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WAVWriter & LossyWAVSharp now support writing to stdout

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chudov
2008-11-22 16:40:48 +00:00
parent b5008007cf
commit 0cb204d2bc
4 changed files with 78 additions and 51 deletions
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104
AudioCodecsDotNet/AudioCodecsDotNet.cs
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@@ -505,15 +505,19 @@ namespace AudioCodecsDotNet
public class WAVWriter : IAudioDest
{
FileStream _IO;
Stream _IO;
BinaryWriter _bw;
int _bitsPerSample, _channelCount, _sampleRate, _blockAlign;
long _sampleLen;
string _path;
private byte[] _sampleBuffer;
long hdrLen = 44;
long hdrLen = 0;
bool _headersWritten = false;
long _finalSampleCount;
List<byte[]> _chunks = null;
List<uint> _chunkFCCs = null;
public WAVWriter(string path, int bitsPerSample, int channelCount, int sampleRate)
public WAVWriter(string path, int bitsPerSample, int channelCount, int sampleRate, Stream IO)
{
_path = path;
_bitsPerSample = bitsPerSample;
@@ -521,10 +525,8 @@ namespace AudioCodecsDotNet
_sampleRate = sampleRate;
_blockAlign = _channelCount * ((_bitsPerSample + 7) / 8);
_IO = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read);
_IO = IO != null ? IO : new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read);
_bw = new BinaryWriter(_IO);
WriteHeaders();
}
public bool SetTags(NameValueCollection tags)
@@ -536,16 +538,14 @@ namespace AudioCodecsDotNet
{
if (_sampleLen > 0)
throw new Exception("data already written, no chunks allowed");
const uint fccData = 0x61746164;
_bw.Seek((int)hdrLen - 8, SeekOrigin.Begin);
_bw.Write(fcc);
_bw.Write((uint)data.Length);
_bw.Write(data);
if ((data.Length & 1) != 0)
_bw.Write((byte) 0);
_bw.Write(fccData);
_bw.Write((uint)0);
hdrLen += data.Length + (data.Length & 1) + 8;
if (_chunks == null)
{
_chunks = new List<byte[]>();
_chunkFCCs = new List<uint>();
}
_chunkFCCs.Add(fcc);
_chunks.Add(data);
hdrLen += 8 + data.Length + (data.Length & 1);
}
private void WriteHeaders()
@@ -555,15 +555,20 @@ namespace AudioCodecsDotNet
const uint fccFormat = 0x20746D66;
const uint fccData = 0x61746164;
_bw.Write(fccRIFF);
_bw.Write((uint)0);
_bw.Write(fccWAVE);
bool wavex = _bitsPerSample != 16 && _bitsPerSample != 24;
hdrLen += 36 + (wavex ? 24 : 0) + 8;
uint dataLen = (uint) (_finalSampleCount * _blockAlign);
uint dataLenPadded = dataLen + (dataLen & 1);
_bw.Write(fccRIFF);
_bw.Write((uint)(dataLenPadded + hdrLen - 8));
_bw.Write(fccWAVE);
_bw.Write(fccFormat);
if (_bitsPerSample != 16 && _bitsPerSample != 24)
if (wavex)
{
_bw.Write((uint)40);
//_bw.Write((uint)16);
_bw.Write((ushort)0xfffe); // WAVEX follows
}
else
@@ -576,9 +581,7 @@ namespace AudioCodecsDotNet
_bw.Write((uint)(_sampleRate * _blockAlign));
_bw.Write((ushort)_blockAlign);
_bw.Write((ushort)((_bitsPerSample+7)/8*8));
hdrLen = 36;
if (_bitsPerSample != 16 && _bitsPerSample != 24)
if (wavex)
{
_bw.Write((ushort)22); // length of WAVEX structure
_bw.Write((ushort)_bitsPerSample);
@@ -595,40 +598,49 @@ namespace AudioCodecsDotNet
_bw.Write((byte)0x38);
_bw.Write((byte)0x9b);
_bw.Write((byte)0x71);
hdrLen += 24;
}
if (_chunks != null)
for (int i = 0; i < _chunks.Count; i++)
{
_bw.Write(_chunkFCCs[i]);
_bw.Write((uint)_chunks[i].Length);
_bw.Write(_chunks[i]);
if ((_chunks[i].Length & 1) != 0)
_bw.Write((byte)0);
}
_bw.Write(fccData);
_bw.Write((uint)0);
hdrLen += 8;
_bw.Write(dataLen);
_headersWritten = true;
}
public void Close()
{
const long maxFileSize = 0x7FFFFFFEL;
long dataLen, dataLenPadded;
if (_finalSampleCount == 0)
{
const long maxFileSize = 0x7FFFFFFEL;
long dataLen = _sampleLen * _blockAlign;
if ((dataLen & 1) == 1)
_bw.Write((byte)0);
if (dataLen + hdrLen > maxFileSize)
dataLen = ((maxFileSize - hdrLen) / _blockAlign) * _blockAlign;
long dataLenPadded = dataLen + (dataLen & 1);
dataLen = _sampleLen * _blockAlign;
_bw.Seek(4, SeekOrigin.Begin);
_bw.Write((uint)(dataLenPadded + hdrLen - 8));
if ((dataLen & 1) == 1)
_bw.Write((byte)0);
if (dataLen + hdrLen > maxFileSize)
dataLen = ((maxFileSize - hdrLen) / _blockAlign) * _blockAlign;
dataLenPadded = dataLen + (dataLen & 1);
_bw.Seek(4, SeekOrigin.Begin);
_bw.Write((uint)(dataLenPadded + hdrLen - 8));
_bw.Seek((int)hdrLen-4, SeekOrigin.Begin);
_bw.Write((uint)dataLen);
_bw.Seek((int)hdrLen - 4, SeekOrigin.Begin);
_bw.Write((uint)dataLen);
}
_bw.Close();
_bw = null;
_IO = null;
if (_finalSampleCount != 0 && _sampleLen != _finalSampleCount)
throw new Exception("Samples written differs from the expected sample count.");
}
public void Delete()
@@ -649,7 +661,7 @@ namespace AudioCodecsDotNet
public long FinalSampleCount
{
set { }
set { _finalSampleCount = value; }
}
public long BlockSize
@@ -666,6 +678,8 @@ namespace AudioCodecsDotNet
{
if (sampleCount == 0)
return;
if (!_headersWritten)
WriteHeaders();
if (_sampleBuffer == null || _sampleBuffer.Length < sampleCount * _blockAlign)
_sampleBuffer = new byte[sampleCount * _blockAlign];
AudioSamples.FLACSamplesToBytes(buff, 0, _sampleBuffer, 0,