I420Alpha row function in 1 pass

include/libyuv/row.h

Index: include/libyuv/row.h
diff --git a/include/libyuv/row.h b/include/libyuv/row.h
index 757fa0756a18d23c1f843159ff72679703a5c567..acfe90047bafd2dd3ab6906e473916908d8bc04f 100644
--- a/include/libyuv/row.h
+++ b/include/libyuv/row.h
@@ -187,6 +187,14 @@ extern "C" {
 #define HAS_I422TOABGRROW_SSSE3
 #endif
 
+
+// The following are available on 32 bit x86 Visual C and clangcl.
+// TODO(fbarchard): Port to gcc.
+#if !defined(LIBYUV_DISABLE_X86) && defined (_M_IX86) 
+#define HAS_I422ALPHATOARGBROW_SSSE3
+#define HAS_I422ALPHATOABGRROW_SSSE3
+#endif    
+
 // The following are available for AVX2 Visual C and clangcl 32 bit:
 // TODO(fbarchard): Port to gcc.
 #if !defined(LIBYUV_DISABLE_X86) && defined(_M_IX86) && \
@@ -257,6 +265,7 @@ extern "C" {
 #endif
 
 // The following are disabled when SSSE3 is available:
+// TODO(fbarchard): remove sse2.  ssse3 is faster and well supported.
 #if !defined(LIBYUV_DISABLE_X86) && \
     (defined(_M_IX86) || defined(__x86_64__) || defined(__i386__)) && \
     !defined(LIBYUV_SSSE3_ONLY)
@@ -1045,6 +1054,20 @@ void I422ToARGBRow_C(const uint8* src_y,
                      uint8* dst_argb,
                      struct YuvConstants* yuvconstants,
                      int width);
+void I422AlphaToARGBRow_C(const uint8* y_buf,
+                          const uint8* u_buf,
+                          const uint8* v_buf,
+                          const uint8* a_buf,
+                          uint8* dst_argb,
+                          struct YuvConstants* yuvconstants,
+                          int width);
+void I422AlphaToABGRRow_C(const uint8* y_buf,
+                          const uint8* u_buf,
+                          const uint8* v_buf,
+                          const uint8* a_buf,
+                          uint8* dst_argb,
+                          struct YuvConstants* yuvconstants,
+                          int width);
 void I422ToABGRRow_C(const uint8* src_y,
                      const uint8* src_u,
                      const uint8* src_v,
@@ -1213,6 +1236,20 @@ void I422ToARGBRow_SSSE3(const uint8* src_y,
                          uint8* dst_argb,
                          struct YuvConstants* yuvconstants,
                          int width);
+void I422AlphaToARGBRow_SSSE3(const uint8* y_buf,
+                              const uint8* u_buf,
+                              const uint8* v_buf,
+                              const uint8* a_buf,
+                              uint8* dst_argb,
+                              struct YuvConstants* yuvconstants,
+                              int width);
+void I422AlphaToABGRRow_SSSE3(const uint8* y_buf,
+                              const uint8* u_buf,
+                              const uint8* v_buf,
+                              const uint8* a_buf,
+                              uint8* dst_argb,
+                              struct YuvConstants* yuvconstants,
+                              int width);
 void I422ToARGBRow_SSSE3(const uint8* src_y,
                          const uint8* src_u,
                          const uint8* src_v,
@@ -1405,6 +1442,20 @@ void I422ToARGBRow_Any_SSSE3(const uint8* src_y,
                              uint8* dst_argb,
                              struct YuvConstants* yuvconstants,
                              int width);
+void I422AlphaToARGBRow_Any_SSSE3(const uint8* y_buf,
+                                  const uint8* u_buf,
+                                  const uint8* v_buf,
+                                  const uint8* a_buf,
+                                  uint8* dst_argb,
+                                  struct YuvConstants* yuvconstants,
+                                  int width);
+void I422AlphaToABGRRow_Any_SSSE3(const uint8* y_buf,
+                                  const uint8* u_buf,
+                                  const uint8* v_buf,
+                                  const uint8* a_buf,
+                                  uint8* dst_abgr,
+                                  struct YuvConstants* yuvconstants,
+                                  int width);
 void I411ToARGBRow_Any_SSSE3(const uint8* src_y,
                              const uint8* src_u,
                              const uint8* src_v,