &copy) {
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120 Clear();
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121
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122 m_BufferIsLocal = true;
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123 m_BufferSize = copy.m_BufferSize;
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124 m_DataSize = copy.m_DataSize;
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125
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126 if (m_BufferSize) {
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127 m_Buffer = new NPT_Byte[m_BufferSize];
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128 NPT_CopyMemory(m_Buffer, copy.m_Buffer, m_BufferSize);
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129 }
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130 }
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131 return *this;
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132 }
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133
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134 /*----------------------------------------------------------------------
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135 | NPT_DataBuffer::operator==
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136 +---------------------------------------------------------------------*/
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137 bool
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138 NPT_DataBuffer::operator==(const NPT_DataBuffer& other) const
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139 {
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140 // check that the sizes match
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141 if (m_DataSize != other.m_DataSize) return false;
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142
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143 return NPT_MemoryEqual(m_Buffer,
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144 other.m_Buffer,
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145 m_DataSize);
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146 }
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147
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148 /*----------------------------------------------------------------------
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149 | NPT_DataBuffer::SetBuffer
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150 +---------------------------------------------------------------------*/
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151 NPT_Result
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152 NPT_DataBuffer::SetBuffer(NPT_Byte* buffer, NPT_Size buffer_size)
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153 {
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154 Clear();
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155
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156 // we're now using an external buffer
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157 m_BufferIsLocal = false;
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158 m_Buffer = buffer;
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159 m_BufferSize = buffer_size;
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160 m_DataSize = 0;
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161
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162 return NPT_SUCCESS;
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163 }
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164
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165 /*----------------------------------------------------------------------
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166 | NPT_DataBuffer::SetBufferSize
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167 +---------------------------------------------------------------------*/
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168 NPT_Result
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169 NPT_DataBuffer::SetBufferSize(NPT_Size buffer_size)
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170 {
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171 if (m_BufferIsLocal) {
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172 return ReallocateBuffer(buffer_size);
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173 } else {
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174 return NPT_ERROR_NOT_SUPPORTED; // you cannot change the
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175 // buffer management mode
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176 }
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177 }
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178
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179 /*----------------------------------------------------------------------
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180 | NPT_DataBuffer::Reserve
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181 +---------------------------------------------------------------------*/
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182 NPT_Result
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183 NPT_DataBuffer::Reserve(NPT_Size size)
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184 {
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185 if (size <= m_BufferSize) return NPT_SUCCESS;
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186
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187 // try doubling the buffer to accomodate for the new size
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188 NPT_Size new_size = m_BufferSize*2;
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189 if (new_size < size) new_size = size;
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190 return SetBufferSize(new_size);
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191 }
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192
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193 /*----------------------------------------------------------------------
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194 | NPT_DataBuffer::SetDataSize
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195 +---------------------------------------------------------------------*/
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196 NPT_Result
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197 NPT_DataBuffer::SetDataSize(NPT_Size size)
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198 {
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199 if (size > m_BufferSize) {
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200 // the buffer is too small, we need to reallocate it
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201 if (m_BufferIsLocal) {
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202 NPT_CHECK(ReallocateBuffer(size));
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203 } else {
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204 // we cannot reallocate an external buffer
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205 return NPT_ERROR_NOT_SUPPORTED;
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206 }
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207 }
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208 m_DataSize = size;
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209 return NPT_SUCCESS;
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210 }
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211
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212 /*----------------------------------------------------------------------
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213 | NPT_DataBuffer::SetData
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214 +---------------------------------------------------------------------*/
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215 NPT_Result
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216 NPT_DataBuffer::SetData(const NPT_Byte* data, NPT_Size size)
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217 {
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218 if (size > m_BufferSize) {
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219 if (m_BufferIsLocal) {
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220 NPT_CHECK(ReallocateBuffer(size));
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221 } else {
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222 return NPT_ERROR_INVALID_STATE;
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223 }
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224 }
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225 if (data) NPT_CopyMemory(m_Buffer, data, size);
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226 m_DataSize = size;
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227
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228 return NPT_SUCCESS;
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229 }
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230
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231 /*----------------------------------------------------------------------
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232 | NPT_DataBuffer::ReallocateBuffer
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233 +---------------------------------------------------------------------*/
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234 NPT_Result
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235 NPT_DataBuffer::ReallocateBuffer(NPT_Size size)
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236 {
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237 // check that the existing data fits
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238 if (m_DataSize > size) return NPT_ERROR_INVALID_PARAMETERS;
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239
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240 // allocate a new buffer
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241 NPT_Byte* newBuffer = new NPT_Byte[size];
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242
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243 // copy the contents of the previous buffer, if any
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244 if (m_Buffer && m_DataSize) {
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245 NPT_CopyMemory(newBuffer, m_Buffer, m_DataSize);
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246 }
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247
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248 // destroy the previous buffer
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249 delete[] m_Buffer;
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250
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251 // use the new buffer
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252 m_Buffer = newBuffer;
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253 m_BufferSize = size;
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254
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255 return NPT_SUCCESS;
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256 }