static public RiffForm Load(string path)
{
RiffForm riff = default(RiffForm);
using (Stream fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) riff = Load(fs);
return(riff);
}
public static RiffForm Load(Stream fs)
{
RiffForm riff = new RiffForm();
ChunkCollection cks = riff.Cks = new ChunkCollection();
using (BinaryReader bread = new BinaryReader(fs))
{
cks.ckMain = new CHUNK(bread);
cks.SubChunks = new Dictionary<long,SUBCHUNK>();
if (cks.ckMain.ckID=="RIFF")
{
while (fs.Position < fs.Length)
{
SUBCHUNK CX = new SUBCHUNK(bread);
long tpos = fs.Position - Marshal.SizeOf(CX);
cks.SubChunks.Add(tpos,CX);
if (CX.ckID != null)
switch (CX.ckID)
{
case "fmt ":
cks.ckFmt = IOHelper.ReadChunk<WaveFormat>(tpos,fs,bread);
break;
case "fact":
case "INFO":
cks.ckFact = IOHelper.ReadChunk<ChunkFact>(tpos,fs,bread);
break;
case "inst":
cks.ckInst = IOHelper.ReadChunk<_inst>(tpos,fs,bread);
break;
case "smpl":
cks.ckSmpl = IOHelper.ReadChunk<_smp>(tpos,fs,bread);
List<_smpLoop> bob = new List<_smpLoop>();
for (int i=0; i<cks.ckSmpl.smpSampleLoops; i++) bob.Add(new _smpLoop(bread));
// clear the list.
cks.ckSmpLoop = bob.ToArray();
bob.Clear();
bob = null;
break;
case "data":
case "JUNK":
case "PAD ":
System.Diagnostics.Debug.Print("Skipping Chunk: '{0}'\n",CX.ckID);
break;
default:
System.Diagnostics.Debug.Print("Unknown Chunk: '{0}'\n",CX.ckID);
// Console.Beep();
break;
}
fs.Seek(tpos+CX.ckLength+Marshal.SizeOf(CX),SeekOrigin.Begin);
}
}
bread.Close();
}
fs.Close();
riff.Cks = cks;
return riff;
}
/// <summary>
/// Returns the Index where reading begins for a wave-sample (<see cref="RiffForm" />) in memory.
/// </summary>
/// <param name="riff">Our ram/riff-wave.</param>
/// <returns>Index where reading begins</returns>
public static int FindSampleStart(RiffForm riff)
{
int start = -1;
// if (!MustReadFromDisk)
{
foreach (KeyValuePair<long,SUBCHUNK> ck in riff.Cks.SubChunks)
{
if (ck.Value.ckID=="data")
start = Convert.ToInt32(ck.Key)+8;
}
}
return start;
}
public override void Dispose()
{
DisposeStream();
if (RawWaveData!=null)
{
Array.Clear(RawWaveData, 0, RawWaveData.Length);
RawWaveData = null;
}
this.wformat = null;
this.WaveForm = null;
}
void InitializeMemory(string path)
{
this.WaveForm = RiffForm.Load(path);
this.wformat = RiffUtil.ToNAudio(this.WaveForm.Cks.ckFmt);
sampleData_ChunkLength = this.WaveForm["data"].ckLength;
SampleData_SampleCount = SampleData_ChunkLength / WaveFormat.Channels;
sampleData_DataStart = RiffUtil.FindSampleStart(this.WaveForm);
RawWaveData = new byte[sampleData_ChunkLength];
using (waveFileInputStream = new FileStream(
this.FilePath,FileMode.Open,FileAccess.Read,FileShare.ReadWrite))
{
waveFileInputStream.Seek(sampleData_DataStart, SeekOrigin.Begin);
waveFileInputStream.Read(RawWaveData,/*sampleData_DataStart*/0,SampleData_ChunkLength);
}
}
static public RiffForm Load(Stream fs)
{
RiffForm riff = new RiffForm();
ChunkCollection cks = riff.Cks = new ChunkCollection();
using (BinaryReader bread = new BinaryReader(fs))
{
cks.ckMain = new CHUNK(bread);
cks.SubChunks = new Dictionary <long, SUBCHUNK>();
if (cks.ckMain.ckID == "RIFF")
{
while (fs.Position < fs.Length)
{
SUBCHUNK CX = new SUBCHUNK(bread);
long tpos = fs.Position - Marshal.SizeOf(CX);
cks.SubChunks.Add(tpos, CX);
if (CX.ckID != null)
{
switch (CX.ckID)
{
case "fmt ":
cks.ckFmt = IOHelper.ReadChunk <WaveFormat>(tpos, fs, bread);
break;
case "fact":
case "INFO":
cks.ckFact = IOHelper.ReadChunk <ChunkFact>(tpos, fs, bread);
break;
case "inst":
cks.ckInst = IOHelper.ReadChunk <_inst>(tpos, fs, bread);
break;
case "smpl":
cks.ckSmpl = IOHelper.ReadChunk <_smp>(tpos, fs, bread);
List <_smpLoop> bob = new List <_smpLoop>();
for (int i = 0; i < cks.ckSmpl.smpSampleLoops; i++)
{
bob.Add(new _smpLoop(bread));
}
// clear the list.
cks.ckSmpLoop = bob.ToArray();
bob.Clear();
bob = null;
break;
case "data":
case "JUNK":
case "PAD ":
System.Diagnostics.Debug.Print("Skipping Chunk: '{0}'\n", CX.ckID);
break;
default:
System.Diagnostics.Debug.Print("Unknown Chunk: '{0}'\n", CX.ckID);
// Console.Beep();
break;
}
}
fs.Seek(tpos + CX.ckLength + Marshal.SizeOf(CX), SeekOrigin.Begin);
}
}
bread.Close();
}
fs.Close();
riff.Cks = cks;
return(riff);
}
