Implements RGB to YV12 conversion in YASM.

media/base/simd/yuv_row.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.

[Alpha Left Google, 2011/08/22 14:16:59]

Rename this file to media/base/yuv_row_internal.h

+// 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_ROW_H_
+#define MEDIA_BASE_SIMD_CONVERT_ROW_H_
+
+namespace media {

[Alpha Left Google, 2011/08/22 14:16:59]

These function names are obscure enough that you don't need to have namespace,
makes it easier for your assembly functions.

+namespace simd {
+
+// The header file for ASM functions that convert a row of pixels with SIMD
+// instructions so we can call them from C++ code. These functions are
+// implemented in "convert_row.asm".
+
+// Convert a row of 24-bit RGB pixels to YV12 pixels.
+void ConvertRGBtoYUVRow(const uint8* argb,

[Alpha Left Google, 2011/08/22 14:16:59]

_SSE2 suffix.

+                        uint8* y,
+                        uint8* u,
+                        uint8* v,
+                        int width);
+
+// Convert a row of 32-bit ARGB pixels to YV12 pixels.
+void ConvertARGBtoYUVRow(const uint8* argb,

[Alpha Left Google, 2011/08/22 14:16:59]

_SSE2 suffix.

+                         uint8* y,
+                         uint8* u,
+                         uint8* v,
+                         int width);
+
+// Convert a row of YV12 pixels to 24-bit RGB pixels.
+void ConvertYUVtoRGBRow(const uint8* y,

[Alpha Left Google, 2011/08/22 14:16:59]

_SSE2 suffix.

+                        const uint8* u,
+                        const uint8* v,
+                        uint8* argb,
+                        int width);
+
+// Convert a row of YV12 pixels to 32-bit ARGB pixels. (This function sets the
+// alpha values to 255.)
+void ConvertYUVtoARGBRow(const uint8* y,

[Alpha Left Google, 2011/08/22 14:16:59]

_SSE2 suffix.

+                         const uint8* u,
+                         const uint8* v,
+                         uint8* argb,
+                         int width);
+
+}  // namespace simd
+}  // namespace media
+
+#endif  // MEDIA_BASE_SIMD_CONVERT_ROW_H_