public void Hide(Stream messageStream, Stream keyStream)
{
byte[] waveBuffer = new byte[bytesPerSample];
byte message, bit, waveByte;
int messageBuffer, keyByte;
while ((messageBuffer = messageStream.ReadByte()) >= 0)
{
//read one byte of the message
message = (byte)messageBuffer;
//for each bit in message
for (int bitIndex = 0; bitIndex < 8; bitIndex++)
{
//read a byte from the key
keyByte = GetKeyValue(keyStream);
//skip samples
for (int n = 0; n < keyByte - 1; n++)
{
sourceStream.Copy(waveBuffer, 0, waveBuffer.Length, destinationStream);
}
//read one sample from the wave stream
sourceStream.Read(waveBuffer, 0, waveBuffer.Length);
waveByte = waveBuffer[bytesPerSample - 1];
bit = (byte)(((message & (byte)(1 << bitIndex)) > 0) ? 1 : 0);
//change the last bit of the sample
if ((bit == 1) && ((waveByte % 2) == 0))
{
waveByte += 1;
}
else if ((bit == 0) && ((waveByte % 2) == 1))
{
waveByte -= 1;
}
waveBuffer[bytesPerSample - 1] = waveByte;
//write the result to destinationStream
destinationStream.Write(waveBuffer, 0, bytesPerSample);
}
}
waveBuffer = new byte[sourceStream.Length - sourceStream.Position];
sourceStream.Read(waveBuffer, 0, waveBuffer.Length);
destinationStream.Write(waveBuffer, 0, waveBuffer.Length);
}
/// <summary>
/// Converts Wav to MP3.
/// </summary>
/// <param name="inputFile">The input file.</param>
/// <param name="outputPath">The output path.</param>
/// <returns>
/// Path of changed file
/// </returns>
public static string ConvertWavToMp3(string inputFile, string outputPath)
{
var reader = new WaveStream(inputFile);
try
{
var config = new BE_CONFIG(reader.Format, (uint)(Math.Abs(BitRate - 0.0) < 0.1 ? DefaultBitRate : BitRate));
var writer = new Mp3Writer(new FileStream(outputPath, FileMode.Create), reader.Format, config);
try
{
var buffer = new byte[writer.OptimalBufferSize];
int read;
while ((read = reader.Read(buffer, 0, buffer.Length)) > 0)
{
writer.Write(buffer, 0, read);
}
}
finally
{
writer.Close();
}
}
finally
{
reader.Close();
}
return(outputPath);
}
internal byte[] ConvertWavToMp3(Stream stream)
{
var inStr = new WaveStream(stream);
try {
var convertedStream = new MemoryStream();
var writer = new Mp3Writer(convertedStream, inStr.Format);
try {
var buff = new byte[writer.OptimalBufferSize];
int read;
while ((read = inStr.Read(buff, 0, buff.Length)) > 0)
{
writer.Write(buff, 0, read);
}
convertedStream.Seek(0, SeekOrigin.Begin);
return(convertedStream.ToArray());
} catch (Exception e) {
LoggerWrapper.LogTo(LoggerName.Errors).ErrorException(
"AudioConverter.ConvertWavToMp3 inner вылетело исключение {0}", e);
} finally {
writer.Close();
}
} catch (Exception e) {
LoggerWrapper.LogTo(LoggerName.Errors).ErrorException(
"AudioConverter.ConvertWavToMp3 outer вылетело исключение {0}", e);
} finally {
inStr.Close();
}
return(null);
}
/// <summary>
/// Converts Wav to MP3.
/// </summary>
/// <param name="inputFile">The input file.</param>
/// <param name="outputPath">The output path.</param>
/// <returns>
/// Path of changed file
/// </returns>
public static string ConvertWavToMp3(string inputFile, string outputPath)
{
var reader = new WaveStream(inputFile);
try
{
var config = new BE_CONFIG(reader.Format, (uint)(Math.Abs(BitRate - 0.0) < 0.1 ? DefaultBitRate : BitRate));
var writer = new Mp3Writer(new FileStream(outputPath, FileMode.Create), reader.Format, config);
try
{
var buffer = new byte[writer.OptimalBufferSize];
int read;
while ((read = reader.Read(buffer, 0, buffer.Length)) > 0)
{
writer.Write(buffer, 0, read);
}
}
finally
{
writer.Close();
}
}
finally
{
reader.Close();
}
return outputPath;
}
