67 lines
1.2 KiB
C++
67 lines
1.2 KiB
C++
#include "stdafx.h"
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#include "jpeglib.h"
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JpegLib::JpegLib() :
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img_buffer(NULL), sizeBuffer(0)
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{
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handle = std::shared_ptr<void> (tjInitDecompress(),tjDestroy);
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}
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JpegLib::~JpegLib()
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{
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clear();
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}
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void JpegLib::clear()
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{
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img_buffer.reset();
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sizeBuffer = 0;
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}
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cv::Mat JpegLib::decode(cv::Mat& buf, int pixelFormat)
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{
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if(buf.rows != 1)
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return cv::Mat();
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decode(buf.data, buf.cols, pixelFormat);
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return cv::Mat(getHeight(), getWidth() , pixelFormat == TJPF_BGR ? CV_8UC3 : CV_8UC1, getData());
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}
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void JpegLib::decode(unsigned char* buff, unsigned long buff_size, int pixelFormat)
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{
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tjDecompressHeader(handle.get(), buff, buff_size, &width, &height);
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int size = width * height *tjPixelSize[pixelFormat];
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if (sizeBuffer != size)
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{
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clear();
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img_buffer = std::shared_ptr<unsigned char>(tjAlloc(size), tjFree);
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sizeBuffer = size;
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}
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if (img_buffer)
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{
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tjDecompress2(handle.get(), buff, buff_size, img_buffer.get(), width, 0, height, pixelFormat, 0);
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}
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}
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int JpegLib::getWidth()
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{
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return width;
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}
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int JpegLib::getHeight()
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{
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return height;
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}
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int JpegLib::getBufferSize()
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{
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return sizeBuffer;
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}
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unsigned char* JpegLib::getData()
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{
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return img_buffer.get();
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} |