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faster imageresampler (#1744)

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This commit is contained in:
Thinner77
2024-05-24 09:13:33 +02:00
committed by GitHub
parent e6714b21f9
commit bde5d156a9
3 changed files with 147 additions and 68 deletions
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190
libsrc/utils/ImageResampler.cpp
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@@ -29,9 +29,6 @@ void ImageResampler::processImage(const uint8_t * data, int width, int height, i
int cropTop = _cropTop;
int cropBottom = _cropBottom;
int xDestFlip = 0, yDestFlip = 0;
int uOffset = 0, vOffset = 0;
// handle 3D mode
switch (_videoMode)
{
@@ -53,118 +50,175 @@ void ImageResampler::processImage(const uint8_t * data, int width, int height, i
outputImage.resize(outputWidth, outputHeight);
for (int yDest = 0, ySource = cropTop + (_verticalDecimation >> 1); yDest < outputHeight; ySource += _verticalDecimation, ++yDest)
int xDestStart, xDestEnd;
int yDestStart, yDestEnd;
switch (_flipMode)
{
int yOffset = lineLength * ySource;
if (pixelFormat == PixelFormat::NV12)
{
uOffset = (height + ySource / 2) * lineLength;
}
else if (pixelFormat == PixelFormat::I420)
{
uOffset = width * height + (ySource/2) * width/2;
vOffset = width * height * 1.25 + (ySource/2) * width/2;
}
case FlipMode::NO_CHANGE:
xDestStart = 0;
xDestEnd = outputWidth-1;
yDestStart = 0;
yDestEnd = outputHeight-1;
break;
case FlipMode::HORIZONTAL:
xDestStart = 0;
xDestEnd = outputWidth-1;
yDestStart = -(outputHeight-1);
yDestEnd = 0;
break;
case FlipMode::VERTICAL:
xDestStart = -(outputWidth-1);
xDestEnd = 0;
yDestStart = 0;
yDestEnd = outputHeight-1;
break;
case FlipMode::BOTH:
xDestStart = -(outputWidth-1);
xDestEnd = 0;
yDestStart = -(outputHeight-1);
yDestEnd = 0;
break;
}
for (int xDest = 0, xSource = cropLeft + (_horizontalDecimation >> 1); xDest < outputWidth; xSource += _horizontalDecimation, ++xDest)
switch (pixelFormat)
{
case PixelFormat::UYVY:
{
switch (_flipMode)
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
case FlipMode::HORIZONTAL:
xDestFlip = xDest;
yDestFlip = outputHeight-yDest-1;
break;
case FlipMode::VERTICAL:
xDestFlip = outputWidth-xDest-1;
yDestFlip = yDest;
break;
case FlipMode::BOTH:
xDestFlip = outputWidth-xDest-1;
yDestFlip = outputHeight-yDest-1;
break;
case FlipMode::NO_CHANGE:
xDestFlip = xDest;
yDestFlip = yDest;
break;
}
ColorRgb &rgb = outputImage(xDestFlip, yDestFlip);
switch (pixelFormat)
{
case PixelFormat::UYVY:
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int index = yOffset + (xSource << 1);
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int index = lineLength * ySource + (xSource << 1);
uint8_t y = data[index+1];
uint8_t u = ((xSource&1) == 0) ? data[index ] : data[index-2];
uint8_t v = ((xSource&1) == 0) ? data[index+2] : data[index ];
ColorSys::yuv2rgb(y, u, v, rgb.red, rgb.green, rgb.blue);
}
break;
case PixelFormat::YUYV:
}
break;
}
case PixelFormat::YUYV:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int index = yOffset + (xSource << 1);
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int index = lineLength * ySource + (xSource << 1);
uint8_t y = data[index];
uint8_t u = ((xSource&1) == 0) ? data[index+1] : data[index-1];
uint8_t v = ((xSource&1) == 0) ? data[index+3] : data[index+1];
ColorSys::yuv2rgb(y, u, v, rgb.red, rgb.green, rgb.blue);
}
break;
case PixelFormat::BGR16:
}
break;
}
case PixelFormat::BGR16:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int index = yOffset + (xSource << 1);
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int index = lineLength * ySource + (xSource << 1);
rgb.blue = (data[index] & 0x1f) << 3;
rgb.green = (((data[index+1] & 0x7) << 3) | (data[index] & 0xE0) >> 5) << 2;
rgb.red = (data[index+1] & 0xF8);
}
break;
case PixelFormat::BGR24:
}
break;
}
case PixelFormat::BGR24:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int index = yOffset + (xSource << 1) + xSource;
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int index = lineLength * ySource + (xSource << 1) + xSource;
rgb.blue = data[index ];
rgb.green = data[index+1];
rgb.red = data[index+2];
}
break;
case PixelFormat::RGB32:
}
break;
}
case PixelFormat::RGB32:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int index = yOffset + (xSource << 2);
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int index = lineLength * ySource + (xSource << 2);
rgb.red = data[index ];
rgb.green = data[index+1];
rgb.blue = data[index+2];
}
break;
case PixelFormat::BGR32:
}
break;
}
case PixelFormat::BGR32:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int index = yOffset + (xSource << 2);
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int index = lineLength * ySource + (xSource << 2);
rgb.blue = data[index ];
rgb.green = data[index+1];
rgb.red = data[index+2];
}
break;
case PixelFormat::NV12:
}
break;
}
case PixelFormat::NV12:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
int uOffset = (height + ySource / 2) * lineLength;
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
uint8_t y = data[yOffset + xSource];
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
uint8_t y = data[lineLength * ySource + xSource];
uint8_t u = data[uOffset + ((xSource >> 1) << 1)];
uint8_t v = data[uOffset + ((xSource >> 1) << 1) + 1];
ColorSys::yuv2rgb(y, u, v, rgb.red, rgb.green, rgb.blue);
}
break;
case PixelFormat::I420:
}
break;
}
case PixelFormat::I420:
{
for (int yDest = yDestStart, ySource = cropTop + (_verticalDecimation >> 1); yDest <= yDestEnd; ySource += _verticalDecimation, ++yDest)
{
int uOffset = width * height + (ySource/2) * width/2;
int vOffset = width * height * 1.25 + (ySource/2) * width/2;
for (int xDest = xDestStart, xSource = cropLeft + (_horizontalDecimation >> 1); xDest <= xDestEnd; xSource += _horizontalDecimation, ++xDest)
{
int y = data[yOffset + xSource];
ColorRgb & rgb = outputImage(abs(xDest), abs(yDest));
int y = data[lineLength * ySource + xSource];
int u = data[uOffset + (xSource >> 1)];
int v = data[vOffset + (xSource >> 1)];
ColorSys::yuv2rgb(y, u, v, rgb.red, rgb.green, rgb.blue);
break;
}
break;
case PixelFormat::MJPEG:
break;
case PixelFormat::NO_CHANGE:
Error(Logger::getInstance("ImageResampler"), "Invalid pixel format given");
break;
}
break;
}
case PixelFormat::MJPEG:
break;
case PixelFormat::NO_CHANGE:
Error(Logger::getInstance("ImageResampler"), "Invalid pixel format given");
break;
}
}