/*
* Native Formats
* Number of Bits MATLAB Data Type Data Range
* 8 uint8 (unsigned integer) 0 <= y <= 255
* 16 int16 (signed integer) -32768 <= y <= +32767
* 24 int32 (signed integer) -2^23 <= y <= 2^23-1
* 32 single (floating point) -1.0 <= y < +1.0
*
* typedef uint8_t u8_t; ///< unsigned 8-bit value (0 to 255)
* typedef int8_t s8_t; ///< signed 8-bit value (-128 to +127)
* typedef uint16_t u16_t; ///< unsigned 16-bit value (0 to 65535)
* typedef int16_t s16_t; ///< signed 16-bit value (-32768 to 32767)
* typedef uint32_t u32_t; ///< unsigned 32-bit value (0 to 4294967296)
* typedef int32_t s32_t; ///< signed 32-bit value (-2147483648 to +2147483647)
*/
public static void Read8Bit(BinaryFile wavfile, double[][] sound, int samplecount, int channels)
{
#if DEBUG
Console.Write("Read8Bit...\n");
#endif
for (int i = 0; i < samplecount; i++) {
for (int ic = 0; ic < channels; ic++)
{
byte @byte = wavfile.ReadByte();
sound[ic][i] = (double) @byte / 128.0 - 1.0;
}
}
}
public static void Read8Bit(BinaryFile wavfile, float[][] sound, int samplecount, int channels)
{
var i = new int();
var ic = new int();
byte @byte = new byte();
#if DEBUG
Console.Write("Read8Bit...\n");
#endif
for (i = 0; i < samplecount; i++)
{
for (ic = 0; ic < channels; ic++)
{
@byte = wavfile.ReadByte();
sound[ic][i] = (float)@byte / 128.0f - 1.0f;
}
}
}
/// <summary>
/// Seek in BinaryFile until pattern is found, return start index
/// </summary>
/// <param name="binaryFile">binaryFile</param>
/// <param name="pattern">byte pattern to find</param>
/// <param name="offset">offset to seek to (if > 0)</param>
/// <param name="maxEndIndex">optional end index within the BinaryFile</param>
/// <returns>index where found (BinaryFile position will be at this index)</returns>
public static int IndexOf(this BinaryFile binaryFile, byte[] pattern, int offset, int maxEndIndex = -1)
{
// seek to offset
if (offset > 0 && offset < binaryFile.Length)
{
binaryFile.Seek(offset, SeekOrigin.Begin);
}
int success = 0;
long remainingBytes = binaryFile.Length - binaryFile.Position;
if (maxEndIndex > 0)
{
remainingBytes = Math.Min(maxEndIndex, remainingBytes);
}
for (int i = 0; i < (int)remainingBytes; i++)
{
var b = binaryFile.ReadByte();
if (b == pattern[success])
{
success++;
}
else
{
success = 0;
}
if (pattern.Length == success)
{
int index = (int)(binaryFile.Position - pattern.Length);
binaryFile.Seek(index, SeekOrigin.Begin);
return(index);
}
}
return(-1);
}
public static double[][] BMPRead(BinaryFile bmpfile, ref int y, ref int x)
{
int iy = 0; // various iterators
int ix = 0;
int ic = 0;
int offset = 0;
double[][] image;
byte zerobytes = new byte();
byte val = new byte();
#if DEBUG
Console.Write("BMPRead...\n");
#endif
if (GlobalMembersUtil.ReadUInt16(bmpfile) != 19778) // "BM" format tag check
{
Console.Error.WriteLine("This file is not in BMP format\n");
GlobalMembersUtil.WinReturn();
Environment.Exit(1);
}
bmpfile.Seek(8, SeekOrigin.Current); // skipping useless tags
offset = (int) GlobalMembersUtil.ReadUInt32(bmpfile) - 54; // header offset
bmpfile.Seek(4, SeekOrigin.Current); // skipping useless tags
x = (int) GlobalMembersUtil.ReadUInt32(bmpfile);
y = (int) GlobalMembersUtil.ReadUInt32(bmpfile);
bmpfile.Seek(2, SeekOrigin.Current); // skipping useless tags
if (GlobalMembersUtil.ReadUInt16(bmpfile) != 24) // Only format supported
{
Console.Error.WriteLine("Wrong BMP format, BMP images must be in 24-bit colour\n");
GlobalMembersUtil.WinReturn();
Environment.Exit(1);
}
bmpfile.Seek(24+offset, SeekOrigin.Current); // skipping useless tags
// image allocation
image = new double[y][];
for (iy = 0; iy< y; iy++) {
image[iy] = new double[x];
}
zerobytes = (byte)(4 - ((x *3) & 3));
if (zerobytes == 4) {
zerobytes = 0;
}
for (iy = y-1; iy!=-1; iy--) { // backwards reading
for (ix = 0; ix< x; ix++) {
for (ic = 2;ic!=-1;ic--) {
val = bmpfile.ReadByte();
image[iy][ix] += (double) val * (1.0/(255.0 * 3.0)); // Conversion to grey by averaging the three channels
}
}
bmpfile.Seek(zerobytes, SeekOrigin.Current); // skipping padding bytes
}
bmpfile.Close();
return image;
}
public static double[][] ReadBMPGrayscale(string filePath)
{
double[][] image;
var bmpfile = new BinaryFile(filePath);
// "BM" format tag check
if (!"BM".Equals(bmpfile.ReadString(2)))
{
Console.Error.WriteLine("This file is not in BMP format");
return(null);
}
bmpfile.Seek(8, SeekOrigin.Current); // skipping useless tags
int offset = (int)bmpfile.ReadUInt32() - 54; // header offset
bmpfile.Seek(4, SeekOrigin.Current); // skipping useless tags
int x = (int)bmpfile.ReadUInt32();
int y = (int)bmpfile.ReadUInt32();
bmpfile.Seek(2, SeekOrigin.Current); // skipping useless tags
int bitDepth = bmpfile.ReadUInt16();
int numBytes = bitDepth / 8;
bmpfile.Seek(24 + offset, SeekOrigin.Current); // skipping useless tags
// image allocation
image = new double[y][];
// initialise jagged array
for (int iy = 0; iy < y; iy++)
{
image[iy] = new double[x];
}
// calculate zero bytes (bytes to skip at the end of each bitmap line)
int zerobytes = (byte)(4 - ((x * numBytes) & numBytes));
if (zerobytes == 4)
{
zerobytes = 0;
}
// backwards reading
for (int iy = y - 1; iy != -1; iy--)
{
for (int ix = 0; ix < x; ix++)
{
for (int ic = numBytes - 1; ic != -1; ic--)
{
int val = bmpfile.ReadByte();
if (ic == 0 && numBytes == 4)
{
// if reading 32 bit, ignore the alpha bit
}
else
{
// Conversion to grey by averaging the three channels
image[iy][ix] += (double)val * (1.0 / (255.0 * 3.0));
}
}
}
bmpfile.Seek(zerobytes, SeekOrigin.Current); // skipping padding bytes
}
bmpfile.Close();
return(image);
}
public bool Process()
{
int bytespersec = 0;
int byteread = 0;
bool isPCM = false;
var listinfo = new Dictionary <string, string>();
for (int i = 0; i < infotype.Length; i++)
{
listinfo.Add(infotype[i], infodesc[i]);
}
var bf = new BinaryFile(selectedFile);
try {
var fileInfo = new FileInfo(selectedFile);
fileLength = fileInfo.Length;
int chunkSize = 0, infochunksize = 0, bytecount = 0, listbytecount = 0;
string sfield = "", infofield = "", infodescription = "", infodata = "";
/* -------- Get RIFF chunk header --------- */
sfield = bf.ReadString(4);
#if DEBUG
Console.WriteLine("RIFF Header: {0}", sfield);
#endif
if (sfield != "RIFF")
{
Console.WriteLine(" **** Not a valid RIFF file ****");
return(false);
}
// read RIFF data size
chunkSize = bf.ReadInt32();
#if DEBUG
Console.WriteLine("RIFF data size: {0}", chunkSize);
#endif
// read form-type (WAVE etc)
sfield = bf.ReadString(4);
#if DEBUG
Console.WriteLine("Form-type: {0}", sfield);
#endif
riffDataSize = chunkSize;
bytecount = 4; // initialize bytecount to include RIFF form-type bytes.
while (bytecount < riffDataSize) // check for chunks inside RIFF data area.
{
sfield = "";
int firstbyte = bf.ReadByte();
if (firstbyte == 0) // if previous data had odd bytecount, was padded by null so skip
{
bytecount++;
continue;
}
sfield += (char)firstbyte; // if we have a new chunk
for (int i = 1; i <= 3; i++)
{
sfield += (char)bf.ReadByte();
}
chunkSize = 0;
chunkSize = bf.ReadInt32();
bytecount += (8 + chunkSize);
#if DEBUG
Console.WriteLine("{0} ----- data size: {1} bytes", sfield, chunkSize);
#endif
if (sfield == "data")
{
//get data size to compute duration later.
dataSize = chunkSize;
}
if (sfield == "fmt ")
{
/*
* Offset Size Description Value
* 0x00 4 Chunk ID "fmt " (0x666D7420)
* 0x04 4 Chunk Data Size 16 + extra format bytes
* 0x08 2 Compression code 1 - 65,535
* 0x0a 2 Number of channels 1 - 65,535
* 0x0c 4 Sample rate 1 - 0xFFFFFFFF
* 0x10 4 Average bytes per second 1 - 0xFFFFFFFF
* 0x14 2 Block align 1 - 65,535
* 0x16 2 Significant bits per sample 2 - 65,535
* 0x18 2 Extra format bytes 0 - 65,535
* 0x1a
* Extra format bytes *
*/
// extract info from "format" chunk.
if (chunkSize < 16)
{
Console.WriteLine(" **** Not a valid fmt chunk ****");
return(false);
}
// Read compression code, 2 bytes
wFormatTag = bf.ReadInt16();
switch (wFormatTag)
{
case WAVE_FORMAT_PCM:
case WAVE_FORMAT_EXTENSIBLE:
case WAVE_FORMAT_IEEE_FLOAT:
isPCM = true;
break;
}
switch (wFormatTag)
{
case WAVE_FORMAT_PCM:
Console.WriteLine("\twFormatTag: WAVE_FORMAT_PCM");
break;
case WAVE_FORMAT_EXTENSIBLE:
Console.WriteLine("\twFormatTag: WAVE_FORMAT_EXTENSIBLE");
break;
case WAVE_FORMAT_IEEE_FLOAT:
Console.WriteLine("\twFormatTag: WAVE_FORMAT_IEEE_FLOAT");
break;
case WAVE_FORMAT_MPEGLAYER3:
Console.WriteLine("\twFormatTag: WAVE_FORMAT_MPEGLAYER3");
break;
default:
Console.WriteLine("\twFormatTag: non-PCM format {0}", wFormatTag);
break;
}
// Read number of channels, 2 bytes
nChannels = bf.ReadInt16();
#if DEBUG
Console.WriteLine("\tnChannels: {0}", nChannels);
#endif
// Read sample rate, 4 bytes
nSamplesPerSec = bf.ReadInt32();
#if DEBUG
Console.WriteLine("\tnSamplesPerSec: {0}", nSamplesPerSec);
#endif
// Read average bytes per second, 4 bytes
nAvgBytesPerSec = bf.ReadInt32();
bytespersec = nAvgBytesPerSec;
#if DEBUG
Console.WriteLine("\tnAvgBytesPerSec: {0}", nAvgBytesPerSec);
#endif
// Read block align, 2 bytes
nBlockAlign = bf.ReadInt16();
#if DEBUG
Console.WriteLine("\tnBlockAlign: {0}", nBlockAlign);
#endif
// Read significant bits per sample, 2 bytes
if (isPCM) // if PCM or EXTENSIBLE format
{
wBitsPerSample = bf.ReadInt16();
#if DEBUG
Console.WriteLine("\twBitsPerSample: {0}", wBitsPerSample);
#endif
}
else
{
bf.ReadBytes(2);
wBitsPerSample = 0;
}
//skip over any extra bytes in format specific field.
bf.ReadBytes(chunkSize - 16);
}
else if (sfield == "LIST")
{
String listtype = bf.ReadString(4);
// skip over LIST chunks which don't contain INFO subchunks
if (listtype != "INFO")
{
bf.ReadBytes(chunkSize - 4);
continue;
}
try {
listbytecount = 4;
#if DEBUG
Console.WriteLine("------- INFO chunks: {0} bytes -------", chunkSize);
#endif
// iterate over all entries in LIST chunk
while (listbytecount < chunkSize)
{
infofield = "";
infodescription = "";
infodata = "";
firstbyte = bf.ReadByte();
// if previous data had odd bytecount, was padded by null so skip
if (firstbyte == 0)
{
listbytecount++;
continue;
}
// if firstbyte is not an alpha char, read one more byte
if (!Char.IsLetterOrDigit((char)firstbyte))
{
firstbyte = bf.ReadByte();
listbytecount++;
}
// if we have a new chunk
infofield += (char)firstbyte;
for (int i = 1; i <= 3; i++) //get the remaining part of info chunk name ID
{
infofield += (char)bf.ReadByte();
}
// get the info chunk data byte size
infochunksize = bf.ReadInt32();
listbytecount += (8 + infochunksize);
//Console.WriteLine("infofield: {0}, listbytecount: {1}, infochunksize: {2}", infofield, listbytecount, infochunksize);
if (listbytecount > chunkSize)
{
bf.SetPosition(bf.GetPosition() - 8);
break;
}
// get the info chunk data
for (int i = 0; i < infochunksize; i++)
{
byteread = bf.ReadByte();
if (byteread == 0) // if null byte in string, ignore it
{
continue;
}
infodata += (char)byteread;
}
int unknownCount = 1;
try {
infodescription = (string)listinfo[infofield];
} catch (KeyNotFoundException) {}
if (infodescription != null)
{
#if DEBUG
Console.WriteLine("{0} ({1}) = {2}", infofield, infodescription, infodata);
#endif
InfoChunks.Add(infodescription, infodata);
}
else
{
#if DEBUG
Console.WriteLine("unknown: {0} = {1}", infofield, infodata);
#endif
InfoChunks.Add(String.Format("unknown{0}", unknownCount), infodata);
unknownCount++;
}
} //------- end iteration over LIST chunk ------------
} catch (Exception) {;
// don't care about these?
//Console.WriteLine("Error: {0}", e.ToString());
}
#if DEBUG
Console.WriteLine("------- end INFO chunks -------");
#endif
}
else
{
if (sfield.Equals("data"))
{
sampleCount = (int)dataSize / (wBitsPerSample / 8) / nChannels;
soundData = new float[nChannels][];
for (int ic = 0; ic < nChannels; ic++)
{
soundData[ic] = new float[sampleCount];
}
//********Data loading********
if (BitsPerSample == 8)
{
Read8Bit(bf, soundData, sampleCount, nChannels);
}
if (BitsPerSample == 16)
{
Read16Bit(bf, soundData, sampleCount, nChannels);
}
if (BitsPerSample == 32)
{
if (wFormatTag == WAVE_FORMAT_PCM)
{
Read32Bit(bf, soundData, sampleCount, nChannels);
}
else if (wFormatTag == WAVE_FORMAT_IEEE_FLOAT)
{
Read32BitFloat(bf, soundData, sampleCount, nChannels);
}
}
}
else
{
// if NOT the fmt or LIST chunks skip data
bf.ReadBytes(chunkSize);
}
}
} // end while.
//----------- End of chunk iteration -------------
if (isPCM && dataSize > 0) // compute duration of PCM wave file
{
long waveduration = 1000L * dataSize / bytespersec; // in msec units
long mins = waveduration / 60000; // integer minutes
double secs = 0.001 * (waveduration % 60000); //double secs.
#if DEBUG
Console.WriteLine("wav duration: {0} mins {1} sec", mins, secs);
#endif
}
#if DEBUG
Console.WriteLine("Final RIFF data bytecount: {0}", bytecount);
#endif
if ((8 + bytecount) != (int)fileLength)
{
Console.WriteLine("!!!!!!! Problem with file structure !!!!!!!!!");
return(false);
}
else
{
#if DEBUG
Console.WriteLine("File chunk structure consistent with valid RIFF");
#endif
}
return(true);
} catch (Exception e) {
Console.WriteLine("Error: {0}", e.ToString());
return(false);
} finally {
// close all streams.
bf.Close();
}
}
public bool Read(string filePath)
{
if (File.Exists(filePath)) {
string fileName = Path.GetFileNameWithoutExtension(filePath);
PresetName = fileName;
BinaryFile bFile = new BinaryFile(filePath, BinaryFile.ByteOrder.BigEndian);
string firstChunkID = bFile.ReadString(4); // chunk ID = "FORM"
int ckSize = bFile.ReadInt32();
string formType = bFile.ReadString(4);
// read first data chunk
string chunkID = bFile.ReadString(4);
// if chunkID == "COMT" then CommentsChunk
if (chunkID.Equals("COMT")) {
long curposTmpComt = bFile.GetPosition();
bFile.Seek(curposTmpComt-4);
// CommentsChunk
string chunkIDComt = bFile.ReadString(4); // chunk ID = "COMT"
int chunkSizeComt = bFile.ReadInt32();
int numComments = bFile.ReadUInt16();
long curposTmpComt2 = bFile.GetPosition();
//comments = bFile.ReadString(chunkSizeComt-2);
for (int i = 0; i < numComments; i++) {
int commentTimestamp = (int) bFile.ReadUInt32();
string marker = bFile.ReadString(4);
int count = (int) bFile.ReadByte();
comments.Add(bFile.ReadString(count));
}
bFile.Seek(curposTmpComt2+chunkSizeComt-2);
}
string chunkID2 = bFile.ReadString(4);
// if chunkID2 == "COMM" then CommonChunk
if (chunkID2.Equals("COMM")) {
long curposTmpComm = bFile.GetPosition();
bFile.Seek(curposTmpComm-4);
// CommonChunk
string chunkIDComm = bFile.ReadString(4); // chunk ID = "COMM"
int chunkSizeComm = bFile.ReadInt32();
channels = bFile.ReadInt16();
numSampleFrames = (int) bFile.ReadUInt32();
bitsPerSample = bFile.ReadInt16();
// read IEEE 80-bit extended double precision
byte[] sampleRateBytes = bFile.ReadBytes(0, 10, BinaryFile.ByteOrder.LittleEndian);
double sampleRateDouble = NAudio.Utils.IEEE.ConvertFromIeeeExtended(sampleRateBytes);
sampleRate = (int) sampleRateDouble;
}
string chunkID3 = bFile.ReadString(4);
// if chunkID3 == "SSND" then SoundDataChunk
if (chunkID3.Equals("SSND")) {
long curposTmpSsnd = bFile.GetPosition();
bFile.Seek(curposTmpSsnd-4);
// SoundDataChunk
string chunkIDSsnd = bFile.ReadString(4); // chunk ID = "SSND"
int chunkSizeSsnd = bFile.ReadInt32();
int offset = (int) bFile.ReadUInt32();
int blocksize = (int) bFile.ReadUInt32();
byte[] data = bFile.ReadBytes(offset, chunkSizeSsnd-8, BinaryFile.ByteOrder.LittleEndian);
// swap waveform data
WaveformData = SwapAiffEndian(data);
}
bFile.Close();
return true;
} else {
return false;
}
}
public bool Process()
{
int bytespersec = 0;
int byteread = 0;
bool isPCM = false;
Dictionary <string,string>listinfo = new Dictionary<string,string>();
for (int i=0; i<infotype.Length; i++) {
listinfo.Add(infotype[i], infodesc[i]);
}
BinaryFile bf = new BinaryFile(selectedFile);
try {
FileInfo fileInfo = new FileInfo(selectedFile);
fileLength = fileInfo.Length;
int chunkSize=0, infochunksize=0, bytecount=0, listbytecount=0;
string sfield="", infofield="", infodescription="", infodata="";
/* -------- Get RIFF chunk header --------- */
sfield = bf.ReadString(4);
#if DEBUG
Console.WriteLine("RIFF Header: {0}", sfield);
#endif
if (sfield != "RIFF") {
Console.WriteLine(" **** Not a valid RIFF file ****");
return false;
}
// read RIFF data size
chunkSize = bf.ReadInt32();
#if DEBUG
Console.WriteLine("RIFF data size: {0}", chunkSize);
#endif
// read form-type (WAVE etc)
sfield = bf.ReadString(4);
#if DEBUG
Console.WriteLine("Form-type: {0}", sfield);
#endif
riffDataSize = chunkSize;
bytecount = 4; // initialize bytecount to include RIFF form-type bytes.
while (bytecount < riffDataSize ) { // check for chunks inside RIFF data area.
sfield="";
int firstbyte = bf.ReadByte() ;
if (firstbyte == 0) { // if previous data had odd bytecount, was padded by null so skip
bytecount++;
continue;
}
sfield+= (char) firstbyte; // if we have a new chunk
for (int i=1; i<=3; i++) {
sfield += (char) bf.ReadByte() ;
}
chunkSize = 0;
chunkSize = bf.ReadInt32();
bytecount += ( 8 + chunkSize );
#if DEBUG
Console.WriteLine("{0} ----- data size: {1} bytes", sfield, chunkSize);
#endif
if (sfield == "data") {
//get data size to compute duration later.
dataSize = chunkSize;
}
if (sfield == "fmt ") {
/*
Offset Size Description Value
0x00 4 Chunk ID "fmt " (0x666D7420)
0x04 4 Chunk Data Size 16 + extra format bytes
0x08 2 Compression code 1 - 65,535
0x0a 2 Number of channels 1 - 65,535
0x0c 4 Sample rate 1 - 0xFFFFFFFF
0x10 4 Average bytes per second 1 - 0xFFFFFFFF
0x14 2 Block align 1 - 65,535
0x16 2 Significant bits per sample 2 - 65,535
0x18 2 Extra format bytes 0 - 65,535
0x1a
Extra format bytes *
*/
// extract info from "format" chunk.
if (chunkSize < 16) {
Console.WriteLine(" **** Not a valid fmt chunk ****");
return false;
}
// Read compression code, 2 bytes
wFormatTag = bf.ReadInt16();
if (wFormatTag == WAVE_FORMAT_PCM || wFormatTag == WAVE_FORMAT_EXTENSIBLE || wFormatTag == WAVE_FORMAT_IEEE_FLOAT) {
isPCM = true;
}
if (wFormatTag == WAVE_FORMAT_PCM) {
#if DEBUG
Console.WriteLine("\twFormatTag: WAVE_FORMAT_PCM") ;
#endif
} else if (wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
#if DEBUG
Console.WriteLine("\twFormatTag: WAVE_FORMAT_EXTENSIBLE") ;
#endif
} else if (wFormatTag == WAVE_FORMAT_IEEE_FLOAT) {
#if DEBUG
Console.WriteLine("\twFormatTag: WAVE_FORMAT_IEEE_FLOAT") ;
#endif
} else if (wFormatTag == WAVE_FORMAT_MPEGLAYER3) {
#if DEBUG
Console.WriteLine("\twFormatTag: WAVE_FORMAT_MPEGLAYER3") ;
#endif
} else {
#if DEBUG
Console.WriteLine("\twFormatTag: non-PCM format {0}", wFormatTag) ;
#endif
}
// Read number of channels, 2 bytes
nChannels = bf.ReadInt16();
#if DEBUG
Console.WriteLine("\tnChannels: {0}", nChannels);
#endif
// Read sample rate, 4 bytes
nSamplesPerSec = bf.ReadInt32();
#if DEBUG
Console.WriteLine("\tnSamplesPerSec: {0}", nSamplesPerSec);
#endif
// Read average bytes per second, 4 bytes
nAvgBytesPerSec = bf.ReadInt32();
bytespersec = nAvgBytesPerSec;
#if DEBUG
Console.WriteLine("\tnAvgBytesPerSec: {0}", nAvgBytesPerSec);
#endif
// Read block align, 2 bytes
nBlockAlign = bf.ReadInt16();
#if DEBUG
Console.WriteLine("\tnBlockAlign: {0}", nBlockAlign);
#endif
// Read significant bits per sample, 2 bytes
if (isPCM) { // if PCM or EXTENSIBLE format
wBitsPerSample = bf.ReadInt16();
#if DEBUG
Console.WriteLine("\twBitsPerSample: {0}", wBitsPerSample);
#endif
} else {
bf.ReadBytes(2);
wBitsPerSample = 0;
}
//skip over any extra bytes in format specific field.
bf.ReadBytes(chunkSize - 16);
} else if (sfield == "LIST") {
String listtype = bf.ReadString(4);
// skip over LIST chunks which don't contain INFO subchunks
if (listtype != "INFO") {
bf.ReadBytes(chunkSize - 4);
continue;
}
try {
listbytecount = 4;
#if DEBUG
Console.WriteLine("------- INFO chunks: {0} bytes -------", chunkSize);
#endif
// iterate over all entries in LIST chunk
while (listbytecount < chunkSize) {
infofield = "";
infodescription = "";
infodata = "";
firstbyte = bf.ReadByte();
// if previous data had odd bytecount, was padded by null so skip
if (firstbyte == 0) {
listbytecount++;
continue;
}
// if firstbyte is not an alpha char, read one more byte
if (!Char.IsLetterOrDigit( (char) firstbyte )) {
firstbyte = bf.ReadByte();
listbytecount++;
}
// if we have a new chunk
infofield += (char) firstbyte;
for (int i=1; i<=3; i++) { //get the remaining part of info chunk name ID
infofield += (char) bf.ReadByte() ;
}
// get the info chunk data byte size
infochunksize = bf.ReadInt32();
listbytecount += ( 8 + infochunksize );
//Console.WriteLine("infofield: {0}, listbytecount: {1}, infochunksize: {2}", infofield, listbytecount, infochunksize);
if (listbytecount > chunkSize) {
bf.SetPosition(bf.GetPosition() - 8);
break;
}
// get the info chunk data
for (int i=0; i < infochunksize; i++) {
byteread = bf.ReadByte();
if (byteread == 0) { // if null byte in string, ignore it
continue;
}
infodata += (char) byteread;
}
int unknownCount = 1;
try {
infodescription = (string) listinfo[infofield];
} catch (KeyNotFoundException) {}
if (infodescription != null) {
#if DEBUG
Console.WriteLine("{0} ({1}) = {2}", infofield, infodescription, infodata);
#endif
InfoChunks.Add(infodescription, infodata);
} else {
#if DEBUG
Console.WriteLine("unknown: {0} = {1}", infofield, infodata);
#endif
InfoChunks.Add(String.Format("unknown{0}", unknownCount), infodata);
unknownCount++;
}
} //------- end iteration over LIST chunk ------------
} catch (Exception) {;
// don't care about these?
//Console.WriteLine("Error: {0}", e.ToString());
}
#if DEBUG
Console.WriteLine("------- end INFO chunks -------");
#endif
} else {
if (sfield.Equals("data")) {
sampleCount = (int) dataSize / (wBitsPerSample / 8) / nChannels;
soundData = new float[nChannels][];
for (int ic = 0; ic < nChannels; ic++) {
soundData[ic] = new float[sampleCount];
}
//********Data loading********
if (BitsPerSample == 8) {
Read8Bit(bf, soundData, sampleCount, nChannels);
}
if (BitsPerSample == 16) {
Read16Bit(bf, soundData, sampleCount, nChannels);
}
if (BitsPerSample == 32) {
if (wFormatTag == WAVE_FORMAT_PCM) {
Read32Bit(bf, soundData, sampleCount, nChannels);
} else if (wFormatTag == WAVE_FORMAT_IEEE_FLOAT) {
Read32BitFloat(bf, soundData, sampleCount, nChannels);
}
}
} else {
// if NOT the fmt or LIST chunks skip data
bf.ReadBytes(chunkSize);
}
}
} // end while.
//----------- End of chunk iteration -------------
if(isPCM && dataSize > 0) { // compute duration of PCM wave file
long waveduration = 1000L * dataSize / bytespersec; // in msec units
long mins = waveduration / 60000; // integer minutes
double secs = 0.001 * (waveduration % 60000); //double secs.
#if DEBUG
Console.WriteLine("wav duration: {0} mins {1} sec", mins, secs);
#endif
}
#if DEBUG
Console.WriteLine("Final RIFF data bytecount: {0}", bytecount);
#endif
if ( ( 8 + bytecount) != (int) fileLength) {
Console.WriteLine("!!!!!!! Problem with file structure !!!!!!!!!");
return false;
} else {
#if DEBUG
Console.WriteLine("File chunk structure consistent with valid RIFF") ;
#endif
}
return true;
} catch (Exception e) {
Console.WriteLine("Error: {0}", e.ToString()) ;
return false;
} finally {
// close all streams.
bf.Close();
}
}
public static void Read8Bit(BinaryFile wavfile, float[][] sound, Int32 samplecount, Int32 channels)
{
Int32 i = new Int32();
Int32 ic = new Int32();
byte @byte = new byte();
#if DEBUG
Console.Write("Read8Bit...\n");
#endif
for (i = 0; i<samplecount; i++) {
for (ic = 0;ic<channels;ic++)
{
@byte = wavfile.ReadByte();
sound[ic][i] = (float) @byte/128.0f - 1.0f;
}
}
}