private WaveFormat ReadWaveFormat(SscfWaveHeader waveHeader)
{
switch (waveHeader.Format)
{
case SscfWaveFormat.Empty:
if (waveHeader.DataLength != 0)
{
throw new InvalidDataException();
}
return(null);
case SscfWaveFormat.Pcm:
return(CreatePcmWaveFormat(waveHeader));
case SscfWaveFormat.Vorbis:
//voice = new VorbisWave() {Parent = this, WaveHeader = waveHeader};
throw new NotSupportedException("Unsupported Wave Format: " + waveHeader.Format);
case SscfWaveFormat.MsAdPcm:
return(ReadMicrosoftAdPcmWaveFormat(waveHeader));
case SscfWaveFormat.Atrac3:
case SscfWaveFormat.Atrac3Too:
case SscfWaveFormat.Xma:
throw new NotSupportedException("Unsupported Wave Format: " + waveHeader.Format);
default:
throw new NotImplementedException("Unknown Wave Format: 0x" + ((int)waveHeader.Format).ToString("X"));
}
}
private WaveFormat CreatePcmWaveFormat(SscfWaveHeader waveHeader)
{
const int bitsPerSample = 16;
short channels = (short)waveHeader.NumChannels;
short blockAlign = (short)(channels * 2);
int sampleRate = waveHeader.SamplingRate;
int averageBytesPerSecond = sampleRate * blockAlign;
return(WaveFormat.CreateCustomFormat(
WaveFormatEncoding.Pcm,
sampleRate,
channels,
averageBytesPerSecond,
blockAlign,
bitsPerSample));
}
private WaveFormat CreatePcmWaveFormat(SscfWaveHeader waveHeader)
{
const int bitsPerSample = 16;
short channels = (short)waveHeader.NumChannels;
short blockAlign = (short)(channels * 2);
int sampleRate = waveHeader.SamplingRate;
int averageBytesPerSecond = sampleRate * blockAlign;
return WaveFormat.CreateCustomFormat(
WaveFormatEncoding.Pcm,
sampleRate,
channels,
averageBytesPerSecond,
blockAlign,
bitsPerSample);
}
public WaveStream[] Read()
{
SectionHeader sectionHeader = _input.ReadContent <SectionHeader>();
SscfHeader sscfHeader = _input.ReadContent <SscfHeader>();
BinaryReader br = new BinaryReader(_input);
_input.SetPosition(sscfHeader.WavesOffset);
int[] offsets = new int[sscfHeader.NumWaves];
for (int i = 0; i < offsets.Length; i++)
{
offsets[i] = br.ReadInt32();
}
WaveStream[] result = new WaveStream[sscfHeader.NumWaves];
for (int i = 0; i < offsets.Length; i++)
{
_input.SetPosition(offsets[i]);
SscfWaveHeader waveHeader = _input.ReadContent <SscfWaveHeader>();
if (waveHeader.Format == SscfWaveFormat.Vorbis)
{
_input.SetPosition(waveHeader.DataOffset);
byte[] vorbisData = _input.EnsureRead(waveHeader.DataLength);
MemoryStream vorbisMs = new MemoryStream(vorbisData, 0, vorbisData.Length, false);
result[i] = new VorbisWaveReader(vorbisMs);
continue;
}
WaveFormat format = ReadWaveFormat(waveHeader);
if (format == null)
{
continue;
}
_input.SetPosition(waveHeader.DataOffset);
byte[] data = _input.EnsureRead(waveHeader.DataLength);
MemoryStream ms = new MemoryStream(data, 0, data.Length, false);
result[i] = new RawSourceWaveStream(ms, format);
}
return(result);
}
private WaveFormat ReadMicrosoftAdPcmWaveFormat(SscfWaveHeader waveHeader)
{
BinaryReader br = new BinaryReader(_input);
return(WaveFormat.FromFormatChunk(br, waveHeader.FormatHeaderLength));
}
private WaveFormat ReadWaveFormat(SscfWaveHeader waveHeader)
{
switch (waveHeader.Format)
{
case SscfWaveFormat.Empty:
if (waveHeader.DataLength != 0)
throw new InvalidDataException();
return null;
case SscfWaveFormat.Pcm:
return CreatePcmWaveFormat(waveHeader);
case SscfWaveFormat.Vorbis:
//voice = new VorbisWave() {Parent = this, WaveHeader = waveHeader};
throw new NotSupportedException("Unsupported Wave Format: " + waveHeader.Format);
case SscfWaveFormat.MsAdPcm:
return ReadMicrosoftAdPcmWaveFormat(waveHeader);
case SscfWaveFormat.Atrac3:
case SscfWaveFormat.Atrac3Too:
case SscfWaveFormat.Xma:
throw new NotSupportedException("Unsupported Wave Format: " + waveHeader.Format);
default:
throw new NotImplementedException("Unknown Wave Format: 0x" + ((int)waveHeader.Format).ToString("X"));
}
}
private WaveFormat ReadMicrosoftAdPcmWaveFormat(SscfWaveHeader waveHeader)
{
BinaryReader br = new BinaryReader(_input);
return WaveFormat.FromFormatChunk(br, waveHeader.FormatHeaderLength);
}