Adding YUVImage and YUVCanvas.

YUVImage is a container class to hold YUV data and provide
various utilities, e.g. to set/get pixel values for different
YUV formats, fast copying routines, etc.
Currently supported YUV420 Planar and YUV420 Semi Planar.

YUVCanvas holds a reference to a YUVImage on which it can do various
drawing operations.

Change-Id: I052a57b7fbc834efe1626914f76c04c091996cac

1 files changed, 67 insertions, 0 deletions

diff --git a/include/media/stagefright/YUVCanvas.h b/include/media/stagefright/YUVCanvas.h
new file mode 100644
index 0000000..5e17046
--- /dev/null
+++ b/include/media/stagefright/YUVCanvas.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// YUVCanvas holds a reference to a YUVImage on which it can do various
+// drawing operations. It provides various utility functions for filling,
+// cropping, etc.
+
+
+#ifndef YUV_CANVAS_H_
+
+#define YUV_CANVAS_H_
+
+#include <stdint.h>
+
+namespace android {
+
+class YUVImage;
+class Rect;
+
+class YUVCanvas {
+public:
+
+    // Constructor takes in reference to a yuvImage on which it can do
+    // various drawing opreations.
+    YUVCanvas(YUVImage &yuvImage);
+    ~YUVCanvas();
+
+    // Fills the entire image with the given YUV values.
+    void FillYUV(uint8_t yValue, uint8_t uValue, uint8_t vValue);
+
+    // Fills the rectangular region [startX,endX]x[startY,endY] with the given YUV values.
+    void FillYUVRectangle(const Rect& rect,
+            uint8_t yValue, uint8_t uValue, uint8_t vValue);
+
+    // Copies the region [startX,endX]x[startY,endY] from srcImage into the
+    // canvas' target image (mYUVImage) starting at
+    // (destinationStartX,destinationStartY).
+    // Note that undefined behavior may occur if srcImage is same as the canvas'
+    // target image.
+    void CopyImageRect(
+            const Rect& srcRect,
+            int32_t destStartX, int32_t destStartY,
+            const YUVImage &srcImage);
+
+private:
+    YUVImage& mYUVImage;
+
+    YUVCanvas(const YUVCanvas &);
+    YUVCanvas &operator=(const YUVCanvas &);
+};
+
+}  // namespace android
+
+#endif  // YUV_CANVAS_H_