/Documentation/DocBook/v4l/pixfmt-vyuy.xml

https://bitbucket.org/abioy/linux · XML · 128 lines · 116 code · 5 blank · 7 comment · 0 complexity · 60c58c31cf42eb45d3648d4d8f0d0aff MD5 · raw file 

    

  1. <refentry id="V4L2-PIX-FMT-VYUY">
    2. 

  2.       <refmeta>
    3. 

  3. 	<refentrytitle>V4L2_PIX_FMT_VYUY ('VYUY')</refentrytitle>
    4. 

  4. 	&manvol;
    5. 

  5.       </refmeta>
    6. 

  6.       <refnamediv>
    7. 

  7. 	<refname><constant>V4L2_PIX_FMT_VYUY</constant></refname>
    8. 

  8. 	<refpurpose>Variation of
    9. 

  9. <constant>V4L2_PIX_FMT_YUYV</constant> with different order of samples
    10. 

  10. in memory</refpurpose>
    11. 

  11.       </refnamediv>
    12. 

  12.       <refsect1>
    13. 

  13. 	<title>Description</title>
    14. 

  14. 

  15. 	<para>In this format each four bytes is two pixels. Each four
    16. 

  16. bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
    17. 

  17. the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
    18. 

  18. components have half the horizontal resolution of the Y
    19. 

  19. component.</para>
    20. 

  20. 

  21. 	<example>
    22. 

  22. 	  <title><constant>V4L2_PIX_FMT_VYUY</constant> 4 &times; 4
    23. 

  23. pixel image</title>
    24. 

  24. 

  25. 	  <formalpara>
    26. 

  26. 	    <title>Byte Order.</title>
    27. 

  27. 	    <para>Each cell is one byte.
    28. 

  28. 		<informaltable frame="none">
    29. 

  29. 		<tgroup cols="9" align="center">
    30. 

  30. 		  <colspec align="left" colwidth="2*" />
    31. 

  31. 		  <tbody valign="top">
    32. 

  32. 		    <row>
    33. 

  33. 		      <entry>start&nbsp;+&nbsp;0:</entry>
    34. 

  34. 		      <entry>Cr<subscript>00</subscript></entry>
    35. 

  35. 		      <entry>Y'<subscript>00</subscript></entry>
    36. 

  36. 		      <entry>Cb<subscript>00</subscript></entry>
    37. 

  37. 		      <entry>Y'<subscript>01</subscript></entry>
    38. 

  38. 		      <entry>Cr<subscript>01</subscript></entry>
    39. 

  39. 		      <entry>Y'<subscript>02</subscript></entry>
    40. 

  40. 		      <entry>Cb<subscript>01</subscript></entry>
    41. 

  41. 		      <entry>Y'<subscript>03</subscript></entry>
    42. 

  42. 		    </row>
    43. 

  43. 		    <row>
    44. 

  44. 		      <entry>start&nbsp;+&nbsp;8:</entry>
    45. 

  45. 		      <entry>Cr<subscript>10</subscript></entry>
    46. 

  46. 		      <entry>Y'<subscript>10</subscript></entry>
    47. 

  47. 		      <entry>Cb<subscript>10</subscript></entry>
    48. 

  48. 		      <entry>Y'<subscript>11</subscript></entry>
    49. 

  49. 		      <entry>Cr<subscript>11</subscript></entry>
    50. 

  50. 		      <entry>Y'<subscript>12</subscript></entry>
    51. 

  51. 		      <entry>Cb<subscript>11</subscript></entry>
    52. 

  52. 		      <entry>Y'<subscript>13</subscript></entry>
    53. 

  53. 		    </row>
    54. 

  54. 		    <row>
    55. 

  55. 		      <entry>start&nbsp;+&nbsp;16:</entry>
    56. 

  56. 		      <entry>Cr<subscript>20</subscript></entry>
    57. 

  57. 		      <entry>Y'<subscript>20</subscript></entry>
    58. 

  58. 		      <entry>Cb<subscript>20</subscript></entry>
    59. 

  59. 		      <entry>Y'<subscript>21</subscript></entry>
    60. 

  60. 		      <entry>Cr<subscript>21</subscript></entry>
    61. 

  61. 		      <entry>Y'<subscript>22</subscript></entry>
    62. 

  62. 		      <entry>Cb<subscript>21</subscript></entry>
    63. 

  63. 		      <entry>Y'<subscript>23</subscript></entry>
    64. 

  64. 		    </row>
    65. 

  65. 		    <row>
    66. 

  66. 		      <entry>start&nbsp;+&nbsp;24:</entry>
    67. 

  67. 		      <entry>Cr<subscript>30</subscript></entry>
    68. 

  68. 		      <entry>Y'<subscript>30</subscript></entry>
    69. 

  69. 		      <entry>Cb<subscript>30</subscript></entry>
    70. 

  70. 		      <entry>Y'<subscript>31</subscript></entry>
    71. 

  71. 		      <entry>Cr<subscript>31</subscript></entry>
    72. 

  72. 		      <entry>Y'<subscript>32</subscript></entry>
    73. 

  73. 		      <entry>Cb<subscript>31</subscript></entry>
    74. 

  74. 		      <entry>Y'<subscript>33</subscript></entry>
    75. 

  75. 		    </row>
    76. 

  76. 		  </tbody>
    77. 

  77. 		</tgroup>
    78. 

  78. 		</informaltable>
    79. 

  79. 	      </para>
    80. 

  80. 	  </formalpara>
    81. 

  81. 

  82. 	  <formalpara>
    83. 

  83. 	    <title>Color Sample Location.</title>
    84. 

  84. 	    <para>
    85. 

  85. 		<informaltable frame="none">
    86. 

  86. 		<tgroup cols="7" align="center">
    87. 

  87. 		  <tbody valign="top">
    88. 

  88. 		    <row>
    89. 

  89. 		      <entry></entry>
    90. 

  90. 		      <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
    91. 

  91. 		      <entry>2</entry><entry></entry><entry>3</entry>
    92. 

  92. 		    </row>
    93. 

  93. 		    <row>
    94. 

  94. 		      <entry>0</entry>
    95. 

  95. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
    96. 

  96. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
    97. 

  97. 		    </row>
    98. 

  98. 		    <row>
    99. 

  99. 		      <entry>1</entry>
    100. 

  100. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
    101. 

  101. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
    102. 

  102. 		    </row>
    103. 

  103. 		    <row>
    104. 

  104. 		      <entry>2</entry>
    105. 

  105. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
    106. 

  106. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
    107. 

  107. 		    </row>
    108. 

  108. 		    <row>
    109. 

  109. 		      <entry>3</entry>
    110. 

  110. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
    111. 

  111. 		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
    112. 

  112. 		    </row>
    113. 

  113. 		  </tbody>
    114. 

  114. 		</tgroup>
    115. 

  115. 		</informaltable>
    116. 

  116. 	      </para>
    117. 

  117. 	  </formalpara>
    118. 

  118. 	</example>
    119. 

  119.       </refsect1>
    120. 

  120.     </refentry>
    121. 

  121. 

  122.   <!--
    123. 

  123. Local Variables:
    124. 

  124. mode: sgml
    125. 

  125. sgml-parent-document: "pixfmt.sgml"
    126. 

  126. indent-tabs-mode: nil
    127. 

  127. End:
    128. 

  128.   -->
    129.