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// CSndResource.cpp

// stackimport

// Created by Uli Kusterer on 2013-12-30.

#include "CSndResource.h"

// No-op for now, as the Resource Manager pre-swaps the 'snd ' resource for us:

// But once we're using our own res-fork-reading code, map these to BIG_ENDIAN_xx.

#define BE16(n) n

#define BE32(n) n

CSoundCommand::CSoundCommand( uint16_t inCommandType, uint16_t inParam1, uint32_t inParam2, const char* inData, size_t inDataLen )

: commandType(inCommandType), param1(inParam1), param2(inParam2)

{

mResData = inData;

mResDataLen = inDataLen;

}

size_t CSoundCommand::GetSoundHeaderOffset()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

return param2;

}

uint32_t CSoundCommand::GetNumBytesInSample()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

const char* theData = mResData +param2 +4; // Sound data, then skip pointer for use in RAM.

return BE32( (*(uint32_t*)theData) );

}

uint32_t CSoundCommand::GetSampleRate()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

const char* theData = mResData +param2 +4 +4; // Sound data, then skip pointer for use in RAM, then bytes in sample.

return BE32( (*(uint32_t*)theData) );

}

uint32_t CSoundCommand::GetLoopPointStart()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

const char* theData = mResData +param2 +4 +4 +4; // Sound data, then skip pointer for use in RAM, bytes in sample, sample rate.

return BE32( (*(uint32_t*)theData) );

}

uint32_t CSoundCommand::GetLoopPointEnd()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

const char* theData = mResData +param2 +4 +4 +4 +4; // Sound data, then skip pointer for use in RAM, bytes in sample, sample rate, loop point start.

return BE32( (*(uint32_t*)theData) );

}

uint8_t CSoundCommand::GetStandardSampleEncoding()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

const char* theData = mResData +param2 +4 +4 +4 +4 +4; // Sound data, then skip pointer for use in RAM, bytes in sample, sample rate, loop point start/end.

return BE32( (*(uint8_t*)theData) );

}

uint8_t CSoundCommand::GetBaseFrequency()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return 0;

const char* theData = mResData +param2 +4 +4 +4 +4 +4 +1; // Sound data, then skip pointer for use in RAM, bytes in sample, sample rate, loop point start/end, standard sample encoding.

return BE32( (*(uint8_t*)theData) );

}

const char* CSoundCommand::GetSampleData()

{

if( commandType != 0x8050 && commandType != 0x8051 ) // Neither soundCmd nor bufferCmd?

return NULL;

const char* theData = mResData +param2 +4 +4 +4 +4 +4 +1 +1; // Sound data, then skip pointer for use in RAM, bytes in sample, sample rate, loop point start/end, standard sample encoding, base frequency.

return theData;

}

CSndResource::CSndResource( const char* inData, size_t dataLen )

: mResData(inData), mResDataLen(dataLen)

{

}

uint16_t CSndResource::GetFormat()

{

return BE16((*(uint16_t*)mResData));

}

uint16_t CSndResource::GetNumSoundCommands()

{

switch( GetFormat() )

{

case 2:

{

const char* theData = mResData +2 +2; // Skip type & refCount.

return BE16((*(uint16_t*)theData));

break;

}

return 0;

}

CSoundCommand CSndResource::GetSoundCommandAtIndex( size_t inIndex )

{

const char* theData = mResData +2 +2 +2; // Skip type, refCount & number of commands.

theData += inIndex * 8;

CSoundCommand theCmd( BE16((*(uint16_t*)theData)), BE16((*(uint16_t*)(theData +2))), BE16((*(uint32_t*)(theData +2 +2))), mResData, mResDataLen );

return theCmd;

}

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