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/*
* Load_cba.cpp
* ------------
* Purpose: Chuck Biscuits / Black Artist (CBA) module loader
* Notes : This format appears to have been used only for the Expoze musicdisk by Heretics.
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#include "stdafx.h"
#include "Loaders.h"
OPENMPT_NAMESPACE_BEGIN
struct CBAFileHeader
{
char magic[4]; // 'CBA\xF9'
char title[32];
uint8 eof;
uint16le messageLength;
uint8 numChannels;
uint8 lastPattern;
uint8 numOrders;
uint8 numSamples;
uint8 speed;
uint8 tempo;
uint8 panPos[32];
uint8 orders[255];
bool IsValid() const
{
return !memcmp(magic, "CBA\xF9", 4)
&& eof == 0x1A
&& numChannels > 0 && numChannels <= 32
&& speed > 0
&& tempo >= 32;
}
uint32 GetHeaderMinimumAdditionalSize() const
{
return numSamples * 48 + messageLength;
}
};
MPT_BINARY_STRUCT(CBAFileHeader, 332)
struct CBASampleHeader
{
char name[32];
uint8 flags;
uint8 volume;
uint16le sampleRate;
uint32le length;
uint32le loopStart;
uint32le loopEnd;
void ConvertToMPT(ModSample &mptSmp) const
{
mptSmp.Initialize();
mptSmp.nVolume = volume * 4;
mptSmp.nC5Speed = sampleRate;
mptSmp.nLength = length;
mptSmp.nLoopStart = loopStart;
mptSmp.nLoopEnd = loopEnd;
mptSmp.uFlags.set(CHN_LOOP, flags & 0x08);
}
};
MPT_BINARY_STRUCT(CBASampleHeader, 48)
CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderCBA(MemoryFileReader file, const uint64 *pfilesize)
{
CBAFileHeader fileHeader;
if(!file.ReadStruct(fileHeader))
return ProbeWantMoreData;
if(!fileHeader.IsValid())
return ProbeFailure;
return ProbeAdditionalSize(file, pfilesize, fileHeader.GetHeaderMinimumAdditionalSize());
}
bool CSoundFile::ReadCBA(FileReader &file, ModLoadingFlags loadFlags)
{
CBAFileHeader fileHeader;
file.Rewind();
if(!file.ReadStruct(fileHeader) || !fileHeader.IsValid())
return false;
if(!file.CanRead(fileHeader.GetHeaderMinimumAdditionalSize()))
return false;
if(loadFlags == onlyVerifyHeader)
return true;
InitializeGlobals(MOD_TYPE_S3M, fileHeader.numChannels);
m_SongFlags.set(SONG_IMPORTED);
m_playBehaviour.set(kST3SampleSwap); // AFTERMIX.CBA, pattern 53
m_nMixLevels = MixLevels::CompatibleFT2;
m_nSamples = fileHeader.numSamples;
m_songName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, fileHeader.title);
Order().SetDefaultTempoInt(fileHeader.tempo);
Order().SetDefaultSpeed(fileHeader.speed);
ReadOrderFromArray(Order(), fileHeader.orders, fileHeader.numOrders, 0xFF, 0xFE);
for(CHANNELINDEX chn = 0; chn < GetNumChannels(); chn++)
{
ChnSettings[chn].nPan = fileHeader.panPos[chn] * 2;
}
for(SAMPLEINDEX smp = 1; smp <= m_nSamples; smp++)
{
CBASampleHeader sampleHeader;
file.ReadStruct(sampleHeader);
sampleHeader.ConvertToMPT(Samples[smp]);
m_szNames[smp] = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, sampleHeader.name);
}
Patterns.ResizeArray(fileHeader.lastPattern + 1);
for(PATTERNINDEX pat = 0; pat < Patterns.Size(); pat++)
{
if(!(loadFlags & loadPatternData) || !file.CanRead(64 * 5 * fileHeader.numChannels) || !Patterns.Insert(pat, 64))
{
file.Skip(64 * 5 * fileHeader.numChannels);
continue;
}
for(ModCommand &m : Patterns[pat])
{
const auto [instr, note, vol, command, param] = file.ReadArray<uint8, 5>();
m.instr = instr;
if(note == 255)
m.note = NOTE_NOTECUT;
else if(note > 0 && note <= 96)
m.note = NOTE_MIDDLEC - 49 + note;
if(vol)
m.SetVolumeCommand(VOLCMD_VOLUME, std::min(vol, uint8(65)) - 1);
if(command > 0 && command < 0x0F)
ConvertModCommand(m, command - 1, param);
else if(command == 0x0F) // "Funky sync"
m.SetEffectCommand(CMD_DUMMY, param);
else if(command == 0x18)
m.SetEffectCommand(CMD_RETRIG, param);
else if(command >= 0x10 && command <= 0x1E)
m.SetEffectCommand(CMD_MODCMDEX, static_cast<ModCommand::PARAM>(((command << 4) + 0x10) | std::min(param, uint8(0x0F))));
else if(command == 0x1F)
m.SetEffectCommand(CMD_SPEED, param);
else if(command == 0x20)
m.SetEffectCommand(CMD_TEMPO, param);
m.ExtendedMODtoS3MEffect();
}
}
for(SAMPLEINDEX smp = 1; smp <= m_nSamples; smp++)
{
if(loadFlags & loadSampleData)
{
SampleIO(SampleIO::_8bit, SampleIO::mono, SampleIO::littleEndian, SampleIO::deltaPCM)
.ReadSample(Samples[smp], file);
} else
{
file.Skip(Samples[smp].nLength);
}
}
m_songMessage.Read(file, fileHeader.messageLength, SongMessage::leCRLF);
m_modFormat.formatName = UL_("Chuck Biscuits / Black Artist");
m_modFormat.type = UL_("cba");
m_modFormat.charset = mpt::Charset::CP437;
return true;
}
OPENMPT_NAMESPACE_END
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