Use lower case

1 files changed, 137 insertions, 0 deletions

diff --git a/avstream/avscamera/sys/YUY2Synthesizer.cpp b/avstream/avscamera/sys/YUY2Synthesizer.cpp
new file mode 100644
index 00000000..14a76262
--- /dev/null
+++ b/avstream/avscamera/sys/YUY2Synthesizer.cpp
@@ -0,0 +1,137 @@
+/**************************************************************************
+
+    A/V Stream Camera Sample
+
+    Copyright (c) 2014, Microsoft Corporation.
+
+    File:
+
+        YUVSynthesizer.cpp
+
+    Abstract:
+
+        This file contains the implementation of CYUY2Synthesizer.
+
+        CYUY2Synthesizer is derived from CYUVSynthesizer.  An image 
+        synthesizer for YUY2 format.  It uses the YUV color space and defines 
+        a Commit() function.
+        
+        YUY2 is a 4:2:2 format that uses a single plane that decimates chroma 
+        samples on the x axis with an effective bit rate of 16 bits per pixel.
+        A plane is an array of rows.  Rows consist of pairs of pixels in the 
+        sequence: Y0|U|Y1|V.
+
+        The synthesizer stores the YUV information in 32 bit format internally
+        for speed and accuracy.  The Commit function does the format conversion.
+
+    History:
+
+        created 4/14/2014
+
+**************************************************************************/
+
+#include "Common.h"
+
+/**************************************************************************
+
+    PAGED CODE
+
+**************************************************************************/
+
+#ifdef ALLOC_PRAGMA
+#pragma code_seg("PAGE")
+#endif // ALLOC_PRAGMA
+
+// suppressed due to Esp:773
+#pragma warning (push)
+#pragma warning( disable:26015 )    // Suppress OACR error.  Seems nonsensical.  TODO: Must revisit.
+#pragma warning( disable:26019 )
+_Success_(return > 0)
+ULONG
+CYUY2Synthesizer::
+Commit(
+    _Out_writes_bytes_(Size)
+    PUCHAR  Buffer,
+    _In_    ULONG   Size,
+    _In_    ULONG   Stride
+)
+/*++
+
+Routine Description:
+
+    Copy (and reformat, if necessary) pixels from the internal scratch
+    buffer.  If the output format decimates chrominance, do it here.
+
+Arguments:
+
+    Buffer -
+        The output buffer to fill.
+
+    Size -
+        The size of the output buffer in bytes.
+
+    Stride -
+        The length of a row in bytes.
+
+Return Value:
+
+    Number of bytes copied into Buffer.
+
+--*/
+{
+    PAGED_CODE();
+
+    NT_ASSERT( Buffer );
+    NT_ASSERT( m_Buffer );
+    NT_ASSERT( Size >= Stride * m_Height );
+    NT_ASSERT( (Stride&3)==0 );
+    NT_ASSERT( (m_Width&1) == 0 );
+    NT_ASSERT( (m_Height&1) == 0 );
+    NT_ASSERT( m_Width>1 && m_Height>1 );
+    NT_ASSERT( (Size&1)==0 );
+
+    //  In most cases, stride isn't initialized.
+    //  If so, just assume its the Width.
+    if( Stride==0 )
+    {
+        Stride = m_OutputStride;
+    }
+
+    if( !(  Buffer &&
+            m_Buffer &&
+            Size >= Stride * m_Height &&
+            (Stride&3)==0 &&
+            (m_Width&1) == 0 &&
+            (m_Height&1) == 0 &&
+            m_Width>1 && m_Height>1 &&
+            (Size&1)==0
+         ) )
+    {
+        //  Wipe the destination before returning failure.
+        return 0;
+    }
+
+    PKS_RGBQUAD pSrc = (PKS_RGBQUAD) m_Buffer;
+    ULONG   RowLimit = min( m_Height, Size / Stride );
+    ULONG   ColLimit = min( m_Width,  Stride/sizeof(WORD) ) & ~0x1;
+
+    for(ULONG row = 0; row < RowLimit; row++)
+    {
+        PDWORD  pY  = (PDWORD) &Buffer[ row * Stride ];
+
+        for(ULONG col = 0; col < ColLimit; col+=2)
+        {
+            KS_RGBQUAD  L = pSrc[col+0];
+            KS_RGBQUAD  R = pSrc[col+1];
+
+            *pY++ =
+                MAKELONG( MAKEWORD( L.rgbGreen, (ULONG(L.rgbBlue) + R.rgbBlue)/2),
+                          MAKEWORD( R.rgbGreen, (ULONG(L.rgbRed ) + R.rgbRed )/2) );
+        }
+        pSrc = (PKS_RGBQUAD) (((PUCHAR) pSrc) + m_SynthesisStride);
+    }
+
+    return RowLimit * Stride;
+}
+// suppressed due to Esp:773
+#pragma warning (pop)