Implements RGB to YV12 conversion in YASM.

media/base/simd/convert_rgb_to_yuv_ssse3.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_BASE_SIMD_CONVERT_RGB_TO_YUV_SSSE3_H_
+#define MEDIA_BASE_SIMD_CONVERT_RGB_TO_YUV_SSSE3_H_
+
+namespace media {

[Alpha Left Google, 2011/09/06 17:08:32]

Please remove namespace for assembly functions, it'll make refactoring easier
later.

+namespace simd {
+
+// The header file for ASM functions that convert a row of pixels with SSSE3
+// instructions so we can call them from C++ code. These functions are
+// implemented in "convert_rgb_to_yuv_ssse3.asm".
+
+#ifdef ENABLE_SUBSAMPLING

[Alpha Left Google, 2011/09/06 17:08:32]

Actually we don't need to have ifdef, we can always choose not to use them in
the .cc entry point.

+// Convert a row of 24-bit RGB pixels to YV12 pixels.
+void ConvertRGBToYUVEven_SSSE3(const uint8* rgb,
+                               uint8* y,
+                               uint8* u,
+                               uint8* v,
+                               int width);
+void ConvertRGBToYUVOdd_SSSE3(const uint8* rgb,
+                              uint8* y,
+                              uint8* u,
+                              uint8* v,
+                              int width);
+
+// Convert a row of 32-bit RGB pixels to YV12 pixels.
+void ConvertARGBToYUVEven_SSSE3(const uint8* argb,
+                                uint8* y,
+                                uint8* u,
+                                uint8* v,
+                                int width);
+void ConvertARGBToYUVOdd_SSSE3(const uint8* argb,
+                               uint8* y,
+                               uint8* u,
+                               uint8* v,
+                               int width);
+#else
+// Convert a row of 24-bit RGB pixels to YV12 pixels.
+void ConvertRGBToYUVRow_SSSE3(const uint8* rgb,
+                              uint8* y,
+                              uint8* u,
+                              uint8* v,
+                              int width);
+
+// Convert a row of 32-bit RGB pixels to YV12 pixels.
+void ConvertARGBToYUVRow_SSSE3(const uint8* argb,
+                               uint8* y,
+                               uint8* u,
+                               uint8* v,
+                               int width);
+#endif
+
+}  // namespace simd
+}  // namespace media
+
+#endif  // MEDIA_BASE_SIMD_CONVERT_RGB_TO_YUV_SSSE3_H_