openni_image_yuv_422.cpp
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38 #include <sstream>
39 #include <iostream>
40 
41 #define CLIP_CHAR(c) ((c)>255?255:(c)<0?0:(c))
42 
43 using namespace std;
44 namespace openni_wrapper
45 {
46 
47 ImageYUV422::ImageYUV422 (boost::shared_ptr<xn::ImageMetaData> image_meta_data) throw ()
48 : Image (image_meta_data)
49 {
50 }
51 
52 ImageYUV422::~ImageYUV422 () throw ()
53 {
54 }
55 
56 bool ImageYUV422::isResizingSupported (unsigned input_width, unsigned input_height, unsigned output_width, unsigned output_height) const
57 {
58  return ImageYUV422::resizingSupported (input_width, input_height, output_width, output_height);
59 }
60 
61 void ImageYUV422::fillRGB (unsigned width, unsigned height, unsigned char* rgb_buffer, unsigned rgb_line_step) const throw (OpenNIException)
62 {
63  // 0 1 2 3
64  // u y1 v y2
65 
66  if (image_md_->XRes() != width && image_md_->YRes() != height)
67  {
68  if (width > image_md_->XRes () || height > image_md_->YRes ())
69  THROW_OPENNI_EXCEPTION ("Upsampling not supported. Request was: %d x %d -> %d x %d", image_md_->XRes (), image_md_->YRes (), width, height);
70 
71  if ( image_md_->XRes () % width != 0 || image_md_->YRes () % height != 0
72  || (image_md_->XRes () / width) & 0x01 || (image_md_->YRes () / height & 0x01) )
73  THROW_OPENNI_EXCEPTION ("Downsampling only possible for power of two scale in both dimensions. Request was %d x %d -> %d x %d.", image_md_->XRes (), image_md_->YRes (), width, height);
74  }
75 
76  register const XnUInt8* yuv_buffer = image_md_->WritableData();
77 
78  unsigned rgb_line_skip = 0;
79  if (rgb_line_step != 0)
80  rgb_line_skip = rgb_line_step - width * 3;
81 
82  if (image_md_->XRes() == width && image_md_->YRes() == height)
83  {
84  for( register unsigned yIdx = 0; yIdx < height; ++yIdx, rgb_buffer += rgb_line_skip )
85  {
86  for( register unsigned xIdx = 0; xIdx < width; xIdx += 2, rgb_buffer += 6, yuv_buffer += 4 )
87  {
88  int v = yuv_buffer[2] - 128;
89  int u = yuv_buffer[0] - 128;
90 
91  rgb_buffer[0] = CLIP_CHAR (yuv_buffer[1] + ((v * 18678 + 8192 ) >> 14));
92  rgb_buffer[1] = CLIP_CHAR (yuv_buffer[1] + ((v * -9519 - u * 6472 + 8192 ) >> 14));
93  rgb_buffer[2] = CLIP_CHAR (yuv_buffer[1] + ((u * 33292 + 8192 ) >> 14));
94 
95  rgb_buffer[3] = CLIP_CHAR (yuv_buffer[3] + ((v * 18678 + 8192 ) >> 14));
96  rgb_buffer[4] = CLIP_CHAR (yuv_buffer[3] + ((v * -9519 - u * 6472 + 8192 ) >> 14));
97  rgb_buffer[5] = CLIP_CHAR (yuv_buffer[3] + ((u * 33292 + 8192 ) >> 14));
98  }
99  }
100  }
101  else
102  {
103  register unsigned yuv_step = image_md_->XRes() / width;
104  register unsigned yuv_x_step = yuv_step << 1;
105  register unsigned yuv_skip = (image_md_->YRes() / height - 1) * ( image_md_->XRes() << 1 );
106 
107  for( register unsigned yIdx = 0; yIdx < image_md_->YRes(); yIdx += yuv_step, yuv_buffer += yuv_skip, rgb_buffer += rgb_line_skip )
108  {
109  for( register unsigned xIdx = 0; xIdx < image_md_->XRes(); xIdx += yuv_step, rgb_buffer += 3, yuv_buffer += yuv_x_step )
110  {
111  int v = yuv_buffer[2] - 128;
112  int u = yuv_buffer[0] - 128;
113 
114  rgb_buffer[0] = CLIP_CHAR (yuv_buffer[1] + ((v * 18678 + 8192 ) >> 14));
115  rgb_buffer[1] = CLIP_CHAR (yuv_buffer[1] + ((v * -9519 - u * 6472 + 8192 ) >> 14));
116  rgb_buffer[2] = CLIP_CHAR (yuv_buffer[1] + ((u * 33292 + 8192 ) >> 14));
117  }
118  }
119  }
120 }
121 
122 void ImageYUV422::fillGrayscale (unsigned width, unsigned height, unsigned char* gray_buffer, unsigned gray_line_step) const throw (OpenNIException)
123 {
124  // u y1 v y2
125  if (width > image_md_->XRes () || height > image_md_->YRes ())
126  THROW_OPENNI_EXCEPTION ("Upsampling not supported. Request was: %d x %d -> %d x %d", image_md_->XRes (), image_md_->YRes (), width, height);
127 
128  if (image_md_->XRes () % width != 0 || image_md_->YRes () % height != 0)
129  THROW_OPENNI_EXCEPTION ("Downsampling only possible for integer scales in both dimensions. Request was %d x %d -> %d x %d.", image_md_->XRes (), image_md_->YRes (), width, height);
130 
131  unsigned gray_line_skip = 0;
132  if (gray_line_step != 0)
133  gray_line_skip = gray_line_step - width;
134 
135  register unsigned yuv_step = image_md_->XRes() / width;
136  register unsigned yuv_x_step = yuv_step << 1;
137  register unsigned yuv_skip = (image_md_->YRes() / height - 1) * ( image_md_->XRes() << 1 );
138  register const XnUInt8* yuv_buffer = (image_md_->WritableData() + 1);
139 
140  for( register unsigned yIdx = 0; yIdx < image_md_->YRes(); yIdx += yuv_step, yuv_buffer += yuv_skip, gray_buffer += gray_line_skip )
141  {
142  for( register unsigned xIdx = 0; xIdx < image_md_->XRes(); xIdx += yuv_step, ++gray_buffer, yuv_buffer += yuv_x_step )
143  {
144  *gray_buffer = *yuv_buffer;
145  }
146  }
147 }
148 } //namespace
#define THROW_OPENNI_EXCEPTION(format,...)
Image class containing just a reference to image meta data. Thus this class just provides an interfac...
Definition: openni_image.h:54
General exception class.
#define CLIP_CHAR(c)


openni_camera
Author(s): Patrick Mihelich, Suat Gedikli, Radu Bogdan Rusu
autogenerated on Mon Jun 10 2019 14:15:53