doc/libtheora/latex/codec_8h.tex

   1 \section{codec.h File Reference}
   2 \label{codec_8h}\index{codec.h@{codec.h}}
   3
   4
   5 The shared {\ttfamily libtheoradec} and {\ttfamily libtheoraenc} C API.
   6 {\ttfamily \#include $<$ogg/ogg.h$>$}\par
   7 \subsection*{Data Structures}
   8 \begin{DoxyCompactItemize}
   9 \item
  10 struct {\bf th\_\-img\_\-plane}
  11 \begin{DoxyCompactList}\small\item\em A buffer for a single color plane in an uncompressed image. \item\end{DoxyCompactList}\item
  12 struct {\bf th\_\-info}
  13 \begin{DoxyCompactList}\small\item\em Theora bitstream information. \item\end{DoxyCompactList}\item
  14 struct {\bf th\_\-comment}
  15 \begin{DoxyCompactList}\small\item\em The comment information. \item\end{DoxyCompactList}\item
  16 struct {\bf th\_\-quant\_\-ranges}
  17 \begin{DoxyCompactList}\small\item\em A set of {\itshape qi\/} ranges. \item\end{DoxyCompactList}\item
  18 struct {\bf th\_\-quant\_\-info}
  19 \begin{DoxyCompactList}\small\item\em A complete set of quantization parameters. \item\end{DoxyCompactList}\item
  20 struct {\bf th\_\-huff\_\-code}
  21 \begin{DoxyCompactList}\small\item\em A Huffman code for a Theora DCT token. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
  22 \subsection*{Defines}
  23 \begin{DoxyCompactItemize}
  24 \item
  25 \#define {\bf \_\-O\_\-THEORA\_\-CODEC\_\-H\_\-}~(1)
  26 \item
  27 \#define {\bf TH\_\-NHUFFMAN\_\-TABLES}~(80)
  28 \begin{DoxyCompactList}\small\item\em The number of Huffman tables used by Theora. \item\end{DoxyCompactList}\item
  29 \#define {\bf TH\_\-NDCT\_\-TOKENS}~(32)
  30 \begin{DoxyCompactList}\small\item\em The number of DCT token values in each table. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
  31 \begin{Indent}{\bf Return codes}\par
  32 {\em \label{_amgrp800007e5fae550658ee577ca16693452}
  33  }\begin{DoxyCompactItemize}
  34 \item
  35 \#define {\bf TH\_\-EFAULT}~(-\/1)
  36 \begin{DoxyCompactList}\small\item\em An invalid pointer was provided. \item\end{DoxyCompactList}\item
  37 \#define {\bf TH\_\-EINVAL}~(-\/10)
  38 \begin{DoxyCompactList}\small\item\em An invalid argument was provided. \item\end{DoxyCompactList}\item
  39 \#define {\bf TH\_\-EBADHEADER}~(-\/20)
  40 \begin{DoxyCompactList}\small\item\em The contents of the header were incomplete, invalid, or unexpected. \item\end{DoxyCompactList}\item
  41 \#define {\bf TH\_\-ENOTFORMAT}~(-\/21)
  42 \begin{DoxyCompactList}\small\item\em The header does not belong to a Theora stream. \item\end{DoxyCompactList}\item
  43 \#define {\bf TH\_\-EVERSION}~(-\/22)
  44 \begin{DoxyCompactList}\small\item\em The bitstream version is too high. \item\end{DoxyCompactList}\item
  45 \#define {\bf TH\_\-EIMPL}~(-\/23)
  46 \begin{DoxyCompactList}\small\item\em The specified function is not implemented. \item\end{DoxyCompactList}\item
  47 \#define {\bf TH\_\-EBADPACKET}~(-\/24)
  48 \begin{DoxyCompactList}\small\item\em There were errors in the video data packet. \item\end{DoxyCompactList}\item
  49 \#define {\bf TH\_\-DUPFRAME}~(1)
  50 \begin{DoxyCompactList}\small\item\em The decoded packet represented a dropped frame. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
  51 \end{Indent}
  52 \subsection*{Typedefs}
  53 \begin{DoxyCompactItemize}
  54 \item
  55 typedef {\bf th\_\-img\_\-plane} {\bf th\_\-ycbcr\_\-buffer} [3]
  56 \begin{DoxyCompactList}\small\item\em A complete image buffer for an uncompressed frame. \item\end{DoxyCompactList}\item
  57 typedef unsigned char {\bf th\_\-quant\_\-base} [64]
  58 \begin{DoxyCompactList}\small\item\em A single base matrix. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
  59 \subsection*{Enumerations}
  60 \begin{DoxyCompactItemize}
  61 \item
  62 enum {\bf th\_\-colorspace} \{ {\bf TH\_\-CS\_\-UNSPECIFIED},
  63 {\bf TH\_\-CS\_\-ITU\_\-REC\_\-470M},
  64 {\bf TH\_\-CS\_\-ITU\_\-REC\_\-470BG},
  65 {\bf TH\_\-CS\_\-NSPACES}
  66  \}
  67 \begin{DoxyCompactList}\small\item\em The currently defined color space tags. \item\end{DoxyCompactList}\item
  68 enum {\bf th\_\-pixel\_\-fmt} \{ \par
  69 {\bf TH\_\-PF\_\-420},
  70 {\bf TH\_\-PF\_\-RSVD},
  71 {\bf TH\_\-PF\_\-422},
  72 {\bf TH\_\-PF\_\-444},
  73 \par
  74 {\bf TH\_\-PF\_\-NFORMATS}
  75  \}
  76 \begin{DoxyCompactList}\small\item\em The currently defined pixel format tags. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
  77 \subsection*{Functions}
  78 \begin{Indent}{\bf Basic shared functions}\par
  79 {\em \label{_amgrpb625c22fa07613c734f71c378fe32d7a}
  80  }\begin{DoxyCompactItemize}
  81 \item
  82 const char $\ast$ {\bf th\_\-version\_\-string} (void)
  83 \begin{DoxyCompactList}\small\item\em Retrieves a human-\/readable string to identify the library vendor and version. \item\end{DoxyCompactList}\item
  84 ogg\_\-uint32\_\-t {\bf th\_\-version\_\-number} (void)
  85 \begin{DoxyCompactList}\small\item\em Retrieves the library version number. \item\end{DoxyCompactList}\item
  86 ogg\_\-int64\_\-t {\bf th\_\-granule\_\-frame} (void $\ast$\_\-encdec, ogg\_\-int64\_\-t \_\-granpos)
  87 \begin{DoxyCompactList}\small\item\em Converts a granule position to an absolute frame index, starting at {\ttfamily 0}. \item\end{DoxyCompactList}\item
  88 double {\bf th\_\-granule\_\-time} (void $\ast$\_\-encdec, ogg\_\-int64\_\-t \_\-granpos)
  89 \begin{DoxyCompactList}\small\item\em Converts a granule position to an absolute time in seconds. \item\end{DoxyCompactList}\item
  90 int {\bf th\_\-packet\_\-isheader} (ogg\_\-packet $\ast$\_\-op)
  91 \begin{DoxyCompactList}\small\item\em Determines whether a Theora packet is a header or not. \item\end{DoxyCompactList}\item
  92 int {\bf th\_\-packet\_\-iskeyframe} (ogg\_\-packet $\ast$\_\-op)
  93 \begin{DoxyCompactList}\small\item\em Determines whether a theora packet is a key frame or not. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
  94 \end{Indent}
  95 \begin{Indent}{\bf Functions for manipulating header data}\par
  96 {\em \label{_amgrp14ef5f819e97c870c128539ed1f334e3}
  97  }\begin{DoxyCompactItemize}
  98 \item
  99 void {\bf th\_\-info\_\-init} ({\bf th\_\-info} $\ast$\_\-info)
 100 \begin{DoxyCompactList}\small\item\em Initializes a \doxyref{th\_\-info}{p.}{structth__info} structure. \item\end{DoxyCompactList}\item
 101 void {\bf th\_\-info\_\-clear} ({\bf th\_\-info} $\ast$\_\-info)
 102 \begin{DoxyCompactList}\small\item\em Clears a \doxyref{th\_\-info}{p.}{structth__info} structure. \item\end{DoxyCompactList}\item
 103 void {\bf th\_\-comment\_\-init} ({\bf th\_\-comment} $\ast$\_\-tc)
 104 \begin{DoxyCompactList}\small\item\em Initialize a \doxyref{th\_\-comment}{p.}{structth__comment} structure. \item\end{DoxyCompactList}\item
 105 void {\bf th\_\-comment\_\-add} ({\bf th\_\-comment} $\ast$\_\-tc, char $\ast$\_\-comment)
 106 \begin{DoxyCompactList}\small\item\em Add a comment to an initialized \doxyref{th\_\-comment}{p.}{structth__comment} structure. \item\end{DoxyCompactList}\item
 107 void {\bf th\_\-comment\_\-add\_\-tag} ({\bf th\_\-comment} $\ast$\_\-tc, char $\ast$\_\-tag, char $\ast$\_\-val)
 108 \begin{DoxyCompactList}\small\item\em Add a comment to an initialized \doxyref{th\_\-comment}{p.}{structth__comment} structure. \item\end{DoxyCompactList}\item
 109 char $\ast$ {\bf th\_\-comment\_\-query} ({\bf th\_\-comment} $\ast$\_\-tc, char $\ast$\_\-tag, int \_\-count)
 110 \begin{DoxyCompactList}\small\item\em Look up a comment value by its tag. \item\end{DoxyCompactList}\item
 111 int {\bf th\_\-comment\_\-query\_\-count} ({\bf th\_\-comment} $\ast$\_\-tc, char $\ast$\_\-tag)
 112 \begin{DoxyCompactList}\small\item\em Look up the number of instances of a tag. \item\end{DoxyCompactList}\item
 113 void {\bf th\_\-comment\_\-clear} ({\bf th\_\-comment} $\ast$\_\-tc)
 114 \begin{DoxyCompactList}\small\item\em Clears a \doxyref{th\_\-comment}{p.}{structth__comment} structure. \item\end{DoxyCompactList}\end{DoxyCompactItemize}
 115 \end{Indent}
 116
 117
 118 \subsection{Detailed Description}
 119 The shared {\ttfamily libtheoradec} and {\ttfamily libtheoraenc} C API. You don't need to include this directly.
 120
 121 \subsection{Define Documentation}
 122 \index{codec.h@{codec.h}!\_\-O\_\-THEORA\_\-CODEC\_\-H\_\-@{\_\-O\_\-THEORA\_\-CODEC\_\-H\_\-}}
 123 \index{\_\-O\_\-THEORA\_\-CODEC\_\-H\_\-@{\_\-O\_\-THEORA\_\-CODEC\_\-H\_\-}!codec.h@{codec.h}}
 124 \subsubsection[{\_\-O\_\-THEORA\_\-CODEC\_\-H\_\-}]{\setlength{\rightskip}{0pt plus 5cm}\#define \_\-O\_\-THEORA\_\-CODEC\_\-H\_\-~(1)}\label{codec_8h_a15352a6a862d25ab00a8f06ea65ee75b}
 125 \index{codec.h@{codec.h}!TH\_\-DUPFRAME@{TH\_\-DUPFRAME}}
 126 \index{TH\_\-DUPFRAME@{TH\_\-DUPFRAME}!codec.h@{codec.h}}
 127 \subsubsection[{TH\_\-DUPFRAME}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-DUPFRAME~(1)}\label{codec_8h_ab10e7b64f17a02707fc9348ea9832d09}
 128
 129
 130 The decoded packet represented a dropped frame. The player can continue to display the current frame, as the contents of the decoded frame buffer have not changed. \index{codec.h@{codec.h}!TH\_\-EBADHEADER@{TH\_\-EBADHEADER}}
 131 \index{TH\_\-EBADHEADER@{TH\_\-EBADHEADER}!codec.h@{codec.h}}
 132 \subsubsection[{TH\_\-EBADHEADER}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-EBADHEADER~(-\/20)}\label{codec_8h_af00f7ecc5242d12a717202537324a510}
 133
 134
 135 The contents of the header were incomplete, invalid, or unexpected. \index{codec.h@{codec.h}!TH\_\-EBADPACKET@{TH\_\-EBADPACKET}}
 136 \index{TH\_\-EBADPACKET@{TH\_\-EBADPACKET}!codec.h@{codec.h}}
 137 \subsubsection[{TH\_\-EBADPACKET}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-EBADPACKET~(-\/24)}\label{codec_8h_a6efb84e9c2213a8840003eee2847b27f}
 138
 139
 140 There were errors in the video data packet. \index{codec.h@{codec.h}!TH\_\-EFAULT@{TH\_\-EFAULT}}
 141 \index{TH\_\-EFAULT@{TH\_\-EFAULT}!codec.h@{codec.h}}
 142 \subsubsection[{TH\_\-EFAULT}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-EFAULT~(-\/1)}\label{codec_8h_a4d8d8e34fc5ec39ffa05d61a310a0407}
 143
 144
 145 An invalid pointer was provided. \index{codec.h@{codec.h}!TH\_\-EIMPL@{TH\_\-EIMPL}}
 146 \index{TH\_\-EIMPL@{TH\_\-EIMPL}!codec.h@{codec.h}}
 147 \subsubsection[{TH\_\-EIMPL}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-EIMPL~(-\/23)}\label{codec_8h_a921c47accc17841f220af5a6afb79efe}
 148
 149
 150 The specified function is not implemented. \index{codec.h@{codec.h}!TH\_\-EINVAL@{TH\_\-EINVAL}}
 151 \index{TH\_\-EINVAL@{TH\_\-EINVAL}!codec.h@{codec.h}}
 152 \subsubsection[{TH\_\-EINVAL}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-EINVAL~(-\/10)}\label{codec_8h_afbbd9f19fbf292aeb62a37792cecb870}
 153
 154
 155 An invalid argument was provided. \index{codec.h@{codec.h}!TH\_\-ENOTFORMAT@{TH\_\-ENOTFORMAT}}
 156 \index{TH\_\-ENOTFORMAT@{TH\_\-ENOTFORMAT}!codec.h@{codec.h}}
 157 \subsubsection[{TH\_\-ENOTFORMAT}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-ENOTFORMAT~(-\/21)}\label{codec_8h_a3dc08a00a9aba231be398f3e31726d9c}
 158
 159
 160 The header does not belong to a Theora stream. \index{codec.h@{codec.h}!TH\_\-EVERSION@{TH\_\-EVERSION}}
 161 \index{TH\_\-EVERSION@{TH\_\-EVERSION}!codec.h@{codec.h}}
 162 \subsubsection[{TH\_\-EVERSION}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-EVERSION~(-\/22)}\label{codec_8h_ac3a45ef2b24f75259258edc481e3a122}
 163
 164
 165 The bitstream version is too high. \index{codec.h@{codec.h}!TH\_\-NDCT\_\-TOKENS@{TH\_\-NDCT\_\-TOKENS}}
 166 \index{TH\_\-NDCT\_\-TOKENS@{TH\_\-NDCT\_\-TOKENS}!codec.h@{codec.h}}
 167 \subsubsection[{TH\_\-NDCT\_\-TOKENS}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-NDCT\_\-TOKENS~(32)}\label{codec_8h_a2a44f48084e76a58cae48fb5d47cd422}
 168
 169
 170 The number of DCT token values in each table. \index{codec.h@{codec.h}!TH\_\-NHUFFMAN\_\-TABLES@{TH\_\-NHUFFMAN\_\-TABLES}}
 171 \index{TH\_\-NHUFFMAN\_\-TABLES@{TH\_\-NHUFFMAN\_\-TABLES}!codec.h@{codec.h}}
 172 \subsubsection[{TH\_\-NHUFFMAN\_\-TABLES}]{\setlength{\rightskip}{0pt plus 5cm}\#define TH\_\-NHUFFMAN\_\-TABLES~(80)}\label{codec_8h_a49bf449eae33c5320f0c308f32c6ae42}
 173
 174
 175 The number of Huffman tables used by Theora.
 176
 177 \subsection{Typedef Documentation}
 178 \index{codec.h@{codec.h}!th\_\-quant\_\-base@{th\_\-quant\_\-base}}
 179 \index{th\_\-quant\_\-base@{th\_\-quant\_\-base}!codec.h@{codec.h}}
 180 \subsubsection[{th\_\-quant\_\-base}]{\setlength{\rightskip}{0pt plus 5cm}typedef unsigned char {\bf th\_\-quant\_\-base}[64]}\label{codec_8h_a6a1426d16beef8a311d7f0e9d2e96326}
 181
 182
 183 A single base matrix. \index{codec.h@{codec.h}!th\_\-ycbcr\_\-buffer@{th\_\-ycbcr\_\-buffer}}
 184 \index{th\_\-ycbcr\_\-buffer@{th\_\-ycbcr\_\-buffer}!codec.h@{codec.h}}
 185 \subsubsection[{th\_\-ycbcr\_\-buffer}]{\setlength{\rightskip}{0pt plus 5cm}typedef {\bf th\_\-img\_\-plane} {\bf th\_\-ycbcr\_\-buffer}[3]}\label{codec_8h_a343f7cfabad179cc4fe527cf06873f45}
 186
 187
 188 A complete image buffer for an uncompressed frame. The chroma planes may be decimated by a factor of two in either direction, as indicated by \doxyref{th\_\-info::pixel\_\-fmt}{p.}{structth__info_a2301388ef3755c41ab12fd144c1fc54e}. The width and height of the Y' plane must be multiples of 16. They may need to be cropped for display, using the rectangle specified by \doxyref{th\_\-info::pic\_\-x}{p.}{structth__info_a5b3f834bcf141564e7bb14f49101870f}, \doxyref{th\_\-info::pic\_\-y}{p.}{structth__info_a8aacc575cab2dfe3735001c2ad32aa14}, \doxyref{th\_\-info::pic\_\-width}{p.}{structth__info_a5048edf77b141dd3e9a92ca85e317345}, and \doxyref{th\_\-info::pic\_\-height}{p.}{structth__info_a775178474283c5990ba73f9ba7f6b88b}. All samples are 8 bits. \begin{DoxyNote}{Note}
 189 The term YUV often used to describe a colorspace is ambiguous. The exact parameters of the RGB to YUV conversion process aside, in many contexts the U and V channels actually have opposite meanings. To avoid this confusion, we are explicit: the name of the color channels are Y'CbCr, and they appear in that order, always. The prime symbol denotes that the Y channel is non-\/linear. Cb and Cr stand for \char`\"{}Chroma blue\char`\"{} and \char`\"{}Chroma red\char`\"{}, respectively.
 190 \end{DoxyNote}
 191
 192
 193 \subsection{Enumeration Type Documentation}
 194 \index{codec.h@{codec.h}!th\_\-colorspace@{th\_\-colorspace}}
 195 \index{th\_\-colorspace@{th\_\-colorspace}!codec.h@{codec.h}}
 196 \subsubsection[{th\_\-colorspace}]{\setlength{\rightskip}{0pt plus 5cm}enum {\bf th\_\-colorspace}}\label{codec_8h_a4ce7a695ce353b1582d29b6c1ddf31a0}
 197
 198
 199 The currently defined color space tags. See {\tt the Theora specification}, Chapter 4, for exact details on the meaning of each of these color spaces. \begin{Desc}
 200 \item[Enumerator: ]\par
 201 \begin{description}
 202 \index{TH\_\-CS\_\-UNSPECIFIED@{TH\_\-CS\_\-UNSPECIFIED}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-CS\_\-UNSPECIFIED@{TH\_\-CS\_\-UNSPECIFIED}}\item[{\em
 203 TH\_\-CS\_\-UNSPECIFIED\label{codec_8h_a4ce7a695ce353b1582d29b6c1ddf31a0adb9a17a3283c8d490652e507db2427cf}
 204 }]The color space was not specified at the encoder. It may be conveyed by an external means. \index{TH\_\-CS\_\-ITU\_\-REC\_\-470M@{TH\_\-CS\_\-ITU\_\-REC\_\-470M}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-CS\_\-ITU\_\-REC\_\-470M@{TH\_\-CS\_\-ITU\_\-REC\_\-470M}}\item[{\em
 205 TH\_\-CS\_\-ITU\_\-REC\_\-470M\label{codec_8h_a4ce7a695ce353b1582d29b6c1ddf31a0a1a19346bbfb8192baa4c185df73d3397}
 206 }]A color space designed for NTSC content. \index{TH\_\-CS\_\-ITU\_\-REC\_\-470BG@{TH\_\-CS\_\-ITU\_\-REC\_\-470BG}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-CS\_\-ITU\_\-REC\_\-470BG@{TH\_\-CS\_\-ITU\_\-REC\_\-470BG}}\item[{\em
 207 TH\_\-CS\_\-ITU\_\-REC\_\-470BG\label{codec_8h_a4ce7a695ce353b1582d29b6c1ddf31a0a009021d50836ddb0ec6004a2803775fe}
 208 }]A color space designed for PAL/SECAM content. \index{TH\_\-CS\_\-NSPACES@{TH\_\-CS\_\-NSPACES}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-CS\_\-NSPACES@{TH\_\-CS\_\-NSPACES}}\item[{\em
 209 TH\_\-CS\_\-NSPACES\label{codec_8h_a4ce7a695ce353b1582d29b6c1ddf31a0a0fa8ea07f583ee57943520ddb2f6e62e}
 210 }]The total number of currently defined color spaces. \end{description}
 211 \end{Desc}
 212
 213 \index{codec.h@{codec.h}!th\_\-pixel\_\-fmt@{th\_\-pixel\_\-fmt}}
 214 \index{th\_\-pixel\_\-fmt@{th\_\-pixel\_\-fmt}!codec.h@{codec.h}}
 215 \subsubsection[{th\_\-pixel\_\-fmt}]{\setlength{\rightskip}{0pt plus 5cm}enum {\bf th\_\-pixel\_\-fmt}}\label{codec_8h_a5c9e7f2f0c7ed209c9ca3ed0abd328bc}
 216
 217
 218 The currently defined pixel format tags. See {\tt the Theora specification}, Section 4.4, for details on the precise sample locations. \begin{Desc}
 219 \item[Enumerator: ]\par
 220 \begin{description}
 221 \index{TH\_\-PF\_\-420@{TH\_\-PF\_\-420}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-PF\_\-420@{TH\_\-PF\_\-420}}\item[{\em
 222 TH\_\-PF\_\-420\label{codec_8h_a5c9e7f2f0c7ed209c9ca3ed0abd328bcafed7ad7ee4345930255827bff6055162}
 223 }]Chroma decimation by 2 in both the X and Y directions (4:2:0). The Cb and Cr chroma planes are half the width and half the height of the luma plane. \index{TH\_\-PF\_\-RSVD@{TH\_\-PF\_\-RSVD}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-PF\_\-RSVD@{TH\_\-PF\_\-RSVD}}\item[{\em
 224 TH\_\-PF\_\-RSVD\label{codec_8h_a5c9e7f2f0c7ed209c9ca3ed0abd328bca9e60af0159d42b20806d7eb4a8b833e6}
 225 }]Currently reserved. \index{TH\_\-PF\_\-422@{TH\_\-PF\_\-422}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-PF\_\-422@{TH\_\-PF\_\-422}}\item[{\em
 226 TH\_\-PF\_\-422\label{codec_8h_a5c9e7f2f0c7ed209c9ca3ed0abd328bca0271d01babf2f51512479f4a6245b9fa}
 227 }]Chroma decimation by 2 in the X direction (4:2:2). The Cb and Cr chroma planes are half the width of the luma plane, but full height. \index{TH\_\-PF\_\-444@{TH\_\-PF\_\-444}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-PF\_\-444@{TH\_\-PF\_\-444}}\item[{\em
 228 TH\_\-PF\_\-444\label{codec_8h_a5c9e7f2f0c7ed209c9ca3ed0abd328bca2ac50ac048ea75501a5e0f99a63c8c86}
 229 }]No chroma decimation (4:4:4). The Cb and Cr chroma planes are full width and full height. \index{TH\_\-PF\_\-NFORMATS@{TH\_\-PF\_\-NFORMATS}!codec.h@{codec.h}}\index{codec.h@{codec.h}!TH\_\-PF\_\-NFORMATS@{TH\_\-PF\_\-NFORMATS}}\item[{\em
 230 TH\_\-PF\_\-NFORMATS\label{codec_8h_a5c9e7f2f0c7ed209c9ca3ed0abd328bca2d6d78b9df1df086bb60f32f963a31eb}
 231 }]The total number of currently defined pixel formats. \end{description}
 232 \end{Desc}
 233