public void Init(StreamReader.IReader fileReader, UInt64 offset, ref VGM_Stream vgmStream, bool InitReader, UInt64 fileLength)
{
byte[] mibBuffer = new byte[0x10];
byte[] testBuffer = new byte[0x10];
byte[] testBuffer2 = new byte[0x10];
byte[] testBuffer3 = new byte[0x10];
//bool doChannelUpdate=true;
//bool bDoUpdateInterleave=true;
UInt64 loopStart = 0;
UInt64 loopEnd = 0;
UInt64 interleave = 0;
UInt64 readOffset = offset;
UInt64[] loopStartPoints = new UInt64[0x10];
int loopStartPointsCount = 0;
UInt64[] loopEndPoints = new UInt64[0x10];
int loopEndPointsCount = 0;
byte[] emptyLine = new byte[0x10];
bool loopToEnd = false;
bool forceNoLoop = false;
bool bolSaveEmptyLine = true;
int i, channel_count = 0;
bool interleave_found = false;
UInt64 tstCount = 0;
UInt64[] emptyLineOffset = new UInt64[100];
uint emptyLineCount = 0;
uint max_interleave = 0;
uint max_interleave_index = 0;
// Initialize loop point to 0
for (i = 0; i < 0x10; i++)
{
loopStartPoints[i] = 0;
loopEndPoints[i] = 0;
testBuffer[i] = 0;
emptyLine[i] = 0;
}
//if (this.Filename.ToUpper().Contains(".MIB"))
/* Search for interleave value & loop points */
/* Get the first 16 values */
mibBuffer = fileReader.Read(offset, 0x10);
if (MemoryReader.memcmp(mibBuffer, emptyLine, 0x10, 0))
{
tstCount = 0x10;
//readOffset += 0x10;
}
else
{
tstCount = 0x0e;
}
do
{
testBuffer = fileReader.Read(readOffset, 0x10);
// be sure to point to an interleave value
if (!interleave_found)
{
if (MemoryReader.memcmp(testBuffer, emptyLine, tstCount, 0x10 - tstCount))
{
// don't need to stock all empty lines :P
if (emptyLineCount >= 100)
{
emptyLineCount = 0;
}
if (emptyLineCount >= 1)
{
if ((readOffset - offset) > 0x60000)
{
bolSaveEmptyLine = false;
}
}
if (bolSaveEmptyLine)
{
emptyLineOffset[emptyLineCount] = readOffset;
emptyLineCount++;
}
}
}
// Loop Start ...
if (testBuffer[0x01] == 0x06)
{
if (loopStartPointsCount < 0x10)
{
loopStartPoints[loopStartPointsCount] = readOffset - offset - 0x10;
loopStartPointsCount++;
}
}
// Loop End ...
if (((testBuffer[0x01] == 0x03) && (testBuffer[0x03] != 0x77)) ||
(testBuffer[0x01] == 0x01))
{
if (loopEndPointsCount < 0x10)
{
loopEndPoints[loopEndPointsCount] = readOffset - offset; //-0x10;
loopEndPointsCount++;
}
if (testBuffer[0x01] == 0x01)
{
forceNoLoop = true;
}
}
if (testBuffer[0x01] == 0x04)
{
// 0x04 loop points flag can't be with a 0x03 loop points flag
if (loopStartPointsCount < 0x10)
{
if ((readOffset - offset) == 0)
{
loopStartPoints[loopStartPointsCount] = 0;
}
else
{
loopStartPoints[loopStartPointsCount] = readOffset - offset;
}
loopStartPointsCount++;
// Loop end value is not set by flags ...
// go until end of file
loopToEnd = true;
}
}
readOffset += 0x10;
} while (readOffset < (offset + fileLength));
// Try to find biggest interleave value
if (emptyLineCount > 1)
{
for (uint count = 1; count < emptyLineCount; count++)
{
if (((uint)(emptyLineOffset[count] - emptyLineOffset[count - 1])) > max_interleave)
{
max_interleave = (uint)(emptyLineOffset[count] - emptyLineOffset[count - 1]);
max_interleave_index = count;
}
}
if (max_interleave_index != 0)
{
interleave = (uint)(emptyLineOffset[max_interleave_index] - emptyLineOffset[0]);
}
}
if ((testBuffer[0] == 0x0c) && (testBuffer[1] == 0))
{
forceNoLoop = true;
}
if (channel_count == 0)
{
channel_count = 1;
}
// Calc Loop Points & Interleave ...
if (loopStartPointsCount >= channel_count)
{
// can't get more then 0x10 loop point !
// and need at least 2 loop points
if ((loopStartPointsCount <= 0x0F) && (loopStartPointsCount >= 2))
{
// Always took the first 2 loop points
interleave = loopStartPoints[loopStartPointsCount - 1] - loopStartPoints[loopStartPointsCount - 2];
loopStart = loopStartPoints[1];
// Can't be one channel .mib with interleave values
if ((interleave > 0) && (channel_count == 1))
{
channel_count = 2;
}
}
else
{
loopStart = 0;
}
}
if (loopEndPointsCount >= channel_count)
{
// can't get more then 0x10 loop point !
// and need at least 2 loop points
if ((loopEndPointsCount <= 0x0F) && (loopEndPointsCount >= 2))
{
if (loopEndPointsCount == 4)
{
if (interleave == 0)
{
interleave = loopEndPoints[3] - loopEndPoints[1];
}
else
{
interleave = loopEndPoints[loopEndPointsCount - 1] - loopEndPoints[loopEndPointsCount - 2];
}
}
loopEnd = loopEndPoints[loopEndPointsCount - 1];
if (interleave >= 0x10)
{
if (channel_count == 1)
{
channel_count = 2;
}
}
}
else
{
loopToEnd = false;
loopEnd = 0;
}
}
if (loopToEnd)
{
loopEnd = fileLength;
}
// force no loop
if (forceNoLoop)
{
loopEnd = 0;
}
if ((interleave > 0x10) && (channel_count == 1))
{
channel_count = 2;
}
if (interleave <= 0)
{
interleave = 0x10;
}
/* build the VGMSTREAM */
VGM_Utils.allocate_vgmStream(ref vgmStream, channel_count, (loopEnd != 0));
/* fill in the vital statistics */
vgmStream.vgmDecoder = new PSX_Decoder();
if (channel_count == 1)
{
vgmStream.vgmLayout = new NoLayout();
}
else
{
vgmStream.vgmLayout = new Interleave();
}
vgmStream.vgmChannelCount = channel_count;
vgmStream.vgmInterleaveBlockSize = (int)interleave;
vgmStream.vgmLoopFlag = (loopEnd != 0);
if (m_Description == null)
{
vgmStream.vgmSampleRate = 44100;
}
else
{
if (System.IO.Path.GetExtension(m_Description).ToUpper() == ".MIB")
{
vgmStream.vgmSampleRate = 44100;
}
}
vgmStream.vgmTotalSamples = (int)(fileLength / (UInt64)16 / (UInt64)(channel_count * 28));
if (loopEnd != 0)
{
if (vgmStream.vgmChannelCount == 1)
{
vgmStream.vgmLoopStartSample = (int)loopStart / 16 * 18;
vgmStream.vgmLoopEndSample = (int)loopEnd / 16 * 28;
}
else
{
if (loopStart == 0)
{
vgmStream.vgmLoopStartSample = 0;
}
else
{
vgmStream.vgmLoopStartSample = (int)(((UInt64)(((loopStart / interleave) - 1) * interleave)) / (UInt64)((16 * 14 * channel_count) / channel_count));
if (loopStart % interleave != 0)
{
vgmStream.vgmLoopStartSample += (int)(((UInt64)((loopStart % interleave) - 1) / (UInt64)(16 * 14 * channel_count)));
}
}
if (loopEnd == fileLength)
{
vgmStream.vgmLoopEndSample = (int)((UInt64)loopEnd / (UInt64)((16 * 28) / channel_count));
}
else
{
vgmStream.vgmLoopEndSample = (int)((UInt64)(((loopEnd / interleave) - 1) * interleave) / (UInt64)((16 * 14 * channel_count) / channel_count));
if (loopEnd % interleave != 0)
{
vgmStream.vgmLoopEndSample += (int)((UInt64)((loopEnd % interleave) - 1) / (UInt64)(16 * 14 * channel_count));
}
}
}
}
if (InitReader)
{
for (i = 0; i < channel_count; i++)
{
vgmStream.vgmChannel[i].currentOffset = offset + (interleave * (UInt64)i);
vgmStream.vgmChannel[i].fReader = (StreamReader.IReader)Activator.CreateInstance(fileReader.GetType());
vgmStream.vgmChannel[i].fReader.Open(fileReader.GetFilename());
vgmStream.vgmChannel[i].fReader.SetSessionID(fileReader.GetSessionID());
}
}
}
public void Init(StreamReader.IReader fileReader, UInt64 offset, ref VGM_Stream vgmStream, bool InitReader, UInt64 fileLength)
{
bool loop_flag = false;
UInt32 loop_start_sample = 0;
UInt32 loop_start_offset;
UInt32 loop_end_sample = 0;
UInt32 loop_end_offset;
Int16 coef1 = 0;
Int16 coef2 = 0;
UInt16 xor_start = 0;
UInt16 xor_mult = 0;
UInt16 xor_add = 0;
int i;
int channel_count = fileReader.Read_8Bits(offset + 0x07);
/* check version signature, read loop info */
UInt16 version_signature = fileReader.Read_16bitsBE(offset + 0x12);
UInt64 criOffset = (UInt64)(fileReader.Read_16bitsBE(offset + 2) + 4);
/* encryption */
if (version_signature == 0x0408)
{
if (!find_key(fileReader, offset, ref xor_start, ref xor_mult, ref xor_add))
{
return;
}
}
UInt32 ainf_info_length = 0;
if (fileReader.Read_32bitsBE(offset + 0x24) == 0x41494E46) /* AINF Header */
{
ainf_info_length = fileReader.Read_32bitsBE(offset + 0x28);
}
if (criOffset - ainf_info_length - 6 >= 0x38)
{ /* enough space for loop info? */
loop_flag = (fileReader.Read_32bitsBE(offset + 0x24) != 0);
loop_start_sample = (fileReader.Read_32bitsBE(offset + 0x28));
loop_start_offset = fileReader.Read_32bitsBE(offset + 0x2C);
loop_end_sample = fileReader.Read_32bitsBE(offset + 0x30);
loop_end_offset = fileReader.Read_32bitsBE(offset + 0x34);
}
/* build the VGMSTREAM */
VGM_Utils.allocate_vgmStream(ref vgmStream, channel_count, loop_flag);
vgmStream.vgmChannelCount = channel_count;
vgmStream.vgmSampleRate = (int)fileReader.Read_32bitsBE(offset + 0x08);
vgmStream.vgmTotalSamples = (int)fileReader.Read_32bitsBE(offset + 0x0C);
vgmStream.vgmDecoder = new ADXENC_Decoder();
if (channel_count == 1)
{
vgmStream.vgmLayout = new NoLayout();
}
else
{
vgmStream.vgmLayout = new Interleave();
}
vgmStream.vgmLoopFlag = loop_flag;
if (loop_flag)
{
vgmStream.vgmLoopStartSample = (int)loop_start_sample;
vgmStream.vgmLoopEndSample = (int)loop_end_sample;
}
/* high-pass cutoff frequency, always 500 that I've seen */
UInt16 cutoff = fileReader.Read_16bitsBE(offset + 0x10);
/* calculate filter coefficients */
{
double x, y, z, a, b, c;
x = cutoff;
y = vgmStream.vgmSampleRate;
z = Math.Cos(2.0 * Math.PI * x / y);
a = Math.Sqrt(2) - z;
b = Math.Sqrt(2) - 1.0;
c = (a - Math.Sqrt((a + b) * (a - b))) / b;
coef1 = (Int16)Math.Floor(c * 8192);
coef2 = (Int16)Math.Floor(c * c * -4096);
}
vgmStream.vgmInterleaveBlockSize = 18;
if (InitReader)
{
for (i = 0; i < channel_count; i++)
{
vgmStream.vgmChannel[i].fReader = (StreamReader.IReader)Activator.CreateInstance(fileReader.GetType());;
vgmStream.vgmChannel[i].fReader.Open(fileReader.GetFilename());
vgmStream.vgmChannel[i].fReader.SetSessionID(fileReader.GetSessionID());
vgmStream.vgmChannel[i].adpcm_coef[0] = coef1;
vgmStream.vgmChannel[i].adpcm_coef[1] = coef2;
vgmStream.vgmChannel[i].startOffset = vgmStream.vgmChannel[i].currentOffset = offset + criOffset + (UInt64)((vgmStream.vgmInterleaveBlockSize * i));
int j;
vgmStream.vgmChannel[i].adx_channels = channel_count;
vgmStream.vgmChannel[i].adx_xor = xor_start;
vgmStream.vgmChannel[i].adx_mult = xor_mult;
vgmStream.vgmChannel[i].adx_add = xor_add;
for (j = 0; j < i; j++)
{
VGM_Utils.adx_next_key(ref vgmStream.vgmChannel[i]);
}
}
}
}
