public static Chunk ReadChunk(ref BinaryReader reader)
{
int data = reader.ReadInt32();
if (data == 0x46464952) // RIFF chunk
{
RIFFChunk riff = new RIFFChunk();
riff.chunk_id = data;
riff.file_size = reader.ReadInt32();
riff.riff_type = reader.ReadInt32();
return(riff);
}
else if (data == 0x20746D66) // fmt chunk
{
fmtChunk fmt = new fmtChunk();
fmt.chunk_id = data;
fmt.chunk_size = reader.ReadInt32();
fmt.format = reader.ReadInt16();
fmt.channels = reader.ReadInt16();
fmt.sample_rate = reader.ReadInt32();
fmt.bytes_per_sec = reader.ReadInt32();
fmt.block_align = reader.ReadInt16();
fmt.bits_per_sample = reader.ReadInt16();
return(fmt);
}
else if (data == 0x61746164) // data chunk
{
dataChunk data_chunk = new dataChunk();
data_chunk.chunk_id = data;
data_chunk.chunk_size = reader.ReadInt32();
return(data_chunk);
}
else
{
Chunk c = new Chunk();
c.chunk_id = data;
return(c);
}
}
unsafe private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{
try
{
RIFFChunk riff = null;
fmtChunk fmt = null;
dataChunk data_chunk = null;
Audio.loopback = false;
if (Audio.rb_mon_l == null || Audio.rb_mon_r == null)
{
Audio.rb_mon_l = new RingBufferFloat(Math.Max(buffer_size, 1024) * 1024);
Audio.rb_mon_r = new RingBufferFloat(Math.Max(buffer_size, 1024) * 1024);
}
else
{
Audio.rb_mon_l.Reset();
Audio.rb_mon_r.Reset();
}
btnPlay.BackColor = Color.WhiteSmoke;
btnPlay.Text = "Play";
float[] buf_left = new float[2048];
float[] buf_right = new float[2048];
byte[] data = new byte[16384];
byte[] temp = new byte[4];
int count = 0, buflen = 0;
string file = openFileDialog1.FileName;
Stream file_stream = File.Open(file, FileMode.Open, FileAccess.Read);
reader = new BinaryReader(file_stream);
string[] vals = file.Split('\\');
this.Text = " Recorder/Player " + vals[vals.Length - 1];
try
{
if (reader.PeekChar() != 'R')
{
reader.Close();
MessageBox.Show("File is not in the correct format.",
"Wrong File Format",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
while ((data_chunk == null ||
riff == null || fmt == null) &&
reader.PeekChar() != -1)
{
Chunk chunk = Chunk.ReadChunk(ref reader);
if (chunk.GetType() == typeof(RIFFChunk))
{
riff = (RIFFChunk)chunk;
}
else if (chunk.GetType() == typeof(fmtChunk))
{
fmt = (fmtChunk)chunk;
}
else if (chunk.GetType() == typeof(dataChunk))
{
data_chunk = (dataChunk)chunk;
}
}
if (reader.PeekChar() == -1)
{
reader.Close();
MessageBox.Show("File is not in the correct format.",
"Wrong File Format",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
if (riff.riff_type != 0x45564157)
{
reader.Close();
MessageBox.Show("File is not an RIFF Wave file.",
"Wrong file format",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
if ((fmt.sample_rate != Audio.SampleRate) || fmt.format == 1)
{
reader.Close();
MessageBox.Show("File has the wrong sample rate.",
"Wrong Sample Rate",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
if (fmt.channels != 2)
{
reader.Close();
MessageBox.Show("Wave File is not stereo.",
"Wrong Number of Channels",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
}
catch (Exception ex)
{
if (reader != null)
{
reader.Close();
}
MessageBox.Show(ex.Message + "\n\n" + ex.StackTrace.ToString(), "Fatal Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
fixed(float *input_l = &buf_left[0])
fixed(float *input_r = &buf_right[0])
{
while (Audio.rb_mon_l.WriteSpace() >= 2048)
{
count = reader.Read(data, 0, 16384);
buflen = Math.Min(count, 16384);
for (int i = 0; i < (buflen / 8); i++)
{
buf_left[i] = BitConverter.ToSingle(data, (i * 8));
buf_right[i] = BitConverter.ToSingle(data, (i * 8 + 4));
}
Audio.rb_mon_l.WritePtr(input_l, 2048);
Audio.rb_mon_r.WritePtr(input_r, 2048);
if (buflen < 16384)
{
reader.Close();
return;
}
}
reader.Close();
}
}
catch (Exception ex)
{
Debug.Write(ex.ToString());
if (reader != null)
{
reader.Close();
}
}
}
public static Chunk ReadChunk(ref BinaryReader reader)
{
int data = reader.ReadInt32();
if (data == 0x46464952) // RIFF chunk
{
RIFFChunk riff = new RIFFChunk();
riff.chunk_id = data;
riff.file_size = reader.ReadInt32();
riff.riff_type = reader.ReadInt32();
return riff;
}
else if (data == 0x20746D66) // fmt chunk
{
fmtChunk fmt = new fmtChunk();
fmt.chunk_id = data;
fmt.chunk_size = reader.ReadInt32();
fmt.format = reader.ReadInt16();
fmt.channels = reader.ReadInt16();
fmt.sample_rate = reader.ReadInt32();
fmt.bytes_per_sec = reader.ReadInt32();
fmt.block_align = reader.ReadInt16();
fmt.bits_per_sample = reader.ReadInt16();
return fmt;
}
else if (data == 0x61746164) // data chunk
{
dataChunk data_chunk = new dataChunk();
data_chunk.chunk_id = data;
data_chunk.chunk_size = reader.ReadInt32();
return data_chunk;
}
else
{
Chunk c = new Chunk();
c.chunk_id = data;
return c;
}
}
