public static void StreamThroughWaveFile(string sFileName, IReadWaveData objCallback)
{
using (FileStream fs = new FileStream(sFileName, FileMode.Open, FileAccess.Read))
using (BufferedStream bs = new BufferedStream(fs, nBufferSize))
using (BinaryReader r = new BinaryReader(bs))
{
StreamThroughWaveFile(r, objCallback);
}
}
public static void StreamThroughWaveFile(string sFileName,IReadWaveData objCallback)
{
using (FileStream fs = new FileStream(sFileName,FileMode.Open,FileAccess.Read))
using (BufferedStream bs = new BufferedStream(fs, nBufferSize))
using (BinaryReader r = new BinaryReader(bs))
{
StreamThroughWaveFile(r, objCallback);
}
}
public static void StreamThroughWaveFile(BinaryReader r, IReadWaveData objCallback)
{
bool bRaw = objCallback.PreferRawSample();
CWavStreamReadHeaders winfo = CWavStreamReadHeaders.ReadWavStreamReadHeaders(r);
if (winfo.nAudioFormat != 1)
{
throw new WavCutException("Only audio format 1 is supported");
}
if (winfo.nSampleRate != 44100)
{
throw new WavCutException("expect samplerate==44100");
}
if (winfo.nBitsPerSample != 16)
{
throw new WavCutException("expect nBitsPerSample==16");
}
if (winfo.nChannels != 2)
{
throw new WavCutException("expect nChannels==2");
}
uint nDataSize = 0;
while (true)
{
// Go through chunks. We are looking for "data" chunk
string sDatatag = new string(r.ReadChars(4));
nDataSize = r.ReadUInt32();
if (nDataSize > int.MaxValue)
{
throw new WavCutException("File too large.");
}
if (sDatatag == "data") // found the data section
{
break;
}
else // something else, continue looping
{
r.BaseStream.Seek(nDataSize, SeekOrigin.Current);
}
}
uint nLengthOfDataChunk = (uint)(nDataSize / (winfo.nChannels * (winfo.nBitsPerSample / 8)));
int nSample = 0;
const int nReadsize = 1024;
bool bComplete = false;
// loop through wave until we reach the expected number of samples.
// we should not read until eof because there might be a later riff chunk.
while (!bComplete)
{
byte[] rawdata = r.ReadBytes((int)nReadsize);
if (rawdata == null || rawdata.Length == 0)
{
break;
}
for (int j = 0; j < rawdata.Length; j += 4)
{
if (bRaw)
{
objCallback.ReceiveRawSample(rawdata[j], rawdata[j + 1], rawdata[j + 2], rawdata[j + 3]);
}
else
{
short sha1 = rawdata[j + 0]; // intel byte order
short sha2 = (short)(((short)rawdata[j + 1]) << 8);
short sha = (short)(sha1 + sha2);
double sa = sha / ((double)short.MaxValue);
short shb1 = rawdata[j + 2]; // intel byte order
short shb2 = (short)(((short)rawdata[j + 3]) << 8);
short shb = (short)(sha1 + sha2);
double sb = shb / ((double)short.MaxValue);
if (sa != sb)
{
throw new WavCutException("different here");
}
objCallback.ReceiveProcessedSample(sa, sb);
}
nSample++;
if (nSample >= nLengthOfDataChunk)
{
bComplete = true;
break;
}
}
}
if (nSample != nLengthOfDataChunk)
{
Console.WriteLine("warning: eof reached earlier than expected. Expected " + nLengthOfDataChunk + " got " + nSample);
}
objCallback.OnFinished();
}
public static void StreamThroughWaveFile(BinaryReader r,IReadWaveData objCallback)
{
bool bRaw = objCallback.PreferRawSample();
CWavStreamReadHeaders winfo = CWavStreamReadHeaders.ReadWavStreamReadHeaders(r);
if (winfo.nAudioFormat != 1)
throw new WavCutException("Only audio format 1 is supported");
if (winfo.nSampleRate != 44100) throw new WavCutException("expect samplerate==44100");
if (winfo.nBitsPerSample != 16) throw new WavCutException("expect nBitsPerSample==16");
if (winfo.nChannels != 2) throw new WavCutException("expect nChannels==2");
uint nDataSize = 0;
while (true)
{
// Go through chunks. We are looking for "data" chunk
string sDatatag = new string(r.ReadChars(4));
nDataSize = r.ReadUInt32();
if (nDataSize > int.MaxValue)
throw new WavCutException("File too large.");
if (sDatatag == "data") // found the data section
{
break;
}
else // something else, continue looping
{
r.BaseStream.Seek(nDataSize,SeekOrigin.Current);
}
}
uint nLengthOfDataChunk = (uint)(nDataSize / (winfo.nChannels*(winfo.nBitsPerSample/8)));
int nSample = 0;
const int nReadsize = 1024;
bool bComplete = false;
// loop through wave until we reach the expected number of samples.
// we should not read until eof because there might be a later riff chunk.
while (!bComplete)
{
byte[] rawdata = r.ReadBytes((int)nReadsize);
if (rawdata == null || rawdata.Length == 0)
break;
for (int j = 0; j < rawdata.Length; j += 4)
{
if (bRaw)
{
objCallback.ReceiveRawSample(rawdata[j],rawdata[j + 1],rawdata[j + 2],rawdata[j + 3]);
}
else
{
short sha1 = rawdata[j + 0]; // intel byte order
short sha2 = (short)(((short)rawdata[j + 1]) << 8);
short sha = (short)(sha1 + sha2);
double sa = sha / ((double)short.MaxValue);
short shb1 = rawdata[j + 2]; // intel byte order
short shb2 = (short)(((short)rawdata[j + 3]) << 8);
short shb = (short)(sha1 + sha2);
double sb = shb / ((double)short.MaxValue);
if (sa != sb)
throw new WavCutException("different here");
objCallback.ReceiveProcessedSample(sa,sb);
}
nSample++;
if (nSample >= nLengthOfDataChunk)
{
bComplete = true;
break;
}
}
}
if (nSample != nLengthOfDataChunk)
Console.WriteLine("warning: eof reached earlier than expected. Expected "+nLengthOfDataChunk+" got "+nSample);
objCallback.OnFinished();
}
