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/*
* 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.
*/
#define LOG_NDEBUG 0
#define LOG_TAG "YUVCanvas"
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/YUVCanvas.h>
#include <media/stagefright/YUVImage.h>
#include <ui/Rect.h>
namespace android {
YUVCanvas::YUVCanvas(YUVImage &yuvImage)
: mYUVImage(yuvImage) {
}
YUVCanvas::~YUVCanvas() {
}
void YUVCanvas::FillYUV(uint8_t yValue, uint8_t uValue, uint8_t vValue) {
for (int32_t y = 0; y < mYUVImage.height(); ++y) {
for (int32_t x = 0; x < mYUVImage.width(); ++x) {
mYUVImage.setPixelValue(x, y, yValue, uValue, vValue);
}
}
}
void YUVCanvas::FillYUVRectangle(const Rect& rect,
uint8_t yValue, uint8_t uValue, uint8_t vValue) {
for (int32_t y = rect.top; y < rect.bottom; ++y) {
for (int32_t x = rect.left; x < rect.right; ++x) {
mYUVImage.setPixelValue(x, y, yValue, uValue, vValue);
}
}
}
void YUVCanvas::CopyImageRect(
const Rect& srcRect,
int32_t destStartX, int32_t destStartY,
const YUVImage &srcImage) {
// Try fast copy first
if (YUVImage::fastCopyRectangle(
srcRect,
destStartX, destStartY,
srcImage, mYUVImage)) {
return;
}
int32_t srcStartX = srcRect.left;
int32_t srcStartY = srcRect.top;
for (int32_t offsetY = 0; offsetY < srcRect.height(); ++offsetY) {
for (int32_t offsetX = 0; offsetX < srcRect.width(); ++offsetX) {
int32_t srcX = srcStartX + offsetX;
int32_t srcY = srcStartY + offsetY;
int32_t destX = destStartX + offsetX;
int32_t destY = destStartY + offsetY;
uint8_t yValue;
uint8_t uValue;
uint8_t vValue;
srcImage.getPixelValue(srcX, srcY, &yValue, &uValue, &vValue);
mYUVImage.setPixelValue(destX, destY, yValue, uValue, vValue);
}
}
}
void YUVCanvas::downsample(
int32_t srcOffsetX, int32_t srcOffsetY,
int32_t skipX, int32_t skipY,
const YUVImage &srcImage) {
// TODO: Add a low pass filter for downsampling.
// Check that srcImage is big enough to fill mYUVImage.
CHECK((srcOffsetX + (mYUVImage.width() - 1) * skipX) < srcImage.width());
CHECK((srcOffsetY + (mYUVImage.height() - 1) * skipY) < srcImage.height());
uint8_t yValue;
uint8_t uValue;
uint8_t vValue;
int32_t srcY = srcOffsetY;
for (int32_t y = 0; y < mYUVImage.height(); ++y) {
int32_t srcX = srcOffsetX;
for (int32_t x = 0; x < mYUVImage.width(); ++x) {
srcImage.getPixelValue(srcX, srcY, &yValue, &uValue, &vValue);
mYUVImage.setPixelValue(x, y, yValue, uValue, vValue);
srcX += skipX;
}
srcY += skipY;
}
}
} // namespace android
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