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[][] ReadWaveFile(BinaryFile wavfile, ref int channels, ref int samplecount, ref int samplerate)
{
double[][] sound;
int i = 0;
int ic = 0;
int[] tag = new int[13];
// Size Description Value
// tag[0] 4 RIFF Header RIFF (1179011410)
// tag[1] 4 RIFF data size
// tag[2] 4 form-type (WAVE etc) (1163280727)
// tag[3] 4 Chunk ID "fmt " (0x666D7420) = 544501094
// tag[4] 4 Chunk Data Size 16 + extra format bytes
// tag[5] 2 Compression code 1 - 65,535
// tag[6] 2 Number of channels 1 - 65,535
// tag[7] 4 Sample rate 1 - 0xFFFFFFFF
// tag[8] 4 Average bytes per second 1 - 0xFFFFFFFF
// tag[9] 2 Block align 1 - 65,535 (4)
// tag[10] 2 Significant bits per sample 2 - 65,535 (32)
// tag[11] 4 IEEE = 1952670054 (0x74636166) = fact chunk
// PCM = 1635017060 (0x61746164) (datachunk = 1635017060)
// tag[12] 4 IEEE = 4 , PCM = 5292000 (0x0050BFE0)
#if DEBUG
Console.Write("ReadWaveFile...\n");
#endif
for (i = 0; i < 13; i++) // tag reading
{
tag[i] = 0;
if ((i == 5) || (i == 6) || (i == 9) || (i == 10))
{
tag[i] = GlobalMembersUtil.ReadUInt16(wavfile);
}
else
{
tag[i] = (int)GlobalMembersUtil.ReadUInt32(wavfile);
}
}
//********File format checking********
if (tag[0] != 1179011410 || tag[2] != 1163280727)
{
Console.Error.WriteLine("This file is not in WAVE format\n");
GlobalMembersUtil.WinReturn();
Environment.Exit(1);
}
if (tag[3] != 544501094 || tag[4] != 16 || tag[11] != 1635017060) //
{
Console.Error.WriteLine("This WAVE file format is not currently supported\n");
GlobalMembersUtil.WinReturn();
Environment.Exit(1);
}
if (tag[10] == 24)
{
Console.Error.WriteLine("24 bit PCM WAVE files is not currently supported\n");
GlobalMembersUtil.WinReturn();
Environment.Exit(1);
}
if (tag[5] != WAVE_FORMAT_PCM)
{
Console.Error.WriteLine("Non PCM WAVE files is not currently supported\n");
GlobalMembersUtil.WinReturn();
Environment.Exit(1);
}
//--------File format checking--------
channels = tag[6];
samplecount = tag[12] / (tag[10] / 8) / channels;
samplerate = tag[7];
sound = new double[channels][];
for (ic = 0; ic < channels; ic++)
{
sound[ic] = new double[samplecount];
}
//********Data loading********
if (tag[10] == 8)
{
Read8Bit(wavfile, sound, samplecount, channels);
}
if (tag[10] == 16)
{
Read16Bit(wavfile, sound, samplecount, channels);
}
if (tag[10] == 32)
{
if (tag[5] == WAVE_FORMAT_PCM)
{
Read32Bit(wavfile, sound, samplecount, channels);
}
else if (tag[5] == WAVE_FORMAT_IEEE_FLOAT)
{
Read32BitFloat(wavfile, sound, samplecount, channels);
}
}
//--------Data loading--------
wavfile.Close();
return(sound);
}