videoData.h

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  *
   3  * The MIT License
   4  *
   5  * Copyright (c) 2008 BBC Research
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
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  15  * all copies or substantial portions of the Software.
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  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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  25  * ***** END LICENSE BLOCK ***** */
  26
  27 #ifndef VIDEODATA_H_
  28 #define VIDEODATA_H_
  29
  30 #include <GL/glew.h>
  31
  32 class VideoData {
  33 public:
  34
  35         enum DataFmt {
  36                 V8P0 = 0,
  37                 V8P2,
  38                 V8P4,
  39                 YV12,
  40                 V16P0,
  41                 V16P2,
  42                 V16P4,
  43                 UYVY,
  44                 V216,
  45                 V210,
  46                 Unknown}; //how is the data packed?
  47
  48         VideoData();
  49         void resize(int w, int h, DataFmt f);
  50         ~VideoData();
  51
  52         void convertV210();
  53         void convertPlanar16();
  54
  55         unsigned long frameNum;
  56         bool isLastFrame; //mark the first and last frames in a sequence
  57         bool isFirstFrame;
  58
  59         DataFmt diskFormat; //enumerated format read from the disk
  60         DataFmt renderFormat; //pixel packing used for openGL rendering
  61
  62         bool isPlanar; //flag to indicate that we have a seperate texture for each component to copy to the GPU
  63
  64         GLenum glInternalFormat; //format used to describe which components of the texture are applied to the texels
  65         GLenum glFormat; //format of the texture data, GL_LUMINANCE or GL_RGBA in these applications
  66         GLenum glType; //the data type for the texture, GL_UNSIGNED_BYTE, GL_INT etc...
  67         int glMinMaxFilter; //filter type for scaling the pixel data GL_LINEAR for planar, or GL_NEAREST for packed
  68         int glYTextureWidth; //the width of the Y texture, which may actually be UYVY data packed as RGBA. There
  69         //will be half the number of RGBA quads as Y pixels across the image as each quad
  70         //stores two luminance samples
  71
  72         int Ywidth; //luminance dimensions in pixels
  73         int Yheight;
  74
  75         int Cwidth; //chrominance dimensions in pixels
  76         int Cheight;
  77
  78         int dataSize; //total allocation at *data
  79         int YdataSize; //number of bytes for each component
  80         int UdataSize;
  81         int VdataSize;
  82
  83         unsigned char *data; //pointer to allocated block
  84         unsigned char *Ydata; //pointer to luminance, or multiplexed YCbCr
  85         unsigned char *Udata; //pointers to planar chrominance components, if format is planar
  86         unsigned char *Vdata;
  87
  88 private:
  89         VideoData(const VideoData&);
  90         void operator= (const VideoData&);
  91         void allocate(int w, int h, DataFmt f);
  92 };
  93
  94 #endif