Reimplement NV21ToARGB to allow different color matrix.

source/row_neon64.cc

 /*
  *  Copyright 2014 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 558 matching lines @@
       "+r"(dst_argb),  // %2
       "+r"(width)      // %3
     : [kUVBiasBGR]"r"(&kYuvConstants.kUVBiasBGR),
       [kYToRgb]"r"(&kYuvConstants.kYToRgb)
     : "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
       "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
   );
 }
 #endif  // HAS_NV12TOARGBROW_NEON
 
+#ifdef HAS_NV12TOARGBROW_NEON
+void NV21ToARGBRow_NEON(const uint8* src_y,
+                        const uint8* src_vu,
+                        uint8* dst_argb,
+                        struct YuvConstants* yuvconstants,
+                        int width) {
+  asm volatile (
+    YUVTORGB_SETUP
+  "1:                                          \n"
+    READNV21
+    YUVTORGB(v22, v21, v20)
+    "subs       %w3, %w3, #8                   \n"
+    "movi       v23.8b, #255                   \n"
+    MEMACCESS(2)
+    "st4        {v20.8b,v21.8b,v22.8b,v23.8b}, [%2], #32     \n"
+    "b.gt       1b                             \n"
+    : "+r"(src_y),     // %0
+      "+r"(src_vu),    // %1
+      "+r"(dst_argb),  // %2
+      "+r"(width)      // %3
+    : [kUVBiasBGR]"r"(&kYuvConstants.kUVBiasBGR),
+      [kYToRgb]"r"(&kYuvConstants.kYToRgb)
+    : "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
+      "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
+  );
+}
+#endif  // HAS_NV12TOARGBROW_NEON
+
 #ifdef HAS_NV12TORGB565ROW_NEON
 void NV12ToRGB565Row_NEON(const uint8* src_y,
                           const uint8* src_uv,
                           uint8* dst_rgb565,
                           struct YuvConstants* yuvconstants,
                           int width) {
   asm volatile (
     YUVTORGB_SETUP
   "1:                                          \n"
     READNV12
@@ skipping 2424 matching lines @@
   : "cc", "memory", "v0", "v1", "v2", "v3"  // Clobber List
   );
 }
 #endif  // HAS_SOBELYROW_NEON
 #endif  // !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif