rawIOrgba.cpp

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  *
   3  * $Id$
   4  *
   5  * The MIT License
   6  *
   7  * Copyright (c) 2008 BBC Research
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
  26  *
  27  * ***** END LICENSE BLOCK ***** */
  28
  29 #include <assert.h>
  30 #include "rawIOrgba.h"
  31
  32 /* this could be improved by reading a larger chunk and then converting
  33  * the endianness suitably.  Reading / writing converts the chroma values
  34  * to offset binary ycbcr. */
  35 RawFrame& RawReaderrgba::read(RawFrame &f)
  36 {
  37         assert(f.chroma == RawFrame::CrRGB);
  38
  39         size_t linesRead;
  40         size_t lineLen = f.luma.width() * 4;
  41         unsigned char *inLine = new unsigned char[lineLen];
  42
  43         for (int y = 0; y < f.luma.height(); y++) {
  44
  45                 linesRead = fread(inLine, lineLen, 1, infile);
  46
  47                 for (int in = 0, x = 0; x < f.luma.width(); in+=4, x++) {
  48                         /* RGB */
  49                         f.r[y][x] = inLine[in + 0];
  50                         f.g[y][x] = inLine[in + 1];
  51                         f.b[y][x] = inLine[in + 2];
  52                         //don't bother reading alpha
  53                 }
  54
  55                 if (linesRead < 1)
  56                         goto exit;
  57         }
  58
  59         exit:
  60
  61         //if (feof (infile))
  62         //    throw /* some eof/shortread exception */ ;
  63         free(inLine);
  64         return f;
  65 }
  66
  67 RawFrame& RawReaderrgba::read()
  68 {
  69         throw /* unknown framesize */;
  70 }
  71
  72 void RawWriterrgba::write(const RawFrame& f) const
  73 {
  74         assert(f.chroma == RawFrame::CrRGB);
  75         for (int y = 0; y < f.luma.height(); y++)
  76                 for (int x = 0; x < f.luma.width(); x++) {
  77                         /* RGB*/
  78                         fputc(f.r[y][x], outfile);
  79                         fputc(f.g[y][x], outfile);
  80                         fputc(f.b[y][x], outfile);
  81                         fputc(0xff, outfile);
  82                 }
  83 }