本文整理汇总了C++中FileReader::ReadChunk方法的典型用法代码示例。如果您正苦于以下问题：C++ FileReader::ReadChunk方法的具体用法？C++ FileReader::ReadChunk怎么用？C++ FileReader::ReadChunk使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类FileReader的用法示例。
在下文中一共展示了FileReader::ReadChunk方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ReadDIGI
bool CSoundFile::ReadDIGI(FileReader &file, ModLoadingFlags loadFlags)
//--------------------------------------------------------------------
{
file.Rewind();
DIGIFileHeader fileHeader;
if(!file.ReadConvertEndianness(fileHeader)
|| memcmp(fileHeader.signature, "DIGI Booster module\0", 20)
|| !fileHeader.numChannels
|| fileHeader.numChannels > 8
|| fileHeader.lastOrdIndex > 127)
{
return false;
} else if(loadFlags == onlyVerifyHeader)
{
return true;
}
// Globals
InitializeGlobals();
InitializeChannels();
m_nType = MOD_TYPE_DIGI;
m_nChannels = fileHeader.numChannels;
m_nSamples = 31;
m_nSamplePreAmp = 256 / m_nChannels;
madeWithTracker = mpt::String::Print("Digi Booster %1.%2", fileHeader.versionInt >> 4, fileHeader.versionInt & 0x0F);
Order.ReadFromArray(fileHeader.orders, fileHeader.lastOrdIndex + 1);
// Read sample headers
for(SAMPLEINDEX smp = 0; smp < 31; smp++)
{
ModSample &sample = Samples[smp + 1];
sample.Initialize(MOD_TYPE_MOD);
sample.nLength = fileHeader.smpLength[smp];
sample.nLoopStart = fileHeader.smpLoopStart[smp];
sample.nLoopEnd = sample.nLoopStart + fileHeader.smpLoopLength[smp];
if(fileHeader.smpLoopLength[smp])
{
sample.uFlags.set(CHN_LOOP);
}
sample.SanitizeLoops();
sample.nVolume = std::min(fileHeader.smpVolume[smp], uint8(64)) * 4;
sample.nFineTune = MOD2XMFineTune(fileHeader.smpFinetune[smp]);
}
// Read song + sample names
file.ReadString<mpt::String::maybeNullTerminated>(songName, 32);
for(SAMPLEINDEX smp = 1; smp <= 31; smp++)
{
file.ReadString<mpt::String::maybeNullTerminated>(m_szNames[smp], 30);
}
for(PATTERNINDEX pat = 0; pat <= fileHeader.lastPatIndex; pat++)
{
FileReader patternChunk;
if(fileHeader.packEnable)
{
patternChunk = file.ReadChunk(file.ReadUint16BE());
} else
{
patternChunk = file.ReadChunk(4 * 64 * GetNumChannels());
}
if(!(loadFlags & loadPatternData) || Patterns.Insert(pat, 64))
{
continue;
}
if(fileHeader.packEnable)
{
std::vector<uint8> eventMask;
patternChunk.ReadVector(eventMask, 64);
// Compressed patterns are stored in row-major order...
for(ROWINDEX row = 0; row < 64; row++)
{
PatternRow patRow = Patterns[pat].GetRow(row);
uint8 bit = 0x80;
for(CHANNELINDEX chn = 0; chn < GetNumChannels(); chn++, bit >>= 1)
{
if(eventMask[row] & bit)
{
ModCommand &m = patRow[chn];
ReadDIGIPatternEntry(patternChunk, m, *this);
}
}
}
} else
{
// ...but uncompressed patterns are stored in column-major order. WTF!
for(CHANNELINDEX chn = 0; chn < GetNumChannels(); chn++)示例2: LoadFile
VSTPresets::ErrorCode VSTPresets::LoadFile(FileReader &file, CVstPlugin &plugin)
//------------------------------------------------------------------------------
{
const bool firstChunk = file.GetPosition() == 0;
ChunkHeader header;
if(!file.ReadConvertEndianness(header) || header.chunkMagic != cMagic)
{
return invalidFile;
}
if(header.fxID != plugin.GetUID())
{
return wrongPlugin;
}
if(header.fxMagic == fMagic || header.fxMagic == chunkPresetMagic)
{
// Program
PlugParamIndex numParams = file.ReadUint32BE();
VstPatchChunkInfo info;
info.version = 1;
info.pluginUniqueID = header.fxID;
info.pluginVersion = header.fxVersion;
info.numElements = numParams;
MemsetZero(info.future);
plugin.Dispatch(effBeginLoadProgram, 0, 0, &info, 0.0f);
plugin.Dispatch(effBeginSetProgram, 0, 0, nullptr, 0.0f);
char prgName[28];
file.ReadString<mpt::String::maybeNullTerminated>(prgName, 28);
plugin.Dispatch(effSetProgramName, 0, 0, prgName, 0.0f);
if(header.fxMagic == fMagic)
{
if(plugin.GetNumParameters() != numParams)
{
return wrongParameters;
}
for(PlugParamIndex p = 0; p < numParams; p++)
{
plugin.SetParameter(p, file.ReadFloatBE());
}
} else
{
FileReader chunk = file.ReadChunk(file.ReadUint32BE());
plugin.Dispatch(effSetChunk, 1, chunk.GetLength(), const_cast<char *>(chunk.GetRawData()), 0);
}
plugin.Dispatch(effEndSetProgram, 0, 0, nullptr, 0.0f);
} else if((header.fxMagic == bankMagic || header.fxMagic == chunkBankMagic) && firstChunk)
{
// Bank - only read if it's the first chunk in the file, not if it's a sub chunk.
uint32 numProgs = file.ReadUint32BE();
uint32 currentProgram = file.ReadUint32BE();
file.Skip(124);
VstPatchChunkInfo info;
info.version = 1;
info.pluginUniqueID = header.fxID;
info.pluginVersion = header.fxVersion;
info.numElements = numProgs;
MemsetZero(info.future);
plugin.Dispatch(effBeginLoadBank, 0, 0, &info, 0.0f);
if(header.fxMagic == bankMagic)
{
VstInt32 oldCurrentProgram = plugin.GetCurrentProgram();
for(uint32 p = 0; p < numProgs; p++)
{
plugin.Dispatch(effBeginSetProgram, 0, 0, nullptr, 0.0f);
plugin.Dispatch(effSetProgram, 0, 0, nullptr, 0.0f);
ErrorCode retVal = LoadFile(file, plugin);
if(retVal != noError)
{
return retVal;
}
plugin.Dispatch(effEndSetProgram, 0, 0, nullptr, 0.0f);
}
plugin.SetCurrentProgram(oldCurrentProgram);
} else
{
FileReader chunk = file.ReadChunk(file.ReadUint32BE());
plugin.Dispatch(effSetChunk, 0, chunk.GetLength(), const_cast<char *>(chunk.GetRawData()), 0);
}
if(header.version >= 2)
{
plugin.SetCurrentProgram(currentProgram);
}
}
return noError;
}