1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_NDEBUG 0 18#define LOG_TAG "YUVCanvas" 19 20#include <media/stagefright/foundation/ADebug.h> 21#include <media/stagefright/YUVCanvas.h> 22#include <media/stagefright/YUVImage.h> 23#include <ui/Rect.h> 24 25namespace android { 26 27YUVCanvas::YUVCanvas(YUVImage &yuvImage) 28 : mYUVImage(yuvImage) { 29} 30 31YUVCanvas::~YUVCanvas() { 32} 33 34void YUVCanvas::FillYUV(uint8_t yValue, uint8_t uValue, uint8_t vValue) { 35 for (int32_t y = 0; y < mYUVImage.height(); ++y) { 36 for (int32_t x = 0; x < mYUVImage.width(); ++x) { 37 mYUVImage.setPixelValue(x, y, yValue, uValue, vValue); 38 } 39 } 40} 41 42void YUVCanvas::FillYUVRectangle(const Rect& rect, 43 uint8_t yValue, uint8_t uValue, uint8_t vValue) { 44 for (int32_t y = rect.top; y < rect.bottom; ++y) { 45 for (int32_t x = rect.left; x < rect.right; ++x) { 46 mYUVImage.setPixelValue(x, y, yValue, uValue, vValue); 47 } 48 } 49} 50 51void YUVCanvas::CopyImageRect( 52 const Rect& srcRect, 53 int32_t destStartX, int32_t destStartY, 54 const YUVImage &srcImage) { 55 56 // Try fast copy first 57 if (YUVImage::fastCopyRectangle( 58 srcRect, 59 destStartX, destStartY, 60 srcImage, mYUVImage)) { 61 return; 62 } 63 64 int32_t srcStartX = srcRect.left; 65 int32_t srcStartY = srcRect.top; 66 for (int32_t offsetY = 0; offsetY < srcRect.height(); ++offsetY) { 67 for (int32_t offsetX = 0; offsetX < srcRect.width(); ++offsetX) { 68 int32_t srcX = srcStartX + offsetX; 69 int32_t srcY = srcStartY + offsetY; 70 71 int32_t destX = destStartX + offsetX; 72 int32_t destY = destStartY + offsetY; 73 74 uint8_t yValue; 75 uint8_t uValue; 76 uint8_t vValue; 77 78 srcImage.getPixelValue(srcX, srcY, &yValue, &uValue, &vValue); 79 mYUVImage.setPixelValue(destX, destY, yValue, uValue, vValue); 80 } 81 } 82} 83 84void YUVCanvas::downsample( 85 int32_t srcOffsetX, int32_t srcOffsetY, 86 int32_t skipX, int32_t skipY, 87 const YUVImage &srcImage) { 88 // TODO: Add a low pass filter for downsampling. 89 90 // Check that srcImage is big enough to fill mYUVImage. 91 CHECK((srcOffsetX + (mYUVImage.width() - 1) * skipX) < srcImage.width()); 92 CHECK((srcOffsetY + (mYUVImage.height() - 1) * skipY) < srcImage.height()); 93 94 uint8_t yValue; 95 uint8_t uValue; 96 uint8_t vValue; 97 98 int32_t srcY = srcOffsetY; 99 for (int32_t y = 0; y < mYUVImage.height(); ++y) { 100 int32_t srcX = srcOffsetX; 101 for (int32_t x = 0; x < mYUVImage.width(); ++x) { 102 srcImage.getPixelValue(srcX, srcY, &yValue, &uValue, &vValue); 103 mYUVImage.setPixelValue(x, y, yValue, uValue, vValue); 104 105 srcX += skipX; 106 } 107 srcY += skipY; 108 } 109} 110 111} // namespace android 112