static void CreateTestWAV()
{
Console.Write("Creating test.wav...");
opl3 opl = new opl3();
opl.OPL3_WriteRegBuffered(0x01, 0x20); //set WSE=1
waveheader head = new waveheader();
Int16[] buffer = new Int16[opl.SampleRate * 2]; //Muliply by 2 since it's stereo so 2 channels
using (FileStream fout = File.OpenWrite("test.wav"))
{
//write dummy wave header:
fout.Write(head.ToByteArray(), 0, 46);
//Command OPL to generate sound
//Commands taken from "Making a Sound" section of http://shipbrook.net/jeff/sb.html
opl.OPL3_WriteRegBuffered(0x20, 0x01);
opl.OPL3_WriteRegBuffered(0x40, 0x10);
opl.OPL3_WriteRegBuffered(0x60, 0xF0);
opl.OPL3_WriteRegBuffered(0x80, 0x77);
opl.OPL3_WriteRegBuffered(0xA0, 0x98);
opl.OPL3_WriteRegBuffered(0x23, 0x01);
opl.OPL3_WriteRegBuffered(0x43, 0x00);
opl.OPL3_WriteRegBuffered(0x63, 0xF0);
opl.OPL3_WriteRegBuffered(0x83, 0x77);
opl.OPL3_WriteRegBuffered(0xB0, 0x31);
opl.OPL3_GenerateStream(buffer, opl.SampleRate * 1); //generate 1 second worth of samples
fout.Write(GetBufferBytes(buffer), 0, (buffer.Length * sizeof(Int16)));
fout.Flush();
uint size = (uint)fout.Position;
//fill header with correct values:
head.dSize = size - 46;
head.rSize = size - 8;
head.fHertz = opl.SampleRate;
head.fBlockAlign = (ushort)(head.fChannels * (head.fBits / 8));
head.fBytesPerSec = head.fBlockAlign * opl.SampleRate;
//write real wave header:
fout.Seek(SEEK_SET, SeekOrigin.Begin);
fout.Write(head.ToByteArray(), 0, 46);
fout.Flush();
}
opl.OPL3_Reset();
Console.WriteLine("done!");
return;
}
public static void ConvertImf2Wav(string ImfFilePath, string WavFilePath)
{
Console.Write("Converting " + Path.GetFileName(ImfFilePath) + " to WAV...");
opl3 opl;
waveheader head = new waveheader();
UInt32 imf_rate = 560, wav_rate = DEF_FREQ, samples_per_tick;
imf_rate = 700;
samples_per_tick = wav_rate / imf_rate;
//if(YM3812Init(1, YM3812_RATE, wav_rate))
//{
// printf("Unable to create virtual OPL!!\n");
// return 1;
//}
opl = new opl3(wav_rate, 2);
opl.OPL3_WriteRegBuffered(1, 0x20); //set WSE=1
using (FileStream fin = File.OpenRead(ImfFilePath))
{
UInt32 size, cnt = 0, imfsize = 0xFFFFFFFF;
bool has_notes = false;
if (IMF_IsChunk(fin))
{
UInt16 size1 = ReadInt16LE(fin);
//Console.WriteLine("IMF size is " + size1 + " Bytes.");
imfsize = (uint)(size1 >> 2);
}
else
{
//Console.WriteLine("IMF size is not set.");
}
//Console.WriteLine("IMF rate is " + imf_rate + " Hz.");
//printf("Channel mask is 0x%X\n", channel_mask);
Int16[] buffer = new Int16[samples_per_tick * 2];
//Console.WriteLine("buffer allocated.\n");
//out = fopen(wavefile, "wb");
//if (out)
using (FileStream fout = File.OpenWrite(WavFilePath))
{
UInt16 imfdelay, imfcommand;
//printf("%s opened for output.\n", wavefile);
//Console.WriteLine("Converting IMF data to PCM data\n");
//write dummy wave header:
fout.Write(head.ToByteArray(), 0, 46);
int totalsamples = 0;
//write converted PCM data:
while (imfsize > 0)
{
imfsize--;
try
{
imfcommand = ReadInt16LE(fin);
imfdelay = ReadInt16LE(fin);
}
catch
{
break;
}
opl.OPL3_WriteRegBuffered((ushort)(imfcommand & 0xFF), (byte)((imfcommand >> 8) & 0xFF));
while (imfdelay-- > 0)
{
opl.OPL3_GenerateStream(buffer, samples_per_tick);
fout.Write(GetBufferBytes(buffer), 0, buffer.Length * sizeof(Int16));
fout.Flush();
totalsamples += (int)samples_per_tick;
}
//if (!(cnt++ & 0xff))
//{
// printf(".");
// fflush(stdout);
//}
}
//Console.WriteLine("done!");
//else
//{
// printf("ERROR: could not write %s\n", wavefile);
//}
//size = ftell(out);
size = (uint)fout.Position;
//fill header with correct values:
head.dSize = size - 46;
head.rSize = size - 8;
head.fHertz = wav_rate;
head.fBlockAlign = (ushort)(head.fChannels * (head.fBits / 8));
head.fBytesPerSec = head.fBlockAlign * wav_rate;
//write real wave header:
fout.Seek(SEEK_SET, SeekOrigin.Begin);
fout.Write(head.ToByteArray(), 0, 46);
fout.Flush();
}
//if (!has_notes)
//{
// printf("The song did not play any notes.\n");
// exit(1);
//}
//fclose(in);
}
//YM3812Shutdown();
opl.OPL3_Reset(wav_rate);
Console.WriteLine("done!");
return;
}
