internal static extern int mmioDescend(IntPtr hMIO,
[MarshalAs(UnmanagedType.LPStruct)] NativeMethods.MMCKINFO lpck,
[MarshalAs(UnmanagedType.LPStruct)] NativeMethods.MMCKINFO lcpkParent,
int flags);
internal static extern int mmioAscend(IntPtr hMIO, NativeMethods.MMCKINFO lpck, int flags);
private unsafe void ValidateSoundFile(string fileName)
{
NativeMethods.MMCKINFO ckRIFF = new NativeMethods.MMCKINFO();
NativeMethods.MMCKINFO ck = new NativeMethods.MMCKINFO();
NativeMethods.WAVEFORMATEX waveFormat = null;
int dw;
IntPtr hMIO = UnsafeNativeMethods.mmioOpen(fileName, IntPtr.Zero, NativeMethods.MMIO_READ | NativeMethods.MMIO_ALLOCBUF);
if (hMIO == IntPtr.Zero)
{
throw new FileNotFoundException(SR.GetString(SR.SoundAPIFileDoesNotExist), this.soundLocation);
}
try {
ckRIFF.fccType = mmioFOURCC('W', 'A', 'V', 'E');
if (UnsafeNativeMethods.mmioDescend(hMIO, ckRIFF, null, NativeMethods.MMIO_FINDRIFF) != 0)
{
throw new InvalidOperationException(SR.GetString(SR.SoundAPIInvalidWaveFile, this.soundLocation));
}
while (UnsafeNativeMethods.mmioDescend(hMIO, ck, ckRIFF, 0) == 0)
{
if (ck.dwDataOffset + ck.cksize > ckRIFF.dwDataOffset + ckRIFF.cksize)
{
throw new InvalidOperationException(SR.GetString(SR.SoundAPIInvalidWaveHeader));
}
if (ck.ckID == mmioFOURCC('f', 'm', 't', ' '))
{
if (waveFormat == null)
{
dw = ck.cksize;
if (dw < Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX)))
{
dw = Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX));
}
waveFormat = new NativeMethods.WAVEFORMATEX();
byte[] data = new byte[dw];
if (UnsafeNativeMethods.mmioRead(hMIO, data, dw) != dw)
throw new InvalidOperationException(SR.GetString(SR.SoundAPIReadError, this.soundLocation));
fixed(byte *pdata = data)
{
Marshal.PtrToStructure((IntPtr)pdata, waveFormat);
}
}
else
{
//
// multiple formats?
//
}
}
UnsafeNativeMethods.mmioAscend(hMIO, ck, 0);
}
if (waveFormat == null)
{
throw new InvalidOperationException(SR.GetString(SR.SoundAPIInvalidWaveHeader));
}
if (waveFormat.wFormatTag != NativeMethods.WAVE_FORMAT_PCM &&
waveFormat.wFormatTag != NativeMethods.WAVE_FORMAT_ADPCM &&
waveFormat.wFormatTag != NativeMethods.WAVE_FORMAT_IEEE_FLOAT)
{
throw new InvalidOperationException(SR.GetString(SR.SoundAPIFormatNotSupported));
}
} finally {
if (hMIO != IntPtr.Zero)
{
UnsafeNativeMethods.mmioClose(hMIO, 0);
}
}
}
private unsafe void ValidateSoundFile(string fileName)
{
NativeMethods.MMCKINFO lpck = new NativeMethods.MMCKINFO();
NativeMethods.MMCKINFO mmckinfo2 = new NativeMethods.MMCKINFO();
NativeMethods.WAVEFORMATEX structure = null;
IntPtr hMIO = UnsafeNativeMethods.mmioOpen(fileName, IntPtr.Zero, 0x10000);
if (hMIO == IntPtr.Zero)
{
throw new FileNotFoundException(SR.GetString("SoundAPIFileDoesNotExist"), this.soundLocation);
}
try
{
lpck.fccType = mmioFOURCC('W', 'A', 'V', 'E');
if (UnsafeNativeMethods.mmioDescend(hMIO, lpck, null, 0x20) == 0)
{
goto Label_0179;
}
throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveFile", new object[] { this.soundLocation }));
Label_008B:
if ((mmckinfo2.dwDataOffset + mmckinfo2.cksize) > (lpck.dwDataOffset + lpck.cksize))
{
throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
if ((mmckinfo2.ckID == mmioFOURCC('f', 'm', 't', ' ')) && (structure == null))
{
int cksize = mmckinfo2.cksize;
if (cksize < Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX)))
{
cksize = Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX));
}
structure = new NativeMethods.WAVEFORMATEX();
byte[] wf = new byte[cksize];
if (UnsafeNativeMethods.mmioRead(hMIO, wf, cksize) != cksize)
{
throw new InvalidOperationException(SR.GetString("SoundAPIReadError", new object[] { this.soundLocation }));
}
try
{
fixed(byte *numRef = wf)
{
Marshal.PtrToStructure((IntPtr)numRef, structure);
}
}
finally
{
numRef = null;
}
}
UnsafeNativeMethods.mmioAscend(hMIO, mmckinfo2, 0);
Label_0179:
if (UnsafeNativeMethods.mmioDescend(hMIO, mmckinfo2, lpck, 0) == 0)
{
goto Label_008B;
}
if (structure == null)
{
throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
if (((structure.wFormatTag != 1) && (structure.wFormatTag != 2)) && (structure.wFormatTag != 3))
{
throw new InvalidOperationException(SR.GetString("SoundAPIFormatNotSupported"));
}
}
finally
{
if (hMIO != IntPtr.Zero)
{
UnsafeNativeMethods.mmioClose(hMIO, 0);
}
}
}
private unsafe void ValidateSoundFile(string fileName) {
NativeMethods.MMCKINFO ckRIFF = new NativeMethods.MMCKINFO();
NativeMethods.MMCKINFO ck = new NativeMethods.MMCKINFO();
NativeMethods.WAVEFORMATEX waveFormat = null;
int dw;
IntPtr hMIO = UnsafeNativeMethods.mmioOpen(fileName, IntPtr.Zero, NativeMethods.MMIO_READ | NativeMethods.MMIO_ALLOCBUF);
if (hMIO == IntPtr.Zero)
throw new FileNotFoundException(SR.GetString(SR.SoundAPIFileDoesNotExist), this.soundLocation);
try {
ckRIFF.fccType = mmioFOURCC('W', 'A','V','E');
if (UnsafeNativeMethods.mmioDescend(hMIO, ckRIFF, null, NativeMethods.MMIO_FINDRIFF) != 0)
throw new InvalidOperationException(SR.GetString(SR.SoundAPIInvalidWaveFile, this.soundLocation));
while (UnsafeNativeMethods.mmioDescend(hMIO, ck, ckRIFF, 0) == 0) {
if (ck.dwDataOffset + ck.cksize > ckRIFF.dwDataOffset + ckRIFF.cksize)
throw new InvalidOperationException(SR.GetString(SR.SoundAPIInvalidWaveHeader));
if (ck.ckID == mmioFOURCC('f','m','t',' ')) {
if (waveFormat == null) {
dw = ck.cksize;
if (dw < Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX)))
dw = Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX));
waveFormat = new NativeMethods.WAVEFORMATEX();
byte[] data = new byte[dw];
if (UnsafeNativeMethods.mmioRead(hMIO, data, dw) != dw)
throw new InvalidOperationException(SR.GetString(SR.SoundAPIReadError, this.soundLocation));
fixed(byte* pdata = data) {
Marshal.PtrToStructure((IntPtr) pdata, waveFormat);
}
} else {
//
// multiple formats?
//
}
}
UnsafeNativeMethods.mmioAscend(hMIO, ck, 0);
}
if (waveFormat == null)
throw new InvalidOperationException(SR.GetString(SR.SoundAPIInvalidWaveHeader));
if (waveFormat.wFormatTag != NativeMethods.WAVE_FORMAT_PCM &&
waveFormat.wFormatTag != NativeMethods.WAVE_FORMAT_ADPCM &&
waveFormat.wFormatTag != NativeMethods.WAVE_FORMAT_IEEE_FLOAT)
throw new InvalidOperationException(SR.GetString(SR.SoundAPIFormatNotSupported));
} finally {
if (hMIO != IntPtr.Zero)
UnsafeNativeMethods.mmioClose(hMIO, 0);
}
}
private unsafe void ValidateSoundFile(string fileName)
{
NativeMethods.MMCKINFO lpck = new NativeMethods.MMCKINFO();
NativeMethods.MMCKINFO mmckinfo2 = new NativeMethods.MMCKINFO();
NativeMethods.WAVEFORMATEX structure = null;
IntPtr hMIO = UnsafeNativeMethods.mmioOpen(fileName, IntPtr.Zero, 0x10000);
if (hMIO == IntPtr.Zero)
{
throw new FileNotFoundException(SR.GetString("SoundAPIFileDoesNotExist"), this.soundLocation);
}
try
{
lpck.fccType = mmioFOURCC('W', 'A', 'V', 'E');
if (UnsafeNativeMethods.mmioDescend(hMIO, lpck, null, 0x20) == 0)
{
goto Label_0179;
}
throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveFile", new object[] { this.soundLocation }));
Label_008B:
if ((mmckinfo2.dwDataOffset + mmckinfo2.cksize) > (lpck.dwDataOffset + lpck.cksize))
{
throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
if ((mmckinfo2.ckID == mmioFOURCC('f', 'm', 't', ' ')) && (structure == null))
{
int cksize = mmckinfo2.cksize;
if (cksize < Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX)))
{
cksize = Marshal.SizeOf(typeof(NativeMethods.WAVEFORMATEX));
}
structure = new NativeMethods.WAVEFORMATEX();
byte[] wf = new byte[cksize];
if (UnsafeNativeMethods.mmioRead(hMIO, wf, cksize) != cksize)
{
throw new InvalidOperationException(SR.GetString("SoundAPIReadError", new object[] { this.soundLocation }));
}
try
{
fixed (byte* numRef = wf)
{
Marshal.PtrToStructure((IntPtr) numRef, structure);
}
}
finally
{
numRef = null;
}
}
UnsafeNativeMethods.mmioAscend(hMIO, mmckinfo2, 0);
Label_0179:
if (UnsafeNativeMethods.mmioDescend(hMIO, mmckinfo2, lpck, 0) == 0)
{
goto Label_008B;
}
if (structure == null)
{
throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
if (((structure.wFormatTag != 1) && (structure.wFormatTag != 2)) && (structure.wFormatTag != 3))
{
throw new InvalidOperationException(SR.GetString("SoundAPIFormatNotSupported"));
}
}
finally
{
if (hMIO != IntPtr.Zero)
{
UnsafeNativeMethods.mmioClose(hMIO, 0);
}
}
}
