[janderwald] 39952: - Implement wave pcm bitrate conversion. Atm only 8-16 bit has been tested - The tricky part is just to get result value into the right byte order (endianess) - Thanks to Christoph and everyone else :)

Author: janderwald
Date: Wed Mar 11 17:42:42 2009
New Revision: 39952

URL: http://svn.reactos.org/svn/reactos?rev=39952&view=rev
Log:
- Implement wave pcm bitrate conversion. Atm only 8-16 bit has been tested
- The tricky part is just to get result value into the right byte order (endianess)
- Thanks to Christoph and everyone else :)

Modified:
    trunk/reactos/drivers/wdm/audio/filters/kmixer/pin.c

Modified: trunk/reactos/drivers/wdm/audio/filters/kmixer/pin.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/wdm/audio/filters/k...
==============================================================================
--- trunk/reactos/drivers/wdm/audio/filters/kmixer/pin.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/wdm/audio/filters/kmixer/pin.c [iso-8859-1] Wed Mar 11 17:42:42 2009
@@ -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 @@

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 @@
           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 @@

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);