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- Implement wave pcm bitrate conversion. Atm only 8-16 bit has been tested

Browse source 
- The tricky part is just to get result value into the right byte order (endianess)
- Thanks to Christoph and everyone else :)

svn path=/trunk/; revision=39952
This commit is contained in:
Johannes Anderwald 2009-03-11 14:42:42 +00:00
parent 2a3a7faf98
commit e3ba7d5ef2
1 changed files with 51 additions and 12 deletions
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63
reactos/drivers/wdm/audio/filters/kmixer/pin.c
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@ -10,6 +10,27 @@
const GUID KSPROPSETID_Connection = {0x1D58C920L, 0xAC9B, 0x11CF, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
#ifdef _X86_
#define htons(w) \
((((w) & 0xFF00) >> 8) | \
(((w) & 0x00FF) << 8))
#define htonl(n) (((((unsigned long)(n) & 0xFF)) << 24) | \
((((unsigned long)(n) & 0xFF00)) << 8) | \
((((unsigned long)(n) & 0xFF0000)) >> 8) | \
((((unsigned long)(n) & 0xFF000000)) >> 24))
#define ntohs(n) (((((unsigned short)(n) & 0xFF)) << 8) | (((unsigned short)(n) & 0xFF00) >> 8))
#define ntohl(n) (((((unsigned long)(n) & 0xFF)) << 24) | \
((((unsigned long)(n) & 0xFF00)) << 8) | \
((((unsigned long)(n) & 0xFF0000)) >> 8) | \
((((unsigned long)(n) & 0xFF000000)) >> 24))
#endif
NTSTATUS
PerformQualityConversion(
PUCHAR Buffer,
@ -24,12 +45,8 @@ PerformQualityConversion(
ASSERT(OldWidth != NewWidth);
/* FIXME
* This code does not work at all
*/
Samples = BufferLength / (OldWidth / 8);
DPRINT1("Samples %u BufferLength %u\n", Samples, BufferLength);
//DPRINT("Samples %u BufferLength %u\n", Samples, BufferLength);
if (OldWidth == 8 && NewWidth == 16)
{
@ -41,34 +58,41 @@ PerformQualityConversion(
for(Index = 0; Index < Samples; Index++)
{
Sample = Buffer[Index];
BufferOut[Index] = Sample * 256;
Sample *= 2;
BufferOut[Index] = htons(Sample);
}
*Result = BufferOut;
*ResultLength = Samples * sizeof(USHORT);
DPRINT1("done\n");
}
else if (OldWidth == 8 && NewWidth == 32)
{
ULONG Sample;
PULONG BufferOut = ExAllocatePool(NonPagedPool, Samples * sizeof(ULONG));
if (!BufferOut)
return STATUS_INSUFFICIENT_RESOURCES;
for(Index = 0; Index < Samples; Index++)
{
BufferOut[Index] = Buffer[Index] * 16777216;
Sample = Buffer[Index];
Sample *= 16777216;
BufferOut[Index] = htonl(Sample);
}
*Result = BufferOut;
*ResultLength = Samples * sizeof(ULONG);
}
else if (OldWidth == 16 && NewWidth == 32)
{
ULONG Sample;
PUSHORT BufferIn = (PUSHORT)Buffer;
PULONG BufferOut = ExAllocatePool(NonPagedPool, Samples * sizeof(ULONG));
if (!BufferOut)
return STATUS_INSUFFICIENT_RESOURCES;
for(Index = 0; Index < Samples; Index++)
{
BufferOut[Index] = Buffer[Index] * 65536;
Sample = BufferIn[Index];
Sample *= 65536;
BufferOut[Index] = htonl(Sample);
}
*Result = BufferOut;
*ResultLength = Samples * sizeof(ULONG);
@ -76,39 +100,54 @@ PerformQualityConversion(
else if (OldWidth == 16 && NewWidth == 8)
{
USHORT Sample;
PUSHORT BufferIn = (PUSHORT)Buffer;
PUCHAR BufferOut = ExAllocatePool(NonPagedPool, Samples * sizeof(UCHAR));
if (!BufferOut)
return STATUS_INSUFFICIENT_RESOURCES;
for(Index = 0; Index < Samples; Index++)
{
BufferOut[Index] = (Buffer[Index] / 256) & 0xFF;
Sample = BufferIn[Index];
Sample = ntohs(Sample);
Sample /= 256;
BufferOut[Index] = (Sample / 0xFF);
}
*Result = BufferOut;
*ResultLength = Samples * sizeof(UCHAR);
}
else if (OldWidth == 32 && NewWidth == 8)
{
ULONG Sample;
PULONG BufferIn = (PULONG)Buffer;
PUCHAR BufferOut = ExAllocatePool(NonPagedPool, Samples * sizeof(UCHAR));
if (!BufferOut)
return STATUS_INSUFFICIENT_RESOURCES;
for(Index = 0; Index < Samples; Index++)
{
BufferOut[Index] = (Buffer[Index] / 16777216) & 0xFF;
Sample = BufferIn[Index];
Sample = ntohl(Sample);
Sample /= 16777216;
BufferOut[Index] = Sample & 0xFF;
}
*Result = BufferOut;
*ResultLength = Samples * sizeof(UCHAR);
}
else if (OldWidth == 32 && NewWidth == 16)
{
USHORT Sample;
PULONG BufferIn = (PULONG)Buffer;
PUSHORT BufferOut = ExAllocatePool(NonPagedPool, Samples * sizeof(USHORT));
if (!BufferOut)
return STATUS_INSUFFICIENT_RESOURCES;
for(Index = 0; Index < Samples; Index++)
{
BufferOut[Index] = (Buffer[Index] / 65536) & 0xFFFF;
Sample = BufferIn[Index];
Sample = ntohl(Sample);
Sample /= 65536;
BufferOut[Index] = Sample & 0xFFFF;
}
*Result = BufferOut;
*ResultLength = Samples * sizeof(USHORT);