Implements RGB to YV12 conversion in YASM.

media/base/simd/convert_yuv_to_rgb.cc

+// 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.
+
+#include "media/base/simd/convert_yuv_to_rgb.h"
+
+#include "build/build_config.h"
+#include "media/base/cpu_features.h"
+#include "media/base/simd/convert_yuv_to_rgb_ssse3.h"
+
+namespace media {
+namespace simd {
+
+void ConvertYUVtoRGB32(const uint8* y_buf,
+                       const uint8* u_buf,
+                       const uint8* v_buf,
+                       uint8* rgb_buf,
+                       int width,
+                       int height,
+                       int y_pitch,
+                       int uv_pitch,
+                       int rgb_pitch,
+                       YUVType yuv_type) {
+  int uv_pitch0 = media::YV12 ? 0 : uv_pitch;
+  for (; height >= 2; height -= 2) {
+    ConvertYUVtoARGBRow(y_buf, u_buf, v_buf, rgb_buf, width);
+    rgb_buf += rgb_pitch;
+    y_buf += y_pitch;
+    u_buf += uv_pitch0;
+    v_buf += uv_pitch0;
+
+    ConvertYUVtoARGBRow(y_buf, u_buf, v_buf, rgb_buf, width);
+    rgb_buf += rgb_pitch;
+    y_buf += y_pitch;
+    u_buf += uv_pitch;
+    v_buf += uv_pitch;
+  }
+
+  if (height)
+    ConvertYUVtoARGBRow(y_buf, u_buf, v_buf, rgb_buf, width);
+}
+
+void ConvertYUVtoRGB24(const uint8* y_buf,
+                       const uint8* u_buf,
+                       const uint8* v_buf,
+                       uint8* rgb_buf,
+                       int width,
+                       int height,
+                       int y_pitch,
+                       int uv_pitch,
+                       int rgb_pitch,
+                       YUVType yuv_type) {
+  int uv_pitch0 = media::YV12 ? 0 : uv_pitch;
+  for (; height >= 2; height -= 2) {
+    ConvertYUVtoRGBRow(y_buf, u_buf, v_buf, rgb_buf, width);
+    rgb_buf += rgb_pitch;
+    y_buf += y_pitch;
+    u_buf += uv_pitch0;
+    v_buf += uv_pitch0;
+
+    ConvertYUVtoRGBRow(y_buf, u_buf, v_buf, rgb_buf, width);
+    rgb_buf += rgb_pitch;
+    y_buf += y_pitch;
+    u_buf += uv_pitch;
+    v_buf += uv_pitch;
+  }
+
+  if (height)
+    ConvertYUVtoRGBRow(y_buf, u_buf, v_buf, rgb_buf, width);
+}
+
+}  // namespace simd
+}  // namespace media